Commit | Line | Data |
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a85d7ed0 | 1 | /* IBM S/390-specific support for 64-bit ELF |
4dfe6ac6 | 2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, |
1d7e9d18 | 3 | 2010, 2011, 2012 Free Software Foundation, Inc. |
a85d7ed0 NC |
4 | Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 10 | the Free Software Foundation; either version 3 of the License, or |
a85d7ed0 NC |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
3e110533 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
53e09e0a | 21 | 02110-1301, USA. */ |
a85d7ed0 | 22 | |
a85d7ed0 | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
a85d7ed0 NC |
25 | #include "bfdlink.h" |
26 | #include "libbfd.h" | |
27 | #include "elf-bfd.h" | |
28 | ||
29 | static reloc_howto_type *elf_s390_reloc_type_lookup | |
30 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
31 | static void elf_s390_info_to_howto | |
32 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
b34976b6 | 33 | static bfd_boolean elf_s390_is_local_label_name |
0451c93c MS |
34 | PARAMS ((bfd *, const char *)); |
35 | static struct bfd_hash_entry *link_hash_newfunc | |
a85d7ed0 NC |
36 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
37 | static struct bfd_link_hash_table *elf_s390_link_hash_table_create | |
38 | PARAMS ((bfd *)); | |
b34976b6 | 39 | static bfd_boolean create_got_section |
0451c93c | 40 | PARAMS((bfd *, struct bfd_link_info *)); |
b34976b6 | 41 | static bfd_boolean elf_s390_create_dynamic_sections |
0451c93c MS |
42 | PARAMS((bfd *, struct bfd_link_info *)); |
43 | static void elf_s390_copy_indirect_symbol | |
fcfa13d2 | 44 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, |
b48fa14c | 45 | struct elf_link_hash_entry *)); |
b34976b6 | 46 | static bfd_boolean elf_s390_check_relocs |
a85d7ed0 NC |
47 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
48 | const Elf_Internal_Rela *)); | |
5236c819 MS |
49 | struct elf_s390_link_hash_entry; |
50 | static void elf_s390_adjust_gotplt | |
51 | PARAMS ((struct elf_s390_link_hash_entry *)); | |
b34976b6 | 52 | static bfd_boolean elf_s390_adjust_dynamic_symbol |
a85d7ed0 | 53 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 54 | static bfd_boolean allocate_dynrelocs |
0451c93c | 55 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 56 | static bfd_boolean readonly_dynrelocs |
0451c93c | 57 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 58 | static bfd_boolean elf_s390_size_dynamic_sections |
a85d7ed0 | 59 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 60 | static bfd_boolean elf_s390_relocate_section |
a85d7ed0 NC |
61 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
62 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 63 | static bfd_boolean elf_s390_finish_dynamic_symbol |
a85d7ed0 NC |
64 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
65 | Elf_Internal_Sym *)); | |
0451c93c MS |
66 | static enum elf_reloc_type_class elf_s390_reloc_type_class |
67 | PARAMS ((const Elf_Internal_Rela *)); | |
b34976b6 | 68 | static bfd_boolean elf_s390_finish_dynamic_sections |
a85d7ed0 | 69 | PARAMS ((bfd *, struct bfd_link_info *)); |
5236c819 MS |
70 | static bfd_boolean elf_s390_object_p |
71 | PARAMS ((bfd *)); | |
69fc87f1 MS |
72 | static int elf_s390_tls_transition |
73 | PARAMS ((struct bfd_link_info *, int, int)); | |
74 | static bfd_reloc_status_type s390_tls_reloc | |
75 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
76 | static bfd_vma dtpoff_base | |
77 | PARAMS ((struct bfd_link_info *)); | |
78 | static bfd_vma tpoff | |
79 | PARAMS ((struct bfd_link_info *, bfd_vma)); | |
80 | static void invalid_tls_insn | |
81 | PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); | |
bd1ea41b MS |
82 | static bfd_reloc_status_type s390_elf_ldisp_reloc |
83 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
a85d7ed0 | 84 | |
a85d7ed0 NC |
85 | #include "elf/s390.h" |
86 | ||
87 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
88 | from smaller values. Start with zero, widen, *then* decrement. */ | |
89 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
90 | ||
91 | /* The relocation "howto" table. */ | |
92 | static reloc_howto_type elf_howto_table[] = | |
93 | { | |
94 | HOWTO (R_390_NONE, /* type */ | |
95 | 0, /* rightshift */ | |
96 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
97 | 0, /* bitsize */ | |
b34976b6 | 98 | FALSE, /* pc_relative */ |
a85d7ed0 NC |
99 | 0, /* bitpos */ |
100 | complain_overflow_dont, /* complain_on_overflow */ | |
101 | bfd_elf_generic_reloc, /* special_function */ | |
102 | "R_390_NONE", /* name */ | |
b34976b6 | 103 | FALSE, /* partial_inplace */ |
a85d7ed0 NC |
104 | 0, /* src_mask */ |
105 | 0, /* dst_mask */ | |
b34976b6 AM |
106 | FALSE), /* pcrel_offset */ |
107 | ||
5236c819 MS |
108 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
109 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), | |
110 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
111 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), | |
112 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
113 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), | |
114 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
115 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), | |
116 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
117 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), | |
15f8604d | 118 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, |
5236c819 MS |
119 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
120 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
121 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), | |
122 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
123 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), | |
124 | HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
125 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), | |
126 | HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
127 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), | |
128 | HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
129 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), | |
130 | HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
131 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), | |
132 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
133 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), | |
134 | HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
135 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), | |
136 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
137 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), | |
138 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
139 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), | |
140 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
141 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), | |
142 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
143 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), | |
144 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), | |
146 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
147 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), | |
148 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
149 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), | |
150 | HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
151 | bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), | |
152 | HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
153 | bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), | |
154 | HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
155 | bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), | |
156 | HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
157 | bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), | |
158 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
159 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), | |
160 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
161 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
162 | HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
163 | bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
164 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
165 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), | |
166 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
167 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), | |
168 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
169 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), | |
170 | HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
171 | bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), | |
172 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
173 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, 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 | HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
179 | bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
69fc87f1 MS |
180 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
181 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), | |
182 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
183 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), | |
184 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
185 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), | |
186 | EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ | |
187 | HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
188 | bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), | |
189 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
190 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), | |
191 | EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ | |
192 | HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
193 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), | |
194 | EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ | |
195 | HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
196 | bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), | |
197 | EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ | |
198 | HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
199 | bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), | |
200 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
201 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), | |
202 | EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ | |
203 | HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
204 | bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), | |
205 | EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ | |
206 | HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
207 | bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), | |
208 | HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
209 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), | |
210 | HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
211 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
212 | HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
213 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
bd1ea41b MS |
214 | HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
215 | s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), | |
216 | HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
217 | s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), | |
218 | HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
219 | s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), | |
220 | HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
221 | s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), | |
a85d7ed0 NC |
222 | }; |
223 | ||
224 | /* GNU extension to record C++ vtable hierarchy. */ | |
225 | static reloc_howto_type elf64_s390_vtinherit_howto = | |
b34976b6 | 226 | HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
a85d7ed0 | 227 | static reloc_howto_type elf64_s390_vtentry_howto = |
b34976b6 | 228 | HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); |
a85d7ed0 NC |
229 | |
230 | static reloc_howto_type * | |
231 | elf_s390_reloc_type_lookup (abfd, code) | |
232 | bfd *abfd ATTRIBUTE_UNUSED; | |
233 | bfd_reloc_code_real_type code; | |
234 | { | |
0451c93c MS |
235 | switch (code) |
236 | { | |
237 | case BFD_RELOC_NONE: | |
238 | return &elf_howto_table[(int) R_390_NONE]; | |
239 | case BFD_RELOC_8: | |
240 | return &elf_howto_table[(int) R_390_8]; | |
241 | case BFD_RELOC_390_12: | |
242 | return &elf_howto_table[(int) R_390_12]; | |
243 | case BFD_RELOC_16: | |
244 | return &elf_howto_table[(int) R_390_16]; | |
245 | case BFD_RELOC_32: | |
246 | return &elf_howto_table[(int) R_390_32]; | |
247 | case BFD_RELOC_CTOR: | |
248 | return &elf_howto_table[(int) R_390_32]; | |
249 | case BFD_RELOC_32_PCREL: | |
250 | return &elf_howto_table[(int) R_390_PC32]; | |
251 | case BFD_RELOC_390_GOT12: | |
252 | return &elf_howto_table[(int) R_390_GOT12]; | |
253 | case BFD_RELOC_32_GOT_PCREL: | |
254 | return &elf_howto_table[(int) R_390_GOT32]; | |
255 | case BFD_RELOC_390_PLT32: | |
256 | return &elf_howto_table[(int) R_390_PLT32]; | |
257 | case BFD_RELOC_390_COPY: | |
258 | return &elf_howto_table[(int) R_390_COPY]; | |
259 | case BFD_RELOC_390_GLOB_DAT: | |
260 | return &elf_howto_table[(int) R_390_GLOB_DAT]; | |
261 | case BFD_RELOC_390_JMP_SLOT: | |
262 | return &elf_howto_table[(int) R_390_JMP_SLOT]; | |
263 | case BFD_RELOC_390_RELATIVE: | |
264 | return &elf_howto_table[(int) R_390_RELATIVE]; | |
265 | case BFD_RELOC_32_GOTOFF: | |
5236c819 | 266 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
0451c93c MS |
267 | case BFD_RELOC_390_GOTPC: |
268 | return &elf_howto_table[(int) R_390_GOTPC]; | |
269 | case BFD_RELOC_390_GOT16: | |
270 | return &elf_howto_table[(int) R_390_GOT16]; | |
271 | case BFD_RELOC_16_PCREL: | |
272 | return &elf_howto_table[(int) R_390_PC16]; | |
273 | case BFD_RELOC_390_PC16DBL: | |
274 | return &elf_howto_table[(int) R_390_PC16DBL]; | |
275 | case BFD_RELOC_390_PLT16DBL: | |
276 | return &elf_howto_table[(int) R_390_PLT16DBL]; | |
0451c93c MS |
277 | case BFD_RELOC_390_PC32DBL: |
278 | return &elf_howto_table[(int) R_390_PC32DBL]; | |
279 | case BFD_RELOC_390_PLT32DBL: | |
280 | return &elf_howto_table[(int) R_390_PLT32DBL]; | |
281 | case BFD_RELOC_390_GOTPCDBL: | |
282 | return &elf_howto_table[(int) R_390_GOTPCDBL]; | |
283 | case BFD_RELOC_64: | |
284 | return &elf_howto_table[(int) R_390_64]; | |
285 | case BFD_RELOC_64_PCREL: | |
286 | return &elf_howto_table[(int) R_390_PC64]; | |
287 | case BFD_RELOC_390_GOT64: | |
288 | return &elf_howto_table[(int) R_390_GOT64]; | |
289 | case BFD_RELOC_390_PLT64: | |
290 | return &elf_howto_table[(int) R_390_PLT64]; | |
291 | case BFD_RELOC_390_GOTENT: | |
292 | return &elf_howto_table[(int) R_390_GOTENT]; | |
5236c819 MS |
293 | case BFD_RELOC_16_GOTOFF: |
294 | return &elf_howto_table[(int) R_390_GOTOFF16]; | |
295 | case BFD_RELOC_390_GOTOFF64: | |
296 | return &elf_howto_table[(int) R_390_GOTOFF64]; | |
297 | case BFD_RELOC_390_GOTPLT12: | |
298 | return &elf_howto_table[(int) R_390_GOTPLT12]; | |
299 | case BFD_RELOC_390_GOTPLT16: | |
300 | return &elf_howto_table[(int) R_390_GOTPLT16]; | |
301 | case BFD_RELOC_390_GOTPLT32: | |
302 | return &elf_howto_table[(int) R_390_GOTPLT32]; | |
303 | case BFD_RELOC_390_GOTPLT64: | |
304 | return &elf_howto_table[(int) R_390_GOTPLT64]; | |
305 | case BFD_RELOC_390_GOTPLTENT: | |
306 | return &elf_howto_table[(int) R_390_GOTPLTENT]; | |
307 | case BFD_RELOC_390_PLTOFF16: | |
308 | return &elf_howto_table[(int) R_390_PLTOFF16]; | |
309 | case BFD_RELOC_390_PLTOFF32: | |
310 | return &elf_howto_table[(int) R_390_PLTOFF32]; | |
311 | case BFD_RELOC_390_PLTOFF64: | |
312 | return &elf_howto_table[(int) R_390_PLTOFF64]; | |
69fc87f1 MS |
313 | case BFD_RELOC_390_TLS_LOAD: |
314 | return &elf_howto_table[(int) R_390_TLS_LOAD]; | |
315 | case BFD_RELOC_390_TLS_GDCALL: | |
316 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; | |
317 | case BFD_RELOC_390_TLS_LDCALL: | |
318 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; | |
319 | case BFD_RELOC_390_TLS_GD64: | |
320 | return &elf_howto_table[(int) R_390_TLS_GD64]; | |
321 | case BFD_RELOC_390_TLS_GOTIE12: | |
322 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; | |
323 | case BFD_RELOC_390_TLS_GOTIE64: | |
324 | return &elf_howto_table[(int) R_390_TLS_GOTIE64]; | |
325 | case BFD_RELOC_390_TLS_LDM64: | |
326 | return &elf_howto_table[(int) R_390_TLS_LDM64]; | |
327 | case BFD_RELOC_390_TLS_IE64: | |
328 | return &elf_howto_table[(int) R_390_TLS_IE64]; | |
329 | case BFD_RELOC_390_TLS_IEENT: | |
330 | return &elf_howto_table[(int) R_390_TLS_IEENT]; | |
331 | case BFD_RELOC_390_TLS_LE64: | |
332 | return &elf_howto_table[(int) R_390_TLS_LE64]; | |
333 | case BFD_RELOC_390_TLS_LDO64: | |
