Commit | Line | Data |
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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 | |
9c5bfbb7 | 43 | PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *, |
b48fa14c | 44 | struct elf_link_hash_entry *)); |
b34976b6 | 45 | static bfd_boolean elf_s390_check_relocs |
a85d7ed0 NC |
46 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
47 | const Elf_Internal_Rela *)); | |
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 *)); | |
bd1ea41b MS |
91 | static bfd_reloc_status_type s390_elf_ldisp_reloc |
92 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
a85d7ed0 | 93 | |
a85d7ed0 NC |
94 | #include "elf/s390.h" |
95 | ||
96 | /* The relocation "howto" table. */ | |
97 | ||
98 | static reloc_howto_type elf_howto_table[] = | |
99 | { | |
100 | HOWTO (R_390_NONE, /* type */ | |
101 | 0, /* rightshift */ | |
102 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
103 | 0, /* bitsize */ | |
b34976b6 | 104 | FALSE, /* pc_relative */ |
a85d7ed0 NC |
105 | 0, /* bitpos */ |
106 | complain_overflow_dont, /* complain_on_overflow */ | |
107 | bfd_elf_generic_reloc, /* special_function */ | |
108 | "R_390_NONE", /* name */ | |
b34976b6 | 109 | FALSE, /* partial_inplace */ |
a85d7ed0 NC |
110 | 0, /* src_mask */ |
111 | 0, /* dst_mask */ | |
b34976b6 AM |
112 | FALSE), /* pcrel_offset */ |
113 | ||
5236c819 MS |
114 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
115 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), | |
116 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
117 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), | |
118 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
119 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), | |
120 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
121 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), | |
122 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
123 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), | |
15f8604d | 124 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, |
5236c819 MS |
125 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
126 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
127 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), | |
128 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
129 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), | |
130 | HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
131 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), | |
132 | HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
133 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), | |
134 | HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
135 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), | |
136 | HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
137 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), | |
138 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
139 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), | |
140 | HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
141 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), | |
142 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
143 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), | |
144 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), | |
146 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
147 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), | |
148 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
149 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), | |
150 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
151 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), | |
152 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
153 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), | |
154 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
155 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), | |
156 | EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ | |
157 | EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ | |
158 | EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ | |
159 | EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ | |
160 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
161 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), | |
162 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
163 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
164 | EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ | |
165 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
166 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), | |
167 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
168 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), | |
169 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
170 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), | |
171 | EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ | |
172 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
173 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), | |
174 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
175 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
176 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
177 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), | |
178 | EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ | |
69fc87f1 MS |
179 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
180 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), | |
181 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
182 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), | |
183 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
184 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), | |
185 | HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
186 | bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), | |
187 | EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ | |
188 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
189 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), | |
190 | HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
191 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), | |
192 | EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ | |
193 | HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
194 | bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), | |
195 | EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ | |
196 | HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
197 | bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), | |
198 | EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ | |
199 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
200 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), | |
201 | HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
202 | bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), | |
203 | EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ | |
204 | HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
205 | bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), | |
206 | EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ | |
207 | HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
208 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), | |
209 | HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
210 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), | |
211 | HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
212 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), | |
bd1ea41b MS |
213 | HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
214 | s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), | |
215 | HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
216 | s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), | |
217 | HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
218 | s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), | |
219 | HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
220 | s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), | |
a85d7ed0 NC |
221 | }; |
222 | ||
223 | /* GNU extension to record C++ vtable hierarchy. */ | |
224 | static reloc_howto_type elf32_s390_vtinherit_howto = | |
b34976b6 | 225 | HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
a85d7ed0 | 226 | static reloc_howto_type elf32_s390_vtentry_howto = |
b34976b6 | 227 | 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 |
228 | |
229 | static reloc_howto_type * | |
230 | elf_s390_reloc_type_lookup (abfd, code) | |
231 | bfd *abfd ATTRIBUTE_UNUSED; | |
232 | bfd_reloc_code_real_type code; | |
233 | { | |
ec338859 | 234 | switch (code) |
0451c93c MS |
235 | { |
236 | case BFD_RELOC_NONE: | |
237 | return &elf_howto_table[(int) R_390_NONE]; | |
238 | case BFD_RELOC_8: | |
239 | return &elf_howto_table[(int) R_390_8]; | |
240 | case BFD_RELOC_390_12: | |
241 | return &elf_howto_table[(int) R_390_12]; | |
242 | case BFD_RELOC_16: | |
243 | return &elf_howto_table[(int) R_390_16]; | |
244 | case BFD_RELOC_32: | |
245 | return &elf_howto_table[(int) R_390_32]; | |
246 | case BFD_RELOC_CTOR: | |
247 | return &elf_howto_table[(int) R_390_32]; | |
248 | case BFD_RELOC_32_PCREL: | |
249 | return &elf_howto_table[(int) R_390_PC32]; | |
250 | case BFD_RELOC_390_GOT12: | |
251 | return &elf_howto_table[(int) R_390_GOT12]; | |
252 | case BFD_RELOC_32_GOT_PCREL: | |
253 | return &elf_howto_table[(int) R_390_GOT32]; | |
254 | case BFD_RELOC_390_PLT32: | |
255 | return &elf_howto_table[(int) R_390_PLT32]; | |
256 | case BFD_RELOC_390_COPY: | |
257 | return &elf_howto_table[(int) R_390_COPY]; | |
258 | case BFD_RELOC_390_GLOB_DAT: | |
259 | return &elf_howto_table[(int) R_390_GLOB_DAT]; | |
260 | case BFD_RELOC_390_JMP_SLOT: | |
261 | return &elf_howto_table[(int) R_390_JMP_SLOT]; | |
262 | case BFD_RELOC_390_RELATIVE: | |
263 | return &elf_howto_table[(int) R_390_RELATIVE]; | |
264 | case BFD_RELOC_32_GOTOFF: | |
5236c819 | 265 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
0451c93c MS |
266 | case BFD_RELOC_390_GOTPC: |
267 | return &elf_howto_table[(int) R_390_GOTPC]; | |
268 | case BFD_RELOC_390_GOT16: | |
269 | return &elf_howto_table[(int) R_390_GOT16]; | |
270 | case BFD_RELOC_16_PCREL: | |
271 | return &elf_howto_table[(int) R_390_PC16]; | |
272 | case BFD_RELOC_390_PC16DBL: | |
273 | return &elf_howto_table[(int) R_390_PC16DBL]; | |
274 | case BFD_RELOC_390_PLT16DBL: | |
275 | return &elf_howto_table[(int) R_390_PLT16DBL]; | |
befc3abb MS |
276 | case BFD_RELOC_390_PC32DBL: |
277 | return &elf_howto_table[(int) R_390_PC32DBL]; | |
278 | case BFD_RELOC_390_PLT32DBL: | |
279 | return &elf_howto_table[(int) R_390_PLT32DBL]; | |
280 | case BFD_RELOC_390_GOTPCDBL: | |
281 | return &elf_howto_table[(int) R_390_GOTPCDBL]; | |
282 | case BFD_RELOC_390_GOTENT: | |
283 | return &elf_howto_table[(int) R_390_GOTENT]; | |
5236c819 MS |
284 | case BFD_RELOC_16_GOTOFF: |
285 | return &elf_howto_table[(int) R_390_GOTOFF16]; | |
286 | case BFD_RELOC_390_GOTPLT12: | |
287 | return &elf_howto_table[(int) R_390_GOTPLT12]; | |
288 | case BFD_RELOC_390_GOTPLT16: | |
289 | return &elf_howto_table[(int) R_390_GOTPLT16]; | |
290 | case BFD_RELOC_390_GOTPLT32: | |
291 | return &elf_howto_table[(int) R_390_GOTPLT32]; | |
292 | case BFD_RELOC_390_GOTPLTENT: | |
293 | return &elf_howto_table[(int) R_390_GOTPLTENT]; | |
294 | case BFD_RELOC_390_PLTOFF16: | |
295 | return &elf_howto_table[(int) R_390_PLTOFF16]; | |
296 | case BFD_RELOC_390_PLTOFF32: | |
297 | return &elf_howto_table[(int) R_390_PLTOFF32]; | |
69fc87f1 MS |
298 | case BFD_RELOC_390_TLS_LOAD: |
299 | return &elf_howto_table[(int) R_390_TLS_LOAD]; | |
300 | case BFD_RELOC_390_TLS_GDCALL: | |
301 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; | |
302 | case BFD_RELOC_390_TLS_LDCALL: | |
303 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; | |
304 | case BFD_RELOC_390_TLS_GD32: | |
305 | return &elf_howto_table[(int) R_390_TLS_GD32]; | |
306 | case BFD_RELOC_390_TLS_GOTIE12: | |
307 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; | |
308 | case BFD_RELOC_390_TLS_GOTIE32: | |
309 | return &elf_howto_table[(int) R_390_TLS_GOTIE32]; | |
310 | case BFD_RELOC_390_TLS_LDM32: | |
311 | return &elf_howto_table[(int) R_390_TLS_LDM32]; | |
312 | case BFD_RELOC_390_TLS_IE32: | |
313 | return &elf_howto_table[(int) R_390_TLS_IE32]; | |
314 | case BFD_RELOC_390_TLS_IEENT: | |
315 | return &elf_howto_table[(int) R_390_TLS_IEENT]; | |
316 | case BFD_RELOC_390_TLS_LE32: | |
317 | return &elf_howto_table[(int) R_390_TLS_LE32]; | |
318 | case BFD_RELOC_390_TLS_LDO32: | |
319 | return &elf_howto_table[(int) R_390_TLS_LDO32]; | |
320 | case BFD_RELOC_390_TLS_DTPMOD: | |
321 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; | |
322 | case BFD_RELOC_390_TLS_DTPOFF: | |
323 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; | |
324 | case BFD_RELOC_390_TLS_TPOFF: | |
325 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; | |
bd1ea41b MS |
326 | case BFD_RELOC_390_20: |
327 | return &elf_howto_table[(int) R_390_20]; | |
328 | case BFD_RELOC_390_GOT20: | |
329 | return &elf_howto_table[(int) R_390_GOT20]; | |
330 | case BFD_RELOC_390_GOTPLT20: | |
331 | return &elf_howto_table[(int) R_390_GOTPLT20]; | |
332 | case BFD_RELOC_390_TLS_GOTIE20: | |
333 | return &elf_howto_table[(int) R_390_TLS_GOTIE20]; | |
0451c93c MS |
334 | case BFD_RELOC_VTABLE_INHERIT: |
335 | return &elf32_s390_vtinherit_howto; | |
336 | case BFD_RELOC_VTABLE_ENTRY: | |
337 | return &elf32_s390_vtentry_howto; | |
338 | default: | |
339 | break; | |
340 | } | |
a85d7ed0 NC |
341 | return 0; |
342 | } | |
343 | ||
344 | /* We need to use ELF32_R_TYPE so we have our own copy of this function, | |
345 | and elf32-s390.c has its own copy. */ | |
346 | ||
347 | static void | |
348 | elf_s390_info_to_howto (abfd, cache_ptr, dst) | |
349 | bfd *abfd ATTRIBUTE_UNUSED; | |
350 | arelent *cache_ptr; | |
351 | Elf_Internal_Rela *dst; | |
352 | { | |
353 | switch (ELF32_R_TYPE(dst->r_info)) | |
354 | { | |
355 | case R_390_GNU_VTINHERIT: | |
356 | cache_ptr->howto = &elf32_s390_vtinherit_howto; | |
357 | break; | |
358 | ||
359 | case R_390_GNU_VTENTRY: | |
360 | cache_ptr->howto = &elf32_s390_vtentry_howto; | |
361 | break; | |
362 | ||
363 | default: | |
364 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max); | |
365 | cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)]; | |
dc810e39 | 366 | } |
a85d7ed0 NC |
367 | } |
368 | ||
69fc87f1 MS |
369 | /* A relocation function which doesn't do anything. */ |
370 | static bfd_reloc_status_type | |
371 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 372 | output_bfd, error_message) |
69fc87f1 MS |
373 | bfd *abfd ATTRIBUTE_UNUSED; |
374 | arelent *reloc_entry; | |
375 | asymbol *symbol ATTRIBUTE_UNUSED; | |
376 | PTR data ATTRIBUTE_UNUSED; | |
377 | asection *input_section; | |
378 | bfd *output_bfd; | |
379 | char **error_message ATTRIBUTE_UNUSED; | |
380 | { | |
381 | if (output_bfd) | |
382 | reloc_entry->address += input_section->output_offset; | |
383 | return bfd_reloc_ok; | |
384 | } | |
385 | ||
bd1ea41b MS |
386 | /* Handle the large displacement relocs. */ |
387 | static bfd_reloc_status_type | |
388 | s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, | |
389 | output_bfd, error_message) | |
390 | bfd *abfd ATTRIBUTE_UNUSED; | |
391 | arelent *reloc_entry; | |
392 | asymbol *symbol; | |
393 | PTR data ATTRIBUTE_UNUSED; | |
394 | asection *input_section; | |
395 | bfd *output_bfd; | |
396 | char **error_message ATTRIBUTE_UNUSED; | |
397 | { | |
398 | reloc_howto_type *howto = reloc_entry->howto; | |
399 | bfd_vma relocation; | |
400 | bfd_vma insn; | |
401 | ||
402 | if (output_bfd != (bfd *) NULL | |
403 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
404 | && (! howto->partial_inplace | |
405 | || reloc_entry->addend == 0)) | |
406 | { | |
407 | reloc_entry->address += input_section->output_offset; | |
408 | return bfd_reloc_ok; | |
409 | } | |
410 | ||
411 | if (output_bfd != NULL) | |
412 | return bfd_reloc_continue; | |
413 | ||
414 | if (reloc_entry->address > input_section->_cooked_size) | |
415 | return bfd_reloc_outofrange; | |
416 | ||
417 | relocation = (symbol->value | |
418 | + symbol->section->output_section->vma | |
419 | + symbol->section->output_offset); | |
420 | relocation += reloc_entry->addend; | |
421 | if (howto->pc_relative) | |
422 | { | |
423 | relocation -= (input_section->output_section->vma | |
424 | + input_section->output_offset); | |
425 | relocation -= reloc_entry->address; | |
426 | } | |
427 | ||
428 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
429 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; | |
430 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
431 | ||
432 | if ((bfd_signed_vma) relocation < - 0x80000 | |
433 | || (bfd_signed_vma) relocation > 0x7ffff) | |
434 | return bfd_reloc_overflow; | |
435 | else | |
436 | return bfd_reloc_ok; | |
437 | } | |
438 | ||
b34976b6 | 439 | static bfd_boolean |
a85d7ed0 NC |
440 | elf_s390_is_local_label_name (abfd, name) |
