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