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 | |
9c5bfbb7 | 43 | PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *, |
b48fa14c | 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 *)); | |
bd1ea41b MS |
89 | static bfd_reloc_status_type s390_elf_ldisp_reloc |
90 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
a85d7ed0 | 91 | |
a85d7ed0 NC |
92 | #include "elf/s390.h" |
93 | ||
94 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
95 | from smaller values. Start with zero, widen, *then* decrement. */ | |
96 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
97 | ||
98 | /* The relocation "howto" table. */ | |
99 | static reloc_howto_type elf_howto_table[] = | |
100 | { | |
101 | HOWTO (R_390_NONE, /* type */ | |
102 | 0, /* rightshift */ | |
103 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
104 | 0, /* bitsize */ | |
b34976b6 | 105 | FALSE, /* pc_relative */ |
a85d7ed0 NC |
106 | 0, /* bitpos */ |
107 | complain_overflow_dont, /* complain_on_overflow */ | |
108 | bfd_elf_generic_reloc, /* special_function */ | |
109 | "R_390_NONE", /* name */ | |
b34976b6 | 110 | FALSE, /* partial_inplace */ |
a85d7ed0 NC |
111 | 0, /* src_mask */ |
112 | 0, /* dst_mask */ | |
b34976b6 AM |
113 | FALSE), /* pcrel_offset */ |
114 | ||
5236c819 MS |
115 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
116 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), | |
117 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
118 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), | |
119 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), | |
121 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
122 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), | |
123 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
124 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), | |
15f8604d | 125 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, |
5236c819 MS |
126 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
127 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
128 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), | |
129 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
130 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), | |
131 | HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
132 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), | |
133 | HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
134 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), | |
135 | HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
136 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), | |
137 | HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
138 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), | |
139 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
140 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), | |
141 | HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
142 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), | |
143 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
144 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), | |
145 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
146 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), | |
147 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
148 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), | |
149 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
150 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), | |
151 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
152 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), | |
153 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
154 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), | |
155 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
156 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), | |
157 | HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
158 | bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), | |
159 | HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
160 | bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), | |
161 | HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
162 | bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), | |
163 | HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
164 | bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), | |
165 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
166 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), | |
167 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
168 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
169 | HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
170 | bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
171 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
172 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), | |
173 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
174 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), | |
175 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
176 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), | |
177 | HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
178 | bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), | |
179 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
180 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), | |
181 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
182 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
183 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
184 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), | |
185 | HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
186 | bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
69fc87f1 MS |
187 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
188 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), | |
189 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
190 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), | |
191 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
192 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), | |
193 | EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ | |
194 | HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), | |
196 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
197 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), | |
198 | EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ | |
199 | HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
200 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), | |
201 | EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ | |
202 | HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
203 | bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), | |
204 | EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ | |
205 | HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
206 | bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), | |
207 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
208 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), | |
209 | EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ | |
210 | HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
211 | bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), | |
212 | EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ | |
213 | HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
214 | bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), | |
215 | HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
216 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), | |
217 | HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
218 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
219 | HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
220 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
bd1ea41b MS |
221 | HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
222 | s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), | |
223 | HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
224 | s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), | |
225 | HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
226 | s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), | |
227 | HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
228 | s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), | |
a85d7ed0 NC |
229 | }; |
230 | ||
231 | /* GNU extension to record C++ vtable hierarchy. */ | |
232 | static reloc_howto_type elf64_s390_vtinherit_howto = | |
b34976b6 | 233 | HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
a85d7ed0 | 234 | static reloc_howto_type elf64_s390_vtentry_howto = |
b34976b6 | 235 | 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 |
236 | |
237 | static reloc_howto_type * | |
238 | elf_s390_reloc_type_lookup (abfd, code) | |
239 | bfd *abfd ATTRIBUTE_UNUSED; | |
240 | bfd_reloc_code_real_type code; | |
241 | { | |
0451c93c MS |
242 | switch (code) |
243 | { | |
244 | case BFD_RELOC_NONE: | |
245 | return &elf_howto_table[(int) R_390_NONE]; | |
246 | case BFD_RELOC_8: | |
247 | return &elf_howto_table[(int) R_390_8]; | |
248 | case BFD_RELOC_390_12: | |
249 | return &elf_howto_table[(int) R_390_12]; | |
250 | case BFD_RELOC_16: | |
251 | return &elf_howto_table[(int) R_390_16]; | |
252 | case BFD_RELOC_32: | |
253 | return &elf_howto_table[(int) R_390_32]; | |
254 | case BFD_RELOC_CTOR: | |
255 | return &elf_howto_table[(int) R_390_32]; | |
256 | case BFD_RELOC_32_PCREL: | |
257 | return &elf_howto_table[(int) R_390_PC32]; | |
258 | case BFD_RELOC_390_GOT12: | |
259 | return &elf_howto_table[(int) R_390_GOT12]; | |
260 | case BFD_RELOC_32_GOT_PCREL: | |
261 | return &elf_howto_table[(int) R_390_GOT32]; | |
262 | case BFD_RELOC_390_PLT32: | |
263 | return &elf_howto_table[(int) R_390_PLT32]; | |
264 | case BFD_RELOC_390_COPY: | |
265 | return &elf_howto_table[(int) R_390_COPY]; | |
266 | case BFD_RELOC_390_GLOB_DAT: | |
267 | return &elf_howto_table[(int) R_390_GLOB_DAT]; | |
268 | case BFD_RELOC_390_JMP_SLOT: | |
269 | return &elf_howto_table[(int) R_390_JMP_SLOT]; | |
270 | case BFD_RELOC_390_RELATIVE: | |
271 | return &elf_howto_table[(int) R_390_RELATIVE]; | |
272 | case BFD_RELOC_32_GOTOFF: | |
5236c819 | 273 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
0451c93c MS |
274 | case BFD_RELOC_390_GOTPC: |
275 | return &elf_howto_table[(int) R_390_GOTPC]; | |
276 | case BFD_RELOC_390_GOT16: | |
277 | return &elf_howto_table[(int) R_390_GOT16]; | |
278 | case BFD_RELOC_16_PCREL: | |
279 | return &elf_howto_table[(int) R_390_PC16]; | |
280 | case BFD_RELOC_390_PC16DBL: | |
281 | return &elf_howto_table[(int) R_390_PC16DBL]; | |
282 | case BFD_RELOC_390_PLT16DBL: | |
283 | return &elf_howto_table[(int) R_390_PLT16DBL]; | |
0451c93c MS |
284 | case BFD_RELOC_390_PC32DBL: |
285 | return &elf_howto_table[(int) R_390_PC32DBL]; | |
286 | case BFD_RELOC_390_PLT32DBL: | |
287 | return &elf_howto_table[(int) R_390_PLT32DBL]; | |
288 | case BFD_RELOC_390_GOTPCDBL: | |
289 | return &elf_howto_table[(int) R_390_GOTPCDBL]; | |
290 | case BFD_RELOC_64: | |
291 | return &elf_howto_table[(int) R_390_64]; | |
292 | case BFD_RELOC_64_PCREL: | |
293 | return &elf_howto_table[(int) R_390_PC64]; | |
294 | case BFD_RELOC_390_GOT64: | |
295 | return &elf_howto_table[(int) R_390_GOT64]; | |
296 | case BFD_RELOC_390_PLT64: | |
297 | return &elf_howto_table[(int) R_390_PLT64]; | |
298 | case BFD_RELOC_390_GOTENT: | |
299 | return &elf_howto_table[(int) R_390_GOTENT]; | |
5236c819 MS |
300 | case BFD_RELOC_16_GOTOFF: |
301 | return &elf_howto_table[(int) R_390_GOTOFF16]; | |
302 | case BFD_RELOC_390_GOTOFF64: | |
303 | return &elf_howto_table[(int) R_390_GOTOFF64]; | |
304 | case BFD_RELOC_390_GOTPLT12: | |
305 | return &elf_howto_table[(int) R_390_GOTPLT12]; | |
306 | case BFD_RELOC_390_GOTPLT16: | |
307 | return &elf_howto_table[(int) R_390_GOTPLT16]; | |
308 | case BFD_RELOC_390_GOTPLT32: | |
309 | return &elf_howto_table[(int) R_390_GOTPLT32]; | |
310 | case BFD_RELOC_390_GOTPLT64: | |
311 | return &elf_howto_table[(int) R_390_GOTPLT64]; | |
312 | case BFD_RELOC_390_GOTPLTENT: | |
313 | return &elf_howto_table[(int) R_390_GOTPLTENT]; | |
314 | case BFD_RELOC_390_PLTOFF16: | |
315 | return &elf_howto_table[(int) R_390_PLTOFF16]; | |
316 | case BFD_RELOC_390_PLTOFF32: | |
317 | return &elf_howto_table[(int) R_390_PLTOFF32]; | |
318 | case BFD_RELOC_390_PLTOFF64: | |
319 | return &elf_howto_table[(int) R_390_PLTOFF64]; | |
69fc87f1 MS |
320 | case BFD_RELOC_390_TLS_LOAD: |
321 | return &elf_howto_table[(int) R_390_TLS_LOAD]; | |
322 | case BFD_RELOC_390_TLS_GDCALL: | |
323 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; | |
324 | case BFD_RELOC_390_TLS_LDCALL: | |
325 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; | |
326 | case BFD_RELOC_390_TLS_GD64: | |
327 | return &elf_howto_table[(int) R_390_TLS_GD64]; | |
328 | case BFD_RELOC_390_TLS_GOTIE12: | |
329 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; | |
330 | case BFD_RELOC_390_TLS_GOTIE64: | |
331 | return &elf_howto_table[(int) R_390_TLS_GOTIE64]; | |
332 | case BFD_RELOC_390_TLS_LDM64: | |
333 | return &elf_howto_table[(int) R_390_TLS_LDM64]; | |
334 | case BFD_RELOC_390_TLS_IE64: | |
335 | return &elf_howto_table[(int) R_390_TLS_IE64]; | |
336 | case BFD_RELOC_390_TLS_IEENT: | |
337 | return &elf_howto_table[(int) R_390_TLS_IEENT]; | |
338 | case BFD_RELOC_390_TLS_LE64: | |
339 | return &elf_howto_table[(int) R_390_TLS_LE64]; | |
340 | case BFD_RELOC_390_TLS_LDO64: | |
341 | return &elf_howto_table[(int) R_390_TLS_LDO64]; | |
342 | case BFD_RELOC_390_TLS_DTPMOD: | |
343 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; | |
344 | case BFD_RELOC_390_TLS_DTPOFF: | |
345 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; | |
346 | case BFD_RELOC_390_TLS_TPOFF: | |
347 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; | |
bd1ea41b MS |
348 | case BFD_RELOC_390_20: |
349 | return &elf_howto_table[(int) R_390_20]; | |
350 | case BFD_RELOC_390_GOT20: | |
351 | return &elf_howto_table[(int) R_390_GOT20]; | |
352 | case BFD_RELOC_390_GOTPLT20: | |
353 | return &elf_howto_table[(int) R_390_GOTPLT20]; | |
354 | case BFD_RELOC_390_TLS_GOTIE20: | |
355 | return &elf_howto_table[(int) R_390_TLS_GOTIE20]; | |
5236c819 MS |
356 | case BFD_RELOC_VTABLE_INHERIT: |
357 | return &elf64_s390_vtinherit_howto; | |
358 | case BFD_RELOC_VTABLE_ENTRY: | |
359 | return &elf64_s390_vtentry_howto; | |
0451c93c MS |
360 | default: |
361 | break; | |
362 | } | |
a85d7ed0 NC |
363 | return 0; |
364 | } | |
365 | ||
366 | /* We need to use ELF64_R_TYPE so we have our own copy of this function, | |
367 | and elf64-s390.c has its own copy. */ | |
368 | ||
369 | static void | |
370 | elf_s390_info_to_howto (abfd, cache_ptr, dst) | |
371 | bfd *abfd ATTRIBUTE_UNUSED; | |
372 | arelent *cache_ptr; | |
373 | Elf_Internal_Rela *dst; | |
374 | { | |
375 | switch (ELF64_R_TYPE(dst->r_info)) | |
376 | { | |
377 | case R_390_GNU_VTINHERIT: | |
378 | cache_ptr->howto = &elf64_s390_vtinherit_howto; | |
379 | break; | |
380 | ||
381 | case R_390_GNU_VTENTRY: | |
382 | cache_ptr->howto = &elf64_s390_vtentry_howto; | |
383 | break; | |
384 | ||
385 | default: | |
386 | BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max); | |
387 | cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)]; | |
99c79b2e | 388 | } |
a85d7ed0 NC |
389 | } |
390 | ||
69fc87f1 MS |
391 | /* A relocation function which doesn't do anything. */ |
392 | static bfd_reloc_status_type | |
393 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 394 | output_bfd, error_message) |
69fc87f1 MS |
395 | bfd *abfd ATTRIBUTE_UNUSED; |
396 | arelent *reloc_entry; | |
397 | asymbol *symbol ATTRIBUTE_UNUSED; | |
398 | PTR data ATTRIBUTE_UNUSED; | |
399 | asection *input_section; | |
400 | bfd *output_bfd; | |
401 | char **error_message ATTRIBUTE_UNUSED; | |
402 | { | |
403 | if (output_bfd) | |
404 | reloc_entry->address += input_section->output_offset; | |
405 | return bfd_reloc_ok; | |
406 | } | |
407 | ||
bd1ea41b MS |
408 | /* Handle the large displacement relocs. */ |
409 | static bfd_reloc_status_type | |
410 | s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, | |
411 | output_bfd, error_message) | |
412 | bfd *abfd; | |
413 | arelent *reloc_entry; | |
414 | asymbol *symbol; | |
415 | PTR data; | |
416 | asection *input_section; | |
417 | bfd *output_bfd; | |
418 | char **error_message ATTRIBUTE_UNUSED; | |
419 | { | |
420 | reloc_howto_type *howto = reloc_entry->howto; | |
421 | bfd_vma relocation; | |
422 | bfd_vma insn; | |
423 | ||
424 | if (output_bfd != (bfd *) NULL | |
425 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
426 | && (! howto->partial_inplace | |
427 | || reloc_entry->addend == 0)) | |
428 | { | |