441 | bfd *abfd; | |
442 | const char *name; | |
443 | { | |
444 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 445 | return TRUE; |
a85d7ed0 NC |
446 | |
447 | return _bfd_elf_is_local_label_name (abfd, name); | |
448 | } | |
449 | ||
450 | /* Functions for the 390 ELF linker. */ | |
451 | ||
452 | /* The name of the dynamic interpreter. This is put in the .interp | |
453 | section. */ | |
454 | ||
455 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
456 | ||
64285810 MS |
457 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
458 | copying dynamic variables from a shared lib into an app's dynbss | |
459 | section, and instead use a dynamic relocation to point into the | |
460 | shared lib. */ | |
461 | #define ELIMINATE_COPY_RELOCS 1 | |
462 | ||
a85d7ed0 NC |
463 | /* The size in bytes of the first entry in the procedure linkage table. */ |
464 | #define PLT_FIRST_ENTRY_SIZE 32 | |
465 | /* The size in bytes of an entry in the procedure linkage table. */ | |
dc810e39 | 466 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
467 | |
468 | #define GOT_ENTRY_SIZE 4 | |
469 | ||
470 | /* The first three entries in a procedure linkage table are reserved, | |
471 | and the initial contents are unimportant (we zero them out). | |
472 | Subsequent entries look like this. See the SVR4 ABI 386 | |
473 | supplement to see how this works. */ | |
474 | ||
475 | /* For the s390, simple addr offset can only be 0 - 4096. | |
476 | To use the full 2 GB address space, several instructions | |
477 | are needed to load an address in a register and execute | |
478 | a branch( or just saving the address) | |
479 | ||
dc810e39 | 480 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
481 | |
482 | /* The first 3 words in the GOT are then reserved. | |
483 | Word 0 is the address of the dynamic table. | |
484 | Word 1 is a pointer to a structure describing the object | |
485 | Word 2 is used to point to the loader entry address. | |
486 | ||
487 | The code for position independand PLT entries looks like this: | |
488 | ||
489 | r12 holds addr of the current GOT at entry to the PLT | |
490 | ||
491 | The GOT holds the address in the PLT to be executed. | |
492 | The loader then gets: | |
493 | 24(15) = Pointer to the structure describing the object. | |
dc810e39 | 494 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
495 | |
496 | The loader must then find the module where the function is | |
497 | and insert the address in the GOT. | |
498 | ||
499 | Note: 390 can only address +- 64 K relative. | |
500 | We check if offset > 65536, then make a relative branch -64xxx | |
501 | back to a previous defined branch | |
502 | ||
503 | PLT1: BASR 1,0 # 2 bytes | |
504 | L 1,22(1) # 4 bytes Load offset in GOT in r 1 | |
505 | L 1,(1,12) # 4 bytes Load address from GOT in r1 | |
506 | BCR 15,1 # 2 bytes Jump to address | |
507 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
508 | L 1,14(1) # 4 bytes Load offset in symol table in r1 | |
509 | BRC 15,-x # 4 bytes Jump to start of PLT | |
510 | .word 0 # 2 bytes filler | |
511 | .long ? # 4 bytes offset in GOT | |
512 | .long ? # 4 bytes offset into symbol table | |
513 | ||
514 | This was the general case. There are two additional, optimizes PLT | |
515 | definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. | |
516 | First the one for GOT offsets < 4096: | |
517 | ||
518 | PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 | |
519 | BCR 15,1 # 2 bytes Jump to address | |
520 | .word 0,0,0 # 6 bytes filler | |
521 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
522 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
523 | BRC 15,-x # 4 bytes Jump to start of PLT | |
524 | .word 0,0,0 # 6 bytes filler | |
525 | .long ? # 4 bytes offset into symbol table | |
526 | ||
527 | Second the one for GOT offsets < 32768: | |
528 | ||
529 | PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 | |
530 | L 1,(1,12) # 4 bytes Load address from GOT to r1 | |
531 | BCR 15,1 # 2 bytes Jump to address | |
532 | .word 0 # 2 bytes filler | |
533 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
534 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
535 | BRC 15,-x # 4 bytes Jump to start of PLT | |
536 | .word 0,0,0 # 6 bytes filler | |
537 | .long ? # 4 bytes offset into symbol table | |
538 | ||
539 | Total = 32 bytes per PLT entry | |
540 | ||
541 | The code for static build PLT entries looks like this: | |
542 | ||
543 | PLT1: BASR 1,0 # 2 bytes | |
544 | L 1,22(1) # 4 bytes Load address of GOT entry | |
545 | L 1,0(0,1) # 4 bytes Load address from GOT in r1 | |
546 | BCR 15,1 # 2 bytes Jump to address | |
547 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
548 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
549 | BRC 15,-x # 4 bytes Jump to start of PLT | |
550 | .word 0 # 2 bytes filler | |
551 | .long ? # 4 bytes address of GOT entry | |
552 | .long ? # 4 bytes offset into symbol table */ | |
553 | ||
554 | #define PLT_PIC_ENTRY_WORD0 0x0d105810 | |
555 | #define PLT_PIC_ENTRY_WORD1 0x10165811 | |
556 | #define PLT_PIC_ENTRY_WORD2 0xc00007f1 | |
557 | #define PLT_PIC_ENTRY_WORD3 0x0d105810 | |
558 | #define PLT_PIC_ENTRY_WORD4 0x100ea7f4 | |
559 | ||
560 | #define PLT_PIC12_ENTRY_WORD0 0x5810c000 | |
561 | #define PLT_PIC12_ENTRY_WORD1 0x07f10000 | |
562 | #define PLT_PIC12_ENTRY_WORD2 0x00000000 | |
563 | #define PLT_PIC12_ENTRY_WORD3 0x0d105810 | |
564 | #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4 | |
565 | ||
566 | #define PLT_PIC16_ENTRY_WORD0 0xa7180000 | |
567 | #define PLT_PIC16_ENTRY_WORD1 0x5811c000 | |
568 | #define PLT_PIC16_ENTRY_WORD2 0x07f10000 | |
569 | #define PLT_PIC16_ENTRY_WORD3 0x0d105810 | |
570 | #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4 | |
571 | ||
572 | #define PLT_ENTRY_WORD0 0x0d105810 | |
573 | #define PLT_ENTRY_WORD1 0x10165810 | |
574 | #define PLT_ENTRY_WORD2 0x100007f1 | |
575 | #define PLT_ENTRY_WORD3 0x0d105810 | |
576 | #define PLT_ENTRY_WORD4 0x100ea7f4 | |
577 | ||
578 | /* The first PLT entry pushes the offset into the symbol table | |
579 | from R1 onto the stack at 8(15) and the loader object info | |
580 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
581 | ||
582 | /* The first entry in the PLT for PIC code: | |
583 | ||
584 | PLT0: | |
585 | ST 1,28(15) # R1 has offset into symbol table | |
586 | L 1,4(12) # Get loader ino(object struct address) | |
dc810e39 | 587 | ST 1,24(15) # Store address |
a85d7ed0 NC |
588 | L 1,8(12) # Entry address of loader in R1 |
589 | BR 1 # Jump to loader | |
590 | ||
591 | The first entry in the PLT for static code: | |
592 | ||
593 | PLT0: | |
594 | ST 1,28(15) # R1 has offset into symbol table | |
595 | BASR 1,0 | |
596 | L 1,18(0,1) # Get address of GOT | |
597 | MVC 24(4,15),4(1) # Move loader ino to stack | |
598 | L 1,8(1) # Get address of loader | |
599 | BR 1 # Jump to loader | |
600 | .word 0 # filler | |
601 | .long got # address of GOT */ | |
602 | ||
603 | #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c | |
604 | #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004 | |
605 | #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018 | |
606 | #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008 | |
607 | #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000 | |
608 | ||
609 | #define PLT_FIRST_ENTRY_WORD0 0x5010f01c | |
610 | #define PLT_FIRST_ENTRY_WORD1 0x0d105810 | |
611 | #define PLT_FIRST_ENTRY_WORD2 0x1012D203 | |
612 | #define PLT_FIRST_ENTRY_WORD3 0xf0181004 | |
613 | #define PLT_FIRST_ENTRY_WORD4 0x58101008 | |
614 | #define PLT_FIRST_ENTRY_WORD5 0x07f10000 | |
615 | ||
616 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
617 | decides to copy as dynamic relocs in check_relocs for each symbol. |
618 | This is so that it can later discard them if they are found to be | |
619 | unnecessary. We store the information in a field extending the | |
620 | regular ELF linker hash table. */ | |
a85d7ed0 | 621 | |
0451c93c | 622 | struct elf_s390_dyn_relocs |
a85d7ed0 | 623 | { |
0451c93c MS |
624 | struct elf_s390_dyn_relocs *next; |
625 | ||
626 | /* The input section of the reloc. */ | |
627 | asection *sec; | |
628 | ||
629 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 630 | bfd_size_type count; |
0451c93c MS |
631 | |
632 | /* Number of pc-relative relocs copied for the input section. */ | |
633 | bfd_size_type pc_count; | |
a85d7ed0 NC |
634 | }; |
635 | ||
636 | /* s390 ELF linker hash entry. */ | |
637 | ||
638 | struct elf_s390_link_hash_entry | |
639 | { | |
0451c93c | 640 | struct elf_link_hash_entry elf; |
a85d7ed0 | 641 | |
0451c93c MS |
642 | /* Track dynamic relocs copied for this symbol. */ |
643 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
644 | |
645 | /* Number of GOTPLT references for a function. */ | |
646 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
647 | |
648 | #define GOT_UNKNOWN 0 | |
649 | #define GOT_NORMAL 1 | |
650 | #define GOT_TLS_GD 2 | |
651 | #define GOT_TLS_IE 3 | |
652 | #define GOT_TLS_IE_NLT 4 | |
653 | unsigned char tls_type; | |
a85d7ed0 NC |
654 | }; |
655 | ||
69fc87f1 MS |
656 | #define elf_s390_hash_entry(ent) \ |
657 | ((struct elf_s390_link_hash_entry *)(ent)) | |
658 | ||
659 | struct elf_s390_obj_tdata | |
660 | { | |
661 | struct elf_obj_tdata root; | |
662 | ||
663 | /* tls_type for each local got entry. */ | |
664 | char *local_got_tls_type; | |
665 | }; | |
666 | ||
667 | #define elf_s390_tdata(abfd) \ | |
668 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
669 | ||
670 | #define elf_s390_local_got_tls_type(abfd) \ | |
671 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
672 | ||
673 | static bfd_boolean | |
674 | elf_s390_mkobject (abfd) | |
675 | bfd *abfd; | |
676 | { | |
677 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
678 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
679 | if (abfd->tdata.any == NULL) | |
680 | return FALSE; | |
681 | return TRUE; | |
682 | } | |
683 | ||
684 | static bfd_boolean | |
685 | elf_s390_object_p (abfd) | |
686 | bfd *abfd; | |
687 | { | |
688 | /* Allocate our special target data. */ | |
689 | struct elf_s390_obj_tdata *new_tdata; | |
690 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
691 | new_tdata = bfd_zalloc (abfd, amt); | |
692 | if (new_tdata == NULL) | |
693 | return FALSE; | |
694 | new_tdata->root = *abfd->tdata.elf_obj_data; | |
695 | abfd->tdata.any = new_tdata; | |
696 | /* Set the right machine number for an s390 elf32 file. */ | |
697 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); | |
698 | } | |
699 | ||
a85d7ed0 NC |
700 | /* s390 ELF linker hash table. */ |
701 | ||
702 | struct elf_s390_link_hash_table | |
703 | { | |
0451c93c | 704 | struct elf_link_hash_table elf; |
a85d7ed0 | 705 | |
0451c93c MS |
706 | /* Short-cuts to get to dynamic linker sections. */ |
707 | asection *sgot; | |
708 | asection *sgotplt; | |
709 | asection *srelgot; | |
710 | asection *splt; | |
711 | asection *srelplt; | |
712 | asection *sdynbss; | |
713 | asection *srelbss; | |
ec338859 | 714 | |
69fc87f1 MS |
715 | union { |
716 | bfd_signed_vma refcount; | |
717 | bfd_vma offset; | |
718 | } tls_ldm_got; | |
719 | ||
ec338859 AM |
720 | /* Small local sym to section mapping cache. */ |
721 | struct sym_sec_cache sym_sec; | |
0451c93c | 722 | }; |
a85d7ed0 NC |
723 | |
724 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
725 | ||
726 | #define elf_s390_hash_table(p) \ | |
727 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
728 | ||
729 | /* Create an entry in an s390 ELF linker hash table. */ | |
730 | ||
731 | static struct bfd_hash_entry * | |
0451c93c | 732 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
733 | struct bfd_hash_entry *entry; |
734 | struct bfd_hash_table *table; | |
735 | const char *string; | |
736 | { | |
a85d7ed0 NC |
737 | /* Allocate the structure if it has not already been allocated by a |
738 | subclass. */ | |
0451c93c MS |
739 | if (entry == NULL) |
740 | { | |
741 | entry = bfd_hash_allocate (table, | |
742 | sizeof (struct elf_s390_link_hash_entry)); | |
743 | if (entry == NULL) | |
744 | return entry; | |
745 | } | |
ec338859 | 746 | |
a85d7ed0 | 747 | /* Call the allocation method of the superclass. */ |
0451c93c MS |
748 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
749 | if (entry != NULL) | |
a85d7ed0 | 750 | { |
0451c93c | 751 | struct elf_s390_link_hash_entry *eh; |
ec338859 | 752 | |
0451c93c MS |
753 | eh = (struct elf_s390_link_hash_entry *) entry; |
754 | eh->dyn_relocs = NULL; | |
5236c819 | 755 | eh->gotplt_refcount = 0; |
69fc87f1 | 756 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
757 | } |
758 | ||
0451c93c | 759 | return entry; |
a85d7ed0 NC |
760 | } |
761 | ||
762 | /* Create an s390 ELF linker hash table. */ | |
763 | ||
764 | static struct bfd_link_hash_table * | |
765 | elf_s390_link_hash_table_create (abfd) | |
766 | bfd *abfd; | |
767 | { | |
768 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 769 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 770 | |
e2d34d7d | 771 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 772 | if (ret == NULL) |
a85d7ed0 NC |
773 | return NULL; |
774 | ||
0451c93c | 775 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
a85d7ed0 | 776 | { |
e2d34d7d | 777 | free (ret); |
a85d7ed0 NC |
778 | return NULL; |
779 | } | |
780 | ||
0451c93c MS |
781 | ret->sgot = NULL; |
782 | ret->sgotplt = NULL; | |
783 | ret->srelgot = NULL; | |
784 | ret->splt = NULL; | |
785 | ret->srelplt = NULL; | |
786 | ret->sdynbss = NULL; | |
787 | ret->srelbss = NULL; | |
69fc87f1 | 788 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 789 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
790 | |
791 | return &ret->elf.root; | |
792 | } | |
793 | ||
794 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
795 | shortcuts to them in our hash table. */ | |
796 | ||
b34976b6 | 797 | static bfd_boolean |
0451c93c MS |
798 | create_got_section (dynobj, info) |
799 | bfd *dynobj; | |
800 | struct bfd_link_info *info; | |
801 | { | |
802 | struct elf_s390_link_hash_table *htab; | |
803 | ||
804 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 805 | return FALSE; |
0451c93c MS |
806 | |
807 | htab = elf_s390_hash_table (info); | |
808 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
809 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
810 | if (!htab->sgot || !htab->sgotplt) | |
811 | abort (); | |
812 | ||
813 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
814 | if (htab->srelgot == NULL | |
815 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
816 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
817 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
818 | | SEC_READONLY)) | |
819 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
b34976b6 AM |
820 | return FALSE; |
821 | return TRUE; | |
0451c93c MS |
822 | } |
823 | ||
824 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
825 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
826 | hash table. */ | |
827 | ||
b34976b6 | 828 | static bfd_boolean |
0451c93c MS |
829 | elf_s390_create_dynamic_sections (dynobj, info) |
830 | bfd *dynobj; | |
831 | struct bfd_link_info *info; | |
832 | { | |
833 | struct elf_s390_link_hash_table *htab; | |
834 | ||
835 | htab = elf_s390_hash_table (info); | |
836 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 837 | return FALSE; |
0451c93c MS |
838 | |
839 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 840 | return FALSE; |
0451c93c MS |
841 | |
842 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
843 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
844 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
845 | if (!info->shared) | |
846 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
847 | ||
848 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
849 | || (!info->shared && !htab->srelbss)) | |
850 | abort (); | |
851 | ||
b34976b6 | 852 | return TRUE; |
a85d7ed0 NC |
853 | } |
854 | ||
0451c93c MS |
855 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
856 | ||
857 | static void | |
b48fa14c | 858 | elf_s390_copy_indirect_symbol (bed, dir, ind) |
9c5bfbb7 | 859 | const struct elf_backend_data *bed; |
0451c93c MS |
860 | struct elf_link_hash_entry *dir, *ind; |
861 | { | |
862 | struct elf_s390_link_hash_entry *edir, *eind; | |
863 | ||
864 | edir = (struct elf_s390_link_hash_entry *) dir; | |
865 | eind = (struct elf_s390_link_hash_entry *) ind; | |
866 | ||
867 | if (eind->dyn_relocs != NULL) | |
868 | { | |
869 | if (edir->dyn_relocs != NULL) | |
870 | { | |
871 | struct elf_s390_dyn_relocs **pp; | |
872 | struct elf_s390_dyn_relocs *p; | |
873 | ||
874 | if (ind->root.type == bfd_link_hash_indirect) | |
875 | abort (); | |
876 | ||
877 | /* Add reloc counts against the weak sym to the strong sym | |
878 | list. Merge any entries against the same section. */ | |
879 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
880 | { | |
