Commit | Line | Data |
---|---|---|
a85d7ed0 | 1 | /* IBM S/390-specific support for 32-bit ELF |
a779acda | 2 | Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
a85d7ed0 NC |
3 | Contributed by Carl B. Pedersen and Martin Schwidefsky. |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "bfdlink.h" | |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | ||
28 | static reloc_howto_type *elf_s390_reloc_type_lookup | |
29 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
30 | static void elf_s390_info_to_howto | |
31 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
b34976b6 | 32 | static bfd_boolean elf_s390_is_local_label_name |
0451c93c MS |
33 | PARAMS ((bfd *, const char *)); |
34 | static struct bfd_hash_entry *link_hash_newfunc | |
a85d7ed0 NC |
35 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
36 | static struct bfd_link_hash_table *elf_s390_link_hash_table_create | |
37 | PARAMS ((bfd *)); | |
b34976b6 | 38 | static bfd_boolean create_got_section |
0451c93c | 39 | PARAMS((bfd *, struct bfd_link_info *)); |
b34976b6 | 40 | static bfd_boolean elf_s390_create_dynamic_sections |
0451c93c MS |
41 | PARAMS((bfd *, struct bfd_link_info *)); |
42 | static void elf_s390_copy_indirect_symbol | |
b48fa14c AM |
43 | PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, |
44 | struct elf_link_hash_entry *)); | |
b34976b6 | 45 | static bfd_boolean elf_s390_check_relocs |
a85d7ed0 NC |
46 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
47 | const Elf_Internal_Rela *)); | |
5a65713f | 48 | static asection *elf_s390_gc_mark_hook |
1e2f5b6e | 49 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
0451c93c | 50 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 51 | static bfd_boolean elf_s390_gc_sweep_hook |
5a65713f 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 *)); | |
b34976b6 AM |
77 | static bfd_boolean elf_s390_object_p |
78 | PARAMS ((bfd *)); | |
79 | static bfd_boolean elf_s390_grok_prstatus | |
80 | PARAMS ((bfd *, Elf_Internal_Note *)); | |
69fc87f1 MS |
81 | static int elf_s390_tls_transition |
82 | PARAMS ((struct bfd_link_info *, int, int)); | |
83 | static bfd_reloc_status_type s390_tls_reloc | |
84 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
85 | static bfd_vma dtpoff_base | |
86 | PARAMS ((struct bfd_link_info *)); | |
87 | static bfd_vma tpoff | |
88 | PARAMS ((struct bfd_link_info *, bfd_vma)); | |
89 | static void invalid_tls_insn | |
90 | PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); | |
a85d7ed0 | 91 | |
a85d7ed0 NC |
92 | #include "elf/s390.h" |
93 | ||
94 | /* The relocation "howto" table. */ | |
95 | ||
96 | static reloc_howto_type elf_howto_table[] = | |
97 | { | |
98 | HOWTO (R_390_NONE, /* type */ | |
99 | 0, /* rightshift */ | |
100 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
101 | 0, /* bitsize */ | |
b34976b6 | 102 | FALSE, /* pc_relative */ |
a85d7ed0 NC |
103 | 0, /* bitpos */ |
104 | complain_overflow_dont, /* complain_on_overflow */ | |
105 | bfd_elf_generic_reloc, /* special_function */ | |
106 | "R_390_NONE", /* name */ | |
b34976b6 | 107 | FALSE, /* partial_inplace */ |
a85d7ed0 NC |
108 | 0, /* src_mask */ |
109 | 0, /* dst_mask */ | |
b34976b6 AM |
110 | FALSE), /* pcrel_offset */ |
111 | ||
5236c819 MS |
112 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
113 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), | |
114 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
115 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), | |
116 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
117 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), | |
118 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
119 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), | |
120 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
121 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), | |
122 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
123 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), | |
124 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
125 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), | |
126 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
127 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), | |
128 | HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
129 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), | |
130 | HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
131 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), | |
132 | HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
133 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), | |
134 | HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
135 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), | |
136 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
137 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), | |
138 | HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
139 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), | |
140 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
141 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), | |
142 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
143 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), | |
144 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), | |
146 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
147 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), | |
148 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
149 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), | |
150 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
151 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), | |
152 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
153 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), | |
154 | EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ | |
155 | EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ | |
156 | EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ | |
157 | EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ | |
158 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
159 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), | |
160 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
161 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
162 | EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ | |
163 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
164 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), | |
165 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
166 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), | |
167 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
168 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), | |
169 | EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ | |
170 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
171 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), | |
172 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
173 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
174 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
175 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), | |
176 | EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ | |
69fc87f1 MS |
177 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
178 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), | |
179 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
180 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), | |
181 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
182 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), | |
183 | HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
184 | bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), | |
185 | EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ | |
186 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
187 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), | |
188 | HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
189 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), | |
190 | EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ | |
191 | HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
192 | bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), | |
193 | EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ | |
194 | HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), | |
196 | EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ | |
197 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
198 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), | |
199 | HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
200 | bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), | |
201 | EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ | |
202 | HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
203 | bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), | |
204 | EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ | |
205 | HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
206 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), | |
207 | HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
208 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), | |
209 | HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
210 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), | |
a85d7ed0 NC |
211 | }; |
212 | ||
213 | /* GNU extension to record C++ vtable hierarchy. */ | |
214 | static reloc_howto_type elf32_s390_vtinherit_howto = | |
b34976b6 | 215 | HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
a85d7ed0 | 216 | static reloc_howto_type elf32_s390_vtentry_howto = |
b34976b6 | 217 | HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); |
a85d7ed0 NC |
218 | |
219 | static reloc_howto_type * | |
220 | elf_s390_reloc_type_lookup (abfd, code) | |
221 | bfd *abfd ATTRIBUTE_UNUSED; | |
222 | bfd_reloc_code_real_type code; | |
223 | { | |
ec338859 | 224 | switch (code) |
0451c93c MS |
225 | { |
226 | case BFD_RELOC_NONE: | |
227 | return &elf_howto_table[(int) R_390_NONE]; | |
228 | case BFD_RELOC_8: | |
229 | return &elf_howto_table[(int) R_390_8]; | |
230 | case BFD_RELOC_390_12: | |
231 | return &elf_howto_table[(int) R_390_12]; | |
232 | case BFD_RELOC_16: | |
233 | return &elf_howto_table[(int) R_390_16]; | |
234 | case BFD_RELOC_32: | |
235 | return &elf_howto_table[(int) R_390_32]; | |
236 | case BFD_RELOC_CTOR: | |
237 | return &elf_howto_table[(int) R_390_32]; | |
238 | case BFD_RELOC_32_PCREL: | |
239 | return &elf_howto_table[(int) R_390_PC32]; | |
240 | case BFD_RELOC_390_GOT12: | |
241 | return &elf_howto_table[(int) R_390_GOT12]; | |
242 | case BFD_RELOC_32_GOT_PCREL: | |
243 | return &elf_howto_table[(int) R_390_GOT32]; | |
244 | case BFD_RELOC_390_PLT32: | |
245 | return &elf_howto_table[(int) R_390_PLT32]; | |
246 | case BFD_RELOC_390_COPY: | |
247 | return &elf_howto_table[(int) R_390_COPY]; | |
248 | case BFD_RELOC_390_GLOB_DAT: | |
249 | return &elf_howto_table[(int) R_390_GLOB_DAT]; | |
250 | case BFD_RELOC_390_JMP_SLOT: | |
251 | return &elf_howto_table[(int) R_390_JMP_SLOT]; | |
252 | case BFD_RELOC_390_RELATIVE: | |
253 | return &elf_howto_table[(int) R_390_RELATIVE]; | |
254 | case BFD_RELOC_32_GOTOFF: | |
5236c819 | 255 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
0451c93c MS |
256 | case BFD_RELOC_390_GOTPC: |
257 | return &elf_howto_table[(int) R_390_GOTPC]; | |
258 | case BFD_RELOC_390_GOT16: | |
259 | return &elf_howto_table[(int) R_390_GOT16]; | |
260 | case BFD_RELOC_16_PCREL: | |
261 | return &elf_howto_table[(int) R_390_PC16]; | |
262 | case BFD_RELOC_390_PC16DBL: | |
263 | return &elf_howto_table[(int) R_390_PC16DBL]; | |
264 | case BFD_RELOC_390_PLT16DBL: | |
265 | return &elf_howto_table[(int) R_390_PLT16DBL]; | |
befc3abb MS |
266 | case BFD_RELOC_390_PC32DBL: |
267 | return &elf_howto_table[(int) R_390_PC32DBL]; | |
268 | case BFD_RELOC_390_PLT32DBL: | |
269 | return &elf_howto_table[(int) R_390_PLT32DBL]; | |
270 | case BFD_RELOC_390_GOTPCDBL: | |
271 | return &elf_howto_table[(int) R_390_GOTPCDBL]; | |
272 | case BFD_RELOC_390_GOTENT: | |
273 | return &elf_howto_table[(int) R_390_GOTENT]; | |
5236c819 MS |
274 | case BFD_RELOC_16_GOTOFF: |
275 | return &elf_howto_table[(int) R_390_GOTOFF16]; | |
276 | case BFD_RELOC_390_GOTPLT12: | |
277 | return &elf_howto_table[(int) R_390_GOTPLT12]; | |
278 | case BFD_RELOC_390_GOTPLT16: | |
279 | return &elf_howto_table[(int) R_390_GOTPLT16]; | |
280 | case BFD_RELOC_390_GOTPLT32: | |
281 | return &elf_howto_table[(int) R_390_GOTPLT32]; | |
282 | case BFD_RELOC_390_GOTPLTENT: | |
283 | return &elf_howto_table[(int) R_390_GOTPLTENT]; | |
284 | case BFD_RELOC_390_PLTOFF16: | |
285 | return &elf_howto_table[(int) R_390_PLTOFF16]; | |
286 | case BFD_RELOC_390_PLTOFF32: | |
287 | return &elf_howto_table[(int) R_390_PLTOFF32]; | |
69fc87f1 MS |
288 | case BFD_RELOC_390_TLS_LOAD: |
289 | return &elf_howto_table[(int) R_390_TLS_LOAD]; | |
290 | case BFD_RELOC_390_TLS_GDCALL: | |
291 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; | |
292 | case BFD_RELOC_390_TLS_LDCALL: | |
293 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; | |
294 | case BFD_RELOC_390_TLS_GD32: | |
295 | return &elf_howto_table[(int) R_390_TLS_GD32]; | |
296 | case BFD_RELOC_390_TLS_GOTIE12: | |
297 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; | |
298 | case BFD_RELOC_390_TLS_GOTIE32: | |
299 | return &elf_howto_table[(int) R_390_TLS_GOTIE32]; | |
300 | case BFD_RELOC_390_TLS_LDM32: | |
301 | return &elf_howto_table[(int) R_390_TLS_LDM32]; | |
302 | case BFD_RELOC_390_TLS_IE32: | |
303 | return &elf_howto_table[(int) R_390_TLS_IE32]; | |
304 | case BFD_RELOC_390_TLS_IEENT: | |
305 | return &elf_howto_table[(int) R_390_TLS_IEENT]; | |
306 | case BFD_RELOC_390_TLS_LE32: | |
307 | return &elf_howto_table[(int) R_390_TLS_LE32]; | |
308 | case BFD_RELOC_390_TLS_LDO32: | |
309 | return &elf_howto_table[(int) R_390_TLS_LDO32]; | |
310 | case BFD_RELOC_390_TLS_DTPMOD: | |
311 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; | |
312 | case BFD_RELOC_390_TLS_DTPOFF: | |
313 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; | |
314 | case BFD_RELOC_390_TLS_TPOFF: | |
315 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; | |
0451c93c MS |
316 | case BFD_RELOC_VTABLE_INHERIT: |
317 | return &elf32_s390_vtinherit_howto; | |
318 | case BFD_RELOC_VTABLE_ENTRY: | |
319 | return &elf32_s390_vtentry_howto; | |
320 | default: | |
321 | break; | |
322 | } | |
a85d7ed0 NC |
323 | return 0; |
324 | } | |
325 | ||
326 | /* We need to use ELF32_R_TYPE so we have our own copy of this function, | |
327 | and elf32-s390.c has its own copy. */ | |
328 | ||
329 | static void | |
330 | elf_s390_info_to_howto (abfd, cache_ptr, dst) | |
331 | bfd *abfd ATTRIBUTE_UNUSED; | |
332 | arelent *cache_ptr; | |
333 | Elf_Internal_Rela *dst; | |
334 | { | |
335 | switch (ELF32_R_TYPE(dst->r_info)) | |
336 | { | |
337 | case R_390_GNU_VTINHERIT: | |
338 | cache_ptr->howto = &elf32_s390_vtinherit_howto; | |
339 | break; | |
340 | ||
341 | case R_390_GNU_VTENTRY: | |
342 | cache_ptr->howto = &elf32_s390_vtentry_howto; | |
343 | break; | |
344 | ||
345 | default: | |
346 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max); | |
347 | cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)]; | |
dc810e39 | 348 | } |
a85d7ed0 NC |
349 | } |
350 | ||
69fc87f1 MS |
351 | /* A relocation function which doesn't do anything. */ |
352 | static bfd_reloc_status_type | |
353 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 354 | output_bfd, error_message) |
69fc87f1 MS |
355 | bfd *abfd ATTRIBUTE_UNUSED; |
356 | arelent *reloc_entry; | |
357 | asymbol *symbol ATTRIBUTE_UNUSED; | |
358 | PTR data ATTRIBUTE_UNUSED; | |
359 | asection *input_section; | |
360 | bfd *output_bfd; | |
361 | char **error_message ATTRIBUTE_UNUSED; | |
362 | { | |
363 | if (output_bfd) | |
364 | reloc_entry->address += input_section->output_offset; | |
365 | return bfd_reloc_ok; | |
366 | } | |
367 | ||
b34976b6 | 368 | static bfd_boolean |
a85d7ed0 NC |
369 | elf_s390_is_local_label_name (abfd, name) |
370 | bfd *abfd; | |
371 | const char *name; | |
372 | { | |
373 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 374 | return TRUE; |
a85d7ed0 NC |
375 | |
376 | return _bfd_elf_is_local_label_name (abfd, name); | |
377 | } | |
378 | ||
379 | /* Functions for the 390 ELF linker. */ | |
380 | ||
381 | /* The name of the dynamic interpreter. This is put in the .interp | |
382 | section. */ | |
383 | ||
384 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
385 | ||
a85d7ed0 NC |
386 | /* The size in bytes of the first entry in the procedure linkage table. */ |