429 | reloc_entry->address += input_section->output_offset; | |
430 | return bfd_reloc_ok; | |
431 | } | |
432 | if (output_bfd != NULL) | |
433 | return bfd_reloc_continue; | |
434 | ||
435 | if (reloc_entry->address > input_section->_cooked_size) | |
436 | return bfd_reloc_outofrange; | |
437 | ||
438 | relocation = (symbol->value | |
439 | + symbol->section->output_section->vma | |
440 | + symbol->section->output_offset); | |
441 | relocation += reloc_entry->addend; | |
442 | if (howto->pc_relative) | |
443 | { | |
444 | relocation -= (input_section->output_section->vma | |
445 | + input_section->output_offset); | |
446 | relocation -= reloc_entry->address; | |
447 | } | |
448 | ||
449 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
450 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; | |
451 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
452 | ||
453 | if ((bfd_signed_vma) relocation < - 0x80000 | |
454 | || (bfd_signed_vma) relocation > 0x7ffff) | |
455 | return bfd_reloc_overflow; | |
456 | else | |
457 | return bfd_reloc_ok; | |
458 | } | |
459 | ||
b34976b6 | 460 | static bfd_boolean |
a85d7ed0 NC |
461 | elf_s390_is_local_label_name (abfd, name) |
462 | bfd *abfd; | |
463 | const char *name; | |
464 | { | |
465 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 466 | return TRUE; |
a85d7ed0 NC |
467 | |
468 | return _bfd_elf_is_local_label_name (abfd, name); | |
469 | } | |
470 | ||
471 | /* Functions for the 390 ELF linker. */ | |
472 | ||
473 | /* The name of the dynamic interpreter. This is put in the .interp | |
474 | section. */ | |
475 | ||
476 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
477 | ||
64285810 MS |
478 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
479 | copying dynamic variables from a shared lib into an app's dynbss | |
480 | section, and instead use a dynamic relocation to point into the | |
481 | shared lib. */ | |
482 | #define ELIMINATE_COPY_RELOCS 1 | |
483 | ||
a85d7ed0 NC |
484 | /* The size in bytes of the first entry in the procedure linkage table. */ |
485 | #define PLT_FIRST_ENTRY_SIZE 32 | |
486 | /* The size in bytes of an entry in the procedure linkage table. */ | |
99c79b2e | 487 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
488 | |
489 | #define GOT_ENTRY_SIZE 8 | |
490 | ||
491 | /* The first three entries in a procedure linkage table are reserved, | |
492 | and the initial contents are unimportant (we zero them out). | |
493 | Subsequent entries look like this. See the SVR4 ABI 386 | |
494 | supplement to see how this works. */ | |
495 | ||
496 | /* For the s390, simple addr offset can only be 0 - 4096. | |
497 | To use the full 16777216 TB address space, several instructions | |
498 | are needed to load an address in a register and execute | |
499 | a branch( or just saving the address) | |
500 | ||
99c79b2e | 501 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
502 | |
503 | /* The first 3 words in the GOT are then reserved. | |
504 | Word 0 is the address of the dynamic table. | |
505 | Word 1 is a pointer to a structure describing the object | |
506 | Word 2 is used to point to the loader entry address. | |
507 | ||
508 | The code for PLT entries looks like this: | |
509 | ||
510 | The GOT holds the address in the PLT to be executed. | |
511 | The loader then gets: | |
512 | 24(15) = Pointer to the structure describing the object. | |
99c79b2e | 513 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
514 | The loader must then find the module where the function is |
515 | and insert the address in the GOT. | |
516 | ||
517 | PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 | |
518 | LG 1,0(1) # 6 bytes Load address from GOT in r1 | |
519 | BCR 15,1 # 2 bytes Jump to address | |
520 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
521 | LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 | |
522 | BRCL 15,-x # 6 bytes Jump to start of PLT | |
523 | .long ? # 4 bytes offset into symbol table | |
524 | ||
525 | Total = 32 bytes per PLT entry | |
526 | Fixup at offset 2: relative address to GOT entry | |
527 | Fixup at offset 22: relative branch to PLT0 | |
528 | Fixup at offset 28: 32 bit offset into symbol table | |
529 | ||
530 | A 32 bit offset into the symbol table is enough. It allows for symbol | |
531 | tables up to a size of 2 gigabyte. A single dynamic object (the main | |
532 | program, any shared library) is limited to 4GB in size and I want to see | |
533 | the program that manages to have a symbol table of more than 2 GB with a | |
534 | total size of at max 4 GB. */ | |
535 | ||
dc810e39 AM |
536 | #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000 |
537 | #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310 | |
538 | #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004 | |
539 | #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10 | |
540 | #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c | |
541 | #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4 | |
542 | #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000 | |
543 | #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000 | |
a85d7ed0 NC |
544 | |
545 | /* The first PLT entry pushes the offset into the symbol table | |
546 | from R1 onto the stack at 8(15) and the loader object info | |
547 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
548 | ||
549 | /* The first entry in the PLT: | |
550 | ||
551 | PLT0: | |
552 | STG 1,56(15) # r1 contains the offset into the symbol table | |
553 | LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table | |
554 | MVC 48(8,15),8(1) # move loader ino (object struct address) to stack | |
555 | LG 1,16(1) # get entry address of loader | |
556 | BCR 15,1 # jump to loader | |
557 | ||
558 | Fixup at offset 8: relative address to start of GOT. */ | |
559 | ||
dc810e39 AM |
560 | #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038 |
561 | #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010 | |
562 | #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000 | |
563 | #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030 | |
564 | #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310 | |
565 | #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004 | |
566 | #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700 | |
567 | #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700 | |
a85d7ed0 NC |
568 | |
569 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
570 | decides to copy as dynamic relocs in check_relocs for each symbol. |
571 | This is so that it can later discard them if they are found to be | |
572 | unnecessary. We store the information in a field extending the | |
573 | regular ELF linker hash table. */ | |
a85d7ed0 | 574 | |
0451c93c | 575 | struct elf_s390_dyn_relocs |
a85d7ed0 | 576 | { |
0451c93c MS |
577 | struct elf_s390_dyn_relocs *next; |
578 | ||
579 | /* The input section of the reloc. */ | |
580 | asection *sec; | |
581 | ||
582 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 583 | bfd_size_type count; |
0451c93c MS |
584 | |
585 | /* Number of pc-relative relocs copied for the input section. */ | |
586 | bfd_size_type pc_count; | |
a85d7ed0 NC |
587 | }; |
588 | ||
589 | /* s390 ELF linker hash entry. */ | |
590 | ||
591 | struct elf_s390_link_hash_entry | |
592 | { | |
0451c93c | 593 | struct elf_link_hash_entry elf; |
a85d7ed0 | 594 | |
0451c93c MS |
595 | /* Track dynamic relocs copied for this symbol. */ |
596 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
597 | |
598 | /* Number of GOTPLT references for a function. */ | |
599 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
600 | |
601 | #define GOT_UNKNOWN 0 | |
602 | #define GOT_NORMAL 1 | |
603 | #define GOT_TLS_GD 2 | |
604 | #define GOT_TLS_IE 3 | |
605 | #define GOT_TLS_IE_NLT 3 | |
606 | unsigned char tls_type; | |
a85d7ed0 NC |
607 | }; |
608 | ||
69fc87f1 MS |
609 | #define elf_s390_hash_entry(ent) \ |
610 | ((struct elf_s390_link_hash_entry *)(ent)) | |
611 | ||
612 | struct elf_s390_obj_tdata | |
613 | { | |
614 | struct elf_obj_tdata root; | |
615 | ||
616 | /* tls_type for each local got entry. */ | |
617 | char *local_got_tls_type; | |
618 | }; | |
619 | ||
620 | #define elf_s390_tdata(abfd) \ | |
621 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
622 | ||
623 | #define elf_s390_local_got_tls_type(abfd) \ | |
624 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
625 | ||
626 | static bfd_boolean | |
627 | elf_s390_mkobject (abfd) | |
628 | bfd *abfd; | |
629 | { | |
630 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
631 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
632 | if (abfd->tdata.any == NULL) | |
633 | return FALSE; | |
634 | return TRUE; | |
635 | } | |
636 | ||
637 | static bfd_boolean | |
638 | elf_s390_object_p (abfd) | |
639 | bfd *abfd; | |
640 | { | |
641 | /* Allocate our special target data. */ | |
642 | struct elf_s390_obj_tdata *new_tdata; | |
643 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
644 | new_tdata = bfd_zalloc (abfd, amt); | |
645 | if (new_tdata == NULL) | |
646 | return FALSE; | |
647 | new_tdata->root = *abfd->tdata.elf_obj_data; | |
648 | abfd->tdata.any = new_tdata; | |
649 | /* Set the right machine number for an s390 elf32 file. */ | |
650 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); | |
651 | } | |
652 | ||
a85d7ed0 NC |
653 | /* s390 ELF linker hash table. */ |
654 | ||
655 | struct elf_s390_link_hash_table | |
656 | { | |
0451c93c | 657 | struct elf_link_hash_table elf; |
a85d7ed0 | 658 | |
0451c93c MS |
659 | /* Short-cuts to get to dynamic linker sections. */ |
660 | asection *sgot; | |
661 | asection *sgotplt; | |
662 | asection *srelgot; | |
663 | asection *splt; | |
664 | asection *srelplt; | |
665 | asection *sdynbss; | |
666 | asection *srelbss; | |
ec338859 | 667 | |
69fc87f1 MS |
668 | union { |
669 | bfd_signed_vma refcount; | |
670 | bfd_vma offset; | |
671 | } tls_ldm_got; | |
672 | ||
ec338859 AM |
673 | /* Small local sym to section mapping cache. */ |
674 | struct sym_sec_cache sym_sec; | |
0451c93c | 675 | }; |
a85d7ed0 NC |
676 | |
677 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
678 | ||
679 | #define elf_s390_hash_table(p) \ | |
680 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
681 | ||
682 | /* Create an entry in an s390 ELF linker hash table. */ | |
683 | ||
684 | static struct bfd_hash_entry * | |
0451c93c | 685 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
686 | struct bfd_hash_entry *entry; |
687 | struct bfd_hash_table *table; | |
688 | const char *string; | |
689 | { | |
a85d7ed0 NC |
690 | /* Allocate the structure if it has not already been allocated by a |
691 | subclass. */ | |
0451c93c MS |
692 | if (entry == NULL) |
693 | { | |
694 | entry = bfd_hash_allocate (table, | |
695 | sizeof (struct elf_s390_link_hash_entry)); | |
696 | if (entry == NULL) | |
697 | return entry; | |
698 | } | |
a85d7ed0 NC |
699 | |
700 | /* Call the allocation method of the superclass. */ | |
0451c93c MS |
701 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
702 | if (entry != NULL) | |
a85d7ed0 | 703 | { |
0451c93c MS |
704 | struct elf_s390_link_hash_entry *eh; |
705 | ||
706 | eh = (struct elf_s390_link_hash_entry *) entry; | |
707 | eh->dyn_relocs = NULL; | |
5236c819 | 708 | eh->gotplt_refcount = 0; |
69fc87f1 | 709 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
710 | } |
711 | ||
0451c93c | 712 | return entry; |
a85d7ed0 NC |
713 | } |
714 | ||
715 | /* Create an s390 ELF linker hash table. */ | |
716 | ||
717 | static struct bfd_link_hash_table * | |
718 | elf_s390_link_hash_table_create (abfd) | |
719 | bfd *abfd; | |
720 | { | |
721 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 722 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 723 | |
e2d34d7d | 724 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 725 | if (ret == NULL) |
a85d7ed0 NC |
726 | return NULL; |
727 | ||
0451c93c | 728 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
a85d7ed0 | 729 | { |
e2d34d7d | 730 | free (ret); |
a85d7ed0 NC |
731 | return NULL; |
732 | } | |
733 | ||
0451c93c MS |
734 | ret->sgot = NULL; |
735 | ret->sgotplt = NULL; | |
736 | ret->srelgot = NULL; | |
737 | ret->splt = NULL; | |
738 | ret->srelplt = NULL; | |
739 | ret->sdynbss = NULL; | |
740 | ret->srelbss = NULL; | |
69fc87f1 | 741 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 742 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
743 | |
744 | return &ret->elf.root; | |
745 | } | |
746 | ||
747 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
748 | shortcuts to them in our hash table. */ | |
749 | ||
b34976b6 | 750 | static bfd_boolean |
0451c93c MS |
751 | create_got_section (dynobj, info) |
752 | bfd *dynobj; | |
753 | struct bfd_link_info *info; | |
754 | { | |
755 | struct elf_s390_link_hash_table *htab; | |
756 | ||
757 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 758 | return FALSE; |
0451c93c MS |
759 | |
760 | htab = elf_s390_hash_table (info); | |
761 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
762 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
763 | if (!htab->sgot || !htab->sgotplt) | |
764 | abort (); | |
765 | ||
766 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
767 | if (htab->srelgot == NULL | |
768 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
769 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
770 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
771 | | SEC_READONLY)) | |
99881371 | 772 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
773 | return FALSE; |
774 | return TRUE; | |
0451c93c MS |
775 | } |
776 | ||
777 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
778 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
779 | hash table. */ | |
780 | ||
b34976b6 | 781 | static bfd_boolean |
0451c93c MS |
782 | elf_s390_create_dynamic_sections (dynobj, info) |
783 | bfd *dynobj; | |
784 | struct bfd_link_info *info; | |
785 | { | |
786 | struct elf_s390_link_hash_table *htab; | |
787 | ||
788 | htab = elf_s390_hash_table (info); | |
789 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 790 | return FALSE; |
0451c93c MS |
791 | |
792 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 793 | return FALSE; |
0451c93c MS |
794 | |
795 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
796 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
797 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
798 | if (!info->shared) | |
799 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
800 | ||
801 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
802 | || (!info->shared && !htab->srelbss)) | |
803 | abort (); | |
804 | ||
b34976b6 | 805 | return TRUE; |
a85d7ed0 NC |
806 | } |
807 | ||
0451c93c MS |
808 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
809 | ||
810 | static void | |
b48fa14c | 811 | elf_s390_copy_indirect_symbol (bed, dir, ind) |
9c5bfbb7 | 812 | const struct elf_backend_data *bed; |
0451c93c MS |
813 | struct elf_link_hash_entry *dir, *ind; |
814 | { | |
815 | struct elf_s390_link_hash_entry *edir, *eind; | |
816 | ||
817 | edir = (struct elf_s390_link_hash_entry *) dir; | |
818 | eind = (struct elf_s390_link_hash_entry *) ind; | |
819 | ||
820 | if (eind->dyn_relocs != NULL) | |
821 | { | |
822 | if (edir->dyn_relocs != NULL) | |
823 | { | |
824 | struct elf_s390_dyn_relocs **pp; | |
825 | struct elf_s390_dyn_relocs *p; | |
826 | ||
827 | if (ind->root.type == bfd_link_hash_indirect) | |
828 | abort (); | |
829 | ||
830 | /* Add reloc counts against the weak sym to the strong sym | |
831 | list. Merge any entries against the same section. */ | |
832 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
833 | { | |
834 | struct elf_s390_dyn_relocs *q; | |
835 | ||
836 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
837 | if (q->sec == p->sec) | |
838 | { | |
839 | q->pc_count += p->pc_count; | |
840 | q->count += p->count; | |
841 | *pp = p->next; | |
842 | break; | |
843 | } | |
844 | if (q == NULL) | |
845 | pp = &p->next; | |
846 | } | |
847 | *pp = edir->dyn_relocs; | |
848 | } | |
849 | ||
850 | edir->dyn_relocs = eind->dyn_relocs; | |
851 | eind->dyn_relocs = NULL; | |
852 | } | |
853 | ||
69fc87f1 MS |
854 | if (ind->root.type == bfd_link_hash_indirect |
855 | && dir->got.refcount <= 0) | |
856 | { | |
857 | edir->tls_type = eind->tls_type; | |
858 | eind->tls_type = GOT_UNKNOWN; | |
859 | } | |
860 | ||
64285810 MS |
861 | if (ELIMINATE_COPY_RELOCS |
862 | && ind->root.type != bfd_link_hash_indirect | |
863 | && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
864 | /* If called to transfer flags for a weakdef during processing | |
865 | of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. | |