881 | struct elf_s390_dyn_relocs *q; | |
882 | ||
883 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
884 | if (q->sec == p->sec) | |
885 | { | |
886 | q->pc_count += p->pc_count; | |
887 | q->count += p->count; | |
888 | *pp = p->next; | |
889 | break; | |
890 | } | |
891 | if (q == NULL) | |
892 | pp = &p->next; | |
893 | } | |
894 | *pp = edir->dyn_relocs; | |
895 | } | |
896 | ||
897 | edir->dyn_relocs = eind->dyn_relocs; | |
898 | eind->dyn_relocs = NULL; | |
899 | } | |
900 | ||
69fc87f1 MS |
901 | if (ind->root.type == bfd_link_hash_indirect |
902 | && dir->got.refcount <= 0) | |
903 | { | |
904 | edir->tls_type = eind->tls_type; | |
905 | eind->tls_type = GOT_UNKNOWN; | |
906 | } | |
907 | ||
64285810 MS |
908 | if (ELIMINATE_COPY_RELOCS |
909 | && ind->root.type != bfd_link_hash_indirect | |
910 | && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
911 | /* If called to transfer flags for a weakdef during processing | |
912 | of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. | |
913 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
914 | dir->elf_link_hash_flags |= | |
915 | (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC | |
916 | | ELF_LINK_HASH_REF_REGULAR | |
917 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK)); | |
918 | else | |
919 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
0451c93c | 920 | } |
a85d7ed0 | 921 | |
69fc87f1 MS |
922 | static int |
923 | elf_s390_tls_transition (info, r_type, is_local) | |
924 | struct bfd_link_info *info; | |
925 | int r_type; | |
926 | int is_local; | |
927 | { | |
928 | if (info->shared) | |
929 | return r_type; | |
930 | ||
931 | switch (r_type) | |
932 | { | |
933 | case R_390_TLS_GD32: | |
934 | case R_390_TLS_IE32: | |
935 | if (is_local) | |
936 | return R_390_TLS_LE32; | |
937 | return R_390_TLS_IE32; | |
938 | case R_390_TLS_GOTIE32: | |
939 | if (is_local) | |
940 | return R_390_TLS_LE32; | |
941 | return R_390_TLS_GOTIE32; | |
942 | case R_390_TLS_LDM32: | |
943 | return R_390_TLS_LE32; | |
944 | } | |
945 | ||
946 | return r_type; | |
947 | } | |
948 | ||
a85d7ed0 NC |
949 | /* Look through the relocs for a section during the first phase, and |
950 | allocate space in the global offset table or procedure linkage | |
951 | table. */ | |
952 | ||
b34976b6 | 953 | static bfd_boolean |
a85d7ed0 NC |
954 | elf_s390_check_relocs (abfd, info, sec, relocs) |
955 | bfd *abfd; | |
956 | struct bfd_link_info *info; | |
957 | asection *sec; | |
958 | const Elf_Internal_Rela *relocs; | |
959 | { | |
0451c93c | 960 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
961 | Elf_Internal_Shdr *symtab_hdr; |
962 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
963 | const Elf_Internal_Rela *rel; |
964 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 965 | asection *sreloc; |
5236c819 | 966 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 967 | int tls_type, old_tls_type; |
a85d7ed0 | 968 | |
1049f94e | 969 | if (info->relocatable) |
b34976b6 | 970 | return TRUE; |
a85d7ed0 | 971 | |
0451c93c | 972 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
973 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
974 | sym_hashes = elf_sym_hashes (abfd); | |
5236c819 | 975 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 976 | |
a85d7ed0 NC |
977 | sreloc = NULL; |
978 | ||
979 | rel_end = relocs + sec->reloc_count; | |
980 | for (rel = relocs; rel < rel_end; rel++) | |
981 | { | |
69fc87f1 | 982 | unsigned int r_type; |
a85d7ed0 NC |
983 | unsigned long r_symndx; |
984 | struct elf_link_hash_entry *h; | |
985 | ||
986 | r_symndx = ELF32_R_SYM (rel->r_info); | |
987 | ||
0451c93c MS |
988 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
989 | { | |
990 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
991 | bfd_archive_filename (abfd), | |
992 | r_symndx); | |
b34976b6 | 993 | return FALSE; |
0451c93c MS |
994 | } |
995 | ||
a85d7ed0 NC |
996 | if (r_symndx < symtab_hdr->sh_info) |
997 | h = NULL; | |
998 | else | |
dc810e39 | 999 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
a85d7ed0 | 1000 | |
5236c819 MS |
1001 | /* Create got section and local_got_refcounts array if they |
1002 | are needed. */ | |
69fc87f1 MS |
1003 | r_type = elf_s390_tls_transition (info, |
1004 | ELF32_R_TYPE (rel->r_info), | |
1005 | h == NULL); | |
1006 | switch (r_type) | |
a85d7ed0 NC |
1007 | { |
1008 | case R_390_GOT12: | |
5236c819 | 1009 | case R_390_GOT16: |
bd1ea41b | 1010 | case R_390_GOT20: |
a85d7ed0 | 1011 | case R_390_GOT32: |
befc3abb | 1012 | case R_390_GOTENT: |
5236c819 MS |
1013 | case R_390_GOTPLT12: |
1014 | case R_390_GOTPLT16: | |
bd1ea41b | 1015 | case R_390_GOTPLT20: |
5236c819 MS |
1016 | case R_390_GOTPLT32: |
1017 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
1018 | case R_390_TLS_GD32: |
1019 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1020 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1021 | case R_390_TLS_GOTIE32: |
1022 | case R_390_TLS_IEENT: | |
1023 | case R_390_TLS_IE32: | |
1024 | case R_390_TLS_LDM32: | |
5236c819 MS |
1025 | if (h == NULL |
1026 | && local_got_refcounts == NULL) | |
a85d7ed0 | 1027 | { |
5236c819 | 1028 | bfd_size_type size; |
26e41594 | 1029 | |
5236c819 | 1030 | size = symtab_hdr->sh_info; |
69fc87f1 | 1031 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
1032 | local_got_refcounts = ((bfd_signed_vma *) |
1033 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 1034 | if (local_got_refcounts == NULL) |
5236c819 MS |
1035 | return FALSE; |
1036 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
1037 | elf_s390_local_got_tls_type (abfd) |
1038 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 1039 | } |
5236c819 MS |
1040 | /* Fall through. */ |
1041 | case R_390_GOTOFF16: | |
1042 | case R_390_GOTOFF32: | |
0451c93c | 1043 | case R_390_GOTPC: |
befc3abb | 1044 | case R_390_GOTPCDBL: |
0451c93c MS |
1045 | if (htab->sgot == NULL) |
1046 | { | |
1047 | if (htab->elf.dynobj == NULL) | |
1048 | htab->elf.dynobj = abfd; | |
1049 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1050 | return FALSE; |
0451c93c | 1051 | } |
5236c819 MS |
1052 | } |
1053 | ||
69fc87f1 | 1054 | switch (r_type) |
5236c819 | 1055 | { |
5236c819 MS |
1056 | case R_390_GOTOFF16: |
1057 | case R_390_GOTOFF32: | |
1058 | case R_390_GOTPC: | |
1059 | case R_390_GOTPCDBL: | |
1060 | /* Got is created, nothing to be done. */ | |
a85d7ed0 NC |
1061 | break; |
1062 | ||
26e41594 AM |
1063 | case R_390_PLT16DBL: |
1064 | case R_390_PLT32DBL: | |
a85d7ed0 | 1065 | case R_390_PLT32: |
5236c819 MS |
1066 | case R_390_PLTOFF16: |
1067 | case R_390_PLTOFF32: | |
a85d7ed0 | 1068 | /* This symbol requires a procedure linkage table entry. We |
26e41594 AM |
1069 | actually build the entry in adjust_dynamic_symbol, |
1070 | because this might be a case of linking PIC code which is | |
1071 | never referenced by a dynamic object, in which case we | |
1072 | don't need to generate a procedure linkage table entry | |
1073 | after all. */ | |
a85d7ed0 NC |
1074 | |
1075 | /* If this is a local symbol, we resolve it directly without | |
26e41594 | 1076 | creating a procedure linkage table entry. */ |
5236c819 MS |
1077 | if (h != NULL) |
1078 | { | |
1079 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1080 | h->plt.refcount += 1; | |
1081 | } | |
1082 | break; | |
a85d7ed0 | 1083 | |
5236c819 MS |
1084 | case R_390_GOTPLT12: |
1085 | case R_390_GOTPLT16: | |
bd1ea41b | 1086 | case R_390_GOTPLT20: |
5236c819 MS |
1087 | case R_390_GOTPLT32: |
1088 | case R_390_GOTPLTENT: | |
1089 | /* This symbol requires either a procedure linkage table entry | |
1090 | or an entry in the local got. We actually build the entry | |
1091 | in adjust_dynamic_symbol because whether this is really a | |
1092 | global reference can change and with it the fact if we have | |
1093 | to create a plt entry or a local got entry. To be able to | |
1094 | make a once global symbol a local one we have to keep track | |
1095 | of the number of gotplt references that exist for this | |
1096 | symbol. */ | |
1097 | if (h != NULL) | |
1098 | { | |
1099 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
1100 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1101 | h->plt.refcount += 1; | |
1102 | } | |
1103 | else | |
1104 | local_got_refcounts[r_symndx] += 1; | |
a85d7ed0 NC |
1105 | break; |
1106 | ||
69fc87f1 MS |
1107 | case R_390_TLS_LDM32: |
1108 | htab->tls_ldm_got.refcount += 1; | |
1109 | break; | |
1110 | ||
1111 | case R_390_TLS_IE32: | |
1112 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1113 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1114 | case R_390_TLS_GOTIE32: |
1115 | case R_390_TLS_IEENT: | |
1116 | if (info->shared) | |
1117 | info->flags |= DF_STATIC_TLS; | |
ae9a127f | 1118 | /* Fall through. */ |
69fc87f1 MS |
1119 | |
1120 | case R_390_GOT12: | |
26e41594 | 1121 | case R_390_GOT16: |
bd1ea41b | 1122 | case R_390_GOT20: |
69fc87f1 MS |
1123 | case R_390_GOT32: |
1124 | case R_390_GOTENT: | |
1125 | case R_390_TLS_GD32: | |
1126 | /* This symbol requires a global offset table entry. */ | |
1127 | switch (r_type) | |
1128 | { | |
1129 | default: | |
1130 | case R_390_GOT12: | |
1131 | case R_390_GOT16: | |
bd1ea41b | 1132 | case R_390_GOT20: |
69fc87f1 MS |
1133 | case R_390_GOT32: |
1134 | case R_390_GOTENT: | |
1135 | tls_type = GOT_NORMAL; | |
1136 | break; | |
1137 | case R_390_TLS_GD32: | |
1138 | tls_type = GOT_TLS_GD; | |
1139 | break; | |
1140 | case R_390_TLS_IE32: | |
1141 | case R_390_TLS_GOTIE32: | |
1142 | tls_type = GOT_TLS_IE; | |
1143 | break; | |
1144 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1145 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1146 | case R_390_TLS_IEENT: |
1147 | tls_type = GOT_TLS_IE_NLT; | |
1148 | break; | |
1149 | } | |
1150 | ||
1151 | if (h != NULL) | |
1152 | { | |
1153 | h->got.refcount += 1; | |
1154 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1155 | } | |
1156 | else | |
1157 | { | |
1158 | local_got_refcounts[r_symndx] += 1; | |
1159 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; | |
1160 | } | |
1161 | /* If a TLS symbol is accessed using IE at least once, | |
1162 | there is no point to use dynamic model for it. */ | |
1163 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1164 | { | |
1165 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1166 | { | |
1167 | (*_bfd_error_handler) | |
1168 | (_("%s: `%s' accessed both as normal and thread local symbol"), | |
1169 | bfd_archive_filename (abfd), h->root.root.string); | |
1170 | return FALSE; | |
1171 | } | |
1172 | if (old_tls_type > tls_type) | |
1173 | tls_type = old_tls_type; | |
1174 | } | |
1175 | ||
1176 | if (old_tls_type != tls_type) | |
1177 | { | |
1178 | if (h != NULL) | |
1179 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1180 | else | |
1181 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1182 | } | |
1183 | ||
1184 | if (r_type != R_390_TLS_IE32) | |
1185 | break; | |
ae9a127f | 1186 | /* Fall through. */ |
69fc87f1 MS |
1187 | |
1188 | case R_390_TLS_LE32: | |
1189 | if (!info->shared) | |
1190 | break; | |
1191 | info->flags |= DF_STATIC_TLS; | |
ae9a127f | 1192 | /* Fall through. */ |
69fc87f1 | 1193 | |
26e41594 AM |
1194 | case R_390_8: |
1195 | case R_390_16: | |
a85d7ed0 | 1196 | case R_390_32: |
26e41594 AM |
1197 | case R_390_PC16: |
1198 | case R_390_PC16DBL: | |
befc3abb | 1199 | case R_390_PC32DBL: |
a85d7ed0 | 1200 | case R_390_PC32: |
0451c93c MS |
1201 | if (h != NULL && !info->shared) |
1202 | { | |
1203 | /* If this reloc is in a read-only section, we might | |
1204 | need a copy reloc. We can't check reliably at this | |
1205 | stage whether the section is read-only, as input | |
1206 | sections have not yet been mapped to output sections. | |
1207 | Tentatively set the flag for now, and correct in | |
1208 | adjust_dynamic_symbol. */ | |
1209 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
ec338859 | 1210 | |
0451c93c MS |
1211 | /* We may need a .plt entry if the function this reloc |
1212 | refers to is in a shared lib. */ | |
1213 | h->plt.refcount += 1; | |
1214 | } | |
a85d7ed0 NC |
1215 | |
1216 | /* If we are creating a shared library, and this is a reloc | |
0451c93c MS |
1217 | against a global symbol, or a non PC relative reloc |
1218 | against a local symbol, then we need to copy the reloc | |
1219 | into the shared library. However, if we are linking with | |
1220 | -Bsymbolic, we do not need to copy a reloc against a | |
1221 | global symbol which is defined in an object we are | |
1222 | including in the link (i.e., DEF_REGULAR is set). At | |
1223 | this point we have not seen all the input files, so it is | |
1224 | possible that DEF_REGULAR is not set now but will be set | |
1225 | later (it is never cleared). In case of a weak definition, | |
1226 | DEF_REGULAR may be cleared later by a strong definition in | |
1227 | a shared library. We account for that possibility below by | |
1228 | storing information in the relocs_copied field of the hash | |
1229 | table entry. A similar situation occurs when creating | |
1230 | shared libraries and symbol visibility changes render the | |
1231 | symbol local. | |
1232 | ||
1233 | If on the other hand, we are creating an executable, we | |
1234 | may need to keep relocations for symbols satisfied by a | |
1235 | dynamic library if we manage to avoid copy relocs for the | |
1236 | symbol. */ | |
1237 | if ((info->shared | |
1238 | && (sec->flags & SEC_ALLOC) != 0 | |
ec338859 | 1239 | && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 |
0451c93c | 1240 | && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL |
befc3abb | 1241 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL |
0451c93c MS |
1242 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32) |
1243 | || (h != NULL | |
1244 | && (! info->symbolic | |
1245 | || h->root.type == bfd_link_hash_defweak | |
1246 | || (h->elf_link_hash_flags | |
1247 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
64285810 MS |
1248 | || (ELIMINATE_COPY_RELOCS |
1249 | && !info->shared | |
0451c93c MS |
1250 | && (sec->flags & SEC_ALLOC) != 0 |
1251 | && h != NULL | |
1252 | && (h->root.type == bfd_link_hash_defweak | |
1253 | || (h->elf_link_hash_flags | |
1254 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
a85d7ed0 | 1255 | { |
ec338859 AM |
1256 | struct elf_s390_dyn_relocs *p; |
1257 | struct elf_s390_dyn_relocs **head; | |
1258 | ||
0451c93c MS |
1259 | /* We must copy these reloc types into the output file. |
1260 | Create a reloc section in dynobj and make room for | |
1261 | this reloc. */ | |
a85d7ed0 NC |
1262 | if (sreloc == NULL) |
1263 | { | |
1264 | const char *name; | |
0451c93c | 1265 | bfd *dynobj; |
ec338859 | 1266 | |
a85d7ed0 NC |
1267 | name = (bfd_elf_string_from_elf_section |
1268 | (abfd, | |
1269 | elf_elfheader (abfd)->e_shstrndx, | |
1270 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1271 | if (name == NULL) | |
b34976b6 | 1272 | return FALSE; |
a85d7ed0 | 1273 | |
0451c93c MS |
1274 | if (strncmp (name, ".rela", 5) != 0 |
1275 | || strcmp (bfd_get_section_name (abfd, sec), | |
1276 | name + 5) != 0) | |
1277 | { | |
1278 | (*_bfd_error_handler) | |
1279 | (_("%s: bad relocation section name `%s\'"), | |
1280 | bfd_archive_filename (abfd), name); | |
1281 | } | |
1282 | ||
1283 | if (htab->elf.dynobj == NULL) | |
1284 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1285 | |
0451c93c | 1286 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
1287 | sreloc = bfd_get_section_by_name (dynobj, name); |
1288 | if (sreloc == NULL) | |
1289 | { | |
1290 | flagword flags; | |
1291 | ||
1292 | sreloc = bfd_make_section (dynobj, name); | |
1293 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1294 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1295 | if ((sec->flags & SEC_ALLOC) != 0) | |
1296 | flags |= SEC_ALLOC | SEC_LOAD; | |
1297 | if (sreloc == NULL | |
1298 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
1299 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
b34976b6 | 1300 | return FALSE; |
a85d7ed0 | 1301 | } |
0451c93c | 1302 | elf_section_data (sec)->sreloc = sreloc; |
a85d7ed0 NC |
1303 | } |
1304 | ||
0451c93c MS |
1305 | /* If this is a global symbol, we count the number of |
1306 | relocations we need for this symbol. */ | |
1307 | if (h != NULL) | |
a85d7ed0 | 1308 | { |
ec338859 | 1309 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1310 | } |
1311 | else | |
1312 | { | |
ec338859 AM |
1313 | /* Track dynamic relocs needed for local syms too. |
1314 | We really need local syms available to do this | |
1315 | easily. Oh well. */ | |
ec338859 | 1316 | asection *s; |
ae9a127f | 1317 | |
ec338859 AM |
1318 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
1319 | sec, r_symndx); | |
1320 | if (s == NULL) | |
b34976b6 | 1321 | return FALSE; |
ec338859 AM |
1322 | |
1323 | head = ((struct elf_s390_dyn_relocs **) | |
1324 | &elf_section_data (s)->local_dynrel); | |
1325 | } | |
