Commit | Line | Data |
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a85d7ed0 | 1 | /* IBM S/390-specific support for 64-bit ELF |
ae9a127f | 2 | Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
a85d7ed0 NC |
3 | Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "bfdlink.h" | |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | ||
28 | static reloc_howto_type *elf_s390_reloc_type_lookup | |
29 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
30 | static void elf_s390_info_to_howto | |
31 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
b34976b6 | 32 | static bfd_boolean elf_s390_is_local_label_name |
0451c93c MS |
33 | PARAMS ((bfd *, const char *)); |
34 | static struct bfd_hash_entry *link_hash_newfunc | |
a85d7ed0 NC |
35 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
36 | static struct bfd_link_hash_table *elf_s390_link_hash_table_create | |
37 | PARAMS ((bfd *)); | |
b34976b6 | 38 | static bfd_boolean create_got_section |
0451c93c | 39 | PARAMS((bfd *, struct bfd_link_info *)); |
b34976b6 | 40 | static bfd_boolean elf_s390_create_dynamic_sections |
0451c93c MS |
41 | PARAMS((bfd *, struct bfd_link_info *)); |
42 | static void elf_s390_copy_indirect_symbol | |
b48fa14c AM |
43 | PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, |
44 | struct elf_link_hash_entry *)); | |
b34976b6 | 45 | static bfd_boolean elf_s390_check_relocs |
a85d7ed0 NC |
46 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
47 | const Elf_Internal_Rela *)); | |
99c79b2e | 48 | static asection *elf_s390_gc_mark_hook |
1e2f5b6e | 49 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
99c79b2e | 50 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 51 | static bfd_boolean elf_s390_gc_sweep_hook |
99c79b2e AJ |
52 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
53 | const Elf_Internal_Rela *)); | |
5236c819 MS |
54 | struct elf_s390_link_hash_entry; |
55 | static void elf_s390_adjust_gotplt | |
56 | PARAMS ((struct elf_s390_link_hash_entry *)); | |
b34976b6 | 57 | static bfd_boolean elf_s390_adjust_dynamic_symbol |
a85d7ed0 | 58 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 59 | static bfd_boolean allocate_dynrelocs |
0451c93c | 60 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 61 | static bfd_boolean readonly_dynrelocs |
0451c93c | 62 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 63 | static bfd_boolean elf_s390_size_dynamic_sections |
a85d7ed0 | 64 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 65 | static bfd_boolean elf_s390_relocate_section |
a85d7ed0 NC |
66 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
67 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 68 | static bfd_boolean elf_s390_finish_dynamic_symbol |
a85d7ed0 NC |
69 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
70 | Elf_Internal_Sym *)); | |
0451c93c MS |
71 | static enum elf_reloc_type_class elf_s390_reloc_type_class |
72 | PARAMS ((const Elf_Internal_Rela *)); | |
b34976b6 | 73 | static bfd_boolean elf_s390_finish_dynamic_sections |
a85d7ed0 | 74 | PARAMS ((bfd *, struct bfd_link_info *)); |
69fc87f1 MS |
75 | static bfd_boolean elf_s390_mkobject |
76 | PARAMS ((bfd *)); | |
5236c819 MS |
77 | static bfd_boolean elf_s390_object_p |
78 | PARAMS ((bfd *)); | |
69fc87f1 MS |
79 | static int elf_s390_tls_transition |
80 | PARAMS ((struct bfd_link_info *, int, int)); | |
81 | static bfd_reloc_status_type s390_tls_reloc | |
82 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
83 | static bfd_vma dtpoff_base | |
84 | PARAMS ((struct bfd_link_info *)); | |
85 | static bfd_vma tpoff | |
86 | PARAMS ((struct bfd_link_info *, bfd_vma)); | |
87 | static void invalid_tls_insn | |
88 | PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); | |
a85d7ed0 | 89 | |
a85d7ed0 NC |
90 | #include "elf/s390.h" |
91 | ||
92 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
93 | from smaller values. Start with zero, widen, *then* decrement. */ | |
94 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
95 | ||
96 | /* The relocation "howto" table. */ | |
97 | static reloc_howto_type elf_howto_table[] = | |
98 | { | |
99 | HOWTO (R_390_NONE, /* type */ | |
100 | 0, /* rightshift */ | |
101 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
102 | 0, /* bitsize */ | |
b34976b6 | 103 | FALSE, /* pc_relative */ |
a85d7ed0 NC |
104 | 0, /* bitpos */ |
105 | complain_overflow_dont, /* complain_on_overflow */ | |
106 | bfd_elf_generic_reloc, /* special_function */ | |
107 | "R_390_NONE", /* name */ | |
b34976b6 | 108 | FALSE, /* partial_inplace */ |
a85d7ed0 NC |
109 | 0, /* src_mask */ |
110 | 0, /* dst_mask */ | |
b34976b6 AM |
111 | FALSE), /* pcrel_offset */ |
112 | ||
5236c819 MS |
113 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
114 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), | |
115 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
116 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), | |
117 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
118 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), | |
119 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), | |
121 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
122 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), | |
123 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
124 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), | |
125 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
126 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), | |
127 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
128 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), | |
129 | HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
130 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), | |
131 | HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
132 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), | |
133 | HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
134 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), | |
135 | HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
136 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), | |
137 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
138 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), | |
139 | HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
140 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), | |
141 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
142 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), | |
143 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
144 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), | |
145 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
146 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), | |
147 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
148 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), | |
149 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
150 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), | |
151 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
152 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), | |
153 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
154 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), | |
155 | HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
156 | bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), | |
157 | HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
158 | bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), | |
159 | HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
160 | bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), | |
161 | HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
162 | bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), | |
163 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
164 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), | |
165 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
166 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
167 | HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
168 | bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
169 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
170 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), | |
171 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
172 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), | |
173 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
174 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), | |
175 | HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
176 | bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), | |
177 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
178 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), | |
179 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
180 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
181 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
182 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), | |
183 | HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
184 | bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
69fc87f1 MS |
185 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
186 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), | |
187 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
188 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), | |
189 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
190 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), | |
191 | EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ | |
192 | HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
193 | bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), | |
194 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
195 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), | |
196 | EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ | |
197 | HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
198 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), | |
199 | EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ | |
200 | HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
201 | bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), | |
202 | EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ | |
203 | HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
204 | bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), | |
205 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
206 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), | |
207 | EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ | |
208 | HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
209 | bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), | |
210 | EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ | |
211 | HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
212 | bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), | |
213 | HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
214 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), | |
215 | HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
216 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
217 | HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
218 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
a85d7ed0 NC |
219 | }; |
220 | ||
221 | /* GNU extension to record C++ vtable hierarchy. */ | |
222 | static reloc_howto_type elf64_s390_vtinherit_howto = | |
b34976b6 | 223 | HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
a85d7ed0 | 224 | static reloc_howto_type elf64_s390_vtentry_howto = |
b34976b6 | 225 | 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 |
226 | |
227 | static reloc_howto_type * | |
228 | elf_s390_reloc_type_lookup (abfd, code) | |
229 | bfd *abfd ATTRIBUTE_UNUSED; | |
230 | bfd_reloc_code_real_type code; | |
231 | { | |
0451c93c MS |
232 | switch (code) |
233 | { | |
234 | case BFD_RELOC_NONE: | |
235 | return &elf_howto_table[(int) R_390_NONE]; | |
236 | case BFD_RELOC_8: | |
237 | return &elf_howto_table[(int) R_390_8]; | |
238 | case BFD_RELOC_390_12: | |
239 | return &elf_howto_table[(int) R_390_12]; | |
240 | case BFD_RELOC_16: | |
241 | return &elf_howto_table[(int) R_390_16]; | |
242 | case BFD_RELOC_32: | |
243 | return &elf_howto_table[(int) R_390_32]; | |
244 | case BFD_RELOC_CTOR: | |
245 | return &elf_howto_table[(int) R_390_32]; | |
246 | case BFD_RELOC_32_PCREL: | |
247 | return &elf_howto_table[(int) R_390_PC32]; | |
248 | case BFD_RELOC_390_GOT12: | |
249 | return &elf_howto_table[(int) R_390_GOT12]; | |
250 | case BFD_RELOC_32_GOT_PCREL: | |
251 | return &elf_howto_table[(int) R_390_GOT32]; | |
252 | case BFD_RELOC_390_PLT32: | |
253 | return &elf_howto_table[(int) R_390_PLT32]; | |
254 | case BFD_RELOC_390_COPY: | |
255 | return &elf_howto_table[(int) R_390_COPY]; | |
256 | case BFD_RELOC_390_GLOB_DAT: | |
257 | return &elf_howto_table[(int) R_390_GLOB_DAT]; | |
258 | case BFD_RELOC_390_JMP_SLOT: | |
259 | return &elf_howto_table[(int) R_390_JMP_SLOT]; | |
260 | case BFD_RELOC_390_RELATIVE: | |
261 | return &elf_howto_table[(int) R_390_RELATIVE]; | |
262 | case BFD_RELOC_32_GOTOFF: | |
5236c819 | 263 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
0451c93c MS |
264 | case BFD_RELOC_390_GOTPC: |
265 | return &elf_howto_table[(int) R_390_GOTPC]; | |
266 | case BFD_RELOC_390_GOT16: | |
267 | return &elf_howto_table[(int) R_390_GOT16]; | |
268 | case BFD_RELOC_16_PCREL: | |
269 | return &elf_howto_table[(int) R_390_PC16]; | |
270 | case BFD_RELOC_390_PC16DBL: | |
271 | return &elf_howto_table[(int) R_390_PC16DBL]; | |
272 | case BFD_RELOC_390_PLT16DBL: | |
273 | return &elf_howto_table[(int) R_390_PLT16DBL]; | |
0451c93c MS |
274 | case BFD_RELOC_390_PC32DBL: |
275 | return &elf_howto_table[(int) R_390_PC32DBL]; | |
276 | case BFD_RELOC_390_PLT32DBL: | |
277 | return &elf_howto_table[(int) R_390_PLT32DBL]; | |
278 | case BFD_RELOC_390_GOTPCDBL: | |
279 | return &elf_howto_table[(int) R_390_GOTPCDBL]; | |
280 | case BFD_RELOC_64: | |
281 | return &elf_howto_table[(int) R_390_64]; | |
282 | case BFD_RELOC_64_PCREL: | |
283 | return &elf_howto_table[(int) R_390_PC64]; | |
284 | case BFD_RELOC_390_GOT64: | |
285 | return &elf_howto_table[(int) R_390_GOT64]; | |
286 | case BFD_RELOC_390_PLT64: | |
287 | return &elf_howto_table[(int) R_390_PLT64]; | |
288 | case BFD_RELOC_390_GOTENT: | |
289 | return &elf_howto_table[(int) R_390_GOTENT]; | |
5236c819 MS |
290 | case BFD_RELOC_16_GOTOFF: |
291 | return &elf_howto_table[(int) R_390_GOTOFF16]; | |
292 | case BFD_RELOC_390_GOTOFF64: | |
293 | return &elf_howto_table[(int) R_390_GOTOFF64]; | |
294 | case BFD_RELOC_390_GOTPLT12: | |
295 | return &elf_howto_table[(int) R_390_GOTPLT12]; | |
296 | case BFD_RELOC_390_GOTPLT16: | |
297 | return &elf_howto_table[(int) R_390_GOTPLT16]; | |
298 | case BFD_RELOC_390_GOTPLT32: | |
299 | return &elf_howto_table[(int) R_390_GOTPLT32]; | |
300 | case BFD_RELOC_390_GOTPLT64: | |
301 | return &elf_howto_table[(int) R_390_GOTPLT64]; | |
302 | case BFD_RELOC_390_GOTPLTENT: | |
303 | return &elf_howto_table[(int) R_390_GOTPLTENT]; | |
304 | case BFD_RELOC_390_PLTOFF16: | |
305 | return &elf_howto_table[(int) R_390_PLTOFF16]; | |
306 | case BFD_RELOC_390_PLTOFF32: | |
307 | return &elf_howto_table[(int) R_390_PLTOFF32]; | |
308 | case BFD_RELOC_390_PLTOFF64: | |
309 | return &elf_howto_table[(int) R_390_PLTOFF64]; | |
69fc87f1 MS |
310 | case BFD_RELOC_390_TLS_LOAD: |
311 | return &elf_howto_table[(int) R_390_TLS_LOAD]; | |
312 | case BFD_RELOC_390_TLS_GDCALL: | |
313 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; | |
314 | case BFD_RELOC_390_TLS_LDCALL: | |
315 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; | |
316 | case BFD_RELOC_390_TLS_GD64: | |
317 | return &elf_howto_table[(int) R_390_TLS_GD64]; | |
318 | case BFD_RELOC_390_TLS_GOTIE12: | |
319 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; | |
320 | case BFD_RELOC_390_TLS_GOTIE64: | |
321 | return &elf_howto_table[(int) R_390_TLS_GOTIE64]; | |
322 | case BFD_RELOC_390_TLS_LDM64: | |
323 | return &elf_howto_table[(int) R_390_TLS_LDM64]; | |
324 | case BFD_RELOC_390_TLS_IE64: | |
325 | return &elf_howto_table[(int) R_390_TLS_IE64]; | |
326 | case BFD_RELOC_390_TLS_IEENT: | |
327 | return &elf_howto_table[(int) R_390_TLS_IEENT]; | |
328 | case BFD_RELOC_390_TLS_LE64: | |
329 | return &elf_howto_table[(int) R_390_TLS_LE64]; | |
330 | case BFD_RELOC_390_TLS_LDO64: | |
331 | return &elf_howto_table[(int) R_390_TLS_LDO64]; | |
332 | case BFD_RELOC_390_TLS_DTPMOD: | |
333 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; | |
