Commit | Line | Data |
---|---|---|
a85d7ed0 | 1 | /* IBM S/390-specific support for 32-bit ELF |
b2a8e766 | 2 | Copyright 2000, 2001, 2002, 2003, 2004 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; | |
eea6121a | 401 | bfd_size_type sz; |
bd1ea41b MS |
402 | |
403 | if (output_bfd != (bfd *) NULL | |
404 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
405 | && (! howto->partial_inplace | |
406 | || reloc_entry->addend == 0)) | |
407 | { | |
408 | reloc_entry->address += input_section->output_offset; | |
409 | return bfd_reloc_ok; | |
410 | } | |
411 | ||
412 | if (output_bfd != NULL) | |
413 | return bfd_reloc_continue; | |
414 | ||
eea6121a AM |
415 | sz = input_section->rawsize ? input_section->rawsize : input_section->size; |
416 | if (reloc_entry->address > sz) | |
bd1ea41b MS |
417 | return bfd_reloc_outofrange; |
418 | ||
419 | relocation = (symbol->value | |
420 | + symbol->section->output_section->vma | |
421 | + symbol->section->output_offset); | |
422 | relocation += reloc_entry->addend; | |
423 | if (howto->pc_relative) | |
424 | { | |
425 | relocation -= (input_section->output_section->vma | |
426 | + input_section->output_offset); | |
427 | relocation -= reloc_entry->address; | |
428 | } | |
429 | ||
430 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
431 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; | |
432 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
433 | ||
434 | if ((bfd_signed_vma) relocation < - 0x80000 | |
435 | || (bfd_signed_vma) relocation > 0x7ffff) | |
436 | return bfd_reloc_overflow; | |
437 | else | |
438 | return bfd_reloc_ok; | |
439 | } | |
440 | ||
b34976b6 | 441 | static bfd_boolean |
a85d7ed0 NC |
442 | elf_s390_is_local_label_name (abfd, name) |
443 | bfd *abfd; | |
444 | const char *name; | |
445 | { | |
446 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 447 | return TRUE; |
a85d7ed0 NC |
448 | |
449 | return _bfd_elf_is_local_label_name (abfd, name); | |
450 | } | |
451 | ||
452 | /* Functions for the 390 ELF linker. */ | |
453 | ||
454 | /* The name of the dynamic interpreter. This is put in the .interp | |
455 | section. */ | |
456 | ||
457 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
458 | ||
64285810 MS |
459 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
460 | copying dynamic variables from a shared lib into an app's dynbss | |
461 | section, and instead use a dynamic relocation to point into the | |
462 | shared lib. */ | |
463 | #define ELIMINATE_COPY_RELOCS 1 | |
464 | ||
a85d7ed0 NC |
465 | /* The size in bytes of the first entry in the procedure linkage table. */ |
466 | #define PLT_FIRST_ENTRY_SIZE 32 | |
467 | /* The size in bytes of an entry in the procedure linkage table. */ | |
dc810e39 | 468 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
469 | |
470 | #define GOT_ENTRY_SIZE 4 | |
471 | ||
472 | /* The first three entries in a procedure linkage table are reserved, | |
473 | and the initial contents are unimportant (we zero them out). | |
474 | Subsequent entries look like this. See the SVR4 ABI 386 | |
475 | supplement to see how this works. */ | |
476 | ||
477 | /* For the s390, simple addr offset can only be 0 - 4096. | |
478 | To use the full 2 GB address space, several instructions | |
479 | are needed to load an address in a register and execute | |
480 | a branch( or just saving the address) | |
481 | ||
dc810e39 | 482 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
483 | |
484 | /* The first 3 words in the GOT are then reserved. | |
485 | Word 0 is the address of the dynamic table. | |
486 | Word 1 is a pointer to a structure describing the object | |
487 | Word 2 is used to point to the loader entry address. | |
488 | ||
4cc11e76 | 489 | The code for position independent PLT entries looks like this: |
a85d7ed0 NC |
490 | |
491 | r12 holds addr of the current GOT at entry to the PLT | |
492 | ||
493 | The GOT holds the address in the PLT to be executed. | |
494 | The loader then gets: | |
495 | 24(15) = Pointer to the structure describing the object. | |
dc810e39 | 496 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
497 | |
498 | The loader must then find the module where the function is | |
499 | and insert the address in the GOT. | |
500 | ||
501 | Note: 390 can only address +- 64 K relative. | |
502 | We check if offset > 65536, then make a relative branch -64xxx | |
503 | back to a previous defined branch | |
504 | ||
505 | PLT1: BASR 1,0 # 2 bytes | |
506 | L 1,22(1) # 4 bytes Load offset in GOT in r 1 | |
507 | L 1,(1,12) # 4 bytes Load address from GOT in r1 | |
508 | BCR 15,1 # 2 bytes Jump to address | |
509 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
510 | L 1,14(1) # 4 bytes Load offset in symol table in r1 | |
511 | BRC 15,-x # 4 bytes Jump to start of PLT | |
512 | .word 0 # 2 bytes filler | |
513 | .long ? # 4 bytes offset in GOT | |
514 | .long ? # 4 bytes offset into symbol table | |
515 | ||
516 | This was the general case. There are two additional, optimizes PLT | |
517 | definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. | |
518 | First the one for GOT offsets < 4096: | |
519 | ||
520 | PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 | |
521 | BCR 15,1 # 2 bytes Jump to address | |
522 | .word 0,0,0 # 6 bytes filler | |
523 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
524 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
525 | BRC 15,-x # 4 bytes Jump to start of PLT | |
526 | .word 0,0,0 # 6 bytes filler | |
527 | .long ? # 4 bytes offset into symbol table | |
528 | ||
529 | Second the one for GOT offsets < 32768: | |
530 | ||
531 | PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 | |
532 | L 1,(1,12) # 4 bytes Load address from GOT to r1 | |
533 | BCR 15,1 # 2 bytes Jump to address | |
534 | .word 0 # 2 bytes filler | |
535 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
536 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
537 | BRC 15,-x # 4 bytes Jump to start of PLT | |
538 | .word 0,0,0 # 6 bytes filler | |
539 | .long ? # 4 bytes offset into symbol table | |
540 | ||
541 | Total = 32 bytes per PLT entry | |
542 | ||
543 | The code for static build PLT entries looks like this: | |
544 | ||
545 | PLT1: BASR 1,0 # 2 bytes | |
546 | L 1,22(1) # 4 bytes Load address of GOT entry | |
547 | L 1,0(0,1) # 4 bytes Load address from GOT in r1 | |
548 | BCR 15,1 # 2 bytes Jump to address | |
549 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
550 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
551 | BRC 15,-x # 4 bytes Jump to start of PLT | |
552 | .word 0 # 2 bytes filler | |
553 | .long ? # 4 bytes address of GOT entry | |
554 | .long ? # 4 bytes offset into symbol table */ | |
555 | ||
556 | #define PLT_PIC_ENTRY_WORD0 0x0d105810 | |
557 | #define PLT_PIC_ENTRY_WORD1 0x10165811 | |
558 | #define PLT_PIC_ENTRY_WORD2 0xc00007f1 | |
559 | #define PLT_PIC_ENTRY_WORD3 0x0d105810 | |
560 | #define PLT_PIC_ENTRY_WORD4 0x100ea7f4 | |
561 | ||
562 | #define PLT_PIC12_ENTRY_WORD0 0x5810c000 | |
563 | #define PLT_PIC12_ENTRY_WORD1 0x07f10000 | |
564 | #define PLT_PIC12_ENTRY_WORD2 0x00000000 | |
565 | #define PLT_PIC12_ENTRY_WORD3 0x0d105810 | |
566 | #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4 | |
567 | ||
568 | #define PLT_PIC16_ENTRY_WORD0 0xa7180000 | |
569 | #define PLT_PIC16_ENTRY_WORD1 0x5811c000 | |
570 | #define PLT_PIC16_ENTRY_WORD2 0x07f10000 | |
571 | #define PLT_PIC16_ENTRY_WORD3 0x0d105810 | |
572 | #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4 | |
573 | ||
574 | #define PLT_ENTRY_WORD0 0x0d105810 | |
575 | #define PLT_ENTRY_WORD1 0x10165810 | |
576 | #define PLT_ENTRY_WORD2 0x100007f1 | |
577 | #define PLT_ENTRY_WORD3 0x0d105810 | |
578 | #define PLT_ENTRY_WORD4 0x100ea7f4 | |
579 | ||
580 | /* The first PLT entry pushes the offset into the symbol table | |
581 | from R1 onto the stack at 8(15) and the loader object info | |
582 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
583 | ||
584 | /* The first entry in the PLT for PIC code: | |
585 | ||
586 | PLT0: | |
587 | ST 1,28(15) # R1 has offset into symbol table | |
588 | L 1,4(12) # Get loader ino(object struct address) | |
dc810e39 | 589 | ST 1,24(15) # Store address |
a85d7ed0 NC |
590 | L 1,8(12) # Entry address of loader in R1 |
591 | BR 1 # Jump to loader | |
592 | ||
593 | The first entry in the PLT for static code: | |
594 | ||
595 | PLT0: | |
596 | ST 1,28(15) # R1 has offset into symbol table | |
597 | BASR 1,0 | |
598 | L 1,18(0,1) # Get address of GOT | |
599 | MVC 24(4,15),4(1) # Move loader ino to stack | |
600 | L 1,8(1) # Get address of loader | |
601 | BR 1 # Jump to loader | |
602 | .word 0 # filler | |
603 | .long got # address of GOT */ | |
604 | ||
605 | #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c | |
606 | #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004 | |
607 | #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018 | |
608 | #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008 | |
609 | #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000 | |
610 | ||
611 | #define PLT_FIRST_ENTRY_WORD0 0x5010f01c | |
612 | #define PLT_FIRST_ENTRY_WORD1 0x0d105810 | |
613 | #define PLT_FIRST_ENTRY_WORD2 0x1012D203 | |
614 | #define PLT_FIRST_ENTRY_WORD3 0xf0181004 | |
615 | #define PLT_FIRST_ENTRY_WORD4 0x58101008 | |
616 | #define PLT_FIRST_ENTRY_WORD5 0x07f10000 | |
617 | ||
618 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
619 | decides to copy as dynamic relocs in check_relocs for each symbol. |
620 | This is so that it can later discard them if they are found to be | |
621 | unnecessary. We store the information in a field extending the | |
622 | regular ELF linker hash table. */ | |
a85d7ed0 | 623 | |
0451c93c | 624 | struct elf_s390_dyn_relocs |
a85d7ed0 | 625 | { |
0451c93c MS |
626 | struct elf_s390_dyn_relocs *next; |
627 | ||
628 | /* The input section of the reloc. */ | |
629 | asection *sec; | |
630 | ||
631 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 632 | bfd_size_type count; |
0451c93c MS |
633 | |
634 | /* Number of pc-relative relocs copied for the input section. */ | |
635 | bfd_size_type pc_count; | |
a85d7ed0 NC |
636 | }; |
637 | ||
638 | /* s390 ELF linker hash entry. */ | |
639 | ||
640 | struct elf_s390_link_hash_entry | |
641 | { | |
0451c93c | 642 | struct elf_link_hash_entry elf; |
a85d7ed0 | 643 | |
0451c93c MS |
644 | /* Track dynamic relocs copied for this symbol. */ |
645 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
646 | |
647 | /* Number of GOTPLT references for a function. */ | |
648 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
649 | |
650 | #define GOT_UNKNOWN 0 | |
651 | #define GOT_NORMAL 1 | |
652 | #define GOT_TLS_GD 2 | |
653 | #define GOT_TLS_IE 3 | |
654 | #define GOT_TLS_IE_NLT 4 | |
655 | unsigned char tls_type; | |
a85d7ed0 NC |
656 | }; |
657 | ||
69fc87f1 MS |
658 | #define elf_s390_hash_entry(ent) \ |
659 | ((struct elf_s390_link_hash_entry *)(ent)) | |
660 | ||
661 | struct elf_s390_obj_tdata | |
662 | { | |
663 | struct elf_obj_tdata root; | |
664 | ||
665 | /* tls_type for each local got entry. */ | |
666 | char *local_got_tls_type; | |
667 | }; | |
668 | ||
669 | #define elf_s390_tdata(abfd) \ | |
670 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
671 | ||
672 | #define elf_s390_local_got_tls_type(abfd) \ | |
673 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
674 | ||
675 | static bfd_boolean | |
676 | elf_s390_mkobject (abfd) | |
677 | bfd *abfd; | |
678 | { | |
679 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
680 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
681 | if (abfd->tdata.any == NULL) | |
682 | return FALSE; | |
683 | return TRUE; | |
684 | } | |
685 | ||
686 | static bfd_boolean | |
687 | elf_s390_object_p (abfd) | |
688 | bfd *abfd; | |
689 | { | |
69fc87f1 MS |
690 | /* Set the right machine number for an s390 elf32 file. */ |
691 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); | |
692 | } | |
693 | ||
a85d7ed0 NC |
694 | /* s390 ELF linker hash table. */ |
695 | ||
696 | struct elf_s390_link_hash_table | |
697 | { | |
0451c93c | 698 | struct elf_link_hash_table elf; |
a85d7ed0 | 699 | |
0451c93c MS |
700 | /* Short-cuts to get to dynamic linker sections. */ |
701 | asection *sgot; | |
702 | asection *sgotplt; | |
703 | asection *srelgot; | |
704 | asection *splt; | |
705 | asection *srelplt; | |
706 | asection *sdynbss; | |
707 | asection *srelbss; | |
ec338859 | 708 | |
69fc87f1 MS |
709 | union { |
710 | bfd_signed_vma refcount; | |
711 | bfd_vma offset; | |
712 | } tls_ldm_got; | |
713 | ||
ec338859 AM |
714 | /* Small local sym to section mapping cache. */ |
715 | struct sym_sec_cache sym_sec; | |
0451c93c | 716 | }; |
a85d7ed0 NC |
717 | |
718 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
719 | ||
720 | #define elf_s390_hash_table(p) \ | |
721 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
722 | ||
723 | /* Create an entry in an s390 ELF linker hash table. */ | |
724 | ||
725 | static struct bfd_hash_entry * | |
0451c93c | 726 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
727 | struct bfd_hash_entry *entry; |
728 | struct bfd_hash_table *table; | |
729 | const char *string; | |
730 | { | |
a85d7ed0 NC |
731 | /* Allocate the structure if it has not already been allocated by a |
732 | subclass. */ | |
0451c93c MS |
733 | if (entry == NULL) |
734 | { | |
735 | entry = bfd_hash_allocate (table, | |
736 | sizeof (struct elf_s390_link_hash_entry)); | |
737 | if (entry == NULL) | |
738 | return entry; | |
739 | } | |
ec338859 | 740 | |
a85d7ed0 | 741 | /* Call the allocation method of the superclass. */ |
0451c93c MS |
742 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
743 | if (entry != NULL) | |
a85d7ed0 | 744 | { |
0451c93c | 745 | struct elf_s390_link_hash_entry *eh; |
ec338859 | 746 | |
0451c93c MS |
747 | eh = (struct elf_s390_link_hash_entry *) entry; |
748 | eh->dyn_relocs = NULL; | |
5236c819 | 749 | eh->gotplt_refcount = 0; |
69fc87f1 | 750 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
751 | } |
752 | ||
0451c93c | 753 | return entry; |
a85d7ed0 NC |
754 | } |
755 | ||
756 | /* Create an s390 ELF linker hash table. */ | |
757 | ||
758 | static struct bfd_link_hash_table * | |
759 | elf_s390_link_hash_table_create (abfd) | |
760 | bfd *abfd; | |
761 | { | |
762 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 763 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 764 | |
e2d34d7d | 765 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 766 | if (ret == NULL) |
a85d7ed0 NC |
767 | return NULL; |
768 | ||
0451c93c | 769 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
a85d7ed0 | 770 | { |
e2d34d7d | 771 | free (ret); |
a85d7ed0 NC |
772 | return NULL; |
773 | } | |
774 | ||
0451c93c MS |
775 | ret->sgot = NULL; |
776 | ret->sgotplt = NULL; | |
777 | ret->srelgot = NULL; | |
778 | ret->splt = NULL; | |
779 | ret->srelplt = NULL; | |
780 | ret->sdynbss = NULL; | |
781 | ret->srelbss = NULL; | |
69fc87f1 | 782 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 783 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
784 | |
