Commit | Line | Data |
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a85d7ed0 | 1 | /* IBM S/390-specific support for 32-bit ELF |
0ffa91dd | 2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
3eb128b2 | 3 | Free Software Foundation, Inc. |
a85d7ed0 NC |
4 | Contributed by Carl B. Pedersen and Martin Schwidefsky. |
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 *)); |
b34976b6 AM |
70 | static bfd_boolean elf_s390_object_p |
71 | PARAMS ((bfd *)); | |
72 | static bfd_boolean elf_s390_grok_prstatus | |
73 | PARAMS ((bfd *, Elf_Internal_Note *)); | |
69fc87f1 MS |
74 | static int elf_s390_tls_transition |
75 | PARAMS ((struct bfd_link_info *, int, int)); | |
76 | static bfd_reloc_status_type s390_tls_reloc | |
77 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
78 | static bfd_vma dtpoff_base | |
79 | PARAMS ((struct bfd_link_info *)); | |
80 | static bfd_vma tpoff | |
81 | PARAMS ((struct bfd_link_info *, bfd_vma)); | |
82 | static void invalid_tls_insn | |
83 | PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); | |
bd1ea41b MS |
84 | static bfd_reloc_status_type s390_elf_ldisp_reloc |
85 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
a85d7ed0 | 86 | |
a85d7ed0 NC |
87 | #include "elf/s390.h" |
88 | ||
89 | /* The relocation "howto" table. */ | |
90 | ||
91 | static reloc_howto_type elf_howto_table[] = | |
92 | { | |
93 | HOWTO (R_390_NONE, /* type */ | |
94 | 0, /* rightshift */ | |
95 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
96 | 0, /* bitsize */ | |
b34976b6 | 97 | FALSE, /* pc_relative */ |
a85d7ed0 NC |
98 | 0, /* bitpos */ |
99 | complain_overflow_dont, /* complain_on_overflow */ | |
100 | bfd_elf_generic_reloc, /* special_function */ | |
101 | "R_390_NONE", /* name */ | |
b34976b6 | 102 | FALSE, /* partial_inplace */ |
a85d7ed0 NC |
103 | 0, /* src_mask */ |
104 | 0, /* dst_mask */ | |
b34976b6 AM |
105 | FALSE), /* pcrel_offset */ |
106 | ||
5236c819 MS |
107 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
108 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), | |
109 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
110 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), | |
111 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
112 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), | |
113 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
114 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), | |
115 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
116 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), | |
15f8604d | 117 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, |
5236c819 MS |
118 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
119 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
120 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), | |
121 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
122 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), | |
123 | HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
124 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), | |
125 | HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
126 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), | |
127 | HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
128 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), | |
129 | HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
130 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), | |
131 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
132 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), | |
133 | HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
134 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), | |
135 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
136 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), | |
137 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
138 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), | |
139 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
140 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), | |
141 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
142 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), | |
143 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
144 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), | |
145 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
146 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), | |
147 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
148 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), | |
149 | EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ | |
150 | EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ | |
151 | EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ | |
152 | EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ | |
153 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
154 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), | |
155 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
156 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
157 | EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ | |
158 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
159 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), | |
160 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
161 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), | |
162 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
163 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), | |
164 | EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ | |
165 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
166 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), | |
167 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
168 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
169 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
170 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), | |
171 | EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ | |
69fc87f1 MS |
172 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
173 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), | |
174 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
175 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), | |
176 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
177 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), | |
178 | HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
179 | bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), | |
180 | EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ | |
181 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
182 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), | |
183 | HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
184 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), | |
185 | EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ | |
186 | HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
187 | bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), | |
188 | EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ | |
189 | HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
190 | bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), | |
191 | EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ | |
192 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
193 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), | |
194 | HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
195 | bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), | |
196 | EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ | |
197 | HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
198 | bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), | |
199 | EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ | |
200 | HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
201 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), | |
202 | HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
203 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), | |
204 | HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
205 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), | |
bd1ea41b MS |
206 | HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
207 | s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), | |
208 | HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
209 | s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), | |
210 | HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
211 | s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), | |
212 | HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
213 | s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), | |
a85d7ed0 NC |
214 | }; |
215 | ||
216 | /* GNU extension to record C++ vtable hierarchy. */ | |
217 | static reloc_howto_type elf32_s390_vtinherit_howto = | |
b34976b6 | 218 | HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
a85d7ed0 | 219 | static reloc_howto_type elf32_s390_vtentry_howto = |
b34976b6 | 220 | HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); |
a85d7ed0 NC |
221 | |
222 | static reloc_howto_type * | |
223 | elf_s390_reloc_type_lookup (abfd, code) | |
224 | bfd *abfd ATTRIBUTE_UNUSED; | |
225 | bfd_reloc_code_real_type code; | |
226 | { | |
ec338859 | 227 | switch (code) |
0451c93c MS |
228 | { |
229 | case BFD_RELOC_NONE: | |
230 | return &elf_howto_table[(int) R_390_NONE]; | |
231 | case BFD_RELOC_8: | |
232 | return &elf_howto_table[(int) R_390_8]; | |
233 | case BFD_RELOC_390_12: | |
234 | return &elf_howto_table[(int) R_390_12]; | |
235 | case BFD_RELOC_16: | |
236 | return &elf_howto_table[(int) R_390_16]; | |
237 | case BFD_RELOC_32: | |
238 | return &elf_howto_table[(int) R_390_32]; | |
239 | case BFD_RELOC_CTOR: | |
240 | return &elf_howto_table[(int) R_390_32]; | |
241 | case BFD_RELOC_32_PCREL: | |
242 | return &elf_howto_table[(int) R_390_PC32]; | |
243 | case BFD_RELOC_390_GOT12: | |
244 | return &elf_howto_table[(int) R_390_GOT12]; | |
245 | case BFD_RELOC_32_GOT_PCREL: | |
246 | return &elf_howto_table[(int) R_390_GOT32]; | |
247 | case BFD_RELOC_390_PLT32: | |
248 | return &elf_howto_table[(int) R_390_PLT32]; | |
249 | case BFD_RELOC_390_COPY: | |
250 | return &elf_howto_table[(int) R_390_COPY]; | |
251 | case BFD_RELOC_390_GLOB_DAT: | |
252 | return &elf_howto_table[(int) R_390_GLOB_DAT]; | |
253 | case BFD_RELOC_390_JMP_SLOT: | |
254 | return &elf_howto_table[(int) R_390_JMP_SLOT]; | |
255 | case BFD_RELOC_390_RELATIVE: | |
256 | return &elf_howto_table[(int) R_390_RELATIVE]; | |
257 | case BFD_RELOC_32_GOTOFF: | |
5236c819 | 258 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
0451c93c MS |
259 | case BFD_RELOC_390_GOTPC: |
260 | return &elf_howto_table[(int) R_390_GOTPC]; | |
261 | case BFD_RELOC_390_GOT16: | |
262 | return &elf_howto_table[(int) R_390_GOT16]; | |
263 | case BFD_RELOC_16_PCREL: | |
264 | return &elf_howto_table[(int) R_390_PC16]; | |
265 | case BFD_RELOC_390_PC16DBL: | |
266 | return &elf_howto_table[(int) R_390_PC16DBL]; | |
267 | case BFD_RELOC_390_PLT16DBL: | |
268 | return &elf_howto_table[(int) R_390_PLT16DBL]; | |
befc3abb MS |
269 | case BFD_RELOC_390_PC32DBL: |
270 | return &elf_howto_table[(int) R_390_PC32DBL]; | |
271 | case BFD_RELOC_390_PLT32DBL: | |
272 | return &elf_howto_table[(int) R_390_PLT32DBL]; | |
273 | case BFD_RELOC_390_GOTPCDBL: | |
274 | return &elf_howto_table[(int) R_390_GOTPCDBL]; | |
275 | case BFD_RELOC_390_GOTENT: | |
276 | return &elf_howto_table[(int) R_390_GOTENT]; | |
5236c819 MS |
277 | case BFD_RELOC_16_GOTOFF: |
278 | return &elf_howto_table[(int) R_390_GOTOFF16]; | |
279 | case BFD_RELOC_390_GOTPLT12: | |
280 | return &elf_howto_table[(int) R_390_GOTPLT12]; | |
281 | case BFD_RELOC_390_GOTPLT16: | |
282 | return &elf_howto_table[(int) R_390_GOTPLT16]; | |
283 | case BFD_RELOC_390_GOTPLT32: | |
284 | return &elf_howto_table[(int) R_390_GOTPLT32]; | |
285 | case BFD_RELOC_390_GOTPLTENT: | |
286 | return &elf_howto_table[(int) R_390_GOTPLTENT]; | |
287 | case BFD_RELOC_390_PLTOFF16: | |
288 | return &elf_howto_table[(int) R_390_PLTOFF16]; | |
289 | case BFD_RELOC_390_PLTOFF32: | |
290 | return &elf_howto_table[(int) R_390_PLTOFF32]; | |
69fc87f1 MS |
291 | case BFD_RELOC_390_TLS_LOAD: |
292 | return &elf_howto_table[(int) R_390_TLS_LOAD]; | |
293 | case BFD_RELOC_390_TLS_GDCALL: | |
294 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; | |
295 | case BFD_RELOC_390_TLS_LDCALL: | |
296 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; | |
297 | case BFD_RELOC_390_TLS_GD32: | |
298 | return &elf_howto_table[(int) R_390_TLS_GD32]; | |
299 | case BFD_RELOC_390_TLS_GOTIE12: | |
300 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; | |
301 | case BFD_RELOC_390_TLS_GOTIE32: | |
302 | return &elf_howto_table[(int) R_390_TLS_GOTIE32]; | |
303 | case BFD_RELOC_390_TLS_LDM32: | |
304 | return &elf_howto_table[(int) R_390_TLS_LDM32]; | |
305 | case BFD_RELOC_390_TLS_IE32: | |
306 | return &elf_howto_table[(int) R_390_TLS_IE32]; | |
307 | case BFD_RELOC_390_TLS_IEENT: | |
308 | return &elf_howto_table[(int) R_390_TLS_IEENT]; | |
309 | case BFD_RELOC_390_TLS_LE32: | |
310 | return &elf_howto_table[(int) R_390_TLS_LE32]; | |
311 | case BFD_RELOC_390_TLS_LDO32: | |
312 | return &elf_howto_table[(int) R_390_TLS_LDO32]; | |
313 | case BFD_RELOC_390_TLS_DTPMOD: | |
314 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; | |
315 | case BFD_RELOC_390_TLS_DTPOFF: | |
316 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; | |
317 | case BFD_RELOC_390_TLS_TPOFF: | |
318 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; | |
bd1ea41b MS |
319 | case BFD_RELOC_390_20: |
320 | return &elf_howto_table[(int) R_390_20]; | |
321 | case BFD_RELOC_390_GOT20: | |
322 | return &elf_howto_table[(int) R_390_GOT20]; | |
323 | case BFD_RELOC_390_GOTPLT20: | |
324 | return &elf_howto_table[(int) R_390_GOTPLT20]; | |
325 | case BFD_RELOC_390_TLS_GOTIE20: | |
326 | return &elf_howto_table[(int) R_390_TLS_GOTIE20]; | |
0451c93c MS |
327 | case BFD_RELOC_VTABLE_INHERIT: |
328 | return &elf32_s390_vtinherit_howto; | |
329 | case BFD_RELOC_VTABLE_ENTRY: | |
330 | return &elf32_s390_vtentry_howto; | |
331 | default: | |
332 | break; | |
333 | } | |
a85d7ed0 NC |
334 | return 0; |
335 | } | |
336 | ||
157090f7 AM |
337 | static reloc_howto_type * |
338 | elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
339 | const char *r_name) | |
340 | { | |
341 | unsigned int i; | |
342 | ||
343 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
344 | if (elf_howto_table[i].name != NULL | |
345 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
346 | return &elf_howto_table[i]; | |
347 | ||
348 | if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0) | |
349 | return &elf32_s390_vtinherit_howto; | |
350 | if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0) | |
351 | return &elf32_s390_vtentry_howto; | |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
a85d7ed0 NC |
356 | /* We need to use ELF32_R_TYPE so we have our own copy of this function, |
357 | and elf32-s390.c has its own copy. */ | |
358 | ||
359 | static void | |
360 | elf_s390_info_to_howto (abfd, cache_ptr, dst) | |
361 | bfd *abfd ATTRIBUTE_UNUSED; | |
362 | arelent *cache_ptr; | |
363 | Elf_Internal_Rela *dst; | |
364 | { | |
d0fb9a8d JJ |
365 | unsigned int r_type = ELF32_R_TYPE(dst->r_info); |
366 | switch (r_type) | |
a85d7ed0 NC |
367 | { |
368 | case R_390_GNU_VTINHERIT: | |
369 | cache_ptr->howto = &elf32_s390_vtinherit_howto; | |
370 | break; | |
371 | ||
372 | case R_390_GNU_VTENTRY: | |
373 | cache_ptr->howto = &elf32_s390_vtentry_howto; | |
374 | break; | |
375 | ||
376 | default: | |
d0fb9a8d JJ |
377 | if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) |
378 | { | |
379 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
380 | abfd, (int) r_type); | |
381 | r_type = R_390_NONE; | |
382 | } | |
383 | cache_ptr->howto = &elf_howto_table[r_type]; | |
dc810e39 | 384 | } |
a85d7ed0 NC |
385 | } |
386 | ||
69fc87f1 MS |
387 | /* A relocation function which doesn't do anything. */ |
388 | static bfd_reloc_status_type | |
389 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 390 | output_bfd, error_message) |
69fc87f1 MS |
391 | bfd *abfd ATTRIBUTE_UNUSED; |
392 | arelent *reloc_entry; | |
393 | asymbol *symbol ATTRIBUTE_UNUSED; | |
394 | PTR data ATTRIBUTE_UNUSED; | |
395 | asection *input_section; | |
396 | bfd *output_bfd; | |
397 | char **error_message ATTRIBUTE_UNUSED; | |
398 | { | |
399 | if (output_bfd) | |
400 | reloc_entry->address += input_section->output_offset; | |
401 | return bfd_reloc_ok; | |
402 | } | |
403 | ||
bd1ea41b MS |
404 | /* Handle the large displacement relocs. */ |
405 | static bfd_reloc_status_type | |
406 | s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, | |
407 | output_bfd, error_message) | |
408 | bfd *abfd ATTRIBUTE_UNUSED; | |
409 | arelent *reloc_entry; | |
410 | asymbol *symbol; | |
411 | PTR data ATTRIBUTE_UNUSED; | |
412 | asection *input_section; | |
413 | bfd *output_bfd; | |
414 | char **error_message ATTRIBUTE_UNUSED; | |
415 | { | |
416 | reloc_howto_type *howto = reloc_entry->howto; | |