387 | #define PLT_FIRST_ENTRY_SIZE 32 | |
388 | /* The size in bytes of an entry in the procedure linkage table. */ | |
dc810e39 | 389 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
390 | |
391 | #define GOT_ENTRY_SIZE 4 | |
392 | ||
393 | /* The first three entries in a procedure linkage table are reserved, | |
394 | and the initial contents are unimportant (we zero them out). | |
395 | Subsequent entries look like this. See the SVR4 ABI 386 | |
396 | supplement to see how this works. */ | |
397 | ||
398 | /* For the s390, simple addr offset can only be 0 - 4096. | |
399 | To use the full 2 GB address space, several instructions | |
400 | are needed to load an address in a register and execute | |
401 | a branch( or just saving the address) | |
402 | ||
dc810e39 | 403 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
404 | |
405 | /* The first 3 words in the GOT are then reserved. | |
406 | Word 0 is the address of the dynamic table. | |
407 | Word 1 is a pointer to a structure describing the object | |
408 | Word 2 is used to point to the loader entry address. | |
409 | ||
410 | The code for position independand PLT entries looks like this: | |
411 | ||
412 | r12 holds addr of the current GOT at entry to the PLT | |
413 | ||
414 | The GOT holds the address in the PLT to be executed. | |
415 | The loader then gets: | |
416 | 24(15) = Pointer to the structure describing the object. | |
dc810e39 | 417 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
418 | |
419 | The loader must then find the module where the function is | |
420 | and insert the address in the GOT. | |
421 | ||
422 | Note: 390 can only address +- 64 K relative. | |
423 | We check if offset > 65536, then make a relative branch -64xxx | |
424 | back to a previous defined branch | |
425 | ||
426 | PLT1: BASR 1,0 # 2 bytes | |
427 | L 1,22(1) # 4 bytes Load offset in GOT in r 1 | |
428 | L 1,(1,12) # 4 bytes Load address from GOT in r1 | |
429 | BCR 15,1 # 2 bytes Jump to address | |
430 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
431 | L 1,14(1) # 4 bytes Load offset in symol table in r1 | |
432 | BRC 15,-x # 4 bytes Jump to start of PLT | |
433 | .word 0 # 2 bytes filler | |
434 | .long ? # 4 bytes offset in GOT | |
435 | .long ? # 4 bytes offset into symbol table | |
436 | ||
437 | This was the general case. There are two additional, optimizes PLT | |
438 | definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. | |
439 | First the one for GOT offsets < 4096: | |
440 | ||
441 | PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 | |
442 | BCR 15,1 # 2 bytes Jump to address | |
443 | .word 0,0,0 # 6 bytes filler | |
444 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
445 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
446 | BRC 15,-x # 4 bytes Jump to start of PLT | |
447 | .word 0,0,0 # 6 bytes filler | |
448 | .long ? # 4 bytes offset into symbol table | |
449 | ||
450 | Second the one for GOT offsets < 32768: | |
451 | ||
452 | PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 | |
453 | L 1,(1,12) # 4 bytes Load address from GOT to r1 | |
454 | BCR 15,1 # 2 bytes Jump to address | |
455 | .word 0 # 2 bytes filler | |
456 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
457 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
458 | BRC 15,-x # 4 bytes Jump to start of PLT | |
459 | .word 0,0,0 # 6 bytes filler | |
460 | .long ? # 4 bytes offset into symbol table | |
461 | ||
462 | Total = 32 bytes per PLT entry | |
463 | ||
464 | The code for static build PLT entries looks like this: | |
465 | ||
466 | PLT1: BASR 1,0 # 2 bytes | |
467 | L 1,22(1) # 4 bytes Load address of GOT entry | |
468 | L 1,0(0,1) # 4 bytes Load address from GOT in r1 | |
469 | BCR 15,1 # 2 bytes Jump to address | |
470 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
471 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
472 | BRC 15,-x # 4 bytes Jump to start of PLT | |
473 | .word 0 # 2 bytes filler | |
474 | .long ? # 4 bytes address of GOT entry | |
475 | .long ? # 4 bytes offset into symbol table */ | |
476 | ||
477 | #define PLT_PIC_ENTRY_WORD0 0x0d105810 | |
478 | #define PLT_PIC_ENTRY_WORD1 0x10165811 | |
479 | #define PLT_PIC_ENTRY_WORD2 0xc00007f1 | |
480 | #define PLT_PIC_ENTRY_WORD3 0x0d105810 | |
481 | #define PLT_PIC_ENTRY_WORD4 0x100ea7f4 | |
482 | ||
483 | #define PLT_PIC12_ENTRY_WORD0 0x5810c000 | |
484 | #define PLT_PIC12_ENTRY_WORD1 0x07f10000 | |
485 | #define PLT_PIC12_ENTRY_WORD2 0x00000000 | |
486 | #define PLT_PIC12_ENTRY_WORD3 0x0d105810 | |
487 | #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4 | |
488 | ||
489 | #define PLT_PIC16_ENTRY_WORD0 0xa7180000 | |
490 | #define PLT_PIC16_ENTRY_WORD1 0x5811c000 | |
491 | #define PLT_PIC16_ENTRY_WORD2 0x07f10000 | |
492 | #define PLT_PIC16_ENTRY_WORD3 0x0d105810 | |
493 | #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4 | |
494 | ||
495 | #define PLT_ENTRY_WORD0 0x0d105810 | |
496 | #define PLT_ENTRY_WORD1 0x10165810 | |
497 | #define PLT_ENTRY_WORD2 0x100007f1 | |
498 | #define PLT_ENTRY_WORD3 0x0d105810 | |
499 | #define PLT_ENTRY_WORD4 0x100ea7f4 | |
500 | ||
501 | /* The first PLT entry pushes the offset into the symbol table | |
502 | from R1 onto the stack at 8(15) and the loader object info | |
503 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
504 | ||
505 | /* The first entry in the PLT for PIC code: | |
506 | ||
507 | PLT0: | |
508 | ST 1,28(15) # R1 has offset into symbol table | |
509 | L 1,4(12) # Get loader ino(object struct address) | |
dc810e39 | 510 | ST 1,24(15) # Store address |
a85d7ed0 NC |
511 | L 1,8(12) # Entry address of loader in R1 |
512 | BR 1 # Jump to loader | |
513 | ||
514 | The first entry in the PLT for static code: | |
515 | ||
516 | PLT0: | |
517 | ST 1,28(15) # R1 has offset into symbol table | |
518 | BASR 1,0 | |
519 | L 1,18(0,1) # Get address of GOT | |
520 | MVC 24(4,15),4(1) # Move loader ino to stack | |
521 | L 1,8(1) # Get address of loader | |
522 | BR 1 # Jump to loader | |
523 | .word 0 # filler | |
524 | .long got # address of GOT */ | |
525 | ||
526 | #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c | |
527 | #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004 | |
528 | #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018 | |
529 | #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008 | |
530 | #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000 | |
531 | ||
532 | #define PLT_FIRST_ENTRY_WORD0 0x5010f01c | |
533 | #define PLT_FIRST_ENTRY_WORD1 0x0d105810 | |
534 | #define PLT_FIRST_ENTRY_WORD2 0x1012D203 | |
535 | #define PLT_FIRST_ENTRY_WORD3 0xf0181004 | |
536 | #define PLT_FIRST_ENTRY_WORD4 0x58101008 | |
537 | #define PLT_FIRST_ENTRY_WORD5 0x07f10000 | |
538 | ||
539 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
540 | decides to copy as dynamic relocs in check_relocs for each symbol. |
541 | This is so that it can later discard them if they are found to be | |
542 | unnecessary. We store the information in a field extending the | |
543 | regular ELF linker hash table. */ | |
a85d7ed0 | 544 | |
0451c93c | 545 | struct elf_s390_dyn_relocs |
a85d7ed0 | 546 | { |
0451c93c MS |
547 | struct elf_s390_dyn_relocs *next; |
548 | ||
549 | /* The input section of the reloc. */ | |
550 | asection *sec; | |
551 | ||
552 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 553 | bfd_size_type count; |
0451c93c MS |
554 | |
555 | /* Number of pc-relative relocs copied for the input section. */ | |
556 | bfd_size_type pc_count; | |
a85d7ed0 NC |
557 | }; |
558 | ||
559 | /* s390 ELF linker hash entry. */ | |
560 | ||
561 | struct elf_s390_link_hash_entry | |
562 | { | |
0451c93c | 563 | struct elf_link_hash_entry elf; |
a85d7ed0 | 564 | |
0451c93c MS |
565 | /* Track dynamic relocs copied for this symbol. */ |
566 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
567 | |
568 | /* Number of GOTPLT references for a function. */ | |
569 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
570 | |
571 | #define GOT_UNKNOWN 0 | |
572 | #define GOT_NORMAL 1 | |
573 | #define GOT_TLS_GD 2 | |
574 | #define GOT_TLS_IE 3 | |
575 | #define GOT_TLS_IE_NLT 4 | |
576 | unsigned char tls_type; | |
a85d7ed0 NC |
577 | }; |
578 | ||
69fc87f1 MS |
579 | #define elf_s390_hash_entry(ent) \ |
580 | ((struct elf_s390_link_hash_entry *)(ent)) | |
581 | ||
582 | struct elf_s390_obj_tdata | |
583 | { | |
584 | struct elf_obj_tdata root; | |
585 | ||
586 | /* tls_type for each local got entry. */ | |
587 | char *local_got_tls_type; | |
588 | }; | |
589 | ||
590 | #define elf_s390_tdata(abfd) \ | |
591 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
592 | ||
593 | #define elf_s390_local_got_tls_type(abfd) \ | |
594 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
595 | ||
596 | static bfd_boolean | |
597 | elf_s390_mkobject (abfd) | |
598 | bfd *abfd; | |
599 | { | |
600 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
601 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
602 | if (abfd->tdata.any == NULL) | |
603 | return FALSE; | |
604 | return TRUE; | |
605 | } | |
606 | ||
607 | static bfd_boolean | |
608 | elf_s390_object_p (abfd) | |
609 | bfd *abfd; | |
610 | { | |
611 | /* Allocate our special target data. */ | |
612 | struct elf_s390_obj_tdata *new_tdata; | |
613 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
614 | new_tdata = bfd_zalloc (abfd, amt); | |
615 | if (new_tdata == NULL) | |
616 | return FALSE; | |
617 | new_tdata->root = *abfd->tdata.elf_obj_data; | |
618 | abfd->tdata.any = new_tdata; | |
619 | /* Set the right machine number for an s390 elf32 file. */ | |
620 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); | |
621 | } | |
622 | ||
a85d7ed0 NC |
623 | /* s390 ELF linker hash table. */ |
624 | ||
625 | struct elf_s390_link_hash_table | |
626 | { | |
0451c93c | 627 | struct elf_link_hash_table elf; |
a85d7ed0 | 628 | |
0451c93c MS |
629 | /* Short-cuts to get to dynamic linker sections. */ |
630 | asection *sgot; | |
631 | asection *sgotplt; | |
632 | asection *srelgot; | |
633 | asection *splt; | |
634 | asection *srelplt; | |
635 | asection *sdynbss; | |
636 | asection *srelbss; | |
ec338859 | 637 | |
69fc87f1 MS |
638 | union { |
639 | bfd_signed_vma refcount; | |
640 | bfd_vma offset; | |
641 | } tls_ldm_got; | |
642 | ||
ec338859 AM |
643 | /* Small local sym to section mapping cache. */ |
644 | struct sym_sec_cache sym_sec; | |
0451c93c | 645 | }; |
a85d7ed0 NC |
646 | |
647 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
648 | ||
649 | #define elf_s390_hash_table(p) \ | |
650 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
651 | ||
652 | /* Create an entry in an s390 ELF linker hash table. */ | |
653 | ||
654 | static struct bfd_hash_entry * | |
0451c93c | 655 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
656 | struct bfd_hash_entry *entry; |
657 | struct bfd_hash_table *table; | |
658 | const char *string; | |
659 | { | |
a85d7ed0 NC |
660 | /* Allocate the structure if it has not already been allocated by a |
661 | subclass. */ | |
0451c93c MS |
662 | if (entry == NULL) |
663 | { | |
664 | entry = bfd_hash_allocate (table, | |
665 | sizeof (struct elf_s390_link_hash_entry)); | |
666 | if (entry == NULL) | |
667 | return entry; | |
668 | } | |
ec338859 | 669 | |
a85d7ed0 | 670 | /* Call the allocation method of the superclass. */ |
0451c93c MS |
671 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
672 | if (entry != NULL) | |
a85d7ed0 | 673 | { |
0451c93c | 674 | struct elf_s390_link_hash_entry *eh; |
ec338859 | 675 | |
0451c93c MS |
676 | eh = (struct elf_s390_link_hash_entry *) entry; |
677 | eh->dyn_relocs = NULL; | |
5236c819 | 678 | eh->gotplt_refcount = 0; |
69fc87f1 | 679 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
680 | } |
681 | ||
0451c93c | 682 | return entry; |
a85d7ed0 NC |
683 | } |
684 | ||
685 | /* Create an s390 ELF linker hash table. */ | |
686 | ||
687 | static struct bfd_link_hash_table * | |
688 | elf_s390_link_hash_table_create (abfd) | |
689 | bfd *abfd; | |
690 | { | |
691 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 692 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 693 | |
e2d34d7d | 694 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 695 | if (ret == NULL) |
a85d7ed0 NC |
696 | return NULL; |
697 | ||
0451c93c | 698 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
a85d7ed0 | 699 | { |
e2d34d7d | 700 | free (ret); |
a85d7ed0 NC |
701 | return NULL; |
702 | } | |
703 | ||
0451c93c MS |
704 | ret->sgot = NULL; |
705 | ret->sgotplt = NULL; | |
706 | ret->srelgot = NULL; | |
707 | ret->splt = NULL; | |
708 | ret->srelplt = NULL; | |
709 | ret->sdynbss = NULL; | |
710 | ret->srelbss = NULL; | |
69fc87f1 | 711 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 712 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
713 | |
714 | return &ret->elf.root; | |
715 | } | |
716 | ||
717 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
718 | shortcuts to them in our hash table. */ | |
719 | ||
b34976b6 | 720 | static bfd_boolean |
0451c93c MS |
721 | create_got_section (dynobj, info) |
722 | bfd *dynobj; | |
723 | struct bfd_link_info *info; | |
724 | { | |
725 | struct elf_s390_link_hash_table *htab; | |
726 | ||
727 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 728 | return FALSE; |
0451c93c MS |
729 | |
730 | htab = elf_s390_hash_table (info); | |
731 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
732 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
733 | if (!htab->sgot || !htab->sgotplt) | |
734 | abort (); | |
735 | ||
736 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
737 | if (htab->srelgot == NULL | |
738 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
739 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
740 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
741 | | SEC_READONLY)) | |
742 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
b34976b6 AM |
743 | return FALSE; |
744 | return TRUE; | |
0451c93c MS |
745 | } |
746 | ||
747 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
748 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
749 | hash table. */ | |
750 | ||
b34976b6 | 751 | static bfd_boolean |
0451c93c MS |
752 | elf_s390_create_dynamic_sections (dynobj, info) |
753 | bfd *dynobj; | |
754 | struct bfd_link_info *info; | |
755 | { | |
756 | struct elf_s390_link_hash_table *htab; | |
757 | ||
758 | htab = elf_s390_hash_table (info); | |
759 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 760 | return FALSE; |
0451c93c MS |
761 | |
762 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 763 | return FALSE; |
0451c93c MS |
764 | |
765 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
766 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
767 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
768 | if (!info->shared) | |
769 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
770 | ||
771 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
772 | || (!info->shared && !htab->srelbss)) | |
773 | abort (); | |
774 | ||
b34976b6 | 775 | return TRUE; |
a85d7ed0 NC |
776 | } |
777 | ||
0451c93c MS |
778 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
779 | ||
780 | static void | |
b48fa14c AM |
781 | elf_s390_copy_indirect_symbol (bed, dir, ind) |
782 | struct elf_backend_data *bed; | |
0451c93c MS |
783 | struct elf_link_hash_entry *dir, *ind; |
784 | { | |
785 | struct elf_s390_link_hash_entry *edir, *eind; | |
786 | ||
787 | edir = (struct elf_s390_link_hash_entry *) dir; | |
788 | eind = (struct elf_s390_link_hash_entry *) ind; | |
789 | ||
790 | if (eind->dyn_relocs != NULL) | |
791 | { | |
792 | if (edir->dyn_relocs != NULL) | |
793 | { | |
794 | struct elf_s390_dyn_relocs **pp; | |
795 | struct elf_s390_dyn_relocs *p; | |
796 | ||
797 | if (ind->root.type == bfd_link_hash_indirect) | |
798 | abort (); | |
799 | ||
800 | /* Add reloc counts against the weak sym to the strong sym | |
801 | list. Merge any entries against the same section. */ | |
802 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
803 | { | |
804 | struct elf_s390_dyn_relocs *q; | |
805 | ||
806 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
807 | if (q->sec == p->sec) | |
808 | { | |
809 | q->pc_count += p->pc_count; | |
810 | q->count += p->count; | |
811 | *pp = p->next; | |
812 | break; | |
813 | } | |
814 | if (q == NULL) | |
815 | pp = &p->next; | |
816 | } | |
817 | *pp = edir->dyn_relocs; | |
818 | } | |
819 | ||
820 | edir->dyn_relocs = eind->dyn_relocs; | |
821 | eind->dyn_relocs = NULL; | |