1326 | ||
1327 | p = *head; | |
1328 | if (p == NULL || p->sec != sec) | |
1329 | { | |
1330 | bfd_size_type amt = sizeof *p; | |
ae9a127f | 1331 | |
ec338859 AM |
1332 | p = ((struct elf_s390_dyn_relocs *) |
1333 | bfd_alloc (htab->elf.dynobj, amt)); | |
1334 | if (p == NULL) | |
b34976b6 | 1335 | return FALSE; |
ec338859 AM |
1336 | p->next = *head; |
1337 | *head = p; | |
1338 | p->sec = sec; | |
1339 | p->count = 0; | |
1340 | p->pc_count = 0; | |
a85d7ed0 | 1341 | } |
ec338859 AM |
1342 | |
1343 | p->count += 1; | |
1344 | if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 | |
1345 | || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL | |
befc3abb | 1346 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL |
ec338859 AM |
1347 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32) |
1348 | p->pc_count += 1; | |
a85d7ed0 | 1349 | } |
a85d7ed0 | 1350 | break; |
ec338859 | 1351 | |
a85d7ed0 NC |
1352 | /* This relocation describes the C++ object vtable hierarchy. |
1353 | Reconstruct it for later use during GC. */ | |
26e41594 AM |
1354 | case R_390_GNU_VTINHERIT: |
1355 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1356 | return FALSE; | |
1357 | break; | |
ec338859 | 1358 | |
a85d7ed0 NC |
1359 | /* This relocation describes which C++ vtable entries are actually |
1360 | used. Record for later use during GC. */ | |
26e41594 AM |
1361 | case R_390_GNU_VTENTRY: |
1362 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1363 | return FALSE; | |
1364 | break; | |
ec338859 | 1365 | |
a85d7ed0 NC |
1366 | default: |
1367 | break; | |
1368 | } | |
1369 | } | |
1370 | ||
b34976b6 | 1371 | return TRUE; |
a85d7ed0 NC |
1372 | } |
1373 | ||
1374 | /* Return the section that should be marked against GC for a given | |
1375 | relocation. */ | |
1376 | ||
1377 | static asection * | |
1e2f5b6e AM |
1378 | elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
1379 | asection *sec; | |
a85d7ed0 NC |
1380 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1381 | Elf_Internal_Rela *rel; | |
1382 | struct elf_link_hash_entry *h; | |
1383 | Elf_Internal_Sym *sym; | |
1384 | { | |
1385 | if (h != NULL) | |
1386 | { | |
1387 | switch (ELF32_R_TYPE (rel->r_info)) | |
1388 | { | |
1389 | case R_390_GNU_VTINHERIT: | |
1390 | case R_390_GNU_VTENTRY: | |
1391 | break; | |
1392 | ||
1393 | default: | |
1394 | switch (h->root.type) | |
1395 | { | |
1396 | case bfd_link_hash_defined: | |
1397 | case bfd_link_hash_defweak: | |
1398 | return h->root.u.def.section; | |
1399 | ||
1400 | case bfd_link_hash_common: | |
1401 | return h->root.u.c.p->section; | |
1402 | ||
1403 | default: | |
1404 | break; | |
1405 | } | |
1406 | } | |
1407 | } | |
1408 | else | |
1e2f5b6e | 1409 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
a85d7ed0 NC |
1410 | |
1411 | return NULL; | |
1412 | } | |
1413 | ||
1414 | /* Update the got entry reference counts for the section being removed. */ | |
1415 | ||
b34976b6 | 1416 | static bfd_boolean |
a85d7ed0 | 1417 | elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
0451c93c MS |
1418 | bfd *abfd; |
1419 | struct bfd_link_info *info; | |
1420 | asection *sec; | |
1421 | const Elf_Internal_Rela *relocs; | |
a85d7ed0 NC |
1422 | { |
1423 | Elf_Internal_Shdr *symtab_hdr; | |
1424 | struct elf_link_hash_entry **sym_hashes; | |
1425 | bfd_signed_vma *local_got_refcounts; | |
1426 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1427 | |
ec338859 | 1428 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1429 | |
0451c93c MS |
1430 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1431 | sym_hashes = elf_sym_hashes (abfd); | |
1432 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1433 | |
1434 | relend = relocs + sec->reloc_count; | |
1435 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1436 | { |
26e41594 AM |
1437 | unsigned long r_symndx; |
1438 | unsigned int r_type; | |
1439 | struct elf_link_hash_entry *h = NULL; | |
1440 | ||
5236c819 | 1441 | r_symndx = ELF32_R_SYM (rel->r_info); |
26e41594 AM |
1442 | if (r_symndx >= symtab_hdr->sh_info) |
1443 | { | |
1444 | struct elf_s390_link_hash_entry *eh; | |
1445 | struct elf_s390_dyn_relocs **pp; | |
1446 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1447 | |
26e41594 AM |
1448 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1449 | eh = (struct elf_s390_link_hash_entry *) h; | |
5236c819 | 1450 | |
26e41594 AM |
1451 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1452 | if (p->sec == sec) | |
1453 | { | |
1454 | /* Everything must go for SEC. */ | |
1455 | *pp = p->next; | |
1456 | break; | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | r_type = ELF32_R_TYPE (rel->r_info); | |
1461 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1462 | switch (r_type) |
5236c819 | 1463 | { |
69fc87f1 MS |
1464 | case R_390_TLS_LDM32: |
1465 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1466 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1467 | break; | |
1468 | ||
1469 | case R_390_TLS_GD32: | |
1470 | case R_390_TLS_IE32: | |
1471 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1472 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1473 | case R_390_TLS_GOTIE32: |
1474 | case R_390_TLS_IEENT: | |
5236c819 MS |
1475 | case R_390_GOT12: |
1476 | case R_390_GOT16: | |
bd1ea41b | 1477 | case R_390_GOT20: |
5236c819 MS |
1478 | case R_390_GOT32: |
1479 | case R_390_GOTOFF16: | |
1480 | case R_390_GOTOFF32: | |
1481 | case R_390_GOTPC: | |
1482 | case R_390_GOTPCDBL: | |
1483 | case R_390_GOTENT: | |
1484 | if (h != NULL) | |
1485 | { | |
1486 | if (h->got.refcount > 0) | |
1487 | h->got.refcount -= 1; | |
1488 | } | |
1489 | else if (local_got_refcounts != NULL) | |
1490 | { | |
1491 | if (local_got_refcounts[r_symndx] > 0) | |
1492 | local_got_refcounts[r_symndx] -= 1; | |
1493 | } | |
26e41594 | 1494 | break; |
a85d7ed0 | 1495 | |
5236c819 MS |
1496 | case R_390_8: |
1497 | case R_390_12: | |
1498 | case R_390_16: | |
bd1ea41b | 1499 | case R_390_20: |
5236c819 MS |
1500 | case R_390_32: |
1501 | case R_390_PC16: | |
1502 | case R_390_PC16DBL: | |
1503 | case R_390_PC32DBL: | |
1504 | case R_390_PC32: | |
26e41594 AM |
1505 | if (info->shared) |
1506 | break; | |
1507 | /* Fall through. */ | |
1508 | ||
69fc87f1 MS |
1509 | case R_390_PLT16DBL: |
1510 | case R_390_PLT32DBL: | |
1511 | case R_390_PLT32: | |
1512 | case R_390_PLTOFF16: | |
1513 | case R_390_PLTOFF32: | |
1514 | if (h != NULL) | |
1515 | { | |
1516 | if (h->plt.refcount > 0) | |
1517 | h->plt.refcount -= 1; | |
1518 | } | |
1519 | break; | |
1520 | ||
1521 | case R_390_GOTPLT12: | |
1522 | case R_390_GOTPLT16: | |
bd1ea41b | 1523 | case R_390_GOTPLT20: |
69fc87f1 MS |
1524 | case R_390_GOTPLT32: |
1525 | case R_390_GOTPLTENT: | |
1526 | if (h != NULL) | |
1527 | { | |
1528 | if (h->plt.refcount > 0) | |
1529 | { | |
1530 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1531 | h->plt.refcount -= 1; | |
1532 | } | |
1533 | } | |
1534 | else if (local_got_refcounts != NULL) | |
1535 | { | |
1536 | if (local_got_refcounts[r_symndx] > 0) | |
1537 | local_got_refcounts[r_symndx] -= 1; | |
1538 | } | |
1539 | break; | |
1540 | ||
5236c819 MS |
1541 | default: |
1542 | break; | |
1543 | } | |
1544 | } | |
a85d7ed0 | 1545 | |
b34976b6 | 1546 | return TRUE; |
a85d7ed0 NC |
1547 | } |
1548 | ||
5236c819 MS |
1549 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1550 | entry but we found we will not create any. Called when we find we will | |
1551 | not have any PLT for this symbol, by for example | |
1552 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1553 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1554 | created (we're only linking static objects). */ | |
1555 | ||
1556 | static void | |
1557 | elf_s390_adjust_gotplt (h) | |
1558 | struct elf_s390_link_hash_entry *h; | |
1559 | { | |
1560 | if (h->elf.root.type == bfd_link_hash_warning) | |
1561 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1562 | ||
1563 | if (h->gotplt_refcount <= 0) | |
1564 | return; | |
1565 | ||
1566 | /* We simply add the number of gotplt references to the number | |
1567 | * of got references for this symbol. */ | |
1568 | h->elf.got.refcount += h->gotplt_refcount; | |
1569 | h->gotplt_refcount = -1; | |
1570 | } | |
1571 | ||
a85d7ed0 NC |
1572 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1573 | regular object. The current definition is in some section of the | |
1574 | dynamic object, but we're not including those sections. We have to | |
1575 | change the definition to something the rest of the link can | |
1576 | understand. */ | |
1577 | ||
b34976b6 | 1578 | static bfd_boolean |
a85d7ed0 NC |
1579 | elf_s390_adjust_dynamic_symbol (info, h) |
1580 | struct bfd_link_info *info; | |
1581 | struct elf_link_hash_entry *h; | |
1582 | { | |
0451c93c | 1583 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1584 | asection *s; |
1585 | unsigned int power_of_two; | |
1586 | ||
a85d7ed0 NC |
1587 | /* If this is a function, put it in the procedure linkage table. We |
1588 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1589 | (although we could actually do it here). */ |
a85d7ed0 NC |
1590 | if (h->type == STT_FUNC |
1591 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1592 | { | |
0451c93c MS |
1593 | if (h->plt.refcount <= 0 |
1594 | || (! info->shared | |
1595 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
f9cd9119 MS |
1596 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
1597 | && h->root.type != bfd_link_hash_undefweak | |
1598 | && h->root.type != bfd_link_hash_undefined)) | |
a85d7ed0 NC |
1599 | { |
1600 | /* This case can occur if we saw a PLT32 reloc in an input | |
26e41594 AM |
1601 | file, but the symbol was never referred to by a dynamic |
1602 | object, or if all references were garbage collected. In | |
a85d7ed0 NC |
1603 | such a case, we don't actually need to build a procedure |
1604 | linkage table, and we can just do a PC32 reloc instead. */ | |
1605 | h->plt.offset = (bfd_vma) -1; | |
1606 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1607 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1608 | } |
1609 | ||
b34976b6 | 1610 | return TRUE; |
a85d7ed0 | 1611 | } |
bbd7ec4a | 1612 | else |
0451c93c MS |
1613 | /* It's possible that we incorrectly decided a .plt reloc was |
1614 | needed for an R_390_PC32 reloc to a non-function sym in | |
1615 | check_relocs. We can't decide accurately between function and | |
1616 | non-function syms in check-relocs; Objects loaded later in | |
1617 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1618 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1619 | |
1620 | /* If this is a weak symbol, and there is a real definition, the | |
1621 | processor independent code will have arranged for us to see the | |
1622 | real definition first, and we can just use the same value. */ | |
1623 | if (h->weakdef != NULL) | |
1624 | { | |
1625 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1626 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1627 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1628 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
64285810 MS |
1629 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
1630 | h->elf_link_hash_flags | |
1631 | = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) | |
1632 | | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); | |
b34976b6 | 1633 | return TRUE; |
a85d7ed0 NC |
1634 | } |
1635 | ||
1636 | /* This is a reference to a symbol defined by a dynamic object which | |
1637 | is not a function. */ | |
1638 | ||
1639 | /* If we are creating a shared library, we must presume that the | |
1640 | only references to the symbol are via the global offset table. | |
1641 | For such cases we need not do anything here; the relocations will | |
1642 | be handled correctly by relocate_section. */ | |
1643 | if (info->shared) | |
b34976b6 | 1644 | return TRUE; |
a85d7ed0 NC |
1645 | |
1646 | /* If there are no references to this symbol that do not use the | |
1647 | GOT, we don't need to generate a copy reloc. */ | |
1648 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
b34976b6 | 1649 | return TRUE; |
a85d7ed0 | 1650 | |
0451c93c MS |
1651 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1652 | if (info->nocopyreloc) | |
1653 | { | |
1654 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1655 | return TRUE; |
0451c93c MS |
1656 | } |
1657 | ||
64285810 | 1658 | if (ELIMINATE_COPY_RELOCS) |
0451c93c | 1659 | { |
64285810 MS |
1660 | struct elf_s390_link_hash_entry * eh; |
1661 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1662 | |
64285810 MS |
1663 | eh = (struct elf_s390_link_hash_entry *) h; |
1664 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1665 | { | |
1666 | s = p->sec->output_section; | |
1667 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1668 | break; | |
1669 | } | |
1670 | ||
1671 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1672 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1673 | if (p == NULL) | |
1674 | { | |
1675 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1676 | return TRUE; | |
1677 | } | |
0451c93c MS |
1678 | } |
1679 | ||
a85d7ed0 NC |
1680 | /* We must allocate the symbol in our .dynbss section, which will |
1681 | become part of the .bss section of the executable. There will be | |
1682 | an entry for this symbol in the .dynsym section. The dynamic | |
1683 | object will contain position independent code, so all references | |
1684 | from the dynamic object to this symbol will go through the global | |
1685 | offset table. The dynamic linker will use the .dynsym entry to | |
1686 | determine the address it must put in the global offset table, so | |
1687 | both the dynamic object and the regular object will refer to the | |
1688 | same memory location for the variable. */ | |
1689 | ||
0451c93c | 1690 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1691 | |
0451c93c MS |
1692 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1693 | copy the initial value out of the dynamic object and into the | |
1694 | runtime process image. */ | |
a85d7ed0 NC |
1695 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1696 | { | |
0451c93c | 1697 | htab->srelbss->_raw_size += sizeof (Elf32_External_Rela); |
a85d7ed0 NC |
1698 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1699 | } | |
1700 | ||
1701 | /* We need to figure out the alignment required for this symbol. I | |
1702 | have no idea how ELF linkers handle this. */ | |
1703 | power_of_two = bfd_log2 (h->size); | |
1704 | if (power_of_two > 3) | |
1705 | power_of_two = 3; | |
1706 | ||
1707 | /* Apply the required alignment. */ | |
0451c93c MS |
1708 | s = htab->sdynbss; |
1709 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
1710 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) | |
a85d7ed0 | 1711 | { |
0451c93c | 1712 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1713 | return FALSE; |
a85d7ed0 NC |
1714 | } |
1715 | ||
1716 | /* Define the symbol as being at this point in the section. */ | |
1717 | h->root.u.def.section = s; | |
1718 | h->root.u.def.value = s->_raw_size; | |
1719 | ||
1720 | /* Increment the section size to make room for the symbol. */ | |
1721 | s->_raw_size += h->size; | |
1722 | ||
b34976b6 | 1723 | return TRUE; |
a85d7ed0 NC |
1724 | } |
1725 | ||
0451c93c MS |
1726 | /* This is the condition under which elf_s390_finish_dynamic_symbol |
1727 | will be called from elflink.h. If elflink.h doesn't call our | |
1728 | finish_dynamic_symbol routine, we'll need to do something about | |
1729 | initializing any .plt and .got entries in elf_s390_relocate_section. */ | |
4ec72bde | 1730 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ |
0451c93c | 1731 | ((DYN) \ |
4ec72bde | 1732 | && ((SHARED) \ |
0451c93c MS |
1733 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
1734 | && ((H)->dynindx != -1 \ | |
1735 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1736 | ||
1737 | /* Allocate space in .plt, .got and associated reloc sections for | |
1738 | dynamic relocs. */ | |
1739 | ||
b34976b6 | 1740 | static bfd_boolean |
0451c93c MS |
1741 | allocate_dynrelocs (h, inf) |
1742 | struct elf_link_hash_entry *h; | |
1743 | PTR inf; | |
1744 | { | |
1745 | struct bfd_link_info *info; | |
1746 | struct elf_s390_link_hash_table *htab; | |
1747 | struct elf_s390_link_hash_entry *eh; | |
1748 | struct elf_s390_dyn_relocs *p; | |
1749 | ||
e92d460e | 1750 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1751 | return TRUE; |
0451c93c | 1752 | |
e92d460e | 1753 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1754 | /* When warning symbols are created, they **replace** the "real" |
1755 | entry in the hash table, thus we never get to see the real | |
1756 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1757 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1758 | ||
0451c93c MS |
1759 | info = (struct bfd_link_info *) inf; |
1760 | htab = elf_s390_hash_table (info); | |