334 | return &elf_howto_table[(int) R_390_TLS_LDO64]; | |
335 | case BFD_RELOC_390_TLS_DTPMOD: | |
336 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; | |
337 | case BFD_RELOC_390_TLS_DTPOFF: | |
338 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; | |
339 | case BFD_RELOC_390_TLS_TPOFF: | |
340 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; | |
bd1ea41b MS |
341 | case BFD_RELOC_390_20: |
342 | return &elf_howto_table[(int) R_390_20]; | |
343 | case BFD_RELOC_390_GOT20: | |
344 | return &elf_howto_table[(int) R_390_GOT20]; | |
345 | case BFD_RELOC_390_GOTPLT20: | |
346 | return &elf_howto_table[(int) R_390_GOTPLT20]; | |
347 | case BFD_RELOC_390_TLS_GOTIE20: | |
348 | return &elf_howto_table[(int) R_390_TLS_GOTIE20]; | |
5236c819 MS |
349 | case BFD_RELOC_VTABLE_INHERIT: |
350 | return &elf64_s390_vtinherit_howto; | |
351 | case BFD_RELOC_VTABLE_ENTRY: | |
352 | return &elf64_s390_vtentry_howto; | |
0451c93c MS |
353 | default: |
354 | break; | |
355 | } | |
a85d7ed0 NC |
356 | return 0; |
357 | } | |
358 | ||
157090f7 AM |
359 | static reloc_howto_type * |
360 | elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
361 | const char *r_name) | |
362 | { | |
363 | unsigned int i; | |
364 | ||
365 | for (i = 0; | |
366 | i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); | |
367 | i++) | |
368 | if (elf_howto_table[i].name != NULL | |
369 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
370 | return &elf_howto_table[i]; | |
371 | ||
372 | if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0) | |
373 | return &elf64_s390_vtinherit_howto; | |
374 | if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0) | |
375 | return &elf64_s390_vtentry_howto; | |
376 | ||
377 | return NULL; | |
378 | } | |
379 | ||
a85d7ed0 NC |
380 | /* We need to use ELF64_R_TYPE so we have our own copy of this function, |
381 | and elf64-s390.c has its own copy. */ | |
382 | ||
383 | static void | |
384 | elf_s390_info_to_howto (abfd, cache_ptr, dst) | |
385 | bfd *abfd ATTRIBUTE_UNUSED; | |
386 | arelent *cache_ptr; | |
387 | Elf_Internal_Rela *dst; | |
388 | { | |
d0fb9a8d JJ |
389 | unsigned int r_type = ELF64_R_TYPE(dst->r_info); |
390 | switch (r_type) | |
a85d7ed0 NC |
391 | { |
392 | case R_390_GNU_VTINHERIT: | |
393 | cache_ptr->howto = &elf64_s390_vtinherit_howto; | |
394 | break; | |
395 | ||
396 | case R_390_GNU_VTENTRY: | |
397 | cache_ptr->howto = &elf64_s390_vtentry_howto; | |
398 | break; | |
399 | ||
400 | default: | |
d0fb9a8d JJ |
401 | if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) |
402 | { | |
403 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
404 | abfd, (int) r_type); | |
405 | r_type = R_390_NONE; | |
406 | } | |
407 | cache_ptr->howto = &elf_howto_table[r_type]; | |
99c79b2e | 408 | } |
a85d7ed0 NC |
409 | } |
410 | ||
69fc87f1 MS |
411 | /* A relocation function which doesn't do anything. */ |
412 | static bfd_reloc_status_type | |
413 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 414 | output_bfd, error_message) |
69fc87f1 MS |
415 | bfd *abfd ATTRIBUTE_UNUSED; |
416 | arelent *reloc_entry; | |
417 | asymbol *symbol ATTRIBUTE_UNUSED; | |
418 | PTR data ATTRIBUTE_UNUSED; | |
419 | asection *input_section; | |
420 | bfd *output_bfd; | |
421 | char **error_message ATTRIBUTE_UNUSED; | |
422 | { | |
423 | if (output_bfd) | |
424 | reloc_entry->address += input_section->output_offset; | |
425 | return bfd_reloc_ok; | |
426 | } | |
427 | ||
bd1ea41b MS |
428 | /* Handle the large displacement relocs. */ |
429 | static bfd_reloc_status_type | |
430 | s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, | |
431 | output_bfd, error_message) | |
432 | bfd *abfd; | |
433 | arelent *reloc_entry; | |
434 | asymbol *symbol; | |
435 | PTR data; | |
436 | asection *input_section; | |
437 | bfd *output_bfd; | |
438 | char **error_message ATTRIBUTE_UNUSED; | |
439 | { | |
440 | reloc_howto_type *howto = reloc_entry->howto; | |
441 | bfd_vma relocation; | |
442 | bfd_vma insn; | |
443 | ||
444 | if (output_bfd != (bfd *) NULL | |
445 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
446 | && (! howto->partial_inplace | |
447 | || reloc_entry->addend == 0)) | |
448 | { | |
449 | reloc_entry->address += input_section->output_offset; | |
450 | return bfd_reloc_ok; | |
451 | } | |
452 | if (output_bfd != NULL) | |
453 | return bfd_reloc_continue; | |
454 | ||
07515404 | 455 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
bd1ea41b MS |
456 | return bfd_reloc_outofrange; |
457 | ||
458 | relocation = (symbol->value | |
459 | + symbol->section->output_section->vma | |
460 | + symbol->section->output_offset); | |
461 | relocation += reloc_entry->addend; | |
462 | if (howto->pc_relative) | |
463 | { | |
464 | relocation -= (input_section->output_section->vma | |
465 | + input_section->output_offset); | |
466 | relocation -= reloc_entry->address; | |
467 | } | |
468 | ||
469 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
470 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; | |
471 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
472 | ||
473 | if ((bfd_signed_vma) relocation < - 0x80000 | |
474 | || (bfd_signed_vma) relocation > 0x7ffff) | |
475 | return bfd_reloc_overflow; | |
476 | else | |
477 | return bfd_reloc_ok; | |
478 | } | |
479 | ||
b34976b6 | 480 | static bfd_boolean |
a85d7ed0 NC |
481 | elf_s390_is_local_label_name (abfd, name) |
482 | bfd *abfd; | |
483 | const char *name; | |
484 | { | |
485 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 486 | return TRUE; |
a85d7ed0 NC |
487 | |
488 | return _bfd_elf_is_local_label_name (abfd, name); | |
489 | } | |
490 | ||
491 | /* Functions for the 390 ELF linker. */ | |
492 | ||
493 | /* The name of the dynamic interpreter. This is put in the .interp | |
494 | section. */ | |
495 | ||
496 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
497 | ||
64285810 MS |
498 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
499 | copying dynamic variables from a shared lib into an app's dynbss | |
500 | section, and instead use a dynamic relocation to point into the | |
501 | shared lib. */ | |
502 | #define ELIMINATE_COPY_RELOCS 1 | |
503 | ||
a85d7ed0 NC |
504 | /* The size in bytes of the first entry in the procedure linkage table. */ |
505 | #define PLT_FIRST_ENTRY_SIZE 32 | |
506 | /* The size in bytes of an entry in the procedure linkage table. */ | |
99c79b2e | 507 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
508 | |
509 | #define GOT_ENTRY_SIZE 8 | |
510 | ||
511 | /* The first three entries in a procedure linkage table are reserved, | |
512 | and the initial contents are unimportant (we zero them out). | |
513 | Subsequent entries look like this. See the SVR4 ABI 386 | |
514 | supplement to see how this works. */ | |
515 | ||
516 | /* For the s390, simple addr offset can only be 0 - 4096. | |
517 | To use the full 16777216 TB address space, several instructions | |
518 | are needed to load an address in a register and execute | |
519 | a branch( or just saving the address) | |
520 | ||
99c79b2e | 521 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
522 | |
523 | /* The first 3 words in the GOT are then reserved. | |
524 | Word 0 is the address of the dynamic table. | |
525 | Word 1 is a pointer to a structure describing the object | |
526 | Word 2 is used to point to the loader entry address. | |
527 | ||
528 | The code for PLT entries looks like this: | |
529 | ||
530 | The GOT holds the address in the PLT to be executed. | |
531 | The loader then gets: | |
532 | 24(15) = Pointer to the structure describing the object. | |
99c79b2e | 533 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
534 | The loader must then find the module where the function is |
535 | and insert the address in the GOT. | |
536 | ||
537 | PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 | |
538 | LG 1,0(1) # 6 bytes Load address from GOT in r1 | |
539 | BCR 15,1 # 2 bytes Jump to address | |
540 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
541 | LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 | |
542 | BRCL 15,-x # 6 bytes Jump to start of PLT | |
543 | .long ? # 4 bytes offset into symbol table | |
544 | ||
545 | Total = 32 bytes per PLT entry | |
546 | Fixup at offset 2: relative address to GOT entry | |
547 | Fixup at offset 22: relative branch to PLT0 | |
548 | Fixup at offset 28: 32 bit offset into symbol table | |
549 | ||
550 | A 32 bit offset into the symbol table is enough. It allows for symbol | |
551 | tables up to a size of 2 gigabyte. A single dynamic object (the main | |
552 | program, any shared library) is limited to 4GB in size and I want to see | |
553 | the program that manages to have a symbol table of more than 2 GB with a | |
554 | total size of at max 4 GB. */ | |
555 | ||
9aa17453 AK |
556 | static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] = |
557 | { | |
558 | 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ | |
559 | 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */ | |
560 | 0x07, 0xf1, /* br %r1 */ | |
561 | 0x0d, 0x10, /* basr %r1,%r0 */ | |
562 | 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */ | |
563 | 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */ | |
564 | 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */ | |
565 | }; | |
a85d7ed0 NC |
566 | |
567 | /* The first PLT entry pushes the offset into the symbol table | |
568 | from R1 onto the stack at 8(15) and the loader object info | |
569 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
570 | ||
571 | /* The first entry in the PLT: | |
572 | ||
573 | PLT0: | |
574 | STG 1,56(15) # r1 contains the offset into the symbol table | |
575 | LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table | |
576 | MVC 48(8,15),8(1) # move loader ino (object struct address) to stack | |
577 | LG 1,16(1) # get entry address of loader | |
578 | BCR 15,1 # jump to loader | |
579 | ||
580 | Fixup at offset 8: relative address to start of GOT. */ | |
581 | ||
9aa17453 AK |
582 | static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] = |
583 | { | |
584 | 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */ | |
585 | 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */ | |
586 | 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */ | |
587 | 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */ | |
588 | 0x07, 0xf1, /* br %r1 */ | |
589 | 0x07, 0x00, /* nopr %r0 */ | |
590 | 0x07, 0x00, /* nopr %r0 */ | |
591 | 0x07, 0x00 /* nopr %r0 */ | |
592 | }; | |
a85d7ed0 | 593 | |
a85d7ed0 NC |
594 | |
595 | /* s390 ELF linker hash entry. */ | |
596 | ||
597 | struct elf_s390_link_hash_entry | |
598 | { | |
0451c93c | 599 | struct elf_link_hash_entry elf; |
a85d7ed0 | 600 | |
0451c93c | 601 | /* Track dynamic relocs copied for this symbol. */ |
00d8c7a9 | 602 | struct elf_dyn_relocs *dyn_relocs; |
5236c819 MS |
603 | |
604 | /* Number of GOTPLT references for a function. */ | |
605 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
606 | |
607 | #define GOT_UNKNOWN 0 | |
608 | #define GOT_NORMAL 1 | |
609 | #define GOT_TLS_GD 2 | |
610 | #define GOT_TLS_IE 3 | |
611 | #define GOT_TLS_IE_NLT 3 | |
612 | unsigned char tls_type; | |
a85d7ed0 NC |
613 | }; |
614 | ||
69fc87f1 MS |
615 | #define elf_s390_hash_entry(ent) \ |
616 | ((struct elf_s390_link_hash_entry *)(ent)) | |
617 | ||
0ffa91dd NC |
618 | /* NOTE: Keep this structure in sync with |
619 | the one declared in elf32-s390.c. */ | |
69fc87f1 MS |
620 | struct elf_s390_obj_tdata |
621 | { | |
622 | struct elf_obj_tdata root; | |
623 | ||
0ffa91dd | 624 | /* TLS type for each local got entry. */ |
69fc87f1 MS |
625 | char *local_got_tls_type; |
626 | }; | |
627 | ||
628 | #define elf_s390_tdata(abfd) \ | |
629 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
630 | ||
631 | #define elf_s390_local_got_tls_type(abfd) \ | |
632 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
633 | ||
0ffa91dd NC |
634 | #define is_s390_elf(bfd) \ |
635 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
636 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 637 | && elf_object_id (bfd) == S390_ELF_DATA) |
0ffa91dd | 638 | |
69fc87f1 | 639 | static bfd_boolean |
62d7a5f6 | 640 | elf_s390_mkobject (bfd *abfd) |
69fc87f1 | 641 | { |
0ffa91dd | 642 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), |
4dfe6ac6 | 643 | S390_ELF_DATA); |
69fc87f1 MS |
644 | } |
645 | ||
646 | static bfd_boolean | |
647 | elf_s390_object_p (abfd) | |
648 | bfd *abfd; | |
649 | { | |
69fc87f1 MS |
650 | /* Set the right machine number for an s390 elf32 file. */ |
651 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); | |
652 | } | |
653 | ||
a85d7ed0 NC |
654 | /* s390 ELF linker hash table. */ |
655 | ||
656 | struct elf_s390_link_hash_table | |
657 | { | |
0451c93c | 658 | struct elf_link_hash_table elf; |
a85d7ed0 | 659 | |
0451c93c MS |
660 | /* Short-cuts to get to dynamic linker sections. */ |
661 | asection *sgot; | |
662 | asection *sgotplt; | |
663 | asection *srelgot; | |
664 | asection *splt; | |
665 | asection *srelplt; | |
666 | asection *sdynbss; | |
667 | asection *srelbss; | |
ec338859 | 668 | |
69fc87f1 MS |
669 | union { |
670 | bfd_signed_vma refcount; | |
671 | bfd_vma offset; | |
672 | } tls_ldm_got; | |
673 | ||
87d72d41 AM |
674 | /* Small local sym cache. */ |
675 | struct sym_cache sym_cache; | |
0451c93c | 676 | }; |
a85d7ed0 NC |
677 | |
678 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
679 | ||
680 | #define elf_s390_hash_table(p) \ | |
4dfe6ac6 NC |
681 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
682 | == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) | |
a85d7ed0 NC |
683 | |
684 | /* Create an entry in an s390 ELF linker hash table. */ | |
685 | ||
686 | static struct bfd_hash_entry * | |
0451c93c | 687 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
688 | struct bfd_hash_entry *entry; |
689 | struct bfd_hash_table *table; | |
690 | const char *string; | |
691 | { | |
a85d7ed0 NC |
692 | /* Allocate the structure if it has not already been allocated by a |
693 | subclass. */ | |
0451c93c MS |
694 | if (entry == NULL) |
695 | { | |
696 | entry = bfd_hash_allocate (table, | |
697 | sizeof (struct elf_s390_link_hash_entry)); | |
698 | if (entry == NULL) | |
699 | return entry; | |
700 | } | |
a85d7ed0 NC |
701 | |
702 | /* Call the allocation method of the superclass. */ | |
0451c93c MS |
703 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
704 | if (entry != NULL) | |
a85d7ed0 | 705 | { |
0451c93c MS |
706 | struct elf_s390_link_hash_entry *eh; |
707 | ||
708 | eh = (struct elf_s390_link_hash_entry *) entry; | |
709 | eh->dyn_relocs = NULL; | |
5236c819 | 710 | eh->gotplt_refcount = 0; |
69fc87f1 | 711 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
712 | } |
713 | ||
0451c93c | 714 | return entry; |
a85d7ed0 NC |
715 | } |
716 | ||
717 | /* Create an s390 ELF linker hash table. */ | |
718 | ||
719 | static struct bfd_link_hash_table * | |
720 | elf_s390_link_hash_table_create (abfd) | |
721 | bfd *abfd; | |
722 | { | |
723 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 724 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 725 | |
e2d34d7d | 726 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 727 | if (ret == NULL) |
a85d7ed0 NC |
728 | return NULL; |
729 | ||
66eb6687 | 730 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
4dfe6ac6 NC |
731 | sizeof (struct elf_s390_link_hash_entry), |
732 | S390_ELF_DATA)) | |
a85d7ed0 | 733 | { |
e2d34d7d | 734 | free (ret); |
a85d7ed0 NC |
735 | return NULL; |
736 | } | |
737 | ||
0451c93c MS |
738 | ret->sgot = NULL; |
739 | ret->sgotplt = NULL; | |
740 | ret->srelgot = NULL; | |
741 | ret->splt = NULL; | |
742 | ret->srelplt = NULL; | |
743 | ret->sdynbss = NULL; | |
744 | ret->srelbss = NULL; | |
69fc87f1 | 745 | ret->tls_ldm_got.refcount = 0; |
87d72d41 | 746 | ret->sym_cache.abfd = NULL; |
0451c93c MS |
747 | |
748 | return &ret->elf.root; | |
749 | } | |
750 | ||
751 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
752 | shortcuts to them in our hash table. */ | |
753 | ||
b34976b6 | 754 | static bfd_boolean |
4dfe6ac6 NC |
755 | create_got_section (bfd *dynobj, |
756 | struct bfd_link_info *info) | |
0451c93c MS |
757 | { |
758 | struct elf_s390_link_hash_table *htab; | |
759 | ||
760 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 761 | return FALSE; |
0451c93c MS |
762 | |
763 | htab = elf_s390_hash_table (info); | |
4dfe6ac6 NC |
764 | if (htab == NULL) |
765 | return FALSE; | |
766 | ||
0451c93c MS |
767 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
768 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
64e77c6d L |
769 | htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
770 | if (!htab->sgot || !htab->sgotplt || !htab->srelgot) | |