822 | } | |
823 | ||
69fc87f1 MS |
824 | if (ind->root.type == bfd_link_hash_indirect |
825 | && dir->got.refcount <= 0) | |
826 | { | |
827 | edir->tls_type = eind->tls_type; | |
828 | eind->tls_type = GOT_UNKNOWN; | |
829 | } | |
830 | ||
b48fa14c | 831 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
0451c93c | 832 | } |
a85d7ed0 | 833 | |
69fc87f1 MS |
834 | static int |
835 | elf_s390_tls_transition (info, r_type, is_local) | |
836 | struct bfd_link_info *info; | |
837 | int r_type; | |
838 | int is_local; | |
839 | { | |
840 | if (info->shared) | |
841 | return r_type; | |
842 | ||
843 | switch (r_type) | |
844 | { | |
845 | case R_390_TLS_GD32: | |
846 | case R_390_TLS_IE32: | |
847 | if (is_local) | |
848 | return R_390_TLS_LE32; | |
849 | return R_390_TLS_IE32; | |
850 | case R_390_TLS_GOTIE32: | |
851 | if (is_local) | |
852 | return R_390_TLS_LE32; | |
853 | return R_390_TLS_GOTIE32; | |
854 | case R_390_TLS_LDM32: | |
855 | return R_390_TLS_LE32; | |
856 | } | |
857 | ||
858 | return r_type; | |
859 | } | |
860 | ||
a85d7ed0 NC |
861 | /* Look through the relocs for a section during the first phase, and |
862 | allocate space in the global offset table or procedure linkage | |
863 | table. */ | |
864 | ||
b34976b6 | 865 | static bfd_boolean |
a85d7ed0 NC |
866 | elf_s390_check_relocs (abfd, info, sec, relocs) |
867 | bfd *abfd; | |
868 | struct bfd_link_info *info; | |
869 | asection *sec; | |
870 | const Elf_Internal_Rela *relocs; | |
871 | { | |
0451c93c | 872 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
873 | Elf_Internal_Shdr *symtab_hdr; |
874 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
875 | const Elf_Internal_Rela *rel; |
876 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 877 | asection *sreloc; |
5236c819 | 878 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 879 | int tls_type, old_tls_type; |
a85d7ed0 NC |
880 | |
881 | if (info->relocateable) | |
b34976b6 | 882 | return TRUE; |
a85d7ed0 | 883 | |
0451c93c | 884 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
885 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
886 | sym_hashes = elf_sym_hashes (abfd); | |
5236c819 | 887 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 888 | |
a85d7ed0 NC |
889 | sreloc = NULL; |
890 | ||
891 | rel_end = relocs + sec->reloc_count; | |
892 | for (rel = relocs; rel < rel_end; rel++) | |
893 | { | |
69fc87f1 | 894 | unsigned int r_type; |
a85d7ed0 NC |
895 | unsigned long r_symndx; |
896 | struct elf_link_hash_entry *h; | |
897 | ||
898 | r_symndx = ELF32_R_SYM (rel->r_info); | |
899 | ||
0451c93c MS |
900 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
901 | { | |
902 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
903 | bfd_archive_filename (abfd), | |
904 | r_symndx); | |
b34976b6 | 905 | return FALSE; |
0451c93c MS |
906 | } |
907 | ||
a85d7ed0 NC |
908 | if (r_symndx < symtab_hdr->sh_info) |
909 | h = NULL; | |
910 | else | |
dc810e39 | 911 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
a85d7ed0 | 912 | |
5236c819 MS |
913 | /* Create got section and local_got_refcounts array if they |
914 | are needed. */ | |
69fc87f1 MS |
915 | r_type = elf_s390_tls_transition (info, |
916 | ELF32_R_TYPE (rel->r_info), | |
917 | h == NULL); | |
918 | switch (r_type) | |
a85d7ed0 NC |
919 | { |
920 | case R_390_GOT12: | |
5236c819 | 921 | case R_390_GOT16: |
a85d7ed0 | 922 | case R_390_GOT32: |
befc3abb | 923 | case R_390_GOTENT: |
5236c819 MS |
924 | case R_390_GOTPLT12: |
925 | case R_390_GOTPLT16: | |
926 | case R_390_GOTPLT32: | |
927 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
928 | case R_390_TLS_GD32: |
929 | case R_390_TLS_GOTIE12: | |
930 | case R_390_TLS_GOTIE32: | |
931 | case R_390_TLS_IEENT: | |
932 | case R_390_TLS_IE32: | |
933 | case R_390_TLS_LDM32: | |
5236c819 MS |
934 | if (h == NULL |
935 | && local_got_refcounts == NULL) | |
a85d7ed0 | 936 | { |
5236c819 | 937 | bfd_size_type size; |
26e41594 | 938 | |
5236c819 | 939 | size = symtab_hdr->sh_info; |
69fc87f1 | 940 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
941 | local_got_refcounts = ((bfd_signed_vma *) |
942 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 943 | if (local_got_refcounts == NULL) |
5236c819 MS |
944 | return FALSE; |
945 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
946 | elf_s390_local_got_tls_type (abfd) |
947 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 948 | } |
5236c819 MS |
949 | /* Fall through. */ |
950 | case R_390_GOTOFF16: | |
951 | case R_390_GOTOFF32: | |
0451c93c | 952 | case R_390_GOTPC: |
befc3abb | 953 | case R_390_GOTPCDBL: |
0451c93c MS |
954 | if (htab->sgot == NULL) |
955 | { | |
956 | if (htab->elf.dynobj == NULL) | |
957 | htab->elf.dynobj = abfd; | |
958 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 959 | return FALSE; |
0451c93c | 960 | } |
5236c819 MS |
961 | } |
962 | ||
69fc87f1 | 963 | switch (r_type) |
5236c819 | 964 | { |
5236c819 MS |
965 | case R_390_GOTOFF16: |
966 | case R_390_GOTOFF32: | |
967 | case R_390_GOTPC: | |
968 | case R_390_GOTPCDBL: | |
969 | /* Got is created, nothing to be done. */ | |
a85d7ed0 NC |
970 | break; |
971 | ||
26e41594 AM |
972 | case R_390_PLT16DBL: |
973 | case R_390_PLT32DBL: | |
a85d7ed0 | 974 | case R_390_PLT32: |
5236c819 MS |
975 | case R_390_PLTOFF16: |
976 | case R_390_PLTOFF32: | |
a85d7ed0 | 977 | /* This symbol requires a procedure linkage table entry. We |
26e41594 AM |
978 | actually build the entry in adjust_dynamic_symbol, |
979 | because this might be a case of linking PIC code which is | |
980 | never referenced by a dynamic object, in which case we | |
981 | don't need to generate a procedure linkage table entry | |
982 | after all. */ | |
a85d7ed0 NC |
983 | |
984 | /* If this is a local symbol, we resolve it directly without | |
26e41594 | 985 | creating a procedure linkage table entry. */ |
5236c819 MS |
986 | if (h != NULL) |
987 | { | |
988 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
989 | h->plt.refcount += 1; | |
990 | } | |
991 | break; | |
a85d7ed0 | 992 | |
5236c819 MS |
993 | case R_390_GOTPLT12: |
994 | case R_390_GOTPLT16: | |
995 | case R_390_GOTPLT32: | |
996 | case R_390_GOTPLTENT: | |
997 | /* This symbol requires either a procedure linkage table entry | |
998 | or an entry in the local got. We actually build the entry | |
999 | in adjust_dynamic_symbol because whether this is really a | |
1000 | global reference can change and with it the fact if we have | |
1001 | to create a plt entry or a local got entry. To be able to | |
1002 | make a once global symbol a local one we have to keep track | |
1003 | of the number of gotplt references that exist for this | |
1004 | symbol. */ | |
1005 | if (h != NULL) | |
1006 | { | |
1007 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
1008 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1009 | h->plt.refcount += 1; | |
1010 | } | |
1011 | else | |
1012 | local_got_refcounts[r_symndx] += 1; | |
a85d7ed0 NC |
1013 | break; |
1014 | ||
69fc87f1 MS |
1015 | case R_390_TLS_LDM32: |
1016 | htab->tls_ldm_got.refcount += 1; | |
1017 | break; | |
1018 | ||
1019 | case R_390_TLS_IE32: | |
1020 | case R_390_TLS_GOTIE12: | |
1021 | case R_390_TLS_GOTIE32: | |
1022 | case R_390_TLS_IEENT: | |
1023 | if (info->shared) | |
1024 | info->flags |= DF_STATIC_TLS; | |
ae9a127f | 1025 | /* Fall through. */ |
69fc87f1 MS |
1026 | |
1027 | case R_390_GOT12: | |
26e41594 | 1028 | case R_390_GOT16: |
69fc87f1 MS |
1029 | case R_390_GOT32: |
1030 | case R_390_GOTENT: | |
1031 | case R_390_TLS_GD32: | |
1032 | /* This symbol requires a global offset table entry. */ | |
1033 | switch (r_type) | |
1034 | { | |
1035 | default: | |
1036 | case R_390_GOT12: | |
1037 | case R_390_GOT16: | |
1038 | case R_390_GOT32: | |
1039 | case R_390_GOTENT: | |
1040 | tls_type = GOT_NORMAL; | |
1041 | break; | |
1042 | case R_390_TLS_GD32: | |
1043 | tls_type = GOT_TLS_GD; | |
1044 | break; | |
1045 | case R_390_TLS_IE32: | |
1046 | case R_390_TLS_GOTIE32: | |
1047 | tls_type = GOT_TLS_IE; | |
1048 | break; | |
1049 | case R_390_TLS_GOTIE12: | |
1050 | case R_390_TLS_IEENT: | |
1051 | tls_type = GOT_TLS_IE_NLT; | |
1052 | break; | |
1053 | } | |
1054 | ||
1055 | if (h != NULL) | |
1056 | { | |
1057 | h->got.refcount += 1; | |
1058 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1059 | } | |
1060 | else | |
1061 | { | |
1062 | local_got_refcounts[r_symndx] += 1; | |
1063 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; | |
1064 | } | |
1065 | /* If a TLS symbol is accessed using IE at least once, | |
1066 | there is no point to use dynamic model for it. */ | |
1067 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1068 | { | |
1069 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1070 | { | |
1071 | (*_bfd_error_handler) | |
1072 | (_("%s: `%s' accessed both as normal and thread local symbol"), | |
1073 | bfd_archive_filename (abfd), h->root.root.string); | |
1074 | return FALSE; | |
1075 | } | |
1076 | if (old_tls_type > tls_type) | |
1077 | tls_type = old_tls_type; | |
1078 | } | |
1079 | ||
1080 | if (old_tls_type != tls_type) | |
1081 | { | |
1082 | if (h != NULL) | |
1083 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1084 | else | |
1085 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1086 | } | |
1087 | ||
1088 | if (r_type != R_390_TLS_IE32) | |
1089 | break; | |
ae9a127f | 1090 | /* Fall through. */ |
69fc87f1 MS |
1091 | |
1092 | case R_390_TLS_LE32: | |
1093 | if (!info->shared) | |
1094 | break; | |
1095 | info->flags |= DF_STATIC_TLS; | |
ae9a127f | 1096 | /* Fall through. */ |
69fc87f1 | 1097 | |
26e41594 AM |
1098 | case R_390_8: |
1099 | case R_390_16: | |
a85d7ed0 | 1100 | case R_390_32: |
26e41594 AM |
1101 | case R_390_PC16: |
1102 | case R_390_PC16DBL: | |
befc3abb | 1103 | case R_390_PC32DBL: |
a85d7ed0 | 1104 | case R_390_PC32: |
0451c93c MS |
1105 | if (h != NULL && !info->shared) |
1106 | { | |
1107 | /* If this reloc is in a read-only section, we might | |
1108 | need a copy reloc. We can't check reliably at this | |
1109 | stage whether the section is read-only, as input | |
1110 | sections have not yet been mapped to output sections. | |
1111 | Tentatively set the flag for now, and correct in | |
1112 | adjust_dynamic_symbol. */ | |
1113 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
ec338859 | 1114 | |
0451c93c MS |
1115 | /* We may need a .plt entry if the function this reloc |
1116 | refers to is in a shared lib. */ | |
1117 | h->plt.refcount += 1; | |
1118 | } | |
a85d7ed0 NC |
1119 | |
1120 | /* If we are creating a shared library, and this is a reloc | |
0451c93c MS |
1121 | against a global symbol, or a non PC relative reloc |
1122 | against a local symbol, then we need to copy the reloc | |
1123 | into the shared library. However, if we are linking with | |
1124 | -Bsymbolic, we do not need to copy a reloc against a | |
1125 | global symbol which is defined in an object we are | |
1126 | including in the link (i.e., DEF_REGULAR is set). At | |
1127 | this point we have not seen all the input files, so it is | |
1128 | possible that DEF_REGULAR is not set now but will be set | |
1129 | later (it is never cleared). In case of a weak definition, | |
1130 | DEF_REGULAR may be cleared later by a strong definition in | |
1131 | a shared library. We account for that possibility below by | |
1132 | storing information in the relocs_copied field of the hash | |
1133 | table entry. A similar situation occurs when creating | |
1134 | shared libraries and symbol visibility changes render the | |
1135 | symbol local. | |
1136 | ||
1137 | If on the other hand, we are creating an executable, we | |
1138 | may need to keep relocations for symbols satisfied by a | |
1139 | dynamic library if we manage to avoid copy relocs for the | |
1140 | symbol. */ | |
1141 | if ((info->shared | |
1142 | && (sec->flags & SEC_ALLOC) != 0 | |
ec338859 | 1143 | && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 |
0451c93c | 1144 | && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL |
befc3abb | 1145 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL |
0451c93c MS |
1146 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32) |
1147 | || (h != NULL | |
1148 | && (! info->symbolic | |
1149 | || h->root.type == bfd_link_hash_defweak | |
1150 | || (h->elf_link_hash_flags | |
1151 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
1152 | || (!info->shared | |
1153 | && (sec->flags & SEC_ALLOC) != 0 | |
1154 | && h != NULL | |
1155 | && (h->root.type == bfd_link_hash_defweak | |
1156 | || (h->elf_link_hash_flags | |
1157 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
a85d7ed0 | 1158 | { |
ec338859 AM |
1159 | struct elf_s390_dyn_relocs *p; |
1160 | struct elf_s390_dyn_relocs **head; | |
1161 | ||
0451c93c MS |
1162 | /* We must copy these reloc types into the output file. |
1163 | Create a reloc section in dynobj and make room for | |
1164 | this reloc. */ | |
a85d7ed0 NC |
1165 | if (sreloc == NULL) |
1166 | { | |
1167 | const char *name; | |
0451c93c | 1168 | bfd *dynobj; |
ec338859 | 1169 | |
a85d7ed0 NC |
1170 | name = (bfd_elf_string_from_elf_section |
1171 | (abfd, | |
1172 | elf_elfheader (abfd)->e_shstrndx, | |
1173 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1174 | if (name == NULL) | |
b34976b6 | 1175 | return FALSE; |
a85d7ed0 | 1176 | |
0451c93c MS |
1177 | if (strncmp (name, ".rela", 5) != 0 |
1178 | || strcmp (bfd_get_section_name (abfd, sec), | |
1179 | name + 5) != 0) | |
1180 | { | |
1181 | (*_bfd_error_handler) | |
1182 | (_("%s: bad relocation section name `%s\'"), | |
1183 | bfd_archive_filename (abfd), name); | |
1184 | } | |
1185 | ||
1186 | if (htab->elf.dynobj == NULL) | |
1187 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1188 | |
0451c93c | 1189 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
1190 | sreloc = bfd_get_section_by_name (dynobj, name); |
1191 | if (sreloc == NULL) | |
1192 | { | |
1193 | flagword flags; | |
1194 | ||
1195 | sreloc = bfd_make_section (dynobj, name); | |
1196 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1197 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1198 | if ((sec->flags & SEC_ALLOC) != 0) | |
1199 | flags |= SEC_ALLOC | SEC_LOAD; | |
1200 | if (sreloc == NULL | |
1201 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
1202 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
b34976b6 | 1203 | return FALSE; |
a85d7ed0 | 1204 | } |
0451c93c | 1205 | elf_section_data (sec)->sreloc = sreloc; |
a85d7ed0 NC |
1206 | } |
1207 | ||
0451c93c MS |
1208 | /* If this is a global symbol, we count the number of |
1209 | relocations we need for this symbol. */ | |
1210 | if (h != NULL) | |
a85d7ed0 | 1211 | { |
ec338859 | 1212 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1213 | } |
1214 | else | |
1215 | { | |
ec338859 AM |
1216 | /* Track dynamic relocs needed for local syms too. |
1217 | We really need local syms available to do this | |
1218 | easily. Oh well. */ | |
ec338859 | 1219 | asection *s; |
ae9a127f | 1220 | |
ec338859 AM |
1221 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
1222 | sec, r_symndx); | |
1223 | if (s == NULL) | |
b34976b6 | 1224 | return FALSE; |
ec338859 AM |
1225 | |
1226 | head = ((struct elf_s390_dyn_relocs **) | |
1227 | &elf_section_data (s)->local_dynrel); | |
1228 | } | |
1229 | ||
1230 | p = *head; | |
1231 | if (p == NULL || p->sec != sec) | |
1232 | { | |
1233 | bfd_size_type amt = sizeof *p; | |
ae9a127f | 1234 | |
ec338859 AM |
1235 | p = ((struct elf_s390_dyn_relocs *) |
1236 | bfd_alloc (htab->elf.dynobj, amt)); | |
1237 | if (p == NULL) | |
b34976b6 | 1238 | return FALSE; |
ec338859 AM |
1239 | p->next = *head; |
1240 | *head = p; | |
1241 | p->sec = sec; | |
1242 | p->count = 0; | |
1243 | p->pc_count = 0; | |
a85d7ed0 | 1244 | } |
ec338859 AM |
1245 | |
1246 | p->count += 1; | |
1247 | if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 | |
1248 | || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL | |
befc3abb | 1249 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL |
ec338859 AM |
1250 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32) |
1251 | p->pc_count += 1; | |
a85d7ed0 | 1252 | } |
a85d7ed0 | 1253 | break; |
ec338859 | 1254 | |
a85d7ed0 NC |
1255 | /* This relocation describes the C++ object vtable hierarchy. |
1256 | Reconstruct it for later use during GC. */ | |
26e41594 AM |
1257 | case R_390_GNU_VTINHERIT: |
1258 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1259 | return FALSE; | |
1260 | break; | |
ec338859 | 1261 | |
a85d7ed0 NC |