866 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
867 | dir->elf_link_hash_flags |= | |
868 | (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC | |
869 | | ELF_LINK_HASH_REF_REGULAR | |
870 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK)); | |
871 | else | |
872 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
0451c93c | 873 | } |
a85d7ed0 | 874 | |
69fc87f1 MS |
875 | static int |
876 | elf_s390_tls_transition (info, r_type, is_local) | |
877 | struct bfd_link_info *info; | |
878 | int r_type; | |
879 | int is_local; | |
880 | { | |
881 | if (info->shared) | |
882 | return r_type; | |
883 | ||
884 | switch (r_type) | |
885 | { | |
886 | case R_390_TLS_GD64: | |
887 | case R_390_TLS_IE64: | |
888 | if (is_local) | |
889 | return R_390_TLS_LE64; | |
890 | return R_390_TLS_IE64; | |
891 | case R_390_TLS_GOTIE64: | |
892 | if (is_local) | |
893 | return R_390_TLS_LE64; | |
894 | return R_390_TLS_GOTIE64; | |
895 | case R_390_TLS_LDM64: | |
896 | return R_390_TLS_LE64; | |
897 | } | |
898 | ||
899 | return r_type; | |
900 | } | |
901 | ||
a85d7ed0 NC |
902 | /* Look through the relocs for a section during the first phase, and |
903 | allocate space in the global offset table or procedure linkage | |
904 | table. */ | |
905 | ||
b34976b6 | 906 | static bfd_boolean |
a85d7ed0 NC |
907 | elf_s390_check_relocs (abfd, info, sec, relocs) |
908 | bfd *abfd; | |
909 | struct bfd_link_info *info; | |
910 | asection *sec; | |
911 | const Elf_Internal_Rela *relocs; | |
912 | { | |
0451c93c | 913 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
914 | Elf_Internal_Shdr *symtab_hdr; |
915 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
916 | const Elf_Internal_Rela *rel; |
917 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 918 | asection *sreloc; |
5236c819 | 919 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 920 | int tls_type, old_tls_type; |
a85d7ed0 | 921 | |
1049f94e | 922 | if (info->relocatable) |
b34976b6 | 923 | return TRUE; |
a85d7ed0 | 924 | |
0451c93c | 925 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
926 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
927 | sym_hashes = elf_sym_hashes (abfd); | |
5236c819 | 928 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 929 | |
a85d7ed0 NC |
930 | sreloc = NULL; |
931 | ||
932 | rel_end = relocs + sec->reloc_count; | |
933 | for (rel = relocs; rel < rel_end; rel++) | |
934 | { | |
69fc87f1 | 935 | unsigned int r_type; |
a85d7ed0 NC |
936 | unsigned long r_symndx; |
937 | struct elf_link_hash_entry *h; | |
938 | ||
939 | r_symndx = ELF64_R_SYM (rel->r_info); | |
940 | ||
0451c93c MS |
941 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
942 | { | |
943 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
944 | bfd_archive_filename (abfd), | |
945 | r_symndx); | |
b34976b6 | 946 | return FALSE; |
0451c93c MS |
947 | } |
948 | ||
a85d7ed0 NC |
949 | if (r_symndx < symtab_hdr->sh_info) |
950 | h = NULL; | |
951 | else | |
99c79b2e | 952 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
a85d7ed0 | 953 | |
5236c819 MS |
954 | /* Create got section and local_got_refcounts array if they |
955 | are needed. */ | |
69fc87f1 MS |
956 | r_type = elf_s390_tls_transition (info, |
957 | ELF64_R_TYPE (rel->r_info), | |
958 | h == NULL); | |
959 | switch (r_type) | |
a85d7ed0 NC |
960 | { |
961 | case R_390_GOT12: | |
947216bf | 962 | case R_390_GOT16: |
bd1ea41b | 963 | case R_390_GOT20: |
a85d7ed0 NC |
964 | case R_390_GOT32: |
965 | case R_390_GOT64: | |
966 | case R_390_GOTENT: | |
5236c819 MS |
967 | case R_390_GOTPLT12: |
968 | case R_390_GOTPLT16: | |
bd1ea41b | 969 | case R_390_GOTPLT20: |
5236c819 MS |
970 | case R_390_GOTPLT32: |
971 | case R_390_GOTPLT64: | |
972 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
973 | case R_390_TLS_GD64: |
974 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 975 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
976 | case R_390_TLS_GOTIE64: |
977 | case R_390_TLS_IEENT: | |
978 | case R_390_TLS_IE64: | |
979 | case R_390_TLS_LDM64: | |
5236c819 MS |
980 | if (h == NULL |
981 | && local_got_refcounts == NULL) | |
a85d7ed0 | 982 | { |
5236c819 | 983 | bfd_size_type size; |
0451c93c | 984 | |
5236c819 | 985 | size = symtab_hdr->sh_info; |
69fc87f1 | 986 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
987 | local_got_refcounts = ((bfd_signed_vma *) |
988 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 989 | if (local_got_refcounts == NULL) |
5236c819 MS |
990 | return FALSE; |
991 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
992 | elf_s390_local_got_tls_type (abfd) |
993 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 994 | } |
5236c819 MS |
995 | /* Fall through. */ |
996 | case R_390_GOTOFF16: | |
997 | case R_390_GOTOFF32: | |
998 | case R_390_GOTOFF64: | |
0451c93c MS |
999 | case R_390_GOTPC: |
1000 | case R_390_GOTPCDBL: | |
1001 | if (htab->sgot == NULL) | |
1002 | { | |
1003 | if (htab->elf.dynobj == NULL) | |
1004 | htab->elf.dynobj = abfd; | |
1005 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1006 | return FALSE; |
0451c93c | 1007 | } |
5236c819 MS |
1008 | } |
1009 | ||
69fc87f1 | 1010 | switch (r_type) |
5236c819 | 1011 | { |
5236c819 MS |
1012 | case R_390_GOTOFF16: |
1013 | case R_390_GOTOFF32: | |
1014 | case R_390_GOTOFF64: | |
1015 | case R_390_GOTPC: | |
1016 | case R_390_GOTPCDBL: | |
1017 | /* Got is created, nothing to be done. */ | |
0451c93c | 1018 | break; |
ec338859 | 1019 | |
947216bf | 1020 | case R_390_PLT16DBL: |
a85d7ed0 NC |
1021 | case R_390_PLT32: |
1022 | case R_390_PLT32DBL: | |
1023 | case R_390_PLT64: | |
5236c819 MS |
1024 | case R_390_PLTOFF16: |
1025 | case R_390_PLTOFF32: | |
1026 | case R_390_PLTOFF64: | |
a85d7ed0 | 1027 | /* This symbol requires a procedure linkage table entry. We |
947216bf AM |
1028 | actually build the entry in adjust_dynamic_symbol, |
1029 | because this might be a case of linking PIC code which is | |
1030 | never referenced by a dynamic object, in which case we | |
1031 | don't need to generate a procedure linkage table entry | |
1032 | after all. */ | |
ec338859 | 1033 | |
a85d7ed0 | 1034 | /* If this is a local symbol, we resolve it directly without |
947216bf | 1035 | creating a procedure linkage table entry. */ |
5236c819 MS |
1036 | if (h != NULL) |
1037 | { | |
1038 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1039 | h->plt.refcount += 1; | |
1040 | } | |
1041 | break; | |
ec338859 | 1042 | |
5236c819 MS |
1043 | case R_390_GOTPLT12: |
1044 | case R_390_GOTPLT16: | |
bd1ea41b | 1045 | case R_390_GOTPLT20: |
5236c819 MS |
1046 | case R_390_GOTPLT32: |
1047 | case R_390_GOTPLT64: | |
1048 | case R_390_GOTPLTENT: | |
1049 | /* This symbol requires either a procedure linkage table entry | |
1050 | or an entry in the local got. We actually build the entry | |
1051 | in adjust_dynamic_symbol because whether this is really a | |
1052 | global reference can change and with it the fact if we have | |
1053 | to create a plt entry or a local got entry. To be able to | |
1054 | make a once global symbol a local one we have to keep track | |
1055 | of the number of gotplt references that exist for this | |
1056 | symbol. */ | |
1057 | if (h != NULL) | |
1058 | { | |
1059 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
1060 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1061 | h->plt.refcount += 1; | |
1062 | } | |
69fc87f1 MS |
1063 | else |
1064 | local_got_refcounts[r_symndx] += 1; | |
1065 | break; | |
1066 | ||
1067 | case R_390_TLS_LDM64: | |
1068 | htab->tls_ldm_got.refcount += 1; | |
1069 | break; | |
1070 | ||
1071 | case R_390_TLS_IE64: | |
1072 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1073 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1074 | case R_390_TLS_GOTIE64: |
1075 | case R_390_TLS_IEENT: | |
1076 | if (info->shared) | |
1077 | info->flags |= DF_STATIC_TLS; | |
1078 | /* Fall through */ | |
1079 | ||
1080 | case R_390_GOT12: | |
26e41594 | 1081 | case R_390_GOT16: |
bd1ea41b | 1082 | case R_390_GOT20: |
69fc87f1 MS |
1083 | case R_390_GOT32: |
1084 | case R_390_GOT64: | |
1085 | case R_390_GOTENT: | |
1086 | case R_390_TLS_GD64: | |
1087 | /* This symbol requires a global offset table entry. */ | |
1088 | switch (r_type) | |
1089 | { | |
1090 | default: | |
1091 | case R_390_GOT12: | |
1092 | case R_390_GOT16: | |
bd1ea41b | 1093 | case R_390_GOT20: |
69fc87f1 MS |
1094 | case R_390_GOT32: |
1095 | case R_390_GOTENT: | |
1096 | tls_type = GOT_NORMAL; | |
1097 | break; | |
1098 | case R_390_TLS_GD64: | |
1099 | tls_type = GOT_TLS_GD; | |
1100 | break; | |
1101 | case R_390_TLS_IE64: | |
1102 | case R_390_TLS_GOTIE64: | |
1103 | tls_type = GOT_TLS_IE; | |
1104 | break; | |
1105 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1106 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1107 | case R_390_TLS_IEENT: |
1108 | tls_type = GOT_TLS_IE_NLT; | |
1109 | break; | |
1110 | } | |
1111 | ||
1112 | if (h != NULL) | |
1113 | { | |
1114 | h->got.refcount += 1; | |
1115 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1116 | } | |
5236c819 MS |
1117 | else |
1118 | { | |
1119 | local_got_refcounts[r_symndx] += 1; | |
69fc87f1 | 1120 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; |
5236c819 | 1121 | } |
69fc87f1 MS |
1122 | /* If a TLS symbol is accessed using IE at least once, |
1123 | there is no point to use dynamic model for it. */ | |
1124 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1125 | { | |
1126 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1127 | { | |
1128 | (*_bfd_error_handler) | |
1129 | (_("%s: `%s' accessed both as normal and thread local symbol"), | |
1130 | bfd_archive_filename (abfd), h->root.root.string); | |
1131 | return FALSE; | |
1132 | } | |
1133 | if (old_tls_type > tls_type) | |
1134 | tls_type = old_tls_type; | |
1135 | } | |
1136 | ||
1137 | if (old_tls_type != tls_type) | |
1138 | { | |
1139 | if (h != NULL) | |
1140 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1141 | else | |
1142 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1143 | } | |
1144 | ||
1145 | if (r_type != R_390_TLS_IE64) | |
1146 | break; | |
1147 | /* Fall through */ | |
1148 | ||
1149 | case R_390_TLS_LE64: | |
1150 | if (!info->shared) | |
1151 | break; | |
1152 | info->flags |= DF_STATIC_TLS; | |
1153 | /* Fall through */ | |
ec338859 | 1154 | |
947216bf AM |
1155 | case R_390_8: |
1156 | case R_390_16: | |
a85d7ed0 NC |
1157 | case R_390_32: |
1158 | case R_390_64: | |
947216bf AM |
1159 | case R_390_PC16: |
1160 | case R_390_PC16DBL: | |
a85d7ed0 NC |
1161 | case R_390_PC32: |
1162 | case R_390_PC32DBL: | |
1163 | case R_390_PC64: | |
0451c93c MS |
1164 | if (h != NULL && !info->shared) |
1165 | { | |
1166 | /* If this reloc is in a read-only section, we might | |
1167 | need a copy reloc. We can't check reliably at this | |
1168 | stage whether the section is read-only, as input | |
1169 | sections have not yet been mapped to output sections. | |
1170 | Tentatively set the flag for now, and correct in | |
1171 | adjust_dynamic_symbol. */ | |
1172 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
ec338859 | 1173 | |
0451c93c MS |
1174 | /* We may need a .plt entry if the function this reloc |
1175 | refers to is in a shared lib. */ | |
1176 | h->plt.refcount += 1; | |
1177 | } | |
ec338859 | 1178 | |
a85d7ed0 | 1179 | /* If we are creating a shared library, and this is a reloc |
0451c93c MS |
1180 | against a global symbol, or a non PC relative reloc |
1181 | against a local symbol, then we need to copy the reloc | |
1182 | into the shared library. However, if we are linking with | |
1183 | -Bsymbolic, we do not need to copy a reloc against a | |
1184 | global symbol which is defined in an object we are | |
1185 | including in the link (i.e., DEF_REGULAR is set). At | |
1186 | this point we have not seen all the input files, so it is | |
1187 | possible that DEF_REGULAR is not set now but will be set | |
1188 | later (it is never cleared). In case of a weak definition, | |
1189 | DEF_REGULAR may be cleared later by a strong definition in | |
1190 | a shared library. We account for that possibility below by | |
1191 | storing information in the relocs_copied field of the hash | |
1192 | table entry. A similar situation occurs when creating | |
1193 | shared libraries and symbol visibility changes render the | |
1194 | symbol local. | |
1195 | ||
1196 | If on the other hand, we are creating an executable, we | |
1197 | may need to keep relocations for symbols satisfied by a | |
1198 | dynamic library if we manage to avoid copy relocs for the | |
1199 | symbol. */ | |
1200 | if ((info->shared | |
1201 | && (sec->flags & SEC_ALLOC) != 0 | |
1202 | && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 | |
1203 | && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL | |
1204 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32 | |
1205 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL | |
1206 | && ELF64_R_TYPE (rel->r_info) != R_390_PC64) | |
1207 | || (h != NULL | |
1208 | && (! info->symbolic | |
1209 | || h->root.type == bfd_link_hash_defweak | |
1210 | || (h->elf_link_hash_flags | |
1211 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
64285810 MS |
1212 | || (ELIMINATE_COPY_RELOCS |
1213 | && !info->shared | |
0451c93c MS |
1214 | && (sec->flags & SEC_ALLOC) != 0 |
1215 | && h != NULL | |
1216 | && (h->root.type == bfd_link_hash_defweak | |
1217 | || (h->elf_link_hash_flags | |
1218 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
a85d7ed0 | 1219 | { |
ec338859 AM |
1220 | struct elf_s390_dyn_relocs *p; |
1221 | struct elf_s390_dyn_relocs **head; | |
1222 | ||
0451c93c MS |
1223 | /* We must copy these reloc types into the output file. |
1224 | Create a reloc section in dynobj and make room for | |
1225 | this reloc. */ | |
a85d7ed0 NC |
1226 | if (sreloc == NULL) |
1227 | { | |
1228 | const char *name; | |
0451c93c | 1229 | bfd *dynobj; |
ec338859 | 1230 | |
a85d7ed0 NC |
1231 | name = (bfd_elf_string_from_elf_section |
1232 | (abfd, | |
1233 | elf_elfheader (abfd)->e_shstrndx, | |
1234 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1235 | if (name == NULL) | |
b34976b6 | 1236 | return FALSE; |
ec338859 | 1237 | |
0451c93c MS |
1238 | if (strncmp (name, ".rela", 5) != 0 |
1239 | || strcmp (bfd_get_section_name (abfd, sec), | |
1240 | name + 5) != 0) | |
1241 | { | |
1242 | (*_bfd_error_handler) | |
1243 | (_("%s: bad relocation section name `%s\'"), | |
1244 | bfd_archive_filename (abfd), name); | |
1245 | } | |
ec338859 | 1246 | |
0451c93c MS |
1247 | if (htab->elf.dynobj == NULL) |
1248 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1249 | |
0451c93c | 1250 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
1251 | sreloc = bfd_get_section_by_name (dynobj, name); |
1252 | if (sreloc == NULL) | |
1253 | { | |
1254 | flagword flags; | |
ec338859 | 1255 | |
a85d7ed0 NC |
1256 | sreloc = bfd_make_section (dynobj, name); |
1257 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1258 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1259 | if ((sec->flags & SEC_ALLOC) != 0) | |
1260 | flags |= SEC_ALLOC | SEC_LOAD; | |
1261 | if (sreloc == NULL | |
1262 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
99881371 | 1263 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 1264 | return FALSE; |
a85d7ed0 | 1265 | } |
0451c93c | 1266 | elf_section_data (sec)->sreloc = sreloc; |
a85d7ed0 | 1267 | } |
ec338859 | 1268 | |
0451c93c MS |
1269 | /* If this is a global symbol, we count the number of |
1270 | relocations we need for this symbol. */ | |
1271 | if (h != NULL) | |
a85d7ed0 | 1272 | { |
ec338859 | 1273 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1274 | } |
1275 | else | |
1276 | { | |
ec338859 AM |
1277 | /* Track dynamic relocs needed for local syms too. |
1278 | We really need local syms available to do this | |
1279 | easily. Oh well. */ | |
1280 | ||
1281 | asection *s; | |
1282 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1283 | sec, r_symndx); | |
1284 | if (s == NULL) | |
b34976b6 | 1285 | return FALSE; |
ec338859 AM |
1286 | |
1287 | head = ((struct elf_s390_dyn_relocs **) | |
1288 | &elf_section_data (s)->local_dynrel); | |
1289 | } | |
1290 | ||
1291 | p = *head; | |
1292 | if (p == NULL || p->sec != sec) | |
1293 | { | |
1294 | bfd_size_type amt = sizeof *p; | |
1295 | p = ((struct elf_s390_dyn_relocs *) | |
1296 | bfd_alloc (htab->elf.dynobj, amt)); | |
1297 | if (p == NULL) | |
b34976b6 | 1298 | return FALSE; |
ec338859 AM |
1299 | p->next = *head; |
1300 | *head = p; | |
1301 | p->sec = sec; | |
1302 | p->count = 0; | |
1303 | p->pc_count = 0; | |
