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 | { | |
d0fb9a8d JJ |
376 | unsigned int r_type = ELF64_R_TYPE(dst->r_info); |
377 | switch (r_type) | |
a85d7ed0 NC |
378 | { |
379 | case R_390_GNU_VTINHERIT: | |
380 | cache_ptr->howto = &elf64_s390_vtinherit_howto; | |
381 | break; | |
382 | ||
383 | case R_390_GNU_VTENTRY: | |
384 | cache_ptr->howto = &elf64_s390_vtentry_howto; | |
385 | break; | |
386 | ||
387 | default: | |
d0fb9a8d JJ |
388 | if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) |
389 | { | |
390 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
391 | abfd, (int) r_type); | |
392 | r_type = R_390_NONE; | |
393 | } | |
394 | cache_ptr->howto = &elf_howto_table[r_type]; | |
99c79b2e | 395 | } |
a85d7ed0 NC |
396 | } |
397 | ||
69fc87f1 MS |
398 | /* A relocation function which doesn't do anything. */ |
399 | static bfd_reloc_status_type | |
400 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 401 | output_bfd, error_message) |
69fc87f1 MS |
402 | bfd *abfd ATTRIBUTE_UNUSED; |
403 | arelent *reloc_entry; | |
404 | asymbol *symbol ATTRIBUTE_UNUSED; | |
405 | PTR data ATTRIBUTE_UNUSED; | |
406 | asection *input_section; | |
407 | bfd *output_bfd; | |
408 | char **error_message ATTRIBUTE_UNUSED; | |
409 | { | |
410 | if (output_bfd) | |
411 | reloc_entry->address += input_section->output_offset; | |
412 | return bfd_reloc_ok; | |
413 | } | |
414 | ||
bd1ea41b MS |
415 | /* Handle the large displacement relocs. */ |
416 | static bfd_reloc_status_type | |
417 | s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, | |
418 | output_bfd, error_message) | |
419 | bfd *abfd; | |
420 | arelent *reloc_entry; | |
421 | asymbol *symbol; | |
422 | PTR data; | |
423 | asection *input_section; | |
424 | bfd *output_bfd; | |
425 | char **error_message ATTRIBUTE_UNUSED; | |
426 | { | |
427 | reloc_howto_type *howto = reloc_entry->howto; | |
428 | bfd_vma relocation; | |
429 | bfd_vma insn; | |
430 | ||
431 | if (output_bfd != (bfd *) NULL | |
432 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
433 | && (! howto->partial_inplace | |
434 | || reloc_entry->addend == 0)) | |
435 | { | |
436 | reloc_entry->address += input_section->output_offset; | |
437 | return bfd_reloc_ok; | |
438 | } | |
439 | if (output_bfd != NULL) | |
440 | return bfd_reloc_continue; | |
441 | ||
07515404 | 442 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
bd1ea41b MS |
443 | return bfd_reloc_outofrange; |
444 | ||
445 | relocation = (symbol->value | |
446 | + symbol->section->output_section->vma | |
447 | + symbol->section->output_offset); | |
448 | relocation += reloc_entry->addend; | |
449 | if (howto->pc_relative) | |
450 | { | |
451 | relocation -= (input_section->output_section->vma | |
452 | + input_section->output_offset); | |
453 | relocation -= reloc_entry->address; | |
454 | } | |
455 | ||
456 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
457 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; | |
458 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
459 | ||
460 | if ((bfd_signed_vma) relocation < - 0x80000 | |
461 | || (bfd_signed_vma) relocation > 0x7ffff) | |
462 | return bfd_reloc_overflow; | |
463 | else | |
464 | return bfd_reloc_ok; | |
465 | } | |
466 | ||
b34976b6 | 467 | static bfd_boolean |
a85d7ed0 NC |
468 | elf_s390_is_local_label_name (abfd, name) |
469 | bfd *abfd; | |
470 | const char *name; | |
471 | { | |
472 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 473 | return TRUE; |
a85d7ed0 NC |
474 | |
475 | return _bfd_elf_is_local_label_name (abfd, name); | |
476 | } | |
477 | ||
478 | /* Functions for the 390 ELF linker. */ | |
479 | ||
480 | /* The name of the dynamic interpreter. This is put in the .interp | |
481 | section. */ | |
482 | ||
483 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
484 | ||
64285810 MS |
485 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
486 | copying dynamic variables from a shared lib into an app's dynbss | |
487 | section, and instead use a dynamic relocation to point into the | |
488 | shared lib. */ | |
489 | #define ELIMINATE_COPY_RELOCS 1 | |
490 | ||
a85d7ed0 NC |
491 | /* The size in bytes of the first entry in the procedure linkage table. */ |
492 | #define PLT_FIRST_ENTRY_SIZE 32 | |
493 | /* The size in bytes of an entry in the procedure linkage table. */ | |
99c79b2e | 494 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
495 | |
496 | #define GOT_ENTRY_SIZE 8 | |
497 | ||
498 | /* The first three entries in a procedure linkage table are reserved, | |
499 | and the initial contents are unimportant (we zero them out). | |
500 | Subsequent entries look like this. See the SVR4 ABI 386 | |
501 | supplement to see how this works. */ | |
502 | ||
503 | /* For the s390, simple addr offset can only be 0 - 4096. | |
504 | To use the full 16777216 TB address space, several instructions | |
505 | are needed to load an address in a register and execute | |
506 | a branch( or just saving the address) | |
507 | ||
99c79b2e | 508 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
509 | |
510 | /* The first 3 words in the GOT are then reserved. | |
511 | Word 0 is the address of the dynamic table. | |
512 | Word 1 is a pointer to a structure describing the object | |
513 | Word 2 is used to point to the loader entry address. | |
514 | ||
515 | The code for PLT entries looks like this: | |
516 | ||
517 | The GOT holds the address in the PLT to be executed. | |
518 | The loader then gets: | |
519 | 24(15) = Pointer to the structure describing the object. | |
99c79b2e | 520 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
521 | The loader must then find the module where the function is |
522 | and insert the address in the GOT. | |
523 | ||
524 | PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 | |
525 | LG 1,0(1) # 6 bytes Load address from GOT in r1 | |
526 | BCR 15,1 # 2 bytes Jump to address | |
527 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
528 | LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 | |
529 | BRCL 15,-x # 6 bytes Jump to start of PLT | |
530 | .long ? # 4 bytes offset into symbol table | |
531 | ||
532 | Total = 32 bytes per PLT entry | |
533 | Fixup at offset 2: relative address to GOT entry | |
534 | Fixup at offset 22: relative branch to PLT0 | |
535 | Fixup at offset 28: 32 bit offset into symbol table | |
536 | ||
537 | A 32 bit offset into the symbol table is enough. It allows for symbol | |
538 | tables up to a size of 2 gigabyte. A single dynamic object (the main | |
539 | program, any shared library) is limited to 4GB in size and I want to see | |
540 | the program that manages to have a symbol table of more than 2 GB with a | |
541 | total size of at max 4 GB. */ | |
542 | ||
dc810e39 AM |
543 | #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000 |
544 | #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310 | |
545 | #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004 | |
546 | #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10 | |
547 | #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c | |
548 | #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4 | |
549 | #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000 | |
550 | #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000 | |
a85d7ed0 NC |
551 | |
552 | /* The first PLT entry pushes the offset into the symbol table | |
553 | from R1 onto the stack at 8(15) and the loader object info | |
554 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
555 | ||
556 | /* The first entry in the PLT: | |
557 | ||
558 | PLT0: | |
559 | STG 1,56(15) # r1 contains the offset into the symbol table | |
560 | LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table | |
561 | MVC 48(8,15),8(1) # move loader ino (object struct address) to stack | |
562 | LG 1,16(1) # get entry address of loader | |
563 | BCR 15,1 # jump to loader | |
564 | ||
565 | Fixup at offset 8: relative address to start of GOT. */ | |
566 | ||
dc810e39 AM |
567 | #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038 |
568 | #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010 | |
569 | #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000 | |
570 | #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030 | |
571 | #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310 | |
572 | #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004 | |
573 | #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700 | |
574 | #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700 | |
a85d7ed0 NC |
575 | |
576 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
577 | decides to copy as dynamic relocs in check_relocs for each symbol. |
578 | This is so that it can later discard them if they are found to be | |
579 | unnecessary. We store the information in a field extending the | |
580 | regular ELF linker hash table. */ | |
a85d7ed0 | 581 | |
0451c93c | 582 | struct elf_s390_dyn_relocs |
a85d7ed0 | 583 | { |
0451c93c MS |
584 | struct elf_s390_dyn_relocs *next; |
585 | ||
586 | /* The input section of the reloc. */ | |
587 | asection *sec; | |
588 | ||
589 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 590 | bfd_size_type count; |
0451c93c MS |
591 | |
592 | /* Number of pc-relative relocs copied for the input section. */ | |
593 | bfd_size_type pc_count; | |
a85d7ed0 NC |
594 | }; |
595 | ||
596 | /* s390 ELF linker hash entry. */ | |
597 | ||
598 | struct elf_s390_link_hash_entry | |
599 | { | |
0451c93c | 600 | struct elf_link_hash_entry elf; |
a85d7ed0 | 601 | |
0451c93c MS |
602 | /* Track dynamic relocs copied for this symbol. */ |
603 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
604 | |
605 | /* Number of GOTPLT references for a function. */ | |
606 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
607 | |
608 | #define GOT_UNKNOWN 0 | |
609 | #define GOT_NORMAL 1 | |
610 | #define GOT_TLS_GD 2 | |
611 | #define GOT_TLS_IE 3 | |
612 | #define GOT_TLS_IE_NLT 3 | |
613 | unsigned char tls_type; | |
a85d7ed0 NC |
614 | }; |
615 | ||
69fc87f1 MS |
616 | #define elf_s390_hash_entry(ent) \ |
617 | ((struct elf_s390_link_hash_entry *)(ent)) | |
618 | ||
619 | struct elf_s390_obj_tdata | |
620 | { | |
621 | struct elf_obj_tdata root; | |
622 | ||
623 | /* tls_type for each local got entry. */ | |
624 | char *local_got_tls_type; | |
625 | }; | |
626 | ||
627 | #define elf_s390_tdata(abfd) \ | |
628 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
629 | ||
630 | #define elf_s390_local_got_tls_type(abfd) \ | |
631 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
632 | ||
633 | static bfd_boolean | |
634 | elf_s390_mkobject (abfd) | |
635 | bfd *abfd; | |
636 | { | |
637 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
638 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
639 | if (abfd->tdata.any == NULL) | |
640 | return FALSE; | |
641 | return TRUE; | |
642 | } | |
643 | ||
644 | static bfd_boolean | |
645 | elf_s390_object_p (abfd) | |
646 | bfd *abfd; | |
647 | { | |
69fc87f1 MS |
648 | /* Set the right machine number for an s390 elf32 file. */ |
649 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); | |
650 | } | |
651 | ||
a85d7ed0 NC |
652 | /* s390 ELF linker hash table. */ |
653 | ||
654 | struct elf_s390_link_hash_table | |
655 | { | |
0451c93c | 656 | struct elf_link_hash_table elf; |
a85d7ed0 | 657 | |
0451c93c MS |
658 | /* Short-cuts to get to dynamic linker sections. */ |
659 | asection *sgot; | |
660 | asection *sgotplt; | |
661 | asection *srelgot; | |
662 | asection *splt; | |
663 | asection *srelplt; | |
664 | asection *sdynbss; | |
665 | asection *srelbss; | |
ec338859 | 666 | |
69fc87f1 MS |
667 | union { |
668 | bfd_signed_vma refcount; | |
669 | bfd_vma offset; | |
670 | } tls_ldm_got; | |
671 | ||
ec338859 AM |
672 | /* Small local sym to section mapping cache. */ |
673 | struct sym_sec_cache sym_sec; | |
0451c93c | 674 | }; |
a85d7ed0 NC |
675 | |
676 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
677 | ||
678 | #define elf_s390_hash_table(p) \ | |
679 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
680 | ||
681 | /* Create an entry in an s390 ELF linker hash table. */ | |
682 | ||
683 | static struct bfd_hash_entry * | |
0451c93c | 684 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
685 | struct bfd_hash_entry *entry; |
686 | struct bfd_hash_table *table; | |
687 | const char *string; | |
688 | { | |
a85d7ed0 NC |
689 | /* Allocate the structure if it has not already been allocated by a |
690 | subclass. */ | |
0451c93c MS |
691 | if (entry == NULL) |
692 | { | |
693 | entry = bfd_hash_allocate (table, | |
694 | sizeof (struct elf_s390_link_hash_entry)); | |
695 | if (entry == NULL) | |
696 | return entry; | |
697 | } | |
a85d7ed0 NC |
698 | |
699 | /* Call the allocation method of the superclass. */ | |
0451c93c MS |
700 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
701 | if (entry != NULL) | |
a85d7ed0 | 702 | { |
0451c93c MS |
703 | struct elf_s390_link_hash_entry *eh; |
704 | ||
705 | eh = (struct elf_s390_link_hash_entry *) entry; | |
706 | eh->dyn_relocs = NULL; | |
5236c819 | 707 | eh->gotplt_refcount = 0; |
69fc87f1 | 708 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
709 | } |
710 | ||
0451c93c | 711 | return entry; |
a85d7ed0 NC |
712 | } |
713 | ||
714 | /* Create an s390 ELF linker hash table. */ | |
715 | ||
716 | static struct bfd_link_hash_table * | |
717 | elf_s390_link_hash_table_create (abfd) | |
718 | bfd *abfd; | |
719 | { | |
720 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 721 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 722 | |
e2d34d7d | 723 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 724 | if (ret == NULL) |
a85d7ed0 NC |
725 | return NULL; |
726 | ||
0451c93c | 727 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
a85d7ed0 | 728 | { |
e2d34d7d | 729 | free (ret); |
a85d7ed0 NC |
730 | return NULL; |
731 | } | |
732 | ||
0451c93c MS |
733 | ret->sgot = NULL; |
734 | ret->sgotplt = NULL; | |
735 | ret->srelgot = NULL; | |
736 | ret->splt = NULL; | |
737 | ret->srelplt = NULL; | |
738 | ret->sdynbss = NULL; | |
739 | ret->srelbss = NULL; | |
69fc87f1 | 740 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 741 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
742 | |
743 | return &ret->elf.root; | |
744 | } | |
745 | ||
746 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
747 | shortcuts to them in our hash table. */ | |
748 | ||
b34976b6 | 749 | static bfd_boolean |
0451c93c MS |
750 | create_got_section (dynobj, info) |
751 | bfd *dynobj; | |
752 | struct bfd_link_info *info; | |
753 | { | |
754 | struct elf_s390_link_hash_table *htab; | |
755 | ||
756 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 757 | return FALSE; |
0451c93c MS |
758 | |
759 | htab = elf_s390_hash_table (info); | |
760 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