0451c93c | 771 | abort (); |
b34976b6 | 772 | return TRUE; |
0451c93c MS |
773 | } |
774 | ||
775 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
776 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
777 | hash table. */ | |
778 | ||
b34976b6 | 779 | static bfd_boolean |
4dfe6ac6 NC |
780 | elf_s390_create_dynamic_sections (bfd *dynobj, |
781 | struct bfd_link_info *info) | |
0451c93c MS |
782 | { |
783 | struct elf_s390_link_hash_table *htab; | |
784 | ||
785 | htab = elf_s390_hash_table (info); | |
4dfe6ac6 NC |
786 | if (htab == NULL) |
787 | return FALSE; | |
788 | ||
0451c93c | 789 | if (!htab->sgot && !create_got_section (dynobj, info)) |
b34976b6 | 790 | return FALSE; |
0451c93c MS |
791 | |
792 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 793 | return FALSE; |
0451c93c MS |
794 | |
795 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
796 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
797 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
798 | if (!info->shared) | |
799 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
800 | ||
801 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
802 | || (!info->shared && !htab->srelbss)) | |
803 | abort (); | |
804 | ||
b34976b6 | 805 | return TRUE; |
a85d7ed0 NC |
806 | } |
807 | ||
0451c93c MS |
808 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
809 | ||
810 | static void | |
fcfa13d2 AM |
811 | elf_s390_copy_indirect_symbol (info, dir, ind) |
812 | struct bfd_link_info *info; | |
0451c93c MS |
813 | struct elf_link_hash_entry *dir, *ind; |
814 | { | |
815 | struct elf_s390_link_hash_entry *edir, *eind; | |
816 | ||
817 | edir = (struct elf_s390_link_hash_entry *) dir; | |
818 | eind = (struct elf_s390_link_hash_entry *) ind; | |
819 | ||
820 | if (eind->dyn_relocs != NULL) | |
821 | { | |
822 | if (edir->dyn_relocs != NULL) | |
823 | { | |
00d8c7a9 AK |
824 | struct elf_dyn_relocs **pp; |
825 | struct elf_dyn_relocs *p; | |
0451c93c | 826 | |
fcfa13d2 | 827 | /* Add reloc counts against the indirect sym to the direct sym |
0451c93c MS |
828 | list. Merge any entries against the same section. */ |
829 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
830 | { | |
00d8c7a9 | 831 | struct elf_dyn_relocs *q; |
0451c93c MS |
832 | |
833 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
834 | if (q->sec == p->sec) | |
835 | { | |
836 | q->pc_count += p->pc_count; | |
837 | q->count += p->count; | |
838 | *pp = p->next; | |
839 | break; | |
840 | } | |
841 | if (q == NULL) | |
842 | pp = &p->next; | |
843 | } | |
844 | *pp = edir->dyn_relocs; | |
845 | } | |
846 | ||
847 | edir->dyn_relocs = eind->dyn_relocs; | |
848 | eind->dyn_relocs = NULL; | |
849 | } | |
850 | ||
69fc87f1 MS |
851 | if (ind->root.type == bfd_link_hash_indirect |
852 | && dir->got.refcount <= 0) | |
853 | { | |
854 | edir->tls_type = eind->tls_type; | |
855 | eind->tls_type = GOT_UNKNOWN; | |
856 | } | |
857 | ||
64285810 MS |
858 | if (ELIMINATE_COPY_RELOCS |
859 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
860 | && dir->dynamic_adjusted) |
861 | { | |
862 | /* If called to transfer flags for a weakdef during processing | |
863 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
864 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
865 | dir->ref_dynamic |= ind->ref_dynamic; | |
866 | dir->ref_regular |= ind->ref_regular; | |
867 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
868 | dir->needs_plt |= ind->needs_plt; | |
869 | } | |
64285810 | 870 | else |
fcfa13d2 | 871 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
0451c93c | 872 | } |
a85d7ed0 | 873 | |
69fc87f1 MS |
874 | static int |
875 | elf_s390_tls_transition (info, r_type, is_local) | |
876 | struct bfd_link_info *info; | |
877 | int r_type; | |
878 | int is_local; | |
879 | { | |
880 | if (info->shared) | |
881 | return r_type; | |
882 | ||
883 | switch (r_type) | |
884 | { | |
885 | case R_390_TLS_GD64: | |
886 | case R_390_TLS_IE64: | |
887 | if (is_local) | |
888 | return R_390_TLS_LE64; | |
889 | return R_390_TLS_IE64; | |
890 | case R_390_TLS_GOTIE64: | |
891 | if (is_local) | |
892 | return R_390_TLS_LE64; | |
893 | return R_390_TLS_GOTIE64; | |
894 | case R_390_TLS_LDM64: | |
895 | return R_390_TLS_LE64; | |
896 | } | |
897 | ||
898 | return r_type; | |
899 | } | |
900 | ||
a85d7ed0 NC |
901 | /* Look through the relocs for a section during the first phase, and |
902 | allocate space in the global offset table or procedure linkage | |
903 | table. */ | |
904 | ||
b34976b6 | 905 | static bfd_boolean |
4dfe6ac6 NC |
906 | elf_s390_check_relocs (bfd *abfd, |
907 | struct bfd_link_info *info, | |
908 | asection *sec, | |
909 | const Elf_Internal_Rela *relocs) | |
a85d7ed0 | 910 | { |
0451c93c | 911 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
912 | Elf_Internal_Shdr *symtab_hdr; |
913 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
914 | const Elf_Internal_Rela *rel; |
915 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 916 | asection *sreloc; |
5236c819 | 917 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 918 | int tls_type, old_tls_type; |
a85d7ed0 | 919 | |
1049f94e | 920 | if (info->relocatable) |
b34976b6 | 921 | return TRUE; |
a85d7ed0 | 922 | |
0ffa91dd NC |
923 | BFD_ASSERT (is_s390_elf (abfd)); |
924 | ||
0451c93c | 925 | htab = elf_s390_hash_table (info); |
4dfe6ac6 NC |
926 | if (htab == NULL) |
927 | return FALSE; | |
928 | ||
0ffa91dd | 929 | symtab_hdr = &elf_symtab_hdr (abfd); |
a85d7ed0 | 930 | sym_hashes = elf_sym_hashes (abfd); |
5236c819 | 931 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 932 | |
a85d7ed0 NC |
933 | sreloc = NULL; |
934 | ||
935 | rel_end = relocs + sec->reloc_count; | |
936 | for (rel = relocs; rel < rel_end; rel++) | |
937 | { | |
69fc87f1 | 938 | unsigned int r_type; |
a85d7ed0 NC |
939 | unsigned long r_symndx; |
940 | struct elf_link_hash_entry *h; | |
941 | ||
942 | r_symndx = ELF64_R_SYM (rel->r_info); | |
943 | ||
0451c93c MS |
944 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
945 | { | |
d003868e AM |
946 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
947 | abfd, | |
0451c93c | 948 | r_symndx); |
b34976b6 | 949 | return FALSE; |
0451c93c MS |
950 | } |
951 | ||
a85d7ed0 NC |
952 | if (r_symndx < symtab_hdr->sh_info) |
953 | h = NULL; | |
954 | else | |
973a3492 L |
955 | { |
956 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
957 | while (h->root.type == bfd_link_hash_indirect | |
958 | || h->root.type == bfd_link_hash_warning) | |
959 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
960 | } | |
a85d7ed0 | 961 | |
5236c819 MS |
962 | /* Create got section and local_got_refcounts array if they |
963 | are needed. */ | |
69fc87f1 MS |
964 | r_type = elf_s390_tls_transition (info, |
965 | ELF64_R_TYPE (rel->r_info), | |
966 | h == NULL); | |
967 | switch (r_type) | |
a85d7ed0 NC |
968 | { |
969 | case R_390_GOT12: | |
947216bf | 970 | case R_390_GOT16: |
bd1ea41b | 971 | case R_390_GOT20: |
a85d7ed0 NC |
972 | case R_390_GOT32: |
973 | case R_390_GOT64: | |
974 | case R_390_GOTENT: | |
5236c819 MS |
975 | case R_390_GOTPLT12: |
976 | case R_390_GOTPLT16: | |
bd1ea41b | 977 | case R_390_GOTPLT20: |
5236c819 MS |
978 | case R_390_GOTPLT32: |
979 | case R_390_GOTPLT64: | |
980 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
981 | case R_390_TLS_GD64: |
982 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 983 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
984 | case R_390_TLS_GOTIE64: |
985 | case R_390_TLS_IEENT: | |
986 | case R_390_TLS_IE64: | |
987 | case R_390_TLS_LDM64: | |
5236c819 MS |
988 | if (h == NULL |
989 | && local_got_refcounts == NULL) | |
a85d7ed0 | 990 | { |
5236c819 | 991 | bfd_size_type size; |
0451c93c | 992 | |
5236c819 | 993 | size = symtab_hdr->sh_info; |
69fc87f1 | 994 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
995 | local_got_refcounts = ((bfd_signed_vma *) |
996 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 997 | if (local_got_refcounts == NULL) |
5236c819 MS |
998 | return FALSE; |
999 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
1000 | elf_s390_local_got_tls_type (abfd) |
1001 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 1002 | } |
5236c819 MS |
1003 | /* Fall through. */ |
1004 | case R_390_GOTOFF16: | |
1005 | case R_390_GOTOFF32: | |
1006 | case R_390_GOTOFF64: | |
0451c93c MS |
1007 | case R_390_GOTPC: |
1008 | case R_390_GOTPCDBL: | |
1009 | if (htab->sgot == NULL) | |
1010 | { | |
1011 | if (htab->elf.dynobj == NULL) | |
1012 | htab->elf.dynobj = abfd; | |
1013 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1014 | return FALSE; |
0451c93c | 1015 | } |
5236c819 MS |
1016 | } |
1017 | ||
69fc87f1 | 1018 | switch (r_type) |
5236c819 | 1019 | { |
5236c819 MS |
1020 | case R_390_GOTOFF16: |
1021 | case R_390_GOTOFF32: | |
1022 | case R_390_GOTOFF64: | |
1023 | case R_390_GOTPC: | |
1024 | case R_390_GOTPCDBL: | |
1025 | /* Got is created, nothing to be done. */ | |
0451c93c | 1026 | break; |
ec338859 | 1027 | |
947216bf | 1028 | case R_390_PLT16DBL: |
a85d7ed0 NC |
1029 | case R_390_PLT32: |
1030 | case R_390_PLT32DBL: | |
1031 | case R_390_PLT64: | |
5236c819 MS |
1032 | case R_390_PLTOFF16: |
1033 | case R_390_PLTOFF32: | |
1034 | case R_390_PLTOFF64: | |
a85d7ed0 | 1035 | /* This symbol requires a procedure linkage table entry. We |
947216bf AM |
1036 | actually build the entry in adjust_dynamic_symbol, |
1037 | because this might be a case of linking PIC code which is | |
1038 | never referenced by a dynamic object, in which case we | |
1039 | don't need to generate a procedure linkage table entry | |
1040 | after all. */ | |
ec338859 | 1041 | |
a85d7ed0 | 1042 | /* If this is a local symbol, we resolve it directly without |
947216bf | 1043 | creating a procedure linkage table entry. */ |
5236c819 MS |
1044 | if (h != NULL) |
1045 | { | |
f5385ebf | 1046 | h->needs_plt = 1; |
5236c819 MS |
1047 | h->plt.refcount += 1; |
1048 | } | |
1049 | break; | |
ec338859 | 1050 | |
5236c819 MS |
1051 | case R_390_GOTPLT12: |
1052 | case R_390_GOTPLT16: | |
bd1ea41b | 1053 | case R_390_GOTPLT20: |
5236c819 MS |
1054 | case R_390_GOTPLT32: |
1055 | case R_390_GOTPLT64: | |
1056 | case R_390_GOTPLTENT: | |
1057 | /* This symbol requires either a procedure linkage table entry | |
1058 | or an entry in the local got. We actually build the entry | |
1059 | in adjust_dynamic_symbol because whether this is really a | |
1060 | global reference can change and with it the fact if we have | |
1061 | to create a plt entry or a local got entry. To be able to | |
1062 | make a once global symbol a local one we have to keep track | |
1063 | of the number of gotplt references that exist for this | |
1064 | symbol. */ | |
1065 | if (h != NULL) | |
1066 | { | |
1067 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
f5385ebf | 1068 | h->needs_plt = 1; |
5236c819 MS |
1069 | h->plt.refcount += 1; |
1070 | } | |
69fc87f1 MS |
1071 | else |
1072 | local_got_refcounts[r_symndx] += 1; | |
1073 | break; | |
1074 | ||
1075 | case R_390_TLS_LDM64: | |
1076 | htab->tls_ldm_got.refcount += 1; | |
1077 | break; | |
1078 | ||
1079 | case R_390_TLS_IE64: | |
1080 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1081 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1082 | case R_390_TLS_GOTIE64: |
1083 | case R_390_TLS_IEENT: | |
1084 | if (info->shared) | |
1085 | info->flags |= DF_STATIC_TLS; | |
1086 | /* Fall through */ | |
1087 | ||
1088 | case R_390_GOT12: | |
26e41594 | 1089 | case R_390_GOT16: |
bd1ea41b | 1090 | case R_390_GOT20: |
69fc87f1 MS |
1091 | case R_390_GOT32: |
1092 | case R_390_GOT64: | |
1093 | case R_390_GOTENT: | |
1094 | case R_390_TLS_GD64: | |
1095 | /* This symbol requires a global offset table entry. */ | |
1096 | switch (r_type) | |
1097 | { | |
1098 | default: | |
1099 | case R_390_GOT12: | |
1100 | case R_390_GOT16: | |
bd1ea41b | 1101 | case R_390_GOT20: |
69fc87f1 MS |
1102 | case R_390_GOT32: |
1103 | case R_390_GOTENT: | |
1104 | tls_type = GOT_NORMAL; | |
1105 | break; | |
1106 | case R_390_TLS_GD64: | |
1107 | tls_type = GOT_TLS_GD; | |
1108 | break; | |
1109 | case R_390_TLS_IE64: | |
1110 | case R_390_TLS_GOTIE64: | |
1111 | tls_type = GOT_TLS_IE; | |
1112 | break; | |
1113 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1114 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1115 | case R_390_TLS_IEENT: |
1116 | tls_type = GOT_TLS_IE_NLT; | |
1117 | break; | |
1118 | } | |
1119 | ||
1120 | if (h != NULL) | |
1121 | { | |
1122 | h->got.refcount += 1; | |
1123 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1124 | } | |
5236c819 MS |
1125 | else |
1126 | { | |
1127 | local_got_refcounts[r_symndx] += 1; | |
69fc87f1 | 1128 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; |
5236c819 | 1129 | } |
69fc87f1 MS |
1130 | /* If a TLS symbol is accessed using IE at least once, |
1131 | there is no point to use dynamic model for it. */ | |
1132 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1133 | { | |
1134 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1135 | { | |
1136 | (*_bfd_error_handler) | |
d003868e AM |
1137 | (_("%B: `%s' accessed both as normal and thread local symbol"), |
1138 | abfd, h->root.root.string); | |
69fc87f1 MS |
1139 | return FALSE; |
1140 | } | |
1141 | if (old_tls_type > tls_type) | |
1142 | tls_type = old_tls_type; | |
1143 | } | |
1144 | ||
1145 | if (old_tls_type != tls_type) | |
1146 | { | |
1147 | if (h != NULL) | |
1148 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1149 | else | |
1150 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1151 | } | |
1152 | ||
1153 | if (r_type != R_390_TLS_IE64) | |
1154 | break; | |
1155 | /* Fall through */ | |
1156 | ||
1157 | case R_390_TLS_LE64: | |
1158 | if (!info->shared) | |
1159 | break; | |
1160 | info->flags |= DF_STATIC_TLS; | |
1161 | /* Fall through */ | |
ec338859 | 1162 | |
947216bf AM |
1163 | case R_390_8: |
1164 | case R_390_16: | |
a85d7ed0 NC |
1165 | case R_390_32: |
1166 | case R_390_64: | |
947216bf AM |
1167 | case R_390_PC16: |
1168 | case R_390_PC16DBL: | |
a85d7ed0 NC |
1169 | case R_390_PC32: |
1170 | case R_390_PC32DBL: | |
1171 | case R_390_PC64: | |
0451c93c MS |
1172 | if (h != NULL && !info->shared) |
1173 | { | |
1174 | /* If this reloc is in a read-only section, we might | |
1175 | need a copy reloc. We can't check reliably at this | |
1176 | stage whether the section is read-only, as input | |
1177 | sections have not yet been mapped to output sections. | |
1178 | Tentatively set the flag for now, and correct in | |
1179 | adjust_dynamic_symbol. */ | |
f5385ebf | 1180 | h->non_got_ref = 1; |
ec338859 | 1181 | |
0451c93c MS |
1182 | /* We may need a .plt entry if the function this reloc |
1183 | refers to is in a shared lib. */ | |
1184 | h->plt.refcount += 1; | |
1185 | } | |
ec338859 | 1186 | |
a85d7ed0 | 1187 | /* If we are creating a shared library, and this is a reloc |
0451c93c MS |
1188 | against a global symbol, or a non PC relative reloc |
1189 | against a local symbol, then we need to copy the reloc | |
1190 | into the shared library. However, if we are linking with | |
1191 | -Bsymbolic, we do not need to copy a reloc against a | |
1192 | global symbol which is defined in an object we are | |
1193 | including in the link (i.e., DEF_REGULAR is set). At | |
1194 | this point we have not seen all the input files, so it is | |
1195 | possible that DEF_REGULAR is not set now but will be set | |
1196 | later (it is never cleared). In case of a weak definition, | |
1197 | DEF_REGULAR may be cleared later by a strong definition in | |
1198 | a shared library. We account for that possibility below by | |
1199 | storing information in the relocs_copied field of the hash | |
1200 | table entry. A similar situation occurs when creating | |
1201 | shared libraries and symbol visibility changes render the | |
1202 | symbol local. | |
1203 | ||
1204 | If on the other hand, we are creating an executable, we | |
1205 | may need to keep relocations for symbols satisfied by a | |
1206 | dynamic library if we manage to avoid copy relocs for the | |
1207 | symbol. */ | |
1208 | if ((info->shared | |
1209 | && (sec->flags & SEC_ALLOC) != 0 | |
1210 | && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 | |
1211 | && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL | |
1212 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32 | |
1213 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL | |
1214 | && ELF64_R_TYPE (rel->r_info) != R_390_PC64) | |
1215 | || (h != NULL | |
8c21ca21 | 1216 | && (! SYMBOLIC_BIND (info, h) |
0451c93c | 1217 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1218 | || !h->def_regular)))) |
64285810 MS |
1219 | || (ELIMINATE_COPY_RELOCS |
1220 | && !info->shared | |
0451c93c MS |