334 | case BFD_RELOC_390_TLS_DTPOFF: | |
335 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; | |
336 | case BFD_RELOC_390_TLS_TPOFF: | |
337 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; | |
5236c819 MS |
338 | case BFD_RELOC_VTABLE_INHERIT: |
339 | return &elf64_s390_vtinherit_howto; | |
340 | case BFD_RELOC_VTABLE_ENTRY: | |
341 | return &elf64_s390_vtentry_howto; | |
0451c93c MS |
342 | default: |
343 | break; | |
344 | } | |
a85d7ed0 NC |
345 | return 0; |
346 | } | |
347 | ||
348 | /* We need to use ELF64_R_TYPE so we have our own copy of this function, | |
349 | and elf64-s390.c has its own copy. */ | |
350 | ||
351 | static void | |
352 | elf_s390_info_to_howto (abfd, cache_ptr, dst) | |
353 | bfd *abfd ATTRIBUTE_UNUSED; | |
354 | arelent *cache_ptr; | |
355 | Elf_Internal_Rela *dst; | |
356 | { | |
357 | switch (ELF64_R_TYPE(dst->r_info)) | |
358 | { | |
359 | case R_390_GNU_VTINHERIT: | |
360 | cache_ptr->howto = &elf64_s390_vtinherit_howto; | |
361 | break; | |
362 | ||
363 | case R_390_GNU_VTENTRY: | |
364 | cache_ptr->howto = &elf64_s390_vtentry_howto; | |
365 | break; | |
366 | ||
367 | default: | |
368 | BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max); | |
369 | cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)]; | |
99c79b2e | 370 | } |
a85d7ed0 NC |
371 | } |
372 | ||
69fc87f1 MS |
373 | /* A relocation function which doesn't do anything. */ |
374 | static bfd_reloc_status_type | |
375 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 376 | output_bfd, error_message) |
69fc87f1 MS |
377 | bfd *abfd ATTRIBUTE_UNUSED; |
378 | arelent *reloc_entry; | |
379 | asymbol *symbol ATTRIBUTE_UNUSED; | |
380 | PTR data ATTRIBUTE_UNUSED; | |
381 | asection *input_section; | |
382 | bfd *output_bfd; | |
383 | char **error_message ATTRIBUTE_UNUSED; | |
384 | { | |
385 | if (output_bfd) | |
386 | reloc_entry->address += input_section->output_offset; | |
387 | return bfd_reloc_ok; | |
388 | } | |
389 | ||
b34976b6 | 390 | static bfd_boolean |
a85d7ed0 NC |
391 | elf_s390_is_local_label_name (abfd, name) |
392 | bfd *abfd; | |
393 | const char *name; | |
394 | { | |
395 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 396 | return TRUE; |
a85d7ed0 NC |
397 | |
398 | return _bfd_elf_is_local_label_name (abfd, name); | |
399 | } | |
400 | ||
401 | /* Functions for the 390 ELF linker. */ | |
402 | ||
403 | /* The name of the dynamic interpreter. This is put in the .interp | |
404 | section. */ | |
405 | ||
406 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
407 | ||
a85d7ed0 NC |
408 | /* The size in bytes of the first entry in the procedure linkage table. */ |
409 | #define PLT_FIRST_ENTRY_SIZE 32 | |
410 | /* The size in bytes of an entry in the procedure linkage table. */ | |
99c79b2e | 411 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
412 | |
413 | #define GOT_ENTRY_SIZE 8 | |
414 | ||
415 | /* The first three entries in a procedure linkage table are reserved, | |
416 | and the initial contents are unimportant (we zero them out). | |
417 | Subsequent entries look like this. See the SVR4 ABI 386 | |
418 | supplement to see how this works. */ | |
419 | ||
420 | /* For the s390, simple addr offset can only be 0 - 4096. | |
421 | To use the full 16777216 TB address space, several instructions | |
422 | are needed to load an address in a register and execute | |
423 | a branch( or just saving the address) | |
424 | ||
99c79b2e | 425 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
426 | |
427 | /* The first 3 words in the GOT are then reserved. | |
428 | Word 0 is the address of the dynamic table. | |
429 | Word 1 is a pointer to a structure describing the object | |
430 | Word 2 is used to point to the loader entry address. | |
431 | ||
432 | The code for PLT entries looks like this: | |
433 | ||
434 | The GOT holds the address in the PLT to be executed. | |
435 | The loader then gets: | |
436 | 24(15) = Pointer to the structure describing the object. | |
99c79b2e | 437 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
438 | The loader must then find the module where the function is |
439 | and insert the address in the GOT. | |
440 | ||
441 | PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 | |
442 | LG 1,0(1) # 6 bytes Load address from GOT in r1 | |
443 | BCR 15,1 # 2 bytes Jump to address | |
444 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
445 | LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 | |
446 | BRCL 15,-x # 6 bytes Jump to start of PLT | |
447 | .long ? # 4 bytes offset into symbol table | |
448 | ||
449 | Total = 32 bytes per PLT entry | |
450 | Fixup at offset 2: relative address to GOT entry | |
451 | Fixup at offset 22: relative branch to PLT0 | |
452 | Fixup at offset 28: 32 bit offset into symbol table | |
453 | ||
454 | A 32 bit offset into the symbol table is enough. It allows for symbol | |
455 | tables up to a size of 2 gigabyte. A single dynamic object (the main | |
456 | program, any shared library) is limited to 4GB in size and I want to see | |
457 | the program that manages to have a symbol table of more than 2 GB with a | |
458 | total size of at max 4 GB. */ | |
459 | ||
dc810e39 AM |
460 | #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000 |
461 | #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310 | |
462 | #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004 | |
463 | #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10 | |
464 | #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c | |
465 | #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4 | |
466 | #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000 | |
467 | #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000 | |
a85d7ed0 NC |
468 | |
469 | /* The first PLT entry pushes the offset into the symbol table | |
470 | from R1 onto the stack at 8(15) and the loader object info | |
471 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
472 | ||
473 | /* The first entry in the PLT: | |
474 | ||
475 | PLT0: | |
476 | STG 1,56(15) # r1 contains the offset into the symbol table | |
477 | LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table | |
478 | MVC 48(8,15),8(1) # move loader ino (object struct address) to stack | |
479 | LG 1,16(1) # get entry address of loader | |
480 | BCR 15,1 # jump to loader | |
481 | ||
482 | Fixup at offset 8: relative address to start of GOT. */ | |
483 | ||
dc810e39 AM |
484 | #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038 |
485 | #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010 | |
486 | #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000 | |
487 | #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030 | |
488 | #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310 | |
489 | #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004 | |
490 | #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700 | |
491 | #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700 | |
a85d7ed0 NC |
492 | |
493 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
494 | decides to copy as dynamic relocs in check_relocs for each symbol. |
495 | This is so that it can later discard them if they are found to be | |
496 | unnecessary. We store the information in a field extending the | |
497 | regular ELF linker hash table. */ | |
a85d7ed0 | 498 | |
0451c93c | 499 | struct elf_s390_dyn_relocs |
a85d7ed0 | 500 | { |
0451c93c MS |
501 | struct elf_s390_dyn_relocs *next; |
502 | ||
503 | /* The input section of the reloc. */ | |
504 | asection *sec; | |
505 | ||
506 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 507 | bfd_size_type count; |
0451c93c MS |
508 | |
509 | /* Number of pc-relative relocs copied for the input section. */ | |
510 | bfd_size_type pc_count; | |
a85d7ed0 NC |
511 | }; |
512 | ||
513 | /* s390 ELF linker hash entry. */ | |
514 | ||
515 | struct elf_s390_link_hash_entry | |
516 | { | |
0451c93c | 517 | struct elf_link_hash_entry elf; |
a85d7ed0 | 518 | |
0451c93c MS |
519 | /* Track dynamic relocs copied for this symbol. */ |
520 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
521 | |
522 | /* Number of GOTPLT references for a function. */ | |
523 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
524 | |
525 | #define GOT_UNKNOWN 0 | |
526 | #define GOT_NORMAL 1 | |
527 | #define GOT_TLS_GD 2 | |
528 | #define GOT_TLS_IE 3 | |
529 | #define GOT_TLS_IE_NLT 3 | |
530 | unsigned char tls_type; | |
a85d7ed0 NC |
531 | }; |
532 | ||
69fc87f1 MS |
533 | #define elf_s390_hash_entry(ent) \ |
534 | ((struct elf_s390_link_hash_entry *)(ent)) | |
535 | ||
536 | struct elf_s390_obj_tdata | |
537 | { | |
538 | struct elf_obj_tdata root; | |
539 | ||
540 | /* tls_type for each local got entry. */ | |
541 | char *local_got_tls_type; | |
542 | }; | |
543 | ||
544 | #define elf_s390_tdata(abfd) \ | |
545 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
546 | ||
547 | #define elf_s390_local_got_tls_type(abfd) \ | |
548 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
549 | ||
550 | static bfd_boolean | |
551 | elf_s390_mkobject (abfd) | |
552 | bfd *abfd; | |
553 | { | |
554 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
555 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
556 | if (abfd->tdata.any == NULL) | |
557 | return FALSE; | |
558 | return TRUE; | |
559 | } | |
560 | ||
561 | static bfd_boolean | |
562 | elf_s390_object_p (abfd) | |
563 | bfd *abfd; | |
564 | { | |
565 | /* Allocate our special target data. */ | |
566 | struct elf_s390_obj_tdata *new_tdata; | |
567 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
568 | new_tdata = bfd_zalloc (abfd, amt); | |
569 | if (new_tdata == NULL) | |
570 | return FALSE; | |
571 | new_tdata->root = *abfd->tdata.elf_obj_data; | |
572 | abfd->tdata.any = new_tdata; | |
573 | /* Set the right machine number for an s390 elf32 file. */ | |
574 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); | |
575 | } | |
576 | ||
a85d7ed0 NC |
577 | /* s390 ELF linker hash table. */ |
578 | ||
579 | struct elf_s390_link_hash_table | |
580 | { | |
0451c93c | 581 | struct elf_link_hash_table elf; |
a85d7ed0 | 582 | |
0451c93c MS |
583 | /* Short-cuts to get to dynamic linker sections. */ |
584 | asection *sgot; | |
585 | asection *sgotplt; | |
586 | asection *srelgot; | |
587 | asection *splt; | |
588 | asection *srelplt; | |
589 | asection *sdynbss; | |
590 | asection *srelbss; | |
ec338859 | 591 | |
69fc87f1 MS |
592 | union { |
593 | bfd_signed_vma refcount; | |
594 | bfd_vma offset; | |
595 | } tls_ldm_got; | |
596 | ||
ec338859 AM |
597 | /* Small local sym to section mapping cache. */ |
598 | struct sym_sec_cache sym_sec; | |
0451c93c | 599 | }; |
a85d7ed0 NC |
600 | |
601 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
602 | ||
603 | #define elf_s390_hash_table(p) \ | |
604 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
605 | ||
606 | /* Create an entry in an s390 ELF linker hash table. */ | |
607 | ||
608 | static struct bfd_hash_entry * | |
0451c93c | 609 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
610 | struct bfd_hash_entry *entry; |
611 | struct bfd_hash_table *table; | |
612 | const char *string; | |
613 | { | |
a85d7ed0 NC |
614 | /* Allocate the structure if it has not already been allocated by a |
615 | subclass. */ | |
0451c93c MS |
616 | if (entry == NULL) |
617 | { | |
618 | entry = bfd_hash_allocate (table, | |
619 | sizeof (struct elf_s390_link_hash_entry)); | |
620 | if (entry == NULL) | |
621 | return entry; | |
622 | } | |
a85d7ed0 NC |
623 | |
624 | /* Call the allocation method of the superclass. */ | |
0451c93c MS |
625 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
626 | if (entry != NULL) | |
a85d7ed0 | 627 | { |
0451c93c MS |
628 | struct elf_s390_link_hash_entry *eh; |
629 | ||
630 | eh = (struct elf_s390_link_hash_entry *) entry; | |
631 | eh->dyn_relocs = NULL; | |
5236c819 | 632 | eh->gotplt_refcount = 0; |
69fc87f1 | 633 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
634 | } |
635 | ||
0451c93c | 636 | return entry; |
a85d7ed0 NC |
637 | } |
638 | ||
639 | /* Create an s390 ELF linker hash table. */ | |
640 | ||
641 | static struct bfd_link_hash_table * | |
642 | elf_s390_link_hash_table_create (abfd) | |
643 | bfd *abfd; | |
644 | { | |
645 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 646 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 647 | |
e2d34d7d | 648 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 649 | if (ret == NULL) |
a85d7ed0 NC |
650 | return NULL; |
651 | ||
0451c93c | 652 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
a85d7ed0 | 653 | { |
e2d34d7d | 654 | free (ret); |
a85d7ed0 NC |
655 | return NULL; |
656 | } | |
657 | ||
0451c93c MS |
658 | ret->sgot = NULL; |
659 | ret->sgotplt = NULL; | |
660 | ret->srelgot = NULL; | |
661 | ret->splt = NULL; | |
662 | ret->srelplt = NULL; | |
663 | ret->sdynbss = NULL; | |
664 | ret->srelbss = NULL; | |
69fc87f1 | 665 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 666 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
667 | |
668 | return &ret->elf.root; | |
669 | } | |
670 | ||
671 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
672 | shortcuts to them in our hash table. */ | |
673 | ||
b34976b6 | 674 | static bfd_boolean |
0451c93c MS |
675 | create_got_section (dynobj, info) |
676 | bfd *dynobj; | |
677 | struct bfd_link_info *info; | |
678 | { | |
679 | struct elf_s390_link_hash_table *htab; | |
680 | ||
681 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 682 | return FALSE; |
0451c93c MS |
683 | |
684 | htab = elf_s390_hash_table (info); | |
685 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
686 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
687 | if (!htab->sgot || !htab->sgotplt) | |
688 | abort (); | |
689 | ||
690 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
691 | if (htab->srelgot == NULL | |
692 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
693 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
694 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
695 | | SEC_READONLY)) | |
99881371 | 696 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
697 | return FALSE; |
698 | return TRUE; | |
0451c93c MS |
699 | } |
700 | ||
701 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
702 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
703 | hash table. */ | |
704 | ||
b34976b6 | 705 | static bfd_boolean |
0451c93c MS |
706 | elf_s390_create_dynamic_sections (dynobj, info) |
707 | bfd *dynobj; | |
708 | struct bfd_link_info *info; | |
709 | { | |
710 | struct elf_s390_link_hash_table *htab; | |
711 | ||
712 | htab = elf_s390_hash_table (info); | |
713 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 714 | return FALSE; |
0451c93c MS |
715 | |
716 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 717 | return FALSE; |
0451c93c MS |
718 | |
719 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
720 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
721 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
722 | if (!info->shared) | |
723 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
724 | ||
725 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
726 | || (!info->shared && !htab->srelbss)) | |
727 | abort (); | |
728 | ||
b34976b6 | 729 | return TRUE; |
a85d7ed0 NC |
730 | } |
731 | ||
0451c93c MS |
732 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
733 | ||
734 | static void | |
b48fa14c AM |
735 | elf_s390_copy_indirect_symbol (bed, dir, ind) |
736 | struct elf_backend_data *bed; | |
0451c93c MS |
737 | struct elf_link_hash_entry *dir, *ind; |
738 | { | |
739 | struct elf_s390_link_hash_entry *edir, *eind; | |
740 | ||
741 | edir = (struct elf_s390_link_hash_entry *) dir; | |
742 | eind = (struct elf_s390_link_hash_entry *) ind; | |
743 | ||
744 | if (eind->dyn_relocs != NULL) | |
745 | { | |
746 | if (edir->dyn_relocs != NULL) | |
747 | { | |
748 | struct elf_s390_dyn_relocs **pp; | |
749 | struct elf_s390_dyn_relocs *p; | |
750 | ||
751 | if (ind->root.type == bfd_link_hash_indirect) | |
752 | abort (); | |
753 | ||
754 | /* Add reloc counts against the weak sym to the strong sym | |
755 | list. Merge any entries against the same section. */ | |
756 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
757 | { | |
758 | struct elf_s390_dyn_relocs *q; | |
759 | ||
760 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
761 | if (q->sec == p->sec) | |
762 | { | |
763 | q->pc_count += p->pc_count; | |