a85d7ed0 | 1304 | } |
ec338859 AM |
1305 | |
1306 | p->count += 1; | |
1307 | if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 | |
1308 | || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL | |
1309 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32 | |
1310 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL | |
1311 | || ELF64_R_TYPE (rel->r_info) == R_390_PC64) | |
1312 | p->pc_count += 1; | |
a85d7ed0 | 1313 | } |
a85d7ed0 | 1314 | break; |
ec338859 | 1315 | |
a85d7ed0 NC |
1316 | /* This relocation describes the C++ object vtable hierarchy. |
1317 | Reconstruct it for later use during GC. */ | |
947216bf AM |
1318 | case R_390_GNU_VTINHERIT: |
1319 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 1320 | return FALSE; |
947216bf | 1321 | break; |
ec338859 | 1322 | |
a85d7ed0 NC |
1323 | /* This relocation describes which C++ vtable entries are actually |
1324 | used. Record for later use during GC. */ | |
947216bf AM |
1325 | case R_390_GNU_VTENTRY: |
1326 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 1327 | return FALSE; |
947216bf | 1328 | break; |
ec338859 | 1329 | |
a85d7ed0 NC |
1330 | default: |
1331 | break; | |
1332 | } | |
1333 | } | |
1334 | ||
b34976b6 | 1335 | return TRUE; |
a85d7ed0 NC |
1336 | } |
1337 | ||
1338 | /* Return the section that should be marked against GC for a given | |
1339 | relocation. */ | |
1340 | ||
1341 | static asection * | |
1e2f5b6e AM |
1342 | elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
1343 | asection *sec; | |
a85d7ed0 NC |
1344 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1345 | Elf_Internal_Rela *rel; | |
1346 | struct elf_link_hash_entry *h; | |
1347 | Elf_Internal_Sym *sym; | |
1348 | { | |
1349 | if (h != NULL) | |
1350 | { | |
1351 | switch (ELF64_R_TYPE (rel->r_info)) | |
1352 | { | |
1353 | case R_390_GNU_VTINHERIT: | |
1354 | case R_390_GNU_VTENTRY: | |
1355 | break; | |
1356 | ||
1357 | default: | |
1358 | switch (h->root.type) | |
1359 | { | |
1360 | case bfd_link_hash_defined: | |
1361 | case bfd_link_hash_defweak: | |
1362 | return h->root.u.def.section; | |
1363 | ||
1364 | case bfd_link_hash_common: | |
1365 | return h->root.u.c.p->section; | |
1366 | ||
1367 | default: | |
1368 | break; | |
1369 | } | |
1370 | } | |
1371 | } | |
1372 | else | |
1e2f5b6e | 1373 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
a85d7ed0 NC |
1374 | |
1375 | return NULL; | |
1376 | } | |
1377 | ||
1378 | /* Update the got entry reference counts for the section being removed. */ | |
1379 | ||
b34976b6 | 1380 | static bfd_boolean |
a85d7ed0 | 1381 | elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
0451c93c MS |
1382 | bfd *abfd; |
1383 | struct bfd_link_info *info; | |
1384 | asection *sec; | |
1385 | const Elf_Internal_Rela *relocs; | |
a85d7ed0 NC |
1386 | { |
1387 | Elf_Internal_Shdr *symtab_hdr; | |
1388 | struct elf_link_hash_entry **sym_hashes; | |
1389 | bfd_signed_vma *local_got_refcounts; | |
1390 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1391 | |
ec338859 | 1392 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1393 | |
0451c93c MS |
1394 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1395 | sym_hashes = elf_sym_hashes (abfd); | |
1396 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1397 | |
1398 | relend = relocs + sec->reloc_count; | |
1399 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1400 | { |
26e41594 AM |
1401 | unsigned long r_symndx; |
1402 | unsigned int r_type; | |
1403 | struct elf_link_hash_entry *h = NULL; | |
1404 | ||
5236c819 | 1405 | r_symndx = ELF64_R_SYM (rel->r_info); |
26e41594 AM |
1406 | if (r_symndx >= symtab_hdr->sh_info) |
1407 | { | |
1408 | struct elf_s390_link_hash_entry *eh; | |
1409 | struct elf_s390_dyn_relocs **pp; | |
1410 | struct elf_s390_dyn_relocs *p; | |
5236c819 | 1411 | |
26e41594 AM |
1412 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1413 | eh = (struct elf_s390_link_hash_entry *) h; | |
5236c819 | 1414 | |
26e41594 AM |
1415 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1416 | if (p->sec == sec) | |
1417 | { | |
1418 | /* Everything must go for SEC. */ | |
1419 | *pp = p->next; | |
1420 | break; | |
1421 | } | |
1422 | } | |
1423 | ||
1424 | r_type = ELF64_R_TYPE (rel->r_info); | |
1425 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1426 | switch (r_type) |
5236c819 | 1427 | { |
69fc87f1 MS |
1428 | case R_390_TLS_LDM64: |
1429 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1430 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1431 | break; | |
1432 | ||
1433 | case R_390_TLS_GD64: | |
1434 | case R_390_TLS_IE64: | |
1435 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1436 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1437 | case R_390_TLS_GOTIE64: |
1438 | case R_390_TLS_IEENT: | |
5236c819 MS |
1439 | case R_390_GOT12: |
1440 | case R_390_GOT16: | |
bd1ea41b | 1441 | case R_390_GOT20: |
5236c819 MS |
1442 | case R_390_GOT32: |
1443 | case R_390_GOT64: | |
1444 | case R_390_GOTOFF16: | |
1445 | case R_390_GOTOFF32: | |
1446 | case R_390_GOTOFF64: | |
1447 | case R_390_GOTPC: | |
1448 | case R_390_GOTPCDBL: | |
1449 | case R_390_GOTENT: | |
1450 | if (h != NULL) | |
1451 | { | |
1452 | if (h->got.refcount > 0) | |
1453 | h->got.refcount -= 1; | |
1454 | } | |
1455 | else if (local_got_refcounts != NULL) | |
1456 | { | |
1457 | if (local_got_refcounts[r_symndx] > 0) | |
1458 | local_got_refcounts[r_symndx] -= 1; | |
1459 | } | |
26e41594 | 1460 | break; |
a85d7ed0 | 1461 | |
5236c819 MS |
1462 | case R_390_8: |
1463 | case R_390_12: | |
1464 | case R_390_16: | |
bd1ea41b | 1465 | case R_390_20: |
5236c819 MS |
1466 | case R_390_32: |
1467 | case R_390_64: | |
1468 | case R_390_PC16: | |
1469 | case R_390_PC16DBL: | |
1470 | case R_390_PC32: | |
1471 | case R_390_PC32DBL: | |
1472 | case R_390_PC64: | |
26e41594 AM |
1473 | if (info->shared) |
1474 | break; | |
1475 | /* Fall through */ | |
a85d7ed0 | 1476 | |
69fc87f1 MS |
1477 | case R_390_PLT16DBL: |
1478 | case R_390_PLT32: | |
1479 | case R_390_PLT32DBL: | |
1480 | case R_390_PLT64: | |
1481 | case R_390_PLTOFF16: | |
1482 | case R_390_PLTOFF32: | |
1483 | case R_390_PLTOFF64: | |
1484 | if (h != NULL) | |
1485 | { | |
1486 | if (h->plt.refcount > 0) | |
1487 | h->plt.refcount -= 1; | |
1488 | } | |
1489 | break; | |
1490 | ||
1491 | case R_390_GOTPLT12: | |
1492 | case R_390_GOTPLT16: | |
bd1ea41b | 1493 | case R_390_GOTPLT20: |
69fc87f1 MS |
1494 | case R_390_GOTPLT32: |
1495 | case R_390_GOTPLT64: | |
1496 | case R_390_GOTPLTENT: | |
1497 | if (h != NULL) | |
1498 | { | |
1499 | if (h->plt.refcount > 0) | |
1500 | { | |
1501 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1502 | h->plt.refcount -= 1; | |
1503 | } | |
1504 | } | |
1505 | else if (local_got_refcounts != NULL) | |
1506 | { | |
1507 | if (local_got_refcounts[r_symndx] > 0) | |
1508 | local_got_refcounts[r_symndx] -= 1; | |
1509 | } | |
1510 | break; | |
1511 | ||
5236c819 MS |
1512 | default: |
1513 | break; | |
1514 | } | |
1515 | } | |
a85d7ed0 | 1516 | |
b34976b6 | 1517 | return TRUE; |
a85d7ed0 NC |
1518 | } |
1519 | ||
5236c819 MS |
1520 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1521 | entry but we found we will not create any. Called when we find we will | |
1522 | not have any PLT for this symbol, by for example | |
1523 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1524 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1525 | created (we're only linking static objects). */ | |
1526 | ||
1527 | static void | |
1528 | elf_s390_adjust_gotplt (h) | |
1529 | struct elf_s390_link_hash_entry *h; | |
1530 | { | |
1531 | if (h->elf.root.type == bfd_link_hash_warning) | |
1532 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1533 | ||
1534 | if (h->gotplt_refcount <= 0) | |
1535 | return; | |
1536 | ||
1537 | /* We simply add the number of gotplt references to the number | |
1538 | * of got references for this symbol. */ | |
1539 | h->elf.got.refcount += h->gotplt_refcount; | |
1540 | h->gotplt_refcount = -1; | |
1541 | } | |
1542 | ||
a85d7ed0 NC |
1543 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1544 | regular object. The current definition is in some section of the | |
1545 | dynamic object, but we're not including those sections. We have to | |
1546 | change the definition to something the rest of the link can | |
1547 | understand. */ | |
1548 | ||
b34976b6 | 1549 | static bfd_boolean |
a85d7ed0 NC |
1550 | elf_s390_adjust_dynamic_symbol (info, h) |
1551 | struct bfd_link_info *info; | |
1552 | struct elf_link_hash_entry *h; | |
1553 | { | |
0451c93c | 1554 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1555 | asection *s; |
1556 | unsigned int power_of_two; | |
1557 | ||
a85d7ed0 NC |
1558 | /* If this is a function, put it in the procedure linkage table. We |
1559 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1560 | (although we could actually do it here). */ |
a85d7ed0 NC |
1561 | if (h->type == STT_FUNC |
1562 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1563 | { | |
0451c93c MS |
1564 | if (h->plt.refcount <= 0 |
1565 | || (! info->shared | |
1566 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
f9cd9119 MS |
1567 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
1568 | && h->root.type != bfd_link_hash_undefweak | |
1569 | && h->root.type != bfd_link_hash_undefined)) | |
a85d7ed0 NC |
1570 | { |
1571 | /* This case can occur if we saw a PLT32 reloc in an input | |
947216bf AM |
1572 | file, but the symbol was never referred to by a dynamic |
1573 | object, or if all references were garbage collected. In | |
0451c93c MS |
1574 | such a case, we don't actually need to build a procedure |
1575 | linkage table, and we can just do a PC32 reloc instead. */ | |
a85d7ed0 NC |
1576 | h->plt.offset = (bfd_vma) -1; |
1577 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1578 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1579 | } |
1580 | ||
b34976b6 | 1581 | return TRUE; |
a85d7ed0 | 1582 | } |
bbd7ec4a | 1583 | else |
0451c93c MS |
1584 | /* It's possible that we incorrectly decided a .plt reloc was |
1585 | needed for an R_390_PC32 reloc to a non-function sym in | |
1586 | check_relocs. We can't decide accurately between function and | |
1587 | non-function syms in check-relocs; Objects loaded later in | |
1588 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1589 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1590 | |
1591 | /* If this is a weak symbol, and there is a real definition, the | |
1592 | processor independent code will have arranged for us to see the | |
1593 | real definition first, and we can just use the same value. */ | |
1594 | if (h->weakdef != NULL) | |
1595 | { | |
1596 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1597 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1598 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1599 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
64285810 MS |
1600 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
1601 | h->elf_link_hash_flags | |
1602 | = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) | |
1603 | | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); | |
b34976b6 | 1604 | return TRUE; |
a85d7ed0 NC |
1605 | } |
1606 | ||
1607 | /* This is a reference to a symbol defined by a dynamic object which | |
1608 | is not a function. */ | |
1609 | ||
1610 | /* If we are creating a shared library, we must presume that the | |
1611 | only references to the symbol are via the global offset table. | |
1612 | For such cases we need not do anything here; the relocations will | |
1613 | be handled correctly by relocate_section. */ | |
1614 | if (info->shared) | |
b34976b6 | 1615 | return TRUE; |
a85d7ed0 NC |
1616 | |
1617 | /* If there are no references to this symbol that do not use the | |
1618 | GOT, we don't need to generate a copy reloc. */ | |
1619 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
b34976b6 | 1620 | return TRUE; |
a85d7ed0 | 1621 | |
0451c93c MS |
1622 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1623 | if (info->nocopyreloc) | |
1624 | { | |
1625 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1626 | return TRUE; |
0451c93c MS |
1627 | } |
1628 | ||
64285810 | 1629 | if (ELIMINATE_COPY_RELOCS) |
0451c93c | 1630 | { |
64285810 MS |
1631 | struct elf_s390_link_hash_entry * eh; |
1632 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1633 | |
64285810 MS |
1634 | eh = (struct elf_s390_link_hash_entry *) h; |
1635 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1636 | { | |
1637 | s = p->sec->output_section; | |
1638 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1639 | break; | |
1640 | } | |
1641 | ||
1642 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1643 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1644 | if (p == NULL) | |
1645 | { | |
1646 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1647 | return TRUE; | |
1648 | } | |
0451c93c MS |
1649 | } |
1650 | ||
a85d7ed0 NC |
1651 | /* We must allocate the symbol in our .dynbss section, which will |
1652 | become part of the .bss section of the executable. There will be | |
1653 | an entry for this symbol in the .dynsym section. The dynamic | |
1654 | object will contain position independent code, so all references | |
1655 | from the dynamic object to this symbol will go through the global | |
1656 | offset table. The dynamic linker will use the .dynsym entry to | |
1657 | determine the address it must put in the global offset table, so | |
1658 | both the dynamic object and the regular object will refer to the | |
1659 | same memory location for the variable. */ | |
1660 | ||
0451c93c | 1661 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1662 | |
0451c93c MS |
1663 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1664 | copy the initial value out of the dynamic object and into the | |
1665 | runtime process image. */ | |
a85d7ed0 NC |
1666 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1667 | { | |
0451c93c | 1668 | htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
a85d7ed0 NC |
1669 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1670 | } | |
1671 | ||
1672 | /* We need to figure out the alignment required for this symbol. I | |
1673 | have no idea how ELF linkers handle this. */ | |
1674 | power_of_two = bfd_log2 (h->size); | |
1675 | if (power_of_two > 3) | |
1676 | power_of_two = 3; | |
1677 | ||
1678 | /* Apply the required alignment. */ | |
0451c93c MS |
1679 | s = htab->sdynbss; |
1680 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
1681 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
a85d7ed0 | 1682 | { |
0451c93c | 1683 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1684 | return FALSE; |
a85d7ed0 NC |
1685 | } |
1686 | ||
1687 | /* Define the symbol as being at this point in the section. */ | |
1688 | h->root.u.def.section = s; | |
1689 | h->root.u.def.value = s->_raw_size; | |
1690 | ||
1691 | /* Increment the section size to make room for the symbol. */ | |
1692 | s->_raw_size += h->size; | |
1693 | ||
b34976b6 | 1694 | return TRUE; |
a85d7ed0 NC |
1695 | } |
1696 | ||
0451c93c MS |
1697 | /* This is the condition under which elf_s390_finish_dynamic_symbol |
1698 | will be called from elflink.h. If elflink.h doesn't call our | |
1699 | finish_dynamic_symbol routine, we'll need to do something about | |
1700 | initializing any .plt and .got entries in elf_s390_relocate_section. */ | |
4ec72bde | 1701 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ |
0451c93c | 1702 | ((DYN) \ |
4ec72bde | 1703 | && ((SHARED) \ |
0451c93c MS |
1704 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
1705 | && ((H)->dynindx != -1 \ | |
1706 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1707 | ||
1708 | /* Allocate space in .plt, .got and associated reloc sections for | |
1709 | dynamic relocs. */ | |
1710 | ||
b34976b6 | 1711 | static bfd_boolean |
0451c93c MS |
1712 | allocate_dynrelocs (h, inf) |
1713 | struct elf_link_hash_entry *h; | |
1714 | PTR inf; | |
1715 | { | |
1716 | struct bfd_link_info *info; | |
1717 | struct elf_s390_link_hash_table *htab; | |
1718 | struct elf_s390_link_hash_entry *eh; | |
1719 | struct elf_s390_dyn_relocs *p; | |
1720 | ||
e92d460e | 1721 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1722 | return TRUE; |
0451c93c | 1723 | |
e92d460e | 1724 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1725 | /* When warning symbols are created, they **replace** the "real" |
1726 | entry in the hash table, thus we never get to see the real | |
1727 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1728 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1729 | ||
0451c93c MS |