1761 | ||
1762 | if (htab->elf.dynamic_sections_created | |
82058a73 MS |
1763 | && h->plt.refcount > 0 |
1764 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1765 | || h->root.type != bfd_link_hash_undefweak)) | |
0451c93c MS |
1766 | { |
1767 | /* Make sure this symbol is output as a dynamic symbol. | |
1768 | Undefined weak syms won't yet be marked as dynamic. */ | |
1769 | if (h->dynindx == -1 | |
1770 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1771 | { | |
1772 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1773 | return FALSE; |
0451c93c MS |
1774 | } |
1775 | ||
82058a73 | 1776 | if (info->shared |
4ec72bde | 1777 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
0451c93c MS |
1778 | { |
1779 | asection *s = htab->splt; | |
1780 | ||
1781 | /* If this is the first .plt entry, make room for the special | |
1782 | first entry. */ | |
1783 | if (s->_raw_size == 0) | |
1784 | s->_raw_size += PLT_FIRST_ENTRY_SIZE; | |
1785 | ||
1786 | h->plt.offset = s->_raw_size; | |
1787 | ||
1788 | /* If this symbol is not defined in a regular file, and we are | |
1789 | not generating a shared library, then set the symbol to this | |
1790 | location in the .plt. This is required to make function | |
1791 | pointers compare as equal between the normal executable and | |
1792 | the shared library. */ | |
1793 | if (! info->shared | |
1794 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1795 | { | |
1796 | h->root.u.def.section = s; | |
1797 | h->root.u.def.value = h->plt.offset; | |
1798 | } | |
ec338859 | 1799 | |
0451c93c MS |
1800 | /* Make room for this entry. */ |
1801 | s->_raw_size += PLT_ENTRY_SIZE; | |
ec338859 | 1802 | |
0451c93c MS |
1803 | /* We also need to make an entry in the .got.plt section, which |
1804 | will be placed in the .got section by the linker script. */ | |
1805 | htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; | |
1806 | ||
1807 | /* We also need to make an entry in the .rela.plt section. */ | |
1808 | htab->srelplt->_raw_size += sizeof (Elf32_External_Rela); | |
1809 | } | |
1810 | else | |
1811 | { | |
1812 | h->plt.offset = (bfd_vma) -1; | |
1813 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1814 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c | 1815 | } |
ec338859 | 1816 | } |
0451c93c MS |
1817 | else |
1818 | { | |
1819 | h->plt.offset = (bfd_vma) -1; | |
1820 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1821 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
ec338859 AM |
1822 | } |
1823 | ||
69fc87f1 MS |
1824 | /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to |
1825 | the binary, we can optimize a bit. IE32 and GOTIE32 get converted | |
1826 | to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT | |
1827 | we can save the dynamic TLS relocation. */ | |
1828 | if (h->got.refcount > 0 | |
1829 | && !info->shared | |
1830 | && h->dynindx == -1 | |
1831 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
0451c93c | 1832 | { |
69fc87f1 MS |
1833 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) |
1834 | /* For the GOTIE access without a literal pool entry the offset has | |
1835 | to be stored somewhere. The immediate value in the instruction | |
1836 | is not bit enough so the value is stored in the got. */ | |
1837 | { | |
1838 | h->got.offset = htab->sgot->_raw_size; | |
1839 | htab->sgot->_raw_size += GOT_ENTRY_SIZE; | |
1840 | } | |
1841 | else | |
1842 | h->got.offset = (bfd_vma) -1; | |
1843 | } | |
1844 | else if (h->got.refcount > 0) | |
1845 | { | |
0451c93c | 1846 | asection *s; |
b34976b6 | 1847 | bfd_boolean dyn; |
69fc87f1 | 1848 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1849 | |
1850 | /* Make sure this symbol is output as a dynamic symbol. | |
1851 | Undefined weak syms won't yet be marked as dynamic. */ | |
1852 | if (h->dynindx == -1 | |
1853 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1854 | { | |
1855 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1856 | return FALSE; |
0451c93c MS |
1857 | } |
1858 | ||
1859 | s = htab->sgot; | |
1860 | h->got.offset = s->_raw_size; | |
1861 | s->_raw_size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1862 | /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ |
1863 | if (tls_type == GOT_TLS_GD) | |
1864 | s->_raw_size += GOT_ENTRY_SIZE; | |
0451c93c | 1865 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1866 | /* R_390_TLS_IE32 needs one dynamic relocation, |
1867 | R_390_TLS_GD32 needs one if local symbol and two if global. */ | |
1868 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1869 | || tls_type >= GOT_TLS_IE) | |
1870 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
1871 | else if (tls_type == GOT_TLS_GD) | |
1872 | htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rela); | |
82058a73 MS |
1873 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1874 | || h->root.type != bfd_link_hash_undefweak) | |
1875 | && (info->shared | |
1876 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
0451c93c MS |
1877 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); |
1878 | } | |
1879 | else | |
1880 | h->got.offset = (bfd_vma) -1; | |
1881 | ||
1882 | eh = (struct elf_s390_link_hash_entry *) h; | |
1883 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1884 | return TRUE; |
0451c93c MS |
1885 | |
1886 | /* In the shared -Bsymbolic case, discard space allocated for | |
1887 | dynamic pc-relative relocs against symbols which turn out to be | |
1888 | defined in regular objects. For the normal shared case, discard | |
1889 | space for pc-relative relocs that have become local due to symbol | |
1890 | visibility changes. */ | |
1891 | ||
1892 | if (info->shared) | |
1893 | { | |
1894 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1895 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1896 | || info->symbolic)) | |
1897 | { | |
1898 | struct elf_s390_dyn_relocs **pp; | |
1899 | ||
1900 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1901 | { | |
1902 | p->count -= p->pc_count; | |
1903 | p->pc_count = 0; | |
1904 | if (p->count == 0) | |
1905 | *pp = p->next; | |
1906 | else | |
1907 | pp = &p->next; | |
1908 | } | |
1909 | } | |
82058a73 MS |
1910 | |
1911 | /* Also discard relocs on undefined weak syms with non-default | |
1912 | visibility. */ | |
1913 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1914 | && h->root.type == bfd_link_hash_undefweak) | |
1915 | eh->dyn_relocs = NULL; | |
0451c93c | 1916 | } |
64285810 | 1917 | else if (ELIMINATE_COPY_RELOCS) |
0451c93c MS |
1918 | { |
1919 | /* For the non-shared case, discard space for relocs against | |
1920 | symbols which turn out to need copy relocs or are not | |
1921 | dynamic. */ | |
1922 | ||
1923 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1924 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1925 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1926 | || (htab->elf.dynamic_sections_created | |
1927 | && (h->root.type == bfd_link_hash_undefweak | |
1928 | || h->root.type == bfd_link_hash_undefined)))) | |
1929 | { | |
1930 | /* Make sure this symbol is output as a dynamic symbol. | |
1931 | Undefined weak syms won't yet be marked as dynamic. */ | |
1932 | if (h->dynindx == -1 | |
1933 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1934 | { | |
1935 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1936 | return FALSE; |
0451c93c MS |
1937 | } |
1938 | ||
1939 | /* If that succeeded, we know we'll be keeping all the | |
1940 | relocs. */ | |
1941 | if (h->dynindx != -1) | |
1942 | goto keep; | |
1943 | } | |
1944 | ||
1945 | eh->dyn_relocs = NULL; | |
1946 | ||
ec338859 | 1947 | keep: ; |
0451c93c MS |
1948 | } |
1949 | ||
1950 | /* Finally, allocate space. */ | |
1951 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1952 | { | |
1953 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
ae9a127f | 1954 | |
0451c93c MS |
1955 | sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela); |
1956 | } | |
1957 | ||
b34976b6 | 1958 | return TRUE; |
0451c93c MS |
1959 | } |
1960 | ||
1961 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1962 | ||
b34976b6 | 1963 | static bfd_boolean |
0451c93c MS |
1964 | readonly_dynrelocs (h, inf) |
1965 | struct elf_link_hash_entry *h; | |
1966 | PTR inf; | |
1967 | { | |
1968 | struct elf_s390_link_hash_entry *eh; | |
1969 | struct elf_s390_dyn_relocs *p; | |
1970 | ||
e92d460e AM |
1971 | if (h->root.type == bfd_link_hash_warning) |
1972 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1973 | ||
0451c93c MS |
1974 | eh = (struct elf_s390_link_hash_entry *) h; |
1975 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1976 | { | |
1977 | asection *s = p->sec->output_section; | |
1978 | ||
1979 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1980 | { | |
1981 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1982 | ||
1983 | info->flags |= DF_TEXTREL; | |
1984 | ||
1985 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1986 | return FALSE; |
0451c93c MS |
1987 | } |
1988 | } | |
b34976b6 | 1989 | return TRUE; |
0451c93c MS |
1990 | } |
1991 | ||
a85d7ed0 NC |
1992 | /* Set the sizes of the dynamic sections. */ |
1993 | ||
b34976b6 | 1994 | static bfd_boolean |
a85d7ed0 | 1995 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1996 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1997 | struct bfd_link_info *info; |
1998 | { | |
0451c93c | 1999 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2000 | bfd *dynobj; |
2001 | asection *s; | |
b34976b6 | 2002 | bfd_boolean relocs; |
0451c93c | 2003 | bfd *ibfd; |
a85d7ed0 | 2004 | |
0451c93c MS |
2005 | htab = elf_s390_hash_table (info); |
2006 | dynobj = htab->elf.dynobj; | |
2007 | if (dynobj == NULL) | |
2008 | abort (); | |
a85d7ed0 | 2009 | |
0451c93c | 2010 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2011 | { |
2012 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2013 | if (info->executable) |
a85d7ed0 NC |
2014 | { |
2015 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
2016 | if (s == NULL) |
2017 | abort (); | |
a85d7ed0 NC |
2018 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
2019 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
2020 | } | |
2021 | } | |
a85d7ed0 | 2022 | |
0451c93c MS |
2023 | /* Set up .got offsets for local syms, and space for local dynamic |
2024 | relocs. */ | |
2025 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 2026 | { |
0451c93c MS |
2027 | bfd_signed_vma *local_got; |
2028 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 2029 | char *local_tls_type; |
0451c93c MS |
2030 | bfd_size_type locsymcount; |
2031 | Elf_Internal_Shdr *symtab_hdr; | |
2032 | asection *srela; | |
a85d7ed0 | 2033 | |
0451c93c | 2034 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
a85d7ed0 NC |
2035 | continue; |
2036 | ||
0451c93c | 2037 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 2038 | { |
ec338859 | 2039 | struct elf_s390_dyn_relocs *p; |
0451c93c | 2040 | |
ec338859 AM |
2041 | for (p = *((struct elf_s390_dyn_relocs **) |
2042 | &elf_section_data (s)->local_dynrel); | |
2043 | p != NULL; | |
2044 | p = p->next) | |
a85d7ed0 | 2045 | { |
ec338859 AM |
2046 | if (!bfd_is_abs_section (p->sec) |
2047 | && bfd_is_abs_section (p->sec->output_section)) | |
2048 | { | |
2049 | /* Input section has been discarded, either because | |
2050 | it is a copy of a linkonce section or due to | |
2051 | linker script /DISCARD/, so we'll be discarding | |
2052 | the relocs too. */ | |
2053 | } | |
248866a8 | 2054 | else if (p->count != 0) |
ec338859 AM |
2055 | { |
2056 | srela = elf_section_data (p->sec)->sreloc; | |
2057 | srela->_raw_size += p->count * sizeof (Elf32_External_Rela); | |
248866a8 AM |
2058 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2059 | info->flags |= DF_TEXTREL; | |
ec338859 | 2060 | } |
a85d7ed0 NC |
2061 | } |
2062 | } | |
0451c93c MS |
2063 | |
2064 | local_got = elf_local_got_refcounts (ibfd); | |
2065 | if (!local_got) | |
2066 | continue; | |
2067 | ||
2068 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2069 | locsymcount = symtab_hdr->sh_info; | |
2070 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 2071 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
2072 | s = htab->sgot; |
2073 | srela = htab->srelgot; | |
69fc87f1 | 2074 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 2075 | { |
0451c93c | 2076 | if (*local_got > 0) |
a85d7ed0 | 2077 | { |
0451c93c MS |
2078 | *local_got = s->_raw_size; |
2079 | s->_raw_size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
2080 | if (*local_tls_type == GOT_TLS_GD) |
2081 | s->_raw_size += GOT_ENTRY_SIZE; | |
0451c93c MS |
2082 | if (info->shared) |
2083 | srela->_raw_size += sizeof (Elf32_External_Rela); | |
a85d7ed0 NC |
2084 | } |
2085 | else | |
0451c93c MS |
2086 | *local_got = (bfd_vma) -1; |
2087 | } | |
2088 | } | |
2089 | ||
69fc87f1 MS |
2090 | if (htab->tls_ldm_got.refcount > 0) |
2091 | { | |
2092 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 | |
2093 | relocs. */ | |
2094 | htab->tls_ldm_got.offset = htab->sgot->_raw_size; | |
2095 | htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; | |
2096 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
2097 | } | |
2098 | else | |
2099 | htab->tls_ldm_got.offset = -1; | |
2100 | ||
0451c93c MS |
2101 | /* Allocate global sym .plt and .got entries, and space for global |
2102 | sym dynamic relocs. */ | |
2103 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2104 | ||
2105 | /* We now have determined the sizes of the various dynamic sections. | |
2106 | Allocate memory for them. */ | |
b34976b6 | 2107 | relocs = FALSE; |
0451c93c MS |
2108 | for (s = dynobj->sections; s != NULL; s = s->next) |
2109 | { | |
2110 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2111 | continue; | |
2112 | ||
2113 | if (s == htab->splt | |
2114 | || s == htab->sgot | |
2115 | || s == htab->sgotplt) | |
2116 | { | |
2117 | /* Strip this section if we don't need it; see the | |
2118 | comment below. */ | |
a85d7ed0 | 2119 | } |
0451c93c MS |
2120 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
2121 | { | |
a779acda | 2122 | if (s->_raw_size != 0) |
b34976b6 | 2123 | relocs = TRUE; |
ec338859 | 2124 | |
0451c93c MS |
2125 | /* We use the reloc_count field as a counter if we need |
2126 | to copy relocs into the output file. */ | |
2127 | s->reloc_count = 0; | |
2128 | } | |
2129 | else | |
a85d7ed0 NC |
2130 | { |
2131 | /* It's not one of our sections, so don't allocate space. */ | |
2132 | continue; | |
2133 | } | |
2134 | ||
0451c93c | 2135 | if (s->_raw_size == 0) |
a85d7ed0 | 2136 | { |
0451c93c MS |
2137 | /* If we don't need this section, strip it from the |
2138 | output file. This is to handle .rela.bss and | |
2139 | .rela.plt. We must create it in | |
2140 | create_dynamic_sections, because it must be created | |
2141 | before the linker maps input sections to output | |
2142 | sections. The linker does that before | |
2143 | adjust_dynamic_symbol is called, and it is that | |
2144 | function which decides whether anything needs to go | |
2145 | into these sections. */ | |
2146 | ||
a85d7ed0 NC |
2147 | _bfd_strip_section_from_output (info, s); |
2148 | continue; | |
2149 | } | |
2150 | ||
0451c93c MS |
2151 | /* Allocate memory for the section contents. We use bfd_zalloc |
2152 | here in case unused entries are not reclaimed before the | |
2153 | section's contents are written out. This should not happen, | |
2154 | but this way if it does, we get a R_390_NONE reloc instead | |
2155 | of garbage. */ | |
2156 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
2157 | if (s->contents == NULL) | |
b34976b6 | 2158 | return FALSE; |
a85d7ed0 | 2159 | } |
ec338859 | 2160 | |
0451c93c | 2161 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2162 | { |
2163 | /* Add some entries to the .dynamic section. We fill in the | |
2164 | values later, in elf_s390_finish_dynamic_sections, but we | |
2165 | must add the entries now so that we get the correct size for | |
2166 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2167 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
2168 | #define add_dynamic_entry(TAG, VAL) \ |
2169 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
ec338859 | 2170 | |
36af4a4e | 2171 | if (info->executable) |
a85d7ed0 | 2172 | { |
dc810e39 | 2173 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2174 | return FALSE; |
a85d7ed0 | 2175 | } |
ec338859 | 2176 | |
0451c93c | 2177 | if (htab->splt->_raw_size != 0) |
a85d7ed0 | 2178 | { |
dc810e39 AM |
2179 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2180 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2181 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2182 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2183 | return FALSE; |
a85d7ed0 | 2184 | } |
ec338859 | 2185 | |
a85d7ed0 | 2186 | if (relocs) |
26e41594 AM |
2187 | { |
2188 | if (!add_dynamic_entry (DT_RELA, 0) | |
2189 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2190 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 2191 | return FALSE; |