761 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
762 | if (!htab->sgot || !htab->sgotplt) | |
763 | abort (); | |
764 | ||
3496cb2a L |
765 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", |
766 | (SEC_ALLOC | SEC_LOAD | |
767 | | SEC_HAS_CONTENTS | |
768 | | SEC_IN_MEMORY | |
769 | | SEC_LINKER_CREATED | |
770 | | SEC_READONLY)); | |
0451c93c | 771 | if (htab->srelgot == NULL |
99881371 | 772 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
773 | return FALSE; |
774 | return TRUE; | |
0451c93c MS |
775 | } |
776 | ||
777 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
778 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
779 | hash table. */ | |
780 | ||
b34976b6 | 781 | static bfd_boolean |
0451c93c MS |
782 | elf_s390_create_dynamic_sections (dynobj, info) |
783 | bfd *dynobj; | |
784 | struct bfd_link_info *info; | |
785 | { | |
786 | struct elf_s390_link_hash_table *htab; | |
787 | ||
788 | htab = elf_s390_hash_table (info); | |
789 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 790 | return FALSE; |
0451c93c MS |
791 | |
792 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 793 | return FALSE; |
0451c93c MS |
794 | |
795 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
796 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
797 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
798 | if (!info->shared) | |
799 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
800 | ||
801 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
802 | || (!info->shared && !htab->srelbss)) | |
803 | abort (); | |
804 | ||
b34976b6 | 805 | return TRUE; |
a85d7ed0 NC |
806 | } |
807 | ||
0451c93c MS |
808 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
809 | ||
810 | static void | |
b48fa14c | 811 | elf_s390_copy_indirect_symbol (bed, dir, ind) |
9c5bfbb7 | 812 | const struct elf_backend_data *bed; |
0451c93c MS |
813 | struct elf_link_hash_entry *dir, *ind; |
814 | { | |
815 | struct elf_s390_link_hash_entry *edir, *eind; | |
816 | ||
817 | edir = (struct elf_s390_link_hash_entry *) dir; | |
818 | eind = (struct elf_s390_link_hash_entry *) ind; | |
819 | ||
820 | if (eind->dyn_relocs != NULL) | |
821 | { | |
822 | if (edir->dyn_relocs != NULL) | |
823 | { | |
824 | struct elf_s390_dyn_relocs **pp; | |
825 | struct elf_s390_dyn_relocs *p; | |
826 | ||
827 | if (ind->root.type == bfd_link_hash_indirect) | |
828 | abort (); | |
829 | ||
830 | /* Add reloc counts against the weak sym to the strong sym | |
831 | list. Merge any entries against the same section. */ | |
832 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
833 | { | |
834 | struct elf_s390_dyn_relocs *q; | |
835 | ||
836 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
837 | if (q->sec == p->sec) | |
838 | { | |
839 | q->pc_count += p->pc_count; | |
840 | q->count += p->count; | |
841 | *pp = p->next; | |
842 | break; | |
843 | } | |
844 | if (q == NULL) | |
845 | pp = &p->next; | |
846 | } | |
847 | *pp = edir->dyn_relocs; | |
848 | } | |
849 | ||
850 | edir->dyn_relocs = eind->dyn_relocs; | |
851 | eind->dyn_relocs = NULL; | |
852 | } | |
853 | ||
69fc87f1 MS |
854 | if (ind->root.type == bfd_link_hash_indirect |
855 | && dir->got.refcount <= 0) | |
856 | { | |
857 | edir->tls_type = eind->tls_type; | |
858 | eind->tls_type = GOT_UNKNOWN; | |
859 | } | |
860 | ||
64285810 MS |
861 | if (ELIMINATE_COPY_RELOCS |
862 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
863 | && dir->dynamic_adjusted) |
864 | { | |
865 | /* If called to transfer flags for a weakdef during processing | |
866 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
867 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
868 | dir->ref_dynamic |= ind->ref_dynamic; | |
869 | dir->ref_regular |= ind->ref_regular; | |
870 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
871 | dir->needs_plt |= ind->needs_plt; | |
872 | } | |
64285810 MS |
873 | else |
874 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
0451c93c | 875 | } |
a85d7ed0 | 876 | |
69fc87f1 MS |
877 | static int |
878 | elf_s390_tls_transition (info, r_type, is_local) | |
879 | struct bfd_link_info *info; | |
880 | int r_type; | |
881 | int is_local; | |
882 | { | |
883 | if (info->shared) | |
884 | return r_type; | |
885 | ||
886 | switch (r_type) | |
887 | { | |
888 | case R_390_TLS_GD64: | |
889 | case R_390_TLS_IE64: | |
890 | if (is_local) | |
891 | return R_390_TLS_LE64; | |
892 | return R_390_TLS_IE64; | |
893 | case R_390_TLS_GOTIE64: | |
894 | if (is_local) | |
895 | return R_390_TLS_LE64; | |
896 | return R_390_TLS_GOTIE64; | |
897 | case R_390_TLS_LDM64: | |
898 | return R_390_TLS_LE64; | |
899 | } | |
900 | ||
901 | return r_type; | |
902 | } | |
903 | ||
a85d7ed0 NC |
904 | /* Look through the relocs for a section during the first phase, and |
905 | allocate space in the global offset table or procedure linkage | |
906 | table. */ | |
907 | ||
b34976b6 | 908 | static bfd_boolean |
a85d7ed0 NC |
909 | elf_s390_check_relocs (abfd, info, sec, relocs) |
910 | bfd *abfd; | |
911 | struct bfd_link_info *info; | |
912 | asection *sec; | |
913 | const Elf_Internal_Rela *relocs; | |
914 | { | |
0451c93c | 915 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
916 | Elf_Internal_Shdr *symtab_hdr; |
917 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
918 | const Elf_Internal_Rela *rel; |
919 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 920 | asection *sreloc; |
5236c819 | 921 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 922 | int tls_type, old_tls_type; |
a85d7ed0 | 923 | |
1049f94e | 924 | if (info->relocatable) |
b34976b6 | 925 | return TRUE; |
a85d7ed0 | 926 | |
0451c93c | 927 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
928 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
929 | sym_hashes = elf_sym_hashes (abfd); | |
5236c819 | 930 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 931 | |
a85d7ed0 NC |
932 | sreloc = NULL; |
933 | ||
934 | rel_end = relocs + sec->reloc_count; | |
935 | for (rel = relocs; rel < rel_end; rel++) | |
936 | { | |
69fc87f1 | 937 | unsigned int r_type; |
a85d7ed0 NC |
938 | unsigned long r_symndx; |
939 | struct elf_link_hash_entry *h; | |
940 | ||
941 | r_symndx = ELF64_R_SYM (rel->r_info); | |
942 | ||
0451c93c MS |
943 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
944 | { | |
d003868e AM |
945 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
946 | abfd, | |
0451c93c | 947 | r_symndx); |
b34976b6 | 948 | return FALSE; |
0451c93c MS |
949 | } |
950 | ||
a85d7ed0 NC |
951 | if (r_symndx < symtab_hdr->sh_info) |
952 | h = NULL; | |
953 | else | |
973a3492 L |
954 | { |
955 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
956 | while (h->root.type == bfd_link_hash_indirect | |
957 | || h->root.type == bfd_link_hash_warning) | |
958 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
959 | } | |
a85d7ed0 | 960 | |
5236c819 MS |
961 | /* Create got section and local_got_refcounts array if they |
962 | are needed. */ | |
69fc87f1 MS |
963 | r_type = elf_s390_tls_transition (info, |
964 | ELF64_R_TYPE (rel->r_info), | |
965 | h == NULL); | |
966 | switch (r_type) | |
a85d7ed0 NC |
967 | { |
968 | case R_390_GOT12: | |
947216bf | 969 | case R_390_GOT16: |
bd1ea41b | 970 | case R_390_GOT20: |
a85d7ed0 NC |
971 | case R_390_GOT32: |
972 | case R_390_GOT64: | |
973 | case R_390_GOTENT: | |
5236c819 MS |
974 | case R_390_GOTPLT12: |
975 | case R_390_GOTPLT16: | |
bd1ea41b | 976 | case R_390_GOTPLT20: |
5236c819 MS |
977 | case R_390_GOTPLT32: |
978 | case R_390_GOTPLT64: | |
979 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
980 | case R_390_TLS_GD64: |
981 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 982 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
983 | case R_390_TLS_GOTIE64: |
984 | case R_390_TLS_IEENT: | |
985 | case R_390_TLS_IE64: | |
986 | case R_390_TLS_LDM64: | |
5236c819 MS |
987 | if (h == NULL |
988 | && local_got_refcounts == NULL) | |
a85d7ed0 | 989 | { |
5236c819 | 990 | bfd_size_type size; |
0451c93c | 991 | |
5236c819 | 992 | size = symtab_hdr->sh_info; |
69fc87f1 | 993 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
994 | local_got_refcounts = ((bfd_signed_vma *) |
995 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 996 | if (local_got_refcounts == NULL) |
5236c819 MS |
997 | return FALSE; |
998 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
999 | elf_s390_local_got_tls_type (abfd) |
1000 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 1001 | } |
5236c819 MS |
1002 | /* Fall through. */ |
1003 | case R_390_GOTOFF16: | |
1004 | case R_390_GOTOFF32: | |
1005 | case R_390_GOTOFF64: | |
0451c93c MS |
1006 | case R_390_GOTPC: |
1007 | case R_390_GOTPCDBL: | |
1008 | if (htab->sgot == NULL) | |
1009 | { | |
1010 | if (htab->elf.dynobj == NULL) | |
1011 | htab->elf.dynobj = abfd; | |
1012 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1013 | return FALSE; |
0451c93c | 1014 | } |
5236c819 MS |
1015 | } |
1016 | ||
69fc87f1 | 1017 | switch (r_type) |
5236c819 | 1018 | { |
5236c819 MS |
1019 | case R_390_GOTOFF16: |
1020 | case R_390_GOTOFF32: | |
1021 | case R_390_GOTOFF64: | |
1022 | case R_390_GOTPC: | |
1023 | case R_390_GOTPCDBL: | |
1024 | /* Got is created, nothing to be done. */ | |
0451c93c | 1025 | break; |
ec338859 | 1026 | |
947216bf | 1027 | case R_390_PLT16DBL: |
a85d7ed0 NC |
1028 | case R_390_PLT32: |
1029 | case R_390_PLT32DBL: | |
1030 | case R_390_PLT64: | |
5236c819 MS |
1031 | case R_390_PLTOFF16: |
1032 | case R_390_PLTOFF32: | |
1033 | case R_390_PLTOFF64: | |
a85d7ed0 | 1034 | /* This symbol requires a procedure linkage table entry. We |
947216bf AM |
1035 | actually build the entry in adjust_dynamic_symbol, |
1036 | because this might be a case of linking PIC code which is | |
1037 | never referenced by a dynamic object, in which case we | |
1038 | don't need to generate a procedure linkage table entry | |
1039 | after all. */ | |
ec338859 | 1040 | |
a85d7ed0 | 1041 | /* If this is a local symbol, we resolve it directly without |
947216bf | 1042 | creating a procedure linkage table entry. */ |
5236c819 MS |
1043 | if (h != NULL) |
1044 | { | |
f5385ebf | 1045 | h->needs_plt = 1; |
5236c819 MS |
1046 | h->plt.refcount += 1; |
1047 | } | |
1048 | break; | |
ec338859 | 1049 | |
5236c819 MS |
1050 | case R_390_GOTPLT12: |
1051 | case R_390_GOTPLT16: | |
bd1ea41b | 1052 | case R_390_GOTPLT20: |
5236c819 MS |
1053 | case R_390_GOTPLT32: |
1054 | case R_390_GOTPLT64: | |
1055 | case R_390_GOTPLTENT: | |
1056 | /* This symbol requires either a procedure linkage table entry | |
1057 | or an entry in the local got. We actually build the entry | |
1058 | in adjust_dynamic_symbol because whether this is really a | |
1059 | global reference can change and with it the fact if we have | |
1060 | to create a plt entry or a local got entry. To be able to | |
1061 | make a once global symbol a local one we have to keep track | |
1062 | of the number of gotplt references that exist for this | |
1063 | symbol. */ | |
1064 | if (h != NULL) | |
1065 | { | |
1066 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
f5385ebf | 1067 | h->needs_plt = 1; |
5236c819 MS |
1068 | h->plt.refcount += 1; |
1069 | } | |
69fc87f1 MS |
1070 | else |
1071 | local_got_refcounts[r_symndx] += 1; | |
1072 | break; | |
1073 | ||
1074 | case R_390_TLS_LDM64: | |
1075 | htab->tls_ldm_got.refcount += 1; | |
1076 | break; | |
1077 | ||
1078 | case R_390_TLS_IE64: | |
1079 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1080 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1081 | case R_390_TLS_GOTIE64: |
1082 | case R_390_TLS_IEENT: | |
1083 | if (info->shared) | |
1084 | info->flags |= DF_STATIC_TLS; | |
1085 | /* Fall through */ | |
1086 | ||
1087 | case R_390_GOT12: | |
26e41594 | 1088 | case R_390_GOT16: |
bd1ea41b | 1089 | case R_390_GOT20: |
69fc87f1 MS |
1090 | case R_390_GOT32: |
1091 | case R_390_GOT64: | |
1092 | case R_390_GOTENT: | |
1093 | case R_390_TLS_GD64: | |
1094 | /* This symbol requires a global offset table entry. */ | |
1095 | switch (r_type) | |
1096 | { | |
1097 | default: | |
1098 | case R_390_GOT12: | |
1099 | case R_390_GOT16: | |
bd1ea41b | 1100 | case R_390_GOT20: |
69fc87f1 MS |
1101 | case R_390_GOT32: |
1102 | case R_390_GOTENT: | |
1103 | tls_type = GOT_NORMAL; | |
1104 | break; | |
1105 | case R_390_TLS_GD64: | |
1106 | tls_type = GOT_TLS_GD; | |
1107 | break; | |
1108 | case R_390_TLS_IE64: | |
1109 | case R_390_TLS_GOTIE64: | |
1110 | tls_type = GOT_TLS_IE; | |
1111 | break; | |
1112 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1113 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1114 | case R_390_TLS_IEENT: |
1115 | tls_type = GOT_TLS_IE_NLT; | |
1116 | break; | |
1117 | } | |
1118 | ||
1119 | if (h != NULL) | |
1120 | { | |
1121 | h->got.refcount += 1; | |
1122 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1123 | } | |
5236c819 MS |
1124 | else |
1125 | { | |
1126 | local_got_refcounts[r_symndx] += 1; | |
69fc87f1 | 1127 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; |
5236c819 | 1128 | } |
69fc87f1 MS |
1129 | /* If a TLS symbol is accessed using IE at least once, |
1130 | there is no point to use dynamic model for it. */ | |
1131 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1132 | { | |
1133 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1134 | { | |
1135 | (*_bfd_error_handler) | |
d003868e AM |
1136 | (_("%B: `%s' accessed both as normal and thread local symbol"), |
1137 | abfd, h->root.root.string); | |
69fc87f1 MS |
1138 | return FALSE; |
1139 | } | |
1140 | if (old_tls_type > tls_type) | |
1141 | tls_type = old_tls_type; | |
1142 | } | |
1143 | ||
1144 | if (old_tls_type != tls_type) | |
1145 | { | |
1146 | if (h != NULL) | |
1147 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1148 | else | |
1149 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1150 | } | |
1151 | ||
1152 | if (r_type != R_390_TLS_IE64) | |
1153 | break; | |
1154 | /* Fall through */ | |
1155 | ||
1156 | case R_390_TLS_LE64: | |
1157 | if (!info->shared) | |
1158 | break; | |
1159 | info->flags |= DF_STATIC_TLS; | |
1160 | /* Fall through */ | |
ec338859 | 1161 | |
947216bf AM |
1162 | case R_390_8: |
1163 | case R_390_16: | |
a85d7ed0 NC |
1164 | case R_390_32: |
1165 | case R_390_64: | |
947216bf AM |
1166 | case R_390_PC16: |
1167 | case R_390_PC16DBL: | |
a85d7ed0 NC |
1168 | case R_390_PC32: |
1169 | case R_390_PC32DBL: | |
1170 | case R_390_PC64: | |
0451c93c MS |
1171 | if (h != NULL && !info->shared) |
1172 | { | |
1173 | /* If this reloc is in a read-only section, we might | |
1174 | need a copy reloc. We can't check reliably at this | |
1175 | stage whether the section is read-only, as input | |
1176 | sections have not yet been mapped to output sections. | |
1177 | Tentatively set the flag for now, and correct in | |
1178 | adjust_dynamic_symbol. */ | |