1221 | && (sec->flags & SEC_ALLOC) != 0 |
1222 | && h != NULL | |
1223 | && (h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1224 | || !h->def_regular))) |
a85d7ed0 | 1225 | { |
00d8c7a9 AK |
1226 | struct elf_dyn_relocs *p; |
1227 | struct elf_dyn_relocs **head; | |
ec338859 | 1228 | |
0451c93c MS |
1229 | /* We must copy these reloc types into the output file. |
1230 | Create a reloc section in dynobj and make room for | |
1231 | this reloc. */ | |
a85d7ed0 NC |
1232 | if (sreloc == NULL) |
1233 | { | |
440e9cd2 AK |
1234 | if (htab->elf.dynobj == NULL) |
1235 | htab->elf.dynobj = abfd; | |
1236 | ||
83bac4b0 NC |
1237 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1238 | (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); | |
ec338859 | 1239 | |
a85d7ed0 | 1240 | if (sreloc == NULL) |
83bac4b0 | 1241 | return FALSE; |
a85d7ed0 | 1242 | } |
ec338859 | 1243 | |
0451c93c MS |
1244 | /* If this is a global symbol, we count the number of |
1245 | relocations we need for this symbol. */ | |
1246 | if (h != NULL) | |
a85d7ed0 | 1247 | { |
ec338859 | 1248 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1249 | } |
1250 | else | |
1251 | { | |
ec338859 AM |
1252 | /* Track dynamic relocs needed for local syms too. |
1253 | We really need local syms available to do this | |
1254 | easily. Oh well. */ | |
ec338859 | 1255 | asection *s; |
6edfbbad | 1256 | void *vpp; |
87d72d41 | 1257 | Elf_Internal_Sym *isym; |
6edfbbad | 1258 | |
87d72d41 AM |
1259 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1260 | abfd, r_symndx); | |
1261 | if (isym == NULL) | |
b34976b6 | 1262 | return FALSE; |
ec338859 | 1263 | |
87d72d41 AM |
1264 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
1265 | if (s == NULL) | |
1266 | s = sec; | |
1267 | ||
6edfbbad | 1268 | vpp = &elf_section_data (s)->local_dynrel; |
00d8c7a9 | 1269 | head = (struct elf_dyn_relocs **) vpp; |
ec338859 AM |
1270 | } |
1271 | ||
1272 | p = *head; | |
1273 | if (p == NULL || p->sec != sec) | |
1274 | { | |
1275 | bfd_size_type amt = sizeof *p; | |
00d8c7a9 | 1276 | p = ((struct elf_dyn_relocs *) |
ec338859 AM |
1277 | bfd_alloc (htab->elf.dynobj, amt)); |
1278 | if (p == NULL) | |
b34976b6 | 1279 | return FALSE; |
ec338859 AM |
1280 | p->next = *head; |
1281 | *head = p; | |
1282 | p->sec = sec; | |
1283 | p->count = 0; | |
1284 | p->pc_count = 0; | |
a85d7ed0 | 1285 | } |
ec338859 AM |
1286 | |
1287 | p->count += 1; | |
1288 | if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 | |
1289 | || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL | |
1290 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32 | |
1291 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL | |
1292 | || ELF64_R_TYPE (rel->r_info) == R_390_PC64) | |
1293 | p->pc_count += 1; | |
a85d7ed0 | 1294 | } |
a85d7ed0 | 1295 | break; |
ec338859 | 1296 | |
a85d7ed0 NC |
1297 | /* This relocation describes the C++ object vtable hierarchy. |
1298 | Reconstruct it for later use during GC. */ | |
947216bf | 1299 | case R_390_GNU_VTINHERIT: |
c152c796 | 1300 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1301 | return FALSE; |
947216bf | 1302 | break; |
ec338859 | 1303 | |
a85d7ed0 NC |
1304 | /* This relocation describes which C++ vtable entries are actually |
1305 | used. Record for later use during GC. */ | |
947216bf | 1306 | case R_390_GNU_VTENTRY: |
d17e0c6e JB |
1307 | BFD_ASSERT (h != NULL); |
1308 | if (h != NULL | |
1309 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 1310 | return FALSE; |
947216bf | 1311 | break; |
ec338859 | 1312 | |
a85d7ed0 NC |
1313 | default: |
1314 | break; | |
1315 | } | |
1316 | } | |
1317 | ||
b34976b6 | 1318 | return TRUE; |
a85d7ed0 NC |
1319 | } |
1320 | ||
1321 | /* Return the section that should be marked against GC for a given | |
1322 | relocation. */ | |
1323 | ||
1324 | static asection * | |
07adf181 AM |
1325 | elf_s390_gc_mark_hook (asection *sec, |
1326 | struct bfd_link_info *info, | |
1327 | Elf_Internal_Rela *rel, | |
1328 | struct elf_link_hash_entry *h, | |
1329 | Elf_Internal_Sym *sym) | |
a85d7ed0 NC |
1330 | { |
1331 | if (h != NULL) | |
07adf181 AM |
1332 | switch (ELF64_R_TYPE (rel->r_info)) |
1333 | { | |
1334 | case R_390_GNU_VTINHERIT: | |
1335 | case R_390_GNU_VTENTRY: | |
1336 | return NULL; | |
1337 | } | |
1338 | ||
1339 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
a85d7ed0 NC |
1340 | } |
1341 | ||
1342 | /* Update the got entry reference counts for the section being removed. */ | |
1343 | ||
b34976b6 | 1344 | static bfd_boolean |
07adf181 AM |
1345 | elf_s390_gc_sweep_hook (bfd *abfd, |
1346 | struct bfd_link_info *info, | |
1347 | asection *sec, | |
1348 | const Elf_Internal_Rela *relocs) | |
a85d7ed0 | 1349 | { |
4dfe6ac6 | 1350 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1351 | Elf_Internal_Shdr *symtab_hdr; |
1352 | struct elf_link_hash_entry **sym_hashes; | |
1353 | bfd_signed_vma *local_got_refcounts; | |
1354 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1355 | |
7dda2462 TG |
1356 | if (info->relocatable) |
1357 | return TRUE; | |
1358 | ||
4dfe6ac6 NC |
1359 | htab = elf_s390_hash_table (info); |
1360 | if (htab == NULL) | |
1361 | return FALSE; | |
1362 | ||
ec338859 | 1363 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1364 | |
0ffa91dd | 1365 | symtab_hdr = &elf_symtab_hdr (abfd); |
0451c93c MS |
1366 | sym_hashes = elf_sym_hashes (abfd); |
1367 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1368 | |
1369 | relend = relocs + sec->reloc_count; | |
1370 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1371 | { |
26e41594 AM |
1372 | unsigned long r_symndx; |
1373 | unsigned int r_type; | |
1374 | struct elf_link_hash_entry *h = NULL; | |
1375 | ||
5236c819 | 1376 | r_symndx = ELF64_R_SYM (rel->r_info); |
26e41594 AM |
1377 | if (r_symndx >= symtab_hdr->sh_info) |
1378 | { | |
1379 | struct elf_s390_link_hash_entry *eh; | |
00d8c7a9 AK |
1380 | struct elf_dyn_relocs **pp; |
1381 | struct elf_dyn_relocs *p; | |
5236c819 | 1382 | |
26e41594 | 1383 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1384 | while (h->root.type == bfd_link_hash_indirect |
1385 | || h->root.type == bfd_link_hash_warning) | |
1386 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1387 | eh = (struct elf_s390_link_hash_entry *) h; |
5236c819 | 1388 | |
26e41594 AM |
1389 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1390 | if (p->sec == sec) | |
1391 | { | |
1392 | /* Everything must go for SEC. */ | |
1393 | *pp = p->next; | |
1394 | break; | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | r_type = ELF64_R_TYPE (rel->r_info); | |
1399 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1400 | switch (r_type) |
5236c819 | 1401 | { |
69fc87f1 | 1402 | case R_390_TLS_LDM64: |
4dfe6ac6 NC |
1403 | if (htab->tls_ldm_got.refcount > 0) |
1404 | htab->tls_ldm_got.refcount -= 1; | |
69fc87f1 MS |
1405 | break; |
1406 | ||
1407 | case R_390_TLS_GD64: | |
1408 | case R_390_TLS_IE64: | |
1409 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1410 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1411 | case R_390_TLS_GOTIE64: |
1412 | case R_390_TLS_IEENT: | |
5236c819 MS |
1413 | case R_390_GOT12: |
1414 | case R_390_GOT16: | |
bd1ea41b | 1415 | case R_390_GOT20: |
5236c819 MS |
1416 | case R_390_GOT32: |
1417 | case R_390_GOT64: | |
1418 | case R_390_GOTOFF16: | |
1419 | case R_390_GOTOFF32: | |
1420 | case R_390_GOTOFF64: | |
1421 | case R_390_GOTPC: | |
1422 | case R_390_GOTPCDBL: | |
1423 | case R_390_GOTENT: | |
1424 | if (h != NULL) | |
1425 | { | |
1426 | if (h->got.refcount > 0) | |
1427 | h->got.refcount -= 1; | |
1428 | } | |
1429 | else if (local_got_refcounts != NULL) | |
1430 | { | |
1431 | if (local_got_refcounts[r_symndx] > 0) | |
1432 | local_got_refcounts[r_symndx] -= 1; | |
1433 | } | |
26e41594 | 1434 | break; |
a85d7ed0 | 1435 | |
5236c819 MS |
1436 | case R_390_8: |
1437 | case R_390_12: | |
1438 | case R_390_16: | |
bd1ea41b | 1439 | case R_390_20: |
5236c819 MS |
1440 | case R_390_32: |
1441 | case R_390_64: | |
1442 | case R_390_PC16: | |
1443 | case R_390_PC16DBL: | |
1444 | case R_390_PC32: | |
1445 | case R_390_PC32DBL: | |
1446 | case R_390_PC64: | |
26e41594 AM |
1447 | if (info->shared) |
1448 | break; | |
1449 | /* Fall through */ | |
a85d7ed0 | 1450 | |
69fc87f1 MS |
1451 | case R_390_PLT16DBL: |
1452 | case R_390_PLT32: | |
1453 | case R_390_PLT32DBL: | |
1454 | case R_390_PLT64: | |
1455 | case R_390_PLTOFF16: | |
1456 | case R_390_PLTOFF32: | |
1457 | case R_390_PLTOFF64: | |
1458 | if (h != NULL) | |
1459 | { | |
1460 | if (h->plt.refcount > 0) | |
1461 | h->plt.refcount -= 1; | |
1462 | } | |
1463 | break; | |
1464 | ||
1465 | case R_390_GOTPLT12: | |
1466 | case R_390_GOTPLT16: | |
bd1ea41b | 1467 | case R_390_GOTPLT20: |
69fc87f1 MS |
1468 | case R_390_GOTPLT32: |
1469 | case R_390_GOTPLT64: | |
1470 | case R_390_GOTPLTENT: | |
1471 | if (h != NULL) | |
1472 | { | |
1473 | if (h->plt.refcount > 0) | |
1474 | { | |
1475 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1476 | h->plt.refcount -= 1; | |
1477 | } | |
1478 | } | |
1479 | else if (local_got_refcounts != NULL) | |
1480 | { | |
1481 | if (local_got_refcounts[r_symndx] > 0) | |
1482 | local_got_refcounts[r_symndx] -= 1; | |
1483 | } | |
1484 | break; | |
1485 | ||
5236c819 MS |
1486 | default: |
1487 | break; | |
1488 | } | |
1489 | } | |
a85d7ed0 | 1490 | |
b34976b6 | 1491 | return TRUE; |
a85d7ed0 NC |
1492 | } |
1493 | ||
5236c819 MS |
1494 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1495 | entry but we found we will not create any. Called when we find we will | |
1496 | not have any PLT for this symbol, by for example | |
1497 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1498 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1499 | created (we're only linking static objects). */ | |
1500 | ||
1501 | static void | |
1502 | elf_s390_adjust_gotplt (h) | |
1503 | struct elf_s390_link_hash_entry *h; | |
1504 | { | |
1505 | if (h->elf.root.type == bfd_link_hash_warning) | |
1506 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1507 | ||
1508 | if (h->gotplt_refcount <= 0) | |
1509 | return; | |
1510 | ||
1511 | /* We simply add the number of gotplt references to the number | |
1512 | * of got references for this symbol. */ | |
1513 | h->elf.got.refcount += h->gotplt_refcount; | |
1514 | h->gotplt_refcount = -1; | |
1515 | } | |
1516 | ||
a85d7ed0 NC |
1517 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1518 | regular object. The current definition is in some section of the | |
1519 | dynamic object, but we're not including those sections. We have to | |
1520 | change the definition to something the rest of the link can | |
1521 | understand. */ | |
1522 | ||
b34976b6 | 1523 | static bfd_boolean |
4dfe6ac6 NC |
1524 | elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, |
1525 | struct elf_link_hash_entry *h) | |
a85d7ed0 | 1526 | { |
0451c93c | 1527 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 | 1528 | asection *s; |
a85d7ed0 | 1529 | |
a85d7ed0 NC |
1530 | /* If this is a function, put it in the procedure linkage table. We |
1531 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1532 | (although we could actually do it here). */ |
a85d7ed0 | 1533 | if (h->type == STT_FUNC |
f5385ebf | 1534 | || h->needs_plt) |
a85d7ed0 | 1535 | { |
0451c93c | 1536 | if (h->plt.refcount <= 0 |
8c21ca21 AK |
1537 | || SYMBOL_CALLS_LOCAL (info, h) |
1538 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1539 | && h->root.type == bfd_link_hash_undefweak)) | |
a85d7ed0 NC |
1540 | { |
1541 | /* This case can occur if we saw a PLT32 reloc in an input | |
947216bf AM |
1542 | file, but the symbol was never referred to by a dynamic |
1543 | object, or if all references were garbage collected. In | |
0451c93c MS |
1544 | such a case, we don't actually need to build a procedure |
1545 | linkage table, and we can just do a PC32 reloc instead. */ | |
a85d7ed0 | 1546 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1547 | h->needs_plt = 0; |
5236c819 | 1548 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1549 | } |
1550 | ||
b34976b6 | 1551 | return TRUE; |
a85d7ed0 | 1552 | } |
bbd7ec4a | 1553 | else |
0451c93c MS |
1554 | /* It's possible that we incorrectly decided a .plt reloc was |
1555 | needed for an R_390_PC32 reloc to a non-function sym in | |
1556 | check_relocs. We can't decide accurately between function and | |
1557 | non-function syms in check-relocs; Objects loaded later in | |
1558 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1559 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1560 | |
1561 | /* If this is a weak symbol, and there is a real definition, the | |
1562 | processor independent code will have arranged for us to see the | |
1563 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 1564 | if (h->u.weakdef != NULL) |
a85d7ed0 | 1565 | { |
f6e332e6 AM |
1566 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1567 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1568 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1569 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
64285810 | 1570 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1571 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1572 | return TRUE; |
a85d7ed0 NC |
1573 | } |
1574 | ||
1575 | /* This is a reference to a symbol defined by a dynamic object which | |
1576 | is not a function. */ | |
1577 | ||
1578 | /* If we are creating a shared library, we must presume that the | |
1579 | only references to the symbol are via the global offset table. | |
1580 | For such cases we need not do anything here; the relocations will | |
1581 | be handled correctly by relocate_section. */ | |
1582 | if (info->shared) | |
b34976b6 | 1583 | return TRUE; |
a85d7ed0 NC |
1584 | |
1585 | /* If there are no references to this symbol that do not use the | |
1586 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1587 | if (!h->non_got_ref) |
b34976b6 | 1588 | return TRUE; |
a85d7ed0 | 1589 | |
0451c93c MS |
1590 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1591 | if (info->nocopyreloc) | |
1592 | { | |
f5385ebf | 1593 | h->non_got_ref = 0; |
b34976b6 | 1594 | return TRUE; |
0451c93c MS |
1595 | } |
1596 | ||
64285810 | 1597 | if (ELIMINATE_COPY_RELOCS) |
0451c93c | 1598 | { |
64285810 | 1599 | struct elf_s390_link_hash_entry * eh; |
00d8c7a9 | 1600 | struct elf_dyn_relocs *p; |
0451c93c | 1601 | |
64285810 MS |
1602 | eh = (struct elf_s390_link_hash_entry *) h; |
1603 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1604 | { | |
1605 | s = p->sec->output_section; | |
1606 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1607 | break; | |
1608 | } | |
1609 | ||
1610 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1611 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1612 | if (p == NULL) | |
1613 | { | |
f5385ebf | 1614 | h->non_got_ref = 0; |
64285810 MS |
1615 | return TRUE; |
1616 | } | |
0451c93c MS |
1617 | } |
1618 | ||
a85d7ed0 NC |
1619 | /* We must allocate the symbol in our .dynbss section, which will |
1620 | become part of the .bss section of the executable. There will be | |
1621 | an entry for this symbol in the .dynsym section. The dynamic | |
1622 | object will contain position independent code, so all references | |
1623 | from the dynamic object to this symbol will go through the global | |
1624 | offset table. The dynamic linker will use the .dynsym entry to | |
1625 | determine the address it must put in the global offset table, so | |
1626 | both the dynamic object and the regular object will refer to the | |
1627 | same memory location for the variable. */ | |
1628 | ||
0451c93c | 1629 | htab = elf_s390_hash_table (info); |
4dfe6ac6 NC |
1630 | if (htab == NULL) |
1631 | return FALSE; | |
a85d7ed0 | 1632 | |
0451c93c MS |
1633 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1634 | copy the initial value out of the dynamic object and into the | |
1635 | runtime process image. */ | |
1d7e9d18 | 1636 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
a85d7ed0 | 1637 | { |
eea6121a | 1638 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1639 | h->needs_copy = 1; |
a85d7ed0 NC |
1640 | } |
1641 | ||
0451c93c | 1642 | s = htab->sdynbss; |
a85d7ed0 | 1643 | |
027297b7 | 1644 | return _bfd_elf_adjust_dynamic_copy (h, s); |
a85d7ed0 NC |
1645 | } |
1646 | ||
0451c93c MS |
1647 | /* Allocate space in .plt, .got and associated reloc sections for |
1648 | dynamic relocs. */ | |
1649 | ||
b34976b6 | 1650 | static bfd_boolean |
4dfe6ac6 NC |
1651 | allocate_dynrelocs (struct elf_link_hash_entry *h, |
1652 | void * inf) | |
0451c93c MS |
1653 | { |
1654 | struct bfd_link_info *info; | |
1655 | struct elf_s390_link_hash_table *htab; | |
1656 | struct elf_s390_link_hash_entry *eh; | |