a85d7ed0 | 2192 | |
0451c93c MS |
2193 | /* If any dynamic relocs apply to a read-only section, |
2194 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2195 | if ((info->flags & DF_TEXTREL) == 0) |
2196 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2197 | (PTR) info); | |
ec338859 | 2198 | |
0451c93c MS |
2199 | if ((info->flags & DF_TEXTREL) != 0) |
2200 | { | |
2201 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2202 | return FALSE; |
0451c93c | 2203 | } |
a85d7ed0 NC |
2204 | } |
2205 | } | |
dc810e39 | 2206 | #undef add_dynamic_entry |
ec338859 | 2207 | |
b34976b6 | 2208 | return TRUE; |
a85d7ed0 NC |
2209 | } |
2210 | ||
69fc87f1 MS |
2211 | /* Return the base VMA address which should be subtracted from real addresses |
2212 | when resolving @dtpoff relocation. | |
2213 | This is PT_TLS segment p_vaddr. */ | |
2214 | ||
2215 | static bfd_vma | |
2216 | dtpoff_base (info) | |
2217 | struct bfd_link_info *info; | |
2218 | { | |
2219 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
2220 | if (elf_hash_table (info)->tls_segment == NULL) | |
2221 | return 0; | |
2222 | return elf_hash_table (info)->tls_segment->start; | |
2223 | } | |
2224 | ||
2225 | /* Return the relocation value for @tpoff relocation | |
2226 | if STT_TLS virtual address is ADDRESS. */ | |
2227 | ||
2228 | static bfd_vma | |
2229 | tpoff (info, address) | |
2230 | struct bfd_link_info *info; | |
2231 | bfd_vma address; | |
2232 | { | |
2233 | struct elf_link_tls_segment *tls_segment | |
2234 | = elf_hash_table (info)->tls_segment; | |
2235 | ||
2236 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
2237 | if (tls_segment == NULL) | |
2238 | return 0; | |
2239 | return (align_power (tls_segment->size, tls_segment->align) | |
2240 | + tls_segment->start - address); | |
2241 | } | |
2242 | ||
2243 | /* Complain if TLS instruction relocation is against an invalid | |
2244 | instruction. */ | |
2245 | ||
2246 | static void | |
2247 | invalid_tls_insn (input_bfd, input_section, rel) | |
2248 | bfd *input_bfd; | |
2249 | asection *input_section; | |
2250 | Elf_Internal_Rela *rel; | |
2251 | { | |
2252 | reloc_howto_type *howto; | |
2253 | ||
2254 | howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
2255 | (*_bfd_error_handler) | |
2256 | (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), | |
2257 | bfd_archive_filename (input_bfd), | |
2258 | bfd_get_section_name (input_bfd, input_section), | |
2259 | (long) rel->r_offset, | |
2260 | howto->name); | |
2261 | } | |
2262 | ||
a85d7ed0 NC |
2263 | /* Relocate a 390 ELF section. */ |
2264 | ||
b34976b6 | 2265 | static bfd_boolean |
a85d7ed0 NC |
2266 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2267 | contents, relocs, local_syms, local_sections) | |
2268 | bfd *output_bfd; | |
2269 | struct bfd_link_info *info; | |
2270 | bfd *input_bfd; | |
2271 | asection *input_section; | |
2272 | bfd_byte *contents; | |
2273 | Elf_Internal_Rela *relocs; | |
2274 | Elf_Internal_Sym *local_syms; | |
2275 | asection **local_sections; | |
2276 | { | |
0451c93c | 2277 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2278 | Elf_Internal_Shdr *symtab_hdr; |
2279 | struct elf_link_hash_entry **sym_hashes; | |
2280 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2281 | Elf_Internal_Rela *rel; |
2282 | Elf_Internal_Rela *relend; | |
2283 | ||
1049f94e | 2284 | if (info->relocatable) |
b34976b6 | 2285 | return TRUE; |
b491616a | 2286 | |
0451c93c | 2287 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2288 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2289 | sym_hashes = elf_sym_hashes (input_bfd); | |
2290 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2291 | ||
a85d7ed0 NC |
2292 | rel = relocs; |
2293 | relend = relocs + input_section->reloc_count; | |
2294 | for (; rel < relend; rel++) | |
2295 | { | |
5236c819 | 2296 | unsigned int r_type; |
a85d7ed0 NC |
2297 | reloc_howto_type *howto; |
2298 | unsigned long r_symndx; | |
2299 | struct elf_link_hash_entry *h; | |
2300 | Elf_Internal_Sym *sym; | |
2301 | asection *sec; | |
0451c93c | 2302 | bfd_vma off; |
a85d7ed0 | 2303 | bfd_vma relocation; |
b34976b6 | 2304 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2305 | bfd_reloc_status_type r; |
69fc87f1 | 2306 | int tls_type; |
ec338859 | 2307 | |
a85d7ed0 NC |
2308 | r_type = ELF32_R_TYPE (rel->r_info); |
2309 | if (r_type == (int) R_390_GNU_VTINHERIT | |
26e41594 AM |
2310 | || r_type == (int) R_390_GNU_VTENTRY) |
2311 | continue; | |
5236c819 | 2312 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2313 | { |
2314 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2315 | return FALSE; |
a85d7ed0 | 2316 | } |
ec338859 | 2317 | |
b491616a | 2318 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2319 | r_symndx = ELF32_R_SYM (rel->r_info); |
5236c819 MS |
2320 | |
2321 | /* This is a final link. */ | |
a85d7ed0 NC |
2322 | h = NULL; |
2323 | sym = NULL; | |
2324 | sec = NULL; | |
b34976b6 | 2325 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2326 | if (r_symndx < symtab_hdr->sh_info) |
2327 | { | |
2328 | sym = local_syms + r_symndx; | |
2329 | sec = local_sections[r_symndx]; | |
f8df10f4 | 2330 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
a85d7ed0 NC |
2331 | } |
2332 | else | |
2333 | { | |
560e09e9 | 2334 | bfd_boolean warned ATTRIBUTE_UNUSED; |
ec338859 | 2335 | |
560e09e9 NC |
2336 | RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, |
2337 | symtab_hdr, relocation, sec, | |
2338 | unresolved_reloc, info, | |
2339 | warned); | |
a85d7ed0 | 2340 | } |
ec338859 | 2341 | |
a85d7ed0 NC |
2342 | switch (r_type) |
2343 | { | |
5236c819 MS |
2344 | case R_390_GOTPLT12: |
2345 | case R_390_GOTPLT16: | |
bd1ea41b | 2346 | case R_390_GOTPLT20: |
5236c819 MS |
2347 | case R_390_GOTPLT32: |
2348 | case R_390_GOTPLTENT: | |
2349 | /* There are three cases for a GOTPLT relocation. 1) The | |
2350 | relocation is against the jump slot entry of a plt that | |
2351 | will get emitted to the output file. 2) The relocation | |
2352 | is against the jump slot of a plt entry that has been | |
2353 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2354 | as replacement. 3) The relocation is against a local symbol. | |
2355 | Cases 2) and 3) are the same as the GOT relocation code | |
2356 | so we just have to test for case 1 and fall through for | |
2357 | the other two. */ | |
2358 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2359 | { | |
2360 | bfd_vma plt_index; | |
2361 | ||
2362 | /* Calc. index no. | |
2363 | Current offset - size first entry / entry size. */ | |
2364 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2365 | PLT_ENTRY_SIZE; | |
26e41594 | 2366 | |
5236c819 MS |
2367 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2368 | addr & GOT addr. */ | |
2369 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2370 | unresolved_reloc = FALSE; | |
2371 | ||
2372 | if (r_type == R_390_GOTPLTENT) | |
2373 | relocation += htab->sgot->output_section->vma; | |
2374 | break; | |
2375 | } | |
2376 | /* Fall through. */ | |
2377 | ||
26e41594 AM |
2378 | case R_390_GOT12: |
2379 | case R_390_GOT16: | |
bd1ea41b | 2380 | case R_390_GOT20: |
26e41594 | 2381 | case R_390_GOT32: |
befc3abb | 2382 | case R_390_GOTENT: |
26e41594 AM |
2383 | /* Relocation is to the entry for this symbol in the global |
2384 | offset table. */ | |
0451c93c MS |
2385 | if (htab->sgot == NULL) |
2386 | abort (); | |
ec338859 | 2387 | |
26e41594 AM |
2388 | if (h != NULL) |
2389 | { | |
b34976b6 | 2390 | bfd_boolean dyn; |
ec338859 | 2391 | |
26e41594 | 2392 | off = h->got.offset; |
0451c93c | 2393 | dyn = htab->elf.dynamic_sections_created; |
4ec72bde | 2394 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
26e41594 AM |
2395 | || (info->shared |
2396 | && (info->symbolic | |
0451c93c MS |
2397 | || h->dynindx == -1 |
2398 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
82058a73 MS |
2399 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
2400 | || (ELF_ST_VISIBILITY (h->other) | |
2401 | && h->root.type == bfd_link_hash_undefweak)) | |
26e41594 AM |
2402 | { |
2403 | /* This is actually a static link, or it is a | |
2404 | -Bsymbolic link and the symbol is defined | |
2405 | locally, or the symbol was forced to be local | |
2406 | because of a version file. We must initialize | |
2407 | this entry in the global offset table. Since the | |
2408 | offset must always be a multiple of 2, we use the | |
2409 | least significant bit to record whether we have | |
2410 | initialized it already. | |
2411 | ||
2412 | When doing a dynamic link, we create a .rel.got | |
2413 | relocation entry to initialize the value. This | |
2414 | is done in the finish_dynamic_symbol routine. */ | |
2415 | if ((off & 1) != 0) | |
2416 | off &= ~1; | |
2417 | else | |
2418 | { | |
a85d7ed0 | 2419 | bfd_put_32 (output_bfd, relocation, |
0451c93c | 2420 | htab->sgot->contents + off); |
26e41594 AM |
2421 | h->got.offset |= 1; |
2422 | } | |
2423 | } | |
0451c93c | 2424 | else |
b34976b6 | 2425 | unresolved_reloc = FALSE; |
26e41594 AM |
2426 | } |
2427 | else | |
2428 | { | |
0451c93c MS |
2429 | if (local_got_offsets == NULL) |
2430 | abort (); | |
a85d7ed0 | 2431 | |
26e41594 | 2432 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2433 | |
26e41594 AM |
2434 | /* The offset must always be a multiple of 4. We use |
2435 | the least significant bit to record whether we have | |
2436 | already generated the necessary reloc. */ | |
2437 | if ((off & 1) != 0) | |
2438 | off &= ~1; | |
2439 | else | |
2440 | { | |
2441 | bfd_put_32 (output_bfd, relocation, | |
0451c93c | 2442 | htab->sgot->contents + off); |
a85d7ed0 | 2443 | |
26e41594 AM |
2444 | if (info->shared) |
2445 | { | |
2446 | asection *srelgot; | |
2447 | Elf_Internal_Rela outrel; | |
947216bf | 2448 | bfd_byte *loc; |
a85d7ed0 | 2449 | |
26e41594 | 2450 | srelgot = htab->srelgot; |
0451c93c MS |
2451 | if (srelgot == NULL) |
2452 | abort (); | |
a85d7ed0 | 2453 | |
26e41594 AM |
2454 | outrel.r_offset = (htab->sgot->output_section->vma |
2455 | + htab->sgot->output_offset | |
2456 | + off); | |
2457 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2458 | outrel.r_addend = relocation; |
947216bf AM |
2459 | loc = srelgot->contents; |
2460 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
26e41594 AM |
2461 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
2462 | } | |
a85d7ed0 | 2463 | |
26e41594 AM |
2464 | local_got_offsets[r_symndx] |= 1; |
2465 | } | |
2466 | } | |
a85d7ed0 | 2467 | |
0451c93c MS |
2468 | if (off >= (bfd_vma) -2) |
2469 | abort (); | |
a85d7ed0 | 2470 | |
0451c93c | 2471 | relocation = htab->sgot->output_offset + off; |
befc3abb | 2472 | |
ae9a127f NC |
2473 | /* For @GOTENT the relocation is against the offset between |
2474 | the instruction and the symbols entry in the GOT and not | |
2475 | between the start of the GOT and the symbols entry. We | |
2476 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2477 | if ( r_type == R_390_GOTENT |
2478 | || r_type == R_390_GOTPLTENT) | |
befc3abb MS |
2479 | relocation += htab->sgot->output_section->vma; |
2480 | ||
26e41594 | 2481 | break; |
dc810e39 | 2482 | |
5236c819 | 2483 | case R_390_GOTOFF16: |
26e41594 AM |
2484 | case R_390_GOTOFF32: |
2485 | /* Relocation is relative to the start of the global offset | |
2486 | table. */ | |
2487 | ||
2488 | /* Note that sgot->output_offset is not involved in this | |
2489 | calculation. We always want the start of .got. If we | |
2490 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2491 | permitted by the ABI, we might have to change this | |
2492 | calculation. */ | |
2493 | relocation -= htab->sgot->output_section->vma; | |
2494 | break; | |
2495 | ||
2496 | case R_390_GOTPC: | |
befc3abb | 2497 | case R_390_GOTPCDBL: |
26e41594 AM |
2498 | /* Use global offset table as symbol value. */ |
2499 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2500 | unresolved_reloc = FALSE; |
26e41594 | 2501 | break; |
a85d7ed0 | 2502 | |
26e41594 AM |
2503 | case R_390_PLT16DBL: |
2504 | case R_390_PLT32DBL: | |
2505 | case R_390_PLT32: | |
2506 | /* Relocation is to the entry for this symbol in the | |
2507 | procedure linkage table. */ | |
a85d7ed0 | 2508 | |
26e41594 AM |
2509 | /* Resolve a PLT32 reloc against a local symbol directly, |
2510 | without using the procedure linkage table. */ | |
2511 | if (h == NULL) | |
2512 | break; | |
a85d7ed0 | 2513 | |
26e41594 | 2514 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2515 | || htab->splt == NULL) |
26e41594 AM |
2516 | { |
2517 | /* We didn't make a PLT entry for this symbol. This | |
2518 | happens when statically linking PIC code, or when | |
2519 | using -Bsymbolic. */ | |
2520 | break; | |
2521 | } | |
2522 | ||
2523 | relocation = (htab->splt->output_section->vma | |
2524 | + htab->splt->output_offset | |
2525 | + h->plt.offset); | |
b34976b6 | 2526 | unresolved_reloc = FALSE; |
26e41594 | 2527 | break; |
a85d7ed0 | 2528 | |
5236c819 MS |
2529 | case R_390_PLTOFF16: |
2530 | case R_390_PLTOFF32: | |
26e41594 AM |
2531 | /* Relocation is to the entry for this symbol in the |
2532 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2533 | |
2534 | /* For local symbols or if we didn't make a PLT entry for | |
2535 | this symbol resolve the symbol directly. */ | |
26e41594 | 2536 | if ( h == NULL |
5236c819 MS |
2537 | || h->plt.offset == (bfd_vma) -1 |
2538 | || htab->splt == NULL) | |
2539 | { | |
2540 | relocation -= htab->sgot->output_section->vma; | |
2541 | break; | |
2542 | } | |
2543 | ||
26e41594 AM |
2544 | relocation = (htab->splt->output_section->vma |
2545 | + htab->splt->output_offset | |
2546 | + h->plt.offset | |
5236c819 MS |
2547 | - htab->sgot->output_section->vma); |
2548 | unresolved_reloc = FALSE; | |
26e41594 AM |
2549 | break; |
2550 | ||
2551 | case R_390_8: | |
2552 | case R_390_16: | |
2553 | case R_390_32: | |
2554 | case R_390_PC16: | |
2555 | case R_390_PC16DBL: | |
2556 | case R_390_PC32DBL: | |
2557 | case R_390_PC32: | |
ec338859 AM |
2558 | /* r_symndx will be zero only for relocs against symbols |
2559 | from removed linkonce sections, or sections discarded by | |
2560 | a linker script. */ | |
26e41594 AM |
2561 | if (r_symndx == 0 |
2562 | || (input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
2563 | break; |
2564 | ||
26e41594 | 2565 | if ((info->shared |
82058a73 MS |
2566 | && (h == NULL |
2567 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2568 | || h->root.type != bfd_link_hash_undefweak) | |
0451c93c MS |
2569 | && ((r_type != R_390_PC16 |
2570 | && r_type != R_390_PC16DBL | |
befc3abb | 2571 | && r_type != R_390_PC32DBL |
0451c93c MS |
2572 | && r_type != R_390_PC32) |
2573 | || (h != NULL | |
2574 | && h->dynindx != -1 | |
2575 | && (! info->symbolic | |
2576 | || (h->elf_link_hash_flags | |
2577 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
64285810 MS |
2578 | || (ELIMINATE_COPY_RELOCS |
2579 | && !info->shared | |
0451c93c MS |
2580 | && h != NULL |
2581 | && h->dynindx != -1 | |
2582 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
2583 | && (((h->elf_link_hash_flags | |
2584 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2585 | && (h->elf_link_hash_flags | |
2586 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2587 | || h->root.type == bfd_link_hash_undefweak | |
2588 | || h->root.type == bfd_link_hash_undefined))) | |
26e41594 AM |
2589 | { |
2590 | Elf_Internal_Rela outrel; | |
2591 | bfd_boolean skip, relocate; | |
0451c93c | 2592 | asection *sreloc; |
947216bf | 2593 | bfd_byte *loc; |
ec338859 | 2594 | |
0451c93c MS |
2595 | /* When generating a shared object, these relocations |
2596 | are copied into the output file to be resolved at run | |
2597 | time. */ | |
ec338859 | 2598 | |
26e41594 AM |
2599 | skip = FALSE; |
2600 | relocate = FALSE; | |
ec338859 | 2601 | |
c629eae0 JJ |
2602 | outrel.r_offset = |
2603 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2604 | rel->r_offset); | |
2605 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2606 | skip = TRUE; |
0bb2d96a | 2607 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2608 | skip = TRUE, relocate = TRUE; |
26e41594 AM |
2609 | outrel.r_offset += (input_section->output_section->vma |
2610 | + input_section->output_offset); | |
ec338859 | 2611 | |
26e41594 | 2612 | if (skip) |
0bb2d96a | 2613 | memset (&outrel, 0, sizeof outrel); |
26e41594 | 2614 | else if (h != NULL |
0451c93c MS |
2615 | && h->dynindx != -1 |
2616 | && (r_type == R_390_PC16 | |
2617 | || r_type == R_390_PC16DBL | |
befc3abb | 2618 | || r_type == R_390_PC32DBL |
0451c93c MS |
2619 | || r_type == R_390_PC32 |
2620 | || !info->shared | |
2621 | || !info->symbolic | |
2622 | || (h->elf_link_hash_flags | |
2623 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
26e41594 AM |
2624 | { |
2625 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
27018c3f | 2626 | outrel.r_addend = rel->r_addend; |
26e41594 AM |