f5385ebf | 1179 | h->non_got_ref = 1; |
ec338859 | 1180 | |
0451c93c MS |
1181 | /* We may need a .plt entry if the function this reloc |
1182 | refers to is in a shared lib. */ | |
1183 | h->plt.refcount += 1; | |
1184 | } | |
ec338859 | 1185 | |
a85d7ed0 | 1186 | /* If we are creating a shared library, and this is a reloc |
0451c93c MS |
1187 | against a global symbol, or a non PC relative reloc |
1188 | against a local symbol, then we need to copy the reloc | |
1189 | into the shared library. However, if we are linking with | |
1190 | -Bsymbolic, we do not need to copy a reloc against a | |
1191 | global symbol which is defined in an object we are | |
1192 | including in the link (i.e., DEF_REGULAR is set). At | |
1193 | this point we have not seen all the input files, so it is | |
1194 | possible that DEF_REGULAR is not set now but will be set | |
1195 | later (it is never cleared). In case of a weak definition, | |
1196 | DEF_REGULAR may be cleared later by a strong definition in | |
1197 | a shared library. We account for that possibility below by | |
1198 | storing information in the relocs_copied field of the hash | |
1199 | table entry. A similar situation occurs when creating | |
1200 | shared libraries and symbol visibility changes render the | |
1201 | symbol local. | |
1202 | ||
1203 | If on the other hand, we are creating an executable, we | |
1204 | may need to keep relocations for symbols satisfied by a | |
1205 | dynamic library if we manage to avoid copy relocs for the | |
1206 | symbol. */ | |
1207 | if ((info->shared | |
1208 | && (sec->flags & SEC_ALLOC) != 0 | |
1209 | && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 | |
1210 | && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL | |
1211 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32 | |
1212 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL | |
1213 | && ELF64_R_TYPE (rel->r_info) != R_390_PC64) | |
1214 | || (h != NULL | |
1215 | && (! info->symbolic | |
1216 | || h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1217 | || !h->def_regular)))) |
64285810 MS |
1218 | || (ELIMINATE_COPY_RELOCS |
1219 | && !info->shared | |
0451c93c MS |
1220 | && (sec->flags & SEC_ALLOC) != 0 |
1221 | && h != NULL | |
1222 | && (h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1223 | || !h->def_regular))) |
a85d7ed0 | 1224 | { |
ec338859 AM |
1225 | struct elf_s390_dyn_relocs *p; |
1226 | struct elf_s390_dyn_relocs **head; | |
1227 | ||
0451c93c MS |
1228 | /* We must copy these reloc types into the output file. |
1229 | Create a reloc section in dynobj and make room for | |
1230 | this reloc. */ | |
a85d7ed0 NC |
1231 | if (sreloc == NULL) |
1232 | { | |
1233 | const char *name; | |
0451c93c | 1234 | bfd *dynobj; |
ec338859 | 1235 | |
a85d7ed0 NC |
1236 | name = (bfd_elf_string_from_elf_section |
1237 | (abfd, | |
1238 | elf_elfheader (abfd)->e_shstrndx, | |
1239 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1240 | if (name == NULL) | |
b34976b6 | 1241 | return FALSE; |
ec338859 | 1242 | |
0451c93c MS |
1243 | if (strncmp (name, ".rela", 5) != 0 |
1244 | || strcmp (bfd_get_section_name (abfd, sec), | |
1245 | name + 5) != 0) | |
1246 | { | |
1247 | (*_bfd_error_handler) | |
d003868e AM |
1248 | (_("%B: bad relocation section name `%s\'"), |
1249 | abfd, name); | |
0451c93c | 1250 | } |
ec338859 | 1251 | |
0451c93c MS |
1252 | if (htab->elf.dynobj == NULL) |
1253 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1254 | |
0451c93c | 1255 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
1256 | sreloc = bfd_get_section_by_name (dynobj, name); |
1257 | if (sreloc == NULL) | |
1258 | { | |
1259 | flagword flags; | |
ec338859 | 1260 | |
a85d7ed0 NC |
1261 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
1262 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1263 | if ((sec->flags & SEC_ALLOC) != 0) | |
1264 | flags |= SEC_ALLOC | SEC_LOAD; | |
3496cb2a L |
1265 | sreloc = bfd_make_section_with_flags (dynobj, |
1266 | name, | |
1267 | flags); | |
a85d7ed0 | 1268 | if (sreloc == NULL |
99881371 | 1269 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 1270 | return FALSE; |
a85d7ed0 | 1271 | } |
0451c93c | 1272 | elf_section_data (sec)->sreloc = sreloc; |
a85d7ed0 | 1273 | } |
ec338859 | 1274 | |
0451c93c MS |
1275 | /* If this is a global symbol, we count the number of |
1276 | relocations we need for this symbol. */ | |
1277 | if (h != NULL) | |
a85d7ed0 | 1278 | { |
ec338859 | 1279 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1280 | } |
1281 | else | |
1282 | { | |
ec338859 AM |
1283 | /* Track dynamic relocs needed for local syms too. |
1284 | We really need local syms available to do this | |
1285 | easily. Oh well. */ | |
1286 | ||
1287 | asection *s; | |
1288 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1289 | sec, r_symndx); | |
1290 | if (s == NULL) | |
b34976b6 | 1291 | return FALSE; |
ec338859 AM |
1292 | |
1293 | head = ((struct elf_s390_dyn_relocs **) | |
1294 | &elf_section_data (s)->local_dynrel); | |
1295 | } | |
1296 | ||
1297 | p = *head; | |
1298 | if (p == NULL || p->sec != sec) | |
1299 | { | |
1300 | bfd_size_type amt = sizeof *p; | |
1301 | p = ((struct elf_s390_dyn_relocs *) | |
1302 | bfd_alloc (htab->elf.dynobj, amt)); | |
1303 | if (p == NULL) | |
b34976b6 | 1304 | return FALSE; |
ec338859 AM |
1305 | p->next = *head; |
1306 | *head = p; | |
1307 | p->sec = sec; | |
1308 | p->count = 0; | |
1309 | p->pc_count = 0; | |
a85d7ed0 | 1310 | } |
ec338859 AM |
1311 | |
1312 | p->count += 1; | |
1313 | if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 | |
1314 | || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL | |
1315 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32 | |
1316 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL | |
1317 | || ELF64_R_TYPE (rel->r_info) == R_390_PC64) | |
1318 | p->pc_count += 1; | |
a85d7ed0 | 1319 | } |
a85d7ed0 | 1320 | break; |
ec338859 | 1321 | |
a85d7ed0 NC |
1322 | /* This relocation describes the C++ object vtable hierarchy. |
1323 | Reconstruct it for later use during GC. */ | |
947216bf | 1324 | case R_390_GNU_VTINHERIT: |
c152c796 | 1325 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1326 | return FALSE; |
947216bf | 1327 | break; |
ec338859 | 1328 | |
a85d7ed0 NC |
1329 | /* This relocation describes which C++ vtable entries are actually |
1330 | used. Record for later use during GC. */ | |
947216bf | 1331 | case R_390_GNU_VTENTRY: |
c152c796 | 1332 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 1333 | return FALSE; |
947216bf | 1334 | break; |
ec338859 | 1335 | |
a85d7ed0 NC |
1336 | default: |
1337 | break; | |
1338 | } | |
1339 | } | |
1340 | ||
b34976b6 | 1341 | return TRUE; |
a85d7ed0 NC |
1342 | } |
1343 | ||
1344 | /* Return the section that should be marked against GC for a given | |
1345 | relocation. */ | |
1346 | ||
1347 | static asection * | |
1e2f5b6e AM |
1348 | elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
1349 | asection *sec; | |
a85d7ed0 NC |
1350 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1351 | Elf_Internal_Rela *rel; | |
1352 | struct elf_link_hash_entry *h; | |
1353 | Elf_Internal_Sym *sym; | |
1354 | { | |
1355 | if (h != NULL) | |
1356 | { | |
1357 | switch (ELF64_R_TYPE (rel->r_info)) | |
1358 | { | |
1359 | case R_390_GNU_VTINHERIT: | |
1360 | case R_390_GNU_VTENTRY: | |
1361 | break; | |
1362 | ||
1363 | default: | |
1364 | switch (h->root.type) | |
1365 | { | |
1366 | case bfd_link_hash_defined: | |
1367 | case bfd_link_hash_defweak: | |
1368 | return h->root.u.def.section; | |
1369 | ||
1370 | case bfd_link_hash_common: | |
1371 | return h->root.u.c.p->section; | |
1372 | ||
1373 | default: | |
1374 | break; | |
1375 | } | |
1376 | } | |
1377 | } | |
1378 | else | |
1e2f5b6e | 1379 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
a85d7ed0 NC |
1380 | |
1381 | return NULL; | |
1382 | } | |
1383 | ||
1384 | /* Update the got entry reference counts for the section being removed. */ | |
1385 | ||
b34976b6 | 1386 | static bfd_boolean |
a85d7ed0 | 1387 | elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
0451c93c MS |
1388 | bfd *abfd; |
1389 | struct bfd_link_info *info; | |
1390 | asection *sec; | |
1391 | const Elf_Internal_Rela *relocs; | |
a85d7ed0 NC |
1392 | { |
1393 | Elf_Internal_Shdr *symtab_hdr; | |
1394 | struct elf_link_hash_entry **sym_hashes; | |
1395 | bfd_signed_vma *local_got_refcounts; | |
1396 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1397 | |
ec338859 | 1398 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1399 | |
0451c93c MS |
1400 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1401 | sym_hashes = elf_sym_hashes (abfd); | |
1402 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1403 | |
1404 | relend = relocs + sec->reloc_count; | |
1405 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1406 | { |
26e41594 AM |
1407 | unsigned long r_symndx; |
1408 | unsigned int r_type; | |
1409 | struct elf_link_hash_entry *h = NULL; | |
1410 | ||
5236c819 | 1411 | r_symndx = ELF64_R_SYM (rel->r_info); |
26e41594 AM |
1412 | if (r_symndx >= symtab_hdr->sh_info) |
1413 | { | |
1414 | struct elf_s390_link_hash_entry *eh; | |
1415 | struct elf_s390_dyn_relocs **pp; | |
1416 | struct elf_s390_dyn_relocs *p; | |
5236c819 | 1417 | |
26e41594 | 1418 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1419 | while (h->root.type == bfd_link_hash_indirect |
1420 | || h->root.type == bfd_link_hash_warning) | |
1421 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1422 | eh = (struct elf_s390_link_hash_entry *) h; |
5236c819 | 1423 | |
26e41594 AM |
1424 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1425 | if (p->sec == sec) | |
1426 | { | |
1427 | /* Everything must go for SEC. */ | |
1428 | *pp = p->next; | |
1429 | break; | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | r_type = ELF64_R_TYPE (rel->r_info); | |
1434 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1435 | switch (r_type) |
5236c819 | 1436 | { |
69fc87f1 MS |
1437 | case R_390_TLS_LDM64: |
1438 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1439 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1440 | break; | |
1441 | ||
1442 | case R_390_TLS_GD64: | |
1443 | case R_390_TLS_IE64: | |
1444 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1445 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1446 | case R_390_TLS_GOTIE64: |
1447 | case R_390_TLS_IEENT: | |
5236c819 MS |
1448 | case R_390_GOT12: |
1449 | case R_390_GOT16: | |
bd1ea41b | 1450 | case R_390_GOT20: |
5236c819 MS |
1451 | case R_390_GOT32: |
1452 | case R_390_GOT64: | |
1453 | case R_390_GOTOFF16: | |
1454 | case R_390_GOTOFF32: | |
1455 | case R_390_GOTOFF64: | |
1456 | case R_390_GOTPC: | |
1457 | case R_390_GOTPCDBL: | |
1458 | case R_390_GOTENT: | |
1459 | if (h != NULL) | |
1460 | { | |
1461 | if (h->got.refcount > 0) | |
1462 | h->got.refcount -= 1; | |
1463 | } | |
1464 | else if (local_got_refcounts != NULL) | |
1465 | { | |
1466 | if (local_got_refcounts[r_symndx] > 0) | |
1467 | local_got_refcounts[r_symndx] -= 1; | |
1468 | } | |
26e41594 | 1469 | break; |
a85d7ed0 | 1470 | |
5236c819 MS |
1471 | case R_390_8: |
1472 | case R_390_12: | |
1473 | case R_390_16: | |
bd1ea41b | 1474 | case R_390_20: |
5236c819 MS |
1475 | case R_390_32: |
1476 | case R_390_64: | |
1477 | case R_390_PC16: | |
1478 | case R_390_PC16DBL: | |
1479 | case R_390_PC32: | |
1480 | case R_390_PC32DBL: | |
1481 | case R_390_PC64: | |
26e41594 AM |
1482 | if (info->shared) |
1483 | break; | |
1484 | /* Fall through */ | |
a85d7ed0 | 1485 | |
69fc87f1 MS |
1486 | case R_390_PLT16DBL: |
1487 | case R_390_PLT32: | |
1488 | case R_390_PLT32DBL: | |
1489 | case R_390_PLT64: | |
1490 | case R_390_PLTOFF16: | |
1491 | case R_390_PLTOFF32: | |
1492 | case R_390_PLTOFF64: | |
1493 | if (h != NULL) | |
1494 | { | |
1495 | if (h->plt.refcount > 0) | |
1496 | h->plt.refcount -= 1; | |
1497 | } | |
1498 | break; | |
1499 | ||
1500 | case R_390_GOTPLT12: | |
1501 | case R_390_GOTPLT16: | |
bd1ea41b | 1502 | case R_390_GOTPLT20: |
69fc87f1 MS |
1503 | case R_390_GOTPLT32: |
1504 | case R_390_GOTPLT64: | |
1505 | case R_390_GOTPLTENT: | |
1506 | if (h != NULL) | |
1507 | { | |
1508 | if (h->plt.refcount > 0) | |
1509 | { | |
1510 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1511 | h->plt.refcount -= 1; | |
1512 | } | |
1513 | } | |
1514 | else if (local_got_refcounts != NULL) | |
1515 | { | |
1516 | if (local_got_refcounts[r_symndx] > 0) | |
1517 | local_got_refcounts[r_symndx] -= 1; | |
1518 | } | |
1519 | break; | |
1520 | ||
5236c819 MS |
1521 | default: |
1522 | break; | |
1523 | } | |
1524 | } | |
a85d7ed0 | 1525 | |
b34976b6 | 1526 | return TRUE; |
a85d7ed0 NC |
1527 | } |
1528 | ||
5236c819 MS |
1529 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1530 | entry but we found we will not create any. Called when we find we will | |
1531 | not have any PLT for this symbol, by for example | |
1532 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1533 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1534 | created (we're only linking static objects). */ | |
1535 | ||
1536 | static void | |
1537 | elf_s390_adjust_gotplt (h) | |
1538 | struct elf_s390_link_hash_entry *h; | |
1539 | { | |
1540 | if (h->elf.root.type == bfd_link_hash_warning) | |
1541 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1542 | ||
1543 | if (h->gotplt_refcount <= 0) | |
1544 | return; | |
1545 | ||
1546 | /* We simply add the number of gotplt references to the number | |
1547 | * of got references for this symbol. */ | |
1548 | h->elf.got.refcount += h->gotplt_refcount; | |
1549 | h->gotplt_refcount = -1; | |
1550 | } | |
1551 | ||
a85d7ed0 NC |
1552 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1553 | regular object. The current definition is in some section of the | |
1554 | dynamic object, but we're not including those sections. We have to | |
1555 | change the definition to something the rest of the link can | |
1556 | understand. */ | |
1557 | ||
b34976b6 | 1558 | static bfd_boolean |
a85d7ed0 NC |
1559 | elf_s390_adjust_dynamic_symbol (info, h) |
1560 | struct bfd_link_info *info; | |
1561 | struct elf_link_hash_entry *h; | |
1562 | { | |
0451c93c | 1563 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1564 | asection *s; |
1565 | unsigned int power_of_two; | |
1566 | ||
a85d7ed0 NC |
1567 | /* If this is a function, put it in the procedure linkage table. We |
1568 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1569 | (although we could actually do it here). */ |
a85d7ed0 | 1570 | if (h->type == STT_FUNC |
f5385ebf | 1571 | || h->needs_plt) |
a85d7ed0 | 1572 | { |
0451c93c MS |
1573 | if (h->plt.refcount <= 0 |
1574 | || (! info->shared | |
f5385ebf AM |
1575 | && !h->def_dynamic |
1576 | && !h->ref_dynamic | |
f9cd9119 MS |
1577 | && h->root.type != bfd_link_hash_undefweak |