1730 | info = (struct bfd_link_info *) inf; |
1731 | htab = elf_s390_hash_table (info); | |
1732 | ||
1733 | if (htab->elf.dynamic_sections_created | |
82058a73 MS |
1734 | && h->plt.refcount > 0 |
1735 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1736 | || h->root.type != bfd_link_hash_undefweak)) | |
0451c93c MS |
1737 | { |
1738 | /* Make sure this symbol is output as a dynamic symbol. | |
1739 | Undefined weak syms won't yet be marked as dynamic. */ | |
1740 | if (h->dynindx == -1 | |
1741 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1742 | { | |
1743 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1744 | return FALSE; |
0451c93c MS |
1745 | } |
1746 | ||
82058a73 | 1747 | if (info->shared |
4ec72bde | 1748 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
0451c93c MS |
1749 | { |
1750 | asection *s = htab->splt; | |
1751 | ||
1752 | /* If this is the first .plt entry, make room for the special | |
1753 | first entry. */ | |
1754 | if (s->_raw_size == 0) | |
1755 | s->_raw_size += PLT_FIRST_ENTRY_SIZE; | |
1756 | ||
1757 | h->plt.offset = s->_raw_size; | |
1758 | ||
1759 | /* If this symbol is not defined in a regular file, and we are | |
1760 | not generating a shared library, then set the symbol to this | |
1761 | location in the .plt. This is required to make function | |
1762 | pointers compare as equal between the normal executable and | |
1763 | the shared library. */ | |
1764 | if (! info->shared | |
1765 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1766 | { | |
1767 | h->root.u.def.section = s; | |
1768 | h->root.u.def.value = h->plt.offset; | |
1769 | } | |
ec338859 | 1770 | |
0451c93c MS |
1771 | /* Make room for this entry. */ |
1772 | s->_raw_size += PLT_ENTRY_SIZE; | |
ec338859 | 1773 | |
0451c93c MS |
1774 | /* We also need to make an entry in the .got.plt section, which |
1775 | will be placed in the .got section by the linker script. */ | |
1776 | htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; | |
1777 | ||
1778 | /* We also need to make an entry in the .rela.plt section. */ | |
1779 | htab->srelplt->_raw_size += sizeof (Elf64_External_Rela); | |
1780 | } | |
1781 | else | |
1782 | { | |
1783 | h->plt.offset = (bfd_vma) -1; | |
1784 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1785 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1786 | } |
1787 | } | |
1788 | else | |
1789 | { | |
1790 | h->plt.offset = (bfd_vma) -1; | |
1791 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1792 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1793 | } |
1794 | ||
69fc87f1 MS |
1795 | /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to |
1796 | the binary, we can optimize a bit. IE64 and GOTIE64 get converted | |
1797 | to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT | |
1798 | we can save the dynamic TLS relocation. */ | |
1799 | if (h->got.refcount > 0 | |
1800 | && !info->shared | |
1801 | && h->dynindx == -1 | |
1802 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
1803 | { | |
1804 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) | |
1805 | /* For the GOTIE access without a literal pool entry the offset has | |
1806 | to be stored somewhere. The immediate value in the instruction | |
1807 | is not bit enough so the value is stored in the got. */ | |
1808 | { | |
1809 | h->got.offset = htab->sgot->_raw_size; | |
1810 | htab->sgot->_raw_size += GOT_ENTRY_SIZE; | |
1811 | } | |
1812 | else | |
1813 | h->got.offset = (bfd_vma) -1; | |
1814 | } | |
1815 | else if (h->got.refcount > 0) | |
0451c93c MS |
1816 | { |
1817 | asection *s; | |
b34976b6 | 1818 | bfd_boolean dyn; |
69fc87f1 | 1819 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1820 | |
1821 | /* Make sure this symbol is output as a dynamic symbol. | |
1822 | Undefined weak syms won't yet be marked as dynamic. */ | |
1823 | if (h->dynindx == -1 | |
1824 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1825 | { | |
1826 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1827 | return FALSE; |
0451c93c MS |
1828 | } |
1829 | ||
1830 | s = htab->sgot; | |
1831 | h->got.offset = s->_raw_size; | |
1832 | s->_raw_size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1833 | /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ |
1834 | if (tls_type == GOT_TLS_GD) | |
1835 | s->_raw_size += GOT_ENTRY_SIZE; | |
0451c93c | 1836 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1837 | /* R_390_TLS_IE64 needs one dynamic relocation, |
1838 | R_390_TLS_GD64 needs one if local symbol and two if global. */ | |
1839 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1840 | || tls_type >= GOT_TLS_IE) | |
1841 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1842 | else if (tls_type == GOT_TLS_GD) | |
1843 | htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela); | |
82058a73 MS |
1844 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1845 | || h->root.type != bfd_link_hash_undefweak) | |
1846 | && (info->shared | |
1847 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
0451c93c MS |
1848 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
1849 | } | |
1850 | else | |
1851 | h->got.offset = (bfd_vma) -1; | |
1852 | ||
1853 | eh = (struct elf_s390_link_hash_entry *) h; | |
1854 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1855 | return TRUE; |
0451c93c MS |
1856 | |
1857 | /* In the shared -Bsymbolic case, discard space allocated for | |
1858 | dynamic pc-relative relocs against symbols which turn out to be | |
1859 | defined in regular objects. For the normal shared case, discard | |
1860 | space for pc-relative relocs that have become local due to symbol | |
1861 | visibility changes. */ | |
1862 | ||
1863 | if (info->shared) | |
1864 | { | |
1865 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1866 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1867 | || info->symbolic)) | |
1868 | { | |
1869 | struct elf_s390_dyn_relocs **pp; | |
1870 | ||
1871 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1872 | { | |
1873 | p->count -= p->pc_count; | |
1874 | p->pc_count = 0; | |
1875 | if (p->count == 0) | |
1876 | *pp = p->next; | |
1877 | else | |
1878 | pp = &p->next; | |
1879 | } | |
1880 | } | |
82058a73 MS |
1881 | |
1882 | /* Also discard relocs on undefined weak syms with non-default | |
1883 | visibility. */ | |
1884 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1885 | && h->root.type == bfd_link_hash_undefweak) | |
1886 | eh->dyn_relocs = NULL; | |
0451c93c | 1887 | } |
64285810 | 1888 | else if (ELIMINATE_COPY_RELOCS) |
0451c93c MS |
1889 | { |
1890 | /* For the non-shared case, discard space for relocs against | |
1891 | symbols which turn out to need copy relocs or are not | |
1892 | dynamic. */ | |
1893 | ||
1894 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1895 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1896 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1897 | || (htab->elf.dynamic_sections_created | |
1898 | && (h->root.type == bfd_link_hash_undefweak | |
1899 | || h->root.type == bfd_link_hash_undefined)))) | |
1900 | { | |
1901 | /* Make sure this symbol is output as a dynamic symbol. | |
1902 | Undefined weak syms won't yet be marked as dynamic. */ | |
1903 | if (h->dynindx == -1 | |
1904 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1905 | { | |
1906 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1907 | return FALSE; |
0451c93c MS |
1908 | } |
1909 | ||
1910 | /* If that succeeded, we know we'll be keeping all the | |
1911 | relocs. */ | |
1912 | if (h->dynindx != -1) | |
1913 | goto keep; | |
1914 | } | |
1915 | ||
1916 | eh->dyn_relocs = NULL; | |
1917 | ||
ec338859 | 1918 | keep: ; |
0451c93c MS |
1919 | } |
1920 | ||
1921 | /* Finally, allocate space. */ | |
1922 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1923 | { | |
1924 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
1925 | sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
1926 | } | |
1927 | ||
b34976b6 | 1928 | return TRUE; |
0451c93c MS |
1929 | } |
1930 | ||
1931 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1932 | ||
b34976b6 | 1933 | static bfd_boolean |
0451c93c MS |
1934 | readonly_dynrelocs (h, inf) |
1935 | struct elf_link_hash_entry *h; | |
1936 | PTR inf; | |
1937 | { | |
1938 | struct elf_s390_link_hash_entry *eh; | |
1939 | struct elf_s390_dyn_relocs *p; | |
1940 | ||
e92d460e AM |
1941 | if (h->root.type == bfd_link_hash_warning) |
1942 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1943 | ||
0451c93c MS |
1944 | eh = (struct elf_s390_link_hash_entry *) h; |
1945 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1946 | { | |
1947 | asection *s = p->sec->output_section; | |
1948 | ||
1949 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1950 | { | |
1951 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1952 | ||
1953 | info->flags |= DF_TEXTREL; | |
1954 | ||
1955 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1956 | return FALSE; |
0451c93c MS |
1957 | } |
1958 | } | |
b34976b6 | 1959 | return TRUE; |
0451c93c MS |
1960 | } |
1961 | ||
a85d7ed0 NC |
1962 | /* Set the sizes of the dynamic sections. */ |
1963 | ||
b34976b6 | 1964 | static bfd_boolean |
a85d7ed0 | 1965 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1966 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1967 | struct bfd_link_info *info; |
1968 | { | |
0451c93c | 1969 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1970 | bfd *dynobj; |
1971 | asection *s; | |
b34976b6 | 1972 | bfd_boolean relocs; |
0451c93c | 1973 | bfd *ibfd; |
a85d7ed0 | 1974 | |
0451c93c MS |
1975 | htab = elf_s390_hash_table (info); |
1976 | dynobj = htab->elf.dynobj; | |
1977 | if (dynobj == NULL) | |
1978 | abort (); | |
a85d7ed0 | 1979 | |
0451c93c | 1980 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1981 | { |
1982 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1983 | if (info->executable) |
a85d7ed0 NC |
1984 | { |
1985 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1986 | if (s == NULL) |
1987 | abort (); | |
a85d7ed0 NC |
1988 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
1989 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1990 | } | |
1991 | } | |
a85d7ed0 | 1992 | |
0451c93c MS |
1993 | /* Set up .got offsets for local syms, and space for local dynamic |
1994 | relocs. */ | |
1995 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 1996 | { |
0451c93c MS |
1997 | bfd_signed_vma *local_got; |
1998 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 1999 | char *local_tls_type; |
0451c93c MS |
2000 | bfd_size_type locsymcount; |
2001 | Elf_Internal_Shdr *symtab_hdr; | |
2002 | asection *srela; | |
a85d7ed0 | 2003 | |
0451c93c | 2004 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
a85d7ed0 NC |
2005 | continue; |
2006 | ||
0451c93c | 2007 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 2008 | { |
ec338859 | 2009 | struct elf_s390_dyn_relocs *p; |
0451c93c | 2010 | |
ec338859 AM |
2011 | for (p = *((struct elf_s390_dyn_relocs **) |
2012 | &elf_section_data (s)->local_dynrel); | |
2013 | p != NULL; | |
2014 | p = p->next) | |
a85d7ed0 | 2015 | { |
ec338859 AM |
2016 | if (!bfd_is_abs_section (p->sec) |
2017 | && bfd_is_abs_section (p->sec->output_section)) | |
2018 | { | |
2019 | /* Input section has been discarded, either because | |
2020 | it is a copy of a linkonce section or due to | |
2021 | linker script /DISCARD/, so we'll be discarding | |
2022 | the relocs too. */ | |
2023 | } | |
248866a8 | 2024 | else if (p->count != 0) |
ec338859 AM |
2025 | { |
2026 | srela = elf_section_data (p->sec)->sreloc; | |
2027 | srela->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
248866a8 AM |
2028 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2029 | info->flags |= DF_TEXTREL; | |
ec338859 | 2030 | } |
a85d7ed0 NC |
2031 | } |
2032 | } | |
0451c93c MS |
2033 | |
2034 | local_got = elf_local_got_refcounts (ibfd); | |
2035 | if (!local_got) | |
2036 | continue; | |
2037 | ||
2038 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2039 | locsymcount = symtab_hdr->sh_info; | |
2040 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 2041 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
2042 | s = htab->sgot; |
2043 | srela = htab->srelgot; | |
69fc87f1 | 2044 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 2045 | { |
0451c93c | 2046 | if (*local_got > 0) |
a85d7ed0 | 2047 | { |
0451c93c MS |
2048 | *local_got = s->_raw_size; |
2049 | s->_raw_size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
2050 | if (*local_tls_type == GOT_TLS_GD) |
2051 | s->_raw_size += GOT_ENTRY_SIZE; | |
0451c93c MS |
2052 | if (info->shared) |
2053 | srela->_raw_size += sizeof (Elf64_External_Rela); | |
a85d7ed0 NC |
2054 | } |
2055 | else | |
0451c93c | 2056 | *local_got = (bfd_vma) -1; |
a85d7ed0 | 2057 | } |
0451c93c MS |
2058 | } |
2059 | ||
69fc87f1 MS |
2060 | if (htab->tls_ldm_got.refcount > 0) |
2061 | { | |
2062 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 | |
2063 | relocs. */ | |
2064 | htab->tls_ldm_got.offset = htab->sgot->_raw_size; | |
2065 | htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; | |
2066 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
2067 | } | |
2068 | else | |
2069 | htab->tls_ldm_got.offset = -1; | |
2070 | ||
0451c93c MS |
2071 | /* Allocate global sym .plt and .got entries, and space for global |
2072 | sym dynamic relocs. */ | |
2073 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2074 | ||
2075 | /* We now have determined the sizes of the various dynamic sections. | |
2076 | Allocate memory for them. */ | |
b34976b6 | 2077 | relocs = FALSE; |
0451c93c MS |
2078 | for (s = dynobj->sections; s != NULL; s = s->next) |
2079 | { | |
2080 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2081 | continue; | |
2082 | ||
2083 | if (s == htab->splt | |
2084 | || s == htab->sgot | |
2085 | || s == htab->sgotplt) | |
2086 | { | |
2087 | /* Strip this section if we don't need it; see the | |
2088 | comment below. */ | |
2089 | } | |
2090 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
2091 | { | |
2092 | if (s->_raw_size != 0 && s != htab->srelplt) | |
b34976b6 | 2093 | relocs = TRUE; |
ec338859 | 2094 | |
0451c93c MS |
2095 | /* We use the reloc_count field as a counter if we need |
2096 | to copy relocs into the output file. */ | |
2097 | s->reloc_count = 0; | |
2098 | } | |
2099 | else | |
a85d7ed0 NC |
2100 | { |
2101 | /* It's not one of our sections, so don't allocate space. */ | |
2102 | continue; | |
2103 | } | |
2104 | ||
0451c93c | 2105 | if (s->_raw_size == 0) |
a85d7ed0 | 2106 | { |
0451c93c MS |
2107 | /* If we don't need this section, strip it from the |
2108 | output file. This is to handle .rela.bss and | |
2109 | .rela.plt. We must create it in | |
2110 | create_dynamic_sections, because it must be created | |
2111 | before the linker maps input sections to output | |
2112 | sections. The linker does that before | |
2113 | adjust_dynamic_symbol is called, and it is that | |
2114 | function which decides whether anything needs to go | |
2115 | into these sections. */ | |
2116 | ||
a85d7ed0 NC |
2117 | _bfd_strip_section_from_output (info, s); |
2118 | continue; | |
2119 | } | |
2120 | ||
0451c93c MS |
2121 | /* Allocate memory for the section contents. We use bfd_zalloc |
2122 | here in case unused entries are not reclaimed before the | |
2123 | section's contents are written out. This should not happen, | |
2124 | but this way if it does, we get a R_390_NONE reloc instead | |
2125 | of garbage. */ | |
2126 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
2127 | if (s->contents == NULL) | |
b34976b6 | 2128 | return FALSE; |
a85d7ed0 NC |
2129 | } |
2130 | ||
0451c93c | 2131 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2132 | { |
2133 | /* Add some entries to the .dynamic section. We fill in the | |
2134 | values later, in elf_s390_finish_dynamic_sections, but we | |
2135 | must add the entries now so that we get the correct size for | |
2136 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2137 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
2138 | #define add_dynamic_entry(TAG, VAL) \ |
2139 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
2140 | ||
36af4a4e | 2141 | if (info->executable) |
a85d7ed0 | 2142 | { |
dc810e39 | 2143 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2144 | return FALSE; |
a85d7ed0 NC |
2145 | } |
2146 | ||
0451c93c | 2147 | if (htab->splt->_raw_size != 0) |
a85d7ed0 | 2148 | { |
dc810e39 AM |
2149 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2150 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2151 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2152 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2153 | return FALSE; |