2627 | } |
2628 | else | |
2629 | { | |
0451c93c | 2630 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 2631 | relocate = TRUE; |
0451c93c MS |
2632 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); |
2633 | outrel.r_addend = relocation + rel->r_addend; | |
26e41594 | 2634 | } |
ec338859 | 2635 | |
0451c93c MS |
2636 | sreloc = elf_section_data (input_section)->sreloc; |
2637 | if (sreloc == NULL) | |
2638 | abort (); | |
ec338859 | 2639 | |
947216bf AM |
2640 | loc = sreloc->contents; |
2641 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 2642 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
ec338859 | 2643 | |
26e41594 AM |
2644 | /* If this reloc is against an external symbol, we do |
2645 | not want to fiddle with the addend. Otherwise, we | |
2646 | need to include the symbol value so that it becomes | |
2647 | an addend for the dynamic reloc. */ | |
2648 | if (! relocate) | |
2649 | continue; | |
2650 | } | |
0451c93c | 2651 | break; |
ec338859 | 2652 | |
69fc87f1 MS |
2653 | /* Relocations for tls literal pool entries. */ |
2654 | case R_390_TLS_IE32: | |
2655 | if (info->shared) | |
2656 | { | |
2657 | Elf_Internal_Rela outrel; | |
2658 | asection *sreloc; | |
2659 | bfd_byte *loc; | |
2660 | ||
2661 | outrel.r_offset = rel->r_offset | |
2662 | + input_section->output_section->vma | |
2663 | + input_section->output_offset; | |
2664 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
2665 | sreloc = elf_section_data (input_section)->sreloc; | |
2666 | if (sreloc == NULL) | |
2667 | abort (); | |
2668 | loc = sreloc->contents; | |
2669 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2670 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
2671 | } | |
ae9a127f | 2672 | /* Fall through. */ |
69fc87f1 MS |
2673 | |
2674 | case R_390_TLS_GD32: | |
2675 | case R_390_TLS_GOTIE32: | |
2676 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2677 | tls_type = GOT_UNKNOWN; | |
2678 | if (h == NULL && local_got_offsets) | |
2679 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2680 | else if (h != NULL) | |
2681 | { | |
2682 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2683 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2684 | r_type = R_390_TLS_LE32; | |
2685 | } | |
2686 | if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) | |
2687 | r_type = R_390_TLS_IE32; | |
2688 | ||
2689 | if (r_type == R_390_TLS_LE32) | |
2690 | { | |
2691 | /* This relocation gets optimized away by the local exec | |
2692 | access optimization. */ | |
2693 | BFD_ASSERT (! unresolved_reloc); | |
2694 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2695 | contents + rel->r_offset); | |
2696 | continue; | |
2697 | } | |
2698 | ||
2699 | if (htab->sgot == NULL) | |
2700 | abort (); | |
2701 | ||
2702 | if (h != NULL) | |
2703 | off = h->got.offset; | |
2704 | else | |
2705 | { | |
2706 | if (local_got_offsets == NULL) | |
2707 | abort (); | |
2708 | ||
2709 | off = local_got_offsets[r_symndx]; | |
2710 | } | |
2711 | ||
2712 | emit_tls_relocs: | |
2713 | ||
2714 | if ((off & 1) != 0) | |
2715 | off &= ~1; | |
26e41594 | 2716 | else |
69fc87f1 MS |
2717 | { |
2718 | Elf_Internal_Rela outrel; | |
2719 | bfd_byte *loc; | |
2720 | int dr_type, indx; | |
2721 | ||
2722 | if (htab->srelgot == NULL) | |
2723 | abort (); | |
2724 | ||
2725 | outrel.r_offset = (htab->sgot->output_section->vma | |
2726 | + htab->sgot->output_offset + off); | |
2727 | ||
2728 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2729 | if (r_type == R_390_TLS_GD32) | |
2730 | dr_type = R_390_TLS_DTPMOD; | |
2731 | else | |
2732 | dr_type = R_390_TLS_TPOFF; | |
2733 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2734 | outrel.r_addend = relocation - dtpoff_base (info); | |
2735 | else | |
2736 | outrel.r_addend = 0; | |
2737 | outrel.r_info = ELF32_R_INFO (indx, dr_type); | |
2738 | loc = htab->srelgot->contents; | |
2739 | loc += htab->srelgot->reloc_count++ | |
2740 | * sizeof (Elf32_External_Rela); | |
2741 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2742 | ||
2743 | if (r_type == R_390_TLS_GD32) | |
2744 | { | |
2745 | if (indx == 0) | |
2746 | { | |
26e41594 | 2747 | BFD_ASSERT (! unresolved_reloc); |
69fc87f1 MS |
2748 | bfd_put_32 (output_bfd, |
2749 | relocation - dtpoff_base (info), | |
2750 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2751 | } | |
2752 | else | |
2753 | { | |
2754 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); | |
2755 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2756 | outrel.r_addend = 0; | |
2757 | htab->srelgot->reloc_count++; | |
2758 | loc += sizeof (Elf32_External_Rela); | |
2759 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2760 | } | |
2761 | } | |
2762 | ||
2763 | if (h != NULL) | |
2764 | h->got.offset |= 1; | |
2765 | else | |
2766 | local_got_offsets[r_symndx] |= 1; | |
2767 | } | |
2768 | ||
2769 | if (off >= (bfd_vma) -2) | |
2770 | abort (); | |
2771 | if (r_type == ELF32_R_TYPE (rel->r_info)) | |
2772 | { | |
2773 | relocation = htab->sgot->output_offset + off; | |
2774 | if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) | |
2775 | relocation += htab->sgot->output_section->vma; | |
2776 | unresolved_reloc = FALSE; | |
2777 | } | |
2778 | else | |
2779 | { | |
2780 | bfd_put_32 (output_bfd, htab->sgot->output_offset + off, | |
2781 | contents + rel->r_offset); | |
2782 | continue; | |
2783 | } | |
2784 | break; | |
2785 | ||
2786 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 2787 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
2788 | case R_390_TLS_IEENT: |
2789 | if (h == NULL) | |
2790 | { | |
2791 | if (local_got_offsets == NULL) | |
2792 | abort(); | |
2793 | off = local_got_offsets[r_symndx]; | |
2794 | if (info->shared) | |
2795 | goto emit_tls_relocs; | |
2796 | } | |
2797 | else | |
2798 | { | |
2799 | off = h->got.offset; | |
2800 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2801 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2802 | goto emit_tls_relocs; | |
2803 | } | |
2804 | ||
2805 | if (htab->sgot == NULL) | |
2806 | abort (); | |
2807 | ||
2808 | BFD_ASSERT (! unresolved_reloc); | |
2809 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2810 | htab->sgot->contents + off); | |
2811 | relocation = htab->sgot->output_offset + off; | |
2812 | if (r_type == R_390_TLS_IEENT) | |
2813 | relocation += htab->sgot->output_section->vma; | |
2814 | unresolved_reloc = FALSE; | |
2815 | break; | |
2816 | ||
2817 | case R_390_TLS_LDM32: | |
2818 | if (! info->shared) | |
2819 | /* The literal pool entry this relocation refers to gets ignored | |
2820 | by the optimized code of the local exec model. Do nothing | |
2821 | and the value will turn out zero. */ | |
2822 | continue; | |
2823 | ||
2824 | if (htab->sgot == NULL) | |
2825 | abort (); | |
2826 | ||
2827 | off = htab->tls_ldm_got.offset; | |
2828 | if (off & 1) | |
2829 | off &= ~1; | |
2830 | else | |
2831 | { | |
2832 | Elf_Internal_Rela outrel; | |
2833 | bfd_byte *loc; | |
2834 | ||
2835 | if (htab->srelgot == NULL) | |
2836 | abort (); | |
2837 | ||
2838 | outrel.r_offset = (htab->sgot->output_section->vma | |
2839 | + htab->sgot->output_offset + off); | |
2840 | ||
2841 | bfd_put_32 (output_bfd, 0, | |
2842 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2843 | outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); | |
2844 | outrel.r_addend = 0; | |
2845 | loc = htab->srelgot->contents; | |
2846 | loc += htab->srelgot->reloc_count++ | |
2847 | * sizeof (Elf32_External_Rela); | |
2848 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2849 | htab->tls_ldm_got.offset |= 1; | |
2850 | } | |
2851 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2852 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2853 | break; |
2854 | ||
2855 | case R_390_TLS_LE32: | |
2856 | if (info->shared) | |
2857 | { | |
2858 | /* Linking a shared library with non-fpic code requires | |
2859 | a R_390_TLS_TPOFF relocation. */ | |
2860 | Elf_Internal_Rela outrel; | |
2861 | asection *sreloc; | |
2862 | bfd_byte *loc; | |
2863 | int indx; | |
2864 | ||
2865 | outrel.r_offset = rel->r_offset | |
2866 | + input_section->output_section->vma | |
2867 | + input_section->output_offset; | |
2868 | if (h != NULL && h->dynindx != -1) | |
2869 | indx = h->dynindx; | |
2870 | else | |
2871 | indx = 0; | |
2872 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); | |
2873 | if (indx == 0) | |
2874 | outrel.r_addend = relocation - dtpoff_base (info); | |
2875 | else | |
2876 | outrel.r_addend = 0; | |
2877 | sreloc = elf_section_data (input_section)->sreloc; | |
2878 | if (sreloc == NULL) | |
2879 | abort (); | |
2880 | loc = sreloc->contents; | |
2881 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2882 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2883 | } | |
2884 | else | |
2885 | { | |
2886 | BFD_ASSERT (! unresolved_reloc); | |
2887 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2888 | contents + rel->r_offset); | |
2889 | } | |
2890 | continue; | |
2891 | ||
2892 | case R_390_TLS_LDO32: | |
2893 | if (info->shared || (input_section->flags & SEC_CODE) == 0) | |
2894 | relocation -= dtpoff_base (info); | |
2895 | else | |
2896 | /* When converting LDO to LE, we must negate. */ | |
2897 | relocation = -tpoff (info, relocation); | |
2898 | break; | |
2899 | ||
2900 | /* Relocations for tls instructions. */ | |
2901 | case R_390_TLS_LOAD: | |
2902 | case R_390_TLS_GDCALL: | |
2903 | case R_390_TLS_LDCALL: | |
2904 | tls_type = GOT_UNKNOWN; | |
2905 | if (h == NULL && local_got_offsets) | |
2906 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2907 | else if (h != NULL) | |
2908 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2909 | ||
2910 | if (tls_type == GOT_TLS_GD) | |
2911 | continue; | |
2912 | ||
2913 | if (r_type == R_390_TLS_LOAD) | |
2914 | { | |
2915 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2916 | { | |
2917 | /* IE->LE transition. Four valid cases: | |
2918 | l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 | |
2919 | l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 | |
2920 | l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 | |
2921 | l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2922 | unsigned int insn, ry; | |
2923 | ||
2924 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2925 | ry = 0; | |
2926 | if ((insn & 0xff00f000) == 0x58000000) | |
2927 | /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ | |
2928 | ry = (insn & 0x000f0000); | |
2929 | else if ((insn & 0xff0f0000) == 0x58000000) | |
2930 | /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2931 | ry = (insn & 0x0000f000) << 4; | |
2932 | else if ((insn & 0xff00f000) == 0x5800c000) | |
2933 | /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ | |
2934 | ry = (insn & 0x000f0000); | |
2935 | else if ((insn & 0xff0f0000) == 0x580c0000) | |
2936 | /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2937 | ry = (insn & 0x0000f000) << 4; | |
2938 | else | |
2939 | invalid_tls_insn (input_bfd, input_section, rel); | |
2940 | insn = 0x18000700 | (insn & 0x00f00000) | ry; | |
2941 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2942 | } | |
2943 | } | |
2944 | else if (r_type == R_390_TLS_GDCALL) | |
2945 | { | |
2946 | unsigned int insn; | |
2947 | ||
2948 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2949 | if ((insn & 0xff000fff) != 0x4d000000) | |
2950 | invalid_tls_insn (input_bfd, input_section, rel); | |
2951 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2952 | /* GD->LE transition. | |
2953 | bas %r14,0(%rx,%r13) -> bc 0,0 */ | |
2954 | insn = 0x47000000; | |
2955 | else | |
2956 | /* GD->IE transition. | |
2957 | bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ | |
2958 | insn = 0x5822c000; | |
2959 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2960 | } | |
2961 | else if (r_type == R_390_TLS_LDCALL) | |
2962 | { | |
2963 | if (!info->shared) | |
2964 | { | |
2965 | unsigned int insn; | |
2966 | ||
2967 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2968 | if ((insn & 0xff000fff) != 0x4d000000) | |
2969 | invalid_tls_insn (input_bfd, input_section, rel); | |
2970 | /* LD->LE transition. | |
2971 | bas %r14,0(%rx,%r13) -> bc 0,0 */ | |
2972 | insn = 0x47000000; | |
2973 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2974 | } | |
2975 | } | |
2976 | continue; | |
2977 | ||
0451c93c MS |
2978 | default: |
2979 | break; | |
2980 | } | |
ec338859 | 2981 | |
239e1f3a AM |
2982 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2983 | because such sections are not SEC_ALLOC and thus ld.so will | |
2984 | not process them. */ | |
0451c93c | 2985 | if (unresolved_reloc |
239e1f3a | 2986 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
0451c93c MS |
2987 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
2988 | (*_bfd_error_handler) | |
2989 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
2990 | bfd_archive_filename (input_bfd), | |
2991 | bfd_get_section_name (input_bfd, input_section), | |
2992 | (long) rel->r_offset, | |
2993 | h->root.root.string); | |
ec338859 | 2994 | |
bd1ea41b MS |
2995 | if (r_type == R_390_20 |
2996 | || r_type == R_390_GOT20 | |
2997 | || r_type == R_390_GOTPLT20 | |
2998 | || r_type == R_390_TLS_GOTIE20) | |
2999 | { | |
3000 | relocation += rel->r_addend; | |
3001 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; | |
3002 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3003 | contents, rel->r_offset, | |
3004 | relocation, 0); | |
3005 | } | |
3006 | else | |
3007 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3008 | contents, rel->r_offset, | |
3009 | relocation, rel->r_addend); | |
ec338859 | 3010 | |
a85d7ed0 NC |
3011 | if (r != bfd_reloc_ok) |
3012 | { | |
0451c93c | 3013 | const char *name; |
ec338859 | 3014 | |
0451c93c MS |
3015 | if (h != NULL) |
3016 | name = h->root.root.string; | |
3017 | else | |
a85d7ed0 | 3018 | { |
0451c93c MS |
3019 | name = bfd_elf_string_from_elf_section (input_bfd, |
3020 | symtab_hdr->sh_link, | |
3021 | sym->st_name); | |
3022 | if (name == NULL) | |
b34976b6 | 3023 | return FALSE; |
0451c93c MS |
3024 | if (*name == '\0') |
3025 | name = bfd_section_name (input_bfd, sec); | |
3026 | } | |
ec338859 | 3027 | |
0451c93c MS |
3028 | if (r == bfd_reloc_overflow) |
3029 | { | |
ec338859 | 3030 | |
0451c93c MS |
3031 | if (! ((*info->callbacks->reloc_overflow) |
3032 | (info, name, howto->name, (bfd_vma) 0, | |
3033 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 3034 | return FALSE; |
0451c93c MS |
3035 | } |
3036 | else | |
3037 | { | |
3038 | (*_bfd_error_handler) | |
3039 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
3040 | bfd_archive_filename (input_bfd), | |
3041 | bfd_get_section_name (input_bfd, input_section), | |
3042 | (long) rel->r_offset, name, (int) r); | |
b34976b6 | 3043 | return FALSE; |
a85d7ed0 NC |
3044 | } |
3045 | } | |
3046 | } | |
ec338859 | 3047 | |
b34976b6 | 3048 | return TRUE; |
a85d7ed0 NC |
3049 | } |
3050 | ||
3051 | /* Finish up dynamic symbol handling. We set the contents of various | |
3052 | dynamic sections here. */ | |
3053 | ||
b34976b6 | 3054 | static bfd_boolean |
a85d7ed0 NC |
3055 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
3056 | bfd *output_bfd; | |
3057 | struct bfd_link_info *info; | |
3058 | struct elf_link_hash_entry *h; | |
3059 | Elf_Internal_Sym *sym; | |
3060 | { | |
0451c93c | 3061 | struct elf_s390_link_hash_table *htab; |
ec338859 | 3062 | |
0451c93c | 3063 | htab = elf_s390_hash_table (info); |
ec338859 | 3064 | |
a85d7ed0 NC |
3065 | if (h->plt.offset != (bfd_vma) -1) |
3066 | { | |
0451c93c MS |
3067 | bfd_vma plt_index; |
3068 | bfd_vma got_offset; | |
a85d7ed0 | 3069 | Elf_Internal_Rela rela; |
947216bf | 3070 | bfd_byte *loc; |
a85d7ed0 | 3071 | bfd_vma relative_offset; |
ec338859 | 3072 | |
a85d7ed0 | 3073 | /* This symbol has an entry in the procedure linkage table. Set |
26e41594 | 3074 | it up. */ |
0451c93c MS |
3075 | if (h->dynindx == -1 |
3076 | || htab->splt == NULL | |
3077 | || htab->sgotplt == NULL | |
3078 | || htab->srelplt == NULL) | |
3079 | abort (); | |
a85d7ed0 | 3080 | |
dc810e39 | 3081 | /* Calc. index no. |
26e41594 | 3082 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
3083 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
3084 | ||
3085 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, | |
26e41594 | 3086 | addr & GOT addr. */ |
a85d7ed0 NC |
3087 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3088 | ||
3089 | /* S390 uses halfwords for relative branch calc! */ | |
dc810e39 | 3090 | relative_offset = - ((PLT_FIRST_ENTRY_SIZE + |
26e41594 | 3091 | (PLT_ENTRY_SIZE * plt_index) + 18) / 2); |
a85d7ed0 | 3092 | /* If offset is > 32768, branch to a previous branch |
26e41594 | 3093 | 390 can only handle +-64 K jumps. */ |
dc810e39 | 3094 | if ( -32768 > (int) relative_offset ) |
26e41594 AM |
3095 | relative_offset |
3096 | = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); | |
a85d7ed0 NC |
3097 | |