00d8c7a9 | 1657 | struct elf_dyn_relocs *p; |
0451c93c | 1658 | |
e92d460e | 1659 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1660 | return TRUE; |
0451c93c MS |
1661 | |
1662 | info = (struct bfd_link_info *) inf; | |
1663 | htab = elf_s390_hash_table (info); | |
4dfe6ac6 NC |
1664 | if (htab == NULL) |
1665 | return FALSE; | |
0451c93c MS |
1666 | |
1667 | if (htab->elf.dynamic_sections_created | |
8c21ca21 | 1668 | && h->plt.refcount > 0) |
0451c93c MS |
1669 | { |
1670 | /* Make sure this symbol is output as a dynamic symbol. | |
1671 | Undefined weak syms won't yet be marked as dynamic. */ | |
1672 | if (h->dynindx == -1 | |
f5385ebf | 1673 | && !h->forced_local) |
0451c93c | 1674 | { |
c152c796 | 1675 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1676 | return FALSE; |
0451c93c MS |
1677 | } |
1678 | ||
82058a73 | 1679 | if (info->shared |
4ec72bde | 1680 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
0451c93c MS |
1681 | { |
1682 | asection *s = htab->splt; | |
1683 | ||
1684 | /* If this is the first .plt entry, make room for the special | |
1685 | first entry. */ | |
eea6121a AM |
1686 | if (s->size == 0) |
1687 | s->size += PLT_FIRST_ENTRY_SIZE; | |
0451c93c | 1688 | |
eea6121a | 1689 | h->plt.offset = s->size; |
0451c93c MS |
1690 | |
1691 | /* If this symbol is not defined in a regular file, and we are | |
1692 | not generating a shared library, then set the symbol to this | |
1693 | location in the .plt. This is required to make function | |
1694 | pointers compare as equal between the normal executable and | |
1695 | the shared library. */ | |
1696 | if (! info->shared | |
f5385ebf | 1697 | && !h->def_regular) |
0451c93c MS |
1698 | { |
1699 | h->root.u.def.section = s; | |
1700 | h->root.u.def.value = h->plt.offset; | |
1701 | } | |
ec338859 | 1702 | |
0451c93c | 1703 | /* Make room for this entry. */ |
eea6121a | 1704 | s->size += PLT_ENTRY_SIZE; |
ec338859 | 1705 | |
0451c93c MS |
1706 | /* We also need to make an entry in the .got.plt section, which |
1707 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1708 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
0451c93c MS |
1709 | |
1710 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1711 | htab->srelplt->size += sizeof (Elf64_External_Rela); |
0451c93c MS |
1712 | } |
1713 | else | |
1714 | { | |
1715 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1716 | h->needs_plt = 0; |
5236c819 | 1717 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1718 | } |
1719 | } | |
1720 | else | |
1721 | { | |
1722 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1723 | h->needs_plt = 0; |
5236c819 | 1724 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1725 | } |
1726 | ||
69fc87f1 MS |
1727 | /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to |
1728 | the binary, we can optimize a bit. IE64 and GOTIE64 get converted | |
1729 | to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT | |
1730 | we can save the dynamic TLS relocation. */ | |
1731 | if (h->got.refcount > 0 | |
1732 | && !info->shared | |
1733 | && h->dynindx == -1 | |
1734 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
1735 | { | |
1736 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) | |
1737 | /* For the GOTIE access without a literal pool entry the offset has | |
1738 | to be stored somewhere. The immediate value in the instruction | |
1739 | is not bit enough so the value is stored in the got. */ | |
1740 | { | |
eea6121a AM |
1741 | h->got.offset = htab->sgot->size; |
1742 | htab->sgot->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1743 | } |
1744 | else | |
1745 | h->got.offset = (bfd_vma) -1; | |
1746 | } | |
1747 | else if (h->got.refcount > 0) | |
0451c93c MS |
1748 | { |
1749 | asection *s; | |
b34976b6 | 1750 | bfd_boolean dyn; |
69fc87f1 | 1751 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1752 | |
1753 | /* Make sure this symbol is output as a dynamic symbol. | |
1754 | Undefined weak syms won't yet be marked as dynamic. */ | |
1755 | if (h->dynindx == -1 | |
f5385ebf | 1756 | && !h->forced_local) |
0451c93c | 1757 | { |
c152c796 | 1758 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1759 | return FALSE; |
0451c93c MS |
1760 | } |
1761 | ||
1762 | s = htab->sgot; | |
eea6121a AM |
1763 | h->got.offset = s->size; |
1764 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1765 | /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ |
1766 | if (tls_type == GOT_TLS_GD) | |
eea6121a | 1767 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 1768 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1769 | /* R_390_TLS_IE64 needs one dynamic relocation, |
1770 | R_390_TLS_GD64 needs one if local symbol and two if global. */ | |
1771 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1772 | || tls_type >= GOT_TLS_IE) | |
eea6121a | 1773 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
69fc87f1 | 1774 | else if (tls_type == GOT_TLS_GD) |
eea6121a | 1775 | htab->srelgot->size += 2 * sizeof (Elf64_External_Rela); |
82058a73 MS |
1776 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1777 | || h->root.type != bfd_link_hash_undefweak) | |
1778 | && (info->shared | |
1779 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1780 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
0451c93c MS |
1781 | } |
1782 | else | |
1783 | h->got.offset = (bfd_vma) -1; | |
1784 | ||
1785 | eh = (struct elf_s390_link_hash_entry *) h; | |
1786 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1787 | return TRUE; |
0451c93c MS |
1788 | |
1789 | /* In the shared -Bsymbolic case, discard space allocated for | |
1790 | dynamic pc-relative relocs against symbols which turn out to be | |
1791 | defined in regular objects. For the normal shared case, discard | |
1792 | space for pc-relative relocs that have become local due to symbol | |
1793 | visibility changes. */ | |
1794 | ||
1795 | if (info->shared) | |
1796 | { | |
8c21ca21 | 1797 | if (SYMBOL_CALLS_LOCAL (info, h)) |
0451c93c | 1798 | { |
00d8c7a9 | 1799 | struct elf_dyn_relocs **pp; |
0451c93c MS |
1800 | |
1801 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1802 | { | |
1803 | p->count -= p->pc_count; | |
1804 | p->pc_count = 0; | |
1805 | if (p->count == 0) | |
1806 | *pp = p->next; | |
1807 | else | |
1808 | pp = &p->next; | |
1809 | } | |
1810 | } | |
82058a73 MS |
1811 | |
1812 | /* Also discard relocs on undefined weak syms with non-default | |
1813 | visibility. */ | |
22d606e9 | 1814 | if (eh->dyn_relocs != NULL |
82058a73 | 1815 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
1816 | { |
1817 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
1818 | eh->dyn_relocs = NULL; | |
1819 | ||
1820 | /* Make sure undefined weak symbols are output as a dynamic | |
1821 | symbol in PIEs. */ | |
1822 | else if (h->dynindx == -1 | |
1823 | && !h->forced_local) | |
1824 | { | |
1825 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1826 | return FALSE; | |
1827 | } | |
1828 | } | |
0451c93c | 1829 | } |
64285810 | 1830 | else if (ELIMINATE_COPY_RELOCS) |
0451c93c MS |
1831 | { |
1832 | /* For the non-shared case, discard space for relocs against | |
1833 | symbols which turn out to need copy relocs or are not | |
1834 | dynamic. */ | |
1835 | ||
f5385ebf AM |
1836 | if (!h->non_got_ref |
1837 | && ((h->def_dynamic | |
1838 | && !h->def_regular) | |
0451c93c MS |
1839 | || (htab->elf.dynamic_sections_created |
1840 | && (h->root.type == bfd_link_hash_undefweak | |
1841 | || h->root.type == bfd_link_hash_undefined)))) | |
1842 | { | |
1843 | /* Make sure this symbol is output as a dynamic symbol. | |
1844 | Undefined weak syms won't yet be marked as dynamic. */ | |
1845 | if (h->dynindx == -1 | |
f5385ebf | 1846 | && !h->forced_local) |
0451c93c | 1847 | { |
c152c796 | 1848 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1849 | return FALSE; |
0451c93c MS |
1850 | } |
1851 | ||
1852 | /* If that succeeded, we know we'll be keeping all the | |
1853 | relocs. */ | |
1854 | if (h->dynindx != -1) | |
1855 | goto keep; | |
1856 | } | |
1857 | ||
1858 | eh->dyn_relocs = NULL; | |
1859 | ||
ec338859 | 1860 | keep: ; |
0451c93c MS |
1861 | } |
1862 | ||
1863 | /* Finally, allocate space. */ | |
1864 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1865 | { | |
1866 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1867 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
0451c93c MS |
1868 | } |
1869 | ||
b34976b6 | 1870 | return TRUE; |
0451c93c MS |
1871 | } |
1872 | ||
1873 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1874 | ||
b34976b6 | 1875 | static bfd_boolean |
0451c93c MS |
1876 | readonly_dynrelocs (h, inf) |
1877 | struct elf_link_hash_entry *h; | |
1878 | PTR inf; | |
1879 | { | |
1880 | struct elf_s390_link_hash_entry *eh; | |
00d8c7a9 | 1881 | struct elf_dyn_relocs *p; |
0451c93c MS |
1882 | |
1883 | eh = (struct elf_s390_link_hash_entry *) h; | |
1884 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1885 | { | |
1886 | asection *s = p->sec->output_section; | |
1887 | ||
1888 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1889 | { | |
1890 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1891 | ||
1892 | info->flags |= DF_TEXTREL; | |
1893 | ||
1894 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1895 | return FALSE; |
0451c93c MS |
1896 | } |
1897 | } | |
b34976b6 | 1898 | return TRUE; |
0451c93c MS |
1899 | } |
1900 | ||
a85d7ed0 NC |
1901 | /* Set the sizes of the dynamic sections. */ |
1902 | ||
b34976b6 | 1903 | static bfd_boolean |
4dfe6ac6 NC |
1904 | elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1905 | struct bfd_link_info *info) | |
a85d7ed0 | 1906 | { |
0451c93c | 1907 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1908 | bfd *dynobj; |
1909 | asection *s; | |
b34976b6 | 1910 | bfd_boolean relocs; |
0451c93c | 1911 | bfd *ibfd; |
a85d7ed0 | 1912 | |
0451c93c | 1913 | htab = elf_s390_hash_table (info); |
4dfe6ac6 NC |
1914 | if (htab == NULL) |
1915 | return FALSE; | |
1916 | ||
0451c93c MS |
1917 | dynobj = htab->elf.dynobj; |
1918 | if (dynobj == NULL) | |
1919 | abort (); | |
a85d7ed0 | 1920 | |
0451c93c | 1921 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1922 | { |
1923 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1924 | if (info->executable) |
a85d7ed0 NC |
1925 | { |
1926 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1927 | if (s == NULL) |
1928 | abort (); | |
eea6121a | 1929 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
a85d7ed0 NC |
1930 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1931 | } | |
1932 | } | |
a85d7ed0 | 1933 | |
0451c93c MS |
1934 | /* Set up .got offsets for local syms, and space for local dynamic |
1935 | relocs. */ | |
1936 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 1937 | { |
0451c93c MS |
1938 | bfd_signed_vma *local_got; |
1939 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 1940 | char *local_tls_type; |
0451c93c MS |
1941 | bfd_size_type locsymcount; |
1942 | Elf_Internal_Shdr *symtab_hdr; | |
1943 | asection *srela; | |
a85d7ed0 | 1944 | |
0ffa91dd | 1945 | if (! is_s390_elf (ibfd)) |
a85d7ed0 NC |
1946 | continue; |
1947 | ||
0451c93c | 1948 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 1949 | { |
00d8c7a9 | 1950 | struct elf_dyn_relocs *p; |
0451c93c | 1951 | |
6edfbbad | 1952 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
a85d7ed0 | 1953 | { |
ec338859 AM |
1954 | if (!bfd_is_abs_section (p->sec) |
1955 | && bfd_is_abs_section (p->sec->output_section)) | |
1956 | { | |
1957 | /* Input section has been discarded, either because | |
1958 | it is a copy of a linkonce section or due to | |
1959 | linker script /DISCARD/, so we'll be discarding | |
1960 | the relocs too. */ | |
1961 | } | |
248866a8 | 1962 | else if (p->count != 0) |
ec338859 AM |
1963 | { |
1964 | srela = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1965 | srela->size += p->count * sizeof (Elf64_External_Rela); |
248866a8 AM |
1966 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1967 | info->flags |= DF_TEXTREL; | |
ec338859 | 1968 | } |
a85d7ed0 NC |
1969 | } |
1970 | } | |
0451c93c MS |
1971 | |
1972 | local_got = elf_local_got_refcounts (ibfd); | |
1973 | if (!local_got) | |
1974 | continue; | |
1975 | ||
0ffa91dd | 1976 | symtab_hdr = &elf_symtab_hdr (ibfd); |
0451c93c MS |
1977 | locsymcount = symtab_hdr->sh_info; |
1978 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 1979 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
1980 | s = htab->sgot; |
1981 | srela = htab->srelgot; | |
69fc87f1 | 1982 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 1983 | { |
0451c93c | 1984 | if (*local_got > 0) |
a85d7ed0 | 1985 | { |
eea6121a AM |
1986 | *local_got = s->size; |
1987 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 | 1988 | if (*local_tls_type == GOT_TLS_GD) |
eea6121a | 1989 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 1990 | if (info->shared) |
eea6121a | 1991 | srela->size += sizeof (Elf64_External_Rela); |
a85d7ed0 NC |
1992 | } |
1993 | else | |
0451c93c | 1994 | *local_got = (bfd_vma) -1; |
a85d7ed0 | 1995 | } |
0451c93c MS |
1996 | } |
1997 | ||
69fc87f1 MS |
1998 | if (htab->tls_ldm_got.refcount > 0) |
1999 | { | |
2000 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 | |
2001 | relocs. */ | |
eea6121a AM |
2002 | htab->tls_ldm_got.offset = htab->sgot->size; |
2003 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
2004 | htab->srelgot->size += sizeof (Elf64_External_Rela); | |
69fc87f1 MS |
2005 | } |
2006 | else | |
2007 | htab->tls_ldm_got.offset = -1; | |
2008 | ||
0451c93c MS |
2009 | /* Allocate global sym .plt and .got entries, and space for global |
2010 | sym dynamic relocs. */ | |
2011 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2012 | ||
2013 | /* We now have determined the sizes of the various dynamic sections. | |
2014 | Allocate memory for them. */ | |
b34976b6 | 2015 | relocs = FALSE; |
0451c93c MS |
2016 | for (s = dynobj->sections; s != NULL; s = s->next) |
2017 | { | |
2018 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2019 | continue; | |
2020 | ||
2021 | if (s == htab->splt | |
2022 | || s == htab->sgot | |
c456f082 AM |
2023 | || s == htab->sgotplt |
2024 | || s == htab->sdynbss) | |
0451c93c MS |
2025 | { |
2026 | /* Strip this section if we don't need it; see the | |
2027 | comment below. */ | |
2028 | } | |
0112cd26 | 2029 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
0451c93c | 2030 | { |
eea6121a | 2031 | if (s->size != 0 && s != htab->srelplt) |
b34976b6 | 2032 | relocs = TRUE; |
ec338859 | 2033 | |
0451c93c MS |
2034 | /* We use the reloc_count field as a counter if we need |
2035 | to copy relocs into the output file. */ | |
2036 | s->reloc_count = 0; | |
2037 | } | |
2038 | else | |
a85d7ed0 NC |
2039 | { |
2040 | /* It's not one of our sections, so don't allocate space. */ | |
2041 | continue; | |
2042 | } | |
2043 | ||
eea6121a | 2044 | if (s->size == 0) |
a85d7ed0 | 2045 | { |
0451c93c MS |
2046 | /* If we don't need this section, strip it from the |
2047 | output file. This is to handle .rela.bss and | |
2048 | .rela.plt. We must create it in | |
2049 | create_dynamic_sections, because it must be created | |
2050 | before the linker maps input sections to output | |
2051 | sections. The linker does that before | |
2052 | adjust_dynamic_symbol is called, and it is that | |
2053 | function which decides whether anything needs to go | |
2054 | into these sections. */ | |
2055 | ||
8423293d | 2056 | s->flags |= SEC_EXCLUDE; |
a85d7ed0 NC |
2057 | continue; |
2058 | } | |
2059 | ||
c456f082 AM |
2060 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2061 | continue; | |
2062 | ||
0451c93c MS |
2063 | /* Allocate memory for the section contents. We use bfd_zalloc |
2064 | here in case unused entries are not reclaimed before the | |
2065 | section's contents are written out. This should not happen, | |
2066 | but this way if it does, we get a R_390_NONE reloc instead | |
2067 | of garbage. */ | |
eea6121a | 2068 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
0451c93c | 2069 | if (s->contents == NULL) |
b34976b6 | 2070 | return FALSE; |
a85d7ed0 NC |
2071 | } |
2072 | ||
0451c93c | 2073 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2074 | { |
2075 | /* Add some entries to the .dynamic section. We fill in the | |
2076 | values later, in elf_s390_finish_dynamic_sections, but we | |
2077 | must add the entries now so that we get the correct size for | |
2078 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2079 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2080 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2081 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2082 | |
36af4a4e | 2083 | if (info->executable) |
a85d7ed0 | 2084 | { |
dc810e39 | 2085 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2086 | return FALSE; |