a85d7ed0 NC |
2154 | } |
2155 | ||
2156 | if (relocs) | |
947216bf AM |
2157 | { |
2158 | if (!add_dynamic_entry (DT_RELA, 0) | |
2159 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2160 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2161 | return FALSE; |
ec338859 | 2162 | |
0451c93c MS |
2163 | /* If any dynamic relocs apply to a read-only section, |
2164 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2165 | if ((info->flags & DF_TEXTREL) == 0) |
2166 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2167 | (PTR) info); | |
ec338859 | 2168 | |
0451c93c MS |
2169 | if ((info->flags & DF_TEXTREL) != 0) |
2170 | { | |
2171 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2172 | return FALSE; |
0451c93c | 2173 | } |
a85d7ed0 NC |
2174 | } |
2175 | } | |
dc810e39 | 2176 | #undef add_dynamic_entry |
a85d7ed0 | 2177 | |
b34976b6 | 2178 | return TRUE; |
a85d7ed0 NC |
2179 | } |
2180 | ||
69fc87f1 MS |
2181 | /* Return the base VMA address which should be subtracted from real addresses |
2182 | when resolving @dtpoff relocation. | |
2183 | This is PT_TLS segment p_vaddr. */ | |
2184 | ||
2185 | static bfd_vma | |
2186 | dtpoff_base (info) | |
2187 | struct bfd_link_info *info; | |
2188 | { | |
2189 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
2190 | if (elf_hash_table (info)->tls_segment == NULL) | |
2191 | return 0; | |
2192 | return elf_hash_table (info)->tls_segment->start; | |
2193 | } | |
2194 | ||
2195 | /* Return the relocation value for @tpoff relocation | |
2196 | if STT_TLS virtual address is ADDRESS. */ | |
2197 | ||
2198 | static bfd_vma | |
2199 | tpoff (info, address) | |
2200 | struct bfd_link_info *info; | |
2201 | bfd_vma address; | |
2202 | { | |
2203 | struct elf_link_tls_segment *tls_segment | |
2204 | = elf_hash_table (info)->tls_segment; | |
2205 | ||
2206 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
2207 | if (tls_segment == NULL) | |
2208 | return 0; | |
2209 | return (align_power (tls_segment->size, tls_segment->align) | |
2210 | + tls_segment->start - address); | |
2211 | } | |
2212 | ||
2213 | /* Complain if TLS instruction relocation is against an invalid | |
2214 | instruction. */ | |
2215 | ||
2216 | static void | |
2217 | invalid_tls_insn (input_bfd, input_section, rel) | |
2218 | bfd *input_bfd; | |
2219 | asection *input_section; | |
2220 | Elf_Internal_Rela *rel; | |
2221 | { | |
2222 | reloc_howto_type *howto; | |
2223 | ||
2224 | howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); | |
2225 | (*_bfd_error_handler) | |
2226 | (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), | |
2227 | bfd_archive_filename (input_bfd), | |
2228 | bfd_get_section_name (input_bfd, input_section), | |
2229 | (long) rel->r_offset, | |
2230 | howto->name); | |
2231 | } | |
2232 | ||
a85d7ed0 NC |
2233 | /* Relocate a 390 ELF section. */ |
2234 | ||
b34976b6 | 2235 | static bfd_boolean |
a85d7ed0 NC |
2236 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2237 | contents, relocs, local_syms, local_sections) | |
2238 | bfd *output_bfd; | |
2239 | struct bfd_link_info *info; | |
2240 | bfd *input_bfd; | |
2241 | asection *input_section; | |
2242 | bfd_byte *contents; | |
2243 | Elf_Internal_Rela *relocs; | |
2244 | Elf_Internal_Sym *local_syms; | |
2245 | asection **local_sections; | |
2246 | { | |
0451c93c | 2247 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2248 | Elf_Internal_Shdr *symtab_hdr; |
2249 | struct elf_link_hash_entry **sym_hashes; | |
2250 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2251 | Elf_Internal_Rela *rel; |
2252 | Elf_Internal_Rela *relend; | |
2253 | ||
1049f94e | 2254 | if (info->relocatable) |
b34976b6 | 2255 | return TRUE; |
b491616a | 2256 | |
0451c93c | 2257 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2258 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2259 | sym_hashes = elf_sym_hashes (input_bfd); | |
2260 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2261 | ||
a85d7ed0 NC |
2262 | rel = relocs; |
2263 | relend = relocs + input_section->reloc_count; | |
2264 | for (; rel < relend; rel++) | |
2265 | { | |
5236c819 | 2266 | unsigned int r_type; |
a85d7ed0 NC |
2267 | reloc_howto_type *howto; |
2268 | unsigned long r_symndx; | |
2269 | struct elf_link_hash_entry *h; | |
2270 | Elf_Internal_Sym *sym; | |
2271 | asection *sec; | |
0451c93c | 2272 | bfd_vma off; |
a85d7ed0 | 2273 | bfd_vma relocation; |
b34976b6 | 2274 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2275 | bfd_reloc_status_type r; |
69fc87f1 | 2276 | int tls_type; |
a85d7ed0 NC |
2277 | |
2278 | r_type = ELF64_R_TYPE (rel->r_info); | |
0451c93c | 2279 | if (r_type == (int) R_390_GNU_VTINHERIT |
947216bf AM |
2280 | || r_type == (int) R_390_GNU_VTENTRY) |
2281 | continue; | |
5236c819 | 2282 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2283 | { |
2284 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2285 | return FALSE; |
a85d7ed0 | 2286 | } |
a85d7ed0 | 2287 | |
b491616a | 2288 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2289 | r_symndx = ELF64_R_SYM (rel->r_info); |
5236c819 MS |
2290 | |
2291 | /* This is a final link. */ | |
a85d7ed0 NC |
2292 | h = NULL; |
2293 | sym = NULL; | |
2294 | sec = NULL; | |
b34976b6 | 2295 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2296 | if (r_symndx < symtab_hdr->sh_info) |
2297 | { | |
2298 | sym = local_syms + r_symndx; | |
2299 | sec = local_sections[r_symndx]; | |
f8df10f4 | 2300 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
a85d7ed0 NC |
2301 | } |
2302 | else | |
2303 | { | |
560e09e9 | 2304 | bfd_boolean warned ATTRIBUTE_UNUSED; |
0451c93c | 2305 | |
560e09e9 NC |
2306 | RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, |
2307 | symtab_hdr, relocation, sec, | |
2308 | unresolved_reloc, info, | |
2309 | warned); | |
a85d7ed0 NC |
2310 | } |
2311 | ||
2312 | switch (r_type) | |
2313 | { | |
5236c819 MS |
2314 | case R_390_GOTPLT12: |
2315 | case R_390_GOTPLT16: | |
bd1ea41b | 2316 | case R_390_GOTPLT20: |
5236c819 MS |
2317 | case R_390_GOTPLT32: |
2318 | case R_390_GOTPLT64: | |
2319 | case R_390_GOTPLTENT: | |
2320 | /* There are three cases for a GOTPLT relocation. 1) The | |
2321 | relocation is against the jump slot entry of a plt that | |
2322 | will get emitted to the output file. 2) The relocation | |
2323 | is against the jump slot of a plt entry that has been | |
2324 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2325 | as replacement. 3) The relocation is against a local symbol. | |
2326 | Cases 2) and 3) are the same as the GOT relocation code | |
2327 | so we just have to test for case 1 and fall through for | |
2328 | the other two. */ | |
2329 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2330 | { | |
2331 | bfd_vma plt_index; | |
2332 | ||
2333 | /* Calc. index no. | |
2334 | Current offset - size first entry / entry size. */ | |
2335 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2336 | PLT_ENTRY_SIZE; | |
26e41594 | 2337 | |
5236c819 MS |
2338 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2339 | addr & GOT addr. */ | |
2340 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2341 | unresolved_reloc = FALSE; | |
2342 | ||
2343 | if (r_type == R_390_GOTPLTENT) | |
26e41594 | 2344 | relocation += htab->sgot->output_section->vma; |
5236c819 MS |
2345 | break; |
2346 | } | |
2347 | /* Fall through. */ | |
2348 | ||
947216bf AM |
2349 | case R_390_GOT12: |
2350 | case R_390_GOT16: | |
bd1ea41b | 2351 | case R_390_GOT20: |
947216bf AM |
2352 | case R_390_GOT32: |
2353 | case R_390_GOT64: | |
2354 | case R_390_GOTENT: | |
2355 | /* Relocation is to the entry for this symbol in the global | |
2356 | offset table. */ | |
0451c93c MS |
2357 | if (htab->sgot == NULL) |
2358 | abort (); | |
a85d7ed0 | 2359 | |
947216bf AM |
2360 | if (h != NULL) |
2361 | { | |
b34976b6 | 2362 | bfd_boolean dyn; |
a85d7ed0 | 2363 | |
947216bf | 2364 | off = h->got.offset; |
0451c93c | 2365 | dyn = htab->elf.dynamic_sections_created; |
4ec72bde | 2366 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
947216bf AM |
2367 | || (info->shared |
2368 | && (info->symbolic | |
0451c93c MS |
2369 | || h->dynindx == -1 |
2370 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
82058a73 MS |
2371 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
2372 | || (ELF_ST_VISIBILITY (h->other) | |
2373 | && h->root.type == bfd_link_hash_undefweak)) | |
947216bf AM |
2374 | { |
2375 | /* This is actually a static link, or it is a | |
2376 | -Bsymbolic link and the symbol is defined | |
2377 | locally, or the symbol was forced to be local | |
2378 | because of a version file. We must initialize | |
2379 | this entry in the global offset table. Since the | |
2380 | offset must always be a multiple of 2, we use the | |
2381 | least significant bit to record whether we have | |
2382 | initialized it already. | |
2383 | ||
2384 | When doing a dynamic link, we create a .rel.got | |
2385 | relocation entry to initialize the value. This | |
2386 | is done in the finish_dynamic_symbol routine. */ | |
2387 | if ((off & 1) != 0) | |
2388 | off &= ~1; | |
2389 | else | |
2390 | { | |
a85d7ed0 | 2391 | bfd_put_64 (output_bfd, relocation, |
0451c93c | 2392 | htab->sgot->contents + off); |
947216bf AM |
2393 | h->got.offset |= 1; |
2394 | } | |
2395 | } | |
0451c93c | 2396 | else |
b34976b6 | 2397 | unresolved_reloc = FALSE; |
947216bf AM |
2398 | } |
2399 | else | |
2400 | { | |
0451c93c MS |
2401 | if (local_got_offsets == NULL) |
2402 | abort (); | |
a85d7ed0 | 2403 | |
947216bf | 2404 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2405 | |
947216bf AM |
2406 | /* The offset must always be a multiple of 8. We use |
2407 | the least significant bit to record whether we have | |
2408 | already generated the necessary reloc. */ | |
2409 | if ((off & 1) != 0) | |
2410 | off &= ~1; | |
2411 | else | |
2412 | { | |
2413 | bfd_put_64 (output_bfd, relocation, | |
0451c93c | 2414 | htab->sgot->contents + off); |
a85d7ed0 | 2415 | |
947216bf AM |
2416 | if (info->shared) |
2417 | { | |
2418 | asection *s; | |
2419 | Elf_Internal_Rela outrel; | |
2420 | bfd_byte *loc; | |
a85d7ed0 | 2421 | |
947216bf AM |
2422 | s = htab->srelgot; |
2423 | if (s == NULL) | |
0451c93c | 2424 | abort (); |
a85d7ed0 | 2425 | |
947216bf AM |
2426 | outrel.r_offset = (htab->sgot->output_section->vma |
2427 | + htab->sgot->output_offset | |
2428 | + off); | |
2429 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2430 | outrel.r_addend = relocation; |
947216bf AM |
2431 | loc = s->contents; |
2432 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
2433 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2434 | } | |
a85d7ed0 | 2435 | |
947216bf AM |
2436 | local_got_offsets[r_symndx] |= 1; |
2437 | } | |
2438 | } | |
a85d7ed0 | 2439 | |
0451c93c MS |
2440 | if (off >= (bfd_vma) -2) |
2441 | abort (); | |
2442 | ||
2443 | relocation = htab->sgot->output_offset + off; | |
2444 | ||
ae9a127f NC |
2445 | /* For @GOTENT the relocation is against the offset between |
2446 | the instruction and the symbols entry in the GOT and not | |
2447 | between the start of the GOT and the symbols entry. We | |
2448 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2449 | if ( r_type == R_390_GOTENT |
2450 | || r_type == R_390_GOTPLTENT) | |
0451c93c | 2451 | relocation += htab->sgot->output_section->vma; |
a85d7ed0 | 2452 | |
947216bf | 2453 | break; |
99c79b2e | 2454 | |
5236c819 MS |
2455 | case R_390_GOTOFF16: |
2456 | case R_390_GOTOFF32: | |
2457 | case R_390_GOTOFF64: | |
947216bf AM |
2458 | /* Relocation is relative to the start of the global offset |
2459 | table. */ | |
a85d7ed0 | 2460 | |
947216bf AM |
2461 | /* Note that sgot->output_offset is not involved in this |
2462 | calculation. We always want the start of .got. If we | |
2463 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2464 | permitted by the ABI, we might have to change this | |
2465 | calculation. */ | |
2466 | relocation -= htab->sgot->output_section->vma; | |
947216bf | 2467 | break; |
a85d7ed0 | 2468 | |
947216bf | 2469 | case R_390_GOTPC: |
a85d7ed0 | 2470 | case R_390_GOTPCDBL: |
947216bf AM |
2471 | /* Use global offset table as symbol value. */ |
2472 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2473 | unresolved_reloc = FALSE; |
947216bf | 2474 | break; |
a85d7ed0 | 2475 | |
947216bf AM |
2476 | case R_390_PLT16DBL: |
2477 | case R_390_PLT32: | |
2478 | case R_390_PLT32DBL: | |
2479 | case R_390_PLT64: | |
2480 | /* Relocation is to the entry for this symbol in the | |
2481 | procedure linkage table. */ | |
a85d7ed0 | 2482 | |
947216bf AM |
2483 | /* Resolve a PLT32 reloc against a local symbol directly, |
2484 | without using the procedure linkage table. */ | |
2485 | if (h == NULL) | |
2486 | break; | |
a85d7ed0 | 2487 | |
947216bf | 2488 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2489 | || htab->splt == NULL) |
947216bf AM |
2490 | { |
2491 | /* We didn't make a PLT entry for this symbol. This | |
2492 | happens when statically linking PIC code, or when | |
2493 | using -Bsymbolic. */ | |
2494 | break; | |
2495 | } | |
2496 | ||
2497 | relocation = (htab->splt->output_section->vma | |
2498 | + htab->splt->output_offset | |
2499 | + h->plt.offset); | |
b34976b6 | 2500 | unresolved_reloc = FALSE; |
26e41594 | 2501 | break; |
5236c819 MS |
2502 | |
2503 | case R_390_PLTOFF16: | |
2504 | case R_390_PLTOFF32: | |
2505 | case R_390_PLTOFF64: | |
26e41594 AM |
2506 | /* Relocation is to the entry for this symbol in the |
2507 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2508 | |
2509 | /* For local symbols or if we didn't make a PLT entry for | |
2510 | this symbol resolve the symbol directly. */ | |
26e41594 | 2511 | if ( h == NULL |
5236c819 MS |
2512 | || h->plt.offset == (bfd_vma) -1 |
2513 | || htab->splt == NULL) | |
2514 | { | |
2515 | relocation -= htab->sgot->output_section->vma; | |
2516 | break; | |
2517 | } | |
2518 | ||
26e41594 AM |
2519 | relocation = (htab->splt->output_section->vma |
2520 | + htab->splt->output_offset | |
2521 | + h->plt.offset | |
5236c819 MS |
2522 | - htab->sgot->output_section->vma); |
2523 | unresolved_reloc = FALSE; | |
947216bf AM |
2524 | break; |
2525 | ||
2526 | case R_390_8: | |
2527 | case R_390_16: | |
2528 | case R_390_32: | |
2529 | case R_390_64: | |
2530 | case R_390_PC16: | |
2531 | case R_390_PC16DBL: | |
2532 | case R_390_PC32: | |
a85d7ed0 | 2533 | case R_390_PC32DBL: |
947216bf | 2534 | case R_390_PC64: |
ec338859 AM |
2535 | /* r_symndx will be zero only for relocs against symbols |
2536 | from removed linkonce sections, or sections discarded by | |
2537 | a linker script. */ | |
947216bf AM |
2538 | if (r_symndx == 0 |
2539 | || (input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
2540 | break; |
2541 | ||
947216bf | 2542 | if ((info->shared |
82058a73 MS |
2543 | && (h == NULL |
2544 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2545 | || h->root.type != bfd_link_hash_undefweak) | |
0451c93c MS |
2546 | && ((r_type != R_390_PC16 |
2547 | && r_type != R_390_PC16DBL | |
2548 | && r_type != R_390_PC32 | |
2549 | && r_type != R_390_PC32DBL | |
2550 | && r_type != R_390_PC64) | |
2551 | || (h != NULL | |
2552 | && h->dynindx != -1 | |
2553 | && (! info->symbolic | |
2554 | || (h->elf_link_hash_flags | |
2555 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
64285810 MS |
2556 | || (ELIMINATE_COPY_RELOCS |
2557 | && !info->shared | |
0451c93c MS |
2558 | && h != NULL |
2559 | && h->dynindx != -1 | |
2560 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
2561 | && (((h->elf_link_hash_flags | |
2562 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2563 | && (h->elf_link_hash_flags | |
2564 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2565 | || h->root.type == bfd_link_hash_undefweak | |
2566 | || h->root.type == bfd_link_hash_undefined))) | |
947216bf AM |
2567 | { |
2568 | Elf_Internal_Rela outrel; | |
b34976b6 | 2569 | bfd_boolean skip, relocate; |
0451c93c | 2570 | asection *sreloc; |
947216bf | 2571 | bfd_byte *loc; |
a85d7ed0 | 2572 | |
947216bf AM |
2573 | /* When generating a shared object, these relocations |
2574 | are copied into the output file to be resolved at run | |
2575 | time. */ | |
b34976b6 AM |
2576 | skip = FALSE; |
2577 | relocate = FALSE; | |
a85d7ed0 | 2578 | |
c629eae0 JJ |
2579 | outrel.r_offset = |
2580 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2581 | rel->r_offset); | |
2582 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2583 | skip = TRUE; |
0bb2d96a | 2584 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2585 | skip = TRUE, relocate = TRUE; |
a85d7ed0 | 2586 | |
947216bf AM |