764 | q->count += p->count; | |
765 | *pp = p->next; | |
766 | break; | |
767 | } | |
768 | if (q == NULL) | |
769 | pp = &p->next; | |
770 | } | |
771 | *pp = edir->dyn_relocs; | |
772 | } | |
773 | ||
774 | edir->dyn_relocs = eind->dyn_relocs; | |
775 | eind->dyn_relocs = NULL; | |
776 | } | |
777 | ||
69fc87f1 MS |
778 | if (ind->root.type == bfd_link_hash_indirect |
779 | && dir->got.refcount <= 0) | |
780 | { | |
781 | edir->tls_type = eind->tls_type; | |
782 | eind->tls_type = GOT_UNKNOWN; | |
783 | } | |
784 | ||
b48fa14c | 785 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
0451c93c | 786 | } |
a85d7ed0 | 787 | |
69fc87f1 MS |
788 | static int |
789 | elf_s390_tls_transition (info, r_type, is_local) | |
790 | struct bfd_link_info *info; | |
791 | int r_type; | |
792 | int is_local; | |
793 | { | |
794 | if (info->shared) | |
795 | return r_type; | |
796 | ||
797 | switch (r_type) | |
798 | { | |
799 | case R_390_TLS_GD64: | |
800 | case R_390_TLS_IE64: | |
801 | if (is_local) | |
802 | return R_390_TLS_LE64; | |
803 | return R_390_TLS_IE64; | |
804 | case R_390_TLS_GOTIE64: | |
805 | if (is_local) | |
806 | return R_390_TLS_LE64; | |
807 | return R_390_TLS_GOTIE64; | |
808 | case R_390_TLS_LDM64: | |
809 | return R_390_TLS_LE64; | |
810 | } | |
811 | ||
812 | return r_type; | |
813 | } | |
814 | ||
a85d7ed0 NC |
815 | /* Look through the relocs for a section during the first phase, and |
816 | allocate space in the global offset table or procedure linkage | |
817 | table. */ | |
818 | ||
b34976b6 | 819 | static bfd_boolean |
a85d7ed0 NC |
820 | elf_s390_check_relocs (abfd, info, sec, relocs) |
821 | bfd *abfd; | |
822 | struct bfd_link_info *info; | |
823 | asection *sec; | |
824 | const Elf_Internal_Rela *relocs; | |
825 | { | |
0451c93c | 826 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
827 | Elf_Internal_Shdr *symtab_hdr; |
828 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
829 | const Elf_Internal_Rela *rel; |
830 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 831 | asection *sreloc; |
5236c819 | 832 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 833 | int tls_type, old_tls_type; |
a85d7ed0 NC |
834 | |
835 | if (info->relocateable) | |
b34976b6 | 836 | return TRUE; |
a85d7ed0 | 837 | |
0451c93c | 838 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
839 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
840 | sym_hashes = elf_sym_hashes (abfd); | |
5236c819 | 841 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 842 | |
a85d7ed0 NC |
843 | sreloc = NULL; |
844 | ||
845 | rel_end = relocs + sec->reloc_count; | |
846 | for (rel = relocs; rel < rel_end; rel++) | |
847 | { | |
69fc87f1 | 848 | unsigned int r_type; |
a85d7ed0 NC |
849 | unsigned long r_symndx; |
850 | struct elf_link_hash_entry *h; | |
851 | ||
852 | r_symndx = ELF64_R_SYM (rel->r_info); | |
853 | ||
0451c93c MS |
854 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
855 | { | |
856 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
857 | bfd_archive_filename (abfd), | |
858 | r_symndx); | |
b34976b6 | 859 | return FALSE; |
0451c93c MS |
860 | } |
861 | ||
a85d7ed0 NC |
862 | if (r_symndx < symtab_hdr->sh_info) |
863 | h = NULL; | |
864 | else | |
99c79b2e | 865 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
a85d7ed0 | 866 | |
5236c819 MS |
867 | /* Create got section and local_got_refcounts array if they |
868 | are needed. */ | |
69fc87f1 MS |
869 | r_type = elf_s390_tls_transition (info, |
870 | ELF64_R_TYPE (rel->r_info), | |
871 | h == NULL); | |
872 | switch (r_type) | |
a85d7ed0 NC |
873 | { |
874 | case R_390_GOT12: | |
947216bf | 875 | case R_390_GOT16: |
a85d7ed0 NC |
876 | case R_390_GOT32: |
877 | case R_390_GOT64: | |
878 | case R_390_GOTENT: | |
5236c819 MS |
879 | case R_390_GOTPLT12: |
880 | case R_390_GOTPLT16: | |
881 | case R_390_GOTPLT32: | |
882 | case R_390_GOTPLT64: | |
883 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
884 | case R_390_TLS_GD64: |
885 | case R_390_TLS_GOTIE12: | |
886 | case R_390_TLS_GOTIE64: | |
887 | case R_390_TLS_IEENT: | |
888 | case R_390_TLS_IE64: | |
889 | case R_390_TLS_LDM64: | |
5236c819 MS |
890 | if (h == NULL |
891 | && local_got_refcounts == NULL) | |
a85d7ed0 | 892 | { |
5236c819 | 893 | bfd_size_type size; |
0451c93c | 894 | |
5236c819 | 895 | size = symtab_hdr->sh_info; |
69fc87f1 | 896 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
897 | local_got_refcounts = ((bfd_signed_vma *) |
898 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 899 | if (local_got_refcounts == NULL) |
5236c819 MS |
900 | return FALSE; |
901 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
902 | elf_s390_local_got_tls_type (abfd) |
903 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 904 | } |
5236c819 MS |
905 | /* Fall through. */ |
906 | case R_390_GOTOFF16: | |
907 | case R_390_GOTOFF32: | |
908 | case R_390_GOTOFF64: | |
0451c93c MS |
909 | case R_390_GOTPC: |
910 | case R_390_GOTPCDBL: | |
911 | if (htab->sgot == NULL) | |
912 | { | |
913 | if (htab->elf.dynobj == NULL) | |
914 | htab->elf.dynobj = abfd; | |
915 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 916 | return FALSE; |
0451c93c | 917 | } |
5236c819 MS |
918 | } |
919 | ||
69fc87f1 | 920 | switch (r_type) |
5236c819 | 921 | { |
5236c819 MS |
922 | case R_390_GOTOFF16: |
923 | case R_390_GOTOFF32: | |
924 | case R_390_GOTOFF64: | |
925 | case R_390_GOTPC: | |
926 | case R_390_GOTPCDBL: | |
927 | /* Got is created, nothing to be done. */ | |
0451c93c | 928 | break; |
ec338859 | 929 | |
947216bf | 930 | case R_390_PLT16DBL: |
a85d7ed0 NC |
931 | case R_390_PLT32: |
932 | case R_390_PLT32DBL: | |
933 | case R_390_PLT64: | |
5236c819 MS |
934 | case R_390_PLTOFF16: |
935 | case R_390_PLTOFF32: | |
936 | case R_390_PLTOFF64: | |
a85d7ed0 | 937 | /* This symbol requires a procedure linkage table entry. We |
947216bf AM |
938 | actually build the entry in adjust_dynamic_symbol, |
939 | because this might be a case of linking PIC code which is | |
940 | never referenced by a dynamic object, in which case we | |
941 | don't need to generate a procedure linkage table entry | |
942 | after all. */ | |
ec338859 | 943 | |
a85d7ed0 | 944 | /* If this is a local symbol, we resolve it directly without |
947216bf | 945 | creating a procedure linkage table entry. */ |
5236c819 MS |
946 | if (h != NULL) |
947 | { | |
948 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
949 | h->plt.refcount += 1; | |
950 | } | |
951 | break; | |
ec338859 | 952 | |
5236c819 MS |
953 | case R_390_GOTPLT12: |
954 | case R_390_GOTPLT16: | |
955 | case R_390_GOTPLT32: | |
956 | case R_390_GOTPLT64: | |
957 | case R_390_GOTPLTENT: | |
958 | /* This symbol requires either a procedure linkage table entry | |
959 | or an entry in the local got. We actually build the entry | |
960 | in adjust_dynamic_symbol because whether this is really a | |
961 | global reference can change and with it the fact if we have | |
962 | to create a plt entry or a local got entry. To be able to | |
963 | make a once global symbol a local one we have to keep track | |
964 | of the number of gotplt references that exist for this | |
965 | symbol. */ | |
966 | if (h != NULL) | |
967 | { | |
968 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
969 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
970 | h->plt.refcount += 1; | |
971 | } | |
69fc87f1 MS |
972 | else |
973 | local_got_refcounts[r_symndx] += 1; | |
974 | break; | |
975 | ||
976 | case R_390_TLS_LDM64: | |
977 | htab->tls_ldm_got.refcount += 1; | |
978 | break; | |
979 | ||
980 | case R_390_TLS_IE64: | |
981 | case R_390_TLS_GOTIE12: | |
982 | case R_390_TLS_GOTIE64: | |
983 | case R_390_TLS_IEENT: | |
984 | if (info->shared) | |
985 | info->flags |= DF_STATIC_TLS; | |
986 | /* Fall through */ | |
987 | ||
988 | case R_390_GOT12: | |
26e41594 | 989 | case R_390_GOT16: |
69fc87f1 MS |
990 | case R_390_GOT32: |
991 | case R_390_GOT64: | |
992 | case R_390_GOTENT: | |
993 | case R_390_TLS_GD64: | |
994 | /* This symbol requires a global offset table entry. */ | |
995 | switch (r_type) | |
996 | { | |
997 | default: | |
998 | case R_390_GOT12: | |
999 | case R_390_GOT16: | |
1000 | case R_390_GOT32: | |
1001 | case R_390_GOTENT: | |
1002 | tls_type = GOT_NORMAL; | |
1003 | break; | |
1004 | case R_390_TLS_GD64: | |
1005 | tls_type = GOT_TLS_GD; | |
1006 | break; | |
1007 | case R_390_TLS_IE64: | |
1008 | case R_390_TLS_GOTIE64: | |
1009 | tls_type = GOT_TLS_IE; | |
1010 | break; | |
1011 | case R_390_TLS_GOTIE12: | |
1012 | case R_390_TLS_IEENT: | |
1013 | tls_type = GOT_TLS_IE_NLT; | |
1014 | break; | |
1015 | } | |
1016 | ||
1017 | if (h != NULL) | |
1018 | { | |
1019 | h->got.refcount += 1; | |
1020 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1021 | } | |
5236c819 MS |
1022 | else |
1023 | { | |
1024 | local_got_refcounts[r_symndx] += 1; | |
69fc87f1 | 1025 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; |
5236c819 | 1026 | } |
69fc87f1 MS |
1027 | /* If a TLS symbol is accessed using IE at least once, |
1028 | there is no point to use dynamic model for it. */ | |
1029 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1030 | { | |
1031 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1032 | { | |
1033 | (*_bfd_error_handler) | |
1034 | (_("%s: `%s' accessed both as normal and thread local symbol"), | |
1035 | bfd_archive_filename (abfd), h->root.root.string); | |
1036 | return FALSE; | |
1037 | } | |
1038 | if (old_tls_type > tls_type) | |
1039 | tls_type = old_tls_type; | |
1040 | } | |
1041 | ||
1042 | if (old_tls_type != tls_type) | |
1043 | { | |
1044 | if (h != NULL) | |
1045 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1046 | else | |
1047 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1048 | } | |
1049 | ||
1050 | if (r_type != R_390_TLS_IE64) | |
1051 | break; | |
1052 | /* Fall through */ | |
1053 | ||
1054 | case R_390_TLS_LE64: | |
1055 | if (!info->shared) | |
1056 | break; | |
1057 | info->flags |= DF_STATIC_TLS; | |
1058 | /* Fall through */ | |
ec338859 | 1059 | |
947216bf AM |
1060 | case R_390_8: |
1061 | case R_390_16: | |
a85d7ed0 NC |
1062 | case R_390_32: |
1063 | case R_390_64: | |
947216bf AM |
1064 | case R_390_PC16: |
1065 | case R_390_PC16DBL: | |
a85d7ed0 NC |
1066 | case R_390_PC32: |
1067 | case R_390_PC32DBL: | |
1068 | case R_390_PC64: | |
0451c93c MS |
1069 | if (h != NULL && !info->shared) |
1070 | { | |
1071 | /* If this reloc is in a read-only section, we might | |
1072 | need a copy reloc. We can't check reliably at this | |
1073 | stage whether the section is read-only, as input | |
1074 | sections have not yet been mapped to output sections. | |
1075 | Tentatively set the flag for now, and correct in | |
1076 | adjust_dynamic_symbol. */ | |
1077 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
ec338859 | 1078 | |
0451c93c MS |
1079 | /* We may need a .plt entry if the function this reloc |
1080 | refers to is in a shared lib. */ | |
1081 | h->plt.refcount += 1; | |
1082 | } | |
ec338859 | 1083 | |
a85d7ed0 | 1084 | /* If we are creating a shared library, and this is a reloc |
0451c93c MS |
1085 | against a global symbol, or a non PC relative reloc |
1086 | against a local symbol, then we need to copy the reloc | |
1087 | into the shared library. However, if we are linking with | |
1088 | -Bsymbolic, we do not need to copy a reloc against a | |
1089 | global symbol which is defined in an object we are | |
1090 | including in the link (i.e., DEF_REGULAR is set). At | |
1091 | this point we have not seen all the input files, so it is | |
1092 | possible that DEF_REGULAR is not set now but will be set | |
1093 | later (it is never cleared). In case of a weak definition, | |
1094 | DEF_REGULAR may be cleared later by a strong definition in | |
1095 | a shared library. We account for that possibility below by | |
1096 | storing information in the relocs_copied field of the hash | |
1097 | table entry. A similar situation occurs when creating | |
1098 | shared libraries and symbol visibility changes render the | |
1099 | symbol local. | |
1100 | ||
1101 | If on the other hand, we are creating an executable, we | |
1102 | may need to keep relocations for symbols satisfied by a | |
1103 | dynamic library if we manage to avoid copy relocs for the | |
1104 | symbol. */ | |
1105 | if ((info->shared | |
1106 | && (sec->flags & SEC_ALLOC) != 0 | |
1107 | && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 | |
1108 | && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL | |
1109 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32 | |
1110 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL | |
1111 | && ELF64_R_TYPE (rel->r_info) != R_390_PC64) | |
1112 | || (h != NULL | |
1113 | && (! info->symbolic | |
1114 | || h->root.type == bfd_link_hash_defweak | |
1115 | || (h->elf_link_hash_flags | |
1116 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1117 | || (!info->shared | |
1118 | && (sec->flags & SEC_ALLOC) != 0 | |
1119 | && h != NULL | |
1120 | && (h->root.type == bfd_link_hash_defweak | |
1121 | || (h->elf_link_hash_flags | |
1122 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
a85d7ed0 | 1123 | { |
ec338859 AM |
1124 | struct elf_s390_dyn_relocs *p; |
1125 | struct elf_s390_dyn_relocs **head; | |
1126 | ||
0451c93c MS |
1127 | /* We must copy these reloc types into the output file. |
1128 | Create a reloc section in dynobj and make room for | |
1129 | this reloc. */ | |
a85d7ed0 NC |
1130 | if (sreloc == NULL) |
1131 | { | |
1132 | const char *name; | |
0451c93c | 1133 | bfd *dynobj; |
ec338859 | 1134 | |
a85d7ed0 NC |
1135 | name = (bfd_elf_string_from_elf_section |
1136 | (abfd, | |
1137 | elf_elfheader (abfd)->e_shstrndx, | |
1138 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1139 | if (name == NULL) | |
b34976b6 | 1140 | return FALSE; |
ec338859 | 1141 | |
0451c93c MS |
1142 | if (strncmp (name, ".rela", 5) != 0 |
1143 | || strcmp (bfd_get_section_name (abfd, sec), | |
1144 | name + 5) != 0) | |
1145 | { | |
1146 | (*_bfd_error_handler) | |
1147 | (_("%s: bad relocation section name `%s\'"), | |
1148 | bfd_archive_filename (abfd), name); | |
1149 | } | |
ec338859 | 1150 | |
0451c93c MS |
1151 | if (htab->elf.dynobj == NULL) |
1152 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1153 | |
0451c93c | 1154 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
1155 | sreloc = bfd_get_section_by_name (dynobj, name); |
1156 | if (sreloc == NULL) | |
1157 | { | |
1158 | flagword flags; | |
ec338859 | 1159 | |
a85d7ed0 NC |
1160 | sreloc = bfd_make_section (dynobj, name); |
1161 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1162 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1163 | if ((sec->flags & SEC_ALLOC) != 0) | |
1164 | flags |= SEC_ALLOC | SEC_LOAD; | |
1165 | if (sreloc == NULL | |
1166 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
99881371 | 1167 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 1168 | return FALSE; |
a85d7ed0 | 1169 | } |
0451c93c | 1170 | elf_section_data (sec)->sreloc = sreloc; |
a85d7ed0 | 1171 | } |
ec338859 | 1172 | |
0451c93c MS |
1173 | /* If this is a global symbol, we count the number of |
1174 | relocations we need for this symbol. */ | |
1175 | if (h != NULL) | |
a85d7ed0 | 1176 | { |
ec338859 | 1177 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1178 | } |
1179 | else | |
1180 | { | |
ec338859 AM |
1181 | /* Track dynamic relocs needed for local syms too. |
1182 | We really need local syms available to do this | |
1183 | easily. Oh well. */ | |
1184 | ||
1185 | asection *s; | |
1186 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1187 | sec, r_symndx); | |
1188 | if (s == NULL) | |
b34976b6 | 1189 | return FALSE; |
ec338859 AM |
1190 | |
1191 | head = ((struct elf_s390_dyn_relocs **) | |
1192 | &elf_section_data (s)->local_dynrel); | |
1193 | } | |
1194 | ||
1195 | p = *head; | |
1196 | if (p == NULL || p->sec != sec) | |
1197 | { | |
1198 | bfd_size_type amt = sizeof *p; | |
1199 | p = ((struct elf_s390_dyn_relocs *) | |
1200 | bfd_alloc (htab->elf.dynobj, amt)); | |
1201 | if (p == NULL) | |
b34976b6 | 1202 | return FALSE; |
ec338859 AM |
1203 | p->next = *head; |
1204 | *head = p; | |
1205 | p->sec = sec; | |
1206 | p->count = 0; | |
1207 | p->pc_count = 0; | |
a85d7ed0 | 1208 | } |
ec338859 AM |
1209 | |
1210 | p->count += 1; | |
1211 | if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 | |
1212 | || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL | |
1213 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32 | |
1214 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL | |
1215 | || ELF64_R_TYPE (rel->r_info) == R_390_PC64) | |
1216 | p->pc_count += 1; | |
a85d7ed0 | 1217 | } |
a85d7ed0 | 1218 | break; |
ec338859 | 1219 | |
a85d7ed0 NC |
1220 | /* This relocation describes the C++ object vtable hierarchy. |
1221 | Reconstruct it for later use during GC. */ | |
947216bf AM |
1222 | case R_390_GNU_VTINHERIT: |
1223 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 1224 | return FALSE; |
947216bf | 1225 | break; |
ec338859 | 1226 | |
a85d7ed0 NC |
1227 | /* This relocation describes which C++ vtable entries are actually |
1228 | used. Record for later use during GC. */ | |
947216bf AM |
1229 | case R_390_GNU_VTENTRY: |
1230 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 1231 | return FALSE; |
947216bf | 1232 | break; |
ec338859 | 1233 | |
a85d7ed0 NC |
1234 | default: |
1235 | break; | |
1236 | } | |
1237 | } | |
1238 | ||
b34976b6 | 1239 | return TRUE; |
a85d7ed0 NC |
1240 | } |
1241 | ||
1242 | /* Return the section that should be marked against GC for a given | |
1243 | relocation. */ | |
1244 | ||
1245 | static asection * | |
1e2f5b6e AM |
1246 | elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
1247 | asection *sec; | |
a85d7ed0 NC |
1248 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1249 | Elf_Internal_Rela *rel; | |
1250 | struct elf_link_hash_entry *h; | |
1251 | Elf_Internal_Sym *sym; | |
1252 | { | |
1253 | if (h != NULL) | |
1254 | { | |
1255 | switch (ELF64_R_TYPE (rel->r_info)) | |
1256 | { | |
1257 | case R_390_GNU_VTINHERIT: | |
1258 | case R_390_GNU_VTENTRY: | |
1259 | break; | |
1260 | ||
1261 | default: | |
1262 | switch (h->root.type) | |
1263 | { | |
1264 | case bfd_link_hash_defined: | |
1265 | case bfd_link_hash_defweak: | |
1266 | return h->root.u.def.section; | |
1267 | ||
1268 | case bfd_link_hash_common: | |
1269 | return h->root.u.c.p->section; | |
1270 | ||
1271 | default: | |
1272 | break; | |
1273 | } | |
1274 | } | |
1275 | } | |
1276 | else | |
1e2f5b6e | 1277 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
a85d7ed0 NC |
1278 | |
1279 | return NULL; | |
1280 | } | |
1281 | ||
1282 | /* Update the got entry reference counts for the section being removed. */ | |
1283 | ||
b34976b6 | 1284 | static bfd_boolean |
a85d7ed0 | 1285 | elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
0451c93c MS |
1286 | bfd *abfd; |
1287 | struct bfd_link_info *info; | |
1288 | asection *sec; | |
1289 | const Elf_Internal_Rela *relocs; | |
a85d7ed0 NC |
1290 | { |
1291 | Elf_Internal_Shdr *symtab_hdr; | |
1292 | struct elf_link_hash_entry **sym_hashes; | |
1293 | bfd_signed_vma *local_got_refcounts; | |
1294 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1295 | |
ec338859 | 1296 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1297 | |
0451c93c MS |
1298 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1299 | sym_hashes = elf_sym_hashes (abfd); | |
1300 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1301 | |
1302 | relend = relocs + sec->reloc_count; | |
1303 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1304 | { |
26e41594 AM |
1305 | unsigned long r_symndx; |
1306 | unsigned int r_type; | |
1307 | struct elf_link_hash_entry *h = NULL; | |
1308 | ||
5236c819 | 1309 | r_symndx = ELF64_R_SYM (rel->r_info); |
26e41594 AM |
1310 | if (r_symndx >= symtab_hdr->sh_info) |
1311 | { | |
1312 | struct elf_s390_link_hash_entry *eh; | |
1313 | struct elf_s390_dyn_relocs **pp; | |
1314 | struct elf_s390_dyn_relocs *p; | |
5236c819 | 1315 | |
26e41594 AM |
1316 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1317 | eh = (struct elf_s390_link_hash_entry *) h; | |
5236c819 | 1318 | |
26e41594 AM |
1319 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1320 | if (p->sec == sec) | |
1321 | { | |
1322 | /* Everything must go for SEC. */ | |
1323 | *pp = p->next; | |
1324 | break; | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | r_type = ELF64_R_TYPE (rel->r_info); | |
1329 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1330 | switch (r_type) |
5236c819 | 1331 | { |
69fc87f1 MS |
1332 | case R_390_TLS_LDM64: |
1333 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1334 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1335 | break; | |
1336 | ||
1337 | case R_390_TLS_GD64: | |
1338 | case R_390_TLS_IE64: | |
1339 | case R_390_TLS_GOTIE12: | |
1340 | case R_390_TLS_GOTIE64: | |
1341 | case R_390_TLS_IEENT: | |
5236c819 MS |
1342 | case R_390_GOT12: |
1343 | case R_390_GOT16: | |
1344 | case R_390_GOT32: | |
1345 | case R_390_GOT64: | |
1346 | case R_390_GOTOFF16: | |
1347 | case R_390_GOTOFF32: | |
1348 | case R_390_GOTOFF64: | |
1349 | case R_390_GOTPC: | |
1350 | case R_390_GOTPCDBL: | |
1351 | case R_390_GOTENT: | |
1352 | if (h != NULL) | |
1353 | { | |
1354 | if (h->got.refcount > 0) | |
1355 | h->got.refcount -= 1; | |
1356 | } | |
1357 | else if (local_got_refcounts != NULL) | |
1358 | { | |
1359 | if (local_got_refcounts[r_symndx] > 0) | |
1360 | local_got_refcounts[r_symndx] -= 1; | |
1361 | } | |
26e41594 | 1362 | break; |
a85d7ed0 | 1363 | |
5236c819 MS |
1364 | case R_390_8: |
1365 | case R_390_12: | |
1366 | case R_390_16: | |
1367 | case R_390_32: | |
1368 | case R_390_64: | |
1369 | case R_390_PC16: | |
1370 | case R_390_PC16DBL: | |
1371 | case R_390_PC32: | |
1372 | case R_390_PC32DBL: | |
1373 | case R_390_PC64: | |
26e41594 AM |
1374 | if (info->shared) |
1375 | break; | |
1376 | /* Fall through */ | |
a85d7ed0 | 1377 | |
69fc87f1 MS |
1378 | case R_390_PLT16DBL: |
1379 | case R_390_PLT32: | |
1380 | case R_390_PLT32DBL: | |
1381 | case R_390_PLT64: | |
1382 | case R_390_PLTOFF16: | |
1383 | case R_390_PLTOFF32: | |
1384 | case R_390_PLTOFF64: | |
1385 | if (h != NULL) | |
1386 | { | |
1387 | if (h->plt.refcount > 0) | |
1388 | h->plt.refcount -= 1; | |
1389 | } | |
1390 | break; | |
1391 | ||
1392 | case R_390_GOTPLT12: | |
1393 | case R_390_GOTPLT16: | |
1394 | case R_390_GOTPLT32: | |
1395 | case R_390_GOTPLT64: | |
1396 | case R_390_GOTPLTENT: | |
1397 | if (h != NULL) | |
1398 | { | |
1399 | if (h->plt.refcount > 0) | |
1400 | { | |
1401 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1402 | h->plt.refcount -= 1; | |
1403 | } | |
1404 | } | |
1405 | else if (local_got_refcounts != NULL) | |
1406 | { | |
1407 | if (local_got_refcounts[r_symndx] > 0) | |
1408 | local_got_refcounts[r_symndx] -= 1; | |
1409 | } | |
1410 | break; | |
1411 | ||
5236c819 MS |
1412 | default: |
1413 | break; | |
1414 | } | |
1415 | } | |
a85d7ed0 | 1416 | |
b34976b6 | 1417 | return TRUE; |
a85d7ed0 NC |
1418 | } |
1419 | ||
5236c819 MS |
1420 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1421 | entry but we found we will not create any. Called when we find we will | |
1422 | not have any PLT for this symbol, by for example | |
1423 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1424 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1425 | created (we're only linking static objects). */ | |
1426 | ||
1427 | static void | |
1428 | elf_s390_adjust_gotplt (h) | |
1429 | struct elf_s390_link_hash_entry *h; | |
1430 | { | |
1431 | if (h->elf.root.type == bfd_link_hash_warning) | |
1432 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1433 | ||
1434 | if (h->gotplt_refcount <= 0) | |
1435 | return; | |
1436 | ||
1437 | /* We simply add the number of gotplt references to the number | |
1438 | * of got references for this symbol. */ | |
1439 | h->elf.got.refcount += h->gotplt_refcount; | |
1440 | h->gotplt_refcount = -1; | |
1441 | } | |
1442 | ||
a85d7ed0 NC |
1443 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1444 | regular object. The current definition is in some section of the | |
1445 | dynamic object, but we're not including those sections. We have to | |
1446 | change the definition to something the rest of the link can | |
1447 | understand. */ | |
1448 | ||
b34976b6 | 1449 | static bfd_boolean |
a85d7ed0 NC |
1450 | elf_s390_adjust_dynamic_symbol (info, h) |
1451 | struct bfd_link_info *info; | |
1452 | struct elf_link_hash_entry *h; | |
1453 | { | |
0451c93c MS |
1454 | struct elf_s390_link_hash_table *htab; |
1455 | struct elf_s390_link_hash_entry * eh; | |
1456 | struct elf_s390_dyn_relocs *p; | |
a85d7ed0 NC |
1457 | asection *s; |
1458 | unsigned int power_of_two; | |
1459 | ||
a85d7ed0 NC |
1460 | /* If this is a function, put it in the procedure linkage table. We |
1461 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1462 | (although we could actually do it here). */ |
a85d7ed0 NC |
1463 | if (h->type == STT_FUNC |
1464 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1465 | { | |
0451c93c MS |
1466 | if (h->plt.refcount <= 0 |
1467 | || (! info->shared | |
1468 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
f9cd9119 MS |
1469 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
1470 | && h->root.type != bfd_link_hash_undefweak | |
1471 | && h->root.type != bfd_link_hash_undefined)) | |
a85d7ed0 NC |
1472 | { |
1473 | /* This case can occur if we saw a PLT32 reloc in an input | |
947216bf AM |
1474 | file, but the symbol was never referred to by a dynamic |
1475 | object, or if all references were garbage collected. In | |
0451c93c MS |
1476 | such a case, we don't actually need to build a procedure |
1477 | linkage table, and we can just do a PC32 reloc instead. */ | |
a85d7ed0 NC |
1478 | h->plt.offset = (bfd_vma) -1; |
1479 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1480 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1481 | } |
1482 | ||
b34976b6 | 1483 | return TRUE; |
a85d7ed0 | 1484 | } |
bbd7ec4a | 1485 | else |
0451c93c MS |
1486 | /* It's possible that we incorrectly decided a .plt reloc was |
1487 | needed for an R_390_PC32 reloc to a non-function sym in | |
1488 | check_relocs. We can't decide accurately between function and | |
1489 | non-function syms in check-relocs; Objects loaded later in | |
1490 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1491 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1492 | |
1493 | /* If this is a weak symbol, and there is a real definition, the | |
1494 | processor independent code will have arranged for us to see the | |
1495 | real definition first, and we can just use the same value. */ | |
1496 | if (h->weakdef != NULL) | |
1497 | { | |
1498 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1499 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1500 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1501 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
b34976b6 | 1502 | return TRUE; |
a85d7ed0 NC |
1503 | } |
1504 | ||
1505 | /* This is a reference to a symbol defined by a dynamic object which | |
1506 | is not a function. */ | |
1507 | ||
1508 | /* If we are creating a shared library, we must presume that the | |
1509 | only references to the symbol are via the global offset table. | |
1510 | For such cases we need not do anything here; the relocations will | |
1511 | be handled correctly by relocate_section. */ | |
1512 | if (info->shared) | |
b34976b6 | 1513 | return TRUE; |
a85d7ed0 NC |
1514 | |
1515 | /* If there are no references to this symbol that do not use the | |
1516 | GOT, we don't need to generate a copy reloc. */ | |
1517 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
b34976b6 | 1518 | return TRUE; |
a85d7ed0 | 1519 | |
0451c93c MS |
1520 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1521 | if (info->nocopyreloc) | |
1522 | { | |
1523 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1524 | return TRUE; |
0451c93c MS |
1525 | } |
1526 | ||
1527 | eh = (struct elf_s390_link_hash_entry *) h; | |
1528 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1529 | { | |
1530 | s = p->sec->output_section; | |
1531 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1532 | break; | |
1533 | } | |
1534 | ||
1535 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1536 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1537 | if (p == NULL) | |
1538 | { | |
1539 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1540 | return TRUE; |
0451c93c MS |
1541 | } |
1542 | ||
a85d7ed0 NC |
1543 | /* We must allocate the symbol in our .dynbss section, which will |
1544 | become part of the .bss section of the executable. There will be | |
1545 | an entry for this symbol in the .dynsym section. The dynamic | |
1546 | object will contain position independent code, so all references | |
1547 | from the dynamic object to this symbol will go through the global | |
1548 | offset table. The dynamic linker will use the .dynsym entry to | |
1549 | determine the address it must put in the global offset table, so | |
1550 | both the dynamic object and the regular object will refer to the | |
1551 | same memory location for the variable. */ | |
1552 | ||
0451c93c | 1553 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1554 | |
0451c93c MS |
1555 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1556 | copy the initial value out of the dynamic object and into the | |
1557 | runtime process image. */ | |
a85d7ed0 NC |
1558 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1559 | { | |
0451c93c | 1560 | htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
a85d7ed0 NC |
1561 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1562 | } | |
1563 | ||
1564 | /* We need to figure out the alignment required for this symbol. I | |
1565 | have no idea how ELF linkers handle this. */ | |
1566 | power_of_two = bfd_log2 (h->size); | |
1567 | if (power_of_two > 3) | |
1568 | power_of_two = 3; | |
1569 | ||
1570 | /* Apply the required alignment. */ | |
0451c93c MS |
1571 | s = htab->sdynbss; |
1572 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
1573 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
a85d7ed0 | 1574 | { |
0451c93c | 1575 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1576 | return FALSE; |
a85d7ed0 NC |
1577 | } |
1578 | ||
1579 | /* Define the symbol as being at this point in the section. */ | |
1580 | h->root.u.def.section = s; | |
1581 | h->root.u.def.value = s->_raw_size; | |
1582 | ||
1583 | /* Increment the section size to make room for the symbol. */ | |
1584 | s->_raw_size += h->size; | |
1585 | ||
b34976b6 | 1586 | return TRUE; |
a85d7ed0 NC |
1587 | } |
1588 | ||
0451c93c MS |
1589 | /* This is the condition under which elf_s390_finish_dynamic_symbol |
1590 | will be called from elflink.h. If elflink.h doesn't call our | |
1591 | finish_dynamic_symbol routine, we'll need to do something about | |
1592 | initializing any .plt and .got entries in elf_s390_relocate_section. */ | |
1593 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ | |
1594 | ((DYN) \ | |
1595 | && ((INFO)->shared \ | |
1596 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
1597 | && ((H)->dynindx != -1 \ | |
1598 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1599 | ||
1600 | /* Allocate space in .plt, .got and associated reloc sections for | |
1601 | dynamic relocs. */ | |
1602 | ||
b34976b6 | 1603 | static bfd_boolean |
0451c93c MS |
1604 | allocate_dynrelocs (h, inf) |
1605 | struct elf_link_hash_entry *h; | |
1606 | PTR inf; | |
1607 | { | |
1608 | struct bfd_link_info *info; | |
1609 | struct elf_s390_link_hash_table *htab; | |
1610 | struct elf_s390_link_hash_entry *eh; | |
1611 | struct elf_s390_dyn_relocs *p; | |
1612 | ||
e92d460e | 1613 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1614 | return TRUE; |
0451c93c | 1615 | |
e92d460e | 1616 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1617 | /* When warning symbols are created, they **replace** the "real" |
1618 | entry in the hash table, thus we never get to see the real | |
1619 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1620 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1621 | ||
0451c93c MS |
1622 | info = (struct bfd_link_info *) inf; |
1623 | htab = elf_s390_hash_table (info); | |
1624 | ||
1625 | if (htab->elf.dynamic_sections_created | |
1626 | && h->plt.refcount > 0) | |
1627 | { | |
1628 | /* Make sure this symbol is output as a dynamic symbol. | |
1629 | Undefined weak syms won't yet be marked as dynamic. */ | |
1630 | if (h->dynindx == -1 | |
1631 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1632 | { | |
1633 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1634 | return FALSE; |
0451c93c MS |
1635 | } |
1636 | ||