417 | bfd_vma relocation; | |
418 | bfd_vma insn; | |
419 | ||
420 | if (output_bfd != (bfd *) NULL | |
421 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
422 | && (! howto->partial_inplace | |
423 | || reloc_entry->addend == 0)) | |
424 | { | |
425 | reloc_entry->address += input_section->output_offset; | |
426 | return bfd_reloc_ok; | |
427 | } | |
428 | ||
429 | if (output_bfd != NULL) | |
430 | return bfd_reloc_continue; | |
431 | ||
07515404 | 432 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
bd1ea41b MS |
433 | return bfd_reloc_outofrange; |
434 | ||
435 | relocation = (symbol->value | |
436 | + symbol->section->output_section->vma | |
437 | + symbol->section->output_offset); | |
438 | relocation += reloc_entry->addend; | |
439 | if (howto->pc_relative) | |
440 | { | |
441 | relocation -= (input_section->output_section->vma | |
442 | + input_section->output_offset); | |
443 | relocation -= reloc_entry->address; | |
444 | } | |
445 | ||
446 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
447 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; | |
448 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
449 | ||
450 | if ((bfd_signed_vma) relocation < - 0x80000 | |
451 | || (bfd_signed_vma) relocation > 0x7ffff) | |
452 | return bfd_reloc_overflow; | |
453 | else | |
454 | return bfd_reloc_ok; | |
455 | } | |
456 | ||
b34976b6 | 457 | static bfd_boolean |
a85d7ed0 NC |
458 | elf_s390_is_local_label_name (abfd, name) |
459 | bfd *abfd; | |
460 | const char *name; | |
461 | { | |
462 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 463 | return TRUE; |
a85d7ed0 NC |
464 | |
465 | return _bfd_elf_is_local_label_name (abfd, name); | |
466 | } | |
467 | ||
468 | /* Functions for the 390 ELF linker. */ | |
469 | ||
470 | /* The name of the dynamic interpreter. This is put in the .interp | |
471 | section. */ | |
472 | ||
473 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
474 | ||
64285810 MS |
475 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
476 | copying dynamic variables from a shared lib into an app's dynbss | |
477 | section, and instead use a dynamic relocation to point into the | |
478 | shared lib. */ | |
479 | #define ELIMINATE_COPY_RELOCS 1 | |
480 | ||
a85d7ed0 NC |
481 | /* The size in bytes of the first entry in the procedure linkage table. */ |
482 | #define PLT_FIRST_ENTRY_SIZE 32 | |
483 | /* The size in bytes of an entry in the procedure linkage table. */ | |
dc810e39 | 484 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
485 | |
486 | #define GOT_ENTRY_SIZE 4 | |
487 | ||
488 | /* The first three entries in a procedure linkage table are reserved, | |
489 | and the initial contents are unimportant (we zero them out). | |
490 | Subsequent entries look like this. See the SVR4 ABI 386 | |
491 | supplement to see how this works. */ | |
492 | ||
493 | /* For the s390, simple addr offset can only be 0 - 4096. | |
494 | To use the full 2 GB address space, several instructions | |
495 | are needed to load an address in a register and execute | |
496 | a branch( or just saving the address) | |
497 | ||
dc810e39 | 498 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
499 | |
500 | /* The first 3 words in the GOT are then reserved. | |
501 | Word 0 is the address of the dynamic table. | |
502 | Word 1 is a pointer to a structure describing the object | |
503 | Word 2 is used to point to the loader entry address. | |
504 | ||
4cc11e76 | 505 | The code for position independent PLT entries looks like this: |
a85d7ed0 NC |
506 | |
507 | r12 holds addr of the current GOT at entry to the PLT | |
508 | ||
509 | The GOT holds the address in the PLT to be executed. | |
510 | The loader then gets: | |
511 | 24(15) = Pointer to the structure describing the object. | |
dc810e39 | 512 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
513 | |
514 | The loader must then find the module where the function is | |
515 | and insert the address in the GOT. | |
516 | ||
517 | Note: 390 can only address +- 64 K relative. | |
518 | We check if offset > 65536, then make a relative branch -64xxx | |
519 | back to a previous defined branch | |
520 | ||
521 | PLT1: BASR 1,0 # 2 bytes | |
522 | L 1,22(1) # 4 bytes Load offset in GOT in r 1 | |
523 | L 1,(1,12) # 4 bytes Load address from GOT in r1 | |
524 | BCR 15,1 # 2 bytes Jump to address | |
525 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
526 | L 1,14(1) # 4 bytes Load offset in symol table in r1 | |
527 | BRC 15,-x # 4 bytes Jump to start of PLT | |
528 | .word 0 # 2 bytes filler | |
529 | .long ? # 4 bytes offset in GOT | |
530 | .long ? # 4 bytes offset into symbol table | |
531 | ||
532 | This was the general case. There are two additional, optimizes PLT | |
533 | definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. | |
534 | First the one for GOT offsets < 4096: | |
535 | ||
536 | PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 | |
537 | BCR 15,1 # 2 bytes Jump to address | |
538 | .word 0,0,0 # 6 bytes filler | |
539 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
540 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
541 | BRC 15,-x # 4 bytes Jump to start of PLT | |
542 | .word 0,0,0 # 6 bytes filler | |
543 | .long ? # 4 bytes offset into symbol table | |
544 | ||
545 | Second the one for GOT offsets < 32768: | |
546 | ||
547 | PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 | |
548 | L 1,(1,12) # 4 bytes Load address from GOT to r1 | |
549 | BCR 15,1 # 2 bytes Jump to address | |
550 | .word 0 # 2 bytes filler | |
551 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
552 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
553 | BRC 15,-x # 4 bytes Jump to start of PLT | |
554 | .word 0,0,0 # 6 bytes filler | |
555 | .long ? # 4 bytes offset into symbol table | |
556 | ||
557 | Total = 32 bytes per PLT entry | |
558 | ||
559 | The code for static build PLT entries looks like this: | |
560 | ||
561 | PLT1: BASR 1,0 # 2 bytes | |
562 | L 1,22(1) # 4 bytes Load address of GOT entry | |
563 | L 1,0(0,1) # 4 bytes Load address from GOT in r1 | |
564 | BCR 15,1 # 2 bytes Jump to address | |
565 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
566 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 | |
567 | BRC 15,-x # 4 bytes Jump to start of PLT | |
568 | .word 0 # 2 bytes filler | |
569 | .long ? # 4 bytes address of GOT entry | |
570 | .long ? # 4 bytes offset into symbol table */ | |
571 | ||
572 | #define PLT_PIC_ENTRY_WORD0 0x0d105810 | |
573 | #define PLT_PIC_ENTRY_WORD1 0x10165811 | |
574 | #define PLT_PIC_ENTRY_WORD2 0xc00007f1 | |
575 | #define PLT_PIC_ENTRY_WORD3 0x0d105810 | |
576 | #define PLT_PIC_ENTRY_WORD4 0x100ea7f4 | |
577 | ||
578 | #define PLT_PIC12_ENTRY_WORD0 0x5810c000 | |
579 | #define PLT_PIC12_ENTRY_WORD1 0x07f10000 | |
580 | #define PLT_PIC12_ENTRY_WORD2 0x00000000 | |
581 | #define PLT_PIC12_ENTRY_WORD3 0x0d105810 | |
582 | #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4 | |
583 | ||
584 | #define PLT_PIC16_ENTRY_WORD0 0xa7180000 | |
585 | #define PLT_PIC16_ENTRY_WORD1 0x5811c000 | |
586 | #define PLT_PIC16_ENTRY_WORD2 0x07f10000 | |
587 | #define PLT_PIC16_ENTRY_WORD3 0x0d105810 | |
588 | #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4 | |
589 | ||
590 | #define PLT_ENTRY_WORD0 0x0d105810 | |
591 | #define PLT_ENTRY_WORD1 0x10165810 | |
592 | #define PLT_ENTRY_WORD2 0x100007f1 | |
593 | #define PLT_ENTRY_WORD3 0x0d105810 | |
594 | #define PLT_ENTRY_WORD4 0x100ea7f4 | |
595 | ||
596 | /* The first PLT entry pushes the offset into the symbol table | |
597 | from R1 onto the stack at 8(15) and the loader object info | |
598 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
599 | ||
600 | /* The first entry in the PLT for PIC code: | |
601 | ||
602 | PLT0: | |
603 | ST 1,28(15) # R1 has offset into symbol table | |
604 | L 1,4(12) # Get loader ino(object struct address) | |
dc810e39 | 605 | ST 1,24(15) # Store address |
a85d7ed0 NC |
606 | L 1,8(12) # Entry address of loader in R1 |
607 | BR 1 # Jump to loader | |
608 | ||
609 | The first entry in the PLT for static code: | |
610 | ||
611 | PLT0: | |
612 | ST 1,28(15) # R1 has offset into symbol table | |
613 | BASR 1,0 | |
614 | L 1,18(0,1) # Get address of GOT | |
615 | MVC 24(4,15),4(1) # Move loader ino to stack | |
616 | L 1,8(1) # Get address of loader | |
617 | BR 1 # Jump to loader | |
618 | .word 0 # filler | |
619 | .long got # address of GOT */ | |
620 | ||
621 | #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c | |
622 | #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004 | |
623 | #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018 | |
624 | #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008 | |
625 | #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000 | |
626 | ||
627 | #define PLT_FIRST_ENTRY_WORD0 0x5010f01c | |
628 | #define PLT_FIRST_ENTRY_WORD1 0x0d105810 | |
629 | #define PLT_FIRST_ENTRY_WORD2 0x1012D203 | |
630 | #define PLT_FIRST_ENTRY_WORD3 0xf0181004 | |
631 | #define PLT_FIRST_ENTRY_WORD4 0x58101008 | |
632 | #define PLT_FIRST_ENTRY_WORD5 0x07f10000 | |
633 | ||
634 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
635 | decides to copy as dynamic relocs in check_relocs for each symbol. |
636 | This is so that it can later discard them if they are found to be | |
637 | unnecessary. We store the information in a field extending the | |
638 | regular ELF linker hash table. */ | |
a85d7ed0 | 639 | |
0451c93c | 640 | struct elf_s390_dyn_relocs |
a85d7ed0 | 641 | { |
0451c93c MS |
642 | struct elf_s390_dyn_relocs *next; |
643 | ||
644 | /* The input section of the reloc. */ | |
645 | asection *sec; | |
646 | ||
647 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 648 | bfd_size_type count; |
0451c93c MS |
649 | |
650 | /* Number of pc-relative relocs copied for the input section. */ | |
651 | bfd_size_type pc_count; | |
a85d7ed0 NC |
652 | }; |
653 | ||
654 | /* s390 ELF linker hash entry. */ | |
655 | ||
656 | struct elf_s390_link_hash_entry | |
657 | { | |
0451c93c | 658 | struct elf_link_hash_entry elf; |
a85d7ed0 | 659 | |
0451c93c MS |
660 | /* Track dynamic relocs copied for this symbol. */ |
661 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
662 | |
663 | /* Number of GOTPLT references for a function. */ | |
664 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
665 | |
666 | #define GOT_UNKNOWN 0 | |
667 | #define GOT_NORMAL 1 | |
668 | #define GOT_TLS_GD 2 | |
669 | #define GOT_TLS_IE 3 | |
670 | #define GOT_TLS_IE_NLT 4 | |
671 | unsigned char tls_type; | |
a85d7ed0 NC |
672 | }; |
673 | ||
69fc87f1 MS |
674 | #define elf_s390_hash_entry(ent) \ |
675 | ((struct elf_s390_link_hash_entry *)(ent)) | |
676 | ||
0ffa91dd NC |
677 | /* NOTE: Keep this structure in sync with |
678 | the one declared in elf64-s390.c. */ | |
69fc87f1 MS |
679 | struct elf_s390_obj_tdata |
680 | { | |
681 | struct elf_obj_tdata root; | |
682 | ||
0ffa91dd | 683 | /* TLS type for each local got entry. */ |
69fc87f1 MS |
684 | char *local_got_tls_type; |
685 | }; | |
686 | ||
687 | #define elf_s390_tdata(abfd) \ | |
688 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
689 | ||
690 | #define elf_s390_local_got_tls_type(abfd) \ | |
691 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
692 | ||
0ffa91dd NC |
693 | #define is_s390_elf(bfd) \ |
694 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
695 | && elf_tdata (bfd) != NULL \ | |
696 | && elf_object_id (bfd) == S390_ELF_TDATA) | |
697 | ||
69fc87f1 | 698 | static bfd_boolean |
62d7a5f6 | 699 | elf_s390_mkobject (bfd *abfd) |
69fc87f1 | 700 | { |
0ffa91dd NC |
701 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), |
702 | S390_ELF_TDATA); | |
69fc87f1 MS |
703 | } |
704 | ||
705 | static bfd_boolean | |
706 | elf_s390_object_p (abfd) | |
707 | bfd *abfd; | |
708 | { | |
69fc87f1 MS |
709 | /* Set the right machine number for an s390 elf32 file. */ |
710 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); | |
711 | } | |
712 | ||
a85d7ed0 NC |
713 | /* s390 ELF linker hash table. */ |
714 | ||
715 | struct elf_s390_link_hash_table | |
716 | { | |
0451c93c | 717 | struct elf_link_hash_table elf; |
a85d7ed0 | 718 | |
0451c93c MS |
719 | /* Short-cuts to get to dynamic linker sections. */ |
720 | asection *sgot; | |
721 | asection *sgotplt; | |
722 | asection *srelgot; | |
723 | asection *splt; | |
724 | asection *srelplt; | |
725 | asection *sdynbss; | |
726 | asection *srelbss; | |
ec338859 | 727 | |
69fc87f1 MS |
728 | union { |
729 | bfd_signed_vma refcount; | |
730 | bfd_vma offset; | |
731 | } tls_ldm_got; | |
732 | ||
ec338859 AM |
733 | /* Small local sym to section mapping cache. */ |
734 | struct sym_sec_cache sym_sec; | |
0451c93c | 735 | }; |
a85d7ed0 NC |
736 | |
737 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
738 | ||
739 | #define elf_s390_hash_table(p) \ | |
740 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
741 | ||
742 | /* Create an entry in an s390 ELF linker hash table. */ | |
743 | ||
744 | static struct bfd_hash_entry * | |
0451c93c | 745 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
746 | struct bfd_hash_entry *entry; |
747 | struct bfd_hash_table *table; | |
748 | const char *string; | |
749 | { | |
a85d7ed0 NC |
750 | /* Allocate the structure if it has not already been allocated by a |
751 | subclass. */ | |
0451c93c MS |
752 | if (entry == NULL) |
753 | { | |
754 | entry = bfd_hash_allocate (table, | |
755 | sizeof (struct elf_s390_link_hash_entry)); | |
756 | if (entry == NULL) | |
757 | return entry; | |
758 | } | |
ec338859 | 759 | |
a85d7ed0 | 760 | /* Call the allocation method of the superclass. */ |
0451c93c MS |
761 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
762 | if (entry != NULL) | |
a85d7ed0 | 763 | { |
0451c93c | 764 | struct elf_s390_link_hash_entry *eh; |
ec338859 | 765 | |
0451c93c MS |
766 | eh = (struct elf_s390_link_hash_entry *) entry; |
767 | eh->dyn_relocs = NULL; | |
5236c819 | 768 | eh->gotplt_refcount = 0; |
69fc87f1 | 769 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
770 | } |
771 | ||
0451c93c | 772 | return entry; |
a85d7ed0 NC |
773 | } |
774 | ||
775 | /* Create an s390 ELF linker hash table. */ | |
776 | ||
777 | static struct bfd_link_hash_table * | |
778 | elf_s390_link_hash_table_create (abfd) | |
779 | bfd *abfd; | |
780 | { | |
781 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 782 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 783 | |
e2d34d7d | 784 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 785 | if (ret == NULL) |
a85d7ed0 NC |
786 | return NULL; |
787 | ||
66eb6687 AM |
788 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
789 | sizeof (struct elf_s390_link_hash_entry))) | |
a85d7ed0 | 790 | { |
e2d34d7d | 791 | free (ret); |
a85d7ed0 NC |
792 | return NULL; |
793 | } | |
794 | ||
0451c93c MS |
795 | ret->sgot = NULL; |
796 | ret->sgotplt = NULL; | |
797 | ret->srelgot = NULL; | |
798 | ret->splt = NULL; | |
799 | ret->srelplt = NULL; | |
800 | ret->sdynbss = NULL; | |
801 | ret->srelbss = NULL; | |
69fc87f1 | 802 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 803 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
804 | |
805 | return &ret->elf.root; | |
806 | } | |
807 | ||
808 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
809 | shortcuts to them in our hash table. */ | |
810 | ||
b34976b6 | 811 | static bfd_boolean |
0451c93c MS |
812 | create_got_section (dynobj, info) |
813 | bfd *dynobj; | |
814 | struct bfd_link_info *info; | |
815 | { | |
816 | struct elf_s390_link_hash_table *htab; | |
817 | ||
818 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 819 | return FALSE; |
0451c93c MS |
820 | |
821 | htab = elf_s390_hash_table (info); | |
822 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
823 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
824 | if (!htab->sgot || !htab->sgotplt) | |
825 | abort (); | |
826 | ||
3496cb2a L |
827 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", |
828 | (SEC_ALLOC | SEC_LOAD | |
829 | | SEC_HAS_CONTENTS | |
830 | | SEC_IN_MEMORY | |
831 | | SEC_LINKER_CREATED | |
832 | | SEC_READONLY)); | |
0451c93c | 833 | if (htab->srelgot == NULL |
0451c93c | 834 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) |
b34976b6 AM |
835 | return FALSE; |
836 | return TRUE; | |
0451c93c MS |
837 | } |
838 | ||
839 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
840 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
841 | hash table. */ | |
842 | ||
b34976b6 | 843 | static bfd_boolean |
0451c93c MS |
844 | elf_s390_create_dynamic_sections (dynobj, info) |
845 | bfd *dynobj; | |
846 | struct bfd_link_info *info; | |
847 | { | |
848 | struct elf_s390_link_hash_table *htab; | |
849 | ||
850 | htab = elf_s390_hash_table (info); | |
851 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 852 | return FALSE; |
0451c93c MS |
853 | |
854 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 855 | return FALSE; |
0451c93c MS |
856 | |
857 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