1262 | /* This relocation describes which C++ vtable entries are actually |
1263 | used. Record for later use during GC. */ | |
26e41594 AM |
1264 | case R_390_GNU_VTENTRY: |
1265 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1266 | return FALSE; | |
1267 | break; | |
ec338859 | 1268 | |
a85d7ed0 NC |
1269 | default: |
1270 | break; | |
1271 | } | |
1272 | } | |
1273 | ||
b34976b6 | 1274 | return TRUE; |
a85d7ed0 NC |
1275 | } |
1276 | ||
1277 | /* Return the section that should be marked against GC for a given | |
1278 | relocation. */ | |
1279 | ||
1280 | static asection * | |
1e2f5b6e AM |
1281 | elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
1282 | asection *sec; | |
a85d7ed0 NC |
1283 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1284 | Elf_Internal_Rela *rel; | |
1285 | struct elf_link_hash_entry *h; | |
1286 | Elf_Internal_Sym *sym; | |
1287 | { | |
1288 | if (h != NULL) | |
1289 | { | |
1290 | switch (ELF32_R_TYPE (rel->r_info)) | |
1291 | { | |
1292 | case R_390_GNU_VTINHERIT: | |
1293 | case R_390_GNU_VTENTRY: | |
1294 | break; | |
1295 | ||
1296 | default: | |
1297 | switch (h->root.type) | |
1298 | { | |
1299 | case bfd_link_hash_defined: | |
1300 | case bfd_link_hash_defweak: | |
1301 | return h->root.u.def.section; | |
1302 | ||
1303 | case bfd_link_hash_common: | |
1304 | return h->root.u.c.p->section; | |
1305 | ||
1306 | default: | |
1307 | break; | |
1308 | } | |
1309 | } | |
1310 | } | |
1311 | else | |
1e2f5b6e | 1312 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
a85d7ed0 NC |
1313 | |
1314 | return NULL; | |
1315 | } | |
1316 | ||
1317 | /* Update the got entry reference counts for the section being removed. */ | |
1318 | ||
b34976b6 | 1319 | static bfd_boolean |
a85d7ed0 | 1320 | elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
0451c93c MS |
1321 | bfd *abfd; |
1322 | struct bfd_link_info *info; | |
1323 | asection *sec; | |
1324 | const Elf_Internal_Rela *relocs; | |
a85d7ed0 NC |
1325 | { |
1326 | Elf_Internal_Shdr *symtab_hdr; | |
1327 | struct elf_link_hash_entry **sym_hashes; | |
1328 | bfd_signed_vma *local_got_refcounts; | |
1329 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1330 | |
ec338859 | 1331 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1332 | |
0451c93c MS |
1333 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1334 | sym_hashes = elf_sym_hashes (abfd); | |
1335 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1336 | |
1337 | relend = relocs + sec->reloc_count; | |
1338 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1339 | { |
26e41594 AM |
1340 | unsigned long r_symndx; |
1341 | unsigned int r_type; | |
1342 | struct elf_link_hash_entry *h = NULL; | |
1343 | ||
5236c819 | 1344 | r_symndx = ELF32_R_SYM (rel->r_info); |
26e41594 AM |
1345 | if (r_symndx >= symtab_hdr->sh_info) |
1346 | { | |
1347 | struct elf_s390_link_hash_entry *eh; | |
1348 | struct elf_s390_dyn_relocs **pp; | |
1349 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1350 | |
26e41594 AM |
1351 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1352 | eh = (struct elf_s390_link_hash_entry *) h; | |
5236c819 | 1353 | |
26e41594 AM |
1354 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1355 | if (p->sec == sec) | |
1356 | { | |
1357 | /* Everything must go for SEC. */ | |
1358 | *pp = p->next; | |
1359 | break; | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | r_type = ELF32_R_TYPE (rel->r_info); | |
1364 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1365 | switch (r_type) |
5236c819 | 1366 | { |
69fc87f1 MS |
1367 | case R_390_TLS_LDM32: |
1368 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1369 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1370 | break; | |
1371 | ||
1372 | case R_390_TLS_GD32: | |
1373 | case R_390_TLS_IE32: | |
1374 | case R_390_TLS_GOTIE12: | |
1375 | case R_390_TLS_GOTIE32: | |
1376 | case R_390_TLS_IEENT: | |
5236c819 MS |
1377 | case R_390_GOT12: |
1378 | case R_390_GOT16: | |
1379 | case R_390_GOT32: | |
1380 | case R_390_GOTOFF16: | |
1381 | case R_390_GOTOFF32: | |
1382 | case R_390_GOTPC: | |
1383 | case R_390_GOTPCDBL: | |
1384 | case R_390_GOTENT: | |
1385 | if (h != NULL) | |
1386 | { | |
1387 | if (h->got.refcount > 0) | |
1388 | h->got.refcount -= 1; | |
1389 | } | |
1390 | else if (local_got_refcounts != NULL) | |
1391 | { | |
1392 | if (local_got_refcounts[r_symndx] > 0) | |
1393 | local_got_refcounts[r_symndx] -= 1; | |
1394 | } | |
26e41594 | 1395 | break; |
a85d7ed0 | 1396 | |
5236c819 MS |
1397 | case R_390_8: |
1398 | case R_390_12: | |
1399 | case R_390_16: | |
1400 | case R_390_32: | |
1401 | case R_390_PC16: | |
1402 | case R_390_PC16DBL: | |
1403 | case R_390_PC32DBL: | |
1404 | case R_390_PC32: | |
26e41594 AM |
1405 | if (info->shared) |
1406 | break; | |
1407 | /* Fall through. */ | |
1408 | ||
69fc87f1 MS |
1409 | case R_390_PLT16DBL: |
1410 | case R_390_PLT32DBL: | |
1411 | case R_390_PLT32: | |
1412 | case R_390_PLTOFF16: | |
1413 | case R_390_PLTOFF32: | |
1414 | if (h != NULL) | |
1415 | { | |
1416 | if (h->plt.refcount > 0) | |
1417 | h->plt.refcount -= 1; | |
1418 | } | |
1419 | break; | |
1420 | ||
1421 | case R_390_GOTPLT12: | |
1422 | case R_390_GOTPLT16: | |
1423 | case R_390_GOTPLT32: | |
1424 | case R_390_GOTPLTENT: | |
1425 | if (h != NULL) | |
1426 | { | |
1427 | if (h->plt.refcount > 0) | |
1428 | { | |
1429 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1430 | h->plt.refcount -= 1; | |
1431 | } | |
1432 | } | |
1433 | else if (local_got_refcounts != NULL) | |
1434 | { | |
1435 | if (local_got_refcounts[r_symndx] > 0) | |
1436 | local_got_refcounts[r_symndx] -= 1; | |
1437 | } | |
1438 | break; | |
1439 | ||
5236c819 MS |
1440 | default: |
1441 | break; | |
1442 | } | |
1443 | } | |
a85d7ed0 | 1444 | |
b34976b6 | 1445 | return TRUE; |
a85d7ed0 NC |
1446 | } |
1447 | ||
5236c819 MS |
1448 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1449 | entry but we found we will not create any. Called when we find we will | |
1450 | not have any PLT for this symbol, by for example | |
1451 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1452 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1453 | created (we're only linking static objects). */ | |
1454 | ||
1455 | static void | |
1456 | elf_s390_adjust_gotplt (h) | |
1457 | struct elf_s390_link_hash_entry *h; | |
1458 | { | |
1459 | if (h->elf.root.type == bfd_link_hash_warning) | |
1460 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1461 | ||
1462 | if (h->gotplt_refcount <= 0) | |
1463 | return; | |
1464 | ||
1465 | /* We simply add the number of gotplt references to the number | |
1466 | * of got references for this symbol. */ | |
1467 | h->elf.got.refcount += h->gotplt_refcount; | |
1468 | h->gotplt_refcount = -1; | |
1469 | } | |
1470 | ||
a85d7ed0 NC |
1471 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1472 | regular object. The current definition is in some section of the | |
1473 | dynamic object, but we're not including those sections. We have to | |
1474 | change the definition to something the rest of the link can | |
1475 | understand. */ | |
1476 | ||
b34976b6 | 1477 | static bfd_boolean |
a85d7ed0 NC |
1478 | elf_s390_adjust_dynamic_symbol (info, h) |
1479 | struct bfd_link_info *info; | |
1480 | struct elf_link_hash_entry *h; | |
1481 | { | |
0451c93c MS |
1482 | struct elf_s390_link_hash_table *htab; |
1483 | struct elf_s390_link_hash_entry * eh; | |
1484 | struct elf_s390_dyn_relocs *p; | |
a85d7ed0 NC |
1485 | asection *s; |
1486 | unsigned int power_of_two; | |
1487 | ||
a85d7ed0 NC |
1488 | /* If this is a function, put it in the procedure linkage table. We |
1489 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1490 | (although we could actually do it here). */ |
a85d7ed0 NC |
1491 | if (h->type == STT_FUNC |
1492 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1493 | { | |
0451c93c MS |
1494 | if (h->plt.refcount <= 0 |
1495 | || (! info->shared | |
1496 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
f9cd9119 MS |
1497 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
1498 | && h->root.type != bfd_link_hash_undefweak | |
1499 | && h->root.type != bfd_link_hash_undefined)) | |
a85d7ed0 NC |
1500 | { |
1501 | /* This case can occur if we saw a PLT32 reloc in an input | |
26e41594 AM |
1502 | file, but the symbol was never referred to by a dynamic |
1503 | object, or if all references were garbage collected. In | |
a85d7ed0 NC |
1504 | such a case, we don't actually need to build a procedure |
1505 | linkage table, and we can just do a PC32 reloc instead. */ | |
1506 | h->plt.offset = (bfd_vma) -1; | |
1507 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1508 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1509 | } |
1510 | ||
b34976b6 | 1511 | return TRUE; |
a85d7ed0 | 1512 | } |
bbd7ec4a | 1513 | else |
0451c93c MS |
1514 | /* It's possible that we incorrectly decided a .plt reloc was |
1515 | needed for an R_390_PC32 reloc to a non-function sym in | |
1516 | check_relocs. We can't decide accurately between function and | |
1517 | non-function syms in check-relocs; Objects loaded later in | |
1518 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1519 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1520 | |
1521 | /* If this is a weak symbol, and there is a real definition, the | |
1522 | processor independent code will have arranged for us to see the | |
1523 | real definition first, and we can just use the same value. */ | |
1524 | if (h->weakdef != NULL) | |
1525 | { | |
1526 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1527 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1528 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1529 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
b34976b6 | 1530 | return TRUE; |
a85d7ed0 NC |
1531 | } |
1532 | ||
1533 | /* This is a reference to a symbol defined by a dynamic object which | |
1534 | is not a function. */ | |
1535 | ||
1536 | /* If we are creating a shared library, we must presume that the | |
1537 | only references to the symbol are via the global offset table. | |
1538 | For such cases we need not do anything here; the relocations will | |
1539 | be handled correctly by relocate_section. */ | |
1540 | if (info->shared) | |
b34976b6 | 1541 | return TRUE; |
a85d7ed0 NC |
1542 | |
1543 | /* If there are no references to this symbol that do not use the | |
1544 | GOT, we don't need to generate a copy reloc. */ | |
1545 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
b34976b6 | 1546 | return TRUE; |
a85d7ed0 | 1547 | |
0451c93c MS |
1548 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1549 | if (info->nocopyreloc) | |
1550 | { | |
1551 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1552 | return TRUE; |
0451c93c MS |
1553 | } |
1554 | ||
1555 | eh = (struct elf_s390_link_hash_entry *) h; | |
1556 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1557 | { | |
1558 | s = p->sec->output_section; | |
1559 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1560 | break; | |
1561 | } | |
1562 | ||
1563 | /* If we didn't find any dynamic relocs in read-only sections, then | |
ec338859 | 1564 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
0451c93c MS |
1565 | if (p == NULL) |
1566 | { | |
1567 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1568 | return TRUE; |
0451c93c MS |
1569 | } |
1570 | ||
a85d7ed0 NC |
1571 | /* We must allocate the symbol in our .dynbss section, which will |
1572 | become part of the .bss section of the executable. There will be | |
1573 | an entry for this symbol in the .dynsym section. The dynamic | |
1574 | object will contain position independent code, so all references | |
1575 | from the dynamic object to this symbol will go through the global | |
1576 | offset table. The dynamic linker will use the .dynsym entry to | |
1577 | determine the address it must put in the global offset table, so | |
1578 | both the dynamic object and the regular object will refer to the | |
1579 | same memory location for the variable. */ | |
1580 | ||
0451c93c | 1581 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1582 | |
0451c93c MS |
1583 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1584 | copy the initial value out of the dynamic object and into the | |
1585 | runtime process image. */ | |
a85d7ed0 NC |
1586 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1587 | { | |
0451c93c | 1588 | htab->srelbss->_raw_size += sizeof (Elf32_External_Rela); |
a85d7ed0 NC |
1589 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1590 | } | |
1591 | ||
1592 | /* We need to figure out the alignment required for this symbol. I | |
1593 | have no idea how ELF linkers handle this. */ | |
1594 | power_of_two = bfd_log2 (h->size); | |
1595 | if (power_of_two > 3) | |
1596 | power_of_two = 3; | |
1597 | ||
1598 | /* Apply the required alignment. */ | |
0451c93c MS |
1599 | s = htab->sdynbss; |
1600 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
1601 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
a85d7ed0 | 1602 | { |
0451c93c | 1603 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1604 | return FALSE; |
a85d7ed0 NC |
1605 | } |
1606 | ||
1607 | /* Define the symbol as being at this point in the section. */ | |
1608 | h->root.u.def.section = s; | |
1609 | h->root.u.def.value = s->_raw_size; | |
1610 | ||
1611 | /* Increment the section size to make room for the symbol. */ | |
1612 | s->_raw_size += h->size; | |
1613 | ||
b34976b6 | 1614 | return TRUE; |
a85d7ed0 NC |
1615 | } |
1616 | ||
0451c93c MS |
1617 | /* This is the condition under which elf_s390_finish_dynamic_symbol |
1618 | will be called from elflink.h. If elflink.h doesn't call our | |
1619 | finish_dynamic_symbol routine, we'll need to do something about | |
1620 | initializing any .plt and .got entries in elf_s390_relocate_section. */ | |
1621 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ | |
1622 | ((DYN) \ | |
1623 | && ((INFO)->shared \ | |
1624 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
1625 | && ((H)->dynindx != -1 \ | |
1626 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1627 | ||
1628 | /* Allocate space in .plt, .got and associated reloc sections for | |
1629 | dynamic relocs. */ | |
1630 | ||
b34976b6 | 1631 | static bfd_boolean |
0451c93c MS |
1632 | allocate_dynrelocs (h, inf) |
1633 | struct elf_link_hash_entry *h; | |
1634 | PTR inf; | |
1635 | { | |
1636 | struct bfd_link_info *info; | |
1637 | struct elf_s390_link_hash_table *htab; | |
1638 | struct elf_s390_link_hash_entry *eh; | |
1639 | struct elf_s390_dyn_relocs *p; | |
1640 | ||
e92d460e | 1641 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1642 | return TRUE; |
0451c93c | 1643 | |
e92d460e | 1644 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1645 | /* When warning symbols are created, they **replace** the "real" |
1646 | entry in the hash table, thus we never get to see the real | |
1647 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1648 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1649 | ||
0451c93c MS |
1650 | info = (struct bfd_link_info *) inf; |
1651 | htab = elf_s390_hash_table (info); | |
1652 | ||
1653 | if (htab->elf.dynamic_sections_created | |
1654 | && h->plt.refcount > 0) | |
1655 | { | |
1656 | /* Make sure this symbol is output as a dynamic symbol. | |
1657 | Undefined weak syms won't yet be marked as dynamic. */ | |
1658 | if (h->dynindx == -1 | |
1659 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1660 | { | |
1661 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1662 | return FALSE; |
0451c93c MS |
1663 | } |
1664 | ||
1665 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) | |
1666 | { | |
1667 | asection *s = htab->splt; | |
1668 | ||
1669 | /* If this is the first .plt entry, make room for the special | |
1670 | first entry. */ | |
1671 | if (s->_raw_size == 0) | |
1672 | s->_raw_size += PLT_FIRST_ENTRY_SIZE; | |
1673 | ||
1674 | h->plt.offset = s->_raw_size; | |
1675 | ||
1676 | /* If this symbol is not defined in a regular file, and we are | |
1677 | not generating a shared library, then set the symbol to this | |
1678 | location in the .plt. This is required to make function | |
1679 | pointers compare as equal between the normal executable and | |
1680 | the shared library. */ | |
1681 | if (! info->shared | |
1682 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1683 | { | |
1684 | h->root.u.def.section = s; | |
1685 | h->root.u.def.value = h->plt.offset; | |
1686 | } | |
ec338859 | 1687 | |
0451c93c MS |
1688 | /* Make room for this entry. */ |