1637 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) | |
1638 | { | |
1639 | asection *s = htab->splt; | |
1640 | ||
1641 | /* If this is the first .plt entry, make room for the special | |
1642 | first entry. */ | |
1643 | if (s->_raw_size == 0) | |
1644 | s->_raw_size += PLT_FIRST_ENTRY_SIZE; | |
1645 | ||
1646 | h->plt.offset = s->_raw_size; | |
1647 | ||
1648 | /* If this symbol is not defined in a regular file, and we are | |
1649 | not generating a shared library, then set the symbol to this | |
1650 | location in the .plt. This is required to make function | |
1651 | pointers compare as equal between the normal executable and | |
1652 | the shared library. */ | |
1653 | if (! info->shared | |
1654 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1655 | { | |
1656 | h->root.u.def.section = s; | |
1657 | h->root.u.def.value = h->plt.offset; | |
1658 | } | |
ec338859 | 1659 | |
0451c93c MS |
1660 | /* Make room for this entry. */ |
1661 | s->_raw_size += PLT_ENTRY_SIZE; | |
ec338859 | 1662 | |
0451c93c MS |
1663 | /* We also need to make an entry in the .got.plt section, which |
1664 | will be placed in the .got section by the linker script. */ | |
1665 | htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; | |
1666 | ||
1667 | /* We also need to make an entry in the .rela.plt section. */ | |
1668 | htab->srelplt->_raw_size += sizeof (Elf64_External_Rela); | |
1669 | } | |
1670 | else | |
1671 | { | |
1672 | h->plt.offset = (bfd_vma) -1; | |
1673 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1674 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1675 | } |
1676 | } | |
1677 | else | |
1678 | { | |
1679 | h->plt.offset = (bfd_vma) -1; | |
1680 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1681 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1682 | } |
1683 | ||
69fc87f1 MS |
1684 | /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to |
1685 | the binary, we can optimize a bit. IE64 and GOTIE64 get converted | |
1686 | to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT | |
1687 | we can save the dynamic TLS relocation. */ | |
1688 | if (h->got.refcount > 0 | |
1689 | && !info->shared | |
1690 | && h->dynindx == -1 | |
1691 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
1692 | { | |
1693 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) | |
1694 | /* For the GOTIE access without a literal pool entry the offset has | |
1695 | to be stored somewhere. The immediate value in the instruction | |
1696 | is not bit enough so the value is stored in the got. */ | |
1697 | { | |
1698 | h->got.offset = htab->sgot->_raw_size; | |
1699 | htab->sgot->_raw_size += GOT_ENTRY_SIZE; | |
1700 | } | |
1701 | else | |
1702 | h->got.offset = (bfd_vma) -1; | |
1703 | } | |
1704 | else if (h->got.refcount > 0) | |
0451c93c MS |
1705 | { |
1706 | asection *s; | |
b34976b6 | 1707 | bfd_boolean dyn; |
69fc87f1 | 1708 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1709 | |
1710 | /* Make sure this symbol is output as a dynamic symbol. | |
1711 | Undefined weak syms won't yet be marked as dynamic. */ | |
1712 | if (h->dynindx == -1 | |
1713 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1714 | { | |
1715 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1716 | return FALSE; |
0451c93c MS |
1717 | } |
1718 | ||
1719 | s = htab->sgot; | |
1720 | h->got.offset = s->_raw_size; | |
1721 | s->_raw_size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1722 | /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ |
1723 | if (tls_type == GOT_TLS_GD) | |
1724 | s->_raw_size += GOT_ENTRY_SIZE; | |
0451c93c | 1725 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1726 | /* R_390_TLS_IE64 needs one dynamic relocation, |
1727 | R_390_TLS_GD64 needs one if local symbol and two if global. */ | |
1728 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1729 | || tls_type >= GOT_TLS_IE) | |
1730 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1731 | else if (tls_type == GOT_TLS_GD) | |
1732 | htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela); | |
1733 | else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) | |
0451c93c MS |
1734 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
1735 | } | |
1736 | else | |
1737 | h->got.offset = (bfd_vma) -1; | |
1738 | ||
1739 | eh = (struct elf_s390_link_hash_entry *) h; | |
1740 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1741 | return TRUE; |
0451c93c MS |
1742 | |
1743 | /* In the shared -Bsymbolic case, discard space allocated for | |
1744 | dynamic pc-relative relocs against symbols which turn out to be | |
1745 | defined in regular objects. For the normal shared case, discard | |
1746 | space for pc-relative relocs that have become local due to symbol | |
1747 | visibility changes. */ | |
1748 | ||
1749 | if (info->shared) | |
1750 | { | |
1751 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1752 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1753 | || info->symbolic)) | |
1754 | { | |
1755 | struct elf_s390_dyn_relocs **pp; | |
1756 | ||
1757 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1758 | { | |
1759 | p->count -= p->pc_count; | |
1760 | p->pc_count = 0; | |
1761 | if (p->count == 0) | |
1762 | *pp = p->next; | |
1763 | else | |
1764 | pp = &p->next; | |
1765 | } | |
1766 | } | |
1767 | } | |
1768 | else | |
1769 | { | |
1770 | /* For the non-shared case, discard space for relocs against | |
1771 | symbols which turn out to need copy relocs or are not | |
1772 | dynamic. */ | |
1773 | ||
1774 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1775 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1776 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1777 | || (htab->elf.dynamic_sections_created | |
1778 | && (h->root.type == bfd_link_hash_undefweak | |
1779 | || h->root.type == bfd_link_hash_undefined)))) | |
1780 | { | |
1781 | /* Make sure this symbol is output as a dynamic symbol. | |
1782 | Undefined weak syms won't yet be marked as dynamic. */ | |
1783 | if (h->dynindx == -1 | |
1784 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1785 | { | |
1786 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1787 | return FALSE; |
0451c93c MS |
1788 | } |
1789 | ||
1790 | /* If that succeeded, we know we'll be keeping all the | |
1791 | relocs. */ | |
1792 | if (h->dynindx != -1) | |
1793 | goto keep; | |
1794 | } | |
1795 | ||
1796 | eh->dyn_relocs = NULL; | |
1797 | ||
ec338859 | 1798 | keep: ; |
0451c93c MS |
1799 | } |
1800 | ||
1801 | /* Finally, allocate space. */ | |
1802 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1803 | { | |
1804 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
1805 | sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
1806 | } | |
1807 | ||
b34976b6 | 1808 | return TRUE; |
0451c93c MS |
1809 | } |
1810 | ||
1811 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1812 | ||
b34976b6 | 1813 | static bfd_boolean |
0451c93c MS |
1814 | readonly_dynrelocs (h, inf) |
1815 | struct elf_link_hash_entry *h; | |
1816 | PTR inf; | |
1817 | { | |
1818 | struct elf_s390_link_hash_entry *eh; | |
1819 | struct elf_s390_dyn_relocs *p; | |
1820 | ||
e92d460e AM |
1821 | if (h->root.type == bfd_link_hash_warning) |
1822 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1823 | ||
0451c93c MS |
1824 | eh = (struct elf_s390_link_hash_entry *) h; |
1825 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1826 | { | |
1827 | asection *s = p->sec->output_section; | |
1828 | ||
1829 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1830 | { | |
1831 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1832 | ||
1833 | info->flags |= DF_TEXTREL; | |
1834 | ||
1835 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1836 | return FALSE; |
0451c93c MS |
1837 | } |
1838 | } | |
b34976b6 | 1839 | return TRUE; |
0451c93c MS |
1840 | } |
1841 | ||
a85d7ed0 NC |
1842 | /* Set the sizes of the dynamic sections. */ |
1843 | ||
b34976b6 | 1844 | static bfd_boolean |
a85d7ed0 | 1845 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1846 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1847 | struct bfd_link_info *info; |
1848 | { | |
0451c93c | 1849 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1850 | bfd *dynobj; |
1851 | asection *s; | |
b34976b6 | 1852 | bfd_boolean relocs; |
0451c93c | 1853 | bfd *ibfd; |
a85d7ed0 | 1854 | |
0451c93c MS |
1855 | htab = elf_s390_hash_table (info); |
1856 | dynobj = htab->elf.dynobj; | |
1857 | if (dynobj == NULL) | |
1858 | abort (); | |
a85d7ed0 | 1859 | |
0451c93c | 1860 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1861 | { |
1862 | /* Set the contents of the .interp section to the interpreter. */ | |
1863 | if (! info->shared) | |
1864 | { | |
1865 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1866 | if (s == NULL) |
1867 | abort (); | |
a85d7ed0 NC |
1868 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
1869 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1870 | } | |
1871 | } | |
a85d7ed0 | 1872 | |
0451c93c MS |
1873 | /* Set up .got offsets for local syms, and space for local dynamic |
1874 | relocs. */ | |
1875 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 1876 | { |
0451c93c MS |
1877 | bfd_signed_vma *local_got; |
1878 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 1879 | char *local_tls_type; |
0451c93c MS |
1880 | bfd_size_type locsymcount; |
1881 | Elf_Internal_Shdr *symtab_hdr; | |
1882 | asection *srela; | |
a85d7ed0 | 1883 | |
0451c93c | 1884 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
a85d7ed0 NC |
1885 | continue; |
1886 | ||
0451c93c | 1887 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 1888 | { |
ec338859 | 1889 | struct elf_s390_dyn_relocs *p; |
0451c93c | 1890 | |
ec338859 AM |
1891 | for (p = *((struct elf_s390_dyn_relocs **) |
1892 | &elf_section_data (s)->local_dynrel); | |
1893 | p != NULL; | |
1894 | p = p->next) | |
a85d7ed0 | 1895 | { |
ec338859 AM |
1896 | if (!bfd_is_abs_section (p->sec) |
1897 | && bfd_is_abs_section (p->sec->output_section)) | |
1898 | { | |
1899 | /* Input section has been discarded, either because | |
1900 | it is a copy of a linkonce section or due to | |
1901 | linker script /DISCARD/, so we'll be discarding | |
1902 | the relocs too. */ | |
1903 | } | |
248866a8 | 1904 | else if (p->count != 0) |
ec338859 AM |
1905 | { |
1906 | srela = elf_section_data (p->sec)->sreloc; | |
1907 | srela->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
248866a8 AM |
1908 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1909 | info->flags |= DF_TEXTREL; | |
ec338859 | 1910 | } |
a85d7ed0 NC |
1911 | } |
1912 | } | |
0451c93c MS |
1913 | |
1914 | local_got = elf_local_got_refcounts (ibfd); | |
1915 | if (!local_got) | |
1916 | continue; | |
1917 | ||
1918 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1919 | locsymcount = symtab_hdr->sh_info; | |
1920 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 1921 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
1922 | s = htab->sgot; |
1923 | srela = htab->srelgot; | |
69fc87f1 | 1924 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 1925 | { |
0451c93c | 1926 | if (*local_got > 0) |
a85d7ed0 | 1927 | { |
0451c93c MS |
1928 | *local_got = s->_raw_size; |
1929 | s->_raw_size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1930 | if (*local_tls_type == GOT_TLS_GD) |
1931 | s->_raw_size += GOT_ENTRY_SIZE; | |
0451c93c MS |
1932 | if (info->shared) |
1933 | srela->_raw_size += sizeof (Elf64_External_Rela); | |
a85d7ed0 NC |
1934 | } |
1935 | else | |
0451c93c | 1936 | *local_got = (bfd_vma) -1; |
a85d7ed0 | 1937 | } |
0451c93c MS |
1938 | } |
1939 | ||
69fc87f1 MS |
1940 | if (htab->tls_ldm_got.refcount > 0) |
1941 | { | |
1942 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 | |
1943 | relocs. */ | |
1944 | htab->tls_ldm_got.offset = htab->sgot->_raw_size; | |
1945 | htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; | |
1946 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1947 | } | |
1948 | else | |
1949 | htab->tls_ldm_got.offset = -1; | |
1950 | ||
0451c93c MS |
1951 | /* Allocate global sym .plt and .got entries, and space for global |
1952 | sym dynamic relocs. */ | |
1953 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
1954 | ||
1955 | /* We now have determined the sizes of the various dynamic sections. | |
1956 | Allocate memory for them. */ | |
b34976b6 | 1957 | relocs = FALSE; |
0451c93c MS |
1958 | for (s = dynobj->sections; s != NULL; s = s->next) |
1959 | { | |
1960 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1961 | continue; | |
1962 | ||
1963 | if (s == htab->splt | |
1964 | || s == htab->sgot | |
1965 | || s == htab->sgotplt) | |
1966 | { | |
1967 | /* Strip this section if we don't need it; see the | |
1968 | comment below. */ | |
1969 | } | |
1970 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
1971 | { | |
1972 | if (s->_raw_size != 0 && s != htab->srelplt) | |
b34976b6 | 1973 | relocs = TRUE; |
ec338859 | 1974 | |
0451c93c MS |
1975 | /* We use the reloc_count field as a counter if we need |
1976 | to copy relocs into the output file. */ | |
1977 | s->reloc_count = 0; | |
1978 | } | |
1979 | else | |
a85d7ed0 NC |
1980 | { |
1981 | /* It's not one of our sections, so don't allocate space. */ | |
1982 | continue; | |
1983 | } | |
1984 | ||
0451c93c | 1985 | if (s->_raw_size == 0) |
a85d7ed0 | 1986 | { |
0451c93c MS |
1987 | /* If we don't need this section, strip it from the |
1988 | output file. This is to handle .rela.bss and | |
1989 | .rela.plt. We must create it in | |
1990 | create_dynamic_sections, because it must be created | |
1991 | before the linker maps input sections to output | |
1992 | sections. The linker does that before | |
1993 | adjust_dynamic_symbol is called, and it is that | |
1994 | function which decides whether anything needs to go | |
1995 | into these sections. */ | |
1996 | ||
a85d7ed0 NC |
1997 | _bfd_strip_section_from_output (info, s); |
1998 | continue; | |
1999 | } | |
2000 | ||
0451c93c MS |
2001 | /* Allocate memory for the section contents. We use bfd_zalloc |
2002 | here in case unused entries are not reclaimed before the | |
2003 | section's contents are written out. This should not happen, | |
2004 | but this way if it does, we get a R_390_NONE reloc instead | |
2005 | of garbage. */ | |
2006 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
2007 | if (s->contents == NULL) | |
b34976b6 | 2008 | return FALSE; |
a85d7ed0 NC |
2009 | } |
2010 | ||
0451c93c | 2011 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2012 | { |
2013 | /* Add some entries to the .dynamic section. We fill in the | |
2014 | values later, in elf_s390_finish_dynamic_sections, but we | |
2015 | must add the entries now so that we get the correct size for | |
2016 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2017 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
2018 | #define add_dynamic_entry(TAG, VAL) \ |
2019 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
2020 | ||
a85d7ed0 NC |
2021 | if (! info->shared) |
2022 | { | |
dc810e39 | 2023 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2024 | return FALSE; |
a85d7ed0 NC |
2025 | } |
2026 | ||
0451c93c | 2027 | if (htab->splt->_raw_size != 0) |
a85d7ed0 | 2028 | { |
dc810e39 AM |
2029 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2030 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2031 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2032 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2033 | return FALSE; |
a85d7ed0 NC |
2034 | } |
2035 | ||
2036 | if (relocs) | |
947216bf AM |
2037 | { |
2038 | if (!add_dynamic_entry (DT_RELA, 0) | |
2039 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2040 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2041 | return FALSE; |
ec338859 | 2042 | |
0451c93c MS |
2043 | /* If any dynamic relocs apply to a read-only section, |
2044 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2045 | if ((info->flags & DF_TEXTREL) == 0) |
2046 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2047 | (PTR) info); | |
ec338859 | 2048 | |
0451c93c MS |
2049 | if ((info->flags & DF_TEXTREL) != 0) |
2050 | { | |
2051 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2052 | return FALSE; |
0451c93c | 2053 | } |
a85d7ed0 NC |
2054 | } |
2055 | } | |
dc810e39 | 2056 | #undef add_dynamic_entry |
a85d7ed0 | 2057 | |
b34976b6 | 2058 | return TRUE; |
a85d7ed0 NC |
2059 | } |
2060 | ||
69fc87f1 MS |
2061 | /* Return the base VMA address which should be subtracted from real addresses |