1578 | && h->root.type != bfd_link_hash_undefined)) | |
a85d7ed0 NC |
1579 | { |
1580 | /* This case can occur if we saw a PLT32 reloc in an input | |
947216bf AM |
1581 | file, but the symbol was never referred to by a dynamic |
1582 | object, or if all references were garbage collected. In | |
0451c93c MS |
1583 | such a case, we don't actually need to build a procedure |
1584 | linkage table, and we can just do a PC32 reloc instead. */ | |
a85d7ed0 | 1585 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1586 | h->needs_plt = 0; |
5236c819 | 1587 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1588 | } |
1589 | ||
b34976b6 | 1590 | return TRUE; |
a85d7ed0 | 1591 | } |
bbd7ec4a | 1592 | else |
0451c93c MS |
1593 | /* It's possible that we incorrectly decided a .plt reloc was |
1594 | needed for an R_390_PC32 reloc to a non-function sym in | |
1595 | check_relocs. We can't decide accurately between function and | |
1596 | non-function syms in check-relocs; Objects loaded later in | |
1597 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1598 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1599 | |
1600 | /* If this is a weak symbol, and there is a real definition, the | |
1601 | processor independent code will have arranged for us to see the | |
1602 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 1603 | if (h->u.weakdef != NULL) |
a85d7ed0 | 1604 | { |
f6e332e6 AM |
1605 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1606 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1607 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1608 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
64285810 | 1609 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1610 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1611 | return TRUE; |
a85d7ed0 NC |
1612 | } |
1613 | ||
1614 | /* This is a reference to a symbol defined by a dynamic object which | |
1615 | is not a function. */ | |
1616 | ||
1617 | /* If we are creating a shared library, we must presume that the | |
1618 | only references to the symbol are via the global offset table. | |
1619 | For such cases we need not do anything here; the relocations will | |
1620 | be handled correctly by relocate_section. */ | |
1621 | if (info->shared) | |
b34976b6 | 1622 | return TRUE; |
a85d7ed0 NC |
1623 | |
1624 | /* If there are no references to this symbol that do not use the | |
1625 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1626 | if (!h->non_got_ref) |
b34976b6 | 1627 | return TRUE; |
a85d7ed0 | 1628 | |
0451c93c MS |
1629 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1630 | if (info->nocopyreloc) | |
1631 | { | |
f5385ebf | 1632 | h->non_got_ref = 0; |
b34976b6 | 1633 | return TRUE; |
0451c93c MS |
1634 | } |
1635 | ||
64285810 | 1636 | if (ELIMINATE_COPY_RELOCS) |
0451c93c | 1637 | { |
64285810 MS |
1638 | struct elf_s390_link_hash_entry * eh; |
1639 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1640 | |
64285810 MS |
1641 | eh = (struct elf_s390_link_hash_entry *) h; |
1642 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1643 | { | |
1644 | s = p->sec->output_section; | |
1645 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1646 | break; | |
1647 | } | |
1648 | ||
1649 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1650 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1651 | if (p == NULL) | |
1652 | { | |
f5385ebf | 1653 | h->non_got_ref = 0; |
64285810 MS |
1654 | return TRUE; |
1655 | } | |
0451c93c MS |
1656 | } |
1657 | ||
909272ee AM |
1658 | if (h->size == 0) |
1659 | { | |
1660 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1661 | h->root.root.string); | |
1662 | return TRUE; | |
1663 | } | |
1664 | ||
a85d7ed0 NC |
1665 | /* We must allocate the symbol in our .dynbss section, which will |
1666 | become part of the .bss section of the executable. There will be | |
1667 | an entry for this symbol in the .dynsym section. The dynamic | |
1668 | object will contain position independent code, so all references | |
1669 | from the dynamic object to this symbol will go through the global | |
1670 | offset table. The dynamic linker will use the .dynsym entry to | |
1671 | determine the address it must put in the global offset table, so | |
1672 | both the dynamic object and the regular object will refer to the | |
1673 | same memory location for the variable. */ | |
1674 | ||
0451c93c | 1675 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1676 | |
0451c93c MS |
1677 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1678 | copy the initial value out of the dynamic object and into the | |
1679 | runtime process image. */ | |
a85d7ed0 NC |
1680 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1681 | { | |
eea6121a | 1682 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1683 | h->needs_copy = 1; |
a85d7ed0 NC |
1684 | } |
1685 | ||
1686 | /* We need to figure out the alignment required for this symbol. I | |
1687 | have no idea how ELF linkers handle this. */ | |
1688 | power_of_two = bfd_log2 (h->size); | |
1689 | if (power_of_two > 3) | |
1690 | power_of_two = 3; | |
1691 | ||
1692 | /* Apply the required alignment. */ | |
0451c93c | 1693 | s = htab->sdynbss; |
eea6121a | 1694 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
0451c93c | 1695 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
a85d7ed0 | 1696 | { |
0451c93c | 1697 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1698 | return FALSE; |
a85d7ed0 NC |
1699 | } |
1700 | ||
1701 | /* Define the symbol as being at this point in the section. */ | |
1702 | h->root.u.def.section = s; | |
eea6121a | 1703 | h->root.u.def.value = s->size; |
a85d7ed0 NC |
1704 | |
1705 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1706 | s->size += h->size; |
a85d7ed0 | 1707 | |
b34976b6 | 1708 | return TRUE; |
a85d7ed0 NC |
1709 | } |
1710 | ||
0451c93c MS |
1711 | /* Allocate space in .plt, .got and associated reloc sections for |
1712 | dynamic relocs. */ | |
1713 | ||
b34976b6 | 1714 | static bfd_boolean |
0451c93c MS |
1715 | allocate_dynrelocs (h, inf) |
1716 | struct elf_link_hash_entry *h; | |
1717 | PTR inf; | |
1718 | { | |
1719 | struct bfd_link_info *info; | |
1720 | struct elf_s390_link_hash_table *htab; | |
1721 | struct elf_s390_link_hash_entry *eh; | |
1722 | struct elf_s390_dyn_relocs *p; | |
1723 | ||
e92d460e | 1724 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1725 | return TRUE; |
0451c93c | 1726 | |
e92d460e | 1727 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1728 | /* When warning symbols are created, they **replace** the "real" |
1729 | entry in the hash table, thus we never get to see the real | |
1730 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1731 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1732 | ||
0451c93c MS |
1733 | info = (struct bfd_link_info *) inf; |
1734 | htab = elf_s390_hash_table (info); | |
1735 | ||
1736 | if (htab->elf.dynamic_sections_created | |
82058a73 MS |
1737 | && h->plt.refcount > 0 |
1738 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1739 | || h->root.type != bfd_link_hash_undefweak)) | |
0451c93c MS |
1740 | { |
1741 | /* Make sure this symbol is output as a dynamic symbol. | |
1742 | Undefined weak syms won't yet be marked as dynamic. */ | |
1743 | if (h->dynindx == -1 | |
f5385ebf | 1744 | && !h->forced_local) |
0451c93c | 1745 | { |
c152c796 | 1746 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1747 | return FALSE; |
0451c93c MS |
1748 | } |
1749 | ||
82058a73 | 1750 | if (info->shared |
4ec72bde | 1751 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
0451c93c MS |
1752 | { |
1753 | asection *s = htab->splt; | |
1754 | ||
1755 | /* If this is the first .plt entry, make room for the special | |
1756 | first entry. */ | |
eea6121a AM |
1757 | if (s->size == 0) |
1758 | s->size += PLT_FIRST_ENTRY_SIZE; | |
0451c93c | 1759 | |
eea6121a | 1760 | h->plt.offset = s->size; |
0451c93c MS |
1761 | |
1762 | /* If this symbol is not defined in a regular file, and we are | |
1763 | not generating a shared library, then set the symbol to this | |
1764 | location in the .plt. This is required to make function | |
1765 | pointers compare as equal between the normal executable and | |
1766 | the shared library. */ | |
1767 | if (! info->shared | |
f5385ebf | 1768 | && !h->def_regular) |
0451c93c MS |
1769 | { |
1770 | h->root.u.def.section = s; | |
1771 | h->root.u.def.value = h->plt.offset; | |
1772 | } | |
ec338859 | 1773 | |
0451c93c | 1774 | /* Make room for this entry. */ |
eea6121a | 1775 | s->size += PLT_ENTRY_SIZE; |
ec338859 | 1776 | |
0451c93c MS |
1777 | /* We also need to make an entry in the .got.plt section, which |
1778 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1779 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
0451c93c MS |
1780 | |
1781 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1782 | htab->srelplt->size += sizeof (Elf64_External_Rela); |
0451c93c MS |
1783 | } |
1784 | else | |
1785 | { | |
1786 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1787 | h->needs_plt = 0; |
5236c819 | 1788 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1789 | } |
1790 | } | |
1791 | else | |
1792 | { | |
1793 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1794 | h->needs_plt = 0; |
5236c819 | 1795 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1796 | } |
1797 | ||
69fc87f1 MS |
1798 | /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to |
1799 | the binary, we can optimize a bit. IE64 and GOTIE64 get converted | |
1800 | to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT | |
1801 | we can save the dynamic TLS relocation. */ | |
1802 | if (h->got.refcount > 0 | |
1803 | && !info->shared | |
1804 | && h->dynindx == -1 | |
1805 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
1806 | { | |
1807 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) | |
1808 | /* For the GOTIE access without a literal pool entry the offset has | |
1809 | to be stored somewhere. The immediate value in the instruction | |
1810 | is not bit enough so the value is stored in the got. */ | |
1811 | { | |
eea6121a AM |
1812 | h->got.offset = htab->sgot->size; |
1813 | htab->sgot->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1814 | } |
1815 | else | |
1816 | h->got.offset = (bfd_vma) -1; | |
1817 | } | |
1818 | else if (h->got.refcount > 0) | |
0451c93c MS |
1819 | { |
1820 | asection *s; | |
b34976b6 | 1821 | bfd_boolean dyn; |
69fc87f1 | 1822 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1823 | |
1824 | /* Make sure this symbol is output as a dynamic symbol. | |
1825 | Undefined weak syms won't yet be marked as dynamic. */ | |
1826 | if (h->dynindx == -1 | |
f5385ebf | 1827 | && !h->forced_local) |
0451c93c | 1828 | { |
c152c796 | 1829 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1830 | return FALSE; |
0451c93c MS |
1831 | } |
1832 | ||
1833 | s = htab->sgot; | |
eea6121a AM |
1834 | h->got.offset = s->size; |
1835 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1836 | /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ |
1837 | if (tls_type == GOT_TLS_GD) | |
eea6121a | 1838 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 1839 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1840 | /* R_390_TLS_IE64 needs one dynamic relocation, |
1841 | R_390_TLS_GD64 needs one if local symbol and two if global. */ | |
1842 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1843 | || tls_type >= GOT_TLS_IE) | |
eea6121a | 1844 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
69fc87f1 | 1845 | else if (tls_type == GOT_TLS_GD) |
eea6121a | 1846 | htab->srelgot->size += 2 * sizeof (Elf64_External_Rela); |
82058a73 MS |
1847 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1848 | || h->root.type != bfd_link_hash_undefweak) | |
1849 | && (info->shared | |
1850 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1851 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
0451c93c MS |
1852 | } |
1853 | else | |
1854 | h->got.offset = (bfd_vma) -1; | |
1855 | ||
1856 | eh = (struct elf_s390_link_hash_entry *) h; | |
1857 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1858 | return TRUE; |
0451c93c MS |
1859 | |
1860 | /* In the shared -Bsymbolic case, discard space allocated for | |
1861 | dynamic pc-relative relocs against symbols which turn out to be | |
1862 | defined in regular objects. For the normal shared case, discard | |
1863 | space for pc-relative relocs that have become local due to symbol | |
1864 | visibility changes. */ | |
1865 | ||
1866 | if (info->shared) | |
1867 | { | |
1c3ff0f2 | 1868 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
0451c93c MS |
1869 | { |
1870 | struct elf_s390_dyn_relocs **pp; | |
1871 | ||
1872 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1873 | { | |
1874 | p->count -= p->pc_count; | |
1875 | p->pc_count = 0; | |
1876 | if (p->count == 0) | |
1877 | *pp = p->next; | |
1878 | else | |
1879 | pp = &p->next; | |
1880 | } | |
1881 | } | |
82058a73 MS |
1882 | |
1883 | /* Also discard relocs on undefined weak syms with non-default | |
1884 | visibility. */ | |
1885 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1886 | && h->root.type == bfd_link_hash_undefweak) | |
1887 | eh->dyn_relocs = NULL; | |
0451c93c | 1888 | } |
64285810 | 1889 | else if (ELIMINATE_COPY_RELOCS) |
0451c93c MS |
1890 | { |
1891 | /* For the non-shared case, discard space for relocs against | |
1892 | symbols which turn out to need copy relocs or are not | |
1893 | dynamic. */ | |
1894 | ||
f5385ebf AM |
1895 | if (!h->non_got_ref |
1896 | && ((h->def_dynamic | |
1897 | && !h->def_regular) | |
0451c93c MS |
1898 | || (htab->elf.dynamic_sections_created |
1899 | && (h->root.type == bfd_link_hash_undefweak | |
1900 | || h->root.type == bfd_link_hash_undefined)))) | |
1901 | { | |
1902 | /* Make sure this symbol is output as a dynamic symbol. | |
1903 | Undefined weak syms won't yet be marked as dynamic. */ | |
1904 | if (h->dynindx == -1 | |
f5385ebf | 1905 | && !h->forced_local) |
0451c93c | 1906 | { |
c152c796 | 1907 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1908 | return FALSE; |
0451c93c MS |
1909 | } |
1910 | ||
1911 | /* If that succeeded, we know we'll be keeping all the | |
1912 | relocs. */ | |
1913 | if (h->dynindx != -1) | |
1914 | goto keep; | |
1915 | } | |
1916 | ||
1917 | eh->dyn_relocs = NULL; | |
1918 | ||
ec338859 | 1919 | keep: ; |
0451c93c MS |
1920 | } |
1921 | ||
1922 | /* Finally, allocate space. */ | |
1923 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1924 | { | |
1925 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1926 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
0451c93c MS |
1927 | } |
1928 | ||
b34976b6 | 1929 | return TRUE; |
0451c93c MS |
1930 | } |
1931 | ||
1932 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1933 | ||
b34976b6 | 1934 | static bfd_boolean |