858 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
859 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
860 | if (!info->shared) | |
861 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
862 | ||
863 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
864 | || (!info->shared && !htab->srelbss)) | |
865 | abort (); | |
866 | ||
b34976b6 | 867 | return TRUE; |
a85d7ed0 NC |
868 | } |
869 | ||
0451c93c MS |
870 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
871 | ||
872 | static void | |
fcfa13d2 AM |
873 | elf_s390_copy_indirect_symbol (info, dir, ind) |
874 | struct bfd_link_info *info; | |
0451c93c MS |
875 | struct elf_link_hash_entry *dir, *ind; |
876 | { | |
877 | struct elf_s390_link_hash_entry *edir, *eind; | |
878 | ||
879 | edir = (struct elf_s390_link_hash_entry *) dir; | |
880 | eind = (struct elf_s390_link_hash_entry *) ind; | |
881 | ||
882 | if (eind->dyn_relocs != NULL) | |
883 | { | |
884 | if (edir->dyn_relocs != NULL) | |
885 | { | |
886 | struct elf_s390_dyn_relocs **pp; | |
887 | struct elf_s390_dyn_relocs *p; | |
888 | ||
fcfa13d2 | 889 | /* Add reloc counts against the indirect sym to the direct sym |
0451c93c MS |
890 | list. Merge any entries against the same section. */ |
891 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
892 | { | |
893 | struct elf_s390_dyn_relocs *q; | |
894 | ||
895 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
896 | if (q->sec == p->sec) | |
897 | { | |
898 | q->pc_count += p->pc_count; | |
899 | q->count += p->count; | |
900 | *pp = p->next; | |
901 | break; | |
902 | } | |
903 | if (q == NULL) | |
904 | pp = &p->next; | |
905 | } | |
906 | *pp = edir->dyn_relocs; | |
907 | } | |
908 | ||
909 | edir->dyn_relocs = eind->dyn_relocs; | |
910 | eind->dyn_relocs = NULL; | |
911 | } | |
912 | ||
69fc87f1 MS |
913 | if (ind->root.type == bfd_link_hash_indirect |
914 | && dir->got.refcount <= 0) | |
915 | { | |
916 | edir->tls_type = eind->tls_type; | |
917 | eind->tls_type = GOT_UNKNOWN; | |
918 | } | |
919 | ||
64285810 MS |
920 | if (ELIMINATE_COPY_RELOCS |
921 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
922 | && dir->dynamic_adjusted) |
923 | { | |
924 | /* If called to transfer flags for a weakdef during processing | |
925 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
926 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
927 | dir->ref_dynamic |= ind->ref_dynamic; | |
928 | dir->ref_regular |= ind->ref_regular; | |
929 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
930 | dir->needs_plt |= ind->needs_plt; | |
931 | } | |
64285810 | 932 | else |
fcfa13d2 | 933 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
0451c93c | 934 | } |
a85d7ed0 | 935 | |
69fc87f1 MS |
936 | static int |
937 | elf_s390_tls_transition (info, r_type, is_local) | |
938 | struct bfd_link_info *info; | |
939 | int r_type; | |
940 | int is_local; | |
941 | { | |
942 | if (info->shared) | |
943 | return r_type; | |
944 | ||
945 | switch (r_type) | |
946 | { | |
947 | case R_390_TLS_GD32: | |
948 | case R_390_TLS_IE32: | |
949 | if (is_local) | |
950 | return R_390_TLS_LE32; | |
951 | return R_390_TLS_IE32; | |
952 | case R_390_TLS_GOTIE32: | |
953 | if (is_local) | |
954 | return R_390_TLS_LE32; | |
955 | return R_390_TLS_GOTIE32; | |
956 | case R_390_TLS_LDM32: | |
957 | return R_390_TLS_LE32; | |
958 | } | |
959 | ||
960 | return r_type; | |
961 | } | |
962 | ||
a85d7ed0 NC |
963 | /* Look through the relocs for a section during the first phase, and |
964 | allocate space in the global offset table or procedure linkage | |
965 | table. */ | |
966 | ||
b34976b6 | 967 | static bfd_boolean |
a85d7ed0 NC |
968 | elf_s390_check_relocs (abfd, info, sec, relocs) |
969 | bfd *abfd; | |
970 | struct bfd_link_info *info; | |
971 | asection *sec; | |
972 | const Elf_Internal_Rela *relocs; | |
973 | { | |
0451c93c | 974 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
975 | Elf_Internal_Shdr *symtab_hdr; |
976 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
977 | const Elf_Internal_Rela *rel; |
978 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 979 | asection *sreloc; |
5236c819 | 980 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 981 | int tls_type, old_tls_type; |
a85d7ed0 | 982 | |
1049f94e | 983 | if (info->relocatable) |
b34976b6 | 984 | return TRUE; |
a85d7ed0 | 985 | |
0ffa91dd NC |
986 | BFD_ASSERT (is_s390_elf (abfd)); |
987 | ||
0451c93c | 988 | htab = elf_s390_hash_table (info); |
0ffa91dd | 989 | symtab_hdr = &elf_symtab_hdr (abfd); |
a85d7ed0 | 990 | sym_hashes = elf_sym_hashes (abfd); |
5236c819 | 991 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 992 | |
a85d7ed0 NC |
993 | sreloc = NULL; |
994 | ||
995 | rel_end = relocs + sec->reloc_count; | |
996 | for (rel = relocs; rel < rel_end; rel++) | |
997 | { | |
69fc87f1 | 998 | unsigned int r_type; |
a85d7ed0 NC |
999 | unsigned long r_symndx; |
1000 | struct elf_link_hash_entry *h; | |
1001 | ||
1002 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1003 | ||
0451c93c MS |
1004 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
1005 | { | |
d003868e AM |
1006 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1007 | abfd, r_symndx); | |
b34976b6 | 1008 | return FALSE; |
0451c93c MS |
1009 | } |
1010 | ||
a85d7ed0 NC |
1011 | if (r_symndx < symtab_hdr->sh_info) |
1012 | h = NULL; | |
1013 | else | |
973a3492 L |
1014 | { |
1015 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1016 | while (h->root.type == bfd_link_hash_indirect | |
1017 | || h->root.type == bfd_link_hash_warning) | |
1018 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1019 | } | |
a85d7ed0 | 1020 | |
5236c819 MS |
1021 | /* Create got section and local_got_refcounts array if they |
1022 | are needed. */ | |
69fc87f1 MS |
1023 | r_type = elf_s390_tls_transition (info, |
1024 | ELF32_R_TYPE (rel->r_info), | |
1025 | h == NULL); | |
1026 | switch (r_type) | |
a85d7ed0 NC |
1027 | { |
1028 | case R_390_GOT12: | |
5236c819 | 1029 | case R_390_GOT16: |
bd1ea41b | 1030 | case R_390_GOT20: |
a85d7ed0 | 1031 | case R_390_GOT32: |
befc3abb | 1032 | case R_390_GOTENT: |
5236c819 MS |
1033 | case R_390_GOTPLT12: |
1034 | case R_390_GOTPLT16: | |
bd1ea41b | 1035 | case R_390_GOTPLT20: |
5236c819 MS |
1036 | case R_390_GOTPLT32: |
1037 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
1038 | case R_390_TLS_GD32: |
1039 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1040 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1041 | case R_390_TLS_GOTIE32: |
1042 | case R_390_TLS_IEENT: | |
1043 | case R_390_TLS_IE32: | |
1044 | case R_390_TLS_LDM32: | |
5236c819 MS |
1045 | if (h == NULL |
1046 | && local_got_refcounts == NULL) | |
a85d7ed0 | 1047 | { |
5236c819 | 1048 | bfd_size_type size; |
26e41594 | 1049 | |
5236c819 | 1050 | size = symtab_hdr->sh_info; |
69fc87f1 | 1051 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
1052 | local_got_refcounts = ((bfd_signed_vma *) |
1053 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 1054 | if (local_got_refcounts == NULL) |
5236c819 MS |
1055 | return FALSE; |
1056 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
1057 | elf_s390_local_got_tls_type (abfd) |
1058 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 1059 | } |
5236c819 MS |
1060 | /* Fall through. */ |
1061 | case R_390_GOTOFF16: | |
1062 | case R_390_GOTOFF32: | |
0451c93c | 1063 | case R_390_GOTPC: |
befc3abb | 1064 | case R_390_GOTPCDBL: |
0451c93c MS |
1065 | if (htab->sgot == NULL) |
1066 | { | |
1067 | if (htab->elf.dynobj == NULL) | |
1068 | htab->elf.dynobj = abfd; | |
1069 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1070 | return FALSE; |
0451c93c | 1071 | } |
5236c819 MS |
1072 | } |
1073 | ||
69fc87f1 | 1074 | switch (r_type) |
5236c819 | 1075 | { |
5236c819 MS |
1076 | case R_390_GOTOFF16: |
1077 | case R_390_GOTOFF32: | |
1078 | case R_390_GOTPC: | |
1079 | case R_390_GOTPCDBL: | |
1080 | /* Got is created, nothing to be done. */ | |
a85d7ed0 NC |
1081 | break; |
1082 | ||
26e41594 AM |
1083 | case R_390_PLT16DBL: |
1084 | case R_390_PLT32DBL: | |
a85d7ed0 | 1085 | case R_390_PLT32: |
5236c819 MS |
1086 | case R_390_PLTOFF16: |
1087 | case R_390_PLTOFF32: | |
a85d7ed0 | 1088 | /* This symbol requires a procedure linkage table entry. We |
26e41594 AM |
1089 | actually build the entry in adjust_dynamic_symbol, |
1090 | because this might be a case of linking PIC code which is | |
1091 | never referenced by a dynamic object, in which case we | |
1092 | don't need to generate a procedure linkage table entry | |
1093 | after all. */ | |
a85d7ed0 NC |
1094 | |
1095 | /* If this is a local symbol, we resolve it directly without | |
26e41594 | 1096 | creating a procedure linkage table entry. */ |
5236c819 MS |
1097 | if (h != NULL) |
1098 | { | |
f5385ebf | 1099 | h->needs_plt = 1; |
5236c819 MS |
1100 | h->plt.refcount += 1; |
1101 | } | |
1102 | break; | |
a85d7ed0 | 1103 | |
5236c819 MS |
1104 | case R_390_GOTPLT12: |
1105 | case R_390_GOTPLT16: | |
bd1ea41b | 1106 | case R_390_GOTPLT20: |
5236c819 MS |
1107 | case R_390_GOTPLT32: |
1108 | case R_390_GOTPLTENT: | |
1109 | /* This symbol requires either a procedure linkage table entry | |
1110 | or an entry in the local got. We actually build the entry | |
1111 | in adjust_dynamic_symbol because whether this is really a | |
1112 | global reference can change and with it the fact if we have | |
1113 | to create a plt entry or a local got entry. To be able to | |
1114 | make a once global symbol a local one we have to keep track | |
1115 | of the number of gotplt references that exist for this | |
1116 | symbol. */ | |
1117 | if (h != NULL) | |
1118 | { | |
1119 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
f5385ebf | 1120 | h->needs_plt = 1; |
5236c819 MS |
1121 | h->plt.refcount += 1; |
1122 | } | |
1123 | else | |
1124 | local_got_refcounts[r_symndx] += 1; | |
a85d7ed0 NC |
1125 | break; |
1126 | ||
69fc87f1 MS |
1127 | case R_390_TLS_LDM32: |
1128 | htab->tls_ldm_got.refcount += 1; | |
1129 | break; | |
1130 | ||
1131 | case R_390_TLS_IE32: | |
1132 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1133 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1134 | case R_390_TLS_GOTIE32: |
1135 | case R_390_TLS_IEENT: | |
1136 | if (info->shared) | |
1137 | info->flags |= DF_STATIC_TLS; | |
ae9a127f | 1138 | /* Fall through. */ |
69fc87f1 MS |
1139 | |
1140 | case R_390_GOT12: | |
26e41594 | 1141 | case R_390_GOT16: |
bd1ea41b | 1142 | case R_390_GOT20: |
69fc87f1 MS |
1143 | case R_390_GOT32: |
1144 | case R_390_GOTENT: | |
1145 | case R_390_TLS_GD32: | |
1146 | /* This symbol requires a global offset table entry. */ | |
1147 | switch (r_type) | |
1148 | { | |
1149 | default: | |
1150 | case R_390_GOT12: | |
1151 | case R_390_GOT16: | |
bd1ea41b | 1152 | case R_390_GOT20: |
69fc87f1 MS |
1153 | case R_390_GOT32: |
1154 | case R_390_GOTENT: | |
1155 | tls_type = GOT_NORMAL; | |
1156 | break; | |
1157 | case R_390_TLS_GD32: | |
1158 | tls_type = GOT_TLS_GD; | |
1159 | break; | |
1160 | case R_390_TLS_IE32: | |
1161 | case R_390_TLS_GOTIE32: | |
1162 | tls_type = GOT_TLS_IE; | |
1163 | break; | |
1164 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1165 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1166 | case R_390_TLS_IEENT: |
1167 | tls_type = GOT_TLS_IE_NLT; | |
1168 | break; | |
1169 | } | |
1170 | ||
1171 | if (h != NULL) | |
1172 | { | |
1173 | h->got.refcount += 1; | |
1174 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1175 | } | |
1176 | else | |
1177 | { | |
1178 | local_got_refcounts[r_symndx] += 1; | |
1179 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; | |
1180 | } | |
1181 | /* If a TLS symbol is accessed using IE at least once, | |
1182 | there is no point to use dynamic model for it. */ | |
1183 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1184 | { | |
1185 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1186 | { | |
1187 | (*_bfd_error_handler) | |
d003868e AM |
1188 | (_("%B: `%s' accessed both as normal and thread local symbol"), |
1189 | abfd, h->root.root.string); | |
69fc87f1 MS |
1190 | return FALSE; |
1191 | } | |
1192 | if (old_tls_type > tls_type) | |
1193 | tls_type = old_tls_type; | |
1194 | } | |
1195 | ||
1196 | if (old_tls_type != tls_type) | |
1197 | { | |
1198 | if (h != NULL) | |
1199 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1200 | else | |
1201 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1202 | } | |
1203 | ||
1204 | if (r_type != R_390_TLS_IE32) | |
1205 | break; | |
ae9a127f | 1206 | /* Fall through. */ |
69fc87f1 MS |
1207 | |
1208 | case R_390_TLS_LE32: | |
1209 | if (!info->shared) | |
1210 | break; | |
1211 | info->flags |= DF_STATIC_TLS; | |
ae9a127f | 1212 | /* Fall through. */ |
69fc87f1 | 1213 | |
26e41594 AM |
1214 | case R_390_8: |
1215 | case R_390_16: | |
a85d7ed0 | 1216 | case R_390_32: |
26e41594 AM |
1217 | case R_390_PC16: |
1218 | case R_390_PC16DBL: | |
befc3abb | 1219 | case R_390_PC32DBL: |
a85d7ed0 | 1220 | case R_390_PC32: |
0451c93c MS |
1221 | if (h != NULL && !info->shared) |
1222 | { | |
1223 | /* If this reloc is in a read-only section, we might | |
1224 | need a copy reloc. We can't check reliably at this | |
1225 | stage whether the section is read-only, as input | |
1226 | sections have not yet been mapped to output sections. | |
1227 | Tentatively set the flag for now, and correct in | |
1228 | adjust_dynamic_symbol. */ | |
f5385ebf | 1229 | h->non_got_ref = 1; |
ec338859 | 1230 | |
0451c93c MS |
1231 | /* We may need a .plt entry if the function this reloc |
1232 | refers to is in a shared lib. */ | |
1233 | h->plt.refcount += 1; | |
1234 | } | |
a85d7ed0 NC |
1235 | |
1236 | /* If we are creating a shared library, and this is a reloc | |
0451c93c MS |
1237 | against a global symbol, or a non PC relative reloc |
1238 | against a local symbol, then we need to copy the reloc | |
1239 | into the shared library. However, if we are linking with | |
1240 | -Bsymbolic, we do not need to copy a reloc against a | |
1241 | global symbol which is defined in an object we are | |
1242 | including in the link (i.e., DEF_REGULAR is set). At | |
1243 | this point we have not seen all the input files, so it is | |
1244 | possible that DEF_REGULAR is not set now but will be set | |
1245 | later (it is never cleared). In case of a weak definition, | |
1246 | DEF_REGULAR may be cleared later by a strong definition in | |
1247 | a shared library. We account for that possibility below by | |
1248 | storing information in the relocs_copied field of the hash | |
1249 | table entry. A similar situation occurs when creating | |
1250 | shared libraries and symbol visibility changes render the | |
1251 | symbol local. | |
1252 | ||
1253 | If on the other hand, we are creating an executable, we | |
1254 | may need to keep relocations for symbols satisfied by a | |
1255 | dynamic library if we manage to avoid copy relocs for the | |
1256 | symbol. */ | |
1257 | if ((info->shared | |
1258 | && (sec->flags & SEC_ALLOC) != 0 | |
ec338859 | 1259 | && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 |
0451c93c | 1260 | && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL |
befc3abb | 1261 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL |
0451c93c MS |
1262 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32) |
1263 | || (h != NULL | |
8c21ca21 | 1264 | && (! SYMBOLIC_BIND (info, h) |
0451c93c | 1265 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1266 | || !h->def_regular)))) |
64285810 MS |
1267 | || (ELIMINATE_COPY_RELOCS |
1268 | && !info->shared | |
0451c93c MS |
1269 | && (sec->flags & SEC_ALLOC) != 0 |
1270 | && h != NULL | |
1271 | && (h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1272 | || !h->def_regular))) |
a85d7ed0 | 1273 | { |
ec338859 AM |
1274 | struct elf_s390_dyn_relocs *p; |
1275 | struct elf_s390_dyn_relocs **head; | |
1276 | ||
0451c93c MS |
1277 | /* We must copy these reloc types into the output file. |
1278 | Create a reloc section in dynobj and make room for | |
1279 | this reloc. */ | |
a85d7ed0 NC |
1280 | if (sreloc == NULL) |
1281 | { | |
0451c93c MS |
1282 | if (htab->elf.dynobj == NULL) |
1283 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1284 | |
83bac4b0 NC |
1285 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1286 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); | |
1287 | ||
a85d7ed0 | 1288 | if (sreloc == NULL) |
83bac4b0 | 1289 | return FALSE; |
a85d7ed0 NC |
1290 | } |
1291 | ||
0451c93c MS |
1292 | /* If this is a global symbol, we count the number of |
1293 | relocations we need for this symbol. */ | |
1294 | if (h != NULL) | |
a85d7ed0 | 1295 | { |
ec338859 | 1296 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1297 | } |
1298 | else | |
1299 | { | |
ec338859 AM |
1300 | /* Track dynamic relocs needed for local syms too. |
1301 | We really need local syms available to do this | |
1302 | easily. Oh well. */ | |
ec338859 | 1303 | asection *s; |
6edfbbad | 1304 | void *vpp; |
ae9a127f | 1305 | |
ec338859 AM |
1306 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