2062 | when resolving @dtpoff relocation. | |
2063 | This is PT_TLS segment p_vaddr. */ | |
2064 | ||
2065 | static bfd_vma | |
2066 | dtpoff_base (info) | |
2067 | struct bfd_link_info *info; | |
2068 | { | |
2069 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
2070 | if (elf_hash_table (info)->tls_segment == NULL) | |
2071 | return 0; | |
2072 | return elf_hash_table (info)->tls_segment->start; | |
2073 | } | |
2074 | ||
2075 | /* Return the relocation value for @tpoff relocation | |
2076 | if STT_TLS virtual address is ADDRESS. */ | |
2077 | ||
2078 | static bfd_vma | |
2079 | tpoff (info, address) | |
2080 | struct bfd_link_info *info; | |
2081 | bfd_vma address; | |
2082 | { | |
2083 | struct elf_link_tls_segment *tls_segment | |
2084 | = elf_hash_table (info)->tls_segment; | |
2085 | ||
2086 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
2087 | if (tls_segment == NULL) | |
2088 | return 0; | |
2089 | return (align_power (tls_segment->size, tls_segment->align) | |
2090 | + tls_segment->start - address); | |
2091 | } | |
2092 | ||
2093 | /* Complain if TLS instruction relocation is against an invalid | |
2094 | instruction. */ | |
2095 | ||
2096 | static void | |
2097 | invalid_tls_insn (input_bfd, input_section, rel) | |
2098 | bfd *input_bfd; | |
2099 | asection *input_section; | |
2100 | Elf_Internal_Rela *rel; | |
2101 | { | |
2102 | reloc_howto_type *howto; | |
2103 | ||
2104 | howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); | |
2105 | (*_bfd_error_handler) | |
2106 | (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), | |
2107 | bfd_archive_filename (input_bfd), | |
2108 | bfd_get_section_name (input_bfd, input_section), | |
2109 | (long) rel->r_offset, | |
2110 | howto->name); | |
2111 | } | |
2112 | ||
a85d7ed0 NC |
2113 | /* Relocate a 390 ELF section. */ |
2114 | ||
b34976b6 | 2115 | static bfd_boolean |
a85d7ed0 NC |
2116 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2117 | contents, relocs, local_syms, local_sections) | |
2118 | bfd *output_bfd; | |
2119 | struct bfd_link_info *info; | |
2120 | bfd *input_bfd; | |
2121 | asection *input_section; | |
2122 | bfd_byte *contents; | |
2123 | Elf_Internal_Rela *relocs; | |
2124 | Elf_Internal_Sym *local_syms; | |
2125 | asection **local_sections; | |
2126 | { | |
0451c93c | 2127 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2128 | Elf_Internal_Shdr *symtab_hdr; |
2129 | struct elf_link_hash_entry **sym_hashes; | |
2130 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2131 | Elf_Internal_Rela *rel; |
2132 | Elf_Internal_Rela *relend; | |
2133 | ||
b491616a | 2134 | if (info->relocateable) |
b34976b6 | 2135 | return TRUE; |
b491616a | 2136 | |
0451c93c | 2137 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2138 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2139 | sym_hashes = elf_sym_hashes (input_bfd); | |
2140 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2141 | ||
a85d7ed0 NC |
2142 | rel = relocs; |
2143 | relend = relocs + input_section->reloc_count; | |
2144 | for (; rel < relend; rel++) | |
2145 | { | |
5236c819 | 2146 | unsigned int r_type; |
a85d7ed0 NC |
2147 | reloc_howto_type *howto; |
2148 | unsigned long r_symndx; | |
2149 | struct elf_link_hash_entry *h; | |
2150 | Elf_Internal_Sym *sym; | |
2151 | asection *sec; | |
0451c93c | 2152 | bfd_vma off; |
a85d7ed0 | 2153 | bfd_vma relocation; |
b34976b6 | 2154 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2155 | bfd_reloc_status_type r; |
69fc87f1 | 2156 | int tls_type; |
a85d7ed0 NC |
2157 | |
2158 | r_type = ELF64_R_TYPE (rel->r_info); | |
0451c93c | 2159 | if (r_type == (int) R_390_GNU_VTINHERIT |
947216bf AM |
2160 | || r_type == (int) R_390_GNU_VTENTRY) |
2161 | continue; | |
5236c819 | 2162 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2163 | { |
2164 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2165 | return FALSE; |
a85d7ed0 | 2166 | } |
a85d7ed0 | 2167 | |
b491616a | 2168 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2169 | r_symndx = ELF64_R_SYM (rel->r_info); |
5236c819 MS |
2170 | |
2171 | /* This is a final link. */ | |
a85d7ed0 NC |
2172 | h = NULL; |
2173 | sym = NULL; | |
2174 | sec = NULL; | |
b34976b6 | 2175 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2176 | if (r_symndx < symtab_hdr->sh_info) |
2177 | { | |
2178 | sym = local_syms + r_symndx; | |
2179 | sec = local_sections[r_symndx]; | |
f8df10f4 | 2180 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
a85d7ed0 NC |
2181 | } |
2182 | else | |
2183 | { | |
2184 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2185 | while (h->root.type == bfd_link_hash_indirect | |
2186 | || h->root.type == bfd_link_hash_warning) | |
2187 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
0451c93c | 2188 | |
a85d7ed0 NC |
2189 | if (h->root.type == bfd_link_hash_defined |
2190 | || h->root.type == bfd_link_hash_defweak) | |
2191 | { | |
2192 | sec = h->root.u.def.section; | |
27018c3f | 2193 | if (sec->output_section == NULL) |
a85d7ed0 | 2194 | { |
0451c93c MS |
2195 | /* Set a flag that will be cleared later if we find a |
2196 | relocation value for this symbol. output_section | |
2197 | is typically NULL for symbols satisfied by a shared | |
2198 | library. */ | |
b34976b6 | 2199 | unresolved_reloc = TRUE; |
a85d7ed0 NC |
2200 | relocation = 0; |
2201 | } | |
2202 | else | |
2203 | relocation = (h->root.u.def.value | |
2204 | + sec->output_section->vma | |
2205 | + sec->output_offset); | |
2206 | } | |
2207 | else if (h->root.type == bfd_link_hash_undefweak) | |
2208 | relocation = 0; | |
671bae9c | 2209 | else if (info->shared |
a85d7ed0 NC |
2210 | && !info->no_undefined |
2211 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
2212 | relocation = 0; | |
2213 | else | |
2214 | { | |
2215 | if (! ((*info->callbacks->undefined_symbol) | |
2216 | (info, h->root.root.string, input_bfd, | |
947216bf | 2217 | input_section, rel->r_offset, |
0451c93c MS |
2218 | (!info->shared || info->no_undefined |
2219 | || ELF_ST_VISIBILITY (h->other))))) | |
b34976b6 | 2220 | return FALSE; |
a85d7ed0 NC |
2221 | relocation = 0; |
2222 | } | |
2223 | } | |
2224 | ||
2225 | switch (r_type) | |
2226 | { | |
5236c819 MS |
2227 | case R_390_GOTPLT12: |
2228 | case R_390_GOTPLT16: | |
2229 | case R_390_GOTPLT32: | |
2230 | case R_390_GOTPLT64: | |
2231 | case R_390_GOTPLTENT: | |
2232 | /* There are three cases for a GOTPLT relocation. 1) The | |
2233 | relocation is against the jump slot entry of a plt that | |
2234 | will get emitted to the output file. 2) The relocation | |
2235 | is against the jump slot of a plt entry that has been | |
2236 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2237 | as replacement. 3) The relocation is against a local symbol. | |
2238 | Cases 2) and 3) are the same as the GOT relocation code | |
2239 | so we just have to test for case 1 and fall through for | |
2240 | the other two. */ | |
2241 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2242 | { | |
2243 | bfd_vma plt_index; | |
2244 | ||
2245 | /* Calc. index no. | |
2246 | Current offset - size first entry / entry size. */ | |
2247 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2248 | PLT_ENTRY_SIZE; | |
26e41594 | 2249 | |
5236c819 MS |
2250 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2251 | addr & GOT addr. */ | |
2252 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2253 | unresolved_reloc = FALSE; | |
2254 | ||
2255 | if (r_type == R_390_GOTPLTENT) | |
26e41594 | 2256 | relocation += htab->sgot->output_section->vma; |
5236c819 MS |
2257 | break; |
2258 | } | |
2259 | /* Fall through. */ | |
2260 | ||
947216bf AM |
2261 | case R_390_GOT12: |
2262 | case R_390_GOT16: | |
2263 | case R_390_GOT32: | |
2264 | case R_390_GOT64: | |
2265 | case R_390_GOTENT: | |
2266 | /* Relocation is to the entry for this symbol in the global | |
2267 | offset table. */ | |
0451c93c MS |
2268 | if (htab->sgot == NULL) |
2269 | abort (); | |
a85d7ed0 | 2270 | |
947216bf AM |
2271 | if (h != NULL) |
2272 | { | |
b34976b6 | 2273 | bfd_boolean dyn; |
a85d7ed0 | 2274 | |
947216bf | 2275 | off = h->got.offset; |
0451c93c | 2276 | dyn = htab->elf.dynamic_sections_created; |
947216bf AM |
2277 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
2278 | || (info->shared | |
2279 | && (info->symbolic | |
0451c93c MS |
2280 | || h->dynindx == -1 |
2281 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
947216bf AM |
2282 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
2283 | { | |
2284 | /* This is actually a static link, or it is a | |
2285 | -Bsymbolic link and the symbol is defined | |
2286 | locally, or the symbol was forced to be local | |
2287 | because of a version file. We must initialize | |
2288 | this entry in the global offset table. Since the | |
2289 | offset must always be a multiple of 2, we use the | |
2290 | least significant bit to record whether we have | |
2291 | initialized it already. | |
2292 | ||
2293 | When doing a dynamic link, we create a .rel.got | |
2294 | relocation entry to initialize the value. This | |
2295 | is done in the finish_dynamic_symbol routine. */ | |
2296 | if ((off & 1) != 0) | |
2297 | off &= ~1; | |
2298 | else | |
2299 | { | |
a85d7ed0 | 2300 | bfd_put_64 (output_bfd, relocation, |
0451c93c | 2301 | htab->sgot->contents + off); |
947216bf AM |
2302 | h->got.offset |= 1; |
2303 | } | |
2304 | } | |
0451c93c | 2305 | else |
b34976b6 | 2306 | unresolved_reloc = FALSE; |
947216bf AM |
2307 | } |
2308 | else | |
2309 | { | |
0451c93c MS |
2310 | if (local_got_offsets == NULL) |
2311 | abort (); | |
a85d7ed0 | 2312 | |
947216bf | 2313 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2314 | |
947216bf AM |
2315 | /* The offset must always be a multiple of 8. We use |
2316 | the least significant bit to record whether we have | |
2317 | already generated the necessary reloc. */ | |
2318 | if ((off & 1) != 0) | |
2319 | off &= ~1; | |
2320 | else | |
2321 | { | |
2322 | bfd_put_64 (output_bfd, relocation, | |
0451c93c | 2323 | htab->sgot->contents + off); |
a85d7ed0 | 2324 | |
947216bf AM |
2325 | if (info->shared) |
2326 | { | |
2327 | asection *s; | |
2328 | Elf_Internal_Rela outrel; | |
2329 | bfd_byte *loc; | |
a85d7ed0 | 2330 | |
947216bf AM |
2331 | s = htab->srelgot; |
2332 | if (s == NULL) | |
0451c93c | 2333 | abort (); |
a85d7ed0 | 2334 | |
947216bf AM |
2335 | outrel.r_offset = (htab->sgot->output_section->vma |
2336 | + htab->sgot->output_offset | |
2337 | + off); | |
2338 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2339 | outrel.r_addend = relocation; |
947216bf AM |
2340 | loc = s->contents; |
2341 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
2342 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2343 | } | |
a85d7ed0 | 2344 | |
947216bf AM |
2345 | local_got_offsets[r_symndx] |= 1; |
2346 | } | |
2347 | } | |
a85d7ed0 | 2348 | |
0451c93c MS |
2349 | if (off >= (bfd_vma) -2) |
2350 | abort (); | |
2351 | ||
2352 | relocation = htab->sgot->output_offset + off; | |
2353 | ||
ae9a127f NC |
2354 | /* For @GOTENT the relocation is against the offset between |
2355 | the instruction and the symbols entry in the GOT and not | |
2356 | between the start of the GOT and the symbols entry. We | |
2357 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2358 | if ( r_type == R_390_GOTENT |
2359 | || r_type == R_390_GOTPLTENT) | |
0451c93c | 2360 | relocation += htab->sgot->output_section->vma; |
a85d7ed0 | 2361 | |
947216bf | 2362 | break; |
99c79b2e | 2363 | |
5236c819 MS |
2364 | case R_390_GOTOFF16: |
2365 | case R_390_GOTOFF32: | |
2366 | case R_390_GOTOFF64: | |
947216bf AM |
2367 | /* Relocation is relative to the start of the global offset |
2368 | table. */ | |
a85d7ed0 | 2369 | |
947216bf AM |
2370 | /* Note that sgot->output_offset is not involved in this |
2371 | calculation. We always want the start of .got. If we | |
2372 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2373 | permitted by the ABI, we might have to change this | |
2374 | calculation. */ | |
2375 | relocation -= htab->sgot->output_section->vma; | |
947216bf | 2376 | break; |
a85d7ed0 | 2377 | |
947216bf | 2378 | case R_390_GOTPC: |
a85d7ed0 | 2379 | case R_390_GOTPCDBL: |
947216bf AM |
2380 | /* Use global offset table as symbol value. */ |
2381 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2382 | unresolved_reloc = FALSE; |
947216bf | 2383 | break; |
a85d7ed0 | 2384 | |
947216bf AM |
2385 | case R_390_PLT16DBL: |
2386 | case R_390_PLT32: | |
2387 | case R_390_PLT32DBL: | |
2388 | case R_390_PLT64: | |
2389 | /* Relocation is to the entry for this symbol in the | |
2390 | procedure linkage table. */ | |
a85d7ed0 | 2391 | |
947216bf AM |
2392 | /* Resolve a PLT32 reloc against a local symbol directly, |
2393 | without using the procedure linkage table. */ | |
2394 | if (h == NULL) | |
2395 | break; | |
a85d7ed0 | 2396 | |
947216bf | 2397 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2398 | || htab->splt == NULL) |
947216bf AM |
2399 | { |
2400 | /* We didn't make a PLT entry for this symbol. This | |
2401 | happens when statically linking PIC code, or when | |
2402 | using -Bsymbolic. */ | |
2403 | break; | |
2404 | } | |
2405 | ||
2406 | relocation = (htab->splt->output_section->vma | |
2407 | + htab->splt->output_offset | |
2408 | + h->plt.offset); | |
b34976b6 | 2409 | unresolved_reloc = FALSE; |
26e41594 | 2410 | break; |
5236c819 MS |
2411 | |
2412 | case R_390_PLTOFF16: | |
2413 | case R_390_PLTOFF32: | |
2414 | case R_390_PLTOFF64: | |
26e41594 AM |
2415 | /* Relocation is to the entry for this symbol in the |
2416 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2417 | |
2418 | /* For local symbols or if we didn't make a PLT entry for | |
2419 | this symbol resolve the symbol directly. */ | |
26e41594 | 2420 | if ( h == NULL |
5236c819 MS |
2421 | || h->plt.offset == (bfd_vma) -1 |
2422 | || htab->splt == NULL) | |
2423 | { | |
2424 | relocation -= htab->sgot->output_section->vma; | |
2425 | break; | |
2426 | } | |
2427 | ||
26e41594 AM |
2428 | relocation = (htab->splt->output_section->vma |
2429 | + htab->splt->output_offset | |
2430 | + h->plt.offset | |
5236c819 MS |
2431 | - htab->sgot->output_section->vma); |
2432 | unresolved_reloc = FALSE; | |
947216bf AM |
2433 | break; |
2434 | ||
2435 | case R_390_8: | |
2436 | case R_390_16: | |
2437 | case R_390_32: | |
2438 | case R_390_64: | |
2439 | case R_390_PC16: | |
2440 | case R_390_PC16DBL: | |
2441 | case R_390_PC32: | |
a85d7ed0 | 2442 | case R_390_PC32DBL: |
947216bf | 2443 | case R_390_PC64: |
ec338859 AM |
2444 | /* r_symndx will be zero only for relocs against symbols |
2445 | from removed linkonce sections, or sections discarded by | |
2446 | a linker script. */ | |
947216bf AM |
2447 | if (r_symndx == 0 |
2448 | || (input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
2449 | break; |
2450 | ||
947216bf | 2451 | if ((info->shared |
0451c93c MS |
2452 | && ((r_type != R_390_PC16 |
2453 | && r_type != R_390_PC16DBL | |
2454 | && r_type != R_390_PC32 | |
2455 | && r_type != R_390_PC32DBL | |
2456 | && r_type != R_390_PC64) | |
2457 | || (h != NULL | |
2458 | && h->dynindx != -1 | |
2459 | && (! info->symbolic | |
2460 | || (h->elf_link_hash_flags | |
2461 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
2462 | || (!info->shared | |
0451c93c MS |
2463 | && h != NULL |
2464 | && h->dynindx != -1 | |
2465 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
2466 | && (((h->elf_link_hash_flags | |
2467 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2468 | && (h->elf_link_hash_flags | |
2469 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2470 | || h->root.type == bfd_link_hash_undefweak | |
2471 | || h->root.type == bfd_link_hash_undefined))) | |
947216bf AM |
2472 | { |
2473 | Elf_Internal_Rela outrel; | |
b34976b6 | 2474 | bfd_boolean skip, relocate; |
0451c93c | 2475 | asection *sreloc; |
947216bf | 2476 | bfd_byte *loc; |
a85d7ed0 | 2477 | |
947216bf AM |
2478 | /* When generating a shared object, these relocations |
2479 | are copied into the output file to be resolved at run | |
2480 | time. */ | |
b34976b6 AM |
2481 | skip = FALSE; |
2482 | relocate = FALSE; | |
a85d7ed0 | 2483 | |
c629eae0 JJ |
2484 | outrel.r_offset = |
2485 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2486 | rel->r_offset); | |
2487 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2488 | skip = TRUE; |
0bb2d96a | 2489 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2490 | skip = TRUE, relocate = TRUE; |