0451c93c MS |
1935 | readonly_dynrelocs (h, inf) |
1936 | struct elf_link_hash_entry *h; | |
1937 | PTR inf; | |
1938 | { | |
1939 | struct elf_s390_link_hash_entry *eh; | |
1940 | struct elf_s390_dyn_relocs *p; | |
1941 | ||
e92d460e AM |
1942 | if (h->root.type == bfd_link_hash_warning) |
1943 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1944 | ||
0451c93c MS |
1945 | eh = (struct elf_s390_link_hash_entry *) h; |
1946 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1947 | { | |
1948 | asection *s = p->sec->output_section; | |
1949 | ||
1950 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1951 | { | |
1952 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1953 | ||
1954 | info->flags |= DF_TEXTREL; | |
1955 | ||
1956 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1957 | return FALSE; |
0451c93c MS |
1958 | } |
1959 | } | |
b34976b6 | 1960 | return TRUE; |
0451c93c MS |
1961 | } |
1962 | ||
a85d7ed0 NC |
1963 | /* Set the sizes of the dynamic sections. */ |
1964 | ||
b34976b6 | 1965 | static bfd_boolean |
a85d7ed0 | 1966 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1967 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1968 | struct bfd_link_info *info; |
1969 | { | |
0451c93c | 1970 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1971 | bfd *dynobj; |
1972 | asection *s; | |
b34976b6 | 1973 | bfd_boolean relocs; |
0451c93c | 1974 | bfd *ibfd; |
a85d7ed0 | 1975 | |
0451c93c MS |
1976 | htab = elf_s390_hash_table (info); |
1977 | dynobj = htab->elf.dynobj; | |
1978 | if (dynobj == NULL) | |
1979 | abort (); | |
a85d7ed0 | 1980 | |
0451c93c | 1981 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1982 | { |
1983 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1984 | if (info->executable) |
a85d7ed0 NC |
1985 | { |
1986 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1987 | if (s == NULL) |
1988 | abort (); | |
eea6121a | 1989 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
a85d7ed0 NC |
1990 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1991 | } | |
1992 | } | |
a85d7ed0 | 1993 | |
0451c93c MS |
1994 | /* Set up .got offsets for local syms, and space for local dynamic |
1995 | relocs. */ | |
1996 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 1997 | { |
0451c93c MS |
1998 | bfd_signed_vma *local_got; |
1999 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 2000 | char *local_tls_type; |
0451c93c MS |
2001 | bfd_size_type locsymcount; |
2002 | Elf_Internal_Shdr *symtab_hdr; | |
2003 | asection *srela; | |
a85d7ed0 | 2004 | |
0451c93c | 2005 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
a85d7ed0 NC |
2006 | continue; |
2007 | ||
0451c93c | 2008 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 2009 | { |
ec338859 | 2010 | struct elf_s390_dyn_relocs *p; |
0451c93c | 2011 | |
ec338859 AM |
2012 | for (p = *((struct elf_s390_dyn_relocs **) |
2013 | &elf_section_data (s)->local_dynrel); | |
2014 | p != NULL; | |
2015 | p = p->next) | |
a85d7ed0 | 2016 | { |
ec338859 AM |
2017 | if (!bfd_is_abs_section (p->sec) |
2018 | && bfd_is_abs_section (p->sec->output_section)) | |
2019 | { | |
2020 | /* Input section has been discarded, either because | |
2021 | it is a copy of a linkonce section or due to | |
2022 | linker script /DISCARD/, so we'll be discarding | |
2023 | the relocs too. */ | |
2024 | } | |
248866a8 | 2025 | else if (p->count != 0) |
ec338859 AM |
2026 | { |
2027 | srela = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2028 | srela->size += p->count * sizeof (Elf64_External_Rela); |
248866a8 AM |
2029 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2030 | info->flags |= DF_TEXTREL; | |
ec338859 | 2031 | } |
a85d7ed0 NC |
2032 | } |
2033 | } | |
0451c93c MS |
2034 | |
2035 | local_got = elf_local_got_refcounts (ibfd); | |
2036 | if (!local_got) | |
2037 | continue; | |
2038 | ||
2039 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2040 | locsymcount = symtab_hdr->sh_info; | |
2041 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 2042 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
2043 | s = htab->sgot; |
2044 | srela = htab->srelgot; | |
69fc87f1 | 2045 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 2046 | { |
0451c93c | 2047 | if (*local_got > 0) |
a85d7ed0 | 2048 | { |
eea6121a AM |
2049 | *local_got = s->size; |
2050 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 | 2051 | if (*local_tls_type == GOT_TLS_GD) |
eea6121a | 2052 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 2053 | if (info->shared) |
eea6121a | 2054 | srela->size += sizeof (Elf64_External_Rela); |
a85d7ed0 NC |
2055 | } |
2056 | else | |
0451c93c | 2057 | *local_got = (bfd_vma) -1; |
a85d7ed0 | 2058 | } |
0451c93c MS |
2059 | } |
2060 | ||
69fc87f1 MS |
2061 | if (htab->tls_ldm_got.refcount > 0) |
2062 | { | |
2063 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 | |
2064 | relocs. */ | |
eea6121a AM |
2065 | htab->tls_ldm_got.offset = htab->sgot->size; |
2066 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
2067 | htab->srelgot->size += sizeof (Elf64_External_Rela); | |
69fc87f1 MS |
2068 | } |
2069 | else | |
2070 | htab->tls_ldm_got.offset = -1; | |
2071 | ||
0451c93c MS |
2072 | /* Allocate global sym .plt and .got entries, and space for global |
2073 | sym dynamic relocs. */ | |
2074 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2075 | ||
2076 | /* We now have determined the sizes of the various dynamic sections. | |
2077 | Allocate memory for them. */ | |
b34976b6 | 2078 | relocs = FALSE; |
0451c93c MS |
2079 | for (s = dynobj->sections; s != NULL; s = s->next) |
2080 | { | |
2081 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2082 | continue; | |
2083 | ||
2084 | if (s == htab->splt | |
2085 | || s == htab->sgot | |
c456f082 AM |
2086 | || s == htab->sgotplt |
2087 | || s == htab->sdynbss) | |
0451c93c MS |
2088 | { |
2089 | /* Strip this section if we don't need it; see the | |
2090 | comment below. */ | |
2091 | } | |
2092 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
2093 | { | |
eea6121a | 2094 | if (s->size != 0 && s != htab->srelplt) |
b34976b6 | 2095 | relocs = TRUE; |
ec338859 | 2096 | |
0451c93c MS |
2097 | /* We use the reloc_count field as a counter if we need |
2098 | to copy relocs into the output file. */ | |
2099 | s->reloc_count = 0; | |
2100 | } | |
2101 | else | |
a85d7ed0 NC |
2102 | { |
2103 | /* It's not one of our sections, so don't allocate space. */ | |
2104 | continue; | |
2105 | } | |
2106 | ||
eea6121a | 2107 | if (s->size == 0) |
a85d7ed0 | 2108 | { |
0451c93c MS |
2109 | /* If we don't need this section, strip it from the |
2110 | output file. This is to handle .rela.bss and | |
2111 | .rela.plt. We must create it in | |
2112 | create_dynamic_sections, because it must be created | |
2113 | before the linker maps input sections to output | |
2114 | sections. The linker does that before | |
2115 | adjust_dynamic_symbol is called, and it is that | |
2116 | function which decides whether anything needs to go | |
2117 | into these sections. */ | |
2118 | ||
8423293d | 2119 | s->flags |= SEC_EXCLUDE; |
a85d7ed0 NC |
2120 | continue; |
2121 | } | |
2122 | ||
c456f082 AM |
2123 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2124 | continue; | |
2125 | ||
0451c93c MS |
2126 | /* Allocate memory for the section contents. We use bfd_zalloc |
2127 | here in case unused entries are not reclaimed before the | |
2128 | section's contents are written out. This should not happen, | |
2129 | but this way if it does, we get a R_390_NONE reloc instead | |
2130 | of garbage. */ | |
eea6121a | 2131 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
0451c93c | 2132 | if (s->contents == NULL) |
b34976b6 | 2133 | return FALSE; |
a85d7ed0 NC |
2134 | } |
2135 | ||
0451c93c | 2136 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2137 | { |
2138 | /* Add some entries to the .dynamic section. We fill in the | |
2139 | values later, in elf_s390_finish_dynamic_sections, but we | |
2140 | must add the entries now so that we get the correct size for | |
2141 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2142 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2143 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2144 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2145 | |
36af4a4e | 2146 | if (info->executable) |
a85d7ed0 | 2147 | { |
dc810e39 | 2148 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2149 | return FALSE; |
a85d7ed0 NC |
2150 | } |
2151 | ||
eea6121a | 2152 | if (htab->splt->size != 0) |
a85d7ed0 | 2153 | { |
dc810e39 AM |
2154 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2155 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2156 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2157 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2158 | return FALSE; |
a85d7ed0 NC |
2159 | } |
2160 | ||
2161 | if (relocs) | |
947216bf AM |
2162 | { |
2163 | if (!add_dynamic_entry (DT_RELA, 0) | |
2164 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2165 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2166 | return FALSE; |
ec338859 | 2167 | |
0451c93c MS |
2168 | /* If any dynamic relocs apply to a read-only section, |
2169 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2170 | if ((info->flags & DF_TEXTREL) == 0) |
2171 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2172 | (PTR) info); | |
ec338859 | 2173 | |
0451c93c MS |
2174 | if ((info->flags & DF_TEXTREL) != 0) |
2175 | { | |
2176 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2177 | return FALSE; |
0451c93c | 2178 | } |
a85d7ed0 NC |
2179 | } |
2180 | } | |
dc810e39 | 2181 | #undef add_dynamic_entry |
a85d7ed0 | 2182 | |
b34976b6 | 2183 | return TRUE; |
a85d7ed0 NC |
2184 | } |
2185 | ||
69fc87f1 MS |
2186 | /* Return the base VMA address which should be subtracted from real addresses |
2187 | when resolving @dtpoff relocation. | |
2188 | This is PT_TLS segment p_vaddr. */ | |
2189 | ||
2190 | static bfd_vma | |
2191 | dtpoff_base (info) | |
2192 | struct bfd_link_info *info; | |
2193 | { | |
e1918d23 AM |
2194 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2195 | if (elf_hash_table (info)->tls_sec == NULL) | |
69fc87f1 | 2196 | return 0; |
e1918d23 | 2197 | return elf_hash_table (info)->tls_sec->vma; |
69fc87f1 MS |
2198 | } |
2199 | ||
2200 | /* Return the relocation value for @tpoff relocation | |
2201 | if STT_TLS virtual address is ADDRESS. */ | |
2202 | ||
2203 | static bfd_vma | |
2204 | tpoff (info, address) | |
2205 | struct bfd_link_info *info; | |
2206 | bfd_vma address; | |
2207 | { | |
e1918d23 | 2208 | struct elf_link_hash_table *htab = elf_hash_table (info); |
69fc87f1 | 2209 | |
e1918d23 AM |
2210 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2211 | if (htab->tls_sec == NULL) | |
69fc87f1 | 2212 | return 0; |
e1918d23 | 2213 | return htab->tls_size + htab->tls_sec->vma - address; |
69fc87f1 MS |
2214 | } |
2215 | ||
2216 | /* Complain if TLS instruction relocation is against an invalid | |
2217 | instruction. */ | |
2218 | ||
2219 | static void | |
2220 | invalid_tls_insn (input_bfd, input_section, rel) | |
2221 | bfd *input_bfd; | |
2222 | asection *input_section; | |
2223 | Elf_Internal_Rela *rel; | |
2224 | { | |
2225 | reloc_howto_type *howto; | |
2226 | ||
2227 | howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); | |
2228 | (*_bfd_error_handler) | |
d003868e AM |
2229 | (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), |
2230 | input_bfd, | |
2231 | input_section, | |
69fc87f1 MS |
2232 | (long) rel->r_offset, |
2233 | howto->name); | |
2234 | } | |
2235 | ||
a85d7ed0 NC |
2236 | /* Relocate a 390 ELF section. */ |
2237 | ||
b34976b6 | 2238 | static bfd_boolean |
a85d7ed0 NC |
2239 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2240 | contents, relocs, local_syms, local_sections) | |
2241 | bfd *output_bfd; | |
2242 | struct bfd_link_info *info; | |
2243 | bfd *input_bfd; | |
2244 | asection *input_section; | |
2245 | bfd_byte *contents; | |
2246 | Elf_Internal_Rela *relocs; | |
2247 | Elf_Internal_Sym *local_syms; | |
2248 | asection **local_sections; | |
2249 | { | |
0451c93c | 2250 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2251 | Elf_Internal_Shdr *symtab_hdr; |
2252 | struct elf_link_hash_entry **sym_hashes; | |
2253 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2254 | Elf_Internal_Rela *rel; |
2255 | Elf_Internal_Rela *relend; | |
2256 | ||
1049f94e | 2257 | if (info->relocatable) |
b34976b6 | 2258 | return TRUE; |
b491616a | 2259 | |
0451c93c | 2260 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2261 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2262 | sym_hashes = elf_sym_hashes (input_bfd); | |
2263 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2264 | ||
a85d7ed0 NC |
2265 | rel = relocs; |
2266 | relend = relocs + input_section->reloc_count; | |
2267 | for (; rel < relend; rel++) | |
2268 | { | |
5236c819 | 2269 | unsigned int r_type; |
a85d7ed0 NC |
2270 | reloc_howto_type *howto; |
2271 | unsigned long r_symndx; | |
2272 | struct elf_link_hash_entry *h; | |
2273 | Elf_Internal_Sym *sym; | |
2274 | asection *sec; | |
0451c93c | 2275 | bfd_vma off; |
a85d7ed0 | 2276 | bfd_vma relocation; |
b34976b6 | 2277 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2278 | bfd_reloc_status_type r; |
69fc87f1 | 2279 | int tls_type; |
a85d7ed0 NC |
2280 | |
2281 | r_type = ELF64_R_TYPE (rel->r_info); | |
0451c93c | 2282 | if (r_type == (int) R_390_GNU_VTINHERIT |
947216bf AM |
2283 | || r_type == (int) R_390_GNU_VTENTRY) |
2284 | continue; | |
5236c819 | 2285 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2286 | { |
2287 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2288 | return FALSE; |
a85d7ed0 | 2289 | } |
a85d7ed0 | 2290 | |
b491616a | 2291 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2292 | r_symndx = ELF64_R_SYM (rel->r_info); |
5236c819 MS |
2293 | |
2294 | /* This is a final link. */ | |
a85d7ed0 NC |
2295 | h = NULL; |
2296 | sym = NULL; | |
2297 | sec = NULL; | |
b34976b6 | 2298 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2299 | if (r_symndx < symtab_hdr->sh_info) |
2300 | { | |
2301 | sym = local_syms + r_symndx; | |
2302 | sec = local_sections[r_symndx]; | |
8517fae7 | 2303 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
a85d7ed0 NC |
2304 | } |
2305 | else | |
2306 | { | |
560e09e9 | 2307 | bfd_boolean warned ATTRIBUTE_UNUSED; |
0451c93c | 2308 | |
b2a8e766 AM |
2309 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2310 | r_symndx, symtab_hdr, sym_hashes, | |
2311 | h, sec, relocation, | |
2312 | unresolved_reloc, warned); | |
a85d7ed0 NC |
2313 | } |
2314 | ||
2315 | switch (r_type) | |
2316 | { | |
5236c819 MS |
2317 | case R_390_GOTPLT12: |
2318 | case R_390_GOTPLT16: | |
bd1ea41b | 2319 | case R_390_GOTPLT20: |
5236c819 MS |
2320 | case R_390_GOTPLT32: |
2321 | case R_390_GOTPLT64: | |
2322 | case R_390_GOTPLTENT: | |