1307 | sec, r_symndx); | |
1308 | if (s == NULL) | |
b34976b6 | 1309 | return FALSE; |
ec338859 | 1310 | |
6edfbbad DJ |
1311 | vpp = &elf_section_data (s)->local_dynrel; |
1312 | head = (struct elf_s390_dyn_relocs **) vpp; | |
ec338859 AM |
1313 | } |
1314 | ||
1315 | p = *head; | |
1316 | if (p == NULL || p->sec != sec) | |
1317 | { | |
1318 | bfd_size_type amt = sizeof *p; | |
ae9a127f | 1319 | |
ec338859 AM |
1320 | p = ((struct elf_s390_dyn_relocs *) |
1321 | bfd_alloc (htab->elf.dynobj, amt)); | |
1322 | if (p == NULL) | |
b34976b6 | 1323 | return FALSE; |
ec338859 AM |
1324 | p->next = *head; |
1325 | *head = p; | |
1326 | p->sec = sec; | |
1327 | p->count = 0; | |
1328 | p->pc_count = 0; | |
a85d7ed0 | 1329 | } |
ec338859 AM |
1330 | |
1331 | p->count += 1; | |
1332 | if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 | |
1333 | || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL | |
befc3abb | 1334 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL |
ec338859 AM |
1335 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32) |
1336 | p->pc_count += 1; | |
a85d7ed0 | 1337 | } |
a85d7ed0 | 1338 | break; |
ec338859 | 1339 | |
a85d7ed0 NC |
1340 | /* This relocation describes the C++ object vtable hierarchy. |
1341 | Reconstruct it for later use during GC. */ | |
26e41594 | 1342 | case R_390_GNU_VTINHERIT: |
c152c796 | 1343 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
26e41594 AM |
1344 | return FALSE; |
1345 | break; | |
ec338859 | 1346 | |
a85d7ed0 NC |
1347 | /* This relocation describes which C++ vtable entries are actually |
1348 | used. Record for later use during GC. */ | |
26e41594 | 1349 | case R_390_GNU_VTENTRY: |
d17e0c6e JB |
1350 | BFD_ASSERT (h != NULL); |
1351 | if (h != NULL | |
1352 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
26e41594 AM |
1353 | return FALSE; |
1354 | break; | |
ec338859 | 1355 | |
a85d7ed0 NC |
1356 | default: |
1357 | break; | |
1358 | } | |
1359 | } | |
1360 | ||
b34976b6 | 1361 | return TRUE; |
a85d7ed0 NC |
1362 | } |
1363 | ||
1364 | /* Return the section that should be marked against GC for a given | |
1365 | relocation. */ | |
1366 | ||
1367 | static asection * | |
07adf181 AM |
1368 | elf_s390_gc_mark_hook (asection *sec, |
1369 | struct bfd_link_info *info, | |
1370 | Elf_Internal_Rela *rel, | |
1371 | struct elf_link_hash_entry *h, | |
1372 | Elf_Internal_Sym *sym) | |
a85d7ed0 NC |
1373 | { |
1374 | if (h != NULL) | |
07adf181 AM |
1375 | switch (ELF32_R_TYPE (rel->r_info)) |
1376 | { | |
1377 | case R_390_GNU_VTINHERIT: | |
1378 | case R_390_GNU_VTENTRY: | |
1379 | return NULL; | |
1380 | } | |
1381 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
a85d7ed0 | 1382 | |
a85d7ed0 NC |
1383 | } |
1384 | ||
1385 | /* Update the got entry reference counts for the section being removed. */ | |
1386 | ||
b34976b6 | 1387 | static bfd_boolean |
07adf181 AM |
1388 | elf_s390_gc_sweep_hook (bfd *abfd, |
1389 | struct bfd_link_info *info, | |
1390 | asection *sec, | |
1391 | const Elf_Internal_Rela *relocs) | |
a85d7ed0 NC |
1392 | { |
1393 | Elf_Internal_Shdr *symtab_hdr; | |
1394 | struct elf_link_hash_entry **sym_hashes; | |
1395 | bfd_signed_vma *local_got_refcounts; | |
1396 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1397 | |
7dda2462 TG |
1398 | if (info->relocatable) |
1399 | return TRUE; | |
1400 | ||
ec338859 | 1401 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1402 | |
0ffa91dd | 1403 | symtab_hdr = &elf_symtab_hdr (abfd); |
0451c93c MS |
1404 | sym_hashes = elf_sym_hashes (abfd); |
1405 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1406 | |
1407 | relend = relocs + sec->reloc_count; | |
1408 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1409 | { |
26e41594 AM |
1410 | unsigned long r_symndx; |
1411 | unsigned int r_type; | |
1412 | struct elf_link_hash_entry *h = NULL; | |
1413 | ||
5236c819 | 1414 | r_symndx = ELF32_R_SYM (rel->r_info); |
26e41594 AM |
1415 | if (r_symndx >= symtab_hdr->sh_info) |
1416 | { | |
1417 | struct elf_s390_link_hash_entry *eh; | |
1418 | struct elf_s390_dyn_relocs **pp; | |
1419 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1420 | |
26e41594 | 1421 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1422 | while (h->root.type == bfd_link_hash_indirect |
1423 | || h->root.type == bfd_link_hash_warning) | |
1424 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1425 | eh = (struct elf_s390_link_hash_entry *) h; |
5236c819 | 1426 | |
26e41594 AM |
1427 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1428 | if (p->sec == sec) | |
1429 | { | |
1430 | /* Everything must go for SEC. */ | |
1431 | *pp = p->next; | |
1432 | break; | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | r_type = ELF32_R_TYPE (rel->r_info); | |
1437 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1438 | switch (r_type) |
5236c819 | 1439 | { |
69fc87f1 MS |
1440 | case R_390_TLS_LDM32: |
1441 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1442 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1443 | break; | |
1444 | ||
1445 | case R_390_TLS_GD32: | |
1446 | case R_390_TLS_IE32: | |
1447 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1448 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1449 | case R_390_TLS_GOTIE32: |
1450 | case R_390_TLS_IEENT: | |
5236c819 MS |
1451 | case R_390_GOT12: |
1452 | case R_390_GOT16: | |
bd1ea41b | 1453 | case R_390_GOT20: |
5236c819 MS |
1454 | case R_390_GOT32: |
1455 | case R_390_GOTOFF16: | |
1456 | case R_390_GOTOFF32: | |
1457 | case R_390_GOTPC: | |
1458 | case R_390_GOTPCDBL: | |
1459 | case R_390_GOTENT: | |
1460 | if (h != NULL) | |
1461 | { | |
1462 | if (h->got.refcount > 0) | |
1463 | h->got.refcount -= 1; | |
1464 | } | |
1465 | else if (local_got_refcounts != NULL) | |
1466 | { | |
1467 | if (local_got_refcounts[r_symndx] > 0) | |
1468 | local_got_refcounts[r_symndx] -= 1; | |
1469 | } | |
26e41594 | 1470 | break; |
a85d7ed0 | 1471 | |
5236c819 MS |
1472 | case R_390_8: |
1473 | case R_390_12: | |
1474 | case R_390_16: | |
bd1ea41b | 1475 | case R_390_20: |
5236c819 MS |
1476 | case R_390_32: |
1477 | case R_390_PC16: | |
1478 | case R_390_PC16DBL: | |
1479 | case R_390_PC32DBL: | |
1480 | case R_390_PC32: | |
26e41594 AM |
1481 | if (info->shared) |
1482 | break; | |
1483 | /* Fall through. */ | |
1484 | ||
69fc87f1 MS |
1485 | case R_390_PLT16DBL: |
1486 | case R_390_PLT32DBL: | |
1487 | case R_390_PLT32: | |
1488 | case R_390_PLTOFF16: | |
1489 | case R_390_PLTOFF32: | |
1490 | if (h != NULL) | |
1491 | { | |
1492 | if (h->plt.refcount > 0) | |
1493 | h->plt.refcount -= 1; | |
1494 | } | |
1495 | break; | |
1496 | ||
1497 | case R_390_GOTPLT12: | |
1498 | case R_390_GOTPLT16: | |
bd1ea41b | 1499 | case R_390_GOTPLT20: |
69fc87f1 MS |
1500 | case R_390_GOTPLT32: |
1501 | case R_390_GOTPLTENT: | |
1502 | if (h != NULL) | |
1503 | { | |
1504 | if (h->plt.refcount > 0) | |
1505 | { | |
1506 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1507 | h->plt.refcount -= 1; | |
1508 | } | |
1509 | } | |
1510 | else if (local_got_refcounts != NULL) | |
1511 | { | |
1512 | if (local_got_refcounts[r_symndx] > 0) | |
1513 | local_got_refcounts[r_symndx] -= 1; | |
1514 | } | |
1515 | break; | |
1516 | ||
5236c819 MS |
1517 | default: |
1518 | break; | |
1519 | } | |
1520 | } | |
a85d7ed0 | 1521 | |
b34976b6 | 1522 | return TRUE; |
a85d7ed0 NC |
1523 | } |
1524 | ||
5236c819 MS |
1525 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1526 | entry but we found we will not create any. Called when we find we will | |
1527 | not have any PLT for this symbol, by for example | |
1528 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1529 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1530 | created (we're only linking static objects). */ | |
1531 | ||
1532 | static void | |
1533 | elf_s390_adjust_gotplt (h) | |
1534 | struct elf_s390_link_hash_entry *h; | |
1535 | { | |
1536 | if (h->elf.root.type == bfd_link_hash_warning) | |
1537 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1538 | ||
1539 | if (h->gotplt_refcount <= 0) | |
1540 | return; | |
1541 | ||
1542 | /* We simply add the number of gotplt references to the number | |
1543 | * of got references for this symbol. */ | |
1544 | h->elf.got.refcount += h->gotplt_refcount; | |
1545 | h->gotplt_refcount = -1; | |
1546 | } | |
1547 | ||
a85d7ed0 NC |
1548 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1549 | regular object. The current definition is in some section of the | |
1550 | dynamic object, but we're not including those sections. We have to | |
1551 | change the definition to something the rest of the link can | |
1552 | understand. */ | |
1553 | ||
b34976b6 | 1554 | static bfd_boolean |
a85d7ed0 NC |
1555 | elf_s390_adjust_dynamic_symbol (info, h) |
1556 | struct bfd_link_info *info; | |
1557 | struct elf_link_hash_entry *h; | |
1558 | { | |
0451c93c | 1559 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 | 1560 | asection *s; |
a85d7ed0 | 1561 | |
a85d7ed0 NC |
1562 | /* If this is a function, put it in the procedure linkage table. We |
1563 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1564 | (although we could actually do it here). */ |
a85d7ed0 | 1565 | if (h->type == STT_FUNC |
f5385ebf | 1566 | || h->needs_plt) |
a85d7ed0 | 1567 | { |
0451c93c | 1568 | if (h->plt.refcount <= 0 |
8c21ca21 AK |
1569 | || SYMBOL_CALLS_LOCAL (info, h) |
1570 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1571 | && h->root.type != bfd_link_hash_undefweak)) | |
a85d7ed0 NC |
1572 | { |
1573 | /* This case can occur if we saw a PLT32 reloc in an input | |
26e41594 AM |
1574 | file, but the symbol was never referred to by a dynamic |
1575 | object, or if all references were garbage collected. In | |
a85d7ed0 NC |
1576 | such a case, we don't actually need to build a procedure |
1577 | linkage table, and we can just do a PC32 reloc instead. */ | |
1578 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1579 | h->needs_plt = 0; |
5236c819 | 1580 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1581 | } |
1582 | ||
b34976b6 | 1583 | return TRUE; |
a85d7ed0 | 1584 | } |
bbd7ec4a | 1585 | else |
0451c93c MS |
1586 | /* It's possible that we incorrectly decided a .plt reloc was |
1587 | needed for an R_390_PC32 reloc to a non-function sym in | |
1588 | check_relocs. We can't decide accurately between function and | |
1589 | non-function syms in check-relocs; Objects loaded later in | |
1590 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1591 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1592 | |
1593 | /* If this is a weak symbol, and there is a real definition, the | |
1594 | processor independent code will have arranged for us to see the | |
1595 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 1596 | if (h->u.weakdef != NULL) |
a85d7ed0 | 1597 | { |
f6e332e6 AM |
1598 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1599 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1600 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1601 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
64285810 | 1602 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1603 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1604 | return TRUE; |
a85d7ed0 NC |
1605 | } |
1606 | ||
1607 | /* This is a reference to a symbol defined by a dynamic object which | |
1608 | is not a function. */ | |
1609 | ||
1610 | /* If we are creating a shared library, we must presume that the | |
1611 | only references to the symbol are via the global offset table. | |
1612 | For such cases we need not do anything here; the relocations will | |
1613 | be handled correctly by relocate_section. */ | |
1614 | if (info->shared) | |
b34976b6 | 1615 | return TRUE; |
a85d7ed0 NC |
1616 | |
1617 | /* If there are no references to this symbol that do not use the | |
1618 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1619 | if (!h->non_got_ref) |
b34976b6 | 1620 | return TRUE; |
a85d7ed0 | 1621 | |
0451c93c MS |
1622 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1623 | if (info->nocopyreloc) | |
1624 | { | |
f5385ebf | 1625 | h->non_got_ref = 0; |
b34976b6 | 1626 | return TRUE; |
0451c93c MS |
1627 | } |
1628 | ||
64285810 | 1629 | if (ELIMINATE_COPY_RELOCS) |
0451c93c | 1630 | { |
64285810 MS |
1631 | struct elf_s390_link_hash_entry * eh; |
1632 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1633 | |
64285810 MS |
1634 | eh = (struct elf_s390_link_hash_entry *) h; |
1635 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1636 | { | |
1637 | s = p->sec->output_section; | |
1638 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1639 | break; | |
1640 | } | |
1641 | ||
1642 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1643 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1644 | if (p == NULL) | |
1645 | { | |
f5385ebf | 1646 | h->non_got_ref = 0; |
64285810 MS |
1647 | return TRUE; |
1648 | } | |
0451c93c MS |
1649 | } |
1650 | ||
909272ee AM |
1651 | if (h->size == 0) |
1652 | { | |
1653 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1654 | h->root.root.string); | |
1655 | return TRUE; | |
1656 | } | |
1657 | ||
a85d7ed0 NC |
1658 | /* We must allocate the symbol in our .dynbss section, which will |
1659 | become part of the .bss section of the executable. There will be | |
1660 | an entry for this symbol in the .dynsym section. The dynamic | |
1661 | object will contain position independent code, so all references | |
1662 | from the dynamic object to this symbol will go through the global | |
1663 | offset table. The dynamic linker will use the .dynsym entry to | |
1664 | determine the address it must put in the global offset table, so | |
1665 | both the dynamic object and the regular object will refer to the | |
1666 | same memory location for the variable. */ | |
1667 | ||
0451c93c | 1668 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1669 | |
0451c93c MS |
1670 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1671 | copy the initial value out of the dynamic object and into the | |
1672 | runtime process image. */ | |
a85d7ed0 NC |
1673 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1674 | { | |
eea6121a | 1675 | htab->srelbss->size += sizeof (Elf32_External_Rela); |
f5385ebf | 1676 | h->needs_copy = 1; |
a85d7ed0 NC |
1677 | } |
1678 | ||
0451c93c | 1679 | s = htab->sdynbss; |
a85d7ed0 | 1680 | |
027297b7 | 1681 | return _bfd_elf_adjust_dynamic_copy (h, s); |
a85d7ed0 NC |
1682 | } |
1683 | ||
0451c93c MS |
1684 | /* Allocate space in .plt, .got and associated reloc sections for |
1685 | dynamic relocs. */ | |
1686 | ||
b34976b6 | 1687 | static bfd_boolean |
0451c93c MS |
1688 | allocate_dynrelocs (h, inf) |
1689 | struct elf_link_hash_entry *h; | |
1690 | PTR inf; | |
1691 | { | |
1692 | struct bfd_link_info *info; | |
1693 | struct elf_s390_link_hash_table *htab; | |
1694 | struct elf_s390_link_hash_entry *eh; | |
1695 | struct elf_s390_dyn_relocs *p; | |
1696 | ||
e92d460e | 1697 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1698 | return TRUE; |
0451c93c | 1699 | |
e92d460e | 1700 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1701 | /* When warning symbols are created, they **replace** the "real" |
1702 | entry in the hash table, thus we never get to see the real | |
1703 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1704 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1705 | ||
0451c93c MS |
1706 | info = (struct bfd_link_info *) inf; |
1707 | htab = elf_s390_hash_table (info); | |
1708 | ||
1709 | if (htab->elf.dynamic_sections_created | |
8c21ca21 | 1710 | && h->plt.refcount > 0) |
0451c93c MS |
1711 | { |
1712 | /* Make sure this symbol is output as a dynamic symbol. | |
1713 | Undefined weak syms won't yet be marked as dynamic. */ | |
1714 | if (h->dynindx == -1 | |
f5385ebf | 1715 | && !h->forced_local) |
0451c93c | 1716 | { |
c152c796 | 1717 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1718 | return FALSE; |
0451c93c MS |
1719 | } |
1720 | ||
82058a73 | 1721 | if (info->shared |
4ec72bde | 1722 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
0451c93c MS |
1723 | { |
1724 | asection *s = htab->splt; | |
1725 | ||
1726 | /* If this is the first .plt entry, make room for the special | |
1727 | first entry. */ | |
eea6121a AM |
1728 | if (s->size == 0) |
1729 | s->size += PLT_FIRST_ENTRY_SIZE; | |
0451c93c | 1730 | |
eea6121a | 1731 | h->plt.offset = s->size; |
0451c93c MS |
1732 | |
1733 | /* If this symbol is not defined in a regular file, and we are | |
1734 | not generating a shared library, then set the symbol to this | |
1735 | location in the .plt. This is required to make function | |
1736 | pointers compare as equal between the normal executable and | |
1737 | the shared library. */ | |
1738 | if (! info->shared | |
f5385ebf | 1739 | && !h->def_regular) |
0451c93c MS |
1740 | { |
1741 | h->root.u.def.section = s; | |
1742 | h->root.u.def.value = h->plt.offset; | |
1743 | } | |
ec338859 | 1744 | |
0451c93c | 1745 | /* Make room for this entry. */ |
eea6121a | 1746 | s->size += PLT_ENTRY_SIZE; |