1689 | s->_raw_size += PLT_ENTRY_SIZE; | |
ec338859 | 1690 | |
0451c93c MS |
1691 | /* We also need to make an entry in the .got.plt section, which |
1692 | will be placed in the .got section by the linker script. */ | |
1693 | htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; | |
1694 | ||
1695 | /* We also need to make an entry in the .rela.plt section. */ | |
1696 | htab->srelplt->_raw_size += sizeof (Elf32_External_Rela); | |
1697 | } | |
1698 | else | |
1699 | { | |
1700 | h->plt.offset = (bfd_vma) -1; | |
1701 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1702 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c | 1703 | } |
ec338859 | 1704 | } |
0451c93c MS |
1705 | else |
1706 | { | |
1707 | h->plt.offset = (bfd_vma) -1; | |
1708 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1709 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
ec338859 AM |
1710 | } |
1711 | ||
69fc87f1 MS |
1712 | /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to |
1713 | the binary, we can optimize a bit. IE32 and GOTIE32 get converted | |
1714 | to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT | |
1715 | we can save the dynamic TLS relocation. */ | |
1716 | if (h->got.refcount > 0 | |
1717 | && !info->shared | |
1718 | && h->dynindx == -1 | |
1719 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
0451c93c | 1720 | { |
69fc87f1 MS |
1721 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) |
1722 | /* For the GOTIE access without a literal pool entry the offset has | |
1723 | to be stored somewhere. The immediate value in the instruction | |
1724 | is not bit enough so the value is stored in the got. */ | |
1725 | { | |
1726 | h->got.offset = htab->sgot->_raw_size; | |
1727 | htab->sgot->_raw_size += GOT_ENTRY_SIZE; | |
1728 | } | |
1729 | else | |
1730 | h->got.offset = (bfd_vma) -1; | |
1731 | } | |
1732 | else if (h->got.refcount > 0) | |
1733 | { | |
0451c93c | 1734 | asection *s; |
b34976b6 | 1735 | bfd_boolean dyn; |
69fc87f1 | 1736 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1737 | |
1738 | /* Make sure this symbol is output as a dynamic symbol. | |
1739 | Undefined weak syms won't yet be marked as dynamic. */ | |
1740 | if (h->dynindx == -1 | |
1741 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1742 | { | |
1743 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1744 | return FALSE; |
0451c93c MS |
1745 | } |
1746 | ||
1747 | s = htab->sgot; | |
1748 | h->got.offset = s->_raw_size; | |
1749 | s->_raw_size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1750 | /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ |
1751 | if (tls_type == GOT_TLS_GD) | |
1752 | s->_raw_size += GOT_ENTRY_SIZE; | |
0451c93c | 1753 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1754 | /* R_390_TLS_IE32 needs one dynamic relocation, |
1755 | R_390_TLS_GD32 needs one if local symbol and two if global. */ | |
1756 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1757 | || tls_type >= GOT_TLS_IE) | |
1758 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
1759 | else if (tls_type == GOT_TLS_GD) | |
1760 | htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rela); | |
1761 | else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) | |
0451c93c MS |
1762 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); |
1763 | } | |
1764 | else | |
1765 | h->got.offset = (bfd_vma) -1; | |
1766 | ||
1767 | eh = (struct elf_s390_link_hash_entry *) h; | |
1768 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1769 | return TRUE; |
0451c93c MS |
1770 | |
1771 | /* In the shared -Bsymbolic case, discard space allocated for | |
1772 | dynamic pc-relative relocs against symbols which turn out to be | |
1773 | defined in regular objects. For the normal shared case, discard | |
1774 | space for pc-relative relocs that have become local due to symbol | |
1775 | visibility changes. */ | |
1776 | ||
1777 | if (info->shared) | |
1778 | { | |
1779 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1780 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1781 | || info->symbolic)) | |
1782 | { | |
1783 | struct elf_s390_dyn_relocs **pp; | |
1784 | ||
1785 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1786 | { | |
1787 | p->count -= p->pc_count; | |
1788 | p->pc_count = 0; | |
1789 | if (p->count == 0) | |
1790 | *pp = p->next; | |
1791 | else | |
1792 | pp = &p->next; | |
1793 | } | |
1794 | } | |
1795 | } | |
1796 | else | |
1797 | { | |
1798 | /* For the non-shared case, discard space for relocs against | |
1799 | symbols which turn out to need copy relocs or are not | |
1800 | dynamic. */ | |
1801 | ||
1802 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1803 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1804 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1805 | || (htab->elf.dynamic_sections_created | |
1806 | && (h->root.type == bfd_link_hash_undefweak | |
1807 | || h->root.type == bfd_link_hash_undefined)))) | |
1808 | { | |
1809 | /* Make sure this symbol is output as a dynamic symbol. | |
1810 | Undefined weak syms won't yet be marked as dynamic. */ | |
1811 | if (h->dynindx == -1 | |
1812 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1813 | { | |
1814 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1815 | return FALSE; |
0451c93c MS |
1816 | } |
1817 | ||
1818 | /* If that succeeded, we know we'll be keeping all the | |
1819 | relocs. */ | |
1820 | if (h->dynindx != -1) | |
1821 | goto keep; | |
1822 | } | |
1823 | ||
1824 | eh->dyn_relocs = NULL; | |
1825 | ||
ec338859 | 1826 | keep: ; |
0451c93c MS |
1827 | } |
1828 | ||
1829 | /* Finally, allocate space. */ | |
1830 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1831 | { | |
1832 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
ae9a127f | 1833 | |
0451c93c MS |
1834 | sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela); |
1835 | } | |
1836 | ||
b34976b6 | 1837 | return TRUE; |
0451c93c MS |
1838 | } |
1839 | ||
1840 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1841 | ||
b34976b6 | 1842 | static bfd_boolean |
0451c93c MS |
1843 | readonly_dynrelocs (h, inf) |
1844 | struct elf_link_hash_entry *h; | |
1845 | PTR inf; | |
1846 | { | |
1847 | struct elf_s390_link_hash_entry *eh; | |
1848 | struct elf_s390_dyn_relocs *p; | |
1849 | ||
e92d460e AM |
1850 | if (h->root.type == bfd_link_hash_warning) |
1851 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1852 | ||
0451c93c MS |
1853 | eh = (struct elf_s390_link_hash_entry *) h; |
1854 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1855 | { | |
1856 | asection *s = p->sec->output_section; | |
1857 | ||
1858 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1859 | { | |
1860 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1861 | ||
1862 | info->flags |= DF_TEXTREL; | |
1863 | ||
1864 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1865 | return FALSE; |
0451c93c MS |
1866 | } |
1867 | } | |
b34976b6 | 1868 | return TRUE; |
0451c93c MS |
1869 | } |
1870 | ||
a85d7ed0 NC |
1871 | /* Set the sizes of the dynamic sections. */ |
1872 | ||
b34976b6 | 1873 | static bfd_boolean |
a85d7ed0 | 1874 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1875 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1876 | struct bfd_link_info *info; |
1877 | { | |
0451c93c | 1878 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1879 | bfd *dynobj; |
1880 | asection *s; | |
b34976b6 | 1881 | bfd_boolean relocs; |
0451c93c | 1882 | bfd *ibfd; |
a85d7ed0 | 1883 | |
0451c93c MS |
1884 | htab = elf_s390_hash_table (info); |
1885 | dynobj = htab->elf.dynobj; | |
1886 | if (dynobj == NULL) | |
1887 | abort (); | |
a85d7ed0 | 1888 | |
0451c93c | 1889 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1890 | { |
1891 | /* Set the contents of the .interp section to the interpreter. */ | |
1892 | if (! info->shared) | |
1893 | { | |
1894 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1895 | if (s == NULL) |
1896 | abort (); | |
a85d7ed0 NC |
1897 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
1898 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1899 | } | |
1900 | } | |
a85d7ed0 | 1901 | |
0451c93c MS |
1902 | /* Set up .got offsets for local syms, and space for local dynamic |
1903 | relocs. */ | |
1904 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 1905 | { |
0451c93c MS |
1906 | bfd_signed_vma *local_got; |
1907 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 1908 | char *local_tls_type; |
0451c93c MS |
1909 | bfd_size_type locsymcount; |
1910 | Elf_Internal_Shdr *symtab_hdr; | |
1911 | asection *srela; | |
a85d7ed0 | 1912 | |
0451c93c | 1913 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
a85d7ed0 NC |
1914 | continue; |
1915 | ||
0451c93c | 1916 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 1917 | { |
ec338859 | 1918 | struct elf_s390_dyn_relocs *p; |
0451c93c | 1919 | |
ec338859 AM |
1920 | for (p = *((struct elf_s390_dyn_relocs **) |
1921 | &elf_section_data (s)->local_dynrel); | |
1922 | p != NULL; | |
1923 | p = p->next) | |
a85d7ed0 | 1924 | { |
ec338859 AM |
1925 | if (!bfd_is_abs_section (p->sec) |
1926 | && bfd_is_abs_section (p->sec->output_section)) | |
1927 | { | |
1928 | /* Input section has been discarded, either because | |
1929 | it is a copy of a linkonce section or due to | |
1930 | linker script /DISCARD/, so we'll be discarding | |
1931 | the relocs too. */ | |
1932 | } | |
248866a8 | 1933 | else if (p->count != 0) |
ec338859 AM |
1934 | { |
1935 | srela = elf_section_data (p->sec)->sreloc; | |
1936 | srela->_raw_size += p->count * sizeof (Elf32_External_Rela); | |
248866a8 AM |
1937 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1938 | info->flags |= DF_TEXTREL; | |
ec338859 | 1939 | } |
a85d7ed0 NC |
1940 | } |
1941 | } | |
0451c93c MS |
1942 | |
1943 | local_got = elf_local_got_refcounts (ibfd); | |
1944 | if (!local_got) | |
1945 | continue; | |
1946 | ||
1947 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1948 | locsymcount = symtab_hdr->sh_info; | |
1949 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 1950 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
1951 | s = htab->sgot; |
1952 | srela = htab->srelgot; | |
69fc87f1 | 1953 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 1954 | { |
0451c93c | 1955 | if (*local_got > 0) |
a85d7ed0 | 1956 | { |
0451c93c MS |
1957 | *local_got = s->_raw_size; |
1958 | s->_raw_size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1959 | if (*local_tls_type == GOT_TLS_GD) |
1960 | s->_raw_size += GOT_ENTRY_SIZE; | |
0451c93c MS |
1961 | if (info->shared) |
1962 | srela->_raw_size += sizeof (Elf32_External_Rela); | |
a85d7ed0 NC |
1963 | } |
1964 | else | |
0451c93c MS |
1965 | *local_got = (bfd_vma) -1; |
1966 | } | |
1967 | } | |
1968 | ||
69fc87f1 MS |
1969 | if (htab->tls_ldm_got.refcount > 0) |
1970 | { | |
1971 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 | |
1972 | relocs. */ | |
1973 | htab->tls_ldm_got.offset = htab->sgot->_raw_size; | |
1974 | htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; | |
1975 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
1976 | } | |
1977 | else | |
1978 | htab->tls_ldm_got.offset = -1; | |
1979 | ||
0451c93c MS |
1980 | /* Allocate global sym .plt and .got entries, and space for global |
1981 | sym dynamic relocs. */ | |
1982 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
1983 | ||
1984 | /* We now have determined the sizes of the various dynamic sections. | |
1985 | Allocate memory for them. */ | |
b34976b6 | 1986 | relocs = FALSE; |
0451c93c MS |
1987 | for (s = dynobj->sections; s != NULL; s = s->next) |
1988 | { | |
1989 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1990 | continue; | |
1991 | ||
1992 | if (s == htab->splt | |
1993 | || s == htab->sgot | |
1994 | || s == htab->sgotplt) | |
1995 | { | |
1996 | /* Strip this section if we don't need it; see the | |
1997 | comment below. */ | |
a85d7ed0 | 1998 | } |
0451c93c MS |
1999 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
2000 | { | |
a779acda | 2001 | if (s->_raw_size != 0) |
b34976b6 | 2002 | relocs = TRUE; |
ec338859 | 2003 | |
0451c93c MS |
2004 | /* We use the reloc_count field as a counter if we need |
2005 | to copy relocs into the output file. */ | |
2006 | s->reloc_count = 0; | |
2007 | } | |
2008 | else | |
a85d7ed0 NC |
2009 | { |
2010 | /* It's not one of our sections, so don't allocate space. */ | |
2011 | continue; | |
2012 | } | |
2013 | ||
0451c93c | 2014 | if (s->_raw_size == 0) |
a85d7ed0 | 2015 | { |
0451c93c MS |
2016 | /* If we don't need this section, strip it from the |
2017 | output file. This is to handle .rela.bss and | |
2018 | .rela.plt. We must create it in | |
2019 | create_dynamic_sections, because it must be created | |
2020 | before the linker maps input sections to output | |
2021 | sections. The linker does that before | |
2022 | adjust_dynamic_symbol is called, and it is that | |
2023 | function which decides whether anything needs to go | |
2024 | into these sections. */ | |
2025 | ||
a85d7ed0 NC |
2026 | _bfd_strip_section_from_output (info, s); |
2027 | continue; | |
2028 | } | |
2029 | ||
0451c93c MS |
2030 | /* Allocate memory for the section contents. We use bfd_zalloc |
2031 | here in case unused entries are not reclaimed before the | |
2032 | section's contents are written out. This should not happen, | |
2033 | but this way if it does, we get a R_390_NONE reloc instead | |
2034 | of garbage. */ | |
2035 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
2036 | if (s->contents == NULL) | |
b34976b6 | 2037 | return FALSE; |
a85d7ed0 | 2038 | } |
ec338859 | 2039 | |
0451c93c | 2040 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2041 | { |
2042 | /* Add some entries to the .dynamic section. We fill in the | |
2043 | values later, in elf_s390_finish_dynamic_sections, but we | |
2044 | must add the entries now so that we get the correct size for | |
2045 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2046 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
2047 | #define add_dynamic_entry(TAG, VAL) \ |
2048 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
ec338859 | 2049 | |
a85d7ed0 NC |
2050 | if (! info->shared) |
2051 | { | |
dc810e39 | 2052 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2053 | return FALSE; |
a85d7ed0 | 2054 | } |
ec338859 | 2055 | |
0451c93c | 2056 | if (htab->splt->_raw_size != 0) |
a85d7ed0 | 2057 | { |
dc810e39 AM |
2058 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2059 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2060 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2061 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2062 | return FALSE; |
a85d7ed0 | 2063 | } |
ec338859 | 2064 | |
a85d7ed0 | 2065 | if (relocs) |
26e41594 AM |
2066 | { |
2067 | if (!add_dynamic_entry (DT_RELA, 0) | |
2068 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2069 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 2070 | return FALSE; |
a85d7ed0 | 2071 | |
0451c93c MS |
2072 | /* If any dynamic relocs apply to a read-only section, |
2073 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2074 | if ((info->flags & DF_TEXTREL) == 0) |
2075 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2076 | (PTR) info); | |
ec338859 | 2077 | |
0451c93c MS |
2078 | if ((info->flags & DF_TEXTREL) != 0) |
2079 | { | |
2080 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2081 | return FALSE; |
0451c93c | 2082 | } |
a85d7ed0 NC |
2083 | } |
2084 | } | |
dc810e39 | 2085 | #undef add_dynamic_entry |
ec338859 | 2086 | |
b34976b6 | 2087 | return TRUE; |
a85d7ed0 NC |
2088 | } |
2089 | ||
69fc87f1 MS |
2090 | /* Return the base VMA address which should be subtracted from real addresses |
2091 | when resolving @dtpoff relocation. | |
2092 | This is PT_TLS segment p_vaddr. */ | |
2093 | ||
2094 | static bfd_vma | |
2095 | dtpoff_base (info) | |
2096 | struct bfd_link_info *info; | |
2097 | { | |
2098 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
2099 | if (elf_hash_table (info)->tls_segment == NULL) | |
2100 | return 0; | |
2101 | return elf_hash_table (info)->tls_segment->start; | |
2102 | } | |
2103 | ||
2104 | /* Return the relocation value for @tpoff relocation | |
2105 | if STT_TLS virtual address is ADDRESS. */ | |
2106 | ||
2107 | static bfd_vma | |
2108 | tpoff (info, address) | |
2109 | struct bfd_link_info *info; | |
2110 | bfd_vma address; | |
2111 | { | |
2112 | struct elf_link_tls_segment *tls_segment | |
2113 | = elf_hash_table (info)->tls_segment; | |
2114 | ||
2115 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