785 | return &ret->elf.root; | |
786 | } | |
787 | ||
788 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
789 | shortcuts to them in our hash table. */ | |
790 | ||
b34976b6 | 791 | static bfd_boolean |
0451c93c MS |
792 | create_got_section (dynobj, info) |
793 | bfd *dynobj; | |
794 | struct bfd_link_info *info; | |
795 | { | |
796 | struct elf_s390_link_hash_table *htab; | |
797 | ||
798 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 799 | return FALSE; |
0451c93c MS |
800 | |
801 | htab = elf_s390_hash_table (info); | |
802 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
803 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
804 | if (!htab->sgot || !htab->sgotplt) | |
805 | abort (); | |
806 | ||
807 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
808 | if (htab->srelgot == NULL | |
809 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
810 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
811 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
812 | | SEC_READONLY)) | |
813 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
b34976b6 AM |
814 | return FALSE; |
815 | return TRUE; | |
0451c93c MS |
816 | } |
817 | ||
818 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
819 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
820 | hash table. */ | |
821 | ||
b34976b6 | 822 | static bfd_boolean |
0451c93c MS |
823 | elf_s390_create_dynamic_sections (dynobj, info) |
824 | bfd *dynobj; | |
825 | struct bfd_link_info *info; | |
826 | { | |
827 | struct elf_s390_link_hash_table *htab; | |
828 | ||
829 | htab = elf_s390_hash_table (info); | |
830 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 831 | return FALSE; |
0451c93c MS |
832 | |
833 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 834 | return FALSE; |
0451c93c MS |
835 | |
836 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
837 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
838 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
839 | if (!info->shared) | |
840 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
841 | ||
842 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
843 | || (!info->shared && !htab->srelbss)) | |
844 | abort (); | |
845 | ||
b34976b6 | 846 | return TRUE; |
a85d7ed0 NC |
847 | } |
848 | ||
0451c93c MS |
849 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
850 | ||
851 | static void | |
b48fa14c | 852 | elf_s390_copy_indirect_symbol (bed, dir, ind) |
9c5bfbb7 | 853 | const struct elf_backend_data *bed; |
0451c93c MS |
854 | struct elf_link_hash_entry *dir, *ind; |
855 | { | |
856 | struct elf_s390_link_hash_entry *edir, *eind; | |
857 | ||
858 | edir = (struct elf_s390_link_hash_entry *) dir; | |
859 | eind = (struct elf_s390_link_hash_entry *) ind; | |
860 | ||
861 | if (eind->dyn_relocs != NULL) | |
862 | { | |
863 | if (edir->dyn_relocs != NULL) | |
864 | { | |
865 | struct elf_s390_dyn_relocs **pp; | |
866 | struct elf_s390_dyn_relocs *p; | |
867 | ||
868 | if (ind->root.type == bfd_link_hash_indirect) | |
869 | abort (); | |
870 | ||
871 | /* Add reloc counts against the weak sym to the strong sym | |
872 | list. Merge any entries against the same section. */ | |
873 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
874 | { | |
875 | struct elf_s390_dyn_relocs *q; | |
876 | ||
877 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
878 | if (q->sec == p->sec) | |
879 | { | |
880 | q->pc_count += p->pc_count; | |
881 | q->count += p->count; | |
882 | *pp = p->next; | |
883 | break; | |
884 | } | |
885 | if (q == NULL) | |
886 | pp = &p->next; | |
887 | } | |
888 | *pp = edir->dyn_relocs; | |
889 | } | |
890 | ||
891 | edir->dyn_relocs = eind->dyn_relocs; | |
892 | eind->dyn_relocs = NULL; | |
893 | } | |
894 | ||
69fc87f1 MS |
895 | if (ind->root.type == bfd_link_hash_indirect |
896 | && dir->got.refcount <= 0) | |
897 | { | |
898 | edir->tls_type = eind->tls_type; | |
899 | eind->tls_type = GOT_UNKNOWN; | |
900 | } | |
901 | ||
64285810 MS |
902 | if (ELIMINATE_COPY_RELOCS |
903 | && ind->root.type != bfd_link_hash_indirect | |
904 | && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
905 | /* If called to transfer flags for a weakdef during processing | |
906 | of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. | |
907 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
908 | dir->elf_link_hash_flags |= | |
909 | (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC | |
910 | | ELF_LINK_HASH_REF_REGULAR | |
3addb0a9 DJ |
911 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK |
912 | | ELF_LINK_HASH_NEEDS_PLT)); | |
64285810 MS |
913 | else |
914 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
0451c93c | 915 | } |
a85d7ed0 | 916 | |
69fc87f1 MS |
917 | static int |
918 | elf_s390_tls_transition (info, r_type, is_local) | |
919 | struct bfd_link_info *info; | |
920 | int r_type; | |
921 | int is_local; | |
922 | { | |
923 | if (info->shared) | |
924 | return r_type; | |
925 | ||
926 | switch (r_type) | |
927 | { | |
928 | case R_390_TLS_GD32: | |
929 | case R_390_TLS_IE32: | |
930 | if (is_local) | |
931 | return R_390_TLS_LE32; | |
932 | return R_390_TLS_IE32; | |
933 | case R_390_TLS_GOTIE32: | |
934 | if (is_local) | |
935 | return R_390_TLS_LE32; | |
936 | return R_390_TLS_GOTIE32; | |
937 | case R_390_TLS_LDM32: | |
938 | return R_390_TLS_LE32; | |
939 | } | |
940 | ||
941 | return r_type; | |
942 | } | |
943 | ||
a85d7ed0 NC |
944 | /* Look through the relocs for a section during the first phase, and |
945 | allocate space in the global offset table or procedure linkage | |
946 | table. */ | |
947 | ||
b34976b6 | 948 | static bfd_boolean |
a85d7ed0 NC |
949 | elf_s390_check_relocs (abfd, info, sec, relocs) |
950 | bfd *abfd; | |
951 | struct bfd_link_info *info; | |
952 | asection *sec; | |
953 | const Elf_Internal_Rela *relocs; | |
954 | { | |
0451c93c | 955 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
956 | Elf_Internal_Shdr *symtab_hdr; |
957 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
958 | const Elf_Internal_Rela *rel; |
959 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 960 | asection *sreloc; |
5236c819 | 961 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 962 | int tls_type, old_tls_type; |
a85d7ed0 | 963 | |
1049f94e | 964 | if (info->relocatable) |
b34976b6 | 965 | return TRUE; |
a85d7ed0 | 966 | |
0451c93c | 967 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
968 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
969 | sym_hashes = elf_sym_hashes (abfd); | |
5236c819 | 970 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 971 | |
a85d7ed0 NC |
972 | sreloc = NULL; |
973 | ||
974 | rel_end = relocs + sec->reloc_count; | |
975 | for (rel = relocs; rel < rel_end; rel++) | |
976 | { | |
69fc87f1 | 977 | unsigned int r_type; |
a85d7ed0 NC |
978 | unsigned long r_symndx; |
979 | struct elf_link_hash_entry *h; | |
980 | ||
981 | r_symndx = ELF32_R_SYM (rel->r_info); | |
982 | ||
0451c93c MS |
983 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
984 | { | |
985 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
986 | bfd_archive_filename (abfd), | |
987 | r_symndx); | |
b34976b6 | 988 | return FALSE; |
0451c93c MS |
989 | } |
990 | ||
a85d7ed0 NC |
991 | if (r_symndx < symtab_hdr->sh_info) |
992 | h = NULL; | |
993 | else | |
dc810e39 | 994 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
a85d7ed0 | 995 | |
5236c819 MS |
996 | /* Create got section and local_got_refcounts array if they |
997 | are needed. */ | |
69fc87f1 MS |
998 | r_type = elf_s390_tls_transition (info, |
999 | ELF32_R_TYPE (rel->r_info), | |
1000 | h == NULL); | |
1001 | switch (r_type) | |
a85d7ed0 NC |
1002 | { |
1003 | case R_390_GOT12: | |
5236c819 | 1004 | case R_390_GOT16: |
bd1ea41b | 1005 | case R_390_GOT20: |
a85d7ed0 | 1006 | case R_390_GOT32: |
befc3abb | 1007 | case R_390_GOTENT: |
5236c819 MS |
1008 | case R_390_GOTPLT12: |
1009 | case R_390_GOTPLT16: | |
bd1ea41b | 1010 | case R_390_GOTPLT20: |
5236c819 MS |
1011 | case R_390_GOTPLT32: |
1012 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
1013 | case R_390_TLS_GD32: |
1014 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1015 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1016 | case R_390_TLS_GOTIE32: |
1017 | case R_390_TLS_IEENT: | |
1018 | case R_390_TLS_IE32: | |
1019 | case R_390_TLS_LDM32: | |
5236c819 MS |
1020 | if (h == NULL |
1021 | && local_got_refcounts == NULL) | |
a85d7ed0 | 1022 | { |
5236c819 | 1023 | bfd_size_type size; |
26e41594 | 1024 | |
5236c819 | 1025 | size = symtab_hdr->sh_info; |
69fc87f1 | 1026 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
1027 | local_got_refcounts = ((bfd_signed_vma *) |
1028 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 1029 | if (local_got_refcounts == NULL) |
5236c819 MS |
1030 | return FALSE; |
1031 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
1032 | elf_s390_local_got_tls_type (abfd) |
1033 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 1034 | } |
5236c819 MS |
1035 | /* Fall through. */ |
1036 | case R_390_GOTOFF16: | |
1037 | case R_390_GOTOFF32: | |
0451c93c | 1038 | case R_390_GOTPC: |
befc3abb | 1039 | case R_390_GOTPCDBL: |
0451c93c MS |
1040 | if (htab->sgot == NULL) |
1041 | { | |
1042 | if (htab->elf.dynobj == NULL) | |
1043 | htab->elf.dynobj = abfd; | |
1044 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1045 | return FALSE; |
0451c93c | 1046 | } |
5236c819 MS |
1047 | } |
1048 | ||
69fc87f1 | 1049 | switch (r_type) |
5236c819 | 1050 | { |
5236c819 MS |
1051 | case R_390_GOTOFF16: |
1052 | case R_390_GOTOFF32: | |
1053 | case R_390_GOTPC: | |
1054 | case R_390_GOTPCDBL: | |
1055 | /* Got is created, nothing to be done. */ | |
a85d7ed0 NC |
1056 | break; |
1057 | ||
26e41594 AM |
1058 | case R_390_PLT16DBL: |
1059 | case R_390_PLT32DBL: | |
a85d7ed0 | 1060 | case R_390_PLT32: |
5236c819 MS |
1061 | case R_390_PLTOFF16: |
1062 | case R_390_PLTOFF32: | |
a85d7ed0 | 1063 | /* This symbol requires a procedure linkage table entry. We |
26e41594 AM |
1064 | actually build the entry in adjust_dynamic_symbol, |
1065 | because this might be a case of linking PIC code which is | |
1066 | never referenced by a dynamic object, in which case we | |
1067 | don't need to generate a procedure linkage table entry | |
1068 | after all. */ | |
a85d7ed0 NC |
1069 | |
1070 | /* If this is a local symbol, we resolve it directly without | |
26e41594 | 1071 | creating a procedure linkage table entry. */ |
5236c819 MS |
1072 | if (h != NULL) |
1073 | { | |
1074 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1075 | h->plt.refcount += 1; | |
1076 | } | |
1077 | break; | |
a85d7ed0 | 1078 | |
5236c819 MS |
1079 | case R_390_GOTPLT12: |
1080 | case R_390_GOTPLT16: | |
bd1ea41b | 1081 | case R_390_GOTPLT20: |
5236c819 MS |
1082 | case R_390_GOTPLT32: |
1083 | case R_390_GOTPLTENT: | |
1084 | /* This symbol requires either a procedure linkage table entry | |
1085 | or an entry in the local got. We actually build the entry | |
1086 | in adjust_dynamic_symbol because whether this is really a | |
1087 | global reference can change and with it the fact if we have | |
1088 | to create a plt entry or a local got entry. To be able to | |
1089 | make a once global symbol a local one we have to keep track | |
1090 | of the number of gotplt references that exist for this | |
1091 | symbol. */ | |
1092 | if (h != NULL) | |
1093 | { | |
1094 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
1095 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1096 | h->plt.refcount += 1; | |
1097 | } | |
1098 | else | |
1099 | local_got_refcounts[r_symndx] += 1; | |
a85d7ed0 NC |
1100 | break; |
1101 | ||
69fc87f1 MS |
1102 | case R_390_TLS_LDM32: |
1103 | htab->tls_ldm_got.refcount += 1; | |
1104 | break; | |
1105 | ||
1106 | case R_390_TLS_IE32: | |
1107 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1108 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1109 | case R_390_TLS_GOTIE32: |
1110 | case R_390_TLS_IEENT: | |
1111 | if (info->shared) | |
1112 | info->flags |= DF_STATIC_TLS; | |
ae9a127f | 1113 | /* Fall through. */ |
69fc87f1 MS |
1114 | |
1115 | case R_390_GOT12: | |
26e41594 | 1116 | case R_390_GOT16: |
bd1ea41b | 1117 | case R_390_GOT20: |
69fc87f1 MS |
1118 | case R_390_GOT32: |
1119 | case R_390_GOTENT: | |
1120 | case R_390_TLS_GD32: | |
1121 | /* This symbol requires a global offset table entry. */ | |
1122 | switch (r_type) | |
1123 | { | |
1124 | default: | |
1125 | case R_390_GOT12: | |
1126 | case R_390_GOT16: | |
bd1ea41b | 1127 | case R_390_GOT20: |
69fc87f1 MS |
1128 | case R_390_GOT32: |
1129 | case R_390_GOTENT: | |
1130 | tls_type = GOT_NORMAL; | |
1131 | break; | |
1132 | case R_390_TLS_GD32: | |
1133 | tls_type = GOT_TLS_GD; | |
1134 | break; | |
1135 | case R_390_TLS_IE32: | |
1136 | case R_390_TLS_GOTIE32: | |
1137 | tls_type = GOT_TLS_IE; | |
1138 | break; | |
1139 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1140 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1141 | case R_390_TLS_IEENT: |
1142 | tls_type = GOT_TLS_IE_NLT; | |
1143 | break; | |
1144 | } | |
1145 | ||
1146 | if (h != NULL) | |
1147 | { | |
1148 | h->got.refcount += 1; | |
1149 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1150 | } | |
1151 | else | |
1152 | { | |
1153 | local_got_refcounts[r_symndx] += 1; | |
1154 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; | |
1155 | } | |
1156 | /* If a TLS symbol is accessed using IE at least once, | |
1157 | there is no point to use dynamic model for it. */ | |
1158 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1159 | { | |
1160 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1161 | { | |
1162 | (*_bfd_error_handler) | |
1163 | (_("%s: `%s' accessed both as normal and thread local symbol"), | |
1164 | bfd_archive_filename (abfd), h->root.root.string); | |
1165 | return FALSE; | |
1166 | } | |
1167 | if (old_tls_type > tls_type) | |
1168 | tls_type = old_tls_type; | |
1169 | } | |
1170 | ||
1171 | if (old_tls_type != tls_type) | |
1172 | { | |
1173 | if (h != NULL) | |
1174 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1175 | else | |
1176 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1177 | } | |
1178 | ||
1179 | if (r_type != R_390_TLS_IE32) | |
1180 | break; | |
ae9a127f | 1181 | /* Fall through. */ |
69fc87f1 MS |
1182 | |
1183 | case R_390_TLS_LE32: | |
1184 | if (!info->shared) | |
1185 | break; | |
1186 | info->flags |= DF_STATIC_TLS; | |
ae9a127f | 1187 | /* Fall through. */ |
69fc87f1 | 1188 | |
26e41594 AM |
1189 | case R_390_8: |
1190 | case R_390_16: | |
a85d7ed0 | 1191 | case R_390_32: |
26e41594 AM |
1192 | case R_390_PC16: |
1193 | case R_390_PC16DBL: | |
befc3abb | 1194 | case R_390_PC32DBL: |
a85d7ed0 | 1195 | case R_390_PC32: |
0451c93c MS |
1196 | if (h != NULL && !info->shared) |
1197 | { | |
1198 | /* If this reloc is in a read-only section, we might | |
1199 | need a copy reloc. We can't check reliably at this | |
1200 | stage whether the section is read-only, as input | |
1201 | sections have not yet been mapped to output sections. | |
1202 | Tentatively set the flag for now, and correct in | |