ec338859 | 1747 | |
0451c93c MS |
1748 | /* We also need to make an entry in the .got.plt section, which |
1749 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1750 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
0451c93c MS |
1751 | |
1752 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1753 | htab->srelplt->size += sizeof (Elf32_External_Rela); |
0451c93c MS |
1754 | } |
1755 | else | |
1756 | { | |
1757 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1758 | h->needs_plt = 0; |
5236c819 | 1759 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c | 1760 | } |
ec338859 | 1761 | } |
0451c93c MS |
1762 | else |
1763 | { | |
1764 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1765 | h->needs_plt = 0; |
5236c819 | 1766 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
ec338859 AM |
1767 | } |
1768 | ||
69fc87f1 MS |
1769 | /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to |
1770 | the binary, we can optimize a bit. IE32 and GOTIE32 get converted | |
1771 | to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT | |
1772 | we can save the dynamic TLS relocation. */ | |
1773 | if (h->got.refcount > 0 | |
1774 | && !info->shared | |
1775 | && h->dynindx == -1 | |
1776 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
0451c93c | 1777 | { |
69fc87f1 MS |
1778 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) |
1779 | /* For the GOTIE access without a literal pool entry the offset has | |
1780 | to be stored somewhere. The immediate value in the instruction | |
1781 | is not bit enough so the value is stored in the got. */ | |
1782 | { | |
eea6121a AM |
1783 | h->got.offset = htab->sgot->size; |
1784 | htab->sgot->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1785 | } |
1786 | else | |
1787 | h->got.offset = (bfd_vma) -1; | |
1788 | } | |
1789 | else if (h->got.refcount > 0) | |
1790 | { | |
0451c93c | 1791 | asection *s; |
b34976b6 | 1792 | bfd_boolean dyn; |
69fc87f1 | 1793 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1794 | |
1795 | /* Make sure this symbol is output as a dynamic symbol. | |
1796 | Undefined weak syms won't yet be marked as dynamic. */ | |
1797 | if (h->dynindx == -1 | |
f5385ebf | 1798 | && !h->forced_local) |
0451c93c | 1799 | { |
c152c796 | 1800 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1801 | return FALSE; |
0451c93c MS |
1802 | } |
1803 | ||
1804 | s = htab->sgot; | |
eea6121a AM |
1805 | h->got.offset = s->size; |
1806 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1807 | /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ |
1808 | if (tls_type == GOT_TLS_GD) | |
eea6121a | 1809 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 1810 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1811 | /* R_390_TLS_IE32 needs one dynamic relocation, |
1812 | R_390_TLS_GD32 needs one if local symbol and two if global. */ | |
1813 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1814 | || tls_type >= GOT_TLS_IE) | |
eea6121a | 1815 | htab->srelgot->size += sizeof (Elf32_External_Rela); |
69fc87f1 | 1816 | else if (tls_type == GOT_TLS_GD) |
eea6121a | 1817 | htab->srelgot->size += 2 * sizeof (Elf32_External_Rela); |
82058a73 MS |
1818 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1819 | || h->root.type != bfd_link_hash_undefweak) | |
1820 | && (info->shared | |
1821 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1822 | htab->srelgot->size += sizeof (Elf32_External_Rela); |
0451c93c MS |
1823 | } |
1824 | else | |
1825 | h->got.offset = (bfd_vma) -1; | |
1826 | ||
1827 | eh = (struct elf_s390_link_hash_entry *) h; | |
1828 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1829 | return TRUE; |
0451c93c MS |
1830 | |
1831 | /* In the shared -Bsymbolic case, discard space allocated for | |
1832 | dynamic pc-relative relocs against symbols which turn out to be | |
1833 | defined in regular objects. For the normal shared case, discard | |
1834 | space for pc-relative relocs that have become local due to symbol | |
1835 | visibility changes. */ | |
1836 | ||
1837 | if (info->shared) | |
1838 | { | |
8c21ca21 | 1839 | if (SYMBOL_CALLS_LOCAL (info, h)) |
0451c93c MS |
1840 | { |
1841 | struct elf_s390_dyn_relocs **pp; | |
1842 | ||
1843 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1844 | { | |
1845 | p->count -= p->pc_count; | |
1846 | p->pc_count = 0; | |
1847 | if (p->count == 0) | |
1848 | *pp = p->next; | |
1849 | else | |
1850 | pp = &p->next; | |
1851 | } | |
1852 | } | |
82058a73 MS |
1853 | |
1854 | /* Also discard relocs on undefined weak syms with non-default | |
1855 | visibility. */ | |
22d606e9 | 1856 | if (eh->dyn_relocs != NULL |
82058a73 | 1857 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
1858 | { |
1859 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
1860 | eh->dyn_relocs = NULL; | |
1861 | ||
1862 | /* Make sure undefined weak symbols are output as a dynamic | |
1863 | symbol in PIEs. */ | |
1864 | else if (h->dynindx == -1 | |
1865 | && !h->forced_local) | |
1866 | { | |
1867 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1868 | return FALSE; | |
1869 | } | |
1870 | } | |
0451c93c | 1871 | } |
64285810 | 1872 | else if (ELIMINATE_COPY_RELOCS) |
0451c93c MS |
1873 | { |
1874 | /* For the non-shared case, discard space for relocs against | |
1875 | symbols which turn out to need copy relocs or are not | |
1876 | dynamic. */ | |
1877 | ||
f5385ebf AM |
1878 | if (!h->non_got_ref |
1879 | && ((h->def_dynamic | |
1880 | && !h->def_regular) | |
0451c93c MS |
1881 | || (htab->elf.dynamic_sections_created |
1882 | && (h->root.type == bfd_link_hash_undefweak | |
1883 | || h->root.type == bfd_link_hash_undefined)))) | |
1884 | { | |
1885 | /* Make sure this symbol is output as a dynamic symbol. | |
1886 | Undefined weak syms won't yet be marked as dynamic. */ | |
1887 | if (h->dynindx == -1 | |
f5385ebf | 1888 | && !h->forced_local) |
0451c93c | 1889 | { |
c152c796 | 1890 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1891 | return FALSE; |
0451c93c MS |
1892 | } |
1893 | ||
1894 | /* If that succeeded, we know we'll be keeping all the | |
1895 | relocs. */ | |
1896 | if (h->dynindx != -1) | |
1897 | goto keep; | |
1898 | } | |
1899 | ||
1900 | eh->dyn_relocs = NULL; | |
1901 | ||
ec338859 | 1902 | keep: ; |
0451c93c MS |
1903 | } |
1904 | ||
1905 | /* Finally, allocate space. */ | |
1906 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1907 | { | |
1908 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
ae9a127f | 1909 | |
eea6121a | 1910 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
0451c93c MS |
1911 | } |
1912 | ||
b34976b6 | 1913 | return TRUE; |
0451c93c MS |
1914 | } |
1915 | ||
1916 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1917 | ||
b34976b6 | 1918 | static bfd_boolean |
0451c93c MS |
1919 | readonly_dynrelocs (h, inf) |
1920 | struct elf_link_hash_entry *h; | |
1921 | PTR inf; | |
1922 | { | |
1923 | struct elf_s390_link_hash_entry *eh; | |
1924 | struct elf_s390_dyn_relocs *p; | |
1925 | ||
e92d460e AM |
1926 | if (h->root.type == bfd_link_hash_warning) |
1927 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1928 | ||
0451c93c MS |
1929 | eh = (struct elf_s390_link_hash_entry *) h; |
1930 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1931 | { | |
1932 | asection *s = p->sec->output_section; | |
1933 | ||
1934 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1935 | { | |
1936 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1937 | ||
1938 | info->flags |= DF_TEXTREL; | |
1939 | ||
1940 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1941 | return FALSE; |
0451c93c MS |
1942 | } |
1943 | } | |
b34976b6 | 1944 | return TRUE; |
0451c93c MS |
1945 | } |
1946 | ||
a85d7ed0 NC |
1947 | /* Set the sizes of the dynamic sections. */ |
1948 | ||
b34976b6 | 1949 | static bfd_boolean |
a85d7ed0 | 1950 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1951 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1952 | struct bfd_link_info *info; |
1953 | { | |
0451c93c | 1954 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1955 | bfd *dynobj; |
1956 | asection *s; | |
b34976b6 | 1957 | bfd_boolean relocs; |
0451c93c | 1958 | bfd *ibfd; |
a85d7ed0 | 1959 | |
0451c93c MS |
1960 | htab = elf_s390_hash_table (info); |
1961 | dynobj = htab->elf.dynobj; | |
1962 | if (dynobj == NULL) | |
1963 | abort (); | |
a85d7ed0 | 1964 | |
0451c93c | 1965 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1966 | { |
1967 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1968 | if (info->executable) |
a85d7ed0 NC |
1969 | { |
1970 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1971 | if (s == NULL) |
1972 | abort (); | |
eea6121a | 1973 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
a85d7ed0 NC |
1974 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1975 | } | |
1976 | } | |
a85d7ed0 | 1977 | |
0451c93c MS |
1978 | /* Set up .got offsets for local syms, and space for local dynamic |
1979 | relocs. */ | |
1980 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 1981 | { |
0451c93c MS |
1982 | bfd_signed_vma *local_got; |
1983 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 1984 | char *local_tls_type; |
0451c93c MS |
1985 | bfd_size_type locsymcount; |
1986 | Elf_Internal_Shdr *symtab_hdr; | |
1987 | asection *srela; | |
a85d7ed0 | 1988 | |
0ffa91dd | 1989 | if (! is_s390_elf (ibfd)) |
a85d7ed0 NC |
1990 | continue; |
1991 | ||
0451c93c | 1992 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 1993 | { |
ec338859 | 1994 | struct elf_s390_dyn_relocs *p; |
0451c93c | 1995 | |
6edfbbad | 1996 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
a85d7ed0 | 1997 | { |
ec338859 AM |
1998 | if (!bfd_is_abs_section (p->sec) |
1999 | && bfd_is_abs_section (p->sec->output_section)) | |
2000 | { | |
2001 | /* Input section has been discarded, either because | |
2002 | it is a copy of a linkonce section or due to | |
2003 | linker script /DISCARD/, so we'll be discarding | |
2004 | the relocs too. */ | |
2005 | } | |
248866a8 | 2006 | else if (p->count != 0) |
ec338859 AM |
2007 | { |
2008 | srela = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2009 | srela->size += p->count * sizeof (Elf32_External_Rela); |
248866a8 AM |
2010 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2011 | info->flags |= DF_TEXTREL; | |
ec338859 | 2012 | } |
a85d7ed0 NC |
2013 | } |
2014 | } | |
0451c93c MS |
2015 | |
2016 | local_got = elf_local_got_refcounts (ibfd); | |
2017 | if (!local_got) | |
2018 | continue; | |
2019 | ||
0ffa91dd | 2020 | symtab_hdr = &elf_symtab_hdr (ibfd); |
0451c93c MS |
2021 | locsymcount = symtab_hdr->sh_info; |
2022 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 2023 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
2024 | s = htab->sgot; |
2025 | srela = htab->srelgot; | |
69fc87f1 | 2026 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 2027 | { |
0451c93c | 2028 | if (*local_got > 0) |
a85d7ed0 | 2029 | { |
eea6121a AM |
2030 | *local_got = s->size; |
2031 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 | 2032 | if (*local_tls_type == GOT_TLS_GD) |
eea6121a | 2033 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 2034 | if (info->shared) |
eea6121a | 2035 | srela->size += sizeof (Elf32_External_Rela); |
a85d7ed0 NC |
2036 | } |
2037 | else | |
0451c93c MS |
2038 | *local_got = (bfd_vma) -1; |
2039 | } | |
2040 | } | |
2041 | ||
69fc87f1 MS |
2042 | if (htab->tls_ldm_got.refcount > 0) |
2043 | { | |
2044 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 | |
2045 | relocs. */ | |
eea6121a AM |
2046 | htab->tls_ldm_got.offset = htab->sgot->size; |
2047 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
2048 | htab->srelgot->size += sizeof (Elf32_External_Rela); | |
69fc87f1 MS |
2049 | } |
2050 | else | |
2051 | htab->tls_ldm_got.offset = -1; | |
2052 | ||
0451c93c MS |
2053 | /* Allocate global sym .plt and .got entries, and space for global |
2054 | sym dynamic relocs. */ | |
2055 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2056 | ||
2057 | /* We now have determined the sizes of the various dynamic sections. | |
2058 | Allocate memory for them. */ | |
b34976b6 | 2059 | relocs = FALSE; |
0451c93c MS |
2060 | for (s = dynobj->sections; s != NULL; s = s->next) |
2061 | { | |
2062 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2063 | continue; | |
2064 | ||
2065 | if (s == htab->splt | |
2066 | || s == htab->sgot | |
c456f082 AM |
2067 | || s == htab->sgotplt |
2068 | || s == htab->sdynbss) | |
0451c93c MS |
2069 | { |
2070 | /* Strip this section if we don't need it; see the | |
2071 | comment below. */ | |
a85d7ed0 | 2072 | } |
0112cd26 | 2073 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
0451c93c | 2074 | { |
eea6121a | 2075 | if (s->size != 0) |
b34976b6 | 2076 | relocs = TRUE; |
ec338859 | 2077 | |
0451c93c MS |
2078 | /* We use the reloc_count field as a counter if we need |
2079 | to copy relocs into the output file. */ | |
2080 | s->reloc_count = 0; | |
2081 | } | |
2082 | else | |
a85d7ed0 NC |
2083 | { |
2084 | /* It's not one of our sections, so don't allocate space. */ | |
2085 | continue; | |
2086 | } | |
2087 | ||
eea6121a | 2088 | if (s->size == 0) |
a85d7ed0 | 2089 | { |
0451c93c MS |
2090 | /* If we don't need this section, strip it from the |
2091 | output file. This is to handle .rela.bss and | |
2092 | .rela.plt. We must create it in | |
2093 | create_dynamic_sections, because it must be created | |
2094 | before the linker maps input sections to output | |
2095 | sections. The linker does that before | |
2096 | adjust_dynamic_symbol is called, and it is that | |
2097 | function which decides whether anything needs to go | |
2098 | into these sections. */ | |
2099 | ||
8423293d | 2100 | s->flags |= SEC_EXCLUDE; |
a85d7ed0 NC |
2101 | continue; |
2102 | } | |
2103 | ||
c456f082 AM |
2104 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2105 | continue; | |
2106 | ||
0451c93c MS |
2107 | /* Allocate memory for the section contents. We use bfd_zalloc |
2108 | here in case unused entries are not reclaimed before the | |
2109 | section's contents are written out. This should not happen, | |
2110 | but this way if it does, we get a R_390_NONE reloc instead | |
2111 | of garbage. */ | |
eea6121a | 2112 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
0451c93c | 2113 | if (s->contents == NULL) |
b34976b6 | 2114 | return FALSE; |
a85d7ed0 | 2115 | } |
ec338859 | 2116 | |
0451c93c | 2117 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2118 | { |
2119 | /* Add some entries to the .dynamic section. We fill in the | |
2120 | values later, in elf_s390_finish_dynamic_sections, but we | |
2121 | must add the entries now so that we get the correct size for | |
2122 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2123 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2124 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2125 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
ec338859 | 2126 | |
36af4a4e | 2127 | if (info->executable) |
a85d7ed0 | 2128 | { |
dc810e39 | 2129 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2130 | return FALSE; |
a85d7ed0 | 2131 | } |
ec338859 | 2132 | |
eea6121a | 2133 | if (htab->splt->size != 0) |
a85d7ed0 | 2134 | { |
dc810e39 AM |
2135 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2136 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2137 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2138 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2139 | return FALSE; |
a85d7ed0 | 2140 | } |
ec338859 | 2141 | |
a85d7ed0 | 2142 | if (relocs) |
26e41594 AM |
2143 | { |
2144 | if (!add_dynamic_entry (DT_RELA, 0) | |
2145 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2146 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 2147 | return FALSE; |
a85d7ed0 | 2148 | |
0451c93c MS |
2149 | /* If any dynamic relocs apply to a read-only section, |
2150 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2151 | if ((info->flags & DF_TEXTREL) == 0) |
2152 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2153 | (PTR) info); | |
ec338859 | 2154 | |
0451c93c MS |
2155 | if ((info->flags & DF_TEXTREL) != 0) |
2156 | { | |
2157 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2158 | return FALSE; |
0451c93c | 2159 | } |
a85d7ed0 NC |
2160 | } |
2161 | } | |
dc810e39 | 2162 | #undef add_dynamic_entry |
ec338859 | 2163 | |
b34976b6 | 2164 | return TRUE; |
a85d7ed0 NC |
2165 | } |
2166 | ||
69fc87f1 MS |
2167 | /* Return the base VMA address which should be subtracted from real addresses |
2168 | when resolving @dtpoff relocation. | |
2169 | This is PT_TLS segment p_vaddr. */ | |
2170 | ||
2171 | static bfd_vma | |
2172 | dtpoff_base (info) | |
2173 | struct bfd_link_info *info; | |
2174 | { | |
e1918d23 AM |
2175 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2176 | if (elf_hash_table (info)->tls_sec == NULL) | |
69fc87f1 | 2177 | return 0; |
e1918d23 | 2178 | return elf_hash_table (info)->tls_sec->vma; |
69fc87f1 MS |
2179 | } |
2180 | ||
2181 | /* Return the relocation value for @tpoff relocation | |