2323 | /* There are three cases for a GOTPLT relocation. 1) The | |
2324 | relocation is against the jump slot entry of a plt that | |
2325 | will get emitted to the output file. 2) The relocation | |
2326 | is against the jump slot of a plt entry that has been | |
2327 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2328 | as replacement. 3) The relocation is against a local symbol. | |
2329 | Cases 2) and 3) are the same as the GOT relocation code | |
2330 | so we just have to test for case 1 and fall through for | |
2331 | the other two. */ | |
2332 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2333 | { | |
2334 | bfd_vma plt_index; | |
2335 | ||
2336 | /* Calc. index no. | |
2337 | Current offset - size first entry / entry size. */ | |
2338 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2339 | PLT_ENTRY_SIZE; | |
26e41594 | 2340 | |
5236c819 MS |
2341 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2342 | addr & GOT addr. */ | |
2343 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2344 | unresolved_reloc = FALSE; | |
2345 | ||
2346 | if (r_type == R_390_GOTPLTENT) | |
26e41594 | 2347 | relocation += htab->sgot->output_section->vma; |
5236c819 MS |
2348 | break; |
2349 | } | |
2350 | /* Fall through. */ | |
2351 | ||
947216bf AM |
2352 | case R_390_GOT12: |
2353 | case R_390_GOT16: | |
bd1ea41b | 2354 | case R_390_GOT20: |
947216bf AM |
2355 | case R_390_GOT32: |
2356 | case R_390_GOT64: | |
2357 | case R_390_GOTENT: | |
2358 | /* Relocation is to the entry for this symbol in the global | |
2359 | offset table. */ | |
0451c93c MS |
2360 | if (htab->sgot == NULL) |
2361 | abort (); | |
a85d7ed0 | 2362 | |
947216bf AM |
2363 | if (h != NULL) |
2364 | { | |
b34976b6 | 2365 | bfd_boolean dyn; |
a85d7ed0 | 2366 | |
947216bf | 2367 | off = h->got.offset; |
0451c93c | 2368 | dyn = htab->elf.dynamic_sections_created; |
4ec72bde | 2369 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
947216bf AM |
2370 | || (info->shared |
2371 | && (info->symbolic | |
0451c93c | 2372 | || h->dynindx == -1 |
f5385ebf AM |
2373 | || h->forced_local) |
2374 | && h->def_regular) | |
82058a73 MS |
2375 | || (ELF_ST_VISIBILITY (h->other) |
2376 | && h->root.type == bfd_link_hash_undefweak)) | |
947216bf AM |
2377 | { |
2378 | /* This is actually a static link, or it is a | |
2379 | -Bsymbolic link and the symbol is defined | |
2380 | locally, or the symbol was forced to be local | |
2381 | because of a version file. We must initialize | |
2382 | this entry in the global offset table. Since the | |
2383 | offset must always be a multiple of 2, we use the | |
2384 | least significant bit to record whether we have | |
2385 | initialized it already. | |
2386 | ||
2387 | When doing a dynamic link, we create a .rel.got | |
2388 | relocation entry to initialize the value. This | |
2389 | is done in the finish_dynamic_symbol routine. */ | |
2390 | if ((off & 1) != 0) | |
2391 | off &= ~1; | |
2392 | else | |
2393 | { | |
a85d7ed0 | 2394 | bfd_put_64 (output_bfd, relocation, |
0451c93c | 2395 | htab->sgot->contents + off); |
947216bf AM |
2396 | h->got.offset |= 1; |
2397 | } | |
2398 | } | |
0451c93c | 2399 | else |
b34976b6 | 2400 | unresolved_reloc = FALSE; |
947216bf AM |
2401 | } |
2402 | else | |
2403 | { | |
0451c93c MS |
2404 | if (local_got_offsets == NULL) |
2405 | abort (); | |
a85d7ed0 | 2406 | |
947216bf | 2407 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2408 | |
947216bf AM |
2409 | /* The offset must always be a multiple of 8. We use |
2410 | the least significant bit to record whether we have | |
2411 | already generated the necessary reloc. */ | |
2412 | if ((off & 1) != 0) | |
2413 | off &= ~1; | |
2414 | else | |
2415 | { | |
2416 | bfd_put_64 (output_bfd, relocation, | |
0451c93c | 2417 | htab->sgot->contents + off); |
a85d7ed0 | 2418 | |
947216bf AM |
2419 | if (info->shared) |
2420 | { | |
2421 | asection *s; | |
2422 | Elf_Internal_Rela outrel; | |
2423 | bfd_byte *loc; | |
a85d7ed0 | 2424 | |
947216bf AM |
2425 | s = htab->srelgot; |
2426 | if (s == NULL) | |
0451c93c | 2427 | abort (); |
a85d7ed0 | 2428 | |
947216bf AM |
2429 | outrel.r_offset = (htab->sgot->output_section->vma |
2430 | + htab->sgot->output_offset | |
2431 | + off); | |
2432 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2433 | outrel.r_addend = relocation; |
947216bf AM |
2434 | loc = s->contents; |
2435 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
2436 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2437 | } | |
a85d7ed0 | 2438 | |
947216bf AM |
2439 | local_got_offsets[r_symndx] |= 1; |
2440 | } | |
2441 | } | |
a85d7ed0 | 2442 | |
0451c93c MS |
2443 | if (off >= (bfd_vma) -2) |
2444 | abort (); | |
2445 | ||
2446 | relocation = htab->sgot->output_offset + off; | |
2447 | ||
ae9a127f NC |
2448 | /* For @GOTENT the relocation is against the offset between |
2449 | the instruction and the symbols entry in the GOT and not | |
2450 | between the start of the GOT and the symbols entry. We | |
2451 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2452 | if ( r_type == R_390_GOTENT |
2453 | || r_type == R_390_GOTPLTENT) | |
0451c93c | 2454 | relocation += htab->sgot->output_section->vma; |
a85d7ed0 | 2455 | |
947216bf | 2456 | break; |
99c79b2e | 2457 | |
5236c819 MS |
2458 | case R_390_GOTOFF16: |
2459 | case R_390_GOTOFF32: | |
2460 | case R_390_GOTOFF64: | |
947216bf AM |
2461 | /* Relocation is relative to the start of the global offset |
2462 | table. */ | |
a85d7ed0 | 2463 | |
947216bf AM |
2464 | /* Note that sgot->output_offset is not involved in this |
2465 | calculation. We always want the start of .got. If we | |
2466 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2467 | permitted by the ABI, we might have to change this | |
2468 | calculation. */ | |
2469 | relocation -= htab->sgot->output_section->vma; | |
947216bf | 2470 | break; |
a85d7ed0 | 2471 | |
947216bf | 2472 | case R_390_GOTPC: |
a85d7ed0 | 2473 | case R_390_GOTPCDBL: |
947216bf AM |
2474 | /* Use global offset table as symbol value. */ |
2475 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2476 | unresolved_reloc = FALSE; |
947216bf | 2477 | break; |
a85d7ed0 | 2478 | |
947216bf AM |
2479 | case R_390_PLT16DBL: |
2480 | case R_390_PLT32: | |
2481 | case R_390_PLT32DBL: | |
2482 | case R_390_PLT64: | |
2483 | /* Relocation is to the entry for this symbol in the | |
2484 | procedure linkage table. */ | |
a85d7ed0 | 2485 | |
947216bf AM |
2486 | /* Resolve a PLT32 reloc against a local symbol directly, |
2487 | without using the procedure linkage table. */ | |
2488 | if (h == NULL) | |
2489 | break; | |
a85d7ed0 | 2490 | |
947216bf | 2491 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2492 | || htab->splt == NULL) |
947216bf AM |
2493 | { |
2494 | /* We didn't make a PLT entry for this symbol. This | |
2495 | happens when statically linking PIC code, or when | |
2496 | using -Bsymbolic. */ | |
2497 | break; | |
2498 | } | |
2499 | ||
2500 | relocation = (htab->splt->output_section->vma | |
2501 | + htab->splt->output_offset | |
2502 | + h->plt.offset); | |
b34976b6 | 2503 | unresolved_reloc = FALSE; |
26e41594 | 2504 | break; |
5236c819 MS |
2505 | |
2506 | case R_390_PLTOFF16: | |
2507 | case R_390_PLTOFF32: | |
2508 | case R_390_PLTOFF64: | |
26e41594 AM |
2509 | /* Relocation is to the entry for this symbol in the |
2510 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2511 | |
2512 | /* For local symbols or if we didn't make a PLT entry for | |
2513 | this symbol resolve the symbol directly. */ | |
26e41594 | 2514 | if ( h == NULL |
5236c819 MS |
2515 | || h->plt.offset == (bfd_vma) -1 |
2516 | || htab->splt == NULL) | |
2517 | { | |
2518 | relocation -= htab->sgot->output_section->vma; | |
2519 | break; | |
2520 | } | |
2521 | ||
26e41594 AM |
2522 | relocation = (htab->splt->output_section->vma |
2523 | + htab->splt->output_offset | |
2524 | + h->plt.offset | |
5236c819 MS |
2525 | - htab->sgot->output_section->vma); |
2526 | unresolved_reloc = FALSE; | |
947216bf AM |
2527 | break; |
2528 | ||
2529 | case R_390_8: | |
2530 | case R_390_16: | |
2531 | case R_390_32: | |
2532 | case R_390_64: | |
2533 | case R_390_PC16: | |
2534 | case R_390_PC16DBL: | |
2535 | case R_390_PC32: | |
a85d7ed0 | 2536 | case R_390_PC32DBL: |
947216bf | 2537 | case R_390_PC64: |
ec338859 AM |
2538 | /* r_symndx will be zero only for relocs against symbols |
2539 | from removed linkonce sections, or sections discarded by | |
2540 | a linker script. */ | |
947216bf AM |
2541 | if (r_symndx == 0 |
2542 | || (input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
2543 | break; |
2544 | ||
947216bf | 2545 | if ((info->shared |
82058a73 MS |
2546 | && (h == NULL |
2547 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2548 | || h->root.type != bfd_link_hash_undefweak) | |
0451c93c MS |
2549 | && ((r_type != R_390_PC16 |
2550 | && r_type != R_390_PC16DBL | |
2551 | && r_type != R_390_PC32 | |
2552 | && r_type != R_390_PC32DBL | |
2553 | && r_type != R_390_PC64) | |
2554 | || (h != NULL | |
1c3ff0f2 | 2555 | && !SYMBOL_REFERENCES_LOCAL (info, h)))) |
64285810 MS |
2556 | || (ELIMINATE_COPY_RELOCS |
2557 | && !info->shared | |
0451c93c MS |
2558 | && h != NULL |
2559 | && h->dynindx != -1 | |
f5385ebf AM |
2560 | && !h->non_got_ref |
2561 | && ((h->def_dynamic | |
2562 | && !h->def_regular) | |
0451c93c MS |
2563 | || h->root.type == bfd_link_hash_undefweak |
2564 | || h->root.type == bfd_link_hash_undefined))) | |
947216bf AM |
2565 | { |
2566 | Elf_Internal_Rela outrel; | |
b34976b6 | 2567 | bfd_boolean skip, relocate; |
0451c93c | 2568 | asection *sreloc; |
947216bf | 2569 | bfd_byte *loc; |
a85d7ed0 | 2570 | |
947216bf AM |
2571 | /* When generating a shared object, these relocations |
2572 | are copied into the output file to be resolved at run | |
2573 | time. */ | |
b34976b6 AM |
2574 | skip = FALSE; |
2575 | relocate = FALSE; | |
a85d7ed0 | 2576 | |
c629eae0 JJ |
2577 | outrel.r_offset = |
2578 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2579 | rel->r_offset); | |
2580 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2581 | skip = TRUE; |
0bb2d96a | 2582 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2583 | skip = TRUE, relocate = TRUE; |
a85d7ed0 | 2584 | |
947216bf AM |
2585 | outrel.r_offset += (input_section->output_section->vma |
2586 | + input_section->output_offset); | |
a85d7ed0 | 2587 | |
947216bf | 2588 | if (skip) |
0bb2d96a | 2589 | memset (&outrel, 0, sizeof outrel); |
947216bf | 2590 | else if (h != NULL |
0451c93c MS |
2591 | && h->dynindx != -1 |
2592 | && (r_type == R_390_PC16 | |
2593 | || r_type == R_390_PC16DBL | |
2594 | || r_type == R_390_PC32 | |
2595 | || r_type == R_390_PC32DBL | |
2596 | || r_type == R_390_PC64 | |
2597 | || !info->shared | |
2598 | || !info->symbolic | |
f5385ebf | 2599 | || !h->def_regular)) |
947216bf AM |
2600 | { |
2601 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
27018c3f | 2602 | outrel.r_addend = rel->r_addend; |
947216bf AM |
2603 | } |
2604 | else | |
2605 | { | |
0451c93c | 2606 | /* This symbol is local, or marked to become local. */ |
90ced0dd | 2607 | outrel.r_addend = relocation + rel->r_addend; |
b5727d75 MS |
2608 | if (r_type == R_390_64) |
2609 | { | |
2610 | relocate = TRUE; | |
2611 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
b5727d75 MS |
2612 | } |
2613 | else | |
2614 | { | |
2615 | long sindx; | |
2616 | ||
90ced0dd | 2617 | if (bfd_is_abs_section (sec)) |
b5727d75 MS |
2618 | sindx = 0; |
2619 | else if (sec == NULL || sec->owner == NULL) | |
2620 | { | |
2621 | bfd_set_error(bfd_error_bad_value); | |
2622 | return FALSE; | |
2623 | } | |
2624 | else | |
2625 | { | |
2626 | asection *osec; | |
2627 | ||
2628 | osec = sec->output_section; | |
2629 | sindx = elf_section_data (osec)->dynindx; | |
2630 | BFD_ASSERT (sindx > 0); | |
90ced0dd MS |
2631 | |
2632 | /* We are turning this relocation into one | |
2633 | against a section symbol, so subtract out | |
2634 | the output section's address but not the | |
2635 | offset of the input section in the output | |
2636 | section. */ | |
2637 | ||
2638 | outrel.r_addend -= osec->vma; | |
b5727d75 MS |
2639 | } |
2640 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
b5727d75 | 2641 | } |
0451c93c | 2642 | } |
a85d7ed0 | 2643 | |
0451c93c MS |
2644 | sreloc = elf_section_data (input_section)->sreloc; |
2645 | if (sreloc == NULL) | |
2646 | abort (); | |
2647 | ||
947216bf AM |
2648 | loc = sreloc->contents; |
2649 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2650 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
a85d7ed0 | 2651 | |
947216bf AM |
2652 | /* If this reloc is against an external symbol, we do |
2653 | not want to fiddle with the addend. Otherwise, we | |
2654 | need to include the symbol value so that it becomes | |
2655 | an addend for the dynamic reloc. */ | |
2656 | if (! relocate) | |
2657 | continue; | |
2658 | } | |
a85d7ed0 | 2659 | |
947216bf | 2660 | break; |
a85d7ed0 | 2661 | |
69fc87f1 MS |
2662 | /* Relocations for tls literal pool entries. */ |
2663 | case R_390_TLS_IE64: | |
2664 | if (info->shared) | |
2665 | { | |
2666 | Elf_Internal_Rela outrel; | |
2667 | asection *sreloc; | |
2668 | bfd_byte *loc; | |
2669 | ||
2670 | outrel.r_offset = rel->r_offset | |
2671 | + input_section->output_section->vma | |
2672 | + input_section->output_offset; | |
2673 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
2674 | sreloc = elf_section_data (input_section)->sreloc; | |
2675 | if (sreloc == NULL) | |
2676 | abort (); | |
2677 | loc = sreloc->contents; | |
2678 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2679 | bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); | |
2680 | } | |
ae9a127f | 2681 | /* Fall through. */ |
69fc87f1 MS |
2682 | |
2683 | case R_390_TLS_GD64: | |
2684 | case R_390_TLS_GOTIE64: | |
2685 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2686 | tls_type = GOT_UNKNOWN; | |
2687 | if (h == NULL && local_got_offsets) | |
2688 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2689 | else if (h != NULL) | |
2690 | { | |
2691 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2692 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2693 | r_type = R_390_TLS_LE64; | |
2694 | } | |
2695 | if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) | |
2696 | r_type = R_390_TLS_IE64; | |
2697 | ||
2698 | if (r_type == R_390_TLS_LE64) | |
2699 | { | |
2700 | /* This relocation gets optimized away by the local exec | |
2701 | access optimization. */ | |
2702 | BFD_ASSERT (! unresolved_reloc); | |
2703 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2704 | contents + rel->r_offset); | |
2705 | continue; | |
2706 | } | |
2707 | ||
2708 | if (htab->sgot == NULL) | |
2709 | abort (); | |
2710 | ||
2711 | if (h != NULL) | |
2712 | off = h->got.offset; | |
2713 | else | |
2714 | { | |