a85d7ed0 | 2491 | |
947216bf AM |
2492 | outrel.r_offset += (input_section->output_section->vma |
2493 | + input_section->output_offset); | |
a85d7ed0 | 2494 | |
947216bf | 2495 | if (skip) |
0bb2d96a | 2496 | memset (&outrel, 0, sizeof outrel); |
947216bf | 2497 | else if (h != NULL |
0451c93c MS |
2498 | && h->dynindx != -1 |
2499 | && (r_type == R_390_PC16 | |
2500 | || r_type == R_390_PC16DBL | |
2501 | || r_type == R_390_PC32 | |
2502 | || r_type == R_390_PC32DBL | |
2503 | || r_type == R_390_PC64 | |
2504 | || !info->shared | |
2505 | || !info->symbolic | |
2506 | || (h->elf_link_hash_flags | |
2507 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
947216bf AM |
2508 | { |
2509 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
27018c3f | 2510 | outrel.r_addend = rel->r_addend; |
947216bf AM |
2511 | } |
2512 | else | |
2513 | { | |
0451c93c | 2514 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 2515 | relocate = TRUE; |
0451c93c MS |
2516 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
2517 | outrel.r_addend = relocation + rel->r_addend; | |
2518 | } | |
a85d7ed0 | 2519 | |
0451c93c MS |
2520 | sreloc = elf_section_data (input_section)->sreloc; |
2521 | if (sreloc == NULL) | |
2522 | abort (); | |
2523 | ||
947216bf AM |
2524 | loc = sreloc->contents; |
2525 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2526 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
a85d7ed0 | 2527 | |
947216bf AM |
2528 | /* If this reloc is against an external symbol, we do |
2529 | not want to fiddle with the addend. Otherwise, we | |
2530 | need to include the symbol value so that it becomes | |
2531 | an addend for the dynamic reloc. */ | |
2532 | if (! relocate) | |
2533 | continue; | |
2534 | } | |
a85d7ed0 | 2535 | |
947216bf | 2536 | break; |
a85d7ed0 | 2537 | |
69fc87f1 MS |
2538 | /* Relocations for tls literal pool entries. */ |
2539 | case R_390_TLS_IE64: | |
2540 | if (info->shared) | |
2541 | { | |
2542 | Elf_Internal_Rela outrel; | |
2543 | asection *sreloc; | |
2544 | bfd_byte *loc; | |
2545 | ||
2546 | outrel.r_offset = rel->r_offset | |
2547 | + input_section->output_section->vma | |
2548 | + input_section->output_offset; | |
2549 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
2550 | sreloc = elf_section_data (input_section)->sreloc; | |
2551 | if (sreloc == NULL) | |
2552 | abort (); | |
2553 | loc = sreloc->contents; | |
2554 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2555 | bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); | |
2556 | } | |
ae9a127f | 2557 | /* Fall through. */ |
69fc87f1 MS |
2558 | |
2559 | case R_390_TLS_GD64: | |
2560 | case R_390_TLS_GOTIE64: | |
2561 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2562 | tls_type = GOT_UNKNOWN; | |
2563 | if (h == NULL && local_got_offsets) | |
2564 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2565 | else if (h != NULL) | |
2566 | { | |
2567 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2568 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2569 | r_type = R_390_TLS_LE64; | |
2570 | } | |
2571 | if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) | |
2572 | r_type = R_390_TLS_IE64; | |
2573 | ||
2574 | if (r_type == R_390_TLS_LE64) | |
2575 | { | |
2576 | /* This relocation gets optimized away by the local exec | |
2577 | access optimization. */ | |
2578 | BFD_ASSERT (! unresolved_reloc); | |
2579 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2580 | contents + rel->r_offset); | |
2581 | continue; | |
2582 | } | |
2583 | ||
2584 | if (htab->sgot == NULL) | |
2585 | abort (); | |
2586 | ||
2587 | if (h != NULL) | |
2588 | off = h->got.offset; | |
2589 | else | |
2590 | { | |
2591 | if (local_got_offsets == NULL) | |
2592 | abort (); | |
2593 | ||
2594 | off = local_got_offsets[r_symndx]; | |
2595 | } | |
2596 | ||
2597 | emit_tls_relocs: | |
2598 | ||
2599 | if ((off & 1) != 0) | |
2600 | off &= ~1; | |
26e41594 | 2601 | else |
69fc87f1 MS |
2602 | { |
2603 | Elf_Internal_Rela outrel; | |
2604 | bfd_byte *loc; | |
2605 | int dr_type, indx; | |
2606 | ||
2607 | if (htab->srelgot == NULL) | |
2608 | abort (); | |
2609 | ||
2610 | outrel.r_offset = (htab->sgot->output_section->vma | |
2611 | + htab->sgot->output_offset + off); | |
2612 | ||
2613 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2614 | if (r_type == R_390_TLS_GD64) | |
2615 | dr_type = R_390_TLS_DTPMOD; | |
2616 | else | |
2617 | dr_type = R_390_TLS_TPOFF; | |
2618 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2619 | outrel.r_addend = relocation - dtpoff_base (info); | |
2620 | else | |
2621 | outrel.r_addend = 0; | |
2622 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2623 | loc = htab->srelgot->contents; | |
2624 | loc += htab->srelgot->reloc_count++ | |
2625 | * sizeof (Elf64_External_Rela); | |
2626 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2627 | ||
2628 | if (r_type == R_390_TLS_GD64) | |
2629 | { | |
2630 | if (indx == 0) | |
2631 | { | |
2632 | BFD_ASSERT (! unresolved_reloc); | |
2633 | bfd_put_64 (output_bfd, | |
2634 | relocation - dtpoff_base (info), | |
2635 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2636 | } | |
2637 | else | |
2638 | { | |
2639 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); | |
2640 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2641 | outrel.r_addend = 0; | |
2642 | htab->srelgot->reloc_count++; | |
2643 | loc += sizeof (Elf64_External_Rela); | |
2644 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2645 | } | |
2646 | } | |
2647 | ||
2648 | if (h != NULL) | |
2649 | h->got.offset |= 1; | |
2650 | else | |
2651 | local_got_offsets[r_symndx] |= 1; | |
2652 | } | |
2653 | ||
2654 | if (off >= (bfd_vma) -2) | |
2655 | abort (); | |
2656 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2657 | { | |
2658 | relocation = htab->sgot->output_offset + off; | |
2659 | if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) | |
2660 | relocation += htab->sgot->output_section->vma; | |
2661 | unresolved_reloc = FALSE; | |
2662 | } | |
2663 | else | |
2664 | { | |
2665 | bfd_put_64 (output_bfd, htab->sgot->output_offset + off, | |
2666 | contents + rel->r_offset); | |
2667 | continue; | |
2668 | } | |
2669 | break; | |
2670 | ||
2671 | case R_390_TLS_GOTIE12: | |
2672 | case R_390_TLS_IEENT: | |
2673 | if (h == NULL) | |
2674 | { | |
2675 | if (local_got_offsets == NULL) | |
2676 | abort(); | |
2677 | off = local_got_offsets[r_symndx]; | |
2678 | if (info->shared) | |
2679 | goto emit_tls_relocs; | |
2680 | } | |
2681 | else | |
2682 | { | |
2683 | off = h->got.offset; | |
2684 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2685 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2686 | goto emit_tls_relocs; | |
2687 | } | |
2688 | ||
2689 | if (htab->sgot == NULL) | |
2690 | abort (); | |
2691 | ||
2692 | BFD_ASSERT (! unresolved_reloc); | |
2693 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2694 | htab->sgot->contents + off); | |
2695 | relocation = htab->sgot->output_offset + off; | |
2696 | if (r_type == R_390_TLS_IEENT) | |
2697 | relocation += htab->sgot->output_section->vma; | |
2698 | unresolved_reloc = FALSE; | |
2699 | break; | |
2700 | ||
2701 | case R_390_TLS_LDM64: | |
2702 | if (! info->shared) | |
2703 | /* The literal pool entry this relocation refers to gets ignored | |
2704 | by the optimized code of the local exec model. Do nothing | |
2705 | and the value will turn out zero. */ | |
2706 | continue; | |
2707 | ||
2708 | if (htab->sgot == NULL) | |
2709 | abort (); | |
2710 | ||
2711 | off = htab->tls_ldm_got.offset; | |
2712 | if (off & 1) | |
2713 | off &= ~1; | |
2714 | else | |
2715 | { | |
2716 | Elf_Internal_Rela outrel; | |
2717 | bfd_byte *loc; | |
2718 | ||
2719 | if (htab->srelgot == NULL) | |
2720 | abort (); | |
2721 | ||
2722 | outrel.r_offset = (htab->sgot->output_section->vma | |
2723 | + htab->sgot->output_offset + off); | |
2724 | ||
2725 | bfd_put_64 (output_bfd, 0, | |
2726 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2727 | outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); | |
2728 | outrel.r_addend = 0; | |
2729 | loc = htab->srelgot->contents; | |
2730 | loc += htab->srelgot->reloc_count++ | |
2731 | * sizeof (Elf64_External_Rela); | |
2732 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2733 | htab->tls_ldm_got.offset |= 1; | |
2734 | } | |
2735 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2736 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2737 | break; |
2738 | ||
2739 | case R_390_TLS_LE64: | |
2740 | if (info->shared) | |
2741 | { | |
2742 | /* Linking a shared library with non-fpic code requires | |
2743 | a R_390_TLS_TPOFF relocation. */ | |
2744 | Elf_Internal_Rela outrel; | |
2745 | asection *sreloc; | |
2746 | bfd_byte *loc; | |
2747 | int indx; | |
2748 | ||
2749 | outrel.r_offset = rel->r_offset | |
2750 | + input_section->output_section->vma | |
2751 | + input_section->output_offset; | |
2752 | if (h != NULL && h->dynindx != -1) | |
2753 | indx = h->dynindx; | |
2754 | else | |
2755 | indx = 0; | |
2756 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); | |
2757 | if (indx == 0) | |
2758 | outrel.r_addend = relocation - dtpoff_base (info); | |
2759 | else | |
2760 | outrel.r_addend = 0; | |
2761 | sreloc = elf_section_data (input_section)->sreloc; | |
2762 | if (sreloc == NULL) | |
2763 | abort (); | |
2764 | loc = sreloc->contents; | |
2765 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2766 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2767 | } | |
2768 | else | |
2769 | { | |
2770 | BFD_ASSERT (! unresolved_reloc); | |
2771 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2772 | contents + rel->r_offset); | |
2773 | } | |
2774 | continue; | |
2775 | ||
2776 | case R_390_TLS_LDO64: | |
2777 | if (info->shared || (input_section->flags & SEC_CODE) == 0) | |
2778 | relocation -= dtpoff_base (info); | |
2779 | else | |
2780 | /* When converting LDO to LE, we must negate. */ | |
2781 | relocation = -tpoff (info, relocation); | |
2782 | break; | |
2783 | ||
2784 | /* Relocations for tls instructions. */ | |
2785 | case R_390_TLS_LOAD: | |
2786 | case R_390_TLS_GDCALL: | |
2787 | case R_390_TLS_LDCALL: | |
2788 | tls_type = GOT_UNKNOWN; | |
2789 | if (h == NULL && local_got_offsets) | |
2790 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2791 | else if (h != NULL) | |
2792 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2793 | ||
2794 | if (tls_type == GOT_TLS_GD) | |
2795 | continue; | |
2796 | ||
2797 | if (r_type == R_390_TLS_LOAD) | |
2798 | { | |
2799 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2800 | { | |
2801 | /* IE->LE transition. Four valid cases: | |
2802 | lg %rx,(0,%ry) -> sllg %rx,%ry,0 | |
2803 | lg %rx,(%ry,0) -> sllg %rx,%ry,0 | |
2804 | lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 | |
2805 | lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2806 | unsigned int insn0, insn1, ry; | |
2807 | ||
2808 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2809 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2810 | if (insn1 != 0x0004) | |
2811 | invalid_tls_insn (input_bfd, input_section, rel); | |
2812 | ry = 0; | |
2813 | if ((insn0 & 0xff00f000) == 0xe3000000) | |
2814 | /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ | |
2815 | ry = (insn0 & 0x000f0000); | |
2816 | else if ((insn0 & 0xff0f0000) == 0xe3000000) | |
2817 | /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ | |
2818 | ry = (insn0 & 0x0000f000) << 4; | |
2819 | else if ((insn0 & 0xff00f000) == 0xe300c000) | |
2820 | /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ | |
2821 | ry = (insn0 & 0x000f0000); | |
2822 | else if ((insn0 & 0xff0f0000) == 0xe30c0000) | |
2823 | /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2824 | ry = (insn0 & 0x0000f000) << 4; | |
2825 | else | |
2826 | invalid_tls_insn (input_bfd, input_section, rel); | |
2827 | insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; | |
2828 | insn1 = 0x000d; | |
2829 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2830 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2831 | } | |
2832 | } | |
2833 | else if (r_type == R_390_TLS_GDCALL) | |
2834 | { | |
2835 | unsigned int insn0, insn1; | |
2836 | ||
2837 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2838 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2839 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2840 | invalid_tls_insn (input_bfd, input_section, rel); | |
2841 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2842 | { | |
2843 | /* GD->LE transition. | |
2844 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2845 | insn0 = 0xc0040000; | |
2846 | insn1 = 0x0000; | |
2847 | } | |
2848 | else | |
2849 | { | |
2850 | /* GD->IE transition. | |
2851 | brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ | |
2852 | insn0 = 0xe322c000; | |
2853 | insn1 = 0x0004; | |
2854 | } | |
2855 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2856 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2857 | } | |
2858 | else if (r_type == R_390_TLS_LDCALL) | |
2859 | { | |
2860 | if (!info->shared) | |
2861 | { | |
2862 | unsigned int insn0, insn1; | |
2863 | ||
2864 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2865 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2866 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2867 | invalid_tls_insn (input_bfd, input_section, rel); | |
2868 | /* LD->LE transition. | |
2869 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2870 | insn0 = 0xc0040000; | |
2871 | insn1 = 0x0000; | |
2872 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2873 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2874 | } | |
2875 | } | |
2876 | continue; | |
2877 | ||
947216bf AM |
2878 | default: |
2879 | break; | |
2880 | } | |
a85d7ed0 | 2881 | |
239e1f3a AM |
2882 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2883 | because such sections are not SEC_ALLOC and thus ld.so will | |
2884 | not process them. */ | |
0451c93c | 2885 | if (unresolved_reloc |
239e1f3a | 2886 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
0451c93c MS |
2887 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
2888 | (*_bfd_error_handler) | |
2889 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
2890 | bfd_archive_filename (input_bfd), | |
2891 | bfd_get_section_name (input_bfd, input_section), | |
2892 | (long) rel->r_offset, | |
2893 | h->root.root.string); | |
2894 | ||
a85d7ed0 NC |
2895 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
2896 | contents, rel->r_offset, | |
2897 | relocation, rel->r_addend); | |
2898 | ||
2899 | if (r != bfd_reloc_ok) | |
2900 | { | |
0451c93c | 2901 | const char *name; |
ec338859 | 2902 | |
0451c93c MS |
2903 | if (h != NULL) |
2904 | name = h->root.root.string; | |
2905 | else | |
a85d7ed0 | 2906 | { |
0451c93c MS |
2907 | name = bfd_elf_string_from_elf_section (input_bfd, |
2908 | symtab_hdr->sh_link, | |
2909 | sym->st_name); | |
2910 | if (name == NULL) | |
b34976b6 | 2911 | return FALSE; |
0451c93c MS |
2912 | if (*name == '\0') |
2913 | name = bfd_section_name (input_bfd, sec); | |
2914 | } | |
ec338859 | 2915 | |
0451c93c MS |
2916 | if (r == bfd_reloc_overflow) |
2917 | { | |
ec338859 | 2918 | |
0451c93c MS |
2919 | if (! ((*info->callbacks->reloc_overflow) |
2920 | (info, name, howto->name, (bfd_vma) 0, | |
2921 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 2922 | return FALSE; |
0451c93c MS |
2923 | } |
2924 | else | |
2925 | { | |
2926 | (*_bfd_error_handler) | |
2927 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
2928 | bfd_archive_filename (input_bfd), | |
2929 | bfd_get_section_name (input_bfd, input_section), | |
2930 | (long) rel->r_offset, name, (int) r); | |
b34976b6 | 2931 | return FALSE; |
a85d7ed0 NC |
2932 | } |
2933 | } | |
2934 | } | |
2935 | ||
b34976b6 | 2936 | return TRUE; |
a85d7ed0 NC |
2937 | } |
2938 | ||
2939 | /* Finish up dynamic symbol handling. We set the contents of various | |
2940 | dynamic sections here. */ | |
2941 | ||
b34976b6 | 2942 | static bfd_boolean |
a85d7ed0 NC |
2943 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
2944 | bfd *output_bfd; | |
2945 | struct bfd_link_info *info; | |
2946 | struct elf_link_hash_entry *h; | |
2947 | Elf_Internal_Sym *sym; | |
2948 | { | |
0451c93c | 2949 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 | 2950 | |
0451c93c | 2951 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2952 | |