1203 | adjust_dynamic_symbol. */ | |
1204 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
ec338859 | 1205 | |
0451c93c MS |
1206 | /* We may need a .plt entry if the function this reloc |
1207 | refers to is in a shared lib. */ | |
1208 | h->plt.refcount += 1; | |
1209 | } | |
a85d7ed0 NC |
1210 | |
1211 | /* If we are creating a shared library, and this is a reloc | |
0451c93c MS |
1212 | against a global symbol, or a non PC relative reloc |
1213 | against a local symbol, then we need to copy the reloc | |
1214 | into the shared library. However, if we are linking with | |
1215 | -Bsymbolic, we do not need to copy a reloc against a | |
1216 | global symbol which is defined in an object we are | |
1217 | including in the link (i.e., DEF_REGULAR is set). At | |
1218 | this point we have not seen all the input files, so it is | |
1219 | possible that DEF_REGULAR is not set now but will be set | |
1220 | later (it is never cleared). In case of a weak definition, | |
1221 | DEF_REGULAR may be cleared later by a strong definition in | |
1222 | a shared library. We account for that possibility below by | |
1223 | storing information in the relocs_copied field of the hash | |
1224 | table entry. A similar situation occurs when creating | |
1225 | shared libraries and symbol visibility changes render the | |
1226 | symbol local. | |
1227 | ||
1228 | If on the other hand, we are creating an executable, we | |
1229 | may need to keep relocations for symbols satisfied by a | |
1230 | dynamic library if we manage to avoid copy relocs for the | |
1231 | symbol. */ | |
1232 | if ((info->shared | |
1233 | && (sec->flags & SEC_ALLOC) != 0 | |
ec338859 | 1234 | && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 |
0451c93c | 1235 | && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL |
befc3abb | 1236 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL |
0451c93c MS |
1237 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32) |
1238 | || (h != NULL | |
1239 | && (! info->symbolic | |
1240 | || h->root.type == bfd_link_hash_defweak | |
1241 | || (h->elf_link_hash_flags | |
1242 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
64285810 MS |
1243 | || (ELIMINATE_COPY_RELOCS |
1244 | && !info->shared | |
0451c93c MS |
1245 | && (sec->flags & SEC_ALLOC) != 0 |
1246 | && h != NULL | |
1247 | && (h->root.type == bfd_link_hash_defweak | |
1248 | || (h->elf_link_hash_flags | |
1249 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
a85d7ed0 | 1250 | { |
ec338859 AM |
1251 | struct elf_s390_dyn_relocs *p; |
1252 | struct elf_s390_dyn_relocs **head; | |
1253 | ||
0451c93c MS |
1254 | /* We must copy these reloc types into the output file. |
1255 | Create a reloc section in dynobj and make room for | |
1256 | this reloc. */ | |
a85d7ed0 NC |
1257 | if (sreloc == NULL) |
1258 | { | |
1259 | const char *name; | |
0451c93c | 1260 | bfd *dynobj; |
ec338859 | 1261 | |
a85d7ed0 NC |
1262 | name = (bfd_elf_string_from_elf_section |
1263 | (abfd, | |
1264 | elf_elfheader (abfd)->e_shstrndx, | |
1265 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1266 | if (name == NULL) | |
b34976b6 | 1267 | return FALSE; |
a85d7ed0 | 1268 | |
0451c93c MS |
1269 | if (strncmp (name, ".rela", 5) != 0 |
1270 | || strcmp (bfd_get_section_name (abfd, sec), | |
1271 | name + 5) != 0) | |
1272 | { | |
1273 | (*_bfd_error_handler) | |
1274 | (_("%s: bad relocation section name `%s\'"), | |
1275 | bfd_archive_filename (abfd), name); | |
1276 | } | |
1277 | ||
1278 | if (htab->elf.dynobj == NULL) | |
1279 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1280 | |
0451c93c | 1281 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
1282 | sreloc = bfd_get_section_by_name (dynobj, name); |
1283 | if (sreloc == NULL) | |
1284 | { | |
1285 | flagword flags; | |
1286 | ||
1287 | sreloc = bfd_make_section (dynobj, name); | |
1288 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1289 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1290 | if ((sec->flags & SEC_ALLOC) != 0) | |
1291 | flags |= SEC_ALLOC | SEC_LOAD; | |
1292 | if (sreloc == NULL | |
1293 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
1294 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
b34976b6 | 1295 | return FALSE; |
a85d7ed0 | 1296 | } |
0451c93c | 1297 | elf_section_data (sec)->sreloc = sreloc; |
a85d7ed0 NC |
1298 | } |
1299 | ||
0451c93c MS |
1300 | /* If this is a global symbol, we count the number of |
1301 | relocations we need for this symbol. */ | |
1302 | if (h != NULL) | |
a85d7ed0 | 1303 | { |
ec338859 | 1304 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1305 | } |
1306 | else | |
1307 | { | |
ec338859 AM |
1308 | /* Track dynamic relocs needed for local syms too. |
1309 | We really need local syms available to do this | |
1310 | easily. Oh well. */ | |
ec338859 | 1311 | asection *s; |
ae9a127f | 1312 | |
ec338859 AM |
1313 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
1314 | sec, r_symndx); | |
1315 | if (s == NULL) | |
b34976b6 | 1316 | return FALSE; |
ec338859 AM |
1317 | |
1318 | head = ((struct elf_s390_dyn_relocs **) | |
1319 | &elf_section_data (s)->local_dynrel); | |
1320 | } | |
1321 | ||
1322 | p = *head; | |
1323 | if (p == NULL || p->sec != sec) | |
1324 | { | |
1325 | bfd_size_type amt = sizeof *p; | |
ae9a127f | 1326 | |
ec338859 AM |
1327 | p = ((struct elf_s390_dyn_relocs *) |
1328 | bfd_alloc (htab->elf.dynobj, amt)); | |
1329 | if (p == NULL) | |
b34976b6 | 1330 | return FALSE; |
ec338859 AM |
1331 | p->next = *head; |
1332 | *head = p; | |
1333 | p->sec = sec; | |
1334 | p->count = 0; | |
1335 | p->pc_count = 0; | |
a85d7ed0 | 1336 | } |
ec338859 AM |
1337 | |
1338 | p->count += 1; | |
1339 | if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 | |
1340 | || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL | |
befc3abb | 1341 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL |
ec338859 AM |
1342 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32) |
1343 | p->pc_count += 1; | |
a85d7ed0 | 1344 | } |
a85d7ed0 | 1345 | break; |
ec338859 | 1346 | |
a85d7ed0 NC |
1347 | /* This relocation describes the C++ object vtable hierarchy. |
1348 | Reconstruct it for later use during GC. */ | |
26e41594 | 1349 | case R_390_GNU_VTINHERIT: |
c152c796 | 1350 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
26e41594 AM |
1351 | return FALSE; |
1352 | break; | |
ec338859 | 1353 | |
a85d7ed0 NC |
1354 | /* This relocation describes which C++ vtable entries are actually |
1355 | used. Record for later use during GC. */ | |
26e41594 | 1356 | case R_390_GNU_VTENTRY: |
c152c796 | 1357 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
26e41594 AM |
1358 | return FALSE; |
1359 | break; | |
ec338859 | 1360 | |
a85d7ed0 NC |
1361 | default: |
1362 | break; | |
1363 | } | |
1364 | } | |
1365 | ||
b34976b6 | 1366 | return TRUE; |
a85d7ed0 NC |
1367 | } |
1368 | ||
1369 | /* Return the section that should be marked against GC for a given | |
1370 | relocation. */ | |
1371 | ||
1372 | static asection * | |
1e2f5b6e AM |
1373 | elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
1374 | asection *sec; | |
a85d7ed0 NC |
1375 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1376 | Elf_Internal_Rela *rel; | |
1377 | struct elf_link_hash_entry *h; | |
1378 | Elf_Internal_Sym *sym; | |
1379 | { | |
1380 | if (h != NULL) | |
1381 | { | |
1382 | switch (ELF32_R_TYPE (rel->r_info)) | |
1383 | { | |
1384 | case R_390_GNU_VTINHERIT: | |
1385 | case R_390_GNU_VTENTRY: | |
1386 | break; | |
1387 | ||
1388 | default: | |
1389 | switch (h->root.type) | |
1390 | { | |
1391 | case bfd_link_hash_defined: | |
1392 | case bfd_link_hash_defweak: | |
1393 | return h->root.u.def.section; | |
1394 | ||
1395 | case bfd_link_hash_common: | |
1396 | return h->root.u.c.p->section; | |
1397 | ||
1398 | default: | |
1399 | break; | |
1400 | } | |
1401 | } | |
1402 | } | |
1403 | else | |
1e2f5b6e | 1404 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
a85d7ed0 NC |
1405 | |
1406 | return NULL; | |
1407 | } | |
1408 | ||
1409 | /* Update the got entry reference counts for the section being removed. */ | |
1410 | ||
b34976b6 | 1411 | static bfd_boolean |
a85d7ed0 | 1412 | elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
0451c93c MS |
1413 | bfd *abfd; |
1414 | struct bfd_link_info *info; | |
1415 | asection *sec; | |
1416 | const Elf_Internal_Rela *relocs; | |
a85d7ed0 NC |
1417 | { |
1418 | Elf_Internal_Shdr *symtab_hdr; | |
1419 | struct elf_link_hash_entry **sym_hashes; | |
1420 | bfd_signed_vma *local_got_refcounts; | |
1421 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1422 | |
ec338859 | 1423 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1424 | |
0451c93c MS |
1425 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1426 | sym_hashes = elf_sym_hashes (abfd); | |
1427 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1428 | |
1429 | relend = relocs + sec->reloc_count; | |
1430 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1431 | { |
26e41594 AM |
1432 | unsigned long r_symndx; |
1433 | unsigned int r_type; | |
1434 | struct elf_link_hash_entry *h = NULL; | |
1435 | ||
5236c819 | 1436 | r_symndx = ELF32_R_SYM (rel->r_info); |
26e41594 AM |
1437 | if (r_symndx >= symtab_hdr->sh_info) |
1438 | { | |
1439 | struct elf_s390_link_hash_entry *eh; | |
1440 | struct elf_s390_dyn_relocs **pp; | |
1441 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1442 | |
26e41594 AM |
1443 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1444 | eh = (struct elf_s390_link_hash_entry *) h; | |
5236c819 | 1445 | |
26e41594 AM |
1446 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1447 | if (p->sec == sec) | |
1448 | { | |
1449 | /* Everything must go for SEC. */ | |
1450 | *pp = p->next; | |
1451 | break; | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | r_type = ELF32_R_TYPE (rel->r_info); | |
1456 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1457 | switch (r_type) |
5236c819 | 1458 | { |
69fc87f1 MS |
1459 | case R_390_TLS_LDM32: |
1460 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1461 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1462 | break; | |
1463 | ||
1464 | case R_390_TLS_GD32: | |
1465 | case R_390_TLS_IE32: | |
1466 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1467 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1468 | case R_390_TLS_GOTIE32: |
1469 | case R_390_TLS_IEENT: | |
5236c819 MS |
1470 | case R_390_GOT12: |
1471 | case R_390_GOT16: | |
bd1ea41b | 1472 | case R_390_GOT20: |
5236c819 MS |
1473 | case R_390_GOT32: |
1474 | case R_390_GOTOFF16: | |
1475 | case R_390_GOTOFF32: | |
1476 | case R_390_GOTPC: | |
1477 | case R_390_GOTPCDBL: | |
1478 | case R_390_GOTENT: | |
1479 | if (h != NULL) | |
1480 | { | |
1481 | if (h->got.refcount > 0) | |
1482 | h->got.refcount -= 1; | |
1483 | } | |
1484 | else if (local_got_refcounts != NULL) | |
1485 | { | |
1486 | if (local_got_refcounts[r_symndx] > 0) | |
1487 | local_got_refcounts[r_symndx] -= 1; | |
1488 | } | |
26e41594 | 1489 | break; |
a85d7ed0 | 1490 | |
5236c819 MS |
1491 | case R_390_8: |
1492 | case R_390_12: | |
1493 | case R_390_16: | |
bd1ea41b | 1494 | case R_390_20: |
5236c819 MS |
1495 | case R_390_32: |
1496 | case R_390_PC16: | |
1497 | case R_390_PC16DBL: | |
1498 | case R_390_PC32DBL: | |
1499 | case R_390_PC32: | |
26e41594 AM |
1500 | if (info->shared) |
1501 | break; | |
1502 | /* Fall through. */ | |
1503 | ||
69fc87f1 MS |
1504 | case R_390_PLT16DBL: |
1505 | case R_390_PLT32DBL: | |
1506 | case R_390_PLT32: | |
1507 | case R_390_PLTOFF16: | |
1508 | case R_390_PLTOFF32: | |
1509 | if (h != NULL) | |
1510 | { | |
1511 | if (h->plt.refcount > 0) | |
1512 | h->plt.refcount -= 1; | |
1513 | } | |
1514 | break; | |
1515 | ||
1516 | case R_390_GOTPLT12: | |
1517 | case R_390_GOTPLT16: | |
bd1ea41b | 1518 | case R_390_GOTPLT20: |
69fc87f1 MS |
1519 | case R_390_GOTPLT32: |
1520 | case R_390_GOTPLTENT: | |
1521 | if (h != NULL) | |
1522 | { | |
1523 | if (h->plt.refcount > 0) | |
1524 | { | |
1525 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1526 | h->plt.refcount -= 1; | |
1527 | } | |
1528 | } | |
1529 | else if (local_got_refcounts != NULL) | |
1530 | { | |
1531 | if (local_got_refcounts[r_symndx] > 0) | |
1532 | local_got_refcounts[r_symndx] -= 1; | |
1533 | } | |
1534 | break; | |
1535 | ||
5236c819 MS |
1536 | default: |
1537 | break; | |
1538 | } | |
1539 | } | |
a85d7ed0 | 1540 | |
b34976b6 | 1541 | return TRUE; |
a85d7ed0 NC |
1542 | } |
1543 | ||
5236c819 MS |
1544 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1545 | entry but we found we will not create any. Called when we find we will | |
1546 | not have any PLT for this symbol, by for example | |
1547 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1548 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1549 | created (we're only linking static objects). */ | |
1550 | ||
1551 | static void | |
1552 | elf_s390_adjust_gotplt (h) | |
1553 | struct elf_s390_link_hash_entry *h; | |
1554 | { | |
1555 | if (h->elf.root.type == bfd_link_hash_warning) | |
1556 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1557 | ||
1558 | if (h->gotplt_refcount <= 0) | |
1559 | return; | |
1560 | ||
1561 | /* We simply add the number of gotplt references to the number | |
1562 | * of got references for this symbol. */ | |
1563 | h->elf.got.refcount += h->gotplt_refcount; | |
1564 | h->gotplt_refcount = -1; | |
1565 | } | |
1566 | ||
a85d7ed0 NC |
1567 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1568 | regular object. The current definition is in some section of the | |
1569 | dynamic object, but we're not including those sections. We have to | |
1570 | change the definition to something the rest of the link can | |
1571 | understand. */ | |
1572 | ||
b34976b6 | 1573 | static bfd_boolean |
a85d7ed0 NC |
1574 | elf_s390_adjust_dynamic_symbol (info, h) |
1575 | struct bfd_link_info *info; | |
1576 | struct elf_link_hash_entry *h; | |
1577 | { | |
0451c93c | 1578 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1579 | asection *s; |
1580 | unsigned int power_of_two; | |
1581 | ||
a85d7ed0 NC |
1582 | /* If this is a function, put it in the procedure linkage table. We |
1583 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1584 | (although we could actually do it here). */ |
a85d7ed0 NC |
1585 | if (h->type == STT_FUNC |
1586 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1587 | { | |
0451c93c MS |
1588 | if (h->plt.refcount <= 0 |
1589 | || (! info->shared | |
1590 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
f9cd9119 MS |
1591 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
1592 | && h->root.type != bfd_link_hash_undefweak | |
1593 | && h->root.type != bfd_link_hash_undefined)) | |
a85d7ed0 NC |
1594 | { |
1595 | /* This case can occur if we saw a PLT32 reloc in an input | |
26e41594 AM |
1596 | file, but the symbol was never referred to by a dynamic |
1597 | object, or if all references were garbage collected. In | |
a85d7ed0 NC |
1598 | such a case, we don't actually need to build a procedure |
1599 | linkage table, and we can just do a PC32 reloc instead. */ | |