a85d7ed0 NC |
2087 | } |
2088 | ||
eea6121a | 2089 | if (htab->splt->size != 0) |
a85d7ed0 | 2090 | { |
dc810e39 AM |
2091 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2092 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2093 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2094 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2095 | return FALSE; |
a85d7ed0 NC |
2096 | } |
2097 | ||
2098 | if (relocs) | |
947216bf AM |
2099 | { |
2100 | if (!add_dynamic_entry (DT_RELA, 0) | |
2101 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2102 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2103 | return FALSE; |
ec338859 | 2104 | |
0451c93c MS |
2105 | /* If any dynamic relocs apply to a read-only section, |
2106 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2107 | if ((info->flags & DF_TEXTREL) == 0) |
2108 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2109 | (PTR) info); | |
ec338859 | 2110 | |
0451c93c MS |
2111 | if ((info->flags & DF_TEXTREL) != 0) |
2112 | { | |
2113 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2114 | return FALSE; |
0451c93c | 2115 | } |
a85d7ed0 NC |
2116 | } |
2117 | } | |
dc810e39 | 2118 | #undef add_dynamic_entry |
a85d7ed0 | 2119 | |
b34976b6 | 2120 | return TRUE; |
a85d7ed0 NC |
2121 | } |
2122 | ||
69fc87f1 MS |
2123 | /* Return the base VMA address which should be subtracted from real addresses |
2124 | when resolving @dtpoff relocation. | |
2125 | This is PT_TLS segment p_vaddr. */ | |
2126 | ||
2127 | static bfd_vma | |
2128 | dtpoff_base (info) | |
2129 | struct bfd_link_info *info; | |
2130 | { | |
e1918d23 AM |
2131 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2132 | if (elf_hash_table (info)->tls_sec == NULL) | |
69fc87f1 | 2133 | return 0; |
e1918d23 | 2134 | return elf_hash_table (info)->tls_sec->vma; |
69fc87f1 MS |
2135 | } |
2136 | ||
2137 | /* Return the relocation value for @tpoff relocation | |
2138 | if STT_TLS virtual address is ADDRESS. */ | |
2139 | ||
2140 | static bfd_vma | |
2141 | tpoff (info, address) | |
2142 | struct bfd_link_info *info; | |
2143 | bfd_vma address; | |
2144 | { | |
e1918d23 | 2145 | struct elf_link_hash_table *htab = elf_hash_table (info); |
69fc87f1 | 2146 | |
e1918d23 AM |
2147 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2148 | if (htab->tls_sec == NULL) | |
69fc87f1 | 2149 | return 0; |
e1918d23 | 2150 | return htab->tls_size + htab->tls_sec->vma - address; |
69fc87f1 MS |
2151 | } |
2152 | ||
2153 | /* Complain if TLS instruction relocation is against an invalid | |
2154 | instruction. */ | |
2155 | ||
2156 | static void | |
2157 | invalid_tls_insn (input_bfd, input_section, rel) | |
2158 | bfd *input_bfd; | |
2159 | asection *input_section; | |
2160 | Elf_Internal_Rela *rel; | |
2161 | { | |
2162 | reloc_howto_type *howto; | |
2163 | ||
2164 | howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); | |
2165 | (*_bfd_error_handler) | |
d003868e AM |
2166 | (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), |
2167 | input_bfd, | |
2168 | input_section, | |
69fc87f1 MS |
2169 | (long) rel->r_offset, |
2170 | howto->name); | |
77df2968 | 2171 | bfd_set_error (bfd_error_bad_value); |
69fc87f1 MS |
2172 | } |
2173 | ||
a85d7ed0 NC |
2174 | /* Relocate a 390 ELF section. */ |
2175 | ||
b34976b6 | 2176 | static bfd_boolean |
4dfe6ac6 NC |
2177 | elf_s390_relocate_section (bfd *output_bfd, |
2178 | struct bfd_link_info *info, | |
2179 | bfd *input_bfd, | |
2180 | asection *input_section, | |
2181 | bfd_byte *contents, | |
2182 | Elf_Internal_Rela *relocs, | |
2183 | Elf_Internal_Sym *local_syms, | |
2184 | asection **local_sections) | |
a85d7ed0 | 2185 | { |
0451c93c | 2186 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2187 | Elf_Internal_Shdr *symtab_hdr; |
2188 | struct elf_link_hash_entry **sym_hashes; | |
2189 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2190 | Elf_Internal_Rela *rel; |
2191 | Elf_Internal_Rela *relend; | |
2192 | ||
0ffa91dd NC |
2193 | BFD_ASSERT (is_s390_elf (input_bfd)); |
2194 | ||
0451c93c | 2195 | htab = elf_s390_hash_table (info); |
4dfe6ac6 NC |
2196 | if (htab == NULL) |
2197 | return FALSE; | |
2198 | ||
0ffa91dd | 2199 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
a85d7ed0 NC |
2200 | sym_hashes = elf_sym_hashes (input_bfd); |
2201 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2202 | ||
a85d7ed0 NC |
2203 | rel = relocs; |
2204 | relend = relocs + input_section->reloc_count; | |
2205 | for (; rel < relend; rel++) | |
2206 | { | |
5236c819 | 2207 | unsigned int r_type; |
a85d7ed0 NC |
2208 | reloc_howto_type *howto; |
2209 | unsigned long r_symndx; | |
2210 | struct elf_link_hash_entry *h; | |
2211 | Elf_Internal_Sym *sym; | |
2212 | asection *sec; | |
0451c93c | 2213 | bfd_vma off; |
a85d7ed0 | 2214 | bfd_vma relocation; |
b34976b6 | 2215 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2216 | bfd_reloc_status_type r; |
69fc87f1 | 2217 | int tls_type; |
a85d7ed0 NC |
2218 | |
2219 | r_type = ELF64_R_TYPE (rel->r_info); | |
0451c93c | 2220 | if (r_type == (int) R_390_GNU_VTINHERIT |
947216bf AM |
2221 | || r_type == (int) R_390_GNU_VTENTRY) |
2222 | continue; | |
5236c819 | 2223 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2224 | { |
2225 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2226 | return FALSE; |
a85d7ed0 | 2227 | } |
a85d7ed0 | 2228 | |
b491616a | 2229 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2230 | r_symndx = ELF64_R_SYM (rel->r_info); |
5236c819 | 2231 | |
a85d7ed0 NC |
2232 | h = NULL; |
2233 | sym = NULL; | |
2234 | sec = NULL; | |
b34976b6 | 2235 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2236 | if (r_symndx < symtab_hdr->sh_info) |
2237 | { | |
2238 | sym = local_syms + r_symndx; | |
2239 | sec = local_sections[r_symndx]; | |
8517fae7 | 2240 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
a85d7ed0 NC |
2241 | } |
2242 | else | |
2243 | { | |
560e09e9 | 2244 | bfd_boolean warned ATTRIBUTE_UNUSED; |
0451c93c | 2245 | |
b2a8e766 AM |
2246 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2247 | r_symndx, symtab_hdr, sym_hashes, | |
2248 | h, sec, relocation, | |
2249 | unresolved_reloc, warned); | |
a85d7ed0 NC |
2250 | } |
2251 | ||
ab96bf03 | 2252 | if (sec != NULL && elf_discarded_section (sec)) |
e4067dbb DJ |
2253 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
2254 | rel, relend, howto, contents); | |
ab96bf03 AM |
2255 | |
2256 | if (info->relocatable) | |
2257 | continue; | |
2258 | ||
a85d7ed0 NC |
2259 | switch (r_type) |
2260 | { | |
5236c819 MS |
2261 | case R_390_GOTPLT12: |
2262 | case R_390_GOTPLT16: | |
bd1ea41b | 2263 | case R_390_GOTPLT20: |
5236c819 MS |
2264 | case R_390_GOTPLT32: |
2265 | case R_390_GOTPLT64: | |
2266 | case R_390_GOTPLTENT: | |
2267 | /* There are three cases for a GOTPLT relocation. 1) The | |
2268 | relocation is against the jump slot entry of a plt that | |
2269 | will get emitted to the output file. 2) The relocation | |
2270 | is against the jump slot of a plt entry that has been | |
2271 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2272 | as replacement. 3) The relocation is against a local symbol. | |
2273 | Cases 2) and 3) are the same as the GOT relocation code | |
2274 | so we just have to test for case 1 and fall through for | |
2275 | the other two. */ | |
2276 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2277 | { | |
2278 | bfd_vma plt_index; | |
2279 | ||
2280 | /* Calc. index no. | |
2281 | Current offset - size first entry / entry size. */ | |
2282 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2283 | PLT_ENTRY_SIZE; | |
26e41594 | 2284 | |
5236c819 MS |
2285 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2286 | addr & GOT addr. */ | |
2287 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2288 | unresolved_reloc = FALSE; | |
2289 | ||
2290 | if (r_type == R_390_GOTPLTENT) | |
26e41594 | 2291 | relocation += htab->sgot->output_section->vma; |
5236c819 MS |
2292 | break; |
2293 | } | |
2294 | /* Fall through. */ | |
2295 | ||
947216bf AM |
2296 | case R_390_GOT12: |
2297 | case R_390_GOT16: | |
bd1ea41b | 2298 | case R_390_GOT20: |
947216bf AM |
2299 | case R_390_GOT32: |
2300 | case R_390_GOT64: | |
2301 | case R_390_GOTENT: | |
2302 | /* Relocation is to the entry for this symbol in the global | |
2303 | offset table. */ | |
0451c93c MS |
2304 | if (htab->sgot == NULL) |
2305 | abort (); | |
a85d7ed0 | 2306 | |
947216bf AM |
2307 | if (h != NULL) |
2308 | { | |
b34976b6 | 2309 | bfd_boolean dyn; |
a85d7ed0 | 2310 | |
947216bf | 2311 | off = h->got.offset; |
0451c93c | 2312 | dyn = htab->elf.dynamic_sections_created; |
4ec72bde | 2313 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
947216bf | 2314 | || (info->shared |
8c21ca21 | 2315 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
82058a73 MS |
2316 | || (ELF_ST_VISIBILITY (h->other) |
2317 | && h->root.type == bfd_link_hash_undefweak)) | |
947216bf AM |
2318 | { |
2319 | /* This is actually a static link, or it is a | |
2320 | -Bsymbolic link and the symbol is defined | |
2321 | locally, or the symbol was forced to be local | |
2322 | because of a version file. We must initialize | |
2323 | this entry in the global offset table. Since the | |
2324 | offset must always be a multiple of 2, we use the | |
2325 | least significant bit to record whether we have | |
2326 | initialized it already. | |
2327 | ||
2328 | When doing a dynamic link, we create a .rel.got | |
2329 | relocation entry to initialize the value. This | |
2330 | is done in the finish_dynamic_symbol routine. */ | |
2331 | if ((off & 1) != 0) | |
2332 | off &= ~1; | |
2333 | else | |
2334 | { | |
a85d7ed0 | 2335 | bfd_put_64 (output_bfd, relocation, |
0451c93c | 2336 | htab->sgot->contents + off); |
947216bf AM |
2337 | h->got.offset |= 1; |
2338 | } | |
2339 | } | |
0451c93c | 2340 | else |
b34976b6 | 2341 | unresolved_reloc = FALSE; |
947216bf AM |
2342 | } |
2343 | else | |
2344 | { | |
0451c93c MS |
2345 | if (local_got_offsets == NULL) |
2346 | abort (); | |
a85d7ed0 | 2347 | |
947216bf | 2348 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2349 | |
947216bf AM |
2350 | /* The offset must always be a multiple of 8. We use |
2351 | the least significant bit to record whether we have | |
2352 | already generated the necessary reloc. */ | |
2353 | if ((off & 1) != 0) | |
2354 | off &= ~1; | |
2355 | else | |
2356 | { | |
2357 | bfd_put_64 (output_bfd, relocation, | |
0451c93c | 2358 | htab->sgot->contents + off); |
a85d7ed0 | 2359 | |
947216bf AM |
2360 | if (info->shared) |
2361 | { | |
2362 | asection *s; | |
2363 | Elf_Internal_Rela outrel; | |
2364 | bfd_byte *loc; | |
a85d7ed0 | 2365 | |
947216bf AM |
2366 | s = htab->srelgot; |
2367 | if (s == NULL) | |
0451c93c | 2368 | abort (); |
a85d7ed0 | 2369 | |
947216bf AM |
2370 | outrel.r_offset = (htab->sgot->output_section->vma |
2371 | + htab->sgot->output_offset | |
2372 | + off); | |
2373 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2374 | outrel.r_addend = relocation; |
947216bf AM |
2375 | loc = s->contents; |
2376 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
2377 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2378 | } | |
a85d7ed0 | 2379 | |
947216bf AM |
2380 | local_got_offsets[r_symndx] |= 1; |
2381 | } | |
2382 | } | |
a85d7ed0 | 2383 | |
0451c93c MS |
2384 | if (off >= (bfd_vma) -2) |
2385 | abort (); | |
2386 | ||
2387 | relocation = htab->sgot->output_offset + off; | |
2388 | ||
ae9a127f NC |
2389 | /* For @GOTENT the relocation is against the offset between |
2390 | the instruction and the symbols entry in the GOT and not | |
2391 | between the start of the GOT and the symbols entry. We | |
2392 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2393 | if ( r_type == R_390_GOTENT |
2394 | || r_type == R_390_GOTPLTENT) | |
0451c93c | 2395 | relocation += htab->sgot->output_section->vma; |
a85d7ed0 | 2396 | |
947216bf | 2397 | break; |
99c79b2e | 2398 | |
5236c819 MS |
2399 | case R_390_GOTOFF16: |
2400 | case R_390_GOTOFF32: | |
2401 | case R_390_GOTOFF64: | |
947216bf AM |
2402 | /* Relocation is relative to the start of the global offset |
2403 | table. */ | |
a85d7ed0 | 2404 | |
947216bf AM |
2405 | /* Note that sgot->output_offset is not involved in this |
2406 | calculation. We always want the start of .got. If we | |
2407 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2408 | permitted by the ABI, we might have to change this | |
2409 | calculation. */ | |
2410 | relocation -= htab->sgot->output_section->vma; | |
947216bf | 2411 | break; |
a85d7ed0 | 2412 | |
947216bf | 2413 | case R_390_GOTPC: |
a85d7ed0 | 2414 | case R_390_GOTPCDBL: |
947216bf AM |
2415 | /* Use global offset table as symbol value. */ |
2416 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2417 | unresolved_reloc = FALSE; |
947216bf | 2418 | break; |
a85d7ed0 | 2419 | |
947216bf AM |
2420 | case R_390_PLT16DBL: |
2421 | case R_390_PLT32: | |
2422 | case R_390_PLT32DBL: | |
2423 | case R_390_PLT64: | |
2424 | /* Relocation is to the entry for this symbol in the | |
2425 | procedure linkage table. */ | |
a85d7ed0 | 2426 | |
947216bf AM |
2427 | /* Resolve a PLT32 reloc against a local symbol directly, |
2428 | without using the procedure linkage table. */ | |
2429 | if (h == NULL) | |
2430 | break; | |
a85d7ed0 | 2431 | |
947216bf | 2432 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2433 | || htab->splt == NULL) |
947216bf AM |
2434 | { |
2435 | /* We didn't make a PLT entry for this symbol. This | |
2436 | happens when statically linking PIC code, or when | |
2437 | using -Bsymbolic. */ | |
2438 | break; | |
2439 | } | |
2440 | ||
2441 | relocation = (htab->splt->output_section->vma | |
2442 | + htab->splt->output_offset | |
2443 | + h->plt.offset); | |
b34976b6 | 2444 | unresolved_reloc = FALSE; |
26e41594 | 2445 | break; |
5236c819 MS |
2446 | |
2447 | case R_390_PLTOFF16: | |
2448 | case R_390_PLTOFF32: | |
2449 | case R_390_PLTOFF64: | |
26e41594 AM |
2450 | /* Relocation is to the entry for this symbol in the |
2451 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2452 | |
2453 | /* For local symbols or if we didn't make a PLT entry for | |
2454 | this symbol resolve the symbol directly. */ | |
26e41594 | 2455 | if ( h == NULL |
5236c819 MS |
2456 | || h->plt.offset == (bfd_vma) -1 |
2457 | || htab->splt == NULL) | |
2458 | { | |
2459 | relocation -= htab->sgot->output_section->vma; | |
2460 | break; | |
2461 | } | |
2462 | ||
26e41594 AM |
2463 | relocation = (htab->splt->output_section->vma |
2464 | + htab->splt->output_offset | |
2465 | + h->plt.offset | |
5236c819 MS |
2466 | - htab->sgot->output_section->vma); |
2467 | unresolved_reloc = FALSE; | |
947216bf AM |
2468 | break; |
2469 | ||
2470 | case R_390_8: | |
2471 | case R_390_16: | |
2472 | case R_390_32: | |
2473 | case R_390_64: | |
2474 | case R_390_PC16: | |
2475 | case R_390_PC16DBL: | |
2476 | case R_390_PC32: | |
a85d7ed0 | 2477 | case R_390_PC32DBL: |
947216bf | 2478 | case R_390_PC64: |
b1e24c02 | 2479 | if ((input_section->flags & SEC_ALLOC) == 0) |
ec338859 AM |
2480 | break; |
2481 | ||
947216bf | 2482 | if ((info->shared |
82058a73 MS |
2483 | && (h == NULL |
2484 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2485 | || h->root.type != bfd_link_hash_undefweak) | |
0451c93c MS |
2486 | && ((r_type != R_390_PC16 |
2487 | && r_type != R_390_PC16DBL | |
2488 | && r_type != R_390_PC32 | |
2489 | && r_type != R_390_PC32DBL | |
2490 | && r_type != R_390_PC64) | |
8c21ca21 | 2491 | || !SYMBOL_CALLS_LOCAL (info, h))) |
64285810 MS |
2492 | || (ELIMINATE_COPY_RELOCS |
2493 | && !info->shared | |
0451c93c MS |
2494 | && h != NULL |
2495 | && h->dynindx != -1 | |
f5385ebf AM |
2496 | && !h->non_got_ref |
2497 | && ((h->def_dynamic | |
2498 | && !h->def_regular) | |
0451c93c MS |
2499 | || h->root.type == bfd_link_hash_undefweak |
2500 | || h->root.type == bfd_link_hash_undefined))) | |
947216bf AM |
2501 | { |
2502 | Elf_Internal_Rela outrel; | |
b34976b6 | 2503 | bfd_boolean skip, relocate; |
0451c93c | 2504 | asection *sreloc; |
947216bf | 2505 | bfd_byte *loc; |
a85d7ed0 | 2506 | |
947216bf AM |
2507 | /* When generating a shared object, these relocations |
2508 | are copied into the output file to be resolved at run | |
2509 | time. */ | |
b34976b6 AM |
2510 | skip = FALSE; |
2511 | relocate = FALSE; | |
a85d7ed0 | 2512 | |
c629eae0 JJ |
2513 | outrel.r_offset = |
2514 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2515 | rel->r_offset); | |
2516 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2517 | skip = TRUE; |
0bb2d96a | 2518 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2519 | skip = TRUE, relocate = TRUE; |
a85d7ed0 | 2520 | |
947216bf AM |
2521 | outrel.r_offset += (input_section->output_section->vma |