2116 | if (tls_segment == NULL) | |
2117 | return 0; | |
2118 | return (align_power (tls_segment->size, tls_segment->align) | |
2119 | + tls_segment->start - address); | |
2120 | } | |
2121 | ||
2122 | /* Complain if TLS instruction relocation is against an invalid | |
2123 | instruction. */ | |
2124 | ||
2125 | static void | |
2126 | invalid_tls_insn (input_bfd, input_section, rel) | |
2127 | bfd *input_bfd; | |
2128 | asection *input_section; | |
2129 | Elf_Internal_Rela *rel; | |
2130 | { | |
2131 | reloc_howto_type *howto; | |
2132 | ||
2133 | howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
2134 | (*_bfd_error_handler) | |
2135 | (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), | |
2136 | bfd_archive_filename (input_bfd), | |
2137 | bfd_get_section_name (input_bfd, input_section), | |
2138 | (long) rel->r_offset, | |
2139 | howto->name); | |
2140 | } | |
2141 | ||
a85d7ed0 NC |
2142 | /* Relocate a 390 ELF section. */ |
2143 | ||
b34976b6 | 2144 | static bfd_boolean |
a85d7ed0 NC |
2145 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2146 | contents, relocs, local_syms, local_sections) | |
2147 | bfd *output_bfd; | |
2148 | struct bfd_link_info *info; | |
2149 | bfd *input_bfd; | |
2150 | asection *input_section; | |
2151 | bfd_byte *contents; | |
2152 | Elf_Internal_Rela *relocs; | |
2153 | Elf_Internal_Sym *local_syms; | |
2154 | asection **local_sections; | |
2155 | { | |
0451c93c | 2156 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2157 | Elf_Internal_Shdr *symtab_hdr; |
2158 | struct elf_link_hash_entry **sym_hashes; | |
2159 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2160 | Elf_Internal_Rela *rel; |
2161 | Elf_Internal_Rela *relend; | |
2162 | ||
b491616a | 2163 | if (info->relocateable) |
b34976b6 | 2164 | return TRUE; |
b491616a | 2165 | |
0451c93c | 2166 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2167 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2168 | sym_hashes = elf_sym_hashes (input_bfd); | |
2169 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2170 | ||
a85d7ed0 NC |
2171 | rel = relocs; |
2172 | relend = relocs + input_section->reloc_count; | |
2173 | for (; rel < relend; rel++) | |
2174 | { | |
5236c819 | 2175 | unsigned int r_type; |
a85d7ed0 NC |
2176 | reloc_howto_type *howto; |
2177 | unsigned long r_symndx; | |
2178 | struct elf_link_hash_entry *h; | |
2179 | Elf_Internal_Sym *sym; | |
2180 | asection *sec; | |
0451c93c | 2181 | bfd_vma off; |
a85d7ed0 | 2182 | bfd_vma relocation; |
b34976b6 | 2183 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2184 | bfd_reloc_status_type r; |
69fc87f1 | 2185 | int tls_type; |
ec338859 | 2186 | |
a85d7ed0 NC |
2187 | r_type = ELF32_R_TYPE (rel->r_info); |
2188 | if (r_type == (int) R_390_GNU_VTINHERIT | |
26e41594 AM |
2189 | || r_type == (int) R_390_GNU_VTENTRY) |
2190 | continue; | |
5236c819 | 2191 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2192 | { |
2193 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2194 | return FALSE; |
a85d7ed0 | 2195 | } |
ec338859 | 2196 | |
b491616a | 2197 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2198 | r_symndx = ELF32_R_SYM (rel->r_info); |
5236c819 MS |
2199 | |
2200 | /* This is a final link. */ | |
a85d7ed0 NC |
2201 | h = NULL; |
2202 | sym = NULL; | |
2203 | sec = NULL; | |
b34976b6 | 2204 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2205 | if (r_symndx < symtab_hdr->sh_info) |
2206 | { | |
2207 | sym = local_syms + r_symndx; | |
2208 | sec = local_sections[r_symndx]; | |
f8df10f4 | 2209 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
a85d7ed0 NC |
2210 | } |
2211 | else | |
2212 | { | |
2213 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2214 | while (h->root.type == bfd_link_hash_indirect | |
2215 | || h->root.type == bfd_link_hash_warning) | |
2216 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
ec338859 | 2217 | |
a85d7ed0 NC |
2218 | if (h->root.type == bfd_link_hash_defined |
2219 | || h->root.type == bfd_link_hash_defweak) | |
2220 | { | |
2221 | sec = h->root.u.def.section; | |
27018c3f | 2222 | if (sec->output_section == NULL) |
a85d7ed0 | 2223 | { |
0451c93c MS |
2224 | /* Set a flag that will be cleared later if we find a |
2225 | relocation value for this symbol. output_section | |
2226 | is typically NULL for symbols satisfied by a shared | |
2227 | library. */ | |
b34976b6 | 2228 | unresolved_reloc = TRUE; |
a85d7ed0 NC |
2229 | relocation = 0; |
2230 | } | |
2231 | else | |
2232 | relocation = (h->root.u.def.value | |
2233 | + sec->output_section->vma | |
2234 | + sec->output_offset); | |
2235 | } | |
2236 | else if (h->root.type == bfd_link_hash_undefweak) | |
2237 | relocation = 0; | |
671bae9c | 2238 | else if (info->shared |
a85d7ed0 NC |
2239 | && !info->no_undefined |
2240 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
2241 | relocation = 0; | |
2242 | else | |
2243 | { | |
2244 | if (! ((*info->callbacks->undefined_symbol) | |
2245 | (info, h->root.root.string, input_bfd, | |
26e41594 | 2246 | input_section, rel->r_offset, |
0451c93c MS |
2247 | (!info->shared || info->no_undefined |
2248 | || ELF_ST_VISIBILITY (h->other))))) | |
b34976b6 | 2249 | return FALSE; |
a85d7ed0 NC |
2250 | relocation = 0; |
2251 | } | |
2252 | } | |
ec338859 | 2253 | |
a85d7ed0 NC |
2254 | switch (r_type) |
2255 | { | |
5236c819 MS |
2256 | case R_390_GOTPLT12: |
2257 | case R_390_GOTPLT16: | |
2258 | case R_390_GOTPLT32: | |
2259 | case R_390_GOTPLTENT: | |
2260 | /* There are three cases for a GOTPLT relocation. 1) The | |
2261 | relocation is against the jump slot entry of a plt that | |
2262 | will get emitted to the output file. 2) The relocation | |
2263 | is against the jump slot of a plt entry that has been | |
2264 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2265 | as replacement. 3) The relocation is against a local symbol. | |
2266 | Cases 2) and 3) are the same as the GOT relocation code | |
2267 | so we just have to test for case 1 and fall through for | |
2268 | the other two. */ | |
2269 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2270 | { | |
2271 | bfd_vma plt_index; | |
2272 | ||
2273 | /* Calc. index no. | |
2274 | Current offset - size first entry / entry size. */ | |
2275 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2276 | PLT_ENTRY_SIZE; | |
26e41594 | 2277 | |
5236c819 MS |
2278 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2279 | addr & GOT addr. */ | |
2280 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2281 | unresolved_reloc = FALSE; | |
2282 | ||
2283 | if (r_type == R_390_GOTPLTENT) | |
2284 | relocation += htab->sgot->output_section->vma; | |
2285 | break; | |
2286 | } | |
2287 | /* Fall through. */ | |
2288 | ||
26e41594 AM |
2289 | case R_390_GOT12: |
2290 | case R_390_GOT16: | |
2291 | case R_390_GOT32: | |
befc3abb | 2292 | case R_390_GOTENT: |
26e41594 AM |
2293 | /* Relocation is to the entry for this symbol in the global |
2294 | offset table. */ | |
0451c93c MS |
2295 | if (htab->sgot == NULL) |
2296 | abort (); | |
ec338859 | 2297 | |
26e41594 AM |
2298 | if (h != NULL) |
2299 | { | |
b34976b6 | 2300 | bfd_boolean dyn; |
ec338859 | 2301 | |
26e41594 | 2302 | off = h->got.offset; |
0451c93c | 2303 | dyn = htab->elf.dynamic_sections_created; |
26e41594 AM |
2304 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
2305 | || (info->shared | |
2306 | && (info->symbolic | |
0451c93c MS |
2307 | || h->dynindx == -1 |
2308 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
26e41594 AM |
2309 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
2310 | { | |
2311 | /* This is actually a static link, or it is a | |
2312 | -Bsymbolic link and the symbol is defined | |
2313 | locally, or the symbol was forced to be local | |
2314 | because of a version file. We must initialize | |
2315 | this entry in the global offset table. Since the | |
2316 | offset must always be a multiple of 2, we use the | |
2317 | least significant bit to record whether we have | |
2318 | initialized it already. | |
2319 | ||
2320 | When doing a dynamic link, we create a .rel.got | |
2321 | relocation entry to initialize the value. This | |
2322 | is done in the finish_dynamic_symbol routine. */ | |
2323 | if ((off & 1) != 0) | |
2324 | off &= ~1; | |
2325 | else | |
2326 | { | |
a85d7ed0 | 2327 | bfd_put_32 (output_bfd, relocation, |
0451c93c | 2328 | htab->sgot->contents + off); |
26e41594 AM |
2329 | h->got.offset |= 1; |
2330 | } | |
2331 | } | |
0451c93c | 2332 | else |
b34976b6 | 2333 | unresolved_reloc = FALSE; |
26e41594 AM |
2334 | } |
2335 | else | |
2336 | { | |
0451c93c MS |
2337 | if (local_got_offsets == NULL) |
2338 | abort (); | |
a85d7ed0 | 2339 | |
26e41594 | 2340 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2341 | |
26e41594 AM |
2342 | /* The offset must always be a multiple of 4. We use |
2343 | the least significant bit to record whether we have | |
2344 | already generated the necessary reloc. */ | |
2345 | if ((off & 1) != 0) | |
2346 | off &= ~1; | |
2347 | else | |
2348 | { | |
2349 | bfd_put_32 (output_bfd, relocation, | |
0451c93c | 2350 | htab->sgot->contents + off); |
a85d7ed0 | 2351 | |
26e41594 AM |
2352 | if (info->shared) |
2353 | { | |
2354 | asection *srelgot; | |
2355 | Elf_Internal_Rela outrel; | |
947216bf | 2356 | bfd_byte *loc; |
a85d7ed0 | 2357 | |
26e41594 | 2358 | srelgot = htab->srelgot; |
0451c93c MS |
2359 | if (srelgot == NULL) |
2360 | abort (); | |
a85d7ed0 | 2361 | |
26e41594 AM |
2362 | outrel.r_offset = (htab->sgot->output_section->vma |
2363 | + htab->sgot->output_offset | |
2364 | + off); | |
2365 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2366 | outrel.r_addend = relocation; |
947216bf AM |
2367 | loc = srelgot->contents; |
2368 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
26e41594 AM |
2369 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
2370 | } | |
a85d7ed0 | 2371 | |
26e41594 AM |
2372 | local_got_offsets[r_symndx] |= 1; |
2373 | } | |
2374 | } | |
a85d7ed0 | 2375 | |
0451c93c MS |
2376 | if (off >= (bfd_vma) -2) |
2377 | abort (); | |
a85d7ed0 | 2378 | |
0451c93c | 2379 | relocation = htab->sgot->output_offset + off; |
befc3abb | 2380 | |
ae9a127f NC |
2381 | /* For @GOTENT the relocation is against the offset between |
2382 | the instruction and the symbols entry in the GOT and not | |
2383 | between the start of the GOT and the symbols entry. We | |
2384 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2385 | if ( r_type == R_390_GOTENT |
2386 | || r_type == R_390_GOTPLTENT) | |
befc3abb MS |
2387 | relocation += htab->sgot->output_section->vma; |
2388 | ||
26e41594 | 2389 | break; |
dc810e39 | 2390 | |
5236c819 | 2391 | case R_390_GOTOFF16: |
26e41594 AM |
2392 | case R_390_GOTOFF32: |
2393 | /* Relocation is relative to the start of the global offset | |
2394 | table. */ | |
2395 | ||
2396 | /* Note that sgot->output_offset is not involved in this | |
2397 | calculation. We always want the start of .got. If we | |
2398 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2399 | permitted by the ABI, we might have to change this | |
2400 | calculation. */ | |
2401 | relocation -= htab->sgot->output_section->vma; | |
2402 | break; | |
2403 | ||
2404 | case R_390_GOTPC: | |
befc3abb | 2405 | case R_390_GOTPCDBL: |
26e41594 AM |
2406 | /* Use global offset table as symbol value. */ |
2407 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2408 | unresolved_reloc = FALSE; |
26e41594 | 2409 | break; |
a85d7ed0 | 2410 | |
26e41594 AM |
2411 | case R_390_PLT16DBL: |
2412 | case R_390_PLT32DBL: | |
2413 | case R_390_PLT32: | |
2414 | /* Relocation is to the entry for this symbol in the | |
2415 | procedure linkage table. */ | |
a85d7ed0 | 2416 | |
26e41594 AM |
2417 | /* Resolve a PLT32 reloc against a local symbol directly, |
2418 | without using the procedure linkage table. */ | |
2419 | if (h == NULL) | |
2420 | break; | |
a85d7ed0 | 2421 | |
26e41594 | 2422 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2423 | || htab->splt == NULL) |
26e41594 AM |
2424 | { |
2425 | /* We didn't make a PLT entry for this symbol. This | |
2426 | happens when statically linking PIC code, or when | |
2427 | using -Bsymbolic. */ | |
2428 | break; | |
2429 | } | |
2430 | ||
2431 | relocation = (htab->splt->output_section->vma | |
2432 | + htab->splt->output_offset | |
2433 | + h->plt.offset); | |
b34976b6 | 2434 | unresolved_reloc = FALSE; |
26e41594 | 2435 | break; |
a85d7ed0 | 2436 | |
5236c819 MS |
2437 | case R_390_PLTOFF16: |
2438 | case R_390_PLTOFF32: | |
26e41594 AM |
2439 | /* Relocation is to the entry for this symbol in the |
2440 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2441 | |
2442 | /* For local symbols or if we didn't make a PLT entry for | |
2443 | this symbol resolve the symbol directly. */ | |
26e41594 | 2444 | if ( h == NULL |
5236c819 MS |
2445 | || h->plt.offset == (bfd_vma) -1 |
2446 | || htab->splt == NULL) | |
2447 | { | |
2448 | relocation -= htab->sgot->output_section->vma; | |
2449 | break; | |
2450 | } | |
2451 | ||
26e41594 AM |
2452 | relocation = (htab->splt->output_section->vma |
2453 | + htab->splt->output_offset | |
2454 | + h->plt.offset | |
5236c819 MS |
2455 | - htab->sgot->output_section->vma); |
2456 | unresolved_reloc = FALSE; | |
26e41594 AM |
2457 | break; |
2458 | ||
2459 | case R_390_8: | |
2460 | case R_390_16: | |
2461 | case R_390_32: | |
2462 | case R_390_PC16: | |
2463 | case R_390_PC16DBL: | |
2464 | case R_390_PC32DBL: | |
2465 | case R_390_PC32: | |
ec338859 AM |
2466 | /* r_symndx will be zero only for relocs against symbols |
2467 | from removed linkonce sections, or sections discarded by | |
2468 | a linker script. */ | |
26e41594 AM |
2469 | if (r_symndx == 0 |
2470 | || (input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
2471 | break; |
2472 | ||
26e41594 | 2473 | if ((info->shared |
0451c93c MS |
2474 | && ((r_type != R_390_PC16 |
2475 | && r_type != R_390_PC16DBL | |
befc3abb | 2476 | && r_type != R_390_PC32DBL |
0451c93c MS |
2477 | && r_type != R_390_PC32) |
2478 | || (h != NULL | |
2479 | && h->dynindx != -1 | |
2480 | && (! info->symbolic | |
2481 | || (h->elf_link_hash_flags | |
2482 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
2483 | || (!info->shared | |
0451c93c MS |
2484 | && h != NULL |
2485 | && h->dynindx != -1 | |
2486 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
2487 | && (((h->elf_link_hash_flags | |
2488 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2489 | && (h->elf_link_hash_flags | |
2490 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2491 | || h->root.type == bfd_link_hash_undefweak | |
2492 | || h->root.type == bfd_link_hash_undefined))) | |
26e41594 AM |
2493 | { |
2494 | Elf_Internal_Rela outrel; | |
2495 | bfd_boolean skip, relocate; | |
0451c93c | 2496 | asection *sreloc; |
947216bf | 2497 | bfd_byte *loc; |
ec338859 | 2498 | |
0451c93c MS |
2499 | /* When generating a shared object, these relocations |
2500 | are copied into the output file to be resolved at run | |
2501 | time. */ | |
ec338859 | 2502 | |
26e41594 AM |
2503 | skip = FALSE; |
2504 | relocate = FALSE; | |
ec338859 | 2505 | |
c629eae0 JJ |
2506 | outrel.r_offset = |
2507 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2508 | rel->r_offset); | |
2509 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2510 | skip = TRUE; |
0bb2d96a | 2511 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2512 | skip = TRUE, relocate = TRUE; |
26e41594 AM |
2513 | outrel.r_offset += (input_section->output_section->vma |
2514 | + input_section->output_offset); | |
ec338859 | 2515 | |
26e41594 | 2516 | if (skip) |
0bb2d96a | 2517 | memset (&outrel, 0, sizeof outrel); |
26e41594 | 2518 | else if (h != NULL |
0451c93c MS |
2519 | && h->dynindx != -1 |
2520 | && (r_type == R_390_PC16 | |
2521 | || r_type == R_390_PC16DBL | |
befc3abb | 2522 | || r_type == R_390_PC32DBL |
0451c93c MS |
2523 | || r_type == R_390_PC32 |
2524 | || !info->shared | |
2525 | || !info->symbolic | |
2526 | || (h->elf_link_hash_flags | |
2527 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
26e41594 AM |
2528 | { |
2529 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
27018c3f | 2530 | outrel.r_addend = rel->r_addend; |
26e41594 AM |
2531 | } |
2532 | else | |
2533 | { | |
0451c93c | 2534 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 2535 | relocate = TRUE; |
0451c93c MS |
2536 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); |
2537 | outrel.r_addend = relocation + rel->r_addend; | |
26e41594 | 2538 | } |
ec338859 | 2539 | |
0451c93c MS |