1600 | h->plt.offset = (bfd_vma) -1; | |
1601 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1602 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1603 | } |
1604 | ||
b34976b6 | 1605 | return TRUE; |
a85d7ed0 | 1606 | } |
bbd7ec4a | 1607 | else |
0451c93c MS |
1608 | /* It's possible that we incorrectly decided a .plt reloc was |
1609 | needed for an R_390_PC32 reloc to a non-function sym in | |
1610 | check_relocs. We can't decide accurately between function and | |
1611 | non-function syms in check-relocs; Objects loaded later in | |
1612 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1613 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1614 | |
1615 | /* If this is a weak symbol, and there is a real definition, the | |
1616 | processor independent code will have arranged for us to see the | |
1617 | real definition first, and we can just use the same value. */ | |
1618 | if (h->weakdef != NULL) | |
1619 | { | |
1620 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1621 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1622 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1623 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
64285810 MS |
1624 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
1625 | h->elf_link_hash_flags | |
1626 | = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) | |
1627 | | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); | |
b34976b6 | 1628 | return TRUE; |
a85d7ed0 NC |
1629 | } |
1630 | ||
1631 | /* This is a reference to a symbol defined by a dynamic object which | |
1632 | is not a function. */ | |
1633 | ||
1634 | /* If we are creating a shared library, we must presume that the | |
1635 | only references to the symbol are via the global offset table. | |
1636 | For such cases we need not do anything here; the relocations will | |
1637 | be handled correctly by relocate_section. */ | |
1638 | if (info->shared) | |
b34976b6 | 1639 | return TRUE; |
a85d7ed0 NC |
1640 | |
1641 | /* If there are no references to this symbol that do not use the | |
1642 | GOT, we don't need to generate a copy reloc. */ | |
1643 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
b34976b6 | 1644 | return TRUE; |
a85d7ed0 | 1645 | |
0451c93c MS |
1646 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1647 | if (info->nocopyreloc) | |
1648 | { | |
1649 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1650 | return TRUE; |
0451c93c MS |
1651 | } |
1652 | ||
64285810 | 1653 | if (ELIMINATE_COPY_RELOCS) |
0451c93c | 1654 | { |
64285810 MS |
1655 | struct elf_s390_link_hash_entry * eh; |
1656 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1657 | |
64285810 MS |
1658 | eh = (struct elf_s390_link_hash_entry *) h; |
1659 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1660 | { | |
1661 | s = p->sec->output_section; | |
1662 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1663 | break; | |
1664 | } | |
1665 | ||
1666 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1667 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1668 | if (p == NULL) | |
1669 | { | |
1670 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1671 | return TRUE; | |
1672 | } | |
0451c93c MS |
1673 | } |
1674 | ||
a85d7ed0 NC |
1675 | /* We must allocate the symbol in our .dynbss section, which will |
1676 | become part of the .bss section of the executable. There will be | |
1677 | an entry for this symbol in the .dynsym section. The dynamic | |
1678 | object will contain position independent code, so all references | |
1679 | from the dynamic object to this symbol will go through the global | |
1680 | offset table. The dynamic linker will use the .dynsym entry to | |
1681 | determine the address it must put in the global offset table, so | |
1682 | both the dynamic object and the regular object will refer to the | |
1683 | same memory location for the variable. */ | |
1684 | ||
0451c93c | 1685 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1686 | |
0451c93c MS |
1687 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1688 | copy the initial value out of the dynamic object and into the | |
1689 | runtime process image. */ | |
a85d7ed0 NC |
1690 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1691 | { | |
eea6121a | 1692 | htab->srelbss->size += sizeof (Elf32_External_Rela); |
a85d7ed0 NC |
1693 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1694 | } | |
1695 | ||
1696 | /* We need to figure out the alignment required for this symbol. I | |
1697 | have no idea how ELF linkers handle this. */ | |
1698 | power_of_two = bfd_log2 (h->size); | |
1699 | if (power_of_two > 3) | |
1700 | power_of_two = 3; | |
1701 | ||
1702 | /* Apply the required alignment. */ | |
0451c93c | 1703 | s = htab->sdynbss; |
eea6121a | 1704 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
0451c93c | 1705 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
a85d7ed0 | 1706 | { |
0451c93c | 1707 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1708 | return FALSE; |
a85d7ed0 NC |
1709 | } |
1710 | ||
1711 | /* Define the symbol as being at this point in the section. */ | |
1712 | h->root.u.def.section = s; | |
eea6121a | 1713 | h->root.u.def.value = s->size; |
a85d7ed0 NC |
1714 | |
1715 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1716 | s->size += h->size; |
a85d7ed0 | 1717 | |
b34976b6 | 1718 | return TRUE; |
a85d7ed0 NC |
1719 | } |
1720 | ||
0451c93c MS |
1721 | /* Allocate space in .plt, .got and associated reloc sections for |
1722 | dynamic relocs. */ | |
1723 | ||
b34976b6 | 1724 | static bfd_boolean |
0451c93c MS |
1725 | allocate_dynrelocs (h, inf) |
1726 | struct elf_link_hash_entry *h; | |
1727 | PTR inf; | |
1728 | { | |
1729 | struct bfd_link_info *info; | |
1730 | struct elf_s390_link_hash_table *htab; | |
1731 | struct elf_s390_link_hash_entry *eh; | |
1732 | struct elf_s390_dyn_relocs *p; | |
1733 | ||
e92d460e | 1734 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1735 | return TRUE; |
0451c93c | 1736 | |
e92d460e | 1737 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1738 | /* When warning symbols are created, they **replace** the "real" |
1739 | entry in the hash table, thus we never get to see the real | |
1740 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1741 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1742 | ||
0451c93c MS |
1743 | info = (struct bfd_link_info *) inf; |
1744 | htab = elf_s390_hash_table (info); | |
1745 | ||
1746 | if (htab->elf.dynamic_sections_created | |
82058a73 MS |
1747 | && h->plt.refcount > 0 |
1748 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1749 | || h->root.type != bfd_link_hash_undefweak)) | |
0451c93c MS |
1750 | { |
1751 | /* Make sure this symbol is output as a dynamic symbol. | |
1752 | Undefined weak syms won't yet be marked as dynamic. */ | |
1753 | if (h->dynindx == -1 | |
1754 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1755 | { | |
c152c796 | 1756 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1757 | return FALSE; |
0451c93c MS |
1758 | } |
1759 | ||
82058a73 | 1760 | if (info->shared |
4ec72bde | 1761 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
0451c93c MS |
1762 | { |
1763 | asection *s = htab->splt; | |
1764 | ||
1765 | /* If this is the first .plt entry, make room for the special | |
1766 | first entry. */ | |
eea6121a AM |
1767 | if (s->size == 0) |
1768 | s->size += PLT_FIRST_ENTRY_SIZE; | |
0451c93c | 1769 | |
eea6121a | 1770 | h->plt.offset = s->size; |
0451c93c MS |
1771 | |
1772 | /* If this symbol is not defined in a regular file, and we are | |
1773 | not generating a shared library, then set the symbol to this | |
1774 | location in the .plt. This is required to make function | |
1775 | pointers compare as equal between the normal executable and | |
1776 | the shared library. */ | |
1777 | if (! info->shared | |
1778 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1779 | { | |
1780 | h->root.u.def.section = s; | |
1781 | h->root.u.def.value = h->plt.offset; | |
1782 | } | |
ec338859 | 1783 | |
0451c93c | 1784 | /* Make room for this entry. */ |
eea6121a | 1785 | s->size += PLT_ENTRY_SIZE; |
ec338859 | 1786 | |
0451c93c MS |
1787 | /* We also need to make an entry in the .got.plt section, which |
1788 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1789 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
0451c93c MS |
1790 | |
1791 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1792 | htab->srelplt->size += sizeof (Elf32_External_Rela); |
0451c93c MS |
1793 | } |
1794 | else | |
1795 | { | |
1796 | h->plt.offset = (bfd_vma) -1; | |
1797 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1798 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c | 1799 | } |
ec338859 | 1800 | } |
0451c93c MS |
1801 | else |
1802 | { | |
1803 | h->plt.offset = (bfd_vma) -1; | |
1804 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
5236c819 | 1805 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
ec338859 AM |
1806 | } |
1807 | ||
69fc87f1 MS |
1808 | /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to |
1809 | the binary, we can optimize a bit. IE32 and GOTIE32 get converted | |
1810 | to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT | |
1811 | we can save the dynamic TLS relocation. */ | |
1812 | if (h->got.refcount > 0 | |
1813 | && !info->shared | |
1814 | && h->dynindx == -1 | |
1815 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
0451c93c | 1816 | { |
69fc87f1 MS |
1817 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) |
1818 | /* For the GOTIE access without a literal pool entry the offset has | |
1819 | to be stored somewhere. The immediate value in the instruction | |
1820 | is not bit enough so the value is stored in the got. */ | |
1821 | { | |
eea6121a AM |
1822 | h->got.offset = htab->sgot->size; |
1823 | htab->sgot->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1824 | } |
1825 | else | |
1826 | h->got.offset = (bfd_vma) -1; | |
1827 | } | |
1828 | else if (h->got.refcount > 0) | |
1829 | { | |
0451c93c | 1830 | asection *s; |
b34976b6 | 1831 | bfd_boolean dyn; |
69fc87f1 | 1832 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1833 | |
1834 | /* Make sure this symbol is output as a dynamic symbol. | |
1835 | Undefined weak syms won't yet be marked as dynamic. */ | |
1836 | if (h->dynindx == -1 | |
1837 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1838 | { | |
c152c796 | 1839 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1840 | return FALSE; |
0451c93c MS |
1841 | } |
1842 | ||
1843 | s = htab->sgot; | |
eea6121a AM |
1844 | h->got.offset = s->size; |
1845 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1846 | /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ |
1847 | if (tls_type == GOT_TLS_GD) | |
eea6121a | 1848 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 1849 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1850 | /* R_390_TLS_IE32 needs one dynamic relocation, |
1851 | R_390_TLS_GD32 needs one if local symbol and two if global. */ | |
1852 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1853 | || tls_type >= GOT_TLS_IE) | |
eea6121a | 1854 | htab->srelgot->size += sizeof (Elf32_External_Rela); |
69fc87f1 | 1855 | else if (tls_type == GOT_TLS_GD) |
eea6121a | 1856 | htab->srelgot->size += 2 * sizeof (Elf32_External_Rela); |
82058a73 MS |
1857 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1858 | || h->root.type != bfd_link_hash_undefweak) | |
1859 | && (info->shared | |
1860 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1861 | htab->srelgot->size += sizeof (Elf32_External_Rela); |
0451c93c MS |
1862 | } |
1863 | else | |
1864 | h->got.offset = (bfd_vma) -1; | |
1865 | ||
1866 | eh = (struct elf_s390_link_hash_entry *) h; | |
1867 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1868 | return TRUE; |
0451c93c MS |
1869 | |
1870 | /* In the shared -Bsymbolic case, discard space allocated for | |
1871 | dynamic pc-relative relocs against symbols which turn out to be | |
1872 | defined in regular objects. For the normal shared case, discard | |
1873 | space for pc-relative relocs that have become local due to symbol | |
1874 | visibility changes. */ | |
1875 | ||
1876 | if (info->shared) | |
1877 | { | |
1c3ff0f2 | 1878 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
0451c93c MS |
1879 | { |
1880 | struct elf_s390_dyn_relocs **pp; | |
1881 | ||
1882 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1883 | { | |
1884 | p->count -= p->pc_count; | |
1885 | p->pc_count = 0; | |
1886 | if (p->count == 0) | |
1887 | *pp = p->next; | |
1888 | else | |
1889 | pp = &p->next; | |
1890 | } | |
1891 | } | |
82058a73 MS |
1892 | |
1893 | /* Also discard relocs on undefined weak syms with non-default | |
1894 | visibility. */ | |
1895 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1896 | && h->root.type == bfd_link_hash_undefweak) | |
1897 | eh->dyn_relocs = NULL; | |
0451c93c | 1898 | } |
64285810 | 1899 | else if (ELIMINATE_COPY_RELOCS) |
0451c93c MS |
1900 | { |
1901 | /* For the non-shared case, discard space for relocs against | |
1902 | symbols which turn out to need copy relocs or are not | |
1903 | dynamic. */ | |
1904 | ||
1905 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1906 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1907 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1908 | || (htab->elf.dynamic_sections_created | |
1909 | && (h->root.type == bfd_link_hash_undefweak | |
1910 | || h->root.type == bfd_link_hash_undefined)))) | |
1911 | { | |
1912 | /* Make sure this symbol is output as a dynamic symbol. | |
1913 | Undefined weak syms won't yet be marked as dynamic. */ | |
1914 | if (h->dynindx == -1 | |
1915 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1916 | { | |
c152c796 | 1917 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1918 | return FALSE; |
0451c93c MS |
1919 | } |
1920 | ||
1921 | /* If that succeeded, we know we'll be keeping all the | |
1922 | relocs. */ | |
1923 | if (h->dynindx != -1) | |
1924 | goto keep; | |
1925 | } | |
1926 | ||
1927 | eh->dyn_relocs = NULL; | |
1928 | ||
ec338859 | 1929 | keep: ; |
0451c93c MS |
1930 | } |
1931 | ||
1932 | /* Finally, allocate space. */ | |
1933 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1934 | { | |
1935 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
ae9a127f | 1936 | |
eea6121a | 1937 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
0451c93c MS |
1938 | } |
1939 | ||
b34976b6 | 1940 | return TRUE; |
0451c93c MS |
1941 | } |
1942 | ||
1943 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1944 | ||
b34976b6 | 1945 | static bfd_boolean |
0451c93c MS |
1946 | readonly_dynrelocs (h, inf) |
1947 | struct elf_link_hash_entry *h; | |
1948 | PTR inf; | |
1949 | { | |
1950 | struct elf_s390_link_hash_entry *eh; | |
1951 | struct elf_s390_dyn_relocs *p; | |
1952 | ||
e92d460e AM |
1953 | if (h->root.type == bfd_link_hash_warning) |
1954 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1955 | ||
0451c93c MS |
1956 | eh = (struct elf_s390_link_hash_entry *) h; |
1957 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1958 | { | |
1959 | asection *s = p->sec->output_section; | |