3098 | /* Fill in the entry in the procedure linkage table. */ | |
3099 | if (!info->shared) | |
0451c93c | 3100 | { |
26e41594 | 3101 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
0451c93c MS |
3102 | htab->splt->contents + h->plt.offset); |
3103 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
3104 | htab->splt->contents + h->plt.offset + 4); | |
3105 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
3106 | htab->splt->contents + h->plt.offset + 8); | |
3107 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
3108 | htab->splt->contents + h->plt.offset + 12); | |
3109 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
3110 | htab->splt->contents + h->plt.offset + 16); | |
3111 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3112 | htab->splt->contents + h->plt.offset + 20); | |
3113 | bfd_put_32 (output_bfd, | |
3114 | (htab->sgotplt->output_section->vma | |
3115 | + htab->sgotplt->output_offset | |
3116 | + got_offset), | |
3117 | htab->splt->contents + h->plt.offset + 24); | |
3118 | } | |
a85d7ed0 | 3119 | else if (got_offset < 4096) |
0451c93c MS |
3120 | { |
3121 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset, | |
3122 | htab->splt->contents + h->plt.offset); | |
3123 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1, | |
3124 | htab->splt->contents + h->plt.offset + 4); | |
3125 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2, | |
3126 | htab->splt->contents + h->plt.offset + 8); | |
3127 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3, | |
3128 | htab->splt->contents + h->plt.offset + 12); | |
3129 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4, | |
3130 | htab->splt->contents + h->plt.offset + 16); | |
3131 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3132 | htab->splt->contents + h->plt.offset + 20); | |
3133 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3134 | htab->splt->contents + h->plt.offset + 24); | |
3135 | } | |
a85d7ed0 | 3136 | else if (got_offset < 32768) |
0451c93c MS |
3137 | { |
3138 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset, | |
3139 | htab->splt->contents + h->plt.offset); | |
3140 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1, | |
3141 | htab->splt->contents + h->plt.offset + 4); | |
3142 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2, | |
3143 | htab->splt->contents + h->plt.offset + 8); | |
3144 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3, | |
3145 | htab->splt->contents + h->plt.offset + 12); | |
3146 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4, | |
3147 | htab->splt->contents + h->plt.offset + 16); | |
3148 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3149 | htab->splt->contents + h->plt.offset + 20); | |
3150 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3151 | htab->splt->contents + h->plt.offset + 24); | |
3152 | } | |
a85d7ed0 | 3153 | else |
0451c93c MS |
3154 | { |
3155 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0, | |
3156 | htab->splt->contents + h->plt.offset); | |
3157 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1, | |
3158 | htab->splt->contents + h->plt.offset + 4); | |
3159 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, | |
3160 | htab->splt->contents + h->plt.offset + 8); | |
3161 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, | |
3162 | htab->splt->contents + h->plt.offset + 12); | |
3163 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, | |
3164 | htab->splt->contents + h->plt.offset + 16); | |
3165 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3166 | htab->splt->contents + h->plt.offset + 20); | |
3167 | bfd_put_32 (output_bfd, got_offset, | |
3168 | htab->splt->contents + h->plt.offset + 24); | |
3169 | } | |
a85d7ed0 NC |
3170 | /* Insert offset into reloc. table here. */ |
3171 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
26e41594 | 3172 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3173 | |
3174 | /* Fill in the entry in the global offset table. | |
26e41594 | 3175 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3176 | bfd_put_32 (output_bfd, |
0451c93c MS |
3177 | (htab->splt->output_section->vma |
3178 | + htab->splt->output_offset | |
a85d7ed0 NC |
3179 | + h->plt.offset |
3180 | + 12), | |
0451c93c | 3181 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3182 | |
0451c93c MS |
3183 | /* Fill in the entry in the .rela.plt section. */ |
3184 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3185 | + htab->sgotplt->output_offset | |
3186 | + got_offset); | |
3187 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3188 | rela.r_addend = 0; | |
947216bf | 3189 | loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela); |
0451c93c | 3190 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
ec338859 | 3191 | |
a85d7ed0 NC |
3192 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
3193 | { | |
3194 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3195 | the .plt section. Leave the value alone. This is a clue |
3196 | for the dynamic linker, to make function pointer | |
3197 | comparisons work between an application and shared | |
ec338859 | 3198 | library. */ |
a85d7ed0 NC |
3199 | sym->st_shndx = SHN_UNDEF; |
3200 | } | |
3201 | } | |
ec338859 | 3202 | |
69fc87f1 MS |
3203 | if (h->got.offset != (bfd_vma) -1 |
3204 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3205 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3206 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3207 | { |
a85d7ed0 | 3208 | Elf_Internal_Rela rela; |
947216bf | 3209 | bfd_byte *loc; |
a85d7ed0 NC |
3210 | |
3211 | /* This symbol has an entry in the global offset table. Set it | |
26e41594 | 3212 | up. */ |
a85d7ed0 | 3213 | |
0451c93c MS |
3214 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3215 | abort (); | |
a85d7ed0 | 3216 | |
0451c93c MS |
3217 | rela.r_offset = (htab->sgot->output_section->vma |
3218 | + htab->sgot->output_offset | |
dc810e39 | 3219 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3220 | |
3221 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3222 | symbol is defined locally or was forced to be local because | |
3223 | of a version file, we just want to emit a RELATIVE reloc. | |
3224 | The entry in the global offset table will already have been | |
3225 | initialized in the relocate_section function. */ | |
0451c93c MS |
3226 | if (info->shared |
3227 | && (info->symbolic | |
3228 | || h->dynindx == -1 | |
3229 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
3230 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
3231 | { | |
3232 | BFD_ASSERT((h->got.offset & 1) != 0); | |
3233 | rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
3234 | rela.r_addend = (h->root.u.def.value | |
26e41594 AM |
3235 | + h->root.u.def.section->output_section->vma |
3236 | + h->root.u.def.section->output_offset); | |
3237 | } | |
a85d7ed0 NC |
3238 | else |
3239 | { | |
3240 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3241 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3242 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); |
26e41594 AM |
3243 | rela.r_addend = 0; |
3244 | } | |
a85d7ed0 | 3245 | |
947216bf AM |
3246 | loc = htab->srelgot->contents; |
3247 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 3248 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3249 | } |
3250 | ||
3251 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3252 | { | |
a85d7ed0 | 3253 | Elf_Internal_Rela rela; |
947216bf | 3254 | bfd_byte *loc; |
a85d7ed0 NC |
3255 | |
3256 | /* This symbols needs a copy reloc. Set it up. */ | |
3257 | ||
0451c93c MS |
3258 | if (h->dynindx == -1 |
3259 | || (h->root.type != bfd_link_hash_defined | |
3260 | && h->root.type != bfd_link_hash_defweak) | |
3261 | || htab->srelbss == NULL) | |
3262 | abort (); | |
a85d7ed0 NC |
3263 | |
3264 | rela.r_offset = (h->root.u.def.value | |
3265 | + h->root.u.def.section->output_section->vma | |
3266 | + h->root.u.def.section->output_offset); | |
3267 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); | |
3268 | rela.r_addend = 0; | |
947216bf AM |
3269 | loc = htab->srelbss->contents; |
3270 | loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 3271 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3272 | } |
3273 | ||
3274 | /* Mark some specially defined symbols as absolute. */ | |
3275 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3276 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3277 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3278 | sym->st_shndx = SHN_ABS; | |
3279 | ||
b34976b6 | 3280 | return TRUE; |
a85d7ed0 NC |
3281 | } |
3282 | ||
0451c93c MS |
3283 | /* Used to decide how to sort relocs in an optimal manner for the |
3284 | dynamic linker, before writing them out. */ | |
3285 | ||
3286 | static enum elf_reloc_type_class | |
3287 | elf_s390_reloc_type_class (rela) | |
3288 | const Elf_Internal_Rela *rela; | |
3289 | { | |
3290 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3291 | { | |
3292 | case R_390_RELATIVE: | |
3293 | return reloc_class_relative; | |
3294 | case R_390_JMP_SLOT: | |
3295 | return reloc_class_plt; | |
3296 | case R_390_COPY: | |
3297 | return reloc_class_copy; | |
3298 | default: | |
3299 | return reloc_class_normal; | |
3300 | } | |
3301 | } | |
3302 | ||
a85d7ed0 NC |
3303 | /* Finish up the dynamic sections. */ |
3304 | ||
b34976b6 | 3305 | static bfd_boolean |
a85d7ed0 NC |
3306 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3307 | bfd *output_bfd; | |
3308 | struct bfd_link_info *info; | |
3309 | { | |
0451c93c | 3310 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3311 | bfd *dynobj; |
3312 | asection *sdyn; | |
a85d7ed0 | 3313 | |
0451c93c MS |
3314 | htab = elf_s390_hash_table (info); |
3315 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3316 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3317 | ||
0451c93c | 3318 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3319 | { |
a85d7ed0 NC |
3320 | Elf32_External_Dyn *dyncon, *dynconend; |
3321 | ||
0451c93c MS |
3322 | if (sdyn == NULL || htab->sgot == NULL) |
3323 | abort (); | |
a85d7ed0 NC |
3324 | |
3325 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3326 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
3327 | for (; dyncon < dynconend; dyncon++) | |
3328 | { | |
3329 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3330 | asection *s; |
ec338859 | 3331 | |
a85d7ed0 | 3332 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3333 | |
a85d7ed0 NC |
3334 | switch (dyn.d_tag) |
3335 | { | |
3336 | default: | |
0451c93c | 3337 | continue; |
ec338859 | 3338 | |
a85d7ed0 | 3339 | case DT_PLTGOT: |
0451c93c MS |
3340 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3341 | break; | |
ec338859 | 3342 | |
a85d7ed0 | 3343 | case DT_JMPREL: |
0451c93c | 3344 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 NC |
3345 | break; |
3346 | ||
3347 | case DT_PLTRELSZ: | |
0451c93c | 3348 | s = htab->srelplt->output_section; |
a85d7ed0 NC |
3349 | if (s->_cooked_size != 0) |
3350 | dyn.d_un.d_val = s->_cooked_size; | |
3351 | else | |
3352 | dyn.d_un.d_val = s->_raw_size; | |
a85d7ed0 NC |
3353 | break; |
3354 | } | |
0451c93c MS |
3355 | |
3356 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3357 | } |
3358 | ||
3359 | /* Fill in the special first entry in the procedure linkage table. */ | |
0451c93c | 3360 | if (htab->splt && htab->splt->_raw_size > 0) |
a85d7ed0 | 3361 | { |
26e41594 AM |
3362 | memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE); |
3363 | if (info->shared) | |
0451c93c | 3364 | { |
dc810e39 | 3365 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0, |
26e41594 | 3366 | htab->splt->contents ); |
dc810e39 | 3367 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1, |
26e41594 | 3368 | htab->splt->contents +4 ); |
dc810e39 | 3369 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2, |
26e41594 | 3370 | htab->splt->contents +8 ); |
dc810e39 | 3371 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3, |
26e41594 | 3372 | htab->splt->contents +12 ); |
dc810e39 | 3373 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4, |
26e41594 AM |
3374 | htab->splt->contents +16 ); |
3375 | } | |
3376 | else | |
3377 | { | |
3378 | bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0, | |
3379 | htab->splt->contents ); | |
3380 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3381 | htab->splt->contents +4 ); | |
3382 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2, | |
3383 | htab->splt->contents +8 ); | |
3384 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3385 | htab->splt->contents +12 ); | |
3386 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3387 | htab->splt->contents +16 ); | |
3388 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3389 | htab->splt->contents +20 ); | |
3390 | bfd_put_32 (output_bfd, | |
3391 | htab->sgotplt->output_section->vma | |
0451c93c | 3392 | + htab->sgotplt->output_offset, |
26e41594 AM |
3393 | htab->splt->contents + 24); |
3394 | } | |
0451c93c MS |
3395 | elf_section_data (htab->splt->output_section) |
3396 | ->this_hdr.sh_entsize = 4; | |
a85d7ed0 NC |
3397 | } |
3398 | ||
3399 | } | |
3400 | ||
0451c93c | 3401 | if (htab->sgotplt) |
a85d7ed0 | 3402 | { |
0451c93c MS |
3403 | /* Fill in the first three entries in the global offset table. */ |
3404 | if (htab->sgotplt->_raw_size > 0) | |
3405 | { | |
3406 | bfd_put_32 (output_bfd, | |
3407 | (sdyn == NULL ? (bfd_vma) 0 | |
3408 | : sdyn->output_section->vma + sdyn->output_offset), | |
3409 | htab->sgotplt->contents); | |
3410 | /* One entry for shared object struct ptr. */ | |
3411 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
3412 | /* One entry for _dl_runtime_resolve. */ | |
3413 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3414 | } | |
a85d7ed0 | 3415 | |
0451c93c MS |
3416 | elf_section_data (htab->sgotplt->output_section) |
3417 | ->this_hdr.sh_entsize = 4; | |
3418 | } | |
b34976b6 | 3419 | return TRUE; |
a85d7ed0 NC |
3420 | } |
3421 | ||
b34976b6 | 3422 | static bfd_boolean |
979f4a38 NC |
3423 | elf_s390_grok_prstatus (abfd, note) |
3424 | bfd * abfd; | |
3425 | Elf_Internal_Note * note; | |
3426 | { | |
3427 | int offset; | |
3428 | unsigned int raw_size; | |
3429 | ||
3430 | switch (note->descsz) | |
3431 | { | |
3432 | default: | |
b34976b6 | 3433 | return FALSE; |
979f4a38 NC |
3434 | |
3435 | case 224: /* S/390 Linux. */ | |
3436 | /* pr_cursig */ | |
3437 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
3438 | ||
3439 | /* pr_pid */ | |
3440 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
3441 | ||
3442 | /* pr_reg */ | |
3443 | offset = 72; | |
3444 | raw_size = 144; | |
3445 | break; | |
3446 | } | |
3447 | ||
3448 | /* Make a ".reg/999" section. */ | |
3449 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
3450 | raw_size, note->descpos + offset); | |
3451 | } | |
3452 | ||
a85d7ed0 NC |
3453 | #define TARGET_BIG_SYM bfd_elf32_s390_vec |
3454 | #define TARGET_BIG_NAME "elf32-s390" | |
3455 | #define ELF_ARCH bfd_arch_s390 | |
3456 | #define ELF_MACHINE_CODE EM_S390 | |
3457 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3458 | #define ELF_MAXPAGESIZE 0x1000 | |
3459 | ||
3460 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3461 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3462 | #define elf_backend_want_got_plt 1 |
3463 | #define elf_backend_plt_readonly 1 | |
3464 | #define elf_backend_want_plt_sym 0 | |
3465 | #define elf_backend_got_header_size 12 | |
3466 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
b491616a | 3467 | #define elf_backend_rela_normal 1 |
a85d7ed0 | 3468 | |
26e41594 | 3469 | #define elf_info_to_howto elf_s390_info_to_howto |
a85d7ed0 | 3470 | |
a85d7ed0 NC |
3471 | #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name |
3472 | #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3473 | #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
3474 | ||
3475 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
26e41594 | 3476 | #define elf_backend_check_relocs elf_s390_check_relocs |
0451c93c MS |
3477 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3478 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3479 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3480 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
26e41594 AM |
3481 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook |
3482 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3483 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
26e41594 | 3484 | #define elf_backend_relocate_section elf_s390_relocate_section |
a85d7ed0 | 3485 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections |
29c2fb7c | 3486 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
979f4a38 | 3487 | #define elf_backend_grok_prstatus elf_s390_grok_prstatus |
a85d7ed0 | 3488 | |
69fc87f1 | 3489 | #define bfd_elf32_mkobject elf_s390_mkobject |
26e41594 | 3490 | #define elf_backend_object_p elf_s390_object_p |
a85d7ed0 NC |
3491 | |
3492 | #include "elf32-target.h" |