2715 | if (local_got_offsets == NULL) | |
2716 | abort (); | |
2717 | ||
2718 | off = local_got_offsets[r_symndx]; | |
2719 | } | |
2720 | ||
2721 | emit_tls_relocs: | |
2722 | ||
2723 | if ((off & 1) != 0) | |
2724 | off &= ~1; | |
26e41594 | 2725 | else |
69fc87f1 MS |
2726 | { |
2727 | Elf_Internal_Rela outrel; | |
2728 | bfd_byte *loc; | |
2729 | int dr_type, indx; | |
2730 | ||
2731 | if (htab->srelgot == NULL) | |
2732 | abort (); | |
2733 | ||
2734 | outrel.r_offset = (htab->sgot->output_section->vma | |
2735 | + htab->sgot->output_offset + off); | |
2736 | ||
2737 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2738 | if (r_type == R_390_TLS_GD64) | |
2739 | dr_type = R_390_TLS_DTPMOD; | |
2740 | else | |
2741 | dr_type = R_390_TLS_TPOFF; | |
2742 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2743 | outrel.r_addend = relocation - dtpoff_base (info); | |
2744 | else | |
2745 | outrel.r_addend = 0; | |
2746 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2747 | loc = htab->srelgot->contents; | |
2748 | loc += htab->srelgot->reloc_count++ | |
2749 | * sizeof (Elf64_External_Rela); | |
2750 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2751 | ||
2752 | if (r_type == R_390_TLS_GD64) | |
2753 | { | |
2754 | if (indx == 0) | |
2755 | { | |
2756 | BFD_ASSERT (! unresolved_reloc); | |
2757 | bfd_put_64 (output_bfd, | |
2758 | relocation - dtpoff_base (info), | |
2759 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2760 | } | |
2761 | else | |
2762 | { | |
2763 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); | |
2764 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2765 | outrel.r_addend = 0; | |
2766 | htab->srelgot->reloc_count++; | |
2767 | loc += sizeof (Elf64_External_Rela); | |
2768 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2769 | } | |
2770 | } | |
2771 | ||
2772 | if (h != NULL) | |
2773 | h->got.offset |= 1; | |
2774 | else | |
2775 | local_got_offsets[r_symndx] |= 1; | |
2776 | } | |
2777 | ||
2778 | if (off >= (bfd_vma) -2) | |
2779 | abort (); | |
2780 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2781 | { | |
2782 | relocation = htab->sgot->output_offset + off; | |
2783 | if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) | |
2784 | relocation += htab->sgot->output_section->vma; | |
2785 | unresolved_reloc = FALSE; | |
2786 | } | |
2787 | else | |
2788 | { | |
2789 | bfd_put_64 (output_bfd, htab->sgot->output_offset + off, | |
2790 | contents + rel->r_offset); | |
2791 | continue; | |
2792 | } | |
2793 | break; | |
2794 | ||
2795 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 2796 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
2797 | case R_390_TLS_IEENT: |
2798 | if (h == NULL) | |
2799 | { | |
2800 | if (local_got_offsets == NULL) | |
2801 | abort(); | |
2802 | off = local_got_offsets[r_symndx]; | |
2803 | if (info->shared) | |
2804 | goto emit_tls_relocs; | |
2805 | } | |
2806 | else | |
2807 | { | |
2808 | off = h->got.offset; | |
2809 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2810 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2811 | goto emit_tls_relocs; | |
2812 | } | |
2813 | ||
2814 | if (htab->sgot == NULL) | |
2815 | abort (); | |
2816 | ||
2817 | BFD_ASSERT (! unresolved_reloc); | |
2818 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2819 | htab->sgot->contents + off); | |
2820 | relocation = htab->sgot->output_offset + off; | |
2821 | if (r_type == R_390_TLS_IEENT) | |
2822 | relocation += htab->sgot->output_section->vma; | |
2823 | unresolved_reloc = FALSE; | |
2824 | break; | |
2825 | ||
2826 | case R_390_TLS_LDM64: | |
2827 | if (! info->shared) | |
2828 | /* The literal pool entry this relocation refers to gets ignored | |
2829 | by the optimized code of the local exec model. Do nothing | |
2830 | and the value will turn out zero. */ | |
2831 | continue; | |
2832 | ||
2833 | if (htab->sgot == NULL) | |
2834 | abort (); | |
2835 | ||
2836 | off = htab->tls_ldm_got.offset; | |
2837 | if (off & 1) | |
2838 | off &= ~1; | |
2839 | else | |
2840 | { | |
2841 | Elf_Internal_Rela outrel; | |
2842 | bfd_byte *loc; | |
2843 | ||
2844 | if (htab->srelgot == NULL) | |
2845 | abort (); | |
2846 | ||
2847 | outrel.r_offset = (htab->sgot->output_section->vma | |
2848 | + htab->sgot->output_offset + off); | |
2849 | ||
2850 | bfd_put_64 (output_bfd, 0, | |
2851 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2852 | outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); | |
2853 | outrel.r_addend = 0; | |
2854 | loc = htab->srelgot->contents; | |
2855 | loc += htab->srelgot->reloc_count++ | |
2856 | * sizeof (Elf64_External_Rela); | |
2857 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2858 | htab->tls_ldm_got.offset |= 1; | |
2859 | } | |
2860 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2861 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2862 | break; |
2863 | ||
2864 | case R_390_TLS_LE64: | |
2865 | if (info->shared) | |
2866 | { | |
2867 | /* Linking a shared library with non-fpic code requires | |
2868 | a R_390_TLS_TPOFF relocation. */ | |
2869 | Elf_Internal_Rela outrel; | |
2870 | asection *sreloc; | |
2871 | bfd_byte *loc; | |
2872 | int indx; | |
2873 | ||
2874 | outrel.r_offset = rel->r_offset | |
2875 | + input_section->output_section->vma | |
2876 | + input_section->output_offset; | |
2877 | if (h != NULL && h->dynindx != -1) | |
2878 | indx = h->dynindx; | |
2879 | else | |
2880 | indx = 0; | |
2881 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); | |
2882 | if (indx == 0) | |
2883 | outrel.r_addend = relocation - dtpoff_base (info); | |
2884 | else | |
2885 | outrel.r_addend = 0; | |
2886 | sreloc = elf_section_data (input_section)->sreloc; | |
2887 | if (sreloc == NULL) | |
2888 | abort (); | |
2889 | loc = sreloc->contents; | |
2890 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2891 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2892 | } | |
2893 | else | |
2894 | { | |
2895 | BFD_ASSERT (! unresolved_reloc); | |
2896 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2897 | contents + rel->r_offset); | |
2898 | } | |
2899 | continue; | |
2900 | ||
2901 | case R_390_TLS_LDO64: | |
2902 | if (info->shared || (input_section->flags & SEC_CODE) == 0) | |
2903 | relocation -= dtpoff_base (info); | |
2904 | else | |
2905 | /* When converting LDO to LE, we must negate. */ | |
2906 | relocation = -tpoff (info, relocation); | |
2907 | break; | |
2908 | ||
2909 | /* Relocations for tls instructions. */ | |
2910 | case R_390_TLS_LOAD: | |
2911 | case R_390_TLS_GDCALL: | |
2912 | case R_390_TLS_LDCALL: | |
2913 | tls_type = GOT_UNKNOWN; | |
2914 | if (h == NULL && local_got_offsets) | |
2915 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2916 | else if (h != NULL) | |
2917 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2918 | ||
2919 | if (tls_type == GOT_TLS_GD) | |
2920 | continue; | |
2921 | ||
2922 | if (r_type == R_390_TLS_LOAD) | |
2923 | { | |
2924 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2925 | { | |
2926 | /* IE->LE transition. Four valid cases: | |
2927 | lg %rx,(0,%ry) -> sllg %rx,%ry,0 | |
2928 | lg %rx,(%ry,0) -> sllg %rx,%ry,0 | |
2929 | lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 | |
2930 | lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2931 | unsigned int insn0, insn1, ry; | |
2932 | ||
2933 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2934 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2935 | if (insn1 != 0x0004) | |
2936 | invalid_tls_insn (input_bfd, input_section, rel); | |
2937 | ry = 0; | |
2938 | if ((insn0 & 0xff00f000) == 0xe3000000) | |
2939 | /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ | |
2940 | ry = (insn0 & 0x000f0000); | |
2941 | else if ((insn0 & 0xff0f0000) == 0xe3000000) | |
2942 | /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ | |
2943 | ry = (insn0 & 0x0000f000) << 4; | |
2944 | else if ((insn0 & 0xff00f000) == 0xe300c000) | |
2945 | /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ | |
2946 | ry = (insn0 & 0x000f0000); | |
2947 | else if ((insn0 & 0xff0f0000) == 0xe30c0000) | |
2948 | /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2949 | ry = (insn0 & 0x0000f000) << 4; | |
2950 | else | |
2951 | invalid_tls_insn (input_bfd, input_section, rel); | |
2952 | insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; | |
2953 | insn1 = 0x000d; | |
2954 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2955 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2956 | } | |
2957 | } | |
2958 | else if (r_type == R_390_TLS_GDCALL) | |
2959 | { | |
2960 | unsigned int insn0, insn1; | |
2961 | ||
2962 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2963 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2964 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2965 | invalid_tls_insn (input_bfd, input_section, rel); | |
2966 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2967 | { | |
2968 | /* GD->LE transition. | |
2969 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2970 | insn0 = 0xc0040000; | |
2971 | insn1 = 0x0000; | |
2972 | } | |
2973 | else | |
2974 | { | |
2975 | /* GD->IE transition. | |
2976 | brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ | |
2977 | insn0 = 0xe322c000; | |
2978 | insn1 = 0x0004; | |
2979 | } | |
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 | else if (r_type == R_390_TLS_LDCALL) | |
2984 | { | |
2985 | if (!info->shared) | |
2986 | { | |
2987 | unsigned int insn0, insn1; | |
2988 | ||
2989 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2990 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2991 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2992 | invalid_tls_insn (input_bfd, input_section, rel); | |
2993 | /* LD->LE transition. | |
2994 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2995 | insn0 = 0xc0040000; | |
2996 | insn1 = 0x0000; | |
2997 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2998 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2999 | } | |
3000 | } | |
3001 | continue; | |
3002 | ||
947216bf AM |
3003 | default: |
3004 | break; | |
3005 | } | |
a85d7ed0 | 3006 | |
239e1f3a AM |
3007 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3008 | because such sections are not SEC_ALLOC and thus ld.so will | |
3009 | not process them. */ | |
0451c93c | 3010 | if (unresolved_reloc |
239e1f3a | 3011 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3012 | && h->def_dynamic)) |
0451c93c | 3013 | (*_bfd_error_handler) |
843fe662 | 3014 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3015 | input_bfd, |
3016 | input_section, | |
0451c93c | 3017 | (long) rel->r_offset, |
843fe662 | 3018 | howto->name, |
0451c93c MS |
3019 | h->root.root.string); |
3020 | ||
bd1ea41b MS |
3021 | if (r_type == R_390_20 |
3022 | || r_type == R_390_GOT20 | |
3023 | || r_type == R_390_GOTPLT20 | |
3024 | || r_type == R_390_TLS_GOTIE20) | |
3025 | { | |
3026 | relocation += rel->r_addend; | |
3027 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; | |
3028 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3029 | contents, rel->r_offset, | |
3030 | relocation, 0); | |
3031 | } | |
3032 | else | |
3033 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
a85d7ed0 NC |
3034 | contents, rel->r_offset, |
3035 | relocation, rel->r_addend); | |
3036 | ||
3037 | if (r != bfd_reloc_ok) | |
3038 | { | |
0451c93c | 3039 | const char *name; |
ec338859 | 3040 | |
0451c93c MS |
3041 | if (h != NULL) |
3042 | name = h->root.root.string; | |
3043 | else | |
a85d7ed0 | 3044 | { |
0451c93c MS |
3045 | name = bfd_elf_string_from_elf_section (input_bfd, |
3046 | symtab_hdr->sh_link, | |
3047 | sym->st_name); | |
3048 | if (name == NULL) | |
b34976b6 | 3049 | return FALSE; |
0451c93c MS |
3050 | if (*name == '\0') |
3051 | name = bfd_section_name (input_bfd, sec); | |
3052 | } | |
ec338859 | 3053 | |
0451c93c MS |
3054 | if (r == bfd_reloc_overflow) |
3055 | { | |
ec338859 | 3056 | |
0451c93c | 3057 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3058 | (info, (h ? &h->root : NULL), name, howto->name, |
3059 | (bfd_vma) 0, input_bfd, input_section, | |
3060 | rel->r_offset))) | |
b34976b6 | 3061 | return FALSE; |
0451c93c MS |
3062 | } |
3063 | else | |
3064 | { | |
3065 | (*_bfd_error_handler) | |
d003868e AM |
3066 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3067 | input_bfd, input_section, | |
0451c93c | 3068 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3069 | return FALSE; |
a85d7ed0 NC |
3070 | } |
3071 | } | |
3072 | } | |
3073 | ||
b34976b6 | 3074 | return TRUE; |
a85d7ed0 NC |
3075 | } |
3076 | ||
3077 | /* Finish up dynamic symbol handling. We set the contents of various | |
3078 | dynamic sections here. */ | |
3079 | ||
b34976b6 | 3080 | static bfd_boolean |
a85d7ed0 NC |
3081 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
3082 | bfd *output_bfd; | |
3083 | struct bfd_link_info *info; | |
3084 | struct elf_link_hash_entry *h; | |
3085 | Elf_Internal_Sym *sym; | |
3086 | { | |
0451c93c | 3087 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 | 3088 | |
0451c93c | 3089 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
3090 | |
3091 | if (h->plt.offset != (bfd_vma) -1) | |
3092 | { | |
a85d7ed0 | 3093 | bfd_vma plt_index; |
0451c93c MS |
3094 | bfd_vma got_offset; |
3095 | Elf_Internal_Rela rela; | |
947216bf | 3096 | bfd_byte *loc; |
a85d7ed0 NC |
3097 | |
3098 | /* This symbol has an entry in the procedure linkage table. Set | |
947216bf | 3099 | it up. */ |
a85d7ed0 | 3100 | |
0451c93c MS |
3101 | if (h->dynindx == -1 |
3102 | || htab->splt == NULL | |
3103 | || htab->sgotplt == NULL | |
3104 | || htab->srelplt == NULL) | |
3105 | abort (); | |
a85d7ed0 | 3106 | |
99c79b2e | 3107 | /* Calc. index no. |
947216bf | 3108 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
3109 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
3110 | ||
3111 | /* Offset in GOT is PLT index plus GOT headers(3) times 8, | |
947216bf | 3112 | addr & GOT addr. */ |
a85d7ed0 NC |
3113 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3114 | ||
3115 | /* Fill in the blueprint of a PLT. */ | |
0451c93c MS |
3116 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
3117 | htab->splt->contents + h->plt.offset); | |
3118 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
3119 | htab->splt->contents + h->plt.offset + 4); | |
3120 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
3121 | htab->splt->contents + h->plt.offset + 8); | |
3122 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
3123 | htab->splt->contents + h->plt.offset + 12); | |
3124 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
3125 | htab->splt->contents + h->plt.offset + 16); | |
3126 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5, | |
3127 | htab->splt->contents + h->plt.offset + 20); | |
3128 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6, | |