1960 | ||
1961 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1962 | { | |
1963 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1964 | ||
1965 | info->flags |= DF_TEXTREL; | |
1966 | ||
1967 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1968 | return FALSE; |
0451c93c MS |
1969 | } |
1970 | } | |
b34976b6 | 1971 | return TRUE; |
0451c93c MS |
1972 | } |
1973 | ||
a85d7ed0 NC |
1974 | /* Set the sizes of the dynamic sections. */ |
1975 | ||
b34976b6 | 1976 | static bfd_boolean |
a85d7ed0 | 1977 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1978 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1979 | struct bfd_link_info *info; |
1980 | { | |
0451c93c | 1981 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1982 | bfd *dynobj; |
1983 | asection *s; | |
b34976b6 | 1984 | bfd_boolean relocs; |
0451c93c | 1985 | bfd *ibfd; |
a85d7ed0 | 1986 | |
0451c93c MS |
1987 | htab = elf_s390_hash_table (info); |
1988 | dynobj = htab->elf.dynobj; | |
1989 | if (dynobj == NULL) | |
1990 | abort (); | |
a85d7ed0 | 1991 | |
0451c93c | 1992 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1993 | { |
1994 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1995 | if (info->executable) |
a85d7ed0 NC |
1996 | { |
1997 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1998 | if (s == NULL) |
1999 | abort (); | |
eea6121a | 2000 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
a85d7ed0 NC |
2001 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2002 | } | |
2003 | } | |
a85d7ed0 | 2004 | |
0451c93c MS |
2005 | /* Set up .got offsets for local syms, and space for local dynamic |
2006 | relocs. */ | |
2007 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 2008 | { |
0451c93c MS |
2009 | bfd_signed_vma *local_got; |
2010 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 2011 | char *local_tls_type; |
0451c93c MS |
2012 | bfd_size_type locsymcount; |
2013 | Elf_Internal_Shdr *symtab_hdr; | |
2014 | asection *srela; | |
a85d7ed0 | 2015 | |
0451c93c | 2016 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
a85d7ed0 NC |
2017 | continue; |
2018 | ||
0451c93c | 2019 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 2020 | { |
ec338859 | 2021 | struct elf_s390_dyn_relocs *p; |
0451c93c | 2022 | |
ec338859 AM |
2023 | for (p = *((struct elf_s390_dyn_relocs **) |
2024 | &elf_section_data (s)->local_dynrel); | |
2025 | p != NULL; | |
2026 | p = p->next) | |
a85d7ed0 | 2027 | { |
ec338859 AM |
2028 | if (!bfd_is_abs_section (p->sec) |
2029 | && bfd_is_abs_section (p->sec->output_section)) | |
2030 | { | |
2031 | /* Input section has been discarded, either because | |
2032 | it is a copy of a linkonce section or due to | |
2033 | linker script /DISCARD/, so we'll be discarding | |
2034 | the relocs too. */ | |
2035 | } | |
248866a8 | 2036 | else if (p->count != 0) |
ec338859 AM |
2037 | { |
2038 | srela = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2039 | srela->size += p->count * sizeof (Elf32_External_Rela); |
248866a8 AM |
2040 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2041 | info->flags |= DF_TEXTREL; | |
ec338859 | 2042 | } |
a85d7ed0 NC |
2043 | } |
2044 | } | |
0451c93c MS |
2045 | |
2046 | local_got = elf_local_got_refcounts (ibfd); | |
2047 | if (!local_got) | |
2048 | continue; | |
2049 | ||
2050 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2051 | locsymcount = symtab_hdr->sh_info; | |
2052 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 2053 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
2054 | s = htab->sgot; |
2055 | srela = htab->srelgot; | |
69fc87f1 | 2056 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 2057 | { |
0451c93c | 2058 | if (*local_got > 0) |
a85d7ed0 | 2059 | { |
eea6121a AM |
2060 | *local_got = s->size; |
2061 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 | 2062 | if (*local_tls_type == GOT_TLS_GD) |
eea6121a | 2063 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 2064 | if (info->shared) |
eea6121a | 2065 | srela->size += sizeof (Elf32_External_Rela); |
a85d7ed0 NC |
2066 | } |
2067 | else | |
0451c93c MS |
2068 | *local_got = (bfd_vma) -1; |
2069 | } | |
2070 | } | |
2071 | ||
69fc87f1 MS |
2072 | if (htab->tls_ldm_got.refcount > 0) |
2073 | { | |
2074 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 | |
2075 | relocs. */ | |
eea6121a AM |
2076 | htab->tls_ldm_got.offset = htab->sgot->size; |
2077 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
2078 | htab->srelgot->size += sizeof (Elf32_External_Rela); | |
69fc87f1 MS |
2079 | } |
2080 | else | |
2081 | htab->tls_ldm_got.offset = -1; | |
2082 | ||
0451c93c MS |
2083 | /* Allocate global sym .plt and .got entries, and space for global |
2084 | sym dynamic relocs. */ | |
2085 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2086 | ||
2087 | /* We now have determined the sizes of the various dynamic sections. | |
2088 | Allocate memory for them. */ | |
b34976b6 | 2089 | relocs = FALSE; |
0451c93c MS |
2090 | for (s = dynobj->sections; s != NULL; s = s->next) |
2091 | { | |
2092 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2093 | continue; | |
2094 | ||
2095 | if (s == htab->splt | |
2096 | || s == htab->sgot | |
2097 | || s == htab->sgotplt) | |
2098 | { | |
2099 | /* Strip this section if we don't need it; see the | |
2100 | comment below. */ | |
a85d7ed0 | 2101 | } |
0451c93c MS |
2102 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
2103 | { | |
eea6121a | 2104 | if (s->size != 0) |
b34976b6 | 2105 | relocs = TRUE; |
ec338859 | 2106 | |
0451c93c MS |
2107 | /* We use the reloc_count field as a counter if we need |
2108 | to copy relocs into the output file. */ | |
2109 | s->reloc_count = 0; | |
2110 | } | |
2111 | else | |
a85d7ed0 NC |
2112 | { |
2113 | /* It's not one of our sections, so don't allocate space. */ | |
2114 | continue; | |
2115 | } | |
2116 | ||
eea6121a | 2117 | if (s->size == 0) |
a85d7ed0 | 2118 | { |
0451c93c MS |
2119 | /* If we don't need this section, strip it from the |
2120 | output file. This is to handle .rela.bss and | |
2121 | .rela.plt. We must create it in | |
2122 | create_dynamic_sections, because it must be created | |
2123 | before the linker maps input sections to output | |
2124 | sections. The linker does that before | |
2125 | adjust_dynamic_symbol is called, and it is that | |
2126 | function which decides whether anything needs to go | |
2127 | into these sections. */ | |
2128 | ||
a85d7ed0 NC |
2129 | _bfd_strip_section_from_output (info, s); |
2130 | continue; | |
2131 | } | |
2132 | ||
0451c93c MS |
2133 | /* Allocate memory for the section contents. We use bfd_zalloc |
2134 | here in case unused entries are not reclaimed before the | |
2135 | section's contents are written out. This should not happen, | |
2136 | but this way if it does, we get a R_390_NONE reloc instead | |
2137 | of garbage. */ | |
eea6121a | 2138 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
0451c93c | 2139 | if (s->contents == NULL) |
b34976b6 | 2140 | return FALSE; |
a85d7ed0 | 2141 | } |
ec338859 | 2142 | |
0451c93c | 2143 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2144 | { |
2145 | /* Add some entries to the .dynamic section. We fill in the | |
2146 | values later, in elf_s390_finish_dynamic_sections, but we | |
2147 | must add the entries now so that we get the correct size for | |
2148 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2149 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2150 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2151 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
ec338859 | 2152 | |
36af4a4e | 2153 | if (info->executable) |
a85d7ed0 | 2154 | { |
dc810e39 | 2155 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2156 | return FALSE; |
a85d7ed0 | 2157 | } |
ec338859 | 2158 | |
eea6121a | 2159 | if (htab->splt->size != 0) |
a85d7ed0 | 2160 | { |
dc810e39 AM |
2161 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2162 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2163 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2164 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2165 | return FALSE; |
a85d7ed0 | 2166 | } |
ec338859 | 2167 | |
a85d7ed0 | 2168 | if (relocs) |
26e41594 AM |
2169 | { |
2170 | if (!add_dynamic_entry (DT_RELA, 0) | |
2171 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2172 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 2173 | return FALSE; |
a85d7ed0 | 2174 | |
0451c93c MS |
2175 | /* If any dynamic relocs apply to a read-only section, |
2176 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2177 | if ((info->flags & DF_TEXTREL) == 0) |
2178 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2179 | (PTR) info); | |
ec338859 | 2180 | |
0451c93c MS |
2181 | if ((info->flags & DF_TEXTREL) != 0) |
2182 | { | |
2183 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2184 | return FALSE; |
0451c93c | 2185 | } |
a85d7ed0 NC |
2186 | } |
2187 | } | |
dc810e39 | 2188 | #undef add_dynamic_entry |
ec338859 | 2189 | |
b34976b6 | 2190 | return TRUE; |
a85d7ed0 NC |
2191 | } |
2192 | ||
69fc87f1 MS |
2193 | /* Return the base VMA address which should be subtracted from real addresses |
2194 | when resolving @dtpoff relocation. | |
2195 | This is PT_TLS segment p_vaddr. */ | |
2196 | ||
2197 | static bfd_vma | |
2198 | dtpoff_base (info) | |
2199 | struct bfd_link_info *info; | |
2200 | { | |
e1918d23 AM |
2201 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2202 | if (elf_hash_table (info)->tls_sec == NULL) | |
69fc87f1 | 2203 | return 0; |
e1918d23 | 2204 | return elf_hash_table (info)->tls_sec->vma; |
69fc87f1 MS |
2205 | } |
2206 | ||
2207 | /* Return the relocation value for @tpoff relocation | |
2208 | if STT_TLS virtual address is ADDRESS. */ | |
2209 | ||
2210 | static bfd_vma | |
2211 | tpoff (info, address) | |
2212 | struct bfd_link_info *info; | |
2213 | bfd_vma address; | |
2214 | { | |
e1918d23 | 2215 | struct elf_link_hash_table *htab = elf_hash_table (info); |
69fc87f1 | 2216 | |
e1918d23 AM |
2217 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2218 | if (htab->tls_sec == NULL) | |
69fc87f1 | 2219 | return 0; |
e1918d23 | 2220 | return htab->tls_size + htab->tls_sec->vma - address; |
69fc87f1 MS |
2221 | } |
2222 | ||
2223 | /* Complain if TLS instruction relocation is against an invalid | |
2224 | instruction. */ | |
2225 | ||
2226 | static void | |
2227 | invalid_tls_insn (input_bfd, input_section, rel) | |
2228 | bfd *input_bfd; | |
2229 | asection *input_section; | |
2230 | Elf_Internal_Rela *rel; | |
2231 | { | |
2232 | reloc_howto_type *howto; | |
2233 | ||
2234 | howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
2235 | (*_bfd_error_handler) | |
2236 | (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"), | |
2237 | bfd_archive_filename (input_bfd), | |
2238 | bfd_get_section_name (input_bfd, input_section), | |
2239 | (long) rel->r_offset, | |
2240 | howto->name); | |
2241 | } | |
2242 | ||
a85d7ed0 NC |
2243 | /* Relocate a 390 ELF section. */ |
2244 | ||
b34976b6 | 2245 | static bfd_boolean |
a85d7ed0 NC |
2246 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2247 | contents, relocs, local_syms, local_sections) | |
2248 | bfd *output_bfd; | |
2249 | struct bfd_link_info *info; | |
2250 | bfd *input_bfd; | |
2251 | asection *input_section; | |
2252 | bfd_byte *contents; | |
2253 | Elf_Internal_Rela *relocs; | |
2254 | Elf_Internal_Sym *local_syms; | |
2255 | asection **local_sections; | |
2256 | { | |
0451c93c | 2257 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2258 | Elf_Internal_Shdr *symtab_hdr; |
2259 | struct elf_link_hash_entry **sym_hashes; | |
2260 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2261 | Elf_Internal_Rela *rel; |
2262 | Elf_Internal_Rela *relend; | |
2263 | ||
1049f94e | 2264 | if (info->relocatable) |
b34976b6 | 2265 | return TRUE; |
b491616a | 2266 | |
0451c93c | 2267 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2268 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2269 | sym_hashes = elf_sym_hashes (input_bfd); | |
2270 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2271 | ||
a85d7ed0 NC |
2272 | rel = relocs; |
2273 | relend = relocs + input_section->reloc_count; | |
2274 | for (; rel < relend; rel++) | |
2275 | { | |
5236c819 | 2276 | unsigned int r_type; |
a85d7ed0 NC |
2277 | reloc_howto_type *howto; |
2278 | unsigned long r_symndx; | |
2279 | struct elf_link_hash_entry *h; | |
2280 | Elf_Internal_Sym *sym; | |
2281 | asection *sec; | |
0451c93c | 2282 | bfd_vma off; |
a85d7ed0 | 2283 | bfd_vma relocation; |
b34976b6 | 2284 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2285 | bfd_reloc_status_type r; |
69fc87f1 | 2286 | int tls_type; |
ec338859 | 2287 | |
a85d7ed0 NC |
2288 | r_type = ELF32_R_TYPE (rel->r_info); |
2289 | if (r_type == (int) R_390_GNU_VTINHERIT | |
26e41594 AM |
2290 | || r_type == (int) R_390_GNU_VTENTRY) |
2291 | continue; | |
5236c819 | 2292 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2293 | { |
2294 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2295 | return FALSE; |
a85d7ed0 | 2296 | } |
ec338859 | 2297 | |
b491616a | 2298 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2299 | r_symndx = ELF32_R_SYM (rel->r_info); |
5236c819 MS |
2300 | |
2301 | /* This is a final link. */ | |
a85d7ed0 NC |
2302 | h = NULL; |
2303 | sym = NULL; | |
2304 | sec = NULL; | |
b34976b6 | 2305 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2306 | if (r_symndx < symtab_hdr->sh_info) |
2307 | { | |
2308 | sym = local_syms + r_symndx; | |
2309 | sec = local_sections[r_symndx]; | |
8517fae7 | 2310 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
a85d7ed0 NC |
2311 | } |
2312 | else | |
2313 | { | |
560e09e9 | 2314 | bfd_boolean warned ATTRIBUTE_UNUSED; |
ec338859 | 2315 | |
b2a8e766 AM |
2316 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2317 | r_symndx, symtab_hdr, sym_hashes, | |
2318 | h, sec, relocation, | |
2319 | unresolved_reloc, warned); | |
a85d7ed0 | 2320 | } |
ec338859 | 2321 | |
a85d7ed0 NC |
2322 | switch (r_type) |
2323 | { | |
5236c819 MS |
2324 | case R_390_GOTPLT12: |
2325 | case R_390_GOTPLT16: | |
bd1ea41b | 2326 | case R_390_GOTPLT20: |
5236c819 MS |
2327 | case R_390_GOTPLT32: |
2328 | case R_390_GOTPLTENT: | |
2329 | /* There are three cases for a GOTPLT relocation. 1) The | |
2330 | relocation is against the jump slot entry of a plt that | |
2331 | will get emitted to the output file. 2) The relocation | |
2332 | is against the jump slot of a plt entry that has been | |
2333 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2334 | as replacement. 3) The relocation is against a local symbol. | |
2335 | Cases 2) and 3) are the same as the GOT relocation code | |
2336 | so we just have to test for case 1 and fall through for | |
2337 | the other two. */ | |
2338 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2339 | { | |
2340 | bfd_vma plt_index; | |
2341 | ||
2342 | /* Calc. index no. | |
2343 | Current offset - size first entry / entry size. */ | |
2344 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2345 | PLT_ENTRY_SIZE; | |
26e41594 | 2346 | |
5236c819 MS |