2522 | + input_section->output_offset); | |
a85d7ed0 | 2523 | |
947216bf | 2524 | if (skip) |
0bb2d96a | 2525 | memset (&outrel, 0, sizeof outrel); |
947216bf | 2526 | else if (h != NULL |
0451c93c MS |
2527 | && h->dynindx != -1 |
2528 | && (r_type == R_390_PC16 | |
2529 | || r_type == R_390_PC16DBL | |
2530 | || r_type == R_390_PC32 | |
2531 | || r_type == R_390_PC32DBL | |
2532 | || r_type == R_390_PC64 | |
2533 | || !info->shared | |
8c21ca21 | 2534 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 2535 | || !h->def_regular)) |
947216bf AM |
2536 | { |
2537 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
27018c3f | 2538 | outrel.r_addend = rel->r_addend; |
947216bf AM |
2539 | } |
2540 | else | |
2541 | { | |
0451c93c | 2542 | /* This symbol is local, or marked to become local. */ |
90ced0dd | 2543 | outrel.r_addend = relocation + rel->r_addend; |
b5727d75 MS |
2544 | if (r_type == R_390_64) |
2545 | { | |
2546 | relocate = TRUE; | |
2547 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
b5727d75 MS |
2548 | } |
2549 | else | |
2550 | { | |
2551 | long sindx; | |
2552 | ||
90ced0dd | 2553 | if (bfd_is_abs_section (sec)) |
b5727d75 MS |
2554 | sindx = 0; |
2555 | else if (sec == NULL || sec->owner == NULL) | |
2556 | { | |
2557 | bfd_set_error(bfd_error_bad_value); | |
2558 | return FALSE; | |
2559 | } | |
2560 | else | |
2561 | { | |
2562 | asection *osec; | |
2563 | ||
2564 | osec = sec->output_section; | |
2565 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
2566 | |
2567 | if (sindx == 0) | |
2568 | { | |
2569 | osec = htab->elf.text_index_section; | |
2570 | sindx = elf_section_data (osec)->dynindx; | |
2571 | } | |
2572 | BFD_ASSERT (sindx != 0); | |
90ced0dd MS |
2573 | |
2574 | /* We are turning this relocation into one | |
2575 | against a section symbol, so subtract out | |
2576 | the output section's address but not the | |
2577 | offset of the input section in the output | |
2578 | section. */ | |
90ced0dd | 2579 | outrel.r_addend -= osec->vma; |
b5727d75 MS |
2580 | } |
2581 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
b5727d75 | 2582 | } |
0451c93c | 2583 | } |
a85d7ed0 | 2584 | |
0451c93c MS |
2585 | sreloc = elf_section_data (input_section)->sreloc; |
2586 | if (sreloc == NULL) | |
2587 | abort (); | |
2588 | ||
947216bf AM |
2589 | loc = sreloc->contents; |
2590 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2591 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
a85d7ed0 | 2592 | |
947216bf AM |
2593 | /* If this reloc is against an external symbol, we do |
2594 | not want to fiddle with the addend. Otherwise, we | |
2595 | need to include the symbol value so that it becomes | |
2596 | an addend for the dynamic reloc. */ | |
2597 | if (! relocate) | |
2598 | continue; | |
2599 | } | |
a85d7ed0 | 2600 | |
947216bf | 2601 | break; |
a85d7ed0 | 2602 | |
69fc87f1 MS |
2603 | /* Relocations for tls literal pool entries. */ |
2604 | case R_390_TLS_IE64: | |
2605 | if (info->shared) | |
2606 | { | |
2607 | Elf_Internal_Rela outrel; | |
2608 | asection *sreloc; | |
2609 | bfd_byte *loc; | |
2610 | ||
2611 | outrel.r_offset = rel->r_offset | |
2612 | + input_section->output_section->vma | |
2613 | + input_section->output_offset; | |
2614 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
2615 | sreloc = elf_section_data (input_section)->sreloc; | |
2616 | if (sreloc == NULL) | |
2617 | abort (); | |
2618 | loc = sreloc->contents; | |
2619 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2620 | bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); | |
2621 | } | |
ae9a127f | 2622 | /* Fall through. */ |
69fc87f1 MS |
2623 | |
2624 | case R_390_TLS_GD64: | |
2625 | case R_390_TLS_GOTIE64: | |
2626 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2627 | tls_type = GOT_UNKNOWN; | |
2628 | if (h == NULL && local_got_offsets) | |
2629 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2630 | else if (h != NULL) | |
2631 | { | |
2632 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2633 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2634 | r_type = R_390_TLS_LE64; | |
2635 | } | |
2636 | if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) | |
2637 | r_type = R_390_TLS_IE64; | |
2638 | ||
2639 | if (r_type == R_390_TLS_LE64) | |
2640 | { | |
2641 | /* This relocation gets optimized away by the local exec | |
2642 | access optimization. */ | |
2643 | BFD_ASSERT (! unresolved_reloc); | |
2644 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2645 | contents + rel->r_offset); | |
2646 | continue; | |
2647 | } | |
2648 | ||
2649 | if (htab->sgot == NULL) | |
2650 | abort (); | |
2651 | ||
2652 | if (h != NULL) | |
2653 | off = h->got.offset; | |
2654 | else | |
2655 | { | |
2656 | if (local_got_offsets == NULL) | |
2657 | abort (); | |
2658 | ||
2659 | off = local_got_offsets[r_symndx]; | |
2660 | } | |
2661 | ||
2662 | emit_tls_relocs: | |
2663 | ||
2664 | if ((off & 1) != 0) | |
2665 | off &= ~1; | |
26e41594 | 2666 | else |
69fc87f1 MS |
2667 | { |
2668 | Elf_Internal_Rela outrel; | |
2669 | bfd_byte *loc; | |
2670 | int dr_type, indx; | |
2671 | ||
2672 | if (htab->srelgot == NULL) | |
2673 | abort (); | |
2674 | ||
2675 | outrel.r_offset = (htab->sgot->output_section->vma | |
2676 | + htab->sgot->output_offset + off); | |
2677 | ||
2678 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2679 | if (r_type == R_390_TLS_GD64) | |
2680 | dr_type = R_390_TLS_DTPMOD; | |
2681 | else | |
2682 | dr_type = R_390_TLS_TPOFF; | |
2683 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2684 | outrel.r_addend = relocation - dtpoff_base (info); | |
2685 | else | |
2686 | outrel.r_addend = 0; | |
2687 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2688 | loc = htab->srelgot->contents; | |
2689 | loc += htab->srelgot->reloc_count++ | |
2690 | * sizeof (Elf64_External_Rela); | |
2691 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2692 | ||
2693 | if (r_type == R_390_TLS_GD64) | |
2694 | { | |
2695 | if (indx == 0) | |
2696 | { | |
2697 | BFD_ASSERT (! unresolved_reloc); | |
2698 | bfd_put_64 (output_bfd, | |
2699 | relocation - dtpoff_base (info), | |
2700 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2701 | } | |
2702 | else | |
2703 | { | |
2704 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); | |
2705 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2706 | outrel.r_addend = 0; | |
2707 | htab->srelgot->reloc_count++; | |
2708 | loc += sizeof (Elf64_External_Rela); | |
2709 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | if (h != NULL) | |
2714 | h->got.offset |= 1; | |
2715 | else | |
2716 | local_got_offsets[r_symndx] |= 1; | |
2717 | } | |
2718 | ||
2719 | if (off >= (bfd_vma) -2) | |
2720 | abort (); | |
2721 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2722 | { | |
2723 | relocation = htab->sgot->output_offset + off; | |
2724 | if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) | |
2725 | relocation += htab->sgot->output_section->vma; | |
2726 | unresolved_reloc = FALSE; | |
2727 | } | |
2728 | else | |
2729 | { | |
2730 | bfd_put_64 (output_bfd, htab->sgot->output_offset + off, | |
2731 | contents + rel->r_offset); | |
2732 | continue; | |
2733 | } | |
2734 | break; | |
2735 | ||
2736 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 2737 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
2738 | case R_390_TLS_IEENT: |
2739 | if (h == NULL) | |
2740 | { | |
2741 | if (local_got_offsets == NULL) | |
2742 | abort(); | |
2743 | off = local_got_offsets[r_symndx]; | |
2744 | if (info->shared) | |
2745 | goto emit_tls_relocs; | |
2746 | } | |
2747 | else | |
2748 | { | |
2749 | off = h->got.offset; | |
2750 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2751 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2752 | goto emit_tls_relocs; | |
2753 | } | |
2754 | ||
2755 | if (htab->sgot == NULL) | |
2756 | abort (); | |
2757 | ||
2758 | BFD_ASSERT (! unresolved_reloc); | |
2759 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2760 | htab->sgot->contents + off); | |
2761 | relocation = htab->sgot->output_offset + off; | |
2762 | if (r_type == R_390_TLS_IEENT) | |
2763 | relocation += htab->sgot->output_section->vma; | |
2764 | unresolved_reloc = FALSE; | |
2765 | break; | |
2766 | ||
2767 | case R_390_TLS_LDM64: | |
2768 | if (! info->shared) | |
2769 | /* The literal pool entry this relocation refers to gets ignored | |
2770 | by the optimized code of the local exec model. Do nothing | |
2771 | and the value will turn out zero. */ | |
2772 | continue; | |
2773 | ||
2774 | if (htab->sgot == NULL) | |
2775 | abort (); | |
2776 | ||
2777 | off = htab->tls_ldm_got.offset; | |
2778 | if (off & 1) | |
2779 | off &= ~1; | |
2780 | else | |
2781 | { | |
2782 | Elf_Internal_Rela outrel; | |
2783 | bfd_byte *loc; | |
2784 | ||
2785 | if (htab->srelgot == NULL) | |
2786 | abort (); | |
2787 | ||
2788 | outrel.r_offset = (htab->sgot->output_section->vma | |
2789 | + htab->sgot->output_offset + off); | |
2790 | ||
2791 | bfd_put_64 (output_bfd, 0, | |
2792 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2793 | outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); | |
2794 | outrel.r_addend = 0; | |
2795 | loc = htab->srelgot->contents; | |
2796 | loc += htab->srelgot->reloc_count++ | |
2797 | * sizeof (Elf64_External_Rela); | |
2798 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2799 | htab->tls_ldm_got.offset |= 1; | |
2800 | } | |
2801 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2802 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2803 | break; |
2804 | ||
2805 | case R_390_TLS_LE64: | |
2806 | if (info->shared) | |
2807 | { | |
2808 | /* Linking a shared library with non-fpic code requires | |
2809 | a R_390_TLS_TPOFF relocation. */ | |
2810 | Elf_Internal_Rela outrel; | |
2811 | asection *sreloc; | |
2812 | bfd_byte *loc; | |
2813 | int indx; | |
2814 | ||
2815 | outrel.r_offset = rel->r_offset | |
2816 | + input_section->output_section->vma | |
2817 | + input_section->output_offset; | |
2818 | if (h != NULL && h->dynindx != -1) | |
2819 | indx = h->dynindx; | |
2820 | else | |
2821 | indx = 0; | |
2822 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); | |
2823 | if (indx == 0) | |
2824 | outrel.r_addend = relocation - dtpoff_base (info); | |
2825 | else | |
2826 | outrel.r_addend = 0; | |
2827 | sreloc = elf_section_data (input_section)->sreloc; | |
2828 | if (sreloc == NULL) | |
2829 | abort (); | |
2830 | loc = sreloc->contents; | |
2831 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2832 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2833 | } | |
2834 | else | |
2835 | { | |
2836 | BFD_ASSERT (! unresolved_reloc); | |
2837 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2838 | contents + rel->r_offset); | |
2839 | } | |
2840 | continue; | |
2841 | ||
2842 | case R_390_TLS_LDO64: | |
de8bee76 | 2843 | if (info->shared || (input_section->flags & SEC_DEBUGGING)) |
69fc87f1 MS |
2844 | relocation -= dtpoff_base (info); |
2845 | else | |
2846 | /* When converting LDO to LE, we must negate. */ | |
2847 | relocation = -tpoff (info, relocation); | |
2848 | break; | |
2849 | ||
2850 | /* Relocations for tls instructions. */ | |
2851 | case R_390_TLS_LOAD: | |
2852 | case R_390_TLS_GDCALL: | |
2853 | case R_390_TLS_LDCALL: | |
2854 | tls_type = GOT_UNKNOWN; | |
2855 | if (h == NULL && local_got_offsets) | |
2856 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2857 | else if (h != NULL) | |
2858 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2859 | ||
2860 | if (tls_type == GOT_TLS_GD) | |
2861 | continue; | |
2862 | ||
2863 | if (r_type == R_390_TLS_LOAD) | |
2864 | { | |
2865 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2866 | { | |
2867 | /* IE->LE transition. Four valid cases: | |
2868 | lg %rx,(0,%ry) -> sllg %rx,%ry,0 | |
2869 | lg %rx,(%ry,0) -> sllg %rx,%ry,0 | |
2870 | lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 | |
2871 | lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2872 | unsigned int insn0, insn1, ry; | |
2873 | ||
2874 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2875 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2876 | if (insn1 != 0x0004) | |
2877 | invalid_tls_insn (input_bfd, input_section, rel); | |
2878 | ry = 0; | |
2879 | if ((insn0 & 0xff00f000) == 0xe3000000) | |
2880 | /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ | |
2881 | ry = (insn0 & 0x000f0000); | |
2882 | else if ((insn0 & 0xff0f0000) == 0xe3000000) | |
2883 | /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ | |
2884 | ry = (insn0 & 0x0000f000) << 4; | |
2885 | else if ((insn0 & 0xff00f000) == 0xe300c000) | |
2886 | /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ | |
2887 | ry = (insn0 & 0x000f0000); | |
2888 | else if ((insn0 & 0xff0f0000) == 0xe30c0000) | |
2889 | /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2890 | ry = (insn0 & 0x0000f000) << 4; | |
2891 | else | |
2892 | invalid_tls_insn (input_bfd, input_section, rel); | |
2893 | insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; | |
2894 | insn1 = 0x000d; | |
2895 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2896 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2897 | } | |
2898 | } | |
2899 | else if (r_type == R_390_TLS_GDCALL) | |
2900 | { | |
2901 | unsigned int insn0, insn1; | |
2902 | ||
2903 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2904 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2905 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2906 | invalid_tls_insn (input_bfd, input_section, rel); | |
2907 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2908 | { | |
2909 | /* GD->LE transition. | |
2910 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2911 | insn0 = 0xc0040000; | |
2912 | insn1 = 0x0000; | |
2913 | } | |
2914 | else | |
2915 | { | |
2916 | /* GD->IE transition. | |
2917 | brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ | |
2918 | insn0 = 0xe322c000; | |
2919 | insn1 = 0x0004; | |
2920 | } | |
2921 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2922 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2923 | } | |
2924 | else if (r_type == R_390_TLS_LDCALL) | |
2925 | { | |
2926 | if (!info->shared) | |
2927 | { | |
2928 | unsigned int insn0, insn1; | |
2929 | ||
2930 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2931 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2932 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2933 | invalid_tls_insn (input_bfd, input_section, rel); | |
2934 | /* LD->LE transition. | |
2935 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2936 | insn0 = 0xc0040000; | |
2937 | insn1 = 0x0000; | |
2938 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2939 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2940 | } | |
2941 | } | |
2942 | continue; | |
2943 | ||
947216bf AM |
2944 | default: |
2945 | break; | |
2946 | } | |
a85d7ed0 | 2947 | |
239e1f3a AM |
2948 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2949 | because such sections are not SEC_ALLOC and thus ld.so will | |
2950 | not process them. */ | |
0451c93c | 2951 | if (unresolved_reloc |
239e1f3a | 2952 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
2953 | && h->def_dynamic) |
2954 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
2955 | rel->r_offset) != (bfd_vma) -1) | |
0451c93c | 2956 | (*_bfd_error_handler) |
843fe662 | 2957 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
2958 | input_bfd, |
2959 | input_section, | |
0451c93c | 2960 | (long) rel->r_offset, |
843fe662 | 2961 | howto->name, |
0451c93c MS |
2962 | h->root.root.string); |
2963 | ||
bd1ea41b MS |
2964 | if (r_type == R_390_20 |
2965 | || r_type == R_390_GOT20 | |
2966 | || r_type == R_390_GOTPLT20 | |
2967 | || r_type == R_390_TLS_GOTIE20) | |
2968 | { | |
2969 | relocation += rel->r_addend; | |
2970 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; | |
2971 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2972 | contents, rel->r_offset, | |
2973 | relocation, 0); | |
2974 | } | |
2975 | else | |
2976 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
a85d7ed0 NC |
2977 | contents, rel->r_offset, |
2978 | relocation, rel->r_addend); | |
2979 | ||
2980 | if (r != bfd_reloc_ok) | |
2981 | { | |
0451c93c | 2982 | const char *name; |
ec338859 | 2983 | |
0451c93c MS |
2984 | if (h != NULL) |
2985 | name = h->root.root.string; | |
2986 | else | |
a85d7ed0 | 2987 | { |
0451c93c MS |
2988 | name = bfd_elf_string_from_elf_section (input_bfd, |
2989 | symtab_hdr->sh_link, | |
2990 | sym->st_name); | |
2991 | if (name == NULL) | |
b34976b6 | 2992 | return FALSE; |
0451c93c MS |
2993 | if (*name == '\0') |
2994 | name = bfd_section_name (input_bfd, sec); | |
2995 | } | |
ec338859 | 2996 | |
0451c93c MS |
2997 | if (r == bfd_reloc_overflow) |
2998 | { | |