3129 | htab->splt->contents + h->plt.offset + 24); | |
3130 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7, | |
3131 | htab->splt->contents + h->plt.offset + 28); | |
a85d7ed0 NC |
3132 | /* Fixup the relative address to the GOT entry */ |
3133 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3134 | (htab->sgotplt->output_section->vma + |
3135 | htab->sgotplt->output_offset + got_offset | |
3136 | - (htab->splt->output_section->vma + h->plt.offset))/2, | |
3137 | htab->splt->contents + h->plt.offset + 2); | |
a85d7ed0 NC |
3138 | /* Fixup the relative branch to PLT 0 */ |
3139 | bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + | |
3140 | (PLT_ENTRY_SIZE * plt_index) + 22)/2, | |
0451c93c | 3141 | htab->splt->contents + h->plt.offset + 24); |
a85d7ed0 NC |
3142 | /* Fixup offset into symbol table */ |
3143 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), | |
0451c93c | 3144 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3145 | |
3146 | /* Fill in the entry in the global offset table. | |
947216bf | 3147 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3148 | bfd_put_64 (output_bfd, |
0451c93c MS |
3149 | (htab->splt->output_section->vma |
3150 | + htab->splt->output_offset | |
a85d7ed0 NC |
3151 | + h->plt.offset |
3152 | + 14), | |
0451c93c | 3153 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3154 | |
0451c93c MS |
3155 | /* Fill in the entry in the .rela.plt section. */ |
3156 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3157 | + htab->sgotplt->output_offset | |
3158 | + got_offset); | |
3159 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3160 | rela.r_addend = 0; | |
947216bf | 3161 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
0451c93c | 3162 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 | 3163 | |
f5385ebf | 3164 | if (!h->def_regular) |
a85d7ed0 NC |
3165 | { |
3166 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3167 | the .plt section. Leave the value alone. This is a clue |
3168 | for the dynamic linker, to make function pointer | |
3169 | comparisons work between an application and shared | |
3170 | library. */ | |
a85d7ed0 NC |
3171 | sym->st_shndx = SHN_UNDEF; |
3172 | } | |
3173 | } | |
3174 | ||
69fc87f1 MS |
3175 | if (h->got.offset != (bfd_vma) -1 |
3176 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3177 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3178 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3179 | { |
a85d7ed0 | 3180 | Elf_Internal_Rela rela; |
947216bf | 3181 | bfd_byte *loc; |
a85d7ed0 NC |
3182 | |
3183 | /* This symbol has an entry in the global offset table. Set it | |
947216bf | 3184 | up. */ |
0451c93c MS |
3185 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3186 | abort (); | |
a85d7ed0 | 3187 | |
0451c93c MS |
3188 | rela.r_offset = (htab->sgot->output_section->vma |
3189 | + htab->sgot->output_offset | |
dc810e39 | 3190 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3191 | |
3192 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3193 | symbol is defined locally or was forced to be local because | |
3194 | of a version file, we just want to emit a RELATIVE reloc. | |
3195 | The entry in the global offset table will already have been | |
3196 | initialized in the relocate_section function. */ | |
0451c93c MS |
3197 | if (info->shared |
3198 | && (info->symbolic | |
3199 | || h->dynindx == -1 | |
f5385ebf AM |
3200 | || h->forced_local) |
3201 | && h->def_regular) | |
947216bf | 3202 | { |
0451c93c | 3203 | BFD_ASSERT((h->got.offset & 1) != 0); |
947216bf AM |
3204 | rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
3205 | rela.r_addend = (h->root.u.def.value | |
3206 | + h->root.u.def.section->output_section->vma | |
3207 | + h->root.u.def.section->output_offset); | |
3208 | } | |
a85d7ed0 NC |
3209 | else |
3210 | { | |
3211 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3212 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3213 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); |
947216bf AM |
3214 | rela.r_addend = 0; |
3215 | } | |
a85d7ed0 | 3216 | |
947216bf AM |
3217 | loc = htab->srelgot->contents; |
3218 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3219 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3220 | } |
3221 | ||
f5385ebf | 3222 | if (h->needs_copy) |
a85d7ed0 | 3223 | { |
a85d7ed0 | 3224 | Elf_Internal_Rela rela; |
947216bf | 3225 | bfd_byte *loc; |
a85d7ed0 NC |
3226 | |
3227 | /* This symbols needs a copy reloc. Set it up. */ | |
3228 | ||
0451c93c MS |
3229 | if (h->dynindx == -1 |
3230 | || (h->root.type != bfd_link_hash_defined | |
3231 | && h->root.type != bfd_link_hash_defweak) | |
3232 | || htab->srelbss == NULL) | |
3233 | abort (); | |
a85d7ed0 NC |
3234 | |
3235 | rela.r_offset = (h->root.u.def.value | |
3236 | + h->root.u.def.section->output_section->vma | |
3237 | + h->root.u.def.section->output_offset); | |
3238 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); | |
3239 | rela.r_addend = 0; | |
947216bf AM |
3240 | loc = htab->srelbss->contents; |
3241 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3242 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3243 | } |
3244 | ||
3245 | /* Mark some specially defined symbols as absolute. */ | |
3246 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3247 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3248 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3249 | sym->st_shndx = SHN_ABS; | |
3250 | ||
b34976b6 | 3251 | return TRUE; |
a85d7ed0 NC |
3252 | } |
3253 | ||
0451c93c MS |
3254 | /* Used to decide how to sort relocs in an optimal manner for the |
3255 | dynamic linker, before writing them out. */ | |
3256 | ||
3257 | static enum elf_reloc_type_class | |
3258 | elf_s390_reloc_type_class (rela) | |
3259 | const Elf_Internal_Rela *rela; | |
3260 | { | |
3261 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3262 | { | |
3263 | case R_390_RELATIVE: | |
3264 | return reloc_class_relative; | |
3265 | case R_390_JMP_SLOT: | |
3266 | return reloc_class_plt; | |
3267 | case R_390_COPY: | |
3268 | return reloc_class_copy; | |
3269 | default: | |
3270 | return reloc_class_normal; | |
3271 | } | |
3272 | } | |
3273 | ||
a85d7ed0 NC |
3274 | /* Finish up the dynamic sections. */ |
3275 | ||
b34976b6 | 3276 | static bfd_boolean |
a85d7ed0 NC |
3277 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3278 | bfd *output_bfd; | |
3279 | struct bfd_link_info *info; | |
3280 | { | |
0451c93c | 3281 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3282 | bfd *dynobj; |
3283 | asection *sdyn; | |
a85d7ed0 | 3284 | |
0451c93c MS |
3285 | htab = elf_s390_hash_table (info); |
3286 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3287 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3288 | ||
0451c93c | 3289 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3290 | { |
a85d7ed0 NC |
3291 | Elf64_External_Dyn *dyncon, *dynconend; |
3292 | ||
0451c93c MS |
3293 | if (sdyn == NULL || htab->sgot == NULL) |
3294 | abort (); | |
a85d7ed0 NC |
3295 | |
3296 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 3297 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
a85d7ed0 NC |
3298 | for (; dyncon < dynconend; dyncon++) |
3299 | { | |
3300 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3301 | asection *s; |
ec338859 | 3302 | |
a85d7ed0 | 3303 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3304 | |
a85d7ed0 NC |
3305 | switch (dyn.d_tag) |
3306 | { | |
3307 | default: | |
0451c93c | 3308 | continue; |
ec338859 | 3309 | |
a85d7ed0 | 3310 | case DT_PLTGOT: |
0451c93c MS |
3311 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3312 | break; | |
ec338859 | 3313 | |
a85d7ed0 | 3314 | case DT_JMPREL: |
0451c93c | 3315 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 | 3316 | break; |
ec338859 | 3317 | |
a85d7ed0 | 3318 | case DT_PLTRELSZ: |
0451c93c | 3319 | s = htab->srelplt->output_section; |
eea6121a | 3320 | dyn.d_un.d_val = s->size; |
a85d7ed0 | 3321 | break; |
ec338859 | 3322 | |
a85d7ed0 NC |
3323 | case DT_RELASZ: |
3324 | /* The procedure linkage table relocs (DT_JMPREL) should | |
3325 | not be included in the overall relocs (DT_RELA). | |
3326 | Therefore, we override the DT_RELASZ entry here to | |
3327 | make it not include the JMPREL relocs. Since the | |
3328 | linker script arranges for .rela.plt to follow all | |
3329 | other relocation sections, we don't have to worry | |
3330 | about changing the DT_RELA entry. */ | |
0451c93c | 3331 | s = htab->srelplt->output_section; |
eea6121a | 3332 | dyn.d_un.d_val -= s->size; |
a85d7ed0 NC |
3333 | break; |
3334 | } | |
0451c93c MS |
3335 | |
3336 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3337 | } |
3338 | ||
3339 | /* Fill in the special first entry in the procedure linkage table. */ | |
eea6121a | 3340 | if (htab->splt && htab->splt->size > 0) |
a85d7ed0 NC |
3341 | { |
3342 | /* fill in blueprint for plt 0 entry */ | |
0451c93c MS |
3343 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0, |
3344 | htab->splt->contents ); | |
3345 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3346 | htab->splt->contents +4 ); | |
3347 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3348 | htab->splt->contents +12 ); | |
3349 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3350 | htab->splt->contents +16 ); | |
3351 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3352 | htab->splt->contents +20 ); | |
3353 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6, | |
3354 | htab->splt->contents + 24); | |
3355 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7, | |
3356 | htab->splt->contents + 28 ); | |
a85d7ed0 NC |
3357 | /* Fixup relative address to start of GOT */ |
3358 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3359 | (htab->sgotplt->output_section->vma + |
3360 | htab->sgotplt->output_offset | |
3361 | - htab->splt->output_section->vma - 6)/2, | |
3362 | htab->splt->contents + 8); | |
a85d7ed0 | 3363 | } |
0451c93c MS |
3364 | elf_section_data (htab->splt->output_section) |
3365 | ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; | |
a85d7ed0 NC |
3366 | } |
3367 | ||
0451c93c | 3368 | if (htab->sgotplt) |
a85d7ed0 | 3369 | { |
0451c93c | 3370 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3371 | if (htab->sgotplt->size > 0) |
0451c93c MS |
3372 | { |
3373 | bfd_put_64 (output_bfd, | |
3374 | (sdyn == NULL ? (bfd_vma) 0 | |
3375 | : sdyn->output_section->vma + sdyn->output_offset), | |
3376 | htab->sgotplt->contents); | |
3377 | /* One entry for shared object struct ptr. */ | |
3378 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3379 | /* One entry for _dl_runtime_resolve. */ | |
3380 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12); | |
3381 | } | |
a85d7ed0 | 3382 | |
0451c93c MS |
3383 | elf_section_data (htab->sgot->output_section) |
3384 | ->this_hdr.sh_entsize = 8; | |
3385 | } | |
b34976b6 | 3386 | return TRUE; |
a85d7ed0 NC |
3387 | } |
3388 | ||
4c45e5c9 JJ |
3389 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3390 | or (bfd_vma) -1 if it should not be included. */ | |
3391 | ||
3392 | static bfd_vma | |
3393 | elf_s390_plt_sym_val (bfd_vma i, const asection *plt, | |
3394 | const arelent *rel ATTRIBUTE_UNUSED) | |
3395 | { | |
3396 | return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; | |
3397 | } | |
3398 | ||
3399 | ||
ae9a127f NC |
3400 | /* Why was the hash table entry size definition changed from |
3401 | ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and | |
3402 | this is the only reason for the s390_elf64_size_info structure. */ | |
a85d7ed0 NC |
3403 | |
3404 | const struct elf_size_info s390_elf64_size_info = | |
3405 | { | |
3406 | sizeof (Elf64_External_Ehdr), | |
3407 | sizeof (Elf64_External_Phdr), | |
3408 | sizeof (Elf64_External_Shdr), | |
3409 | sizeof (Elf64_External_Rel), | |
3410 | sizeof (Elf64_External_Rela), | |
3411 | sizeof (Elf64_External_Sym), | |
3412 | sizeof (Elf64_External_Dyn), | |
3413 | sizeof (Elf_External_Note), | |
ae9a127f NC |
3414 | 8, /* hash-table entry size. */ |
3415 | 1, /* internal relocations per external relocations. */ | |
3416 | 64, /* arch_size. */ | |
45d6a902 | 3417 | 3, /* log_file_align. */ |
a85d7ed0 NC |
3418 | ELFCLASS64, EV_CURRENT, |
3419 | bfd_elf64_write_out_phdrs, | |
3420 | bfd_elf64_write_shdrs_and_ehdr, | |
3421 | bfd_elf64_write_relocs, | |
73ff0d56 | 3422 | bfd_elf64_swap_symbol_in, |
a85d7ed0 NC |
3423 | bfd_elf64_swap_symbol_out, |
3424 | bfd_elf64_slurp_reloc_table, | |
3425 | bfd_elf64_slurp_symbol_table, | |
3426 | bfd_elf64_swap_dyn_in, | |
3427 | bfd_elf64_swap_dyn_out, | |
947216bf AM |
3428 | bfd_elf64_swap_reloc_in, |
3429 | bfd_elf64_swap_reloc_out, | |
3430 | bfd_elf64_swap_reloca_in, | |
3431 | bfd_elf64_swap_reloca_out | |
a85d7ed0 NC |
3432 | }; |
3433 | ||
3434 | #define TARGET_BIG_SYM bfd_elf64_s390_vec | |
3435 | #define TARGET_BIG_NAME "elf64-s390" | |
3436 | #define ELF_ARCH bfd_arch_s390 | |
3437 | #define ELF_MACHINE_CODE EM_S390 | |
3438 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3439 | #define ELF_MAXPAGESIZE 0x1000 | |
3440 | ||
3441 | #define elf_backend_size_info s390_elf64_size_info | |
3442 | ||
3443 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3444 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3445 | #define elf_backend_want_got_plt 1 |
3446 | #define elf_backend_plt_readonly 1 | |
3447 | #define elf_backend_want_plt_sym 0 | |
3448 | #define elf_backend_got_header_size 24 | |
b491616a | 3449 | #define elf_backend_rela_normal 1 |
a85d7ed0 NC |
3450 | |
3451 | #define elf_info_to_howto elf_s390_info_to_howto | |
3452 | ||
a85d7ed0 NC |
3453 | #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name |
3454 | #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3455 | #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
3456 | ||
3457 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
3458 | #define elf_backend_check_relocs elf_s390_check_relocs | |
0451c93c MS |
3459 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3460 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3461 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3462 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
3463 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook | |
3464 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3465 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
a85d7ed0 NC |
3466 | #define elf_backend_relocate_section elf_s390_relocate_section |
3467 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections | |
29c2fb7c | 3468 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
4c45e5c9 | 3469 | #define elf_backend_plt_sym_val elf_s390_plt_sym_val |
a85d7ed0 | 3470 | |
69fc87f1 MS |
3471 | #define bfd_elf64_mkobject elf_s390_mkobject |
3472 | #define elf_backend_object_p elf_s390_object_p | |
a85d7ed0 NC |
3473 | |
3474 | #include "elf64-target.h" |