2347 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2348 | addr & GOT addr. */ | |
2349 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2350 | unresolved_reloc = FALSE; | |
2351 | ||
2352 | if (r_type == R_390_GOTPLTENT) | |
2353 | relocation += htab->sgot->output_section->vma; | |
2354 | break; | |
2355 | } | |
2356 | /* Fall through. */ | |
2357 | ||
26e41594 AM |
2358 | case R_390_GOT12: |
2359 | case R_390_GOT16: | |
bd1ea41b | 2360 | case R_390_GOT20: |
26e41594 | 2361 | case R_390_GOT32: |
befc3abb | 2362 | case R_390_GOTENT: |
26e41594 AM |
2363 | /* Relocation is to the entry for this symbol in the global |
2364 | offset table. */ | |
0451c93c MS |
2365 | if (htab->sgot == NULL) |
2366 | abort (); | |
ec338859 | 2367 | |
26e41594 AM |
2368 | if (h != NULL) |
2369 | { | |
b34976b6 | 2370 | bfd_boolean dyn; |
ec338859 | 2371 | |
26e41594 | 2372 | off = h->got.offset; |
0451c93c | 2373 | dyn = htab->elf.dynamic_sections_created; |
4ec72bde | 2374 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
26e41594 AM |
2375 | || (info->shared |
2376 | && (info->symbolic | |
0451c93c MS |
2377 | || h->dynindx == -1 |
2378 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
82058a73 MS |
2379 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
2380 | || (ELF_ST_VISIBILITY (h->other) | |
2381 | && h->root.type == bfd_link_hash_undefweak)) | |
26e41594 AM |
2382 | { |
2383 | /* This is actually a static link, or it is a | |
2384 | -Bsymbolic link and the symbol is defined | |
2385 | locally, or the symbol was forced to be local | |
2386 | because of a version file. We must initialize | |
2387 | this entry in the global offset table. Since the | |
2388 | offset must always be a multiple of 2, we use the | |
2389 | least significant bit to record whether we have | |
2390 | initialized it already. | |
2391 | ||
2392 | When doing a dynamic link, we create a .rel.got | |
2393 | relocation entry to initialize the value. This | |
2394 | is done in the finish_dynamic_symbol routine. */ | |
2395 | if ((off & 1) != 0) | |
2396 | off &= ~1; | |
2397 | else | |
2398 | { | |
a85d7ed0 | 2399 | bfd_put_32 (output_bfd, relocation, |
0451c93c | 2400 | htab->sgot->contents + off); |
26e41594 AM |
2401 | h->got.offset |= 1; |
2402 | } | |
2403 | } | |
0451c93c | 2404 | else |
b34976b6 | 2405 | unresolved_reloc = FALSE; |
26e41594 AM |
2406 | } |
2407 | else | |
2408 | { | |
0451c93c MS |
2409 | if (local_got_offsets == NULL) |
2410 | abort (); | |
a85d7ed0 | 2411 | |
26e41594 | 2412 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2413 | |
26e41594 AM |
2414 | /* The offset must always be a multiple of 4. We use |
2415 | the least significant bit to record whether we have | |
2416 | already generated the necessary reloc. */ | |
2417 | if ((off & 1) != 0) | |
2418 | off &= ~1; | |
2419 | else | |
2420 | { | |
2421 | bfd_put_32 (output_bfd, relocation, | |
0451c93c | 2422 | htab->sgot->contents + off); |
a85d7ed0 | 2423 | |
26e41594 AM |
2424 | if (info->shared) |
2425 | { | |
2426 | asection *srelgot; | |
2427 | Elf_Internal_Rela outrel; | |
947216bf | 2428 | bfd_byte *loc; |
a85d7ed0 | 2429 | |
26e41594 | 2430 | srelgot = htab->srelgot; |
0451c93c MS |
2431 | if (srelgot == NULL) |
2432 | abort (); | |
a85d7ed0 | 2433 | |
26e41594 AM |
2434 | outrel.r_offset = (htab->sgot->output_section->vma |
2435 | + htab->sgot->output_offset | |
2436 | + off); | |
2437 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2438 | outrel.r_addend = relocation; |
947216bf AM |
2439 | loc = srelgot->contents; |
2440 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
26e41594 AM |
2441 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
2442 | } | |
a85d7ed0 | 2443 | |
26e41594 AM |
2444 | local_got_offsets[r_symndx] |= 1; |
2445 | } | |
2446 | } | |
a85d7ed0 | 2447 | |
0451c93c MS |
2448 | if (off >= (bfd_vma) -2) |
2449 | abort (); | |
a85d7ed0 | 2450 | |
0451c93c | 2451 | relocation = htab->sgot->output_offset + off; |
befc3abb | 2452 | |
ae9a127f NC |
2453 | /* For @GOTENT the relocation is against the offset between |
2454 | the instruction and the symbols entry in the GOT and not | |
2455 | between the start of the GOT and the symbols entry. We | |
2456 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2457 | if ( r_type == R_390_GOTENT |
2458 | || r_type == R_390_GOTPLTENT) | |
befc3abb MS |
2459 | relocation += htab->sgot->output_section->vma; |
2460 | ||
26e41594 | 2461 | break; |
dc810e39 | 2462 | |
5236c819 | 2463 | case R_390_GOTOFF16: |
26e41594 AM |
2464 | case R_390_GOTOFF32: |
2465 | /* Relocation is relative to the start of the global offset | |
2466 | table. */ | |
2467 | ||
2468 | /* Note that sgot->output_offset is not involved in this | |
2469 | calculation. We always want the start of .got. If we | |
2470 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2471 | permitted by the ABI, we might have to change this | |
2472 | calculation. */ | |
2473 | relocation -= htab->sgot->output_section->vma; | |
2474 | break; | |
2475 | ||
2476 | case R_390_GOTPC: | |
befc3abb | 2477 | case R_390_GOTPCDBL: |
26e41594 AM |
2478 | /* Use global offset table as symbol value. */ |
2479 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2480 | unresolved_reloc = FALSE; |
26e41594 | 2481 | break; |
a85d7ed0 | 2482 | |
26e41594 AM |
2483 | case R_390_PLT16DBL: |
2484 | case R_390_PLT32DBL: | |
2485 | case R_390_PLT32: | |
2486 | /* Relocation is to the entry for this symbol in the | |
2487 | procedure linkage table. */ | |
a85d7ed0 | 2488 | |
26e41594 AM |
2489 | /* Resolve a PLT32 reloc against a local symbol directly, |
2490 | without using the procedure linkage table. */ | |
2491 | if (h == NULL) | |
2492 | break; | |
a85d7ed0 | 2493 | |
26e41594 | 2494 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2495 | || htab->splt == NULL) |
26e41594 AM |
2496 | { |
2497 | /* We didn't make a PLT entry for this symbol. This | |
2498 | happens when statically linking PIC code, or when | |
2499 | using -Bsymbolic. */ | |
2500 | break; | |
2501 | } | |
2502 | ||
2503 | relocation = (htab->splt->output_section->vma | |
2504 | + htab->splt->output_offset | |
2505 | + h->plt.offset); | |
b34976b6 | 2506 | unresolved_reloc = FALSE; |
26e41594 | 2507 | break; |
a85d7ed0 | 2508 | |
5236c819 MS |
2509 | case R_390_PLTOFF16: |
2510 | case R_390_PLTOFF32: | |
26e41594 AM |
2511 | /* Relocation is to the entry for this symbol in the |
2512 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2513 | |
2514 | /* For local symbols or if we didn't make a PLT entry for | |
2515 | this symbol resolve the symbol directly. */ | |
26e41594 | 2516 | if ( h == NULL |
5236c819 MS |
2517 | || h->plt.offset == (bfd_vma) -1 |
2518 | || htab->splt == NULL) | |
2519 | { | |
2520 | relocation -= htab->sgot->output_section->vma; | |
2521 | break; | |
2522 | } | |
2523 | ||
26e41594 AM |
2524 | relocation = (htab->splt->output_section->vma |
2525 | + htab->splt->output_offset | |
2526 | + h->plt.offset | |
5236c819 MS |
2527 | - htab->sgot->output_section->vma); |
2528 | unresolved_reloc = FALSE; | |
26e41594 AM |
2529 | break; |
2530 | ||
2531 | case R_390_8: | |
2532 | case R_390_16: | |
2533 | case R_390_32: | |
2534 | case R_390_PC16: | |
2535 | case R_390_PC16DBL: | |
2536 | case R_390_PC32DBL: | |
2537 | case R_390_PC32: | |
ec338859 AM |
2538 | /* r_symndx will be zero only for relocs against symbols |
2539 | from removed linkonce sections, or sections discarded by | |
2540 | a linker script. */ | |
26e41594 AM |
2541 | if (r_symndx == 0 |
2542 | || (input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
2543 | break; |
2544 | ||
26e41594 | 2545 | if ((info->shared |
82058a73 MS |
2546 | && (h == NULL |
2547 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2548 | || h->root.type != bfd_link_hash_undefweak) | |
0451c93c MS |
2549 | && ((r_type != R_390_PC16 |
2550 | && r_type != R_390_PC16DBL | |
befc3abb | 2551 | && r_type != R_390_PC32DBL |
0451c93c MS |
2552 | && r_type != R_390_PC32) |
2553 | || (h != NULL | |
1c3ff0f2 | 2554 | && !SYMBOL_REFERENCES_LOCAL (info, h)))) |
64285810 MS |
2555 | || (ELIMINATE_COPY_RELOCS |
2556 | && !info->shared | |
0451c93c MS |
2557 | && h != NULL |
2558 | && h->dynindx != -1 | |
2559 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
2560 | && (((h->elf_link_hash_flags | |
2561 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2562 | && (h->elf_link_hash_flags | |
2563 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2564 | || h->root.type == bfd_link_hash_undefweak | |
2565 | || h->root.type == bfd_link_hash_undefined))) | |
26e41594 AM |
2566 | { |
2567 | Elf_Internal_Rela outrel; | |
2568 | bfd_boolean skip, relocate; | |
0451c93c | 2569 | asection *sreloc; |
947216bf | 2570 | bfd_byte *loc; |
ec338859 | 2571 | |
0451c93c MS |
2572 | /* When generating a shared object, these relocations |
2573 | are copied into the output file to be resolved at run | |
2574 | time. */ | |
ec338859 | 2575 | |
26e41594 AM |
2576 | skip = FALSE; |
2577 | relocate = FALSE; | |
ec338859 | 2578 | |
c629eae0 JJ |
2579 | outrel.r_offset = |
2580 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2581 | rel->r_offset); | |
2582 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2583 | skip = TRUE; |
0bb2d96a | 2584 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2585 | skip = TRUE, relocate = TRUE; |
26e41594 AM |
2586 | outrel.r_offset += (input_section->output_section->vma |
2587 | + input_section->output_offset); | |
ec338859 | 2588 | |
26e41594 | 2589 | if (skip) |
0bb2d96a | 2590 | memset (&outrel, 0, sizeof outrel); |
26e41594 | 2591 | else if (h != NULL |
0451c93c MS |
2592 | && h->dynindx != -1 |
2593 | && (r_type == R_390_PC16 | |
2594 | || r_type == R_390_PC16DBL | |
befc3abb | 2595 | || r_type == R_390_PC32DBL |
0451c93c MS |
2596 | || r_type == R_390_PC32 |
2597 | || !info->shared | |
2598 | || !info->symbolic | |
2599 | || (h->elf_link_hash_flags | |
2600 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
26e41594 AM |
2601 | { |
2602 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
27018c3f | 2603 | outrel.r_addend = rel->r_addend; |
26e41594 AM |
2604 | } |
2605 | else | |
2606 | { | |
0451c93c | 2607 | /* This symbol is local, or marked to become local. */ |
90ced0dd | 2608 | outrel.r_addend = relocation + rel->r_addend; |
b5727d75 MS |
2609 | if (r_type == R_390_32) |
2610 | { | |
2611 | relocate = TRUE; | |
2612 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
b5727d75 MS |
2613 | } |
2614 | else | |
2615 | { | |
2616 | long sindx; | |
2617 | ||
90ced0dd | 2618 | if (bfd_is_abs_section (sec)) |
b5727d75 MS |
2619 | sindx = 0; |
2620 | else if (sec == NULL || sec->owner == NULL) | |
2621 | { | |
2622 | bfd_set_error(bfd_error_bad_value); | |
2623 | return FALSE; | |
2624 | } | |
2625 | else | |
2626 | { | |
2627 | asection *osec; | |
2628 | ||
2629 | osec = sec->output_section; | |
2630 | sindx = elf_section_data (osec)->dynindx; | |
2631 | BFD_ASSERT (sindx > 0); | |
90ced0dd MS |
2632 | |
2633 | /* We are turning this relocation into one | |
2634 | against a section symbol, so subtract out | |
2635 | the output section's address but not the | |
2636 | offset of the input section in the output | |
2637 | section. */ | |
2638 | ||
2639 | outrel.r_addend -= osec->vma; | |
b5727d75 MS |
2640 | } |
2641 | outrel.r_info = ELF32_R_INFO (sindx, r_type); | |
b5727d75 | 2642 | } |
26e41594 | 2643 | } |
ec338859 | 2644 | |
0451c93c MS |
2645 | sreloc = elf_section_data (input_section)->sreloc; |
2646 | if (sreloc == NULL) | |
2647 | abort (); | |
ec338859 | 2648 | |
947216bf AM |
2649 | loc = sreloc->contents; |
2650 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 2651 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
ec338859 | 2652 | |
26e41594 AM |
2653 | /* If this reloc is against an external symbol, we do |
2654 | not want to fiddle with the addend. Otherwise, we | |
2655 | need to include the symbol value so that it becomes | |
2656 | an addend for the dynamic reloc. */ | |
2657 | if (! relocate) | |
2658 | continue; | |
2659 | } | |
0451c93c | 2660 | break; |
ec338859 | 2661 | |
69fc87f1 MS |
2662 | /* Relocations for tls literal pool entries. */ |
2663 | case R_390_TLS_IE32: | |
2664 | if (info->shared) | |
2665 | { | |
2666 | Elf_Internal_Rela outrel; | |
2667 | asection *sreloc; | |
2668 | bfd_byte *loc; | |
2669 | ||
2670 | outrel.r_offset = rel->r_offset | |
2671 | + input_section->output_section->vma | |
2672 | + input_section->output_offset; | |
2673 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
2674 | sreloc = elf_section_data (input_section)->sreloc; | |
2675 | if (sreloc == NULL) | |
2676 | abort (); | |
2677 | loc = sreloc->contents; | |
2678 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2679 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
2680 | } | |
ae9a127f | 2681 | /* Fall through. */ |
69fc87f1 MS |
2682 | |
2683 | case R_390_TLS_GD32: | |
2684 | case R_390_TLS_GOTIE32: | |
2685 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2686 | tls_type = GOT_UNKNOWN; | |
2687 | if (h == NULL && local_got_offsets) | |
2688 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2689 | else if (h != NULL) | |
2690 | { | |
2691 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2692 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2693 | r_type = R_390_TLS_LE32; | |
2694 | } | |
2695 | if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) | |
2696 | r_type = R_390_TLS_IE32; | |
2697 | ||
2698 | if (r_type == R_390_TLS_LE32) | |
2699 | { | |
2700 | /* This relocation gets optimized away by the local exec | |
2701 | access optimization. */ | |
2702 | BFD_ASSERT (! unresolved_reloc); | |
2703 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2704 | contents + rel->r_offset); | |
2705 | continue; | |
2706 | } | |
2707 | ||
2708 | if (htab->sgot == NULL) | |
2709 | abort (); | |
2710 | ||
2711 | if (h != NULL) | |
2712 | off = h->got.offset; | |
2713 | else | |
2714 | { | |
2715 | if (local_got_offsets == NULL) | |
2716 | abort (); | |
2717 | ||
2718 | off = local_got_offsets[r_symndx]; | |
2719 | } | |
2720 | ||
2721 | emit_tls_relocs: | |
2722 | ||
2723 | if ((off & 1) != 0) | |
2724 | off &= ~1; | |
26e41594 | 2725 | else |
69fc87f1 MS |
2726 | { |
2727 | Elf_Internal_Rela outrel; | |
2728 | bfd_byte *loc; | |
2729 | int dr_type, indx; | |
2730 | ||
2731 | if (htab->srelgot == NULL) | |
2732 | abort (); | |
2733 | ||
2734 | outrel.r_offset = (htab->sgot->output_section->vma | |
2735 | + htab->sgot->output_offset + off); | |
2736 | ||
2737 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2738 | if (r_type == R_390_TLS_GD32) | |
2739 | dr_type = R_390_TLS_DTPMOD; | |
2740 | else | |
2741 | dr_type = R_390_TLS_TPOFF; | |
2742 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2743 | outrel.r_addend = relocation - dtpoff_base (info); | |
2744 | else | |
2745 | outrel.r_addend = 0; | |
2746 | outrel.r_info = ELF32_R_INFO (indx, dr_type); | |
2747 | loc = htab->srelgot->contents; | |
2748 | loc += htab->srelgot->reloc_count++ | |
2749 | * sizeof (Elf32_External_Rela); | |
2750 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2751 | ||