2182 | if STT_TLS virtual address is ADDRESS. */ | |
2183 | ||
2184 | static bfd_vma | |
2185 | tpoff (info, address) | |
2186 | struct bfd_link_info *info; | |
2187 | bfd_vma address; | |
2188 | { | |
e1918d23 | 2189 | struct elf_link_hash_table *htab = elf_hash_table (info); |
69fc87f1 | 2190 | |
e1918d23 AM |
2191 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2192 | if (htab->tls_sec == NULL) | |
69fc87f1 | 2193 | return 0; |
e1918d23 | 2194 | return htab->tls_size + htab->tls_sec->vma - address; |
69fc87f1 MS |
2195 | } |
2196 | ||
2197 | /* Complain if TLS instruction relocation is against an invalid | |
2198 | instruction. */ | |
2199 | ||
2200 | static void | |
2201 | invalid_tls_insn (input_bfd, input_section, rel) | |
2202 | bfd *input_bfd; | |
2203 | asection *input_section; | |
2204 | Elf_Internal_Rela *rel; | |
2205 | { | |
2206 | reloc_howto_type *howto; | |
2207 | ||
2208 | howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
2209 | (*_bfd_error_handler) | |
d003868e AM |
2210 | (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), |
2211 | input_bfd, | |
2212 | input_section, | |
69fc87f1 MS |
2213 | (long) rel->r_offset, |
2214 | howto->name); | |
77df2968 | 2215 | bfd_set_error (bfd_error_bad_value); |
69fc87f1 MS |
2216 | } |
2217 | ||
a85d7ed0 NC |
2218 | /* Relocate a 390 ELF section. */ |
2219 | ||
b34976b6 | 2220 | static bfd_boolean |
a85d7ed0 NC |
2221 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2222 | contents, relocs, local_syms, local_sections) | |
2223 | bfd *output_bfd; | |
2224 | struct bfd_link_info *info; | |
2225 | bfd *input_bfd; | |
2226 | asection *input_section; | |
2227 | bfd_byte *contents; | |
2228 | Elf_Internal_Rela *relocs; | |
2229 | Elf_Internal_Sym *local_syms; | |
2230 | asection **local_sections; | |
2231 | { | |
0451c93c | 2232 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2233 | Elf_Internal_Shdr *symtab_hdr; |
2234 | struct elf_link_hash_entry **sym_hashes; | |
2235 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2236 | Elf_Internal_Rela *rel; |
2237 | Elf_Internal_Rela *relend; | |
2238 | ||
0ffa91dd NC |
2239 | BFD_ASSERT (is_s390_elf (input_bfd)); |
2240 | ||
0451c93c | 2241 | htab = elf_s390_hash_table (info); |
0ffa91dd | 2242 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
a85d7ed0 NC |
2243 | sym_hashes = elf_sym_hashes (input_bfd); |
2244 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2245 | ||
a85d7ed0 NC |
2246 | rel = relocs; |
2247 | relend = relocs + input_section->reloc_count; | |
2248 | for (; rel < relend; rel++) | |
2249 | { | |
5236c819 | 2250 | unsigned int r_type; |
a85d7ed0 NC |
2251 | reloc_howto_type *howto; |
2252 | unsigned long r_symndx; | |
2253 | struct elf_link_hash_entry *h; | |
2254 | Elf_Internal_Sym *sym; | |
2255 | asection *sec; | |
0451c93c | 2256 | bfd_vma off; |
a85d7ed0 | 2257 | bfd_vma relocation; |
b34976b6 | 2258 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2259 | bfd_reloc_status_type r; |
69fc87f1 | 2260 | int tls_type; |
ec338859 | 2261 | |
a85d7ed0 NC |
2262 | r_type = ELF32_R_TYPE (rel->r_info); |
2263 | if (r_type == (int) R_390_GNU_VTINHERIT | |
26e41594 AM |
2264 | || r_type == (int) R_390_GNU_VTENTRY) |
2265 | continue; | |
5236c819 | 2266 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2267 | { |
2268 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2269 | return FALSE; |
a85d7ed0 | 2270 | } |
ec338859 | 2271 | |
b491616a | 2272 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2273 | r_symndx = ELF32_R_SYM (rel->r_info); |
5236c819 | 2274 | |
a85d7ed0 NC |
2275 | h = NULL; |
2276 | sym = NULL; | |
2277 | sec = NULL; | |
b34976b6 | 2278 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2279 | if (r_symndx < symtab_hdr->sh_info) |
2280 | { | |
2281 | sym = local_syms + r_symndx; | |
2282 | sec = local_sections[r_symndx]; | |
8517fae7 | 2283 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
a85d7ed0 NC |
2284 | } |
2285 | else | |
2286 | { | |
560e09e9 | 2287 | bfd_boolean warned ATTRIBUTE_UNUSED; |
ec338859 | 2288 | |
b2a8e766 AM |
2289 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2290 | r_symndx, symtab_hdr, sym_hashes, | |
2291 | h, sec, relocation, | |
2292 | unresolved_reloc, warned); | |
a85d7ed0 | 2293 | } |
ec338859 | 2294 | |
ab96bf03 AM |
2295 | if (sec != NULL && elf_discarded_section (sec)) |
2296 | { | |
2297 | /* For relocs against symbols from removed linkonce sections, | |
2298 | or sections discarded by a linker script, we just want the | |
2299 | section contents zeroed. Avoid any special processing. */ | |
2300 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2301 | rel->r_info = 0; | |
2302 | rel->r_addend = 0; | |
2303 | continue; | |
2304 | } | |
2305 | ||
2306 | if (info->relocatable) | |
2307 | continue; | |
2308 | ||
a85d7ed0 NC |
2309 | switch (r_type) |
2310 | { | |
5236c819 MS |
2311 | case R_390_GOTPLT12: |
2312 | case R_390_GOTPLT16: | |
bd1ea41b | 2313 | case R_390_GOTPLT20: |
5236c819 MS |
2314 | case R_390_GOTPLT32: |
2315 | case R_390_GOTPLTENT: | |
2316 | /* There are three cases for a GOTPLT relocation. 1) The | |
2317 | relocation is against the jump slot entry of a plt that | |
2318 | will get emitted to the output file. 2) The relocation | |
2319 | is against the jump slot of a plt entry that has been | |
2320 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2321 | as replacement. 3) The relocation is against a local symbol. | |
2322 | Cases 2) and 3) are the same as the GOT relocation code | |
2323 | so we just have to test for case 1 and fall through for | |
2324 | the other two. */ | |
2325 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2326 | { | |
2327 | bfd_vma plt_index; | |
2328 | ||
2329 | /* Calc. index no. | |
2330 | Current offset - size first entry / entry size. */ | |
2331 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2332 | PLT_ENTRY_SIZE; | |
26e41594 | 2333 | |
5236c819 MS |
2334 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2335 | addr & GOT addr. */ | |
2336 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2337 | unresolved_reloc = FALSE; | |
2338 | ||
2339 | if (r_type == R_390_GOTPLTENT) | |
2340 | relocation += htab->sgot->output_section->vma; | |
2341 | break; | |
2342 | } | |
2343 | /* Fall through. */ | |
2344 | ||
26e41594 AM |
2345 | case R_390_GOT12: |
2346 | case R_390_GOT16: | |
bd1ea41b | 2347 | case R_390_GOT20: |
26e41594 | 2348 | case R_390_GOT32: |
befc3abb | 2349 | case R_390_GOTENT: |
26e41594 AM |
2350 | /* Relocation is to the entry for this symbol in the global |
2351 | offset table. */ | |
0451c93c MS |
2352 | if (htab->sgot == NULL) |
2353 | abort (); | |
ec338859 | 2354 | |
26e41594 AM |
2355 | if (h != NULL) |
2356 | { | |
b34976b6 | 2357 | bfd_boolean dyn; |
ec338859 | 2358 | |
26e41594 | 2359 | off = h->got.offset; |
0451c93c | 2360 | dyn = htab->elf.dynamic_sections_created; |
4ec72bde | 2361 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
26e41594 | 2362 | || (info->shared |
8c21ca21 | 2363 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
82058a73 MS |
2364 | || (ELF_ST_VISIBILITY (h->other) |
2365 | && h->root.type == bfd_link_hash_undefweak)) | |
26e41594 AM |
2366 | { |
2367 | /* This is actually a static link, or it is a | |
2368 | -Bsymbolic link and the symbol is defined | |
2369 | locally, or the symbol was forced to be local | |
2370 | because of a version file. We must initialize | |
2371 | this entry in the global offset table. Since the | |
2372 | offset must always be a multiple of 2, we use the | |
2373 | least significant bit to record whether we have | |
2374 | initialized it already. | |
2375 | ||
2376 | When doing a dynamic link, we create a .rel.got | |
2377 | relocation entry to initialize the value. This | |
2378 | is done in the finish_dynamic_symbol routine. */ | |
2379 | if ((off & 1) != 0) | |
2380 | off &= ~1; | |
2381 | else | |
2382 | { | |
a85d7ed0 | 2383 | bfd_put_32 (output_bfd, relocation, |
0451c93c | 2384 | htab->sgot->contents + off); |
26e41594 AM |
2385 | h->got.offset |= 1; |
2386 | } | |
2387 | } | |
0451c93c | 2388 | else |
b34976b6 | 2389 | unresolved_reloc = FALSE; |
26e41594 AM |
2390 | } |
2391 | else | |
2392 | { | |
0451c93c MS |
2393 | if (local_got_offsets == NULL) |
2394 | abort (); | |
a85d7ed0 | 2395 | |
26e41594 | 2396 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2397 | |
26e41594 AM |
2398 | /* The offset must always be a multiple of 4. We use |
2399 | the least significant bit to record whether we have | |
2400 | already generated the necessary reloc. */ | |
2401 | if ((off & 1) != 0) | |
2402 | off &= ~1; | |
2403 | else | |
2404 | { | |
2405 | bfd_put_32 (output_bfd, relocation, | |
0451c93c | 2406 | htab->sgot->contents + off); |
a85d7ed0 | 2407 | |
26e41594 AM |
2408 | if (info->shared) |
2409 | { | |
2410 | asection *srelgot; | |
2411 | Elf_Internal_Rela outrel; | |
947216bf | 2412 | bfd_byte *loc; |
a85d7ed0 | 2413 | |
26e41594 | 2414 | srelgot = htab->srelgot; |
0451c93c MS |
2415 | if (srelgot == NULL) |
2416 | abort (); | |
a85d7ed0 | 2417 | |
26e41594 AM |
2418 | outrel.r_offset = (htab->sgot->output_section->vma |
2419 | + htab->sgot->output_offset | |
2420 | + off); | |
2421 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2422 | outrel.r_addend = relocation; |
947216bf AM |
2423 | loc = srelgot->contents; |
2424 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
26e41594 AM |
2425 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
2426 | } | |
a85d7ed0 | 2427 | |
26e41594 AM |
2428 | local_got_offsets[r_symndx] |= 1; |
2429 | } | |
2430 | } | |
a85d7ed0 | 2431 | |
0451c93c MS |
2432 | if (off >= (bfd_vma) -2) |
2433 | abort (); | |
a85d7ed0 | 2434 | |
0451c93c | 2435 | relocation = htab->sgot->output_offset + off; |
befc3abb | 2436 | |
ae9a127f NC |
2437 | /* For @GOTENT the relocation is against the offset between |
2438 | the instruction and the symbols entry in the GOT and not | |
2439 | between the start of the GOT and the symbols entry. We | |
2440 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2441 | if ( r_type == R_390_GOTENT |
2442 | || r_type == R_390_GOTPLTENT) | |
befc3abb MS |
2443 | relocation += htab->sgot->output_section->vma; |
2444 | ||
26e41594 | 2445 | break; |
dc810e39 | 2446 | |
5236c819 | 2447 | case R_390_GOTOFF16: |
26e41594 AM |
2448 | case R_390_GOTOFF32: |
2449 | /* Relocation is relative to the start of the global offset | |
2450 | table. */ | |
2451 | ||
2452 | /* Note that sgot->output_offset is not involved in this | |
2453 | calculation. We always want the start of .got. If we | |
2454 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2455 | permitted by the ABI, we might have to change this | |
2456 | calculation. */ | |
2457 | relocation -= htab->sgot->output_section->vma; | |
2458 | break; | |
2459 | ||
2460 | case R_390_GOTPC: | |
befc3abb | 2461 | case R_390_GOTPCDBL: |
26e41594 AM |
2462 | /* Use global offset table as symbol value. */ |
2463 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2464 | unresolved_reloc = FALSE; |
26e41594 | 2465 | break; |
a85d7ed0 | 2466 | |
26e41594 AM |
2467 | case R_390_PLT16DBL: |
2468 | case R_390_PLT32DBL: | |
2469 | case R_390_PLT32: | |
2470 | /* Relocation is to the entry for this symbol in the | |
2471 | procedure linkage table. */ | |
a85d7ed0 | 2472 | |
26e41594 AM |
2473 | /* Resolve a PLT32 reloc against a local symbol directly, |
2474 | without using the procedure linkage table. */ | |
2475 | if (h == NULL) | |
2476 | break; | |
a85d7ed0 | 2477 | |
26e41594 | 2478 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2479 | || htab->splt == NULL) |
26e41594 AM |
2480 | { |
2481 | /* We didn't make a PLT entry for this symbol. This | |
2482 | happens when statically linking PIC code, or when | |
2483 | using -Bsymbolic. */ | |
2484 | break; | |
2485 | } | |
2486 | ||
2487 | relocation = (htab->splt->output_section->vma | |
2488 | + htab->splt->output_offset | |
2489 | + h->plt.offset); | |
b34976b6 | 2490 | unresolved_reloc = FALSE; |
26e41594 | 2491 | break; |
a85d7ed0 | 2492 | |
5236c819 MS |
2493 | case R_390_PLTOFF16: |
2494 | case R_390_PLTOFF32: | |
26e41594 AM |
2495 | /* Relocation is to the entry for this symbol in the |
2496 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2497 | |
2498 | /* For local symbols or if we didn't make a PLT entry for | |
2499 | this symbol resolve the symbol directly. */ | |
26e41594 | 2500 | if ( h == NULL |
5236c819 MS |
2501 | || h->plt.offset == (bfd_vma) -1 |
2502 | || htab->splt == NULL) | |
2503 | { | |
2504 | relocation -= htab->sgot->output_section->vma; | |
2505 | break; | |
2506 | } | |
2507 | ||
26e41594 AM |
2508 | relocation = (htab->splt->output_section->vma |
2509 | + htab->splt->output_offset | |
2510 | + h->plt.offset | |
5236c819 MS |
2511 | - htab->sgot->output_section->vma); |
2512 | unresolved_reloc = FALSE; | |
26e41594 AM |
2513 | break; |
2514 | ||
2515 | case R_390_8: | |
2516 | case R_390_16: | |
2517 | case R_390_32: | |
2518 | case R_390_PC16: | |
2519 | case R_390_PC16DBL: | |
2520 | case R_390_PC32DBL: | |
2521 | case R_390_PC32: | |
b1e24c02 | 2522 | if ((input_section->flags & SEC_ALLOC) == 0) |
ec338859 AM |
2523 | break; |
2524 | ||
26e41594 | 2525 | if ((info->shared |
82058a73 MS |
2526 | && (h == NULL |
2527 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2528 | || h->root.type != bfd_link_hash_undefweak) | |
0451c93c MS |
2529 | && ((r_type != R_390_PC16 |
2530 | && r_type != R_390_PC16DBL | |
befc3abb | 2531 | && r_type != R_390_PC32DBL |
0451c93c | 2532 | && r_type != R_390_PC32) |
8c21ca21 | 2533 | || !SYMBOL_CALLS_LOCAL (info, h))) |
64285810 MS |
2534 | || (ELIMINATE_COPY_RELOCS |
2535 | && !info->shared | |
0451c93c MS |
2536 | && h != NULL |
2537 | && h->dynindx != -1 | |
f5385ebf AM |
2538 | && !h->non_got_ref |
2539 | && ((h->def_dynamic | |
2540 | && !h->def_regular) | |
0451c93c MS |
2541 | || h->root.type == bfd_link_hash_undefweak |
2542 | || h->root.type == bfd_link_hash_undefined))) | |
26e41594 AM |
2543 | { |
2544 | Elf_Internal_Rela outrel; | |
2545 | bfd_boolean skip, relocate; | |
0451c93c | 2546 | asection *sreloc; |
947216bf | 2547 | bfd_byte *loc; |
ec338859 | 2548 | |
0451c93c MS |
2549 | /* When generating a shared object, these relocations |
2550 | are copied into the output file to be resolved at run | |
2551 | time. */ | |
ec338859 | 2552 | |
26e41594 AM |
2553 | skip = FALSE; |
2554 | relocate = FALSE; | |
ec338859 | 2555 | |
c629eae0 JJ |
2556 | outrel.r_offset = |
2557 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2558 | rel->r_offset); | |
2559 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2560 | skip = TRUE; |
0bb2d96a | 2561 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2562 | skip = TRUE, relocate = TRUE; |
26e41594 AM |
2563 | outrel.r_offset += (input_section->output_section->vma |
2564 | + input_section->output_offset); | |
ec338859 | 2565 | |
26e41594 | 2566 | if (skip) |
0bb2d96a | 2567 | memset (&outrel, 0, sizeof outrel); |
26e41594 | 2568 | else if (h != NULL |
0451c93c MS |
2569 | && h->dynindx != -1 |
2570 | && (r_type == R_390_PC16 | |
2571 | || r_type == R_390_PC16DBL | |
befc3abb | 2572 | || r_type == R_390_PC32DBL |
0451c93c MS |
2573 | || r_type == R_390_PC32 |
2574 | || !info->shared | |
8c21ca21 | 2575 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 2576 | || !h->def_regular)) |
26e41594 AM |
2577 | { |
2578 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
27018c3f | 2579 | outrel.r_addend = rel->r_addend; |
26e41594 AM |
2580 | } |
2581 | else | |
2582 | { | |
0451c93c | 2583 | /* This symbol is local, or marked to become local. */ |
90ced0dd | 2584 | outrel.r_addend = relocation + rel->r_addend; |
b5727d75 MS |
2585 | if (r_type == R_390_32) |
2586 | { | |
2587 | relocate = TRUE; | |
2588 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
b5727d75 MS |
2589 | } |
2590 | else | |
2591 | { | |
2592 | long sindx; | |
2593 | ||
90ced0dd | 2594 | if (bfd_is_abs_section (sec)) |
b5727d75 MS |
2595 | sindx = 0; |
2596 | else if (sec == NULL || sec->owner == NULL) | |
2597 | { | |
2598 | bfd_set_error(bfd_error_bad_value); | |
2599 | return FALSE; | |
2600 | } | |
2601 | else | |
2602 | { | |
2603 | asection *osec; | |
2604 | ||
2605 | osec = sec->output_section; | |
2606 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
2607 | if (sindx == 0) |
2608 | { | |
2609 | osec = htab->elf.text_index_section; | |
2610 | sindx = elf_section_data (osec)->dynindx; | |
2611 | } | |
2612 | BFD_ASSERT (sindx != 0); | |
90ced0dd MS |
2613 | |
2614 | /* We are turning this relocation into one | |
2615 | against a section symbol, so subtract out | |
2616 | the output section's address but not the | |
2617 | offset of the input section in the output | |
2618 | section. */ | |
90ced0dd | 2619 | outrel.r_addend -= osec->vma; |
b5727d75 MS |
2620 | } |
2621 | outrel.r_info = ELF32_R_INFO (sindx, r_type); | |
b5727d75 | 2622 | } |
26e41594 | 2623 | } |
ec338859 | 2624 | |
0451c93c MS |
2625 | sreloc = elf_section_data (input_section)->sreloc; |
2626 | if (sreloc == NULL) | |