ec338859 | 2999 | |
0451c93c | 3000 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3001 | (info, (h ? &h->root : NULL), name, howto->name, |
3002 | (bfd_vma) 0, input_bfd, input_section, | |
3003 | rel->r_offset))) | |
b34976b6 | 3004 | return FALSE; |
0451c93c MS |
3005 | } |
3006 | else | |
3007 | { | |
3008 | (*_bfd_error_handler) | |
d003868e AM |
3009 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3010 | input_bfd, input_section, | |
0451c93c | 3011 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3012 | return FALSE; |
a85d7ed0 NC |
3013 | } |
3014 | } | |
3015 | } | |
3016 | ||
b34976b6 | 3017 | return TRUE; |
a85d7ed0 NC |
3018 | } |
3019 | ||
3020 | /* Finish up dynamic symbol handling. We set the contents of various | |
3021 | dynamic sections here. */ | |
3022 | ||
b34976b6 | 3023 | static bfd_boolean |
4dfe6ac6 NC |
3024 | elf_s390_finish_dynamic_symbol (bfd *output_bfd, |
3025 | struct bfd_link_info *info, | |
3026 | struct elf_link_hash_entry *h, | |
3027 | Elf_Internal_Sym *sym) | |
a85d7ed0 | 3028 | { |
0451c93c | 3029 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 | 3030 | |
0451c93c | 3031 | htab = elf_s390_hash_table (info); |
4dfe6ac6 NC |
3032 | if (htab == NULL) |
3033 | return FALSE; | |
a85d7ed0 NC |
3034 | |
3035 | if (h->plt.offset != (bfd_vma) -1) | |
3036 | { | |
a85d7ed0 | 3037 | bfd_vma plt_index; |
0451c93c MS |
3038 | bfd_vma got_offset; |
3039 | Elf_Internal_Rela rela; | |
947216bf | 3040 | bfd_byte *loc; |
a85d7ed0 NC |
3041 | |
3042 | /* This symbol has an entry in the procedure linkage table. Set | |
947216bf | 3043 | it up. */ |
a85d7ed0 | 3044 | |
0451c93c MS |
3045 | if (h->dynindx == -1 |
3046 | || htab->splt == NULL | |
3047 | || htab->sgotplt == NULL | |
3048 | || htab->srelplt == NULL) | |
3049 | abort (); | |
a85d7ed0 | 3050 | |
99c79b2e | 3051 | /* Calc. index no. |
947216bf | 3052 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
3053 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
3054 | ||
3055 | /* Offset in GOT is PLT index plus GOT headers(3) times 8, | |
947216bf | 3056 | addr & GOT addr. */ |
a85d7ed0 NC |
3057 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3058 | ||
3059 | /* Fill in the blueprint of a PLT. */ | |
9aa17453 AK |
3060 | memcpy (htab->splt->contents + h->plt.offset, elf_s390x_plt_entry, |
3061 | PLT_ENTRY_SIZE); | |
3062 | ||
a85d7ed0 NC |
3063 | /* Fixup the relative address to the GOT entry */ |
3064 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3065 | (htab->sgotplt->output_section->vma + |
3066 | htab->sgotplt->output_offset + got_offset | |
3067 | - (htab->splt->output_section->vma + h->plt.offset))/2, | |
3068 | htab->splt->contents + h->plt.offset + 2); | |
a85d7ed0 NC |
3069 | /* Fixup the relative branch to PLT 0 */ |
3070 | bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + | |
3071 | (PLT_ENTRY_SIZE * plt_index) + 22)/2, | |
0451c93c | 3072 | htab->splt->contents + h->plt.offset + 24); |
a85d7ed0 NC |
3073 | /* Fixup offset into symbol table */ |
3074 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), | |
0451c93c | 3075 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3076 | |
3077 | /* Fill in the entry in the global offset table. | |
947216bf | 3078 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3079 | bfd_put_64 (output_bfd, |
0451c93c MS |
3080 | (htab->splt->output_section->vma |
3081 | + htab->splt->output_offset | |
a85d7ed0 NC |
3082 | + h->plt.offset |
3083 | + 14), | |
0451c93c | 3084 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3085 | |
0451c93c MS |
3086 | /* Fill in the entry in the .rela.plt section. */ |
3087 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3088 | + htab->sgotplt->output_offset | |
3089 | + got_offset); | |
3090 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3091 | rela.r_addend = 0; | |
947216bf | 3092 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
0451c93c | 3093 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 | 3094 | |
f5385ebf | 3095 | if (!h->def_regular) |
a85d7ed0 NC |
3096 | { |
3097 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3098 | the .plt section. Leave the value alone. This is a clue |
3099 | for the dynamic linker, to make function pointer | |
3100 | comparisons work between an application and shared | |
3101 | library. */ | |
a85d7ed0 NC |
3102 | sym->st_shndx = SHN_UNDEF; |
3103 | } | |
3104 | } | |
3105 | ||
69fc87f1 MS |
3106 | if (h->got.offset != (bfd_vma) -1 |
3107 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3108 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3109 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3110 | { |
a85d7ed0 | 3111 | Elf_Internal_Rela rela; |
947216bf | 3112 | bfd_byte *loc; |
a85d7ed0 NC |
3113 | |
3114 | /* This symbol has an entry in the global offset table. Set it | |
947216bf | 3115 | up. */ |
0451c93c MS |
3116 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3117 | abort (); | |
a85d7ed0 | 3118 | |
0451c93c MS |
3119 | rela.r_offset = (htab->sgot->output_section->vma |
3120 | + htab->sgot->output_offset | |
dc810e39 | 3121 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3122 | |
3123 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3124 | symbol is defined locally or was forced to be local because | |
3125 | of a version file, we just want to emit a RELATIVE reloc. | |
3126 | The entry in the global offset table will already have been | |
3127 | initialized in the relocate_section function. */ | |
0451c93c | 3128 | if (info->shared |
8c21ca21 | 3129 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
947216bf | 3130 | { |
8c21ca21 AK |
3131 | if (!h->def_regular) |
3132 | return FALSE; | |
0451c93c | 3133 | BFD_ASSERT((h->got.offset & 1) != 0); |
947216bf AM |
3134 | rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
3135 | rela.r_addend = (h->root.u.def.value | |
3136 | + h->root.u.def.section->output_section->vma | |
3137 | + h->root.u.def.section->output_offset); | |
3138 | } | |
a85d7ed0 NC |
3139 | else |
3140 | { | |
3141 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3142 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3143 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); |
947216bf AM |
3144 | rela.r_addend = 0; |
3145 | } | |
a85d7ed0 | 3146 | |
947216bf AM |
3147 | loc = htab->srelgot->contents; |
3148 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3149 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3150 | } |
3151 | ||
f5385ebf | 3152 | if (h->needs_copy) |
a85d7ed0 | 3153 | { |
a85d7ed0 | 3154 | Elf_Internal_Rela rela; |
947216bf | 3155 | bfd_byte *loc; |
a85d7ed0 NC |
3156 | |
3157 | /* This symbols needs a copy reloc. Set it up. */ | |
3158 | ||
0451c93c MS |
3159 | if (h->dynindx == -1 |
3160 | || (h->root.type != bfd_link_hash_defined | |
3161 | && h->root.type != bfd_link_hash_defweak) | |
3162 | || htab->srelbss == NULL) | |
3163 | abort (); | |
a85d7ed0 NC |
3164 | |
3165 | rela.r_offset = (h->root.u.def.value | |
3166 | + h->root.u.def.section->output_section->vma | |
3167 | + h->root.u.def.section->output_offset); | |
3168 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); | |
3169 | rela.r_addend = 0; | |
947216bf AM |
3170 | loc = htab->srelbss->contents; |
3171 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3172 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3173 | } |
3174 | ||
3175 | /* Mark some specially defined symbols as absolute. */ | |
3176 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 RS |
3177 | || h == htab->elf.hgot |
3178 | || h == htab->elf.hplt) | |
a85d7ed0 NC |
3179 | sym->st_shndx = SHN_ABS; |
3180 | ||
b34976b6 | 3181 | return TRUE; |
a85d7ed0 NC |
3182 | } |
3183 | ||
0451c93c MS |
3184 | /* Used to decide how to sort relocs in an optimal manner for the |
3185 | dynamic linker, before writing them out. */ | |
3186 | ||
3187 | static enum elf_reloc_type_class | |
3188 | elf_s390_reloc_type_class (rela) | |
3189 | const Elf_Internal_Rela *rela; | |
3190 | { | |
3191 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3192 | { | |
3193 | case R_390_RELATIVE: | |
3194 | return reloc_class_relative; | |
3195 | case R_390_JMP_SLOT: | |
3196 | return reloc_class_plt; | |
3197 | case R_390_COPY: | |
3198 | return reloc_class_copy; | |
3199 | default: | |
3200 | return reloc_class_normal; | |
3201 | } | |
3202 | } | |
3203 | ||
a85d7ed0 NC |
3204 | /* Finish up the dynamic sections. */ |
3205 | ||
b34976b6 | 3206 | static bfd_boolean |
4dfe6ac6 NC |
3207 | elf_s390_finish_dynamic_sections (bfd *output_bfd, |
3208 | struct bfd_link_info *info) | |
a85d7ed0 | 3209 | { |
0451c93c | 3210 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3211 | bfd *dynobj; |
3212 | asection *sdyn; | |
a85d7ed0 | 3213 | |
0451c93c | 3214 | htab = elf_s390_hash_table (info); |
4dfe6ac6 NC |
3215 | if (htab == NULL) |
3216 | return FALSE; | |
3217 | ||
0451c93c | 3218 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
3219 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3220 | ||
0451c93c | 3221 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3222 | { |
a85d7ed0 NC |
3223 | Elf64_External_Dyn *dyncon, *dynconend; |
3224 | ||
0451c93c MS |
3225 | if (sdyn == NULL || htab->sgot == NULL) |
3226 | abort (); | |
a85d7ed0 NC |
3227 | |
3228 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 3229 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
a85d7ed0 NC |
3230 | for (; dyncon < dynconend; dyncon++) |
3231 | { | |
3232 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3233 | asection *s; |
ec338859 | 3234 | |
a85d7ed0 | 3235 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3236 | |
a85d7ed0 NC |
3237 | switch (dyn.d_tag) |
3238 | { | |
3239 | default: | |
0451c93c | 3240 | continue; |
ec338859 | 3241 | |
a85d7ed0 | 3242 | case DT_PLTGOT: |
0451c93c MS |
3243 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3244 | break; | |
ec338859 | 3245 | |
a85d7ed0 | 3246 | case DT_JMPREL: |
0451c93c | 3247 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 | 3248 | break; |
ec338859 | 3249 | |
a85d7ed0 | 3250 | case DT_PLTRELSZ: |
0451c93c | 3251 | s = htab->srelplt->output_section; |
eea6121a | 3252 | dyn.d_un.d_val = s->size; |
a85d7ed0 | 3253 | break; |
ec338859 | 3254 | |
a85d7ed0 NC |
3255 | case DT_RELASZ: |
3256 | /* The procedure linkage table relocs (DT_JMPREL) should | |
3257 | not be included in the overall relocs (DT_RELA). | |
3258 | Therefore, we override the DT_RELASZ entry here to | |
3259 | make it not include the JMPREL relocs. Since the | |
3260 | linker script arranges for .rela.plt to follow all | |
3261 | other relocation sections, we don't have to worry | |
3262 | about changing the DT_RELA entry. */ | |
0451c93c | 3263 | s = htab->srelplt->output_section; |
eea6121a | 3264 | dyn.d_un.d_val -= s->size; |
a85d7ed0 NC |
3265 | break; |
3266 | } | |
0451c93c MS |
3267 | |
3268 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3269 | } |
3270 | ||
3271 | /* Fill in the special first entry in the procedure linkage table. */ | |
eea6121a | 3272 | if (htab->splt && htab->splt->size > 0) |
a85d7ed0 NC |
3273 | { |
3274 | /* fill in blueprint for plt 0 entry */ | |
9aa17453 AK |
3275 | memcpy (htab->splt->contents, elf_s390x_first_plt_entry, |
3276 | PLT_FIRST_ENTRY_SIZE); | |
a85d7ed0 NC |
3277 | /* Fixup relative address to start of GOT */ |
3278 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3279 | (htab->sgotplt->output_section->vma + |
3280 | htab->sgotplt->output_offset | |
3281 | - htab->splt->output_section->vma - 6)/2, | |
3282 | htab->splt->contents + 8); | |
a85d7ed0 | 3283 | } |
0451c93c MS |
3284 | elf_section_data (htab->splt->output_section) |
3285 | ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; | |
a85d7ed0 NC |
3286 | } |
3287 | ||
0451c93c | 3288 | if (htab->sgotplt) |
a85d7ed0 | 3289 | { |
0451c93c | 3290 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3291 | if (htab->sgotplt->size > 0) |
0451c93c MS |
3292 | { |
3293 | bfd_put_64 (output_bfd, | |
3294 | (sdyn == NULL ? (bfd_vma) 0 | |
3295 | : sdyn->output_section->vma + sdyn->output_offset), | |
3296 | htab->sgotplt->contents); | |
3297 | /* One entry for shared object struct ptr. */ | |
3298 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3299 | /* One entry for _dl_runtime_resolve. */ | |
3300 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12); | |
3301 | } | |
a85d7ed0 | 3302 | |
0451c93c MS |
3303 | elf_section_data (htab->sgot->output_section) |
3304 | ->this_hdr.sh_entsize = 8; | |
3305 | } | |
b34976b6 | 3306 | return TRUE; |
a85d7ed0 NC |
3307 | } |
3308 | ||
4c45e5c9 JJ |
3309 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3310 | or (bfd_vma) -1 if it should not be included. */ | |
3311 | ||
3312 | static bfd_vma | |
3313 | elf_s390_plt_sym_val (bfd_vma i, const asection *plt, | |
3314 | const arelent *rel ATTRIBUTE_UNUSED) | |
3315 | { | |
3316 | return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; | |
3317 | } | |
3318 | ||
3319 | ||
ae9a127f NC |
3320 | /* Why was the hash table entry size definition changed from |
3321 | ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and | |
3322 | this is the only reason for the s390_elf64_size_info structure. */ | |
a85d7ed0 NC |
3323 | |
3324 | const struct elf_size_info s390_elf64_size_info = | |
3325 | { | |
3326 | sizeof (Elf64_External_Ehdr), | |
3327 | sizeof (Elf64_External_Phdr), | |
3328 | sizeof (Elf64_External_Shdr), | |
3329 | sizeof (Elf64_External_Rel), | |
3330 | sizeof (Elf64_External_Rela), | |
3331 | sizeof (Elf64_External_Sym), | |
3332 | sizeof (Elf64_External_Dyn), | |
3333 | sizeof (Elf_External_Note), | |
ae9a127f NC |
3334 | 8, /* hash-table entry size. */ |
3335 | 1, /* internal relocations per external relocations. */ | |
3336 | 64, /* arch_size. */ | |
45d6a902 | 3337 | 3, /* log_file_align. */ |
a85d7ed0 NC |
3338 | ELFCLASS64, EV_CURRENT, |
3339 | bfd_elf64_write_out_phdrs, | |
3340 | bfd_elf64_write_shdrs_and_ehdr, | |
1489a3a0 | 3341 | bfd_elf64_checksum_contents, |
a85d7ed0 | 3342 | bfd_elf64_write_relocs, |
73ff0d56 | 3343 | bfd_elf64_swap_symbol_in, |
a85d7ed0 NC |
3344 | bfd_elf64_swap_symbol_out, |
3345 | bfd_elf64_slurp_reloc_table, | |
3346 | bfd_elf64_slurp_symbol_table, | |
3347 | bfd_elf64_swap_dyn_in, | |
3348 | bfd_elf64_swap_dyn_out, | |
947216bf AM |
3349 | bfd_elf64_swap_reloc_in, |
3350 | bfd_elf64_swap_reloc_out, | |
3351 | bfd_elf64_swap_reloca_in, | |
3352 | bfd_elf64_swap_reloca_out | |
a85d7ed0 NC |
3353 | }; |
3354 | ||
3355 | #define TARGET_BIG_SYM bfd_elf64_s390_vec | |
3356 | #define TARGET_BIG_NAME "elf64-s390" | |
3357 | #define ELF_ARCH bfd_arch_s390 | |
ae95ffa6 | 3358 | #define ELF_TARGET_ID S390_ELF_DATA |
a85d7ed0 NC |
3359 | #define ELF_MACHINE_CODE EM_S390 |
3360 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3361 | #define ELF_MAXPAGESIZE 0x1000 | |
3362 | ||
3363 | #define elf_backend_size_info s390_elf64_size_info | |
3364 | ||
3365 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3366 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3367 | #define elf_backend_want_got_plt 1 |
3368 | #define elf_backend_plt_readonly 1 | |
3369 | #define elf_backend_want_plt_sym 0 | |
3370 | #define elf_backend_got_header_size 24 | |
b491616a | 3371 | #define elf_backend_rela_normal 1 |
a85d7ed0 NC |
3372 | |
3373 | #define elf_info_to_howto elf_s390_info_to_howto | |
3374 | ||
a85d7ed0 NC |
3375 | #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name |
3376 | #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3377 | #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
157090f7 | 3378 | #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup |
a85d7ed0 NC |
3379 | |
3380 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
3381 | #define elf_backend_check_relocs elf_s390_check_relocs | |
0451c93c MS |
3382 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3383 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3384 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3385 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
3386 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook | |
3387 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3388 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
a85d7ed0 NC |
3389 | #define elf_backend_relocate_section elf_s390_relocate_section |
3390 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections | |
74541ad4 | 3391 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
29c2fb7c | 3392 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
4c45e5c9 | 3393 | #define elf_backend_plt_sym_val elf_s390_plt_sym_val |
a85d7ed0 | 3394 | |
69fc87f1 MS |
3395 | #define bfd_elf64_mkobject elf_s390_mkobject |
3396 | #define elf_backend_object_p elf_s390_object_p | |
a85d7ed0 NC |
3397 | |
3398 | #include "elf64-target.h" |