2752 | if (r_type == R_390_TLS_GD32) | |
2753 | { | |
2754 | if (indx == 0) | |
2755 | { | |
26e41594 | 2756 | BFD_ASSERT (! unresolved_reloc); |
69fc87f1 MS |
2757 | bfd_put_32 (output_bfd, |
2758 | relocation - dtpoff_base (info), | |
2759 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2760 | } | |
2761 | else | |
2762 | { | |
2763 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); | |
2764 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2765 | outrel.r_addend = 0; | |
2766 | htab->srelgot->reloc_count++; | |
2767 | loc += sizeof (Elf32_External_Rela); | |
2768 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2769 | } | |
2770 | } | |
2771 | ||
2772 | if (h != NULL) | |
2773 | h->got.offset |= 1; | |
2774 | else | |
2775 | local_got_offsets[r_symndx] |= 1; | |
2776 | } | |
2777 | ||
2778 | if (off >= (bfd_vma) -2) | |
2779 | abort (); | |
2780 | if (r_type == ELF32_R_TYPE (rel->r_info)) | |
2781 | { | |
2782 | relocation = htab->sgot->output_offset + off; | |
2783 | if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) | |
2784 | relocation += htab->sgot->output_section->vma; | |
2785 | unresolved_reloc = FALSE; | |
2786 | } | |
2787 | else | |
2788 | { | |
2789 | bfd_put_32 (output_bfd, htab->sgot->output_offset + off, | |
2790 | contents + rel->r_offset); | |
2791 | continue; | |
2792 | } | |
2793 | break; | |
2794 | ||
2795 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 2796 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
2797 | case R_390_TLS_IEENT: |
2798 | if (h == NULL) | |
2799 | { | |
2800 | if (local_got_offsets == NULL) | |
2801 | abort(); | |
2802 | off = local_got_offsets[r_symndx]; | |
2803 | if (info->shared) | |
2804 | goto emit_tls_relocs; | |
2805 | } | |
2806 | else | |
2807 | { | |
2808 | off = h->got.offset; | |
2809 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2810 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2811 | goto emit_tls_relocs; | |
2812 | } | |
2813 | ||
2814 | if (htab->sgot == NULL) | |
2815 | abort (); | |
2816 | ||
2817 | BFD_ASSERT (! unresolved_reloc); | |
2818 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2819 | htab->sgot->contents + off); | |
2820 | relocation = htab->sgot->output_offset + off; | |
2821 | if (r_type == R_390_TLS_IEENT) | |
2822 | relocation += htab->sgot->output_section->vma; | |
2823 | unresolved_reloc = FALSE; | |
2824 | break; | |
2825 | ||
2826 | case R_390_TLS_LDM32: | |
2827 | if (! info->shared) | |
2828 | /* The literal pool entry this relocation refers to gets ignored | |
2829 | by the optimized code of the local exec model. Do nothing | |
2830 | and the value will turn out zero. */ | |
2831 | continue; | |
2832 | ||
2833 | if (htab->sgot == NULL) | |
2834 | abort (); | |
2835 | ||
2836 | off = htab->tls_ldm_got.offset; | |
2837 | if (off & 1) | |
2838 | off &= ~1; | |
2839 | else | |
2840 | { | |
2841 | Elf_Internal_Rela outrel; | |
2842 | bfd_byte *loc; | |
2843 | ||
2844 | if (htab->srelgot == NULL) | |
2845 | abort (); | |
2846 | ||
2847 | outrel.r_offset = (htab->sgot->output_section->vma | |
2848 | + htab->sgot->output_offset + off); | |
2849 | ||
2850 | bfd_put_32 (output_bfd, 0, | |
2851 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2852 | outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); | |
2853 | outrel.r_addend = 0; | |
2854 | loc = htab->srelgot->contents; | |
2855 | loc += htab->srelgot->reloc_count++ | |
2856 | * sizeof (Elf32_External_Rela); | |
2857 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2858 | htab->tls_ldm_got.offset |= 1; | |
2859 | } | |
2860 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2861 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2862 | break; |
2863 | ||
2864 | case R_390_TLS_LE32: | |
2865 | if (info->shared) | |
2866 | { | |
2867 | /* Linking a shared library with non-fpic code requires | |
2868 | a R_390_TLS_TPOFF relocation. */ | |
2869 | Elf_Internal_Rela outrel; | |
2870 | asection *sreloc; | |
2871 | bfd_byte *loc; | |
2872 | int indx; | |
2873 | ||
2874 | outrel.r_offset = rel->r_offset | |
2875 | + input_section->output_section->vma | |
2876 | + input_section->output_offset; | |
2877 | if (h != NULL && h->dynindx != -1) | |
2878 | indx = h->dynindx; | |
2879 | else | |
2880 | indx = 0; | |
2881 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); | |
2882 | if (indx == 0) | |
2883 | outrel.r_addend = relocation - dtpoff_base (info); | |
2884 | else | |
2885 | outrel.r_addend = 0; | |
2886 | sreloc = elf_section_data (input_section)->sreloc; | |
2887 | if (sreloc == NULL) | |
2888 | abort (); | |
2889 | loc = sreloc->contents; | |
2890 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2891 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2892 | } | |
2893 | else | |
2894 | { | |
2895 | BFD_ASSERT (! unresolved_reloc); | |
2896 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2897 | contents + rel->r_offset); | |
2898 | } | |
2899 | continue; | |
2900 | ||
2901 | case R_390_TLS_LDO32: | |
2902 | if (info->shared || (input_section->flags & SEC_CODE) == 0) | |
2903 | relocation -= dtpoff_base (info); | |
2904 | else | |
2905 | /* When converting LDO to LE, we must negate. */ | |
2906 | relocation = -tpoff (info, relocation); | |
2907 | break; | |
2908 | ||
2909 | /* Relocations for tls instructions. */ | |
2910 | case R_390_TLS_LOAD: | |
2911 | case R_390_TLS_GDCALL: | |
2912 | case R_390_TLS_LDCALL: | |
2913 | tls_type = GOT_UNKNOWN; | |
2914 | if (h == NULL && local_got_offsets) | |
2915 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2916 | else if (h != NULL) | |
2917 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2918 | ||
2919 | if (tls_type == GOT_TLS_GD) | |
2920 | continue; | |
2921 | ||
2922 | if (r_type == R_390_TLS_LOAD) | |
2923 | { | |
2924 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2925 | { | |
2926 | /* IE->LE transition. Four valid cases: | |
2927 | l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 | |
2928 | l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 | |
2929 | l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 | |
2930 | l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2931 | unsigned int insn, ry; | |
2932 | ||
2933 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2934 | ry = 0; | |
2935 | if ((insn & 0xff00f000) == 0x58000000) | |
2936 | /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ | |
2937 | ry = (insn & 0x000f0000); | |
2938 | else if ((insn & 0xff0f0000) == 0x58000000) | |
2939 | /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2940 | ry = (insn & 0x0000f000) << 4; | |
2941 | else if ((insn & 0xff00f000) == 0x5800c000) | |
2942 | /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ | |
2943 | ry = (insn & 0x000f0000); | |
2944 | else if ((insn & 0xff0f0000) == 0x580c0000) | |
2945 | /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2946 | ry = (insn & 0x0000f000) << 4; | |
2947 | else | |
2948 | invalid_tls_insn (input_bfd, input_section, rel); | |
2949 | insn = 0x18000700 | (insn & 0x00f00000) | ry; | |
2950 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2951 | } | |
2952 | } | |
2953 | else if (r_type == R_390_TLS_GDCALL) | |
2954 | { | |
2955 | unsigned int insn; | |
2956 | ||
2957 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2958 | if ((insn & 0xff000fff) != 0x4d000000) | |
2959 | invalid_tls_insn (input_bfd, input_section, rel); | |
2960 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2961 | /* GD->LE transition. | |
2962 | bas %r14,0(%rx,%r13) -> bc 0,0 */ | |
2963 | insn = 0x47000000; | |
2964 | else | |
2965 | /* GD->IE transition. | |
2966 | bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ | |
2967 | insn = 0x5822c000; | |
2968 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2969 | } | |
2970 | else if (r_type == R_390_TLS_LDCALL) | |
2971 | { | |
2972 | if (!info->shared) | |
2973 | { | |
2974 | unsigned int insn; | |
2975 | ||
2976 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2977 | if ((insn & 0xff000fff) != 0x4d000000) | |
2978 | invalid_tls_insn (input_bfd, input_section, rel); | |
2979 | /* LD->LE transition. | |
2980 | bas %r14,0(%rx,%r13) -> bc 0,0 */ | |
2981 | insn = 0x47000000; | |
2982 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2983 | } | |
2984 | } | |
2985 | continue; | |
2986 | ||
0451c93c MS |
2987 | default: |
2988 | break; | |
2989 | } | |
ec338859 | 2990 | |
239e1f3a AM |
2991 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2992 | because such sections are not SEC_ALLOC and thus ld.so will | |
2993 | not process them. */ | |
0451c93c | 2994 | if (unresolved_reloc |
239e1f3a | 2995 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
0451c93c MS |
2996 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
2997 | (*_bfd_error_handler) | |
2998 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
2999 | bfd_archive_filename (input_bfd), | |
3000 | bfd_get_section_name (input_bfd, input_section), | |
3001 | (long) rel->r_offset, | |
3002 | h->root.root.string); | |
ec338859 | 3003 | |
bd1ea41b MS |
3004 | if (r_type == R_390_20 |
3005 | || r_type == R_390_GOT20 | |
3006 | || r_type == R_390_GOTPLT20 | |
3007 | || r_type == R_390_TLS_GOTIE20) | |
3008 | { | |
3009 | relocation += rel->r_addend; | |
3010 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; | |
3011 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3012 | contents, rel->r_offset, | |
3013 | relocation, 0); | |
3014 | } | |
3015 | else | |
3016 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3017 | contents, rel->r_offset, | |
3018 | relocation, rel->r_addend); | |
ec338859 | 3019 | |
a85d7ed0 NC |
3020 | if (r != bfd_reloc_ok) |
3021 | { | |
0451c93c | 3022 | const char *name; |
ec338859 | 3023 | |
0451c93c MS |
3024 | if (h != NULL) |
3025 | name = h->root.root.string; | |
3026 | else | |
a85d7ed0 | 3027 | { |
0451c93c MS |
3028 | name = bfd_elf_string_from_elf_section (input_bfd, |
3029 | symtab_hdr->sh_link, | |
3030 | sym->st_name); | |
3031 | if (name == NULL) | |
b34976b6 | 3032 | return FALSE; |
0451c93c MS |
3033 | if (*name == '\0') |
3034 | name = bfd_section_name (input_bfd, sec); | |
3035 | } | |
ec338859 | 3036 | |
0451c93c MS |
3037 | if (r == bfd_reloc_overflow) |
3038 | { | |
ec338859 | 3039 | |
0451c93c MS |
3040 | if (! ((*info->callbacks->reloc_overflow) |
3041 | (info, name, howto->name, (bfd_vma) 0, | |
3042 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 3043 | return FALSE; |
0451c93c MS |
3044 | } |
3045 | else | |
3046 | { | |
3047 | (*_bfd_error_handler) | |
3048 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
3049 | bfd_archive_filename (input_bfd), | |
3050 | bfd_get_section_name (input_bfd, input_section), | |
3051 | (long) rel->r_offset, name, (int) r); | |
b34976b6 | 3052 | return FALSE; |
a85d7ed0 NC |
3053 | } |
3054 | } | |
3055 | } | |
ec338859 | 3056 | |
b34976b6 | 3057 | return TRUE; |
a85d7ed0 NC |
3058 | } |
3059 | ||
3060 | /* Finish up dynamic symbol handling. We set the contents of various | |
3061 | dynamic sections here. */ | |
3062 | ||
b34976b6 | 3063 | static bfd_boolean |
a85d7ed0 NC |
3064 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
3065 | bfd *output_bfd; | |
3066 | struct bfd_link_info *info; | |
3067 | struct elf_link_hash_entry *h; | |
3068 | Elf_Internal_Sym *sym; | |
3069 | { | |
0451c93c | 3070 | struct elf_s390_link_hash_table *htab; |
ec338859 | 3071 | |
0451c93c | 3072 | htab = elf_s390_hash_table (info); |
ec338859 | 3073 | |
a85d7ed0 NC |
3074 | if (h->plt.offset != (bfd_vma) -1) |
3075 | { | |
0451c93c MS |
3076 | bfd_vma plt_index; |
3077 | bfd_vma got_offset; | |
a85d7ed0 | 3078 | Elf_Internal_Rela rela; |
947216bf | 3079 | bfd_byte *loc; |
a85d7ed0 | 3080 | bfd_vma relative_offset; |
ec338859 | 3081 | |
a85d7ed0 | 3082 | /* This symbol has an entry in the procedure linkage table. Set |
26e41594 | 3083 | it up. */ |
0451c93c MS |
3084 | if (h->dynindx == -1 |
3085 | || htab->splt == NULL | |
3086 | || htab->sgotplt == NULL | |
3087 | || htab->srelplt == NULL) | |
3088 | abort (); | |
a85d7ed0 | 3089 | |
dc810e39 | 3090 | /* Calc. index no. |
26e41594 | 3091 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
3092 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
3093 | ||
3094 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, | |
26e41594 | 3095 | addr & GOT addr. */ |
a85d7ed0 NC |
3096 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3097 | ||
3098 | /* S390 uses halfwords for relative branch calc! */ | |
dc810e39 | 3099 | relative_offset = - ((PLT_FIRST_ENTRY_SIZE + |
26e41594 | 3100 | (PLT_ENTRY_SIZE * plt_index) + 18) / 2); |
a85d7ed0 | 3101 | /* If offset is > 32768, branch to a previous branch |
26e41594 | 3102 | 390 can only handle +-64 K jumps. */ |
dc810e39 | 3103 | if ( -32768 > (int) relative_offset ) |
26e41594 AM |
3104 | relative_offset |
3105 | = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); | |
a85d7ed0 NC |
3106 | |
3107 | /* Fill in the entry in the procedure linkage table. */ | |
3108 | if (!info->shared) | |
0451c93c | 3109 | { |
26e41594 | 3110 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
0451c93c MS |
3111 | htab->splt->contents + h->plt.offset); |
3112 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
3113 | htab->splt->contents + h->plt.offset + 4); | |
3114 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
3115 | htab->splt->contents + h->plt.offset + 8); | |
3116 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
3117 | htab->splt->contents + h->plt.offset + 12); | |
3118 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
3119 | htab->splt->contents + h->plt.offset + 16); | |
3120 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3121 | htab->splt->contents + h->plt.offset + 20); | |
3122 | bfd_put_32 (output_bfd, | |
3123 | (htab->sgotplt->output_section->vma | |
3124 | + htab->sgotplt->output_offset | |
3125 | + got_offset), | |
3126 | htab->splt->contents + h->plt.offset + 24); | |
3127 | } | |
a85d7ed0 | 3128 | else if (got_offset < 4096) |
0451c93c MS |
3129 | { |
3130 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset, | |
3131 | htab->splt->contents + h->plt.offset); | |
3132 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1, | |
3133 | htab->splt->contents + h->plt.offset + 4); | |
3134 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2, | |
3135 | htab->splt->contents + h->plt.offset + 8); | |
3136 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3, | |
3137 | htab->splt->contents + h->plt.offset + 12); | |
3138 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4, | |
3139 | htab->splt->contents + h->plt.offset + 16); | |
3140 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3141 | htab->splt->contents + h->plt.offset + 20); | |
3142 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3143 | htab->splt->contents + h->plt.offset + 24); | |
3144 | } | |
a85d7ed0 | 3145 | else if (got_offset < 32768) |
0451c93c MS |
3146 | { |
3147 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset, | |
3148 | htab->splt->contents + h->plt.offset); | |
3149 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1, | |