2627 | abort (); | |
ec338859 | 2628 | |
947216bf AM |
2629 | loc = sreloc->contents; |
2630 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 2631 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
ec338859 | 2632 | |
26e41594 AM |
2633 | /* If this reloc is against an external symbol, we do |
2634 | not want to fiddle with the addend. Otherwise, we | |
2635 | need to include the symbol value so that it becomes | |
2636 | an addend for the dynamic reloc. */ | |
2637 | if (! relocate) | |
2638 | continue; | |
2639 | } | |
0451c93c | 2640 | break; |
ec338859 | 2641 | |
69fc87f1 MS |
2642 | /* Relocations for tls literal pool entries. */ |
2643 | case R_390_TLS_IE32: | |
2644 | if (info->shared) | |
2645 | { | |
2646 | Elf_Internal_Rela outrel; | |
2647 | asection *sreloc; | |
2648 | bfd_byte *loc; | |
2649 | ||
2650 | outrel.r_offset = rel->r_offset | |
2651 | + input_section->output_section->vma | |
2652 | + input_section->output_offset; | |
2653 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
2654 | sreloc = elf_section_data (input_section)->sreloc; | |
2655 | if (sreloc == NULL) | |
2656 | abort (); | |
2657 | loc = sreloc->contents; | |
2658 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2659 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
2660 | } | |
ae9a127f | 2661 | /* Fall through. */ |
69fc87f1 MS |
2662 | |
2663 | case R_390_TLS_GD32: | |
2664 | case R_390_TLS_GOTIE32: | |
2665 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2666 | tls_type = GOT_UNKNOWN; | |
2667 | if (h == NULL && local_got_offsets) | |
2668 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2669 | else if (h != NULL) | |
2670 | { | |
2671 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2672 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2673 | r_type = R_390_TLS_LE32; | |
2674 | } | |
2675 | if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) | |
2676 | r_type = R_390_TLS_IE32; | |
2677 | ||
2678 | if (r_type == R_390_TLS_LE32) | |
2679 | { | |
2680 | /* This relocation gets optimized away by the local exec | |
2681 | access optimization. */ | |
2682 | BFD_ASSERT (! unresolved_reloc); | |
2683 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2684 | contents + rel->r_offset); | |
2685 | continue; | |
2686 | } | |
2687 | ||
2688 | if (htab->sgot == NULL) | |
2689 | abort (); | |
2690 | ||
2691 | if (h != NULL) | |
2692 | off = h->got.offset; | |
2693 | else | |
2694 | { | |
2695 | if (local_got_offsets == NULL) | |
2696 | abort (); | |
2697 | ||
2698 | off = local_got_offsets[r_symndx]; | |
2699 | } | |
2700 | ||
2701 | emit_tls_relocs: | |
2702 | ||
2703 | if ((off & 1) != 0) | |
2704 | off &= ~1; | |
26e41594 | 2705 | else |
69fc87f1 MS |
2706 | { |
2707 | Elf_Internal_Rela outrel; | |
2708 | bfd_byte *loc; | |
2709 | int dr_type, indx; | |
2710 | ||
2711 | if (htab->srelgot == NULL) | |
2712 | abort (); | |
2713 | ||
2714 | outrel.r_offset = (htab->sgot->output_section->vma | |
2715 | + htab->sgot->output_offset + off); | |
2716 | ||
2717 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2718 | if (r_type == R_390_TLS_GD32) | |
2719 | dr_type = R_390_TLS_DTPMOD; | |
2720 | else | |
2721 | dr_type = R_390_TLS_TPOFF; | |
2722 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2723 | outrel.r_addend = relocation - dtpoff_base (info); | |
2724 | else | |
2725 | outrel.r_addend = 0; | |
2726 | outrel.r_info = ELF32_R_INFO (indx, dr_type); | |
2727 | loc = htab->srelgot->contents; | |
2728 | loc += htab->srelgot->reloc_count++ | |
2729 | * sizeof (Elf32_External_Rela); | |
2730 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2731 | ||
2732 | if (r_type == R_390_TLS_GD32) | |
2733 | { | |
2734 | if (indx == 0) | |
2735 | { | |
26e41594 | 2736 | BFD_ASSERT (! unresolved_reloc); |
69fc87f1 MS |
2737 | bfd_put_32 (output_bfd, |
2738 | relocation - dtpoff_base (info), | |
2739 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2740 | } | |
2741 | else | |
2742 | { | |
2743 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); | |
2744 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2745 | outrel.r_addend = 0; | |
2746 | htab->srelgot->reloc_count++; | |
2747 | loc += sizeof (Elf32_External_Rela); | |
2748 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2749 | } | |
2750 | } | |
2751 | ||
2752 | if (h != NULL) | |
2753 | h->got.offset |= 1; | |
2754 | else | |
2755 | local_got_offsets[r_symndx] |= 1; | |
2756 | } | |
2757 | ||
2758 | if (off >= (bfd_vma) -2) | |
2759 | abort (); | |
2760 | if (r_type == ELF32_R_TYPE (rel->r_info)) | |
2761 | { | |
2762 | relocation = htab->sgot->output_offset + off; | |
2763 | if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) | |
2764 | relocation += htab->sgot->output_section->vma; | |
2765 | unresolved_reloc = FALSE; | |
2766 | } | |
2767 | else | |
2768 | { | |
2769 | bfd_put_32 (output_bfd, htab->sgot->output_offset + off, | |
2770 | contents + rel->r_offset); | |
2771 | continue; | |
2772 | } | |
2773 | break; | |
2774 | ||
2775 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 2776 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
2777 | case R_390_TLS_IEENT: |
2778 | if (h == NULL) | |
2779 | { | |
2780 | if (local_got_offsets == NULL) | |
2781 | abort(); | |
2782 | off = local_got_offsets[r_symndx]; | |
2783 | if (info->shared) | |
2784 | goto emit_tls_relocs; | |
2785 | } | |
2786 | else | |
2787 | { | |
2788 | off = h->got.offset; | |
2789 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2790 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2791 | goto emit_tls_relocs; | |
2792 | } | |
2793 | ||
2794 | if (htab->sgot == NULL) | |
2795 | abort (); | |
2796 | ||
2797 | BFD_ASSERT (! unresolved_reloc); | |
2798 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2799 | htab->sgot->contents + off); | |
2800 | relocation = htab->sgot->output_offset + off; | |
2801 | if (r_type == R_390_TLS_IEENT) | |
2802 | relocation += htab->sgot->output_section->vma; | |
2803 | unresolved_reloc = FALSE; | |
2804 | break; | |
2805 | ||
2806 | case R_390_TLS_LDM32: | |
2807 | if (! info->shared) | |
2808 | /* The literal pool entry this relocation refers to gets ignored | |
2809 | by the optimized code of the local exec model. Do nothing | |
2810 | and the value will turn out zero. */ | |
2811 | continue; | |
2812 | ||
2813 | if (htab->sgot == NULL) | |
2814 | abort (); | |
2815 | ||
2816 | off = htab->tls_ldm_got.offset; | |
2817 | if (off & 1) | |
2818 | off &= ~1; | |
2819 | else | |
2820 | { | |
2821 | Elf_Internal_Rela outrel; | |
2822 | bfd_byte *loc; | |
2823 | ||
2824 | if (htab->srelgot == NULL) | |
2825 | abort (); | |
2826 | ||
2827 | outrel.r_offset = (htab->sgot->output_section->vma | |
2828 | + htab->sgot->output_offset + off); | |
2829 | ||
2830 | bfd_put_32 (output_bfd, 0, | |
2831 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2832 | outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); | |
2833 | outrel.r_addend = 0; | |
2834 | loc = htab->srelgot->contents; | |
2835 | loc += htab->srelgot->reloc_count++ | |
2836 | * sizeof (Elf32_External_Rela); | |
2837 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2838 | htab->tls_ldm_got.offset |= 1; | |
2839 | } | |
2840 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2841 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2842 | break; |
2843 | ||
2844 | case R_390_TLS_LE32: | |
2845 | if (info->shared) | |
2846 | { | |
2847 | /* Linking a shared library with non-fpic code requires | |
2848 | a R_390_TLS_TPOFF relocation. */ | |
2849 | Elf_Internal_Rela outrel; | |
2850 | asection *sreloc; | |
2851 | bfd_byte *loc; | |
2852 | int indx; | |
2853 | ||
2854 | outrel.r_offset = rel->r_offset | |
2855 | + input_section->output_section->vma | |
2856 | + input_section->output_offset; | |
2857 | if (h != NULL && h->dynindx != -1) | |
2858 | indx = h->dynindx; | |
2859 | else | |
2860 | indx = 0; | |
2861 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); | |
2862 | if (indx == 0) | |
2863 | outrel.r_addend = relocation - dtpoff_base (info); | |
2864 | else | |
2865 | outrel.r_addend = 0; | |
2866 | sreloc = elf_section_data (input_section)->sreloc; | |
2867 | if (sreloc == NULL) | |
2868 | abort (); | |
2869 | loc = sreloc->contents; | |
2870 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
2871 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2872 | } | |
2873 | else | |
2874 | { | |
2875 | BFD_ASSERT (! unresolved_reloc); | |
2876 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2877 | contents + rel->r_offset); | |
2878 | } | |
2879 | continue; | |
2880 | ||
2881 | case R_390_TLS_LDO32: | |
36c10a8f | 2882 | if (info->shared) |
69fc87f1 MS |
2883 | relocation -= dtpoff_base (info); |
2884 | else | |
2885 | /* When converting LDO to LE, we must negate. */ | |
2886 | relocation = -tpoff (info, relocation); | |
2887 | break; | |
2888 | ||
2889 | /* Relocations for tls instructions. */ | |
2890 | case R_390_TLS_LOAD: | |
2891 | case R_390_TLS_GDCALL: | |
2892 | case R_390_TLS_LDCALL: | |
2893 | tls_type = GOT_UNKNOWN; | |
2894 | if (h == NULL && local_got_offsets) | |
2895 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2896 | else if (h != NULL) | |
2897 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2898 | ||
2899 | if (tls_type == GOT_TLS_GD) | |
2900 | continue; | |
2901 | ||
2902 | if (r_type == R_390_TLS_LOAD) | |
2903 | { | |
2904 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2905 | { | |
2906 | /* IE->LE transition. Four valid cases: | |
2907 | l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 | |
2908 | l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 | |
2909 | l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 | |
2910 | l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2911 | unsigned int insn, ry; | |
2912 | ||
2913 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2914 | ry = 0; | |
2915 | if ((insn & 0xff00f000) == 0x58000000) | |
2916 | /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ | |
2917 | ry = (insn & 0x000f0000); | |
2918 | else if ((insn & 0xff0f0000) == 0x58000000) | |
2919 | /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2920 | ry = (insn & 0x0000f000) << 4; | |
2921 | else if ((insn & 0xff00f000) == 0x5800c000) | |
2922 | /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ | |
2923 | ry = (insn & 0x000f0000); | |
2924 | else if ((insn & 0xff0f0000) == 0x580c0000) | |
2925 | /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ | |
2926 | ry = (insn & 0x0000f000) << 4; | |
2927 | else | |
2928 | invalid_tls_insn (input_bfd, input_section, rel); | |
2929 | insn = 0x18000700 | (insn & 0x00f00000) | ry; | |
2930 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); | |
2931 | } | |
2932 | } | |
2933 | else if (r_type == R_390_TLS_GDCALL) | |
2934 | { | |
2935 | unsigned int insn; | |
2936 | ||
2937 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
77df2968 MS |
2938 | if ((insn & 0xff000fff) != 0x4d000000 && |
2939 | (insn & 0xffff0000) != 0xc0e50000) | |
69fc87f1 MS |
2940 | invalid_tls_insn (input_bfd, input_section, rel); |
2941 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
77df2968 MS |
2942 | { |
2943 | if ((insn & 0xff000000) == 0x4d000000) | |
2944 | { | |
2945 | /* GD->LE transition. | |
2946 | bas %r14,0(%rx,%r13) -> bc 0,0 */ | |
2947 | insn = 0x47000000; | |
2948 | } | |
2949 | else | |
2950 | { | |
2951 | /* GD->LE transition. | |
2952 | brasl %r14,_tls_get_addr@plt -> brcl 0,. */ | |
2953 | insn = 0xc0040000; | |
2954 | bfd_put_16 (output_bfd, 0x0000, | |
2955 | contents + rel->r_offset + 4); | |
2956 | } | |
2957 | } | |
69fc87f1 | 2958 | else |
77df2968 MS |
2959 | { |
2960 | if ((insn & 0xff000000) == 0x4d000000) | |
2961 | { | |
2962 | /* GD->IE transition. | |
2963 | bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ | |
2964 | insn = 0x5822c000; | |
2965 | } | |
2966 | else | |
2967 | { | |
2968 | /* GD->IE transition. | |
2969 | brasl %r14,__tls_get_addr@plt -> | |
2970 | l %r2,0(%r2,%r12) ; bcr 0,0 */ | |
2971 | insn = 0x5822c000; | |
2972 | bfd_put_16 (output_bfd, 0x0700, | |
2973 | contents + rel->r_offset + 4); | |
2974 | } | |
2975 | } | |
69fc87f1 MS |
2976 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
2977 | } | |
2978 | else if (r_type == R_390_TLS_LDCALL) | |
2979 | { | |
2980 | if (!info->shared) | |
2981 | { | |
2982 | unsigned int insn; | |
2983 | ||
2984 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
77df2968 MS |
2985 | if ((insn & 0xff000fff) != 0x4d000000 && |
2986 | (insn & 0xffff0000) != 0xc0e50000) | |
69fc87f1 | 2987 | invalid_tls_insn (input_bfd, input_section, rel); |
77df2968 MS |
2988 | if ((insn & 0xff000000) == 0x4d000000) |
2989 | { | |
2990 | /* LD->LE transition. | |
2991 | bas %r14,0(%rx,%r13) -> bc 0,0 */ | |
2992 | insn = 0x47000000; | |
2993 | } | |
2994 | else | |
2995 | { | |
2996 | /* LD->LE transition. | |
2997 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2998 | insn = 0xc0040000; | |
2999 | bfd_put_16 (output_bfd, 0x0000, | |
3000 | contents + rel->r_offset + 4); | |
3001 | } | |
69fc87f1 MS |
3002 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
3003 | } | |
3004 | } | |
3005 | continue; | |
3006 | ||
0451c93c MS |
3007 | default: |
3008 | break; | |
3009 | } | |
ec338859 | 3010 | |
239e1f3a AM |
3011 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3012 | because such sections are not SEC_ALLOC and thus ld.so will | |
3013 | not process them. */ | |
0451c93c | 3014 | if (unresolved_reloc |
239e1f3a | 3015 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3016 | && h->def_dynamic)) |
0451c93c | 3017 | (*_bfd_error_handler) |
843fe662 | 3018 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3019 | input_bfd, |
3020 | input_section, | |
0451c93c | 3021 | (long) rel->r_offset, |
843fe662 | 3022 | howto->name, |
0451c93c | 3023 | h->root.root.string); |
ec338859 | 3024 | |
bd1ea41b MS |
3025 | if (r_type == R_390_20 |
3026 | || r_type == R_390_GOT20 | |
3027 | || r_type == R_390_GOTPLT20 | |
3028 | || r_type == R_390_TLS_GOTIE20) | |
3029 | { | |
3030 | relocation += rel->r_addend; | |
3031 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; | |
3032 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3033 | contents, rel->r_offset, | |
3034 | relocation, 0); | |
3035 | } | |
3036 | else | |
3037 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3038 | contents, rel->r_offset, | |
3039 | relocation, rel->r_addend); | |
ec338859 | 3040 | |
a85d7ed0 NC |
3041 | if (r != bfd_reloc_ok) |
3042 | { | |
0451c93c | 3043 | const char *name; |
ec338859 | 3044 | |
0451c93c MS |
3045 | if (h != NULL) |
3046 | name = h->root.root.string; | |
3047 | else | |
a85d7ed0 | 3048 | { |
0451c93c MS |
3049 | name = bfd_elf_string_from_elf_section (input_bfd, |
3050 | symtab_hdr->sh_link, | |
3051 | sym->st_name); | |
3052 | if (name == NULL) | |
b34976b6 | 3053 | return FALSE; |
0451c93c MS |
3054 | if (*name == '\0') |
3055 | name = bfd_section_name (input_bfd, sec); | |
3056 | } | |
ec338859 | 3057 | |
0451c93c MS |
3058 | if (r == bfd_reloc_overflow) |
3059 | { | |
ec338859 | 3060 | |
0451c93c | 3061 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3062 | (info, (h ? &h->root : NULL), name, howto->name, |
3063 | (bfd_vma) 0, input_bfd, input_section, | |
3064 | rel->r_offset))) | |
b34976b6 | 3065 | return FALSE; |
0451c93c MS |
3066 | } |
3067 | else | |
3068 | { | |
3069 | (*_bfd_error_handler) | |
d003868e AM |
3070 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3071 | input_bfd, input_section, | |
0451c93c | 3072 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3073 | return FALSE; |
a85d7ed0 NC |
3074 | } |
3075 | } | |
3076 | } | |
ec338859 | 3077 | |
b34976b6 | 3078 | return TRUE; |
a85d7ed0 NC |
3079 | } |
3080 | ||
3081 | /* Finish up dynamic symbol handling. We set the contents of various | |
3082 | dynamic sections here. */ | |
3083 | ||
b34976b6 | 3084 | static bfd_boolean |
a85d7ed0 NC |
3085 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
3086 | bfd *output_bfd; | |
3087 | struct bfd_link_info *info; | |
3088 | struct elf_link_hash_entry *h; | |
3089 | Elf_Internal_Sym *sym; | |
3090 | { | |
0451c93c | 3091 | struct elf_s390_link_hash_table *htab; |
ec338859 | 3092 | |
0451c93c | 3093 | htab = elf_s390_hash_table (info); |
ec338859 | 3094 | |
a85d7ed0 NC |
3095 | if (h->plt.offset != (bfd_vma) -1) |
3096 | { | |
0451c93c MS |
3097 | bfd_vma plt_index; |
3098 | bfd_vma got_offset; | |
a85d7ed0 | 3099 | Elf_Internal_Rela rela; |
947216bf | 3100 | bfd_byte *loc; |
a85d7ed0 | 3101 | bfd_vma relative_offset; |
ec338859 | 3102 | |
a85d7ed0 | 3103 | /* This symbol has an entry in the procedure linkage table. Set |
26e41594 | 3104 | it up. */ |
0451c93c MS |
3105 | if (h->dynindx == -1 |
3106 | || htab->splt == NULL | |
3107 | || htab->sgotplt == NULL | |
3108 | || htab->srelplt == NULL) | |
3109 | abort (); | |
a85d7ed0 | 3110 | |
dc810e39 | 3111 | /* Calc. index no. |
26e41594 | 3112 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
3113 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