2587 | outrel.r_offset += (input_section->output_section->vma |
2588 | + input_section->output_offset); | |
a85d7ed0 | 2589 | |
947216bf | 2590 | if (skip) |
0bb2d96a | 2591 | memset (&outrel, 0, sizeof outrel); |
947216bf | 2592 | else if (h != NULL |
0451c93c MS |
2593 | && h->dynindx != -1 |
2594 | && (r_type == R_390_PC16 | |
2595 | || r_type == R_390_PC16DBL | |
2596 | || r_type == R_390_PC32 | |
2597 | || r_type == R_390_PC32DBL | |
2598 | || r_type == R_390_PC64 | |
2599 | || !info->shared | |
2600 | || !info->symbolic | |
2601 | || (h->elf_link_hash_flags | |
2602 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
947216bf AM |
2603 | { |
2604 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
27018c3f | 2605 | outrel.r_addend = rel->r_addend; |
947216bf AM |
2606 | } |
2607 | else | |
2608 | { | |
0451c93c | 2609 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 2610 | relocate = TRUE; |
0451c93c MS |
2611 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
2612 | outrel.r_addend = relocation + rel->r_addend; | |
2613 | } | |
a85d7ed0 | 2614 | |
0451c93c MS |
2615 | sreloc = elf_section_data (input_section)->sreloc; |
2616 | if (sreloc == NULL) | |
2617 | abort (); | |
2618 | ||
947216bf AM |
2619 | loc = sreloc->contents; |
2620 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2621 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
a85d7ed0 | 2622 | |
947216bf AM |
2623 | /* If this reloc is against an external symbol, we do |
2624 | not want to fiddle with the addend. Otherwise, we | |
2625 | need to include the symbol value so that it becomes | |
2626 | an addend for the dynamic reloc. */ | |
2627 | if (! relocate) | |
2628 | continue; | |
2629 | } | |
a85d7ed0 | 2630 | |
947216bf | 2631 | break; |
a85d7ed0 | 2632 | |
69fc87f1 MS |
2633 | /* Relocations for tls literal pool entries. */ |
2634 | case R_390_TLS_IE64: | |
2635 | if (info->shared) | |
2636 | { | |
2637 | Elf_Internal_Rela outrel; | |
2638 | asection *sreloc; | |
2639 | bfd_byte *loc; | |
2640 | ||
2641 | outrel.r_offset = rel->r_offset | |
2642 | + input_section->output_section->vma | |
2643 | + input_section->output_offset; | |
2644 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
2645 | sreloc = elf_section_data (input_section)->sreloc; | |
2646 | if (sreloc == NULL) | |
2647 | abort (); | |
2648 | loc = sreloc->contents; | |
2649 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2650 | bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); | |
2651 | } | |
ae9a127f | 2652 | /* Fall through. */ |
69fc87f1 MS |
2653 | |
2654 | case R_390_TLS_GD64: | |
2655 | case R_390_TLS_GOTIE64: | |
2656 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2657 | tls_type = GOT_UNKNOWN; | |
2658 | if (h == NULL && local_got_offsets) | |
2659 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2660 | else if (h != NULL) | |
2661 | { | |
2662 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2663 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2664 | r_type = R_390_TLS_LE64; | |
2665 | } | |
2666 | if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) | |
2667 | r_type = R_390_TLS_IE64; | |
2668 | ||
2669 | if (r_type == R_390_TLS_LE64) | |
2670 | { | |
2671 | /* This relocation gets optimized away by the local exec | |
2672 | access optimization. */ | |
2673 | BFD_ASSERT (! unresolved_reloc); | |
2674 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2675 | contents + rel->r_offset); | |
2676 | continue; | |
2677 | } | |
2678 | ||
2679 | if (htab->sgot == NULL) | |
2680 | abort (); | |
2681 | ||
2682 | if (h != NULL) | |
2683 | off = h->got.offset; | |
2684 | else | |
2685 | { | |
2686 | if (local_got_offsets == NULL) | |
2687 | abort (); | |
2688 | ||
2689 | off = local_got_offsets[r_symndx]; | |
2690 | } | |
2691 | ||
2692 | emit_tls_relocs: | |
2693 | ||
2694 | if ((off & 1) != 0) | |
2695 | off &= ~1; | |
26e41594 | 2696 | else |
69fc87f1 MS |
2697 | { |
2698 | Elf_Internal_Rela outrel; | |
2699 | bfd_byte *loc; | |
2700 | int dr_type, indx; | |
2701 | ||
2702 | if (htab->srelgot == NULL) | |
2703 | abort (); | |
2704 | ||
2705 | outrel.r_offset = (htab->sgot->output_section->vma | |
2706 | + htab->sgot->output_offset + off); | |
2707 | ||
2708 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2709 | if (r_type == R_390_TLS_GD64) | |
2710 | dr_type = R_390_TLS_DTPMOD; | |
2711 | else | |
2712 | dr_type = R_390_TLS_TPOFF; | |
2713 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2714 | outrel.r_addend = relocation - dtpoff_base (info); | |
2715 | else | |
2716 | outrel.r_addend = 0; | |
2717 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2718 | loc = htab->srelgot->contents; | |
2719 | loc += htab->srelgot->reloc_count++ | |
2720 | * sizeof (Elf64_External_Rela); | |
2721 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2722 | ||
2723 | if (r_type == R_390_TLS_GD64) | |
2724 | { | |
2725 | if (indx == 0) | |
2726 | { | |
2727 | BFD_ASSERT (! unresolved_reloc); | |
2728 | bfd_put_64 (output_bfd, | |
2729 | relocation - dtpoff_base (info), | |
2730 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2731 | } | |
2732 | else | |
2733 | { | |
2734 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); | |
2735 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2736 | outrel.r_addend = 0; | |
2737 | htab->srelgot->reloc_count++; | |
2738 | loc += sizeof (Elf64_External_Rela); | |
2739 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2740 | } | |
2741 | } | |
2742 | ||
2743 | if (h != NULL) | |
2744 | h->got.offset |= 1; | |
2745 | else | |
2746 | local_got_offsets[r_symndx] |= 1; | |
2747 | } | |
2748 | ||
2749 | if (off >= (bfd_vma) -2) | |
2750 | abort (); | |
2751 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2752 | { | |
2753 | relocation = htab->sgot->output_offset + off; | |
2754 | if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) | |
2755 | relocation += htab->sgot->output_section->vma; | |
2756 | unresolved_reloc = FALSE; | |
2757 | } | |
2758 | else | |
2759 | { | |
2760 | bfd_put_64 (output_bfd, htab->sgot->output_offset + off, | |
2761 | contents + rel->r_offset); | |
2762 | continue; | |
2763 | } | |
2764 | break; | |
2765 | ||
2766 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 2767 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
2768 | case R_390_TLS_IEENT: |
2769 | if (h == NULL) | |
2770 | { | |
2771 | if (local_got_offsets == NULL) | |
2772 | abort(); | |
2773 | off = local_got_offsets[r_symndx]; | |
2774 | if (info->shared) | |
2775 | goto emit_tls_relocs; | |
2776 | } | |
2777 | else | |
2778 | { | |
2779 | off = h->got.offset; | |
2780 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2781 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2782 | goto emit_tls_relocs; | |
2783 | } | |
2784 | ||
2785 | if (htab->sgot == NULL) | |
2786 | abort (); | |
2787 | ||
2788 | BFD_ASSERT (! unresolved_reloc); | |
2789 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2790 | htab->sgot->contents + off); | |
2791 | relocation = htab->sgot->output_offset + off; | |
2792 | if (r_type == R_390_TLS_IEENT) | |
2793 | relocation += htab->sgot->output_section->vma; | |
2794 | unresolved_reloc = FALSE; | |
2795 | break; | |
2796 | ||
2797 | case R_390_TLS_LDM64: | |
2798 | if (! info->shared) | |
2799 | /* The literal pool entry this relocation refers to gets ignored | |
2800 | by the optimized code of the local exec model. Do nothing | |
2801 | and the value will turn out zero. */ | |
2802 | continue; | |
2803 | ||
2804 | if (htab->sgot == NULL) | |
2805 | abort (); | |
2806 | ||
2807 | off = htab->tls_ldm_got.offset; | |
2808 | if (off & 1) | |
2809 | off &= ~1; | |
2810 | else | |
2811 | { | |
2812 | Elf_Internal_Rela outrel; | |
2813 | bfd_byte *loc; | |
2814 | ||
2815 | if (htab->srelgot == NULL) | |
2816 | abort (); | |
2817 | ||
2818 | outrel.r_offset = (htab->sgot->output_section->vma | |
2819 | + htab->sgot->output_offset + off); | |
2820 | ||
2821 | bfd_put_64 (output_bfd, 0, | |
2822 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2823 | outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); | |
2824 | outrel.r_addend = 0; | |
2825 | loc = htab->srelgot->contents; | |
2826 | loc += htab->srelgot->reloc_count++ | |
2827 | * sizeof (Elf64_External_Rela); | |
2828 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2829 | htab->tls_ldm_got.offset |= 1; | |
2830 | } | |
2831 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2832 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2833 | break; |
2834 | ||
2835 | case R_390_TLS_LE64: | |
2836 | if (info->shared) | |
2837 | { | |
2838 | /* Linking a shared library with non-fpic code requires | |
2839 | a R_390_TLS_TPOFF relocation. */ | |
2840 | Elf_Internal_Rela outrel; | |
2841 | asection *sreloc; | |
2842 | bfd_byte *loc; | |
2843 | int indx; | |
2844 | ||
2845 | outrel.r_offset = rel->r_offset | |
2846 | + input_section->output_section->vma | |
2847 | + input_section->output_offset; | |
2848 | if (h != NULL && h->dynindx != -1) | |
2849 | indx = h->dynindx; | |
2850 | else | |
2851 | indx = 0; | |
2852 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); | |
2853 | if (indx == 0) | |
2854 | outrel.r_addend = relocation - dtpoff_base (info); | |
2855 | else | |
2856 | outrel.r_addend = 0; | |
2857 | sreloc = elf_section_data (input_section)->sreloc; | |
2858 | if (sreloc == NULL) | |
2859 | abort (); | |
2860 | loc = sreloc->contents; | |
2861 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2862 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2863 | } | |
2864 | else | |
2865 | { | |
2866 | BFD_ASSERT (! unresolved_reloc); | |
2867 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2868 | contents + rel->r_offset); | |
2869 | } | |
2870 | continue; | |
2871 | ||
2872 | case R_390_TLS_LDO64: | |
2873 | if (info->shared || (input_section->flags & SEC_CODE) == 0) | |
2874 | relocation -= dtpoff_base (info); | |
2875 | else | |
2876 | /* When converting LDO to LE, we must negate. */ | |
2877 | relocation = -tpoff (info, relocation); | |
2878 | break; | |
2879 | ||
2880 | /* Relocations for tls instructions. */ | |
2881 | case R_390_TLS_LOAD: | |
2882 | case R_390_TLS_GDCALL: | |
2883 | case R_390_TLS_LDCALL: | |
2884 | tls_type = GOT_UNKNOWN; | |
2885 | if (h == NULL && local_got_offsets) | |
2886 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2887 | else if (h != NULL) | |
2888 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2889 | ||
2890 | if (tls_type == GOT_TLS_GD) | |
2891 | continue; | |
2892 | ||
2893 | if (r_type == R_390_TLS_LOAD) | |
2894 | { | |
2895 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2896 | { | |
2897 | /* IE->LE transition. Four valid cases: | |
2898 | lg %rx,(0,%ry) -> sllg %rx,%ry,0 | |
2899 | lg %rx,(%ry,0) -> sllg %rx,%ry,0 | |
2900 | lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 | |
2901 | lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2902 | unsigned int insn0, insn1, ry; | |
2903 | ||
2904 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2905 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2906 | if (insn1 != 0x0004) | |
2907 | invalid_tls_insn (input_bfd, input_section, rel); | |
2908 | ry = 0; | |
2909 | if ((insn0 & 0xff00f000) == 0xe3000000) | |
2910 | /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ | |
2911 | ry = (insn0 & 0x000f0000); | |
2912 | else if ((insn0 & 0xff0f0000) == 0xe3000000) | |
2913 | /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ | |
2914 | ry = (insn0 & 0x0000f000) << 4; | |
2915 | else if ((insn0 & 0xff00f000) == 0xe300c000) | |
2916 | /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ | |
2917 | ry = (insn0 & 0x000f0000); | |
2918 | else if ((insn0 & 0xff0f0000) == 0xe30c0000) | |
2919 | /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2920 | ry = (insn0 & 0x0000f000) << 4; | |
2921 | else | |
2922 | invalid_tls_insn (input_bfd, input_section, rel); | |
2923 | insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; | |
2924 | insn1 = 0x000d; | |
2925 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2926 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2927 | } | |
2928 | } | |
2929 | else if (r_type == R_390_TLS_GDCALL) | |
2930 | { | |
2931 | unsigned int insn0, insn1; | |
2932 | ||
2933 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2934 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2935 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2936 | invalid_tls_insn (input_bfd, input_section, rel); | |
2937 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2938 | { | |
2939 | /* GD->LE transition. | |
2940 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2941 | insn0 = 0xc0040000; | |
2942 | insn1 = 0x0000; | |
2943 | } | |
2944 | else | |
2945 | { | |
2946 | /* GD->IE transition. | |
2947 | brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ | |
2948 | insn0 = 0xe322c000; | |
2949 | insn1 = 0x0004; | |
2950 | } | |
2951 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2952 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2953 | } | |
2954 | else if (r_type == R_390_TLS_LDCALL) | |
2955 | { | |
2956 | if (!info->shared) | |
2957 | { | |
2958 | unsigned int insn0, insn1; | |
2959 | ||
2960 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2961 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2962 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2963 | invalid_tls_insn (input_bfd, input_section, rel); | |
2964 | /* LD->LE transition. | |
2965 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2966 | insn0 = 0xc0040000; | |
2967 | insn1 = 0x0000; | |
2968 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2969 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2970 | } | |
2971 | } | |
2972 | continue; | |
2973 | ||
947216bf AM |
2974 | default: |
2975 | break; | |
2976 | } | |
a85d7ed0 | 2977 | |
239e1f3a AM |
2978 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2979 | because such sections are not SEC_ALLOC and thus ld.so will | |
2980 | not process them. */ | |
0451c93c | 2981 | if (unresolved_reloc |
239e1f3a | 2982 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
0451c93c MS |
2983 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
2984 | (*_bfd_error_handler) | |
2985 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
2986 | bfd_archive_filename (input_bfd), | |
2987 | bfd_get_section_name (input_bfd, input_section), | |
2988 | (long) rel->r_offset, | |
2989 | h->root.root.string); | |
2990 | ||
bd1ea41b MS |
2991 | if (r_type == R_390_20 |
2992 | || r_type == R_390_GOT20 | |
2993 | || r_type == R_390_GOTPLT20 | |
2994 | || r_type == R_390_TLS_GOTIE20) | |
2995 | { | |
2996 | relocation += rel->r_addend; | |
2997 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; | |
2998 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2999 | contents, rel->r_offset, | |
3000 | relocation, 0); | |
3001 | } | |
3002 | else | |
3003 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
a85d7ed0 NC |
3004 | contents, rel->r_offset, |
3005 | relocation, rel->r_addend); | |
3006 | ||
3007 | if (r != bfd_reloc_ok) | |
3008 | { | |
0451c93c | 3009 | const char *name; |
ec338859 | 3010 | |
0451c93c MS |
3011 | if (h != NULL) |
3012 | name = h->root.root.string; | |
3013 | else | |
a85d7ed0 | 3014 | { |
0451c93c MS |
3015 | name = bfd_elf_string_from_elf_section (input_bfd, |
3016 | symtab_hdr->sh_link, | |
3017 | sym->st_name); | |
3018 | if (name == NULL) | |
b34976b6 | 3019 | return FALSE; |
0451c93c MS |
3020 | if (*name == '\0') |
3021 | name = bfd_section_name (input_bfd, sec); | |
3022 | } | |
ec338859 | 3023 | |
0451c93c MS |
3024 | if (r == bfd_reloc_overflow) |
3025 | { | |
ec338859 | 3026 | |
0451c93c MS |
3027 | if (! ((*info->callbacks->reloc_overflow) |
3028 | (info, name, howto->name, (bfd_vma) 0, | |
3029 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 3030 | return FALSE; |
0451c93c MS |
3031 | } |
3032 | else | |
3033 | { | |
3034 | (*_bfd_error_handler) | |
3035 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
3036 | bfd_archive_filename (input_bfd), | |
3037 | bfd_get_section_name (input_bfd, input_section), | |
3038 | (long) rel->r_offset, name, (int) r); | |
b34976b6 | 3039 | return FALSE; |
a85d7ed0 NC |
3040 | } |
3041 | } | |
3042 | } | |
3043 | ||
b34976b6 | 3044 | return TRUE; |
a85d7ed0 NC |
3045 | } |
3046 | ||
3047 | /* Finish up dynamic symbol handling. We set the contents of various | |
3048 | dynamic sections here. */ | |
3049 | ||
b34976b6 | 3050 | static bfd_boolean |
a85d7ed0 NC |
3051 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
3052 | bfd *output_bfd; | |
3053 | struct bfd_link_info *info; | |
3054 | struct elf_link_hash_entry *h; | |