3150 | htab->splt->contents + h->plt.offset + 4); | |
3151 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2, | |
3152 | htab->splt->contents + h->plt.offset + 8); | |
3153 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3, | |
3154 | htab->splt->contents + h->plt.offset + 12); | |
3155 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4, | |
3156 | htab->splt->contents + h->plt.offset + 16); | |
3157 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3158 | htab->splt->contents + h->plt.offset + 20); | |
3159 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3160 | htab->splt->contents + h->plt.offset + 24); | |
3161 | } | |
a85d7ed0 | 3162 | else |
0451c93c MS |
3163 | { |
3164 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0, | |
3165 | htab->splt->contents + h->plt.offset); | |
3166 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1, | |
3167 | htab->splt->contents + h->plt.offset + 4); | |
3168 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, | |
3169 | htab->splt->contents + h->plt.offset + 8); | |
3170 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, | |
3171 | htab->splt->contents + h->plt.offset + 12); | |
3172 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, | |
3173 | htab->splt->contents + h->plt.offset + 16); | |
3174 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3175 | htab->splt->contents + h->plt.offset + 20); | |
3176 | bfd_put_32 (output_bfd, got_offset, | |
3177 | htab->splt->contents + h->plt.offset + 24); | |
3178 | } | |
a85d7ed0 NC |
3179 | /* Insert offset into reloc. table here. */ |
3180 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
26e41594 | 3181 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3182 | |
3183 | /* Fill in the entry in the global offset table. | |
26e41594 | 3184 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3185 | bfd_put_32 (output_bfd, |
0451c93c MS |
3186 | (htab->splt->output_section->vma |
3187 | + htab->splt->output_offset | |
a85d7ed0 NC |
3188 | + h->plt.offset |
3189 | + 12), | |
0451c93c | 3190 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3191 | |
0451c93c MS |
3192 | /* Fill in the entry in the .rela.plt section. */ |
3193 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3194 | + htab->sgotplt->output_offset | |
3195 | + got_offset); | |
3196 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3197 | rela.r_addend = 0; | |
947216bf | 3198 | loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela); |
0451c93c | 3199 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
ec338859 | 3200 | |
a85d7ed0 NC |
3201 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
3202 | { | |
3203 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3204 | the .plt section. Leave the value alone. This is a clue |
3205 | for the dynamic linker, to make function pointer | |
3206 | comparisons work between an application and shared | |
ec338859 | 3207 | library. */ |
a85d7ed0 NC |
3208 | sym->st_shndx = SHN_UNDEF; |
3209 | } | |
3210 | } | |
ec338859 | 3211 | |
69fc87f1 MS |
3212 | if (h->got.offset != (bfd_vma) -1 |
3213 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3214 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3215 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3216 | { |
a85d7ed0 | 3217 | Elf_Internal_Rela rela; |
947216bf | 3218 | bfd_byte *loc; |
a85d7ed0 NC |
3219 | |
3220 | /* This symbol has an entry in the global offset table. Set it | |
26e41594 | 3221 | up. */ |
a85d7ed0 | 3222 | |
0451c93c MS |
3223 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3224 | abort (); | |
a85d7ed0 | 3225 | |
0451c93c MS |
3226 | rela.r_offset = (htab->sgot->output_section->vma |
3227 | + htab->sgot->output_offset | |
dc810e39 | 3228 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3229 | |
3230 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3231 | symbol is defined locally or was forced to be local because | |
3232 | of a version file, we just want to emit a RELATIVE reloc. | |
3233 | The entry in the global offset table will already have been | |
3234 | initialized in the relocate_section function. */ | |
0451c93c MS |
3235 | if (info->shared |
3236 | && (info->symbolic | |
3237 | || h->dynindx == -1 | |
3238 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) | |
3239 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
3240 | { | |
3241 | BFD_ASSERT((h->got.offset & 1) != 0); | |
3242 | rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
3243 | rela.r_addend = (h->root.u.def.value | |
26e41594 AM |
3244 | + h->root.u.def.section->output_section->vma |
3245 | + h->root.u.def.section->output_offset); | |
3246 | } | |
a85d7ed0 NC |
3247 | else |
3248 | { | |
3249 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3250 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3251 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); |
26e41594 AM |
3252 | rela.r_addend = 0; |
3253 | } | |
a85d7ed0 | 3254 | |
947216bf AM |
3255 | loc = htab->srelgot->contents; |
3256 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 3257 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3258 | } |
3259 | ||
3260 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3261 | { | |
a85d7ed0 | 3262 | Elf_Internal_Rela rela; |
947216bf | 3263 | bfd_byte *loc; |
a85d7ed0 NC |
3264 | |
3265 | /* This symbols needs a copy reloc. Set it up. */ | |
3266 | ||
0451c93c MS |
3267 | if (h->dynindx == -1 |
3268 | || (h->root.type != bfd_link_hash_defined | |
3269 | && h->root.type != bfd_link_hash_defweak) | |
3270 | || htab->srelbss == NULL) | |
3271 | abort (); | |
a85d7ed0 NC |
3272 | |
3273 | rela.r_offset = (h->root.u.def.value | |
3274 | + h->root.u.def.section->output_section->vma | |
3275 | + h->root.u.def.section->output_offset); | |
3276 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); | |
3277 | rela.r_addend = 0; | |
947216bf AM |
3278 | loc = htab->srelbss->contents; |
3279 | loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 3280 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3281 | } |
3282 | ||
3283 | /* Mark some specially defined symbols as absolute. */ | |
3284 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3285 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3286 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3287 | sym->st_shndx = SHN_ABS; | |
3288 | ||
b34976b6 | 3289 | return TRUE; |
a85d7ed0 NC |
3290 | } |
3291 | ||
0451c93c MS |
3292 | /* Used to decide how to sort relocs in an optimal manner for the |
3293 | dynamic linker, before writing them out. */ | |
3294 | ||
3295 | static enum elf_reloc_type_class | |
3296 | elf_s390_reloc_type_class (rela) | |
3297 | const Elf_Internal_Rela *rela; | |
3298 | { | |
3299 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3300 | { | |
3301 | case R_390_RELATIVE: | |
3302 | return reloc_class_relative; | |
3303 | case R_390_JMP_SLOT: | |
3304 | return reloc_class_plt; | |
3305 | case R_390_COPY: | |
3306 | return reloc_class_copy; | |
3307 | default: | |
3308 | return reloc_class_normal; | |
3309 | } | |
3310 | } | |
3311 | ||
a85d7ed0 NC |
3312 | /* Finish up the dynamic sections. */ |
3313 | ||
b34976b6 | 3314 | static bfd_boolean |
a85d7ed0 NC |
3315 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3316 | bfd *output_bfd; | |
3317 | struct bfd_link_info *info; | |
3318 | { | |
0451c93c | 3319 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3320 | bfd *dynobj; |
3321 | asection *sdyn; | |
a85d7ed0 | 3322 | |
0451c93c MS |
3323 | htab = elf_s390_hash_table (info); |
3324 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3325 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3326 | ||
0451c93c | 3327 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3328 | { |
a85d7ed0 NC |
3329 | Elf32_External_Dyn *dyncon, *dynconend; |
3330 | ||
0451c93c MS |
3331 | if (sdyn == NULL || htab->sgot == NULL) |
3332 | abort (); | |
a85d7ed0 NC |
3333 | |
3334 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 3335 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
a85d7ed0 NC |
3336 | for (; dyncon < dynconend; dyncon++) |
3337 | { | |
3338 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3339 | asection *s; |
ec338859 | 3340 | |
a85d7ed0 | 3341 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3342 | |
a85d7ed0 NC |
3343 | switch (dyn.d_tag) |
3344 | { | |
3345 | default: | |
0451c93c | 3346 | continue; |
ec338859 | 3347 | |
a85d7ed0 | 3348 | case DT_PLTGOT: |
0451c93c MS |
3349 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3350 | break; | |
ec338859 | 3351 | |
a85d7ed0 | 3352 | case DT_JMPREL: |
0451c93c | 3353 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 NC |
3354 | break; |
3355 | ||
3356 | case DT_PLTRELSZ: | |
0451c93c | 3357 | s = htab->srelplt->output_section; |
eea6121a | 3358 | dyn.d_un.d_val = s->size; |
a85d7ed0 NC |
3359 | break; |
3360 | } | |
0451c93c MS |
3361 | |
3362 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3363 | } |
3364 | ||
3365 | /* Fill in the special first entry in the procedure linkage table. */ | |
eea6121a | 3366 | if (htab->splt && htab->splt->size > 0) |
a85d7ed0 | 3367 | { |
26e41594 AM |
3368 | memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE); |
3369 | if (info->shared) | |
0451c93c | 3370 | { |
dc810e39 | 3371 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0, |
26e41594 | 3372 | htab->splt->contents ); |
dc810e39 | 3373 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1, |
26e41594 | 3374 | htab->splt->contents +4 ); |
dc810e39 | 3375 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2, |
26e41594 | 3376 | htab->splt->contents +8 ); |
dc810e39 | 3377 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3, |
26e41594 | 3378 | htab->splt->contents +12 ); |
dc810e39 | 3379 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4, |
26e41594 AM |
3380 | htab->splt->contents +16 ); |
3381 | } | |
3382 | else | |
3383 | { | |
3384 | bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0, | |
3385 | htab->splt->contents ); | |
3386 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3387 | htab->splt->contents +4 ); | |
3388 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2, | |
3389 | htab->splt->contents +8 ); | |
3390 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3391 | htab->splt->contents +12 ); | |
3392 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3393 | htab->splt->contents +16 ); | |
3394 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3395 | htab->splt->contents +20 ); | |
3396 | bfd_put_32 (output_bfd, | |
3397 | htab->sgotplt->output_section->vma | |
0451c93c | 3398 | + htab->sgotplt->output_offset, |
26e41594 AM |
3399 | htab->splt->contents + 24); |
3400 | } | |
0451c93c MS |
3401 | elf_section_data (htab->splt->output_section) |
3402 | ->this_hdr.sh_entsize = 4; | |
a85d7ed0 NC |
3403 | } |
3404 | ||
3405 | } | |
3406 | ||
0451c93c | 3407 | if (htab->sgotplt) |
a85d7ed0 | 3408 | { |
0451c93c | 3409 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3410 | if (htab->sgotplt->size > 0) |
0451c93c MS |
3411 | { |
3412 | bfd_put_32 (output_bfd, | |
3413 | (sdyn == NULL ? (bfd_vma) 0 | |
3414 | : sdyn->output_section->vma + sdyn->output_offset), | |
3415 | htab->sgotplt->contents); | |
3416 | /* One entry for shared object struct ptr. */ | |
3417 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
3418 | /* One entry for _dl_runtime_resolve. */ | |
3419 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3420 | } | |
a85d7ed0 | 3421 | |
0451c93c MS |
3422 | elf_section_data (htab->sgotplt->output_section) |
3423 | ->this_hdr.sh_entsize = 4; | |
3424 | } | |
b34976b6 | 3425 | return TRUE; |
a85d7ed0 NC |
3426 | } |
3427 | ||
b34976b6 | 3428 | static bfd_boolean |
979f4a38 NC |
3429 | elf_s390_grok_prstatus (abfd, note) |
3430 | bfd * abfd; | |
3431 | Elf_Internal_Note * note; | |
3432 | { | |
3433 | int offset; | |
eea6121a | 3434 | unsigned int size; |
979f4a38 NC |
3435 | |
3436 | switch (note->descsz) | |
3437 | { | |
3438 | default: | |
b34976b6 | 3439 | return FALSE; |
979f4a38 NC |
3440 | |
3441 | case 224: /* S/390 Linux. */ | |
3442 | /* pr_cursig */ | |
3443 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
3444 | ||
3445 | /* pr_pid */ | |
3446 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
3447 | ||
3448 | /* pr_reg */ | |
3449 | offset = 72; | |
eea6121a | 3450 | size = 144; |
979f4a38 NC |
3451 | break; |
3452 | } | |
3453 | ||
3454 | /* Make a ".reg/999" section. */ | |
3455 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 3456 | size, note->descpos + offset); |
979f4a38 NC |
3457 | } |
3458 | ||
4c45e5c9 JJ |
3459 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3460 | or (bfd_vma) -1 if it should not be included. */ | |
3461 | ||
3462 | static bfd_vma | |
3463 | elf_s390_plt_sym_val (bfd_vma i, const asection *plt, | |
3464 | const arelent *rel ATTRIBUTE_UNUSED) | |
3465 | { | |
3466 | return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; | |
3467 | } | |
3468 | ||
3469 | ||
a85d7ed0 NC |
3470 | #define TARGET_BIG_SYM bfd_elf32_s390_vec |
3471 | #define TARGET_BIG_NAME "elf32-s390" | |
3472 | #define ELF_ARCH bfd_arch_s390 | |
3473 | #define ELF_MACHINE_CODE EM_S390 | |
3474 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3475 | #define ELF_MAXPAGESIZE 0x1000 | |
3476 | ||
3477 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3478 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3479 | #define elf_backend_want_got_plt 1 |
3480 | #define elf_backend_plt_readonly 1 | |
3481 | #define elf_backend_want_plt_sym 0 | |
3482 | #define elf_backend_got_header_size 12 | |
b491616a | 3483 | #define elf_backend_rela_normal 1 |
a85d7ed0 | 3484 | |
26e41594 | 3485 | #define elf_info_to_howto elf_s390_info_to_howto |
a85d7ed0 | 3486 | |
a85d7ed0 NC |
3487 | #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name |
3488 | #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3489 | #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
3490 | ||
3491 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
26e41594 | 3492 | #define elf_backend_check_relocs elf_s390_check_relocs |
0451c93c MS |
3493 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3494 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3495 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3496 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
26e41594 AM |
3497 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook |
3498 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3499 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
26e41594 | 3500 | #define elf_backend_relocate_section elf_s390_relocate_section |
a85d7ed0 | 3501 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections |
29c2fb7c | 3502 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
979f4a38 | 3503 | #define elf_backend_grok_prstatus elf_s390_grok_prstatus |
4c45e5c9 | 3504 | #define elf_backend_plt_sym_val elf_s390_plt_sym_val |
a85d7ed0 | 3505 | |
69fc87f1 | 3506 | #define bfd_elf32_mkobject elf_s390_mkobject |
26e41594 | 3507 | #define elf_backend_object_p elf_s390_object_p |
a85d7ed0 NC |
3508 | |
3509 | #include "elf32-target.h" |