2953 | if (h->plt.offset != (bfd_vma) -1) | |
2954 | { | |
a85d7ed0 | 2955 | bfd_vma plt_index; |
0451c93c MS |
2956 | bfd_vma got_offset; |
2957 | Elf_Internal_Rela rela; | |
947216bf | 2958 | bfd_byte *loc; |
a85d7ed0 NC |
2959 | |
2960 | /* This symbol has an entry in the procedure linkage table. Set | |
947216bf | 2961 | it up. */ |
a85d7ed0 | 2962 | |
0451c93c MS |
2963 | if (h->dynindx == -1 |
2964 | || htab->splt == NULL | |
2965 | || htab->sgotplt == NULL | |
2966 | || htab->srelplt == NULL) | |
2967 | abort (); | |
a85d7ed0 | 2968 | |
99c79b2e | 2969 | /* Calc. index no. |
947216bf | 2970 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
2971 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
2972 | ||
2973 | /* Offset in GOT is PLT index plus GOT headers(3) times 8, | |
947216bf | 2974 | addr & GOT addr. */ |
a85d7ed0 NC |
2975 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
2976 | ||
2977 | /* Fill in the blueprint of a PLT. */ | |
0451c93c MS |
2978 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
2979 | htab->splt->contents + h->plt.offset); | |
2980 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
2981 | htab->splt->contents + h->plt.offset + 4); | |
2982 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
2983 | htab->splt->contents + h->plt.offset + 8); | |
2984 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
2985 | htab->splt->contents + h->plt.offset + 12); | |
2986 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
2987 | htab->splt->contents + h->plt.offset + 16); | |
2988 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5, | |
2989 | htab->splt->contents + h->plt.offset + 20); | |
2990 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6, | |
2991 | htab->splt->contents + h->plt.offset + 24); | |
2992 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7, | |
2993 | htab->splt->contents + h->plt.offset + 28); | |
a85d7ed0 NC |
2994 | /* Fixup the relative address to the GOT entry */ |
2995 | bfd_put_32 (output_bfd, | |
0451c93c MS |
2996 | (htab->sgotplt->output_section->vma + |
2997 | htab->sgotplt->output_offset + got_offset | |
2998 | - (htab->splt->output_section->vma + h->plt.offset))/2, | |
2999 | htab->splt->contents + h->plt.offset + 2); | |
a85d7ed0 NC |
3000 | /* Fixup the relative branch to PLT 0 */ |
3001 | bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + | |
3002 | (PLT_ENTRY_SIZE * plt_index) + 22)/2, | |
0451c93c | 3003 | htab->splt->contents + h->plt.offset + 24); |
a85d7ed0 NC |
3004 | /* Fixup offset into symbol table */ |
3005 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), | |
0451c93c | 3006 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3007 | |
3008 | /* Fill in the entry in the global offset table. | |
947216bf | 3009 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3010 | bfd_put_64 (output_bfd, |
0451c93c MS |
3011 | (htab->splt->output_section->vma |
3012 | + htab->splt->output_offset | |
a85d7ed0 NC |
3013 | + h->plt.offset |
3014 | + 14), | |
0451c93c | 3015 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3016 | |
0451c93c MS |
3017 | /* Fill in the entry in the .rela.plt section. */ |
3018 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3019 | + htab->sgotplt->output_offset | |
3020 | + got_offset); | |
3021 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3022 | rela.r_addend = 0; | |
947216bf | 3023 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
0451c93c | 3024 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3025 | |
3026 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3027 | { | |
3028 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3029 | the .plt section. Leave the value alone. This is a clue |
3030 | for the dynamic linker, to make function pointer | |
3031 | comparisons work between an application and shared | |
3032 | library. */ | |
a85d7ed0 NC |
3033 | sym->st_shndx = SHN_UNDEF; |
3034 | } | |
3035 | } | |
3036 | ||
69fc87f1 MS |
3037 | if (h->got.offset != (bfd_vma) -1 |
3038 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3039 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3040 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3041 | { |
a85d7ed0 | 3042 | Elf_Internal_Rela rela; |
947216bf | 3043 | bfd_byte *loc; |
a85d7ed0 NC |
3044 | |
3045 | /* This symbol has an entry in the global offset table. Set it | |
947216bf | 3046 | up. */ |
0451c93c MS |
3047 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3048 | abort (); | |
a85d7ed0 | 3049 | |
0451c93c MS |
3050 | rela.r_offset = (htab->sgot->output_section->vma |
3051 | + htab->sgot->output_offset | |
dc810e39 | 3052 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3053 | |
3054 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3055 | symbol is defined locally or was forced to be local because | |
3056 | of a version file, we just want to emit a RELATIVE reloc. | |
3057 | The entry in the global offset table will already have been | |
3058 | initialized in the relocate_section function. */ | |
0451c93c MS |
3059 | if (info->shared |
3060 | && (info->symbolic | |
3061 | || h->dynindx == -1 | |
3062 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
3063 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
947216bf | 3064 | { |
0451c93c | 3065 | BFD_ASSERT((h->got.offset & 1) != 0); |
947216bf AM |
3066 | rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
3067 | rela.r_addend = (h->root.u.def.value | |
3068 | + h->root.u.def.section->output_section->vma | |
3069 | + h->root.u.def.section->output_offset); | |
3070 | } | |
a85d7ed0 NC |
3071 | else |
3072 | { | |
3073 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3074 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3075 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); |
947216bf AM |
3076 | rela.r_addend = 0; |
3077 | } | |
a85d7ed0 | 3078 | |
947216bf AM |
3079 | loc = htab->srelgot->contents; |
3080 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3081 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3082 | } |
3083 | ||
3084 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3085 | { | |
a85d7ed0 | 3086 | Elf_Internal_Rela rela; |
947216bf | 3087 | bfd_byte *loc; |
a85d7ed0 NC |
3088 | |
3089 | /* This symbols needs a copy reloc. Set it up. */ | |
3090 | ||
0451c93c MS |
3091 | if (h->dynindx == -1 |
3092 | || (h->root.type != bfd_link_hash_defined | |
3093 | && h->root.type != bfd_link_hash_defweak) | |
3094 | || htab->srelbss == NULL) | |
3095 | abort (); | |
a85d7ed0 NC |
3096 | |
3097 | rela.r_offset = (h->root.u.def.value | |
3098 | + h->root.u.def.section->output_section->vma | |
3099 | + h->root.u.def.section->output_offset); | |
3100 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); | |
3101 | rela.r_addend = 0; | |
947216bf AM |
3102 | loc = htab->srelbss->contents; |
3103 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3104 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3105 | } |
3106 | ||
3107 | /* Mark some specially defined symbols as absolute. */ | |
3108 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3109 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3110 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3111 | sym->st_shndx = SHN_ABS; | |
3112 | ||
b34976b6 | 3113 | return TRUE; |
a85d7ed0 NC |
3114 | } |
3115 | ||
0451c93c MS |
3116 | /* Used to decide how to sort relocs in an optimal manner for the |
3117 | dynamic linker, before writing them out. */ | |
3118 | ||
3119 | static enum elf_reloc_type_class | |
3120 | elf_s390_reloc_type_class (rela) | |
3121 | const Elf_Internal_Rela *rela; | |
3122 | { | |
3123 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3124 | { | |
3125 | case R_390_RELATIVE: | |
3126 | return reloc_class_relative; | |
3127 | case R_390_JMP_SLOT: | |
3128 | return reloc_class_plt; | |
3129 | case R_390_COPY: | |
3130 | return reloc_class_copy; | |
3131 | default: | |
3132 | return reloc_class_normal; | |
3133 | } | |
3134 | } | |
3135 | ||
a85d7ed0 NC |
3136 | /* Finish up the dynamic sections. */ |
3137 | ||
b34976b6 | 3138 | static bfd_boolean |
a85d7ed0 NC |
3139 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3140 | bfd *output_bfd; | |
3141 | struct bfd_link_info *info; | |
3142 | { | |
0451c93c | 3143 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3144 | bfd *dynobj; |
3145 | asection *sdyn; | |
a85d7ed0 | 3146 | |
0451c93c MS |
3147 | htab = elf_s390_hash_table (info); |
3148 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3149 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3150 | ||
0451c93c | 3151 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3152 | { |
a85d7ed0 NC |
3153 | Elf64_External_Dyn *dyncon, *dynconend; |
3154 | ||
0451c93c MS |
3155 | if (sdyn == NULL || htab->sgot == NULL) |
3156 | abort (); | |
a85d7ed0 NC |
3157 | |
3158 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
3159 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
3160 | for (; dyncon < dynconend; dyncon++) | |
3161 | { | |
3162 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3163 | asection *s; |
ec338859 | 3164 | |
a85d7ed0 | 3165 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3166 | |
a85d7ed0 NC |
3167 | switch (dyn.d_tag) |
3168 | { | |
3169 | default: | |
0451c93c | 3170 | continue; |
ec338859 | 3171 | |
a85d7ed0 | 3172 | case DT_PLTGOT: |
0451c93c MS |
3173 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3174 | break; | |
ec338859 | 3175 | |
a85d7ed0 | 3176 | case DT_JMPREL: |
0451c93c | 3177 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 | 3178 | break; |
ec338859 | 3179 | |
a85d7ed0 | 3180 | case DT_PLTRELSZ: |
0451c93c | 3181 | s = htab->srelplt->output_section; |
a85d7ed0 NC |
3182 | if (s->_cooked_size != 0) |
3183 | dyn.d_un.d_val = s->_cooked_size; | |
3184 | else | |
3185 | dyn.d_un.d_val = s->_raw_size; | |
a85d7ed0 | 3186 | break; |
ec338859 | 3187 | |
a85d7ed0 NC |
3188 | case DT_RELASZ: |
3189 | /* The procedure linkage table relocs (DT_JMPREL) should | |
3190 | not be included in the overall relocs (DT_RELA). | |
3191 | Therefore, we override the DT_RELASZ entry here to | |
3192 | make it not include the JMPREL relocs. Since the | |
3193 | linker script arranges for .rela.plt to follow all | |
3194 | other relocation sections, we don't have to worry | |
3195 | about changing the DT_RELA entry. */ | |
0451c93c MS |
3196 | s = htab->srelplt->output_section; |
3197 | if (s->_cooked_size != 0) | |
3198 | dyn.d_un.d_val -= s->_cooked_size; | |
3199 | else | |
3200 | dyn.d_un.d_val -= s->_raw_size; | |
a85d7ed0 NC |
3201 | break; |
3202 | } | |
0451c93c MS |
3203 | |
3204 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3205 | } |
3206 | ||
3207 | /* Fill in the special first entry in the procedure linkage table. */ | |
0451c93c | 3208 | if (htab->splt && htab->splt->_raw_size > 0) |
a85d7ed0 NC |
3209 | { |
3210 | /* fill in blueprint for plt 0 entry */ | |
0451c93c MS |
3211 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0, |
3212 | htab->splt->contents ); | |
3213 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3214 | htab->splt->contents +4 ); | |
3215 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3216 | htab->splt->contents +12 ); | |
3217 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3218 | htab->splt->contents +16 ); | |
3219 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3220 | htab->splt->contents +20 ); | |
3221 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6, | |
3222 | htab->splt->contents + 24); | |
3223 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7, | |
3224 | htab->splt->contents + 28 ); | |
a85d7ed0 NC |
3225 | /* Fixup relative address to start of GOT */ |
3226 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3227 | (htab->sgotplt->output_section->vma + |
3228 | htab->sgotplt->output_offset | |
3229 | - htab->splt->output_section->vma - 6)/2, | |
3230 | htab->splt->contents + 8); | |
a85d7ed0 | 3231 | } |
0451c93c MS |
3232 | elf_section_data (htab->splt->output_section) |
3233 | ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; | |
a85d7ed0 NC |
3234 | } |
3235 | ||
0451c93c | 3236 | if (htab->sgotplt) |
a85d7ed0 | 3237 | { |
0451c93c MS |
3238 | /* Fill in the first three entries in the global offset table. */ |
3239 | if (htab->sgotplt->_raw_size > 0) | |
3240 | { | |
3241 | bfd_put_64 (output_bfd, | |
3242 | (sdyn == NULL ? (bfd_vma) 0 | |
3243 | : sdyn->output_section->vma + sdyn->output_offset), | |
3244 | htab->sgotplt->contents); | |
3245 | /* One entry for shared object struct ptr. */ | |
3246 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3247 | /* One entry for _dl_runtime_resolve. */ | |
3248 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12); | |
3249 | } | |
a85d7ed0 | 3250 | |
0451c93c MS |
3251 | elf_section_data (htab->sgot->output_section) |
3252 | ->this_hdr.sh_entsize = 8; | |
3253 | } | |
b34976b6 | 3254 | return TRUE; |
a85d7ed0 NC |
3255 | } |
3256 | ||
ae9a127f NC |
3257 | /* Why was the hash table entry size definition changed from |
3258 | ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and | |
3259 | this is the only reason for the s390_elf64_size_info structure. */ | |
a85d7ed0 NC |
3260 | |
3261 | const struct elf_size_info s390_elf64_size_info = | |
3262 | { | |
3263 | sizeof (Elf64_External_Ehdr), | |
3264 | sizeof (Elf64_External_Phdr), | |
3265 | sizeof (Elf64_External_Shdr), | |
3266 | sizeof (Elf64_External_Rel), | |
3267 | sizeof (Elf64_External_Rela), | |
3268 | sizeof (Elf64_External_Sym), | |
3269 | sizeof (Elf64_External_Dyn), | |
3270 | sizeof (Elf_External_Note), | |
ae9a127f NC |
3271 | 8, /* hash-table entry size. */ |
3272 | 1, /* internal relocations per external relocations. */ | |
3273 | 64, /* arch_size. */ | |
45d6a902 | 3274 | 3, /* log_file_align. */ |
a85d7ed0 NC |
3275 | ELFCLASS64, EV_CURRENT, |
3276 | bfd_elf64_write_out_phdrs, | |
3277 | bfd_elf64_write_shdrs_and_ehdr, | |
3278 | bfd_elf64_write_relocs, | |
73ff0d56 | 3279 | bfd_elf64_swap_symbol_in, |
a85d7ed0 NC |
3280 | bfd_elf64_swap_symbol_out, |
3281 | bfd_elf64_slurp_reloc_table, | |
3282 | bfd_elf64_slurp_symbol_table, | |
3283 | bfd_elf64_swap_dyn_in, | |
3284 | bfd_elf64_swap_dyn_out, | |
947216bf AM |
3285 | bfd_elf64_swap_reloc_in, |
3286 | bfd_elf64_swap_reloc_out, | |
3287 | bfd_elf64_swap_reloca_in, | |
3288 | bfd_elf64_swap_reloca_out | |
a85d7ed0 NC |
3289 | }; |
3290 | ||
3291 | #define TARGET_BIG_SYM bfd_elf64_s390_vec | |
3292 | #define TARGET_BIG_NAME "elf64-s390" | |
3293 | #define ELF_ARCH bfd_arch_s390 | |
3294 | #define ELF_MACHINE_CODE EM_S390 | |
3295 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3296 | #define ELF_MAXPAGESIZE 0x1000 | |
3297 | ||
3298 | #define elf_backend_size_info s390_elf64_size_info | |
3299 | ||
3300 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3301 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3302 | #define elf_backend_want_got_plt 1 |
3303 | #define elf_backend_plt_readonly 1 | |
3304 | #define elf_backend_want_plt_sym 0 | |
3305 | #define elf_backend_got_header_size 24 | |
3306 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
b491616a | 3307 | #define elf_backend_rela_normal 1 |
a85d7ed0 NC |
3308 | |
3309 | #define elf_info_to_howto elf_s390_info_to_howto | |
3310 | ||
a85d7ed0 NC |
3311 | #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name |
3312 | #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3313 | #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
3314 | ||
3315 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
3316 | #define elf_backend_check_relocs elf_s390_check_relocs | |
0451c93c MS |
3317 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3318 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3319 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3320 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
3321 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook | |
3322 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3323 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
a85d7ed0 NC |
3324 | #define elf_backend_relocate_section elf_s390_relocate_section |
3325 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections | |
29c2fb7c | 3326 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
a85d7ed0 | 3327 | |
69fc87f1 MS |
3328 | #define bfd_elf64_mkobject elf_s390_mkobject |
3329 | #define elf_backend_object_p elf_s390_object_p | |
a85d7ed0 NC |
3330 | |
3331 | #include "elf64-target.h" |