2540 | sreloc = elf_section_data (input_section)->sreloc; |
2541 | if (sreloc == NULL) | |
2542 | abort (); | |
ec338859 | 2543 | |
947216bf AM |
2544 | loc = sreloc->contents; |
2545 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 2546 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
ec338859 | 2547 | |
26e41594 AM |
2548 | /* If this reloc is against an external symbol, we do |
2549 | not want to fiddle with the addend. Otherwise, we | |
2550 | need to include the symbol value so that it becomes | |
2551 | an addend for the dynamic reloc. */ | |
2552 | if (! relocate) | |
2553 | continue; | |
2554 | } | |
0451c93c | 2555 | break; |
ec338859 | 2556 | |
69fc87f1 MS |
2557 | /* Relocations for tls literal pool entries. */ |
2558 | case R_390_TLS_IE32: | |
2559 | if (info->shared) | |
2560 | { | |
2561 | Elf_Internal_Rela outrel; | |
2562 | asection *sreloc; | |
2563 | bfd_byte *loc; | |
2564 | ||
2565 | outrel.r_offset = rel->r_offset | |
2566 | + input_section->output_section->vma | |
2567 | + input_section->output_offset; | |
2568 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
2569 | sreloc = elf_section_data (input_section)->sreloc; | |
2570 | if (sreloc == NULL) | |
2571 | abort (); | |
2572 | loc = sreloc->contents; | |
2573 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2574 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
2575 | } | |
ae9a127f | 2576 | /* Fall through. */ |
69fc87f1 MS |
2577 | |
2578 | case R_390_TLS_GD32: | |
2579 | case R_390_TLS_GOTIE32: | |
2580 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2581 | tls_type = GOT_UNKNOWN; | |
2582 | if (h == NULL && local_got_offsets) | |
2583 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2584 | else if (h != NULL) | |
2585 | { | |
2586 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2587 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2588 | r_type = R_390_TLS_LE32; | |
2589 | } | |
2590 | if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) | |
2591 | r_type = R_390_TLS_IE32; | |
2592 | ||
2593 | if (r_type == R_390_TLS_LE32) | |
2594 | { | |
2595 | /* This relocation gets optimized away by the local exec | |
2596 | access optimization. */ | |
2597 | BFD_ASSERT (! unresolved_reloc); | |
2598 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2599 | contents + rel->r_offset); | |
2600 | continue; | |
2601 | } | |
2602 | ||
2603 | if (htab->sgot == NULL) | |
2604 | abort (); | |
2605 | ||
2606 | if (h != NULL) | |
2607 | off = h->got.offset; | |
2608 | else | |
2609 | { | |
2610 | if (local_got_offsets == NULL) | |
2611 | abort (); | |
2612 | ||
2613 | off = local_got_offsets[r_symndx]; | |
2614 | } | |
2615 | ||
2616 | emit_tls_relocs: | |
2617 | ||
2618 | if ((off & 1) != 0) | |
2619 | off &= ~1; | |
26e41594 | 2620 | else |
69fc87f1 MS |
2621 | { |
2622 | Elf_Internal_Rela outrel; | |
2623 | bfd_byte *loc; | |
2624 | int dr_type, indx; | |
2625 | ||
2626 | if (htab->srelgot == NULL) | |
2627 | abort (); | |
2628 | ||
2629 | outrel.r_offset = (htab->sgot->output_section->vma | |
2630 | + htab->sgot->output_offset + off); | |
2631 | ||
2632 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2633 | if (r_type == R_390_TLS_GD32) | |
2634 | dr_type = R_390_TLS_DTPMOD; | |
2635 | else | |
2636 | dr_type = R_390_TLS_TPOFF; | |
2637 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2638 | outrel.r_addend = relocation - dtpoff_base (info); | |
2639 | else | |
2640 | outrel.r_addend = 0; | |
2641 | outrel.r_info = ELF32_R_INFO (indx, dr_type); | |
2642 | loc = htab->srelgot->contents; | |
2643 | loc += htab->srelgot->reloc_count++ | |
2644 | * sizeof (Elf32_External_Rela); | |
2645 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2646 | ||
2647 | if (r_type == R_390_TLS_GD32) | |
2648 | { | |
2649 | if (indx == 0) | |
2650 | { | |
26e41594 | 2651 | BFD_ASSERT (! unresolved_reloc); |
69fc87f1 MS |
2652 | bfd_put_32 (output_bfd, |
2653 | relocation - dtpoff_base (info), | |
2654 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2655 | } | |
2656 | else | |
2657 | { | |
2658 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); | |
2659 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2660 | outrel.r_addend = 0; | |
2661 | htab->srelgot->reloc_count++; | |
2662 | loc += sizeof (Elf32_External_Rela); | |
2663 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2664 | } | |
2665 | } | |
2666 | ||
2667 | if (h != NULL) | |
2668 | h->got.offset |= 1; | |
2669 | else | |
2670 | local_got_offsets[r_symndx] |= 1; | |
2671 | } | |
2672 | ||
2673 | if (off >= (bfd_vma) -2) | |
2674 | abort (); | |
2675 | if (r_type == ELF32_R_TYPE (rel->r_info)) | |
2676 | { | |
2677 | relocation = htab->sgot->output_offset + off; | |
2678 | if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) | |
2679 | relocation += htab->sgot->output_section->vma; | |
2680 | unresolved_reloc = FALSE; | |
2681 | } | |
2682 | else | |
2683 | { | |
2684 | bfd_put_32 (output_bfd, htab->sgot->output_offset + off, | |
2685 | contents + rel->r_offset); | |
2686 | continue; | |
2687 | } | |
2688 | break; | |
2689 | ||
2690 | case R_390_TLS_GOTIE12: | |
2691 | case R_390_TLS_IEENT: | |
2692 | if (h == NULL) | |
2693 | { | |
2694 | if (local_got_offsets == NULL) | |
2695 | abort(); | |
2696 | off = local_got_offsets[r_symndx]; | |
2697 | if (info->shared) | |
2698 | goto emit_tls_relocs; | |
2699 | } | |
2700 | else | |
2701 | { | |
2702 | off = h->got.offset; | |
2703 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2704 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2705 | goto emit_tls_relocs; | |
2706 | } | |
2707 | ||
2708 | if (htab->sgot == NULL) | |
2709 | abort (); | |
2710 | ||
2711 | BFD_ASSERT (! unresolved_reloc); | |
2712 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2713 | htab->sgot->contents + off); | |
2714 | relocation = htab->sgot->output_offset + off; | |
2715 | if (r_type == R_390_TLS_IEENT) | |
2716 | relocation += htab->sgot->output_section->vma; | |
2717 | unresolved_reloc = FALSE; | |
2718 | break; | |
2719 | ||
2720 | case R_390_TLS_LDM32: | |
2721 | if (! info->shared) | |
2722 | /* The literal pool entry this relocation refers to gets ignored | |
2723 | by the optimized code of the local exec model. Do nothing | |
2724 | and the value will turn out zero. */ | |
2725 | continue; | |
2726 | ||
2727 | if (htab->sgot == NULL) | |
2728 | abort (); | |
2729 | ||
2730 | off = htab->tls_ldm_got.offset; | |
2731 | if (off & 1) | |
2732 | off &= ~1; | |
2733 | else | |
2734 | { | |
2735 | Elf_Internal_Rela outrel; | |
2736 | bfd_byte *loc; | |
2737 | ||
2738 | if (htab->srelgot == NULL) | |
2739 | abort (); | |
2740 | ||
2741 | outrel.r_offset = (htab->sgot->output_section->vma | |
2742 | + htab->sgot->output_offset + off); | |
2743 | ||
2744 | bfd_put_32 (output_bfd, 0, | |
2745 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2746 | outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); | |
2747 | outrel.r_addend = 0; | |
2748 | loc = htab->srelgot->contents; | |
2749 | loc += htab->srelgot->reloc_count++ | |
2750 | * sizeof (Elf32_External_Rela); | |
2751 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2752 | htab->tls_ldm_got.offset |= 1; | |
2753 | } | |
2754 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2755 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2756 | break; |
2757 | ||
2758 | case R_390_TLS_LE32: | |
2759 | if (info->shared) | |
2760 | { | |
2761 | /* Linking a shared library with non-fpic code requires | |
2762 | a R_390_TLS_TPOFF relocation. */ | |
2763 | Elf_Internal_Rela outrel; | |
2764 | asection *sreloc; | |
2765 | bfd_byte *loc; | |
2766 | int indx; | |
2767 | ||
2768 | outrel.r_offset = rel->r_offset | |
2769 | + input_section->output_section->vma | |
2770 | + input_section->output_offset; | |
2771 | if (h != NULL && h->dynindx != -1) | |
2772 | indx = h->dynindx; | |
2773 | else | |
2774 | indx = 0; | |
2775 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); | |
2776 | if (indx == 0) | |
2777 | outrel.r_addend = relocation - dtpoff_base (info); | |
2778 | else | |
2779 | outrel.r_addend = 0; | |
2780 | sreloc = elf_section_data (input_section)->sreloc; | |
2781 | if (sreloc == NULL) | |
2782 | abort (); | |
2783 | loc = sreloc->contents; | |
2784 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2785 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2786 | } | |
2787 | else | |
2788 | { | |
2789 | BFD_ASSERT (! unresolved_reloc); | |
2790 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2791 | contents + rel->r_offset); | |
2792 | } | |
2793 | continue; | |
2794 | ||
2795 | case R_390_TLS_LDO32: | |
2796 | if (info->shared || (input_section->flags & SEC_CODE) == 0) | |
2797 | relocation -= dtpoff_base (info); | |
2798 | else | |
2799 | /* When converting LDO to LE, we must negate. */ | |
2800 | relocation = -tpoff (info, relocation); | |
2801 | break; | |
2802 | ||
2803 | /* Relocations for tls instructions. */ | |
2804 | case R_390_TLS_LOAD: | |
2805 | case R_390_TLS_GDCALL: | |
2806 | case R_390_TLS_LDCALL: | |
2807 | tls_type = GOT_UNKNOWN; | |
2808 | if (h == NULL && local_got_offsets) | |
2809 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2810 | else if (h != NULL) | |
2811 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2812 | ||
2813 | if (tls_type == GOT_TLS_GD) | |
2814 | continue; | |
2815 | ||
2816 | if (r_type == R_390_TLS_LOAD) | |
2817 | { | |
2818 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2819 | { | |
2820 | /* IE->LE transition. Four valid cases: | |
2821 | l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 | |
2822 | l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 | |
2823 | l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 | |
2824 | l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2825 | unsigned int insn, ry; | |
2826 | ||
2827 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2828 | ry = 0; | |
2829 | if ((insn & 0xff00f000) == 0x58000000) | |
2830 | /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ | |
2831 | ry = (insn & 0x000f0000); | |
2832 | else if ((insn & 0xff0f0000) == 0x58000000) | |
2833 | /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2834 | ry = (insn & 0x0000f000) << 4; | |
2835 | else if ((insn & 0xff00f000) == 0x5800c000) | |
2836 | /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ | |
2837 | ry = (insn & 0x000f0000); | |
2838 | else if ((insn & 0xff0f0000) == 0x580c0000) | |
2839 | /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2840 | ry = (insn & 0x0000f000) << 4; | |
2841 | else | |
2842 | invalid_tls_insn (input_bfd, input_section, rel); | |
2843 | insn = 0x18000700 | (insn & 0x00f00000) | ry; | |
2844 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2845 | } | |
2846 | } | |
2847 | else if (r_type == R_390_TLS_GDCALL) | |
2848 | { | |
2849 | unsigned int insn; | |
2850 | ||
2851 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2852 | if ((insn & 0xff000fff) != 0x4d000000) | |
2853 | invalid_tls_insn (input_bfd, input_section, rel); | |
2854 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2855 | /* GD->LE transition. | |
2856 | bas %r14,0(%rx,%r13) -> bc 0,0 */ | |
2857 | insn = 0x47000000; | |
2858 | else | |
2859 | /* GD->IE transition. | |
2860 | bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ | |
2861 | insn = 0x5822c000; | |
2862 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2863 | } | |
2864 | else if (r_type == R_390_TLS_LDCALL) | |
2865 | { | |
2866 | if (!info->shared) | |
2867 | { | |
2868 | unsigned int insn; | |
2869 | ||
2870 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2871 | if ((insn & 0xff000fff) != 0x4d000000) | |
2872 | invalid_tls_insn (input_bfd, input_section, rel); | |
2873 | /* LD->LE transition. | |
2874 | bas %r14,0(%rx,%r13) -> bc 0,0 */ | |
2875 | insn = 0x47000000; | |
2876 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2877 | } | |
2878 | } | |
2879 | continue; | |
2880 | ||
0451c93c MS |
2881 | default: |
2882 | break; | |
2883 | } | |
ec338859 | 2884 | |
239e1f3a AM |
2885 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2886 | because such sections are not SEC_ALLOC and thus ld.so will | |
2887 | not process them. */ | |
0451c93c | 2888 | if (unresolved_reloc |
239e1f3a | 2889 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
0451c93c MS |
2890 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
2891 | (*_bfd_error_handler) | |
2892 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
2893 | bfd_archive_filename (input_bfd), | |
2894 | bfd_get_section_name (input_bfd, input_section), | |
2895 | (long) rel->r_offset, | |
2896 | h->root.root.string); | |
ec338859 | 2897 | |
a85d7ed0 | 2898 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
0451c93c MS |
2899 | contents, rel->r_offset, |
2900 | relocation, rel->r_addend); | |
ec338859 | 2901 | |
a85d7ed0 NC |
2902 | if (r != bfd_reloc_ok) |
2903 | { | |
0451c93c | 2904 | const char *name; |
ec338859 | 2905 | |
0451c93c MS |
2906 | if (h != NULL) |
2907 | name = h->root.root.string; | |
2908 | else | |
a85d7ed0 | 2909 | { |
0451c93c MS |
2910 | name = bfd_elf_string_from_elf_section (input_bfd, |
2911 | symtab_hdr->sh_link, | |
2912 | sym->st_name); | |
2913 | if (name == NULL) | |
b34976b6 | 2914 | return FALSE; |
0451c93c MS |
2915 | if (*name == '\0') |
2916 | name = bfd_section_name (input_bfd, sec); | |
2917 | } | |
ec338859 | 2918 | |
0451c93c MS |
2919 | if (r == bfd_reloc_overflow) |
2920 | { | |
ec338859 | 2921 | |
0451c93c MS |
2922 | if (! ((*info->callbacks->reloc_overflow) |
2923 | (info, name, howto->name, (bfd_vma) 0, | |
2924 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 2925 | return FALSE; |
0451c93c MS |
2926 | } |
2927 | else | |
2928 | { | |
2929 | (*_bfd_error_handler) | |
2930 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
2931 | bfd_archive_filename (input_bfd), | |
2932 | bfd_get_section_name (input_bfd, input_section), | |
2933 | (long) rel->r_offset, name, (int) r); | |
b34976b6 | 2934 | return FALSE; |
a85d7ed0 NC |
2935 | } |
2936 | } | |
2937 | } | |
ec338859 | 2938 | |
b34976b6 | 2939 | return TRUE; |
a85d7ed0 NC |
2940 | } |
2941 | ||
2942 | /* Finish up dynamic symbol handling. We set the contents of various | |
2943 | dynamic sections here. */ | |
2944 | ||
b34976b6 | 2945 | static bfd_boolean |
a85d7ed0 NC |
2946 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
2947 | bfd *output_bfd; | |
2948 | struct bfd_link_info *info; | |
2949 | struct elf_link_hash_entry *h; | |
2950 | Elf_Internal_Sym *sym; | |
2951 | { | |
0451c93c | 2952 | struct elf_s390_link_hash_table *htab; |
ec338859 | 2953 | |
0451c93c | 2954 | htab = elf_s390_hash_table (info); |
ec338859 | 2955 | |
a85d7ed0 NC |
2956 | if (h->plt.offset != (bfd_vma) -1) |
2957 | { | |
0451c93c MS |
2958 | bfd_vma plt_index; |
2959 | bfd_vma got_offset; | |
a85d7ed0 | 2960 | Elf_Internal_Rela rela; |
947216bf | 2961 | bfd_byte *loc; |
a85d7ed0 | 2962 | bfd_vma relative_offset; |
ec338859 | 2963 | |
a85d7ed0 | 2964 | /* This symbol has an entry in the procedure linkage table. Set |
26e41594 | 2965 | it up. */ |
0451c93c MS |
2966 | if (h->dynindx == -1 |
2967 | || htab->splt == NULL | |
2968 | || htab->sgotplt == NULL | |
2969 | || htab->srelplt == NULL) | |
2970 | abort (); | |
a85d7ed0 | 2971 | |
dc810e39 | 2972 | /* Calc. index no. |
26e41594 | 2973 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
2974 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
2975 | ||
2976 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, | |
26e41594 | 2977 | addr & GOT addr. */ |
a85d7ed0 NC |
2978 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
2979 | ||
2980 | /* S390 uses halfwords for relative branch calc! */ | |
dc810e39 | 2981 | relative_offset = - ((PLT_FIRST_ENTRY_SIZE + |
26e41594 | 2982 | (PLT_ENTRY_SIZE * plt_index) + 18) / 2); |
a85d7ed0 | 2983 | /* If offset is > 32768, branch to a previous branch |
26e41594 | 2984 | 390 can only handle +-64 K jumps. */ |
dc810e39 | 2985 | if ( -32768 > (int) relative_offset ) |
26e41594 AM |
2986 | relative_offset |
2987 | = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); | |
a85d7ed0 NC |
2988 | |
2989 | /* Fill in the entry in the procedure linkage table. */ | |
2990 | if (!info->shared) | |
0451c93c | 2991 | { |
26e41594 | 2992 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
0451c93c MS |
2993 | htab->splt->contents + h->plt.offset); |
2994 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
2995 | htab->splt->contents + h->plt.offset + 4); | |
2996 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