3055 | Elf_Internal_Sym *sym; | |
3056 | { | |
0451c93c | 3057 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 | 3058 | |
0451c93c | 3059 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
3060 | |
3061 | if (h->plt.offset != (bfd_vma) -1) | |
3062 | { | |
a85d7ed0 | 3063 | bfd_vma plt_index; |
0451c93c MS |
3064 | bfd_vma got_offset; |
3065 | Elf_Internal_Rela rela; | |
947216bf | 3066 | bfd_byte *loc; |
a85d7ed0 NC |
3067 | |
3068 | /* This symbol has an entry in the procedure linkage table. Set | |
947216bf | 3069 | it up. */ |
a85d7ed0 | 3070 | |
0451c93c MS |
3071 | if (h->dynindx == -1 |
3072 | || htab->splt == NULL | |
3073 | || htab->sgotplt == NULL | |
3074 | || htab->srelplt == NULL) | |
3075 | abort (); | |
a85d7ed0 | 3076 | |
99c79b2e | 3077 | /* Calc. index no. |
947216bf | 3078 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
3079 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
3080 | ||
3081 | /* Offset in GOT is PLT index plus GOT headers(3) times 8, | |
947216bf | 3082 | addr & GOT addr. */ |
a85d7ed0 NC |
3083 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3084 | ||
3085 | /* Fill in the blueprint of a PLT. */ | |
0451c93c MS |
3086 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
3087 | htab->splt->contents + h->plt.offset); | |
3088 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
3089 | htab->splt->contents + h->plt.offset + 4); | |
3090 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
3091 | htab->splt->contents + h->plt.offset + 8); | |
3092 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
3093 | htab->splt->contents + h->plt.offset + 12); | |
3094 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
3095 | htab->splt->contents + h->plt.offset + 16); | |
3096 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5, | |
3097 | htab->splt->contents + h->plt.offset + 20); | |
3098 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6, | |
3099 | htab->splt->contents + h->plt.offset + 24); | |
3100 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7, | |
3101 | htab->splt->contents + h->plt.offset + 28); | |
a85d7ed0 NC |
3102 | /* Fixup the relative address to the GOT entry */ |
3103 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3104 | (htab->sgotplt->output_section->vma + |
3105 | htab->sgotplt->output_offset + got_offset | |
3106 | - (htab->splt->output_section->vma + h->plt.offset))/2, | |
3107 | htab->splt->contents + h->plt.offset + 2); | |
a85d7ed0 NC |
3108 | /* Fixup the relative branch to PLT 0 */ |
3109 | bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + | |
3110 | (PLT_ENTRY_SIZE * plt_index) + 22)/2, | |
0451c93c | 3111 | htab->splt->contents + h->plt.offset + 24); |
a85d7ed0 NC |
3112 | /* Fixup offset into symbol table */ |
3113 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), | |
0451c93c | 3114 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3115 | |
3116 | /* Fill in the entry in the global offset table. | |
947216bf | 3117 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3118 | bfd_put_64 (output_bfd, |
0451c93c MS |
3119 | (htab->splt->output_section->vma |
3120 | + htab->splt->output_offset | |
a85d7ed0 NC |
3121 | + h->plt.offset |
3122 | + 14), | |
0451c93c | 3123 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3124 | |
0451c93c MS |
3125 | /* Fill in the entry in the .rela.plt section. */ |
3126 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3127 | + htab->sgotplt->output_offset | |
3128 | + got_offset); | |
3129 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3130 | rela.r_addend = 0; | |
947216bf | 3131 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
0451c93c | 3132 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3133 | |
3134 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3135 | { | |
3136 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3137 | the .plt section. Leave the value alone. This is a clue |
3138 | for the dynamic linker, to make function pointer | |
3139 | comparisons work between an application and shared | |
3140 | library. */ | |
a85d7ed0 NC |
3141 | sym->st_shndx = SHN_UNDEF; |
3142 | } | |
3143 | } | |
3144 | ||
69fc87f1 MS |
3145 | if (h->got.offset != (bfd_vma) -1 |
3146 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3147 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3148 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3149 | { |
a85d7ed0 | 3150 | Elf_Internal_Rela rela; |
947216bf | 3151 | bfd_byte *loc; |
a85d7ed0 NC |
3152 | |
3153 | /* This symbol has an entry in the global offset table. Set it | |
947216bf | 3154 | up. */ |
0451c93c MS |
3155 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3156 | abort (); | |
a85d7ed0 | 3157 | |
0451c93c MS |
3158 | rela.r_offset = (htab->sgot->output_section->vma |
3159 | + htab->sgot->output_offset | |
dc810e39 | 3160 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3161 | |
3162 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3163 | symbol is defined locally or was forced to be local because | |
3164 | of a version file, we just want to emit a RELATIVE reloc. | |
3165 | The entry in the global offset table will already have been | |
3166 | initialized in the relocate_section function. */ | |
0451c93c MS |
3167 | if (info->shared |
3168 | && (info->symbolic | |
3169 | || h->dynindx == -1 | |
3170 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
3171 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
947216bf | 3172 | { |
0451c93c | 3173 | BFD_ASSERT((h->got.offset & 1) != 0); |
947216bf AM |
3174 | rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
3175 | rela.r_addend = (h->root.u.def.value | |
3176 | + h->root.u.def.section->output_section->vma | |
3177 | + h->root.u.def.section->output_offset); | |
3178 | } | |
a85d7ed0 NC |
3179 | else |
3180 | { | |
3181 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3182 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3183 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); |
947216bf AM |
3184 | rela.r_addend = 0; |
3185 | } | |
a85d7ed0 | 3186 | |
947216bf AM |
3187 | loc = htab->srelgot->contents; |
3188 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3189 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3190 | } |
3191 | ||
3192 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3193 | { | |
a85d7ed0 | 3194 | Elf_Internal_Rela rela; |
947216bf | 3195 | bfd_byte *loc; |
a85d7ed0 NC |
3196 | |
3197 | /* This symbols needs a copy reloc. Set it up. */ | |
3198 | ||
0451c93c MS |
3199 | if (h->dynindx == -1 |
3200 | || (h->root.type != bfd_link_hash_defined | |
3201 | && h->root.type != bfd_link_hash_defweak) | |
3202 | || htab->srelbss == NULL) | |
3203 | abort (); | |
a85d7ed0 NC |
3204 | |
3205 | rela.r_offset = (h->root.u.def.value | |
3206 | + h->root.u.def.section->output_section->vma | |
3207 | + h->root.u.def.section->output_offset); | |
3208 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); | |
3209 | rela.r_addend = 0; | |
947216bf AM |
3210 | loc = htab->srelbss->contents; |
3211 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3212 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3213 | } |
3214 | ||
3215 | /* Mark some specially defined symbols as absolute. */ | |
3216 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3217 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3218 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3219 | sym->st_shndx = SHN_ABS; | |
3220 | ||
b34976b6 | 3221 | return TRUE; |
a85d7ed0 NC |
3222 | } |
3223 | ||
0451c93c MS |
3224 | /* Used to decide how to sort relocs in an optimal manner for the |
3225 | dynamic linker, before writing them out. */ | |
3226 | ||
3227 | static enum elf_reloc_type_class | |
3228 | elf_s390_reloc_type_class (rela) | |
3229 | const Elf_Internal_Rela *rela; | |
3230 | { | |
3231 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3232 | { | |
3233 | case R_390_RELATIVE: | |
3234 | return reloc_class_relative; | |
3235 | case R_390_JMP_SLOT: | |
3236 | return reloc_class_plt; | |
3237 | case R_390_COPY: | |
3238 | return reloc_class_copy; | |
3239 | default: | |
3240 | return reloc_class_normal; | |
3241 | } | |
3242 | } | |
3243 | ||
a85d7ed0 NC |
3244 | /* Finish up the dynamic sections. */ |
3245 | ||
b34976b6 | 3246 | static bfd_boolean |
a85d7ed0 NC |
3247 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3248 | bfd *output_bfd; | |
3249 | struct bfd_link_info *info; | |
3250 | { | |
0451c93c | 3251 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3252 | bfd *dynobj; |
3253 | asection *sdyn; | |
a85d7ed0 | 3254 | |
0451c93c MS |
3255 | htab = elf_s390_hash_table (info); |
3256 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3257 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3258 | ||
0451c93c | 3259 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3260 | { |
a85d7ed0 NC |
3261 | Elf64_External_Dyn *dyncon, *dynconend; |
3262 | ||
0451c93c MS |
3263 | if (sdyn == NULL || htab->sgot == NULL) |
3264 | abort (); | |
a85d7ed0 NC |
3265 | |
3266 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
3267 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
3268 | for (; dyncon < dynconend; dyncon++) | |
3269 | { | |
3270 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3271 | asection *s; |
ec338859 | 3272 | |
a85d7ed0 | 3273 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3274 | |
a85d7ed0 NC |
3275 | switch (dyn.d_tag) |
3276 | { | |
3277 | default: | |
0451c93c | 3278 | continue; |
ec338859 | 3279 | |
a85d7ed0 | 3280 | case DT_PLTGOT: |
0451c93c MS |
3281 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3282 | break; | |
ec338859 | 3283 | |
a85d7ed0 | 3284 | case DT_JMPREL: |
0451c93c | 3285 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 | 3286 | break; |
ec338859 | 3287 | |
a85d7ed0 | 3288 | case DT_PLTRELSZ: |
0451c93c | 3289 | s = htab->srelplt->output_section; |
a85d7ed0 NC |
3290 | if (s->_cooked_size != 0) |
3291 | dyn.d_un.d_val = s->_cooked_size; | |
3292 | else | |
3293 | dyn.d_un.d_val = s->_raw_size; | |
a85d7ed0 | 3294 | break; |
ec338859 | 3295 | |
a85d7ed0 NC |
3296 | case DT_RELASZ: |
3297 | /* The procedure linkage table relocs (DT_JMPREL) should | |
3298 | not be included in the overall relocs (DT_RELA). | |
3299 | Therefore, we override the DT_RELASZ entry here to | |
3300 | make it not include the JMPREL relocs. Since the | |
3301 | linker script arranges for .rela.plt to follow all | |
3302 | other relocation sections, we don't have to worry | |
3303 | about changing the DT_RELA entry. */ | |
0451c93c MS |
3304 | s = htab->srelplt->output_section; |
3305 | if (s->_cooked_size != 0) | |
3306 | dyn.d_un.d_val -= s->_cooked_size; | |
3307 | else | |
3308 | dyn.d_un.d_val -= s->_raw_size; | |
a85d7ed0 NC |
3309 | break; |
3310 | } | |
0451c93c MS |
3311 | |
3312 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3313 | } |
3314 | ||
3315 | /* Fill in the special first entry in the procedure linkage table. */ | |
0451c93c | 3316 | if (htab->splt && htab->splt->_raw_size > 0) |
a85d7ed0 NC |
3317 | { |
3318 | /* fill in blueprint for plt 0 entry */ | |
0451c93c MS |
3319 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0, |
3320 | htab->splt->contents ); | |
3321 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3322 | htab->splt->contents +4 ); | |
3323 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3324 | htab->splt->contents +12 ); | |
3325 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3326 | htab->splt->contents +16 ); | |
3327 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3328 | htab->splt->contents +20 ); | |
3329 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6, | |
3330 | htab->splt->contents + 24); | |
3331 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7, | |
3332 | htab->splt->contents + 28 ); | |
a85d7ed0 NC |
3333 | /* Fixup relative address to start of GOT */ |
3334 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3335 | (htab->sgotplt->output_section->vma + |
3336 | htab->sgotplt->output_offset | |
3337 | - htab->splt->output_section->vma - 6)/2, | |
3338 | htab->splt->contents + 8); | |
a85d7ed0 | 3339 | } |
0451c93c MS |
3340 | elf_section_data (htab->splt->output_section) |
3341 | ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; | |
a85d7ed0 NC |
3342 | } |
3343 | ||
0451c93c | 3344 | if (htab->sgotplt) |
a85d7ed0 | 3345 | { |
0451c93c MS |
3346 | /* Fill in the first three entries in the global offset table. */ |
3347 | if (htab->sgotplt->_raw_size > 0) | |
3348 | { | |
3349 | bfd_put_64 (output_bfd, | |
3350 | (sdyn == NULL ? (bfd_vma) 0 | |
3351 | : sdyn->output_section->vma + sdyn->output_offset), | |
3352 | htab->sgotplt->contents); | |
3353 | /* One entry for shared object struct ptr. */ | |
3354 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3355 | /* One entry for _dl_runtime_resolve. */ | |
3356 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12); | |
3357 | } | |
a85d7ed0 | 3358 | |
0451c93c MS |
3359 | elf_section_data (htab->sgot->output_section) |
3360 | ->this_hdr.sh_entsize = 8; | |
3361 | } | |
b34976b6 | 3362 | return TRUE; |
a85d7ed0 NC |
3363 | } |
3364 | ||
ae9a127f NC |
3365 | /* Why was the hash table entry size definition changed from |
3366 | ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and | |
3367 | this is the only reason for the s390_elf64_size_info structure. */ | |
a85d7ed0 NC |
3368 | |
3369 | const struct elf_size_info s390_elf64_size_info = | |
3370 | { | |
3371 | sizeof (Elf64_External_Ehdr), | |
3372 | sizeof (Elf64_External_Phdr), | |
3373 | sizeof (Elf64_External_Shdr), | |
3374 | sizeof (Elf64_External_Rel), | |
3375 | sizeof (Elf64_External_Rela), | |
3376 | sizeof (Elf64_External_Sym), | |
3377 | sizeof (Elf64_External_Dyn), | |
3378 | sizeof (Elf_External_Note), | |
ae9a127f NC |
3379 | 8, /* hash-table entry size. */ |
3380 | 1, /* internal relocations per external relocations. */ | |
3381 | 64, /* arch_size. */ | |
45d6a902 | 3382 | 3, /* log_file_align. */ |
a85d7ed0 NC |
3383 | ELFCLASS64, EV_CURRENT, |
3384 | bfd_elf64_write_out_phdrs, | |
3385 | bfd_elf64_write_shdrs_and_ehdr, | |
3386 | bfd_elf64_write_relocs, | |
73ff0d56 | 3387 | bfd_elf64_swap_symbol_in, |
a85d7ed0 NC |
3388 | bfd_elf64_swap_symbol_out, |
3389 | bfd_elf64_slurp_reloc_table, | |
3390 | bfd_elf64_slurp_symbol_table, | |
3391 | bfd_elf64_swap_dyn_in, | |
3392 | bfd_elf64_swap_dyn_out, | |
947216bf AM |
3393 | bfd_elf64_swap_reloc_in, |
3394 | bfd_elf64_swap_reloc_out, | |
3395 | bfd_elf64_swap_reloca_in, | |
3396 | bfd_elf64_swap_reloca_out | |
a85d7ed0 NC |
3397 | }; |
3398 | ||
3399 | #define TARGET_BIG_SYM bfd_elf64_s390_vec | |
3400 | #define TARGET_BIG_NAME "elf64-s390" | |
3401 | #define ELF_ARCH bfd_arch_s390 | |
3402 | #define ELF_MACHINE_CODE EM_S390 | |
3403 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3404 | #define ELF_MAXPAGESIZE 0x1000 | |
3405 | ||
3406 | #define elf_backend_size_info s390_elf64_size_info | |
3407 | ||
3408 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3409 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3410 | #define elf_backend_want_got_plt 1 |
3411 | #define elf_backend_plt_readonly 1 | |
3412 | #define elf_backend_want_plt_sym 0 | |
3413 | #define elf_backend_got_header_size 24 | |
3414 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
b491616a | 3415 | #define elf_backend_rela_normal 1 |
a85d7ed0 NC |
3416 | |
3417 | #define elf_info_to_howto elf_s390_info_to_howto | |
3418 | ||
a85d7ed0 NC |
3419 | #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name |
3420 | #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3421 | #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
3422 | ||
3423 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
3424 | #define elf_backend_check_relocs elf_s390_check_relocs | |
0451c93c MS |
3425 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3426 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3427 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3428 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
3429 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook | |
3430 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3431 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
a85d7ed0 NC |
3432 | #define elf_backend_relocate_section elf_s390_relocate_section |
3433 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections | |
29c2fb7c | 3434 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
a85d7ed0 | 3435 | |
69fc87f1 MS |
3436 | #define bfd_elf64_mkobject elf_s390_mkobject |
3437 | #define elf_backend_object_p elf_s390_object_p | |
a85d7ed0 NC |
3438 | |
3439 | #include "elf64-target.h" |