2997 | htab->splt->contents + h->plt.offset + 8); | |
2998 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
2999 | htab->splt->contents + h->plt.offset + 12); | |
3000 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
3001 | htab->splt->contents + h->plt.offset + 16); | |
3002 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3003 | htab->splt->contents + h->plt.offset + 20); | |
3004 | bfd_put_32 (output_bfd, | |
3005 | (htab->sgotplt->output_section->vma | |
3006 | + htab->sgotplt->output_offset | |
3007 | + got_offset), | |
3008 | htab->splt->contents + h->plt.offset + 24); | |
3009 | } | |
a85d7ed0 | 3010 | else if (got_offset < 4096) |
0451c93c MS |
3011 | { |
3012 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset, | |
3013 | htab->splt->contents + h->plt.offset); | |
3014 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1, | |
3015 | htab->splt->contents + h->plt.offset + 4); | |
3016 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2, | |
3017 | htab->splt->contents + h->plt.offset + 8); | |
3018 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3, | |
3019 | htab->splt->contents + h->plt.offset + 12); | |
3020 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4, | |
3021 | htab->splt->contents + h->plt.offset + 16); | |
3022 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3023 | htab->splt->contents + h->plt.offset + 20); | |
3024 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3025 | htab->splt->contents + h->plt.offset + 24); | |
3026 | } | |
a85d7ed0 | 3027 | else if (got_offset < 32768) |
0451c93c MS |
3028 | { |
3029 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset, | |
3030 | htab->splt->contents + h->plt.offset); | |
3031 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1, | |
3032 | htab->splt->contents + h->plt.offset + 4); | |
3033 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2, | |
3034 | htab->splt->contents + h->plt.offset + 8); | |
3035 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3, | |
3036 | htab->splt->contents + h->plt.offset + 12); | |
3037 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4, | |
3038 | htab->splt->contents + h->plt.offset + 16); | |
3039 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3040 | htab->splt->contents + h->plt.offset + 20); | |
3041 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3042 | htab->splt->contents + h->plt.offset + 24); | |
3043 | } | |
a85d7ed0 | 3044 | else |
0451c93c MS |
3045 | { |
3046 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0, | |
3047 | htab->splt->contents + h->plt.offset); | |
3048 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1, | |
3049 | htab->splt->contents + h->plt.offset + 4); | |
3050 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, | |
3051 | htab->splt->contents + h->plt.offset + 8); | |
3052 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, | |
3053 | htab->splt->contents + h->plt.offset + 12); | |
3054 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, | |
3055 | htab->splt->contents + h->plt.offset + 16); | |
3056 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3057 | htab->splt->contents + h->plt.offset + 20); | |
3058 | bfd_put_32 (output_bfd, got_offset, | |
3059 | htab->splt->contents + h->plt.offset + 24); | |
3060 | } | |
a85d7ed0 NC |
3061 | /* Insert offset into reloc. table here. */ |
3062 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
26e41594 | 3063 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3064 | |
3065 | /* Fill in the entry in the global offset table. | |
26e41594 | 3066 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3067 | bfd_put_32 (output_bfd, |
0451c93c MS |
3068 | (htab->splt->output_section->vma |
3069 | + htab->splt->output_offset | |
a85d7ed0 NC |
3070 | + h->plt.offset |
3071 | + 12), | |
0451c93c | 3072 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3073 | |
0451c93c MS |
3074 | /* Fill in the entry in the .rela.plt section. */ |
3075 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3076 | + htab->sgotplt->output_offset | |
3077 | + got_offset); | |
3078 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3079 | rela.r_addend = 0; | |
947216bf | 3080 | loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela); |
0451c93c | 3081 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
ec338859 | 3082 | |
a85d7ed0 NC |
3083 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
3084 | { | |
3085 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3086 | the .plt section. Leave the value alone. This is a clue |
3087 | for the dynamic linker, to make function pointer | |
3088 | comparisons work between an application and shared | |
ec338859 | 3089 | library. */ |
a85d7ed0 NC |
3090 | sym->st_shndx = SHN_UNDEF; |
3091 | } | |
3092 | } | |
ec338859 | 3093 | |
69fc87f1 MS |
3094 | if (h->got.offset != (bfd_vma) -1 |
3095 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3096 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3097 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3098 | { |
a85d7ed0 | 3099 | Elf_Internal_Rela rela; |
947216bf | 3100 | bfd_byte *loc; |
a85d7ed0 NC |
3101 | |
3102 | /* This symbol has an entry in the global offset table. Set it | |
26e41594 | 3103 | up. */ |
a85d7ed0 | 3104 | |
0451c93c MS |
3105 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3106 | abort (); | |
a85d7ed0 | 3107 | |
0451c93c MS |
3108 | rela.r_offset = (htab->sgot->output_section->vma |
3109 | + htab->sgot->output_offset | |
dc810e39 | 3110 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3111 | |
3112 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3113 | symbol is defined locally or was forced to be local because | |
3114 | of a version file, we just want to emit a RELATIVE reloc. | |
3115 | The entry in the global offset table will already have been | |
3116 | initialized in the relocate_section function. */ | |
0451c93c MS |
3117 | if (info->shared |
3118 | && (info->symbolic | |
3119 | || h->dynindx == -1 | |
3120 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
3121 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
3122 | { | |
3123 | BFD_ASSERT((h->got.offset & 1) != 0); | |
3124 | rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
3125 | rela.r_addend = (h->root.u.def.value | |
26e41594 AM |
3126 | + h->root.u.def.section->output_section->vma |
3127 | + h->root.u.def.section->output_offset); | |
3128 | } | |
a85d7ed0 NC |
3129 | else |
3130 | { | |
3131 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3132 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3133 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); |
26e41594 AM |
3134 | rela.r_addend = 0; |
3135 | } | |
a85d7ed0 | 3136 | |
947216bf AM |
3137 | loc = htab->srelgot->contents; |
3138 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 3139 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3140 | } |
3141 | ||
3142 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3143 | { | |
a85d7ed0 | 3144 | Elf_Internal_Rela rela; |
947216bf | 3145 | bfd_byte *loc; |
a85d7ed0 NC |
3146 | |
3147 | /* This symbols needs a copy reloc. Set it up. */ | |
3148 | ||
0451c93c MS |
3149 | if (h->dynindx == -1 |
3150 | || (h->root.type != bfd_link_hash_defined | |
3151 | && h->root.type != bfd_link_hash_defweak) | |
3152 | || htab->srelbss == NULL) | |
3153 | abort (); | |
a85d7ed0 NC |
3154 | |
3155 | rela.r_offset = (h->root.u.def.value | |
3156 | + h->root.u.def.section->output_section->vma | |
3157 | + h->root.u.def.section->output_offset); | |
3158 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); | |
3159 | rela.r_addend = 0; | |
947216bf AM |
3160 | loc = htab->srelbss->contents; |
3161 | loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 3162 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3163 | } |
3164 | ||
3165 | /* Mark some specially defined symbols as absolute. */ | |
3166 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3167 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3168 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3169 | sym->st_shndx = SHN_ABS; | |
3170 | ||
b34976b6 | 3171 | return TRUE; |
a85d7ed0 NC |
3172 | } |
3173 | ||
0451c93c MS |
3174 | /* Used to decide how to sort relocs in an optimal manner for the |
3175 | dynamic linker, before writing them out. */ | |
3176 | ||
3177 | static enum elf_reloc_type_class | |
3178 | elf_s390_reloc_type_class (rela) | |
3179 | const Elf_Internal_Rela *rela; | |
3180 | { | |
3181 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3182 | { | |
3183 | case R_390_RELATIVE: | |
3184 | return reloc_class_relative; | |
3185 | case R_390_JMP_SLOT: | |
3186 | return reloc_class_plt; | |
3187 | case R_390_COPY: | |
3188 | return reloc_class_copy; | |
3189 | default: | |
3190 | return reloc_class_normal; | |
3191 | } | |
3192 | } | |
3193 | ||
a85d7ed0 NC |
3194 | /* Finish up the dynamic sections. */ |
3195 | ||
b34976b6 | 3196 | static bfd_boolean |
a85d7ed0 NC |
3197 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3198 | bfd *output_bfd; | |
3199 | struct bfd_link_info *info; | |
3200 | { | |
0451c93c | 3201 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3202 | bfd *dynobj; |
3203 | asection *sdyn; | |
a85d7ed0 | 3204 | |
0451c93c MS |
3205 | htab = elf_s390_hash_table (info); |
3206 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3207 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3208 | ||
0451c93c | 3209 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3210 | { |
a85d7ed0 NC |
3211 | Elf32_External_Dyn *dyncon, *dynconend; |
3212 | ||
0451c93c MS |
3213 | if (sdyn == NULL || htab->sgot == NULL) |
3214 | abort (); | |
a85d7ed0 NC |
3215 | |
3216 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3217 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
3218 | for (; dyncon < dynconend; dyncon++) | |
3219 | { | |
3220 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3221 | asection *s; |
ec338859 | 3222 | |
a85d7ed0 | 3223 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3224 | |
a85d7ed0 NC |
3225 | switch (dyn.d_tag) |
3226 | { | |
3227 | default: | |
0451c93c | 3228 | continue; |
ec338859 | 3229 | |
a85d7ed0 | 3230 | case DT_PLTGOT: |
0451c93c MS |
3231 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3232 | break; | |
ec338859 | 3233 | |
a85d7ed0 | 3234 | case DT_JMPREL: |
0451c93c | 3235 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 NC |
3236 | break; |
3237 | ||
3238 | case DT_PLTRELSZ: | |
0451c93c | 3239 | s = htab->srelplt->output_section; |
a85d7ed0 NC |
3240 | if (s->_cooked_size != 0) |
3241 | dyn.d_un.d_val = s->_cooked_size; | |
3242 | else | |
3243 | dyn.d_un.d_val = s->_raw_size; | |
a85d7ed0 NC |
3244 | break; |
3245 | } | |
0451c93c MS |
3246 | |
3247 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3248 | } |
3249 | ||
3250 | /* Fill in the special first entry in the procedure linkage table. */ | |
0451c93c | 3251 | if (htab->splt && htab->splt->_raw_size > 0) |
a85d7ed0 | 3252 | { |
26e41594 AM |
3253 | memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE); |
3254 | if (info->shared) | |
0451c93c | 3255 | { |
dc810e39 | 3256 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0, |
26e41594 | 3257 | htab->splt->contents ); |
dc810e39 | 3258 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1, |
26e41594 | 3259 | htab->splt->contents +4 ); |
dc810e39 | 3260 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2, |
26e41594 | 3261 | htab->splt->contents +8 ); |
dc810e39 | 3262 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3, |
26e41594 | 3263 | htab->splt->contents +12 ); |
dc810e39 | 3264 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4, |
26e41594 AM |
3265 | htab->splt->contents +16 ); |
3266 | } | |
3267 | else | |
3268 | { | |
3269 | bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0, | |
3270 | htab->splt->contents ); | |
3271 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3272 | htab->splt->contents +4 ); | |
3273 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2, | |
3274 | htab->splt->contents +8 ); | |
3275 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3276 | htab->splt->contents +12 ); | |
3277 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3278 | htab->splt->contents +16 ); | |
3279 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3280 | htab->splt->contents +20 ); | |
3281 | bfd_put_32 (output_bfd, | |
3282 | htab->sgotplt->output_section->vma | |
0451c93c | 3283 | + htab->sgotplt->output_offset, |
26e41594 AM |
3284 | htab->splt->contents + 24); |
3285 | } | |
0451c93c MS |
3286 | elf_section_data (htab->splt->output_section) |
3287 | ->this_hdr.sh_entsize = 4; | |
a85d7ed0 NC |
3288 | } |
3289 | ||
3290 | } | |
3291 | ||
0451c93c | 3292 | if (htab->sgotplt) |
a85d7ed0 | 3293 | { |
0451c93c MS |
3294 | /* Fill in the first three entries in the global offset table. */ |
3295 | if (htab->sgotplt->_raw_size > 0) | |
3296 | { | |
3297 | bfd_put_32 (output_bfd, | |
3298 | (sdyn == NULL ? (bfd_vma) 0 | |
3299 | : sdyn->output_section->vma + sdyn->output_offset), | |
3300 | htab->sgotplt->contents); | |
3301 | /* One entry for shared object struct ptr. */ | |
3302 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
3303 | /* One entry for _dl_runtime_resolve. */ | |
3304 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3305 | } | |
a85d7ed0 | 3306 | |
0451c93c MS |
3307 | elf_section_data (htab->sgotplt->output_section) |
3308 | ->this_hdr.sh_entsize = 4; | |
3309 | } | |
b34976b6 | 3310 | return TRUE; |
a85d7ed0 NC |
3311 | } |
3312 | ||
b34976b6 | 3313 | static bfd_boolean |
979f4a38 NC |
3314 | elf_s390_grok_prstatus (abfd, note) |
3315 | bfd * abfd; | |
3316 | Elf_Internal_Note * note; | |
3317 | { | |
3318 | int offset; | |
3319 | unsigned int raw_size; | |
3320 | ||
3321 | switch (note->descsz) | |
3322 | { | |
3323 | default: | |
b34976b6 | 3324 | return FALSE; |
979f4a38 NC |
3325 | |
3326 | case 224: /* S/390 Linux. */ | |
3327 | /* pr_cursig */ | |
3328 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
3329 | ||
3330 | /* pr_pid */ | |
3331 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
3332 | ||
3333 | /* pr_reg */ | |
3334 | offset = 72; | |
3335 | raw_size = 144; | |
3336 | break; | |
3337 | } | |
3338 | ||
3339 | /* Make a ".reg/999" section. */ | |
3340 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
3341 | raw_size, note->descpos + offset); | |
3342 | } | |
3343 | ||
a85d7ed0 NC |
3344 | #define TARGET_BIG_SYM bfd_elf32_s390_vec |
3345 | #define TARGET_BIG_NAME "elf32-s390" | |
3346 | #define ELF_ARCH bfd_arch_s390 | |
3347 | #define ELF_MACHINE_CODE EM_S390 | |
3348 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3349 | #define ELF_MAXPAGESIZE 0x1000 | |
3350 | ||
3351 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3352 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3353 | #define elf_backend_want_got_plt 1 |
3354 | #define elf_backend_plt_readonly 1 | |
3355 | #define elf_backend_want_plt_sym 0 | |
3356 | #define elf_backend_got_header_size 12 | |
3357 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
b491616a | 3358 | #define elf_backend_rela_normal 1 |
a85d7ed0 | 3359 | |
26e41594 | 3360 | #define elf_info_to_howto elf_s390_info_to_howto |
a85d7ed0 | 3361 | |
a85d7ed0 NC |
3362 | #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name |
3363 | #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3364 | #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
3365 | ||
3366 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
26e41594 | 3367 | #define elf_backend_check_relocs elf_s390_check_relocs |
0451c93c MS |
3368 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3369 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3370 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3371 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
26e41594 AM |
3372 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook |
3373 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3374 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
26e41594 | 3375 | #define elf_backend_relocate_section elf_s390_relocate_section |
a85d7ed0 | 3376 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections |
29c2fb7c | 3377 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
979f4a38 | 3378 | #define elf_backend_grok_prstatus elf_s390_grok_prstatus |
a85d7ed0 | 3379 | |
69fc87f1 | 3380 | #define bfd_elf32_mkobject elf_s390_mkobject |
26e41594 | 3381 | #define elf_backend_object_p elf_s390_object_p |
a85d7ed0 NC |
3382 | |
3383 | #include "elf32-target.h" |