3114 | ||
3115 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, | |
26e41594 | 3116 | addr & GOT addr. */ |
a85d7ed0 NC |
3117 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3118 | ||
3119 | /* S390 uses halfwords for relative branch calc! */ | |
dc810e39 | 3120 | relative_offset = - ((PLT_FIRST_ENTRY_SIZE + |
26e41594 | 3121 | (PLT_ENTRY_SIZE * plt_index) + 18) / 2); |
a85d7ed0 | 3122 | /* If offset is > 32768, branch to a previous branch |
26e41594 | 3123 | 390 can only handle +-64 K jumps. */ |
dc810e39 | 3124 | if ( -32768 > (int) relative_offset ) |
26e41594 AM |
3125 | relative_offset |
3126 | = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); | |
a85d7ed0 NC |
3127 | |
3128 | /* Fill in the entry in the procedure linkage table. */ | |
3129 | if (!info->shared) | |
0451c93c | 3130 | { |
26e41594 | 3131 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
0451c93c MS |
3132 | htab->splt->contents + h->plt.offset); |
3133 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
3134 | htab->splt->contents + h->plt.offset + 4); | |
3135 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
3136 | htab->splt->contents + h->plt.offset + 8); | |
3137 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
3138 | htab->splt->contents + h->plt.offset + 12); | |
3139 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
3140 | htab->splt->contents + h->plt.offset + 16); | |
3141 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3142 | htab->splt->contents + h->plt.offset + 20); | |
3143 | bfd_put_32 (output_bfd, | |
3144 | (htab->sgotplt->output_section->vma | |
3145 | + htab->sgotplt->output_offset | |
3146 | + got_offset), | |
3147 | htab->splt->contents + h->plt.offset + 24); | |
3148 | } | |
a85d7ed0 | 3149 | else if (got_offset < 4096) |
0451c93c MS |
3150 | { |
3151 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset, | |
3152 | htab->splt->contents + h->plt.offset); | |
3153 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1, | |
3154 | htab->splt->contents + h->plt.offset + 4); | |
3155 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2, | |
3156 | htab->splt->contents + h->plt.offset + 8); | |
3157 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3, | |
3158 | htab->splt->contents + h->plt.offset + 12); | |
3159 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4, | |
3160 | htab->splt->contents + h->plt.offset + 16); | |
3161 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3162 | htab->splt->contents + h->plt.offset + 20); | |
3163 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3164 | htab->splt->contents + h->plt.offset + 24); | |
3165 | } | |
a85d7ed0 | 3166 | else if (got_offset < 32768) |
0451c93c MS |
3167 | { |
3168 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset, | |
3169 | htab->splt->contents + h->plt.offset); | |
3170 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1, | |
3171 | htab->splt->contents + h->plt.offset + 4); | |
3172 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2, | |
3173 | htab->splt->contents + h->plt.offset + 8); | |
3174 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3, | |
3175 | htab->splt->contents + h->plt.offset + 12); | |
3176 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4, | |
3177 | htab->splt->contents + h->plt.offset + 16); | |
3178 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3179 | htab->splt->contents + h->plt.offset + 20); | |
3180 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3181 | htab->splt->contents + h->plt.offset + 24); | |
3182 | } | |
a85d7ed0 | 3183 | else |
0451c93c MS |
3184 | { |
3185 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0, | |
3186 | htab->splt->contents + h->plt.offset); | |
3187 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1, | |
3188 | htab->splt->contents + h->plt.offset + 4); | |
3189 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, | |
3190 | htab->splt->contents + h->plt.offset + 8); | |
3191 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, | |
3192 | htab->splt->contents + h->plt.offset + 12); | |
3193 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, | |
3194 | htab->splt->contents + h->plt.offset + 16); | |
3195 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), | |
3196 | htab->splt->contents + h->plt.offset + 20); | |
3197 | bfd_put_32 (output_bfd, got_offset, | |
3198 | htab->splt->contents + h->plt.offset + 24); | |
3199 | } | |
a85d7ed0 NC |
3200 | /* Insert offset into reloc. table here. */ |
3201 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
26e41594 | 3202 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3203 | |
3204 | /* Fill in the entry in the global offset table. | |
26e41594 | 3205 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3206 | bfd_put_32 (output_bfd, |
0451c93c MS |
3207 | (htab->splt->output_section->vma |
3208 | + htab->splt->output_offset | |
a85d7ed0 NC |
3209 | + h->plt.offset |
3210 | + 12), | |
0451c93c | 3211 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3212 | |
0451c93c MS |
3213 | /* Fill in the entry in the .rela.plt section. */ |
3214 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3215 | + htab->sgotplt->output_offset | |
3216 | + got_offset); | |
3217 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3218 | rela.r_addend = 0; | |
947216bf | 3219 | loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela); |
0451c93c | 3220 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
ec338859 | 3221 | |
f5385ebf | 3222 | if (!h->def_regular) |
a85d7ed0 NC |
3223 | { |
3224 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3225 | the .plt section. Leave the value alone. This is a clue |
3226 | for the dynamic linker, to make function pointer | |
3227 | comparisons work between an application and shared | |
ec338859 | 3228 | library. */ |
a85d7ed0 NC |
3229 | sym->st_shndx = SHN_UNDEF; |
3230 | } | |
3231 | } | |
ec338859 | 3232 | |
69fc87f1 MS |
3233 | if (h->got.offset != (bfd_vma) -1 |
3234 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3235 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3236 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3237 | { |
a85d7ed0 | 3238 | Elf_Internal_Rela rela; |
947216bf | 3239 | bfd_byte *loc; |
a85d7ed0 NC |
3240 | |
3241 | /* This symbol has an entry in the global offset table. Set it | |
26e41594 | 3242 | up. */ |
a85d7ed0 | 3243 | |
0451c93c MS |
3244 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3245 | abort (); | |
a85d7ed0 | 3246 | |
0451c93c MS |
3247 | rela.r_offset = (htab->sgot->output_section->vma |
3248 | + htab->sgot->output_offset | |
dc810e39 | 3249 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3250 | |
3251 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3252 | symbol is defined locally or was forced to be local because | |
3253 | of a version file, we just want to emit a RELATIVE reloc. | |
3254 | The entry in the global offset table will already have been | |
3255 | initialized in the relocate_section function. */ | |
0451c93c | 3256 | if (info->shared |
8c21ca21 | 3257 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
0451c93c | 3258 | { |
8c21ca21 AK |
3259 | if (!h->def_regular) |
3260 | return FALSE; | |
0451c93c MS |
3261 | BFD_ASSERT((h->got.offset & 1) != 0); |
3262 | rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); | |
3263 | rela.r_addend = (h->root.u.def.value | |
26e41594 AM |
3264 | + h->root.u.def.section->output_section->vma |
3265 | + h->root.u.def.section->output_offset); | |
3266 | } | |
a85d7ed0 NC |
3267 | else |
3268 | { | |
3269 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3270 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3271 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); |
26e41594 AM |
3272 | rela.r_addend = 0; |
3273 | } | |
a85d7ed0 | 3274 | |
947216bf AM |
3275 | loc = htab->srelgot->contents; |
3276 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 3277 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3278 | } |
3279 | ||
f5385ebf | 3280 | if (h->needs_copy) |
a85d7ed0 | 3281 | { |
a85d7ed0 | 3282 | Elf_Internal_Rela rela; |
947216bf | 3283 | bfd_byte *loc; |
a85d7ed0 NC |
3284 | |
3285 | /* This symbols needs a copy reloc. Set it up. */ | |
3286 | ||
0451c93c MS |
3287 | if (h->dynindx == -1 |
3288 | || (h->root.type != bfd_link_hash_defined | |
3289 | && h->root.type != bfd_link_hash_defweak) | |
3290 | || htab->srelbss == NULL) | |
3291 | abort (); | |
a85d7ed0 NC |
3292 | |
3293 | rela.r_offset = (h->root.u.def.value | |
3294 | + h->root.u.def.section->output_section->vma | |
3295 | + h->root.u.def.section->output_offset); | |
3296 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); | |
3297 | rela.r_addend = 0; | |
947216bf AM |
3298 | loc = htab->srelbss->contents; |
3299 | loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); | |
0451c93c | 3300 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3301 | } |
3302 | ||
3303 | /* Mark some specially defined symbols as absolute. */ | |
3304 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 RS |
3305 | || h == htab->elf.hgot |
3306 | || h == htab->elf.hplt) | |
a85d7ed0 NC |
3307 | sym->st_shndx = SHN_ABS; |
3308 | ||
b34976b6 | 3309 | return TRUE; |
a85d7ed0 NC |
3310 | } |
3311 | ||
0451c93c MS |
3312 | /* Used to decide how to sort relocs in an optimal manner for the |
3313 | dynamic linker, before writing them out. */ | |
3314 | ||
3315 | static enum elf_reloc_type_class | |
3316 | elf_s390_reloc_type_class (rela) | |
3317 | const Elf_Internal_Rela *rela; | |
3318 | { | |
3319 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3320 | { | |
3321 | case R_390_RELATIVE: | |
3322 | return reloc_class_relative; | |
3323 | case R_390_JMP_SLOT: | |
3324 | return reloc_class_plt; | |
3325 | case R_390_COPY: | |
3326 | return reloc_class_copy; | |
3327 | default: | |
3328 | return reloc_class_normal; | |
3329 | } | |
3330 | } | |
3331 | ||
a85d7ed0 NC |
3332 | /* Finish up the dynamic sections. */ |
3333 | ||
b34976b6 | 3334 | static bfd_boolean |
a85d7ed0 NC |
3335 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3336 | bfd *output_bfd; | |
3337 | struct bfd_link_info *info; | |
3338 | { | |
0451c93c | 3339 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3340 | bfd *dynobj; |
3341 | asection *sdyn; | |
a85d7ed0 | 3342 | |
0451c93c MS |
3343 | htab = elf_s390_hash_table (info); |
3344 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3345 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3346 | ||
0451c93c | 3347 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3348 | { |
a85d7ed0 NC |
3349 | Elf32_External_Dyn *dyncon, *dynconend; |
3350 | ||
0451c93c MS |
3351 | if (sdyn == NULL || htab->sgot == NULL) |
3352 | abort (); | |
a85d7ed0 NC |
3353 | |
3354 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 3355 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
a85d7ed0 NC |
3356 | for (; dyncon < dynconend; dyncon++) |
3357 | { | |
3358 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3359 | asection *s; |
ec338859 | 3360 | |
a85d7ed0 | 3361 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3362 | |
a85d7ed0 NC |
3363 | switch (dyn.d_tag) |
3364 | { | |
3365 | default: | |
0451c93c | 3366 | continue; |
ec338859 | 3367 | |
a85d7ed0 | 3368 | case DT_PLTGOT: |
0451c93c MS |
3369 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3370 | break; | |
ec338859 | 3371 | |
a85d7ed0 | 3372 | case DT_JMPREL: |
0451c93c | 3373 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 NC |
3374 | break; |
3375 | ||
3376 | case DT_PLTRELSZ: | |
0451c93c | 3377 | s = htab->srelplt->output_section; |
eea6121a | 3378 | dyn.d_un.d_val = s->size; |
a85d7ed0 NC |
3379 | break; |
3380 | } | |
0451c93c MS |
3381 | |
3382 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3383 | } |
3384 | ||
3385 | /* Fill in the special first entry in the procedure linkage table. */ | |
eea6121a | 3386 | if (htab->splt && htab->splt->size > 0) |
a85d7ed0 | 3387 | { |
26e41594 AM |
3388 | memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE); |
3389 | if (info->shared) | |
0451c93c | 3390 | { |
dc810e39 | 3391 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0, |
26e41594 | 3392 | htab->splt->contents ); |
dc810e39 | 3393 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1, |
26e41594 | 3394 | htab->splt->contents +4 ); |
dc810e39 | 3395 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2, |
26e41594 | 3396 | htab->splt->contents +8 ); |
dc810e39 | 3397 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3, |
26e41594 | 3398 | htab->splt->contents +12 ); |
dc810e39 | 3399 | bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4, |
26e41594 AM |
3400 | htab->splt->contents +16 ); |
3401 | } | |
3402 | else | |
3403 | { | |
3404 | bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0, | |
3405 | htab->splt->contents ); | |
3406 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3407 | htab->splt->contents +4 ); | |
3408 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2, | |
3409 | htab->splt->contents +8 ); | |
3410 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3411 | htab->splt->contents +12 ); | |
3412 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3413 | htab->splt->contents +16 ); | |
3414 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3415 | htab->splt->contents +20 ); | |
3416 | bfd_put_32 (output_bfd, | |
3417 | htab->sgotplt->output_section->vma | |
0451c93c | 3418 | + htab->sgotplt->output_offset, |
26e41594 AM |
3419 | htab->splt->contents + 24); |
3420 | } | |
0451c93c MS |
3421 | elf_section_data (htab->splt->output_section) |
3422 | ->this_hdr.sh_entsize = 4; | |
a85d7ed0 NC |
3423 | } |
3424 | ||
3425 | } | |
3426 | ||
0451c93c | 3427 | if (htab->sgotplt) |
a85d7ed0 | 3428 | { |
0451c93c | 3429 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3430 | if (htab->sgotplt->size > 0) |
0451c93c MS |
3431 | { |
3432 | bfd_put_32 (output_bfd, | |
3433 | (sdyn == NULL ? (bfd_vma) 0 | |
3434 | : sdyn->output_section->vma + sdyn->output_offset), | |
3435 | htab->sgotplt->contents); | |
3436 | /* One entry for shared object struct ptr. */ | |
3437 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
3438 | /* One entry for _dl_runtime_resolve. */ | |
3439 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3440 | } | |
a85d7ed0 | 3441 | |
0451c93c MS |
3442 | elf_section_data (htab->sgotplt->output_section) |
3443 | ->this_hdr.sh_entsize = 4; | |
3444 | } | |
b34976b6 | 3445 | return TRUE; |
a85d7ed0 NC |
3446 | } |
3447 | ||
b34976b6 | 3448 | static bfd_boolean |
979f4a38 NC |
3449 | elf_s390_grok_prstatus (abfd, note) |
3450 | bfd * abfd; | |
3451 | Elf_Internal_Note * note; | |
3452 | { | |
3453 | int offset; | |
eea6121a | 3454 | unsigned int size; |
979f4a38 NC |
3455 | |
3456 | switch (note->descsz) | |
3457 | { | |
3458 | default: | |
b34976b6 | 3459 | return FALSE; |
979f4a38 NC |
3460 | |
3461 | case 224: /* S/390 Linux. */ | |
3462 | /* pr_cursig */ | |
3463 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
3464 | ||
3465 | /* pr_pid */ | |
3466 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
3467 | ||
3468 | /* pr_reg */ | |
3469 | offset = 72; | |
eea6121a | 3470 | size = 144; |
979f4a38 NC |
3471 | break; |
3472 | } | |
3473 | ||
3474 | /* Make a ".reg/999" section. */ | |
3475 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 3476 | size, note->descpos + offset); |
979f4a38 NC |
3477 | } |
3478 | ||
4c45e5c9 JJ |
3479 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3480 | or (bfd_vma) -1 if it should not be included. */ | |
3481 | ||
3482 | static bfd_vma | |
3483 | elf_s390_plt_sym_val (bfd_vma i, const asection *plt, | |
3484 | const arelent *rel ATTRIBUTE_UNUSED) | |
3485 | { | |
3486 | return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; | |
3487 | } | |
3488 | ||
3489 | ||
a85d7ed0 NC |
3490 | #define TARGET_BIG_SYM bfd_elf32_s390_vec |
3491 | #define TARGET_BIG_NAME "elf32-s390" | |
3492 | #define ELF_ARCH bfd_arch_s390 | |
3493 | #define ELF_MACHINE_CODE EM_S390 | |
3494 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3495 | #define ELF_MAXPAGESIZE 0x1000 | |
3496 | ||
3497 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3498 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3499 | #define elf_backend_want_got_plt 1 |
3500 | #define elf_backend_plt_readonly 1 | |
3501 | #define elf_backend_want_plt_sym 0 | |
3502 | #define elf_backend_got_header_size 12 | |
b491616a | 3503 | #define elf_backend_rela_normal 1 |
a85d7ed0 | 3504 | |
26e41594 | 3505 | #define elf_info_to_howto elf_s390_info_to_howto |
a85d7ed0 | 3506 | |
a85d7ed0 NC |
3507 | #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name |
3508 | #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3509 | #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
157090f7 | 3510 | #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup |
a85d7ed0 NC |
3511 | |
3512 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
26e41594 | 3513 | #define elf_backend_check_relocs elf_s390_check_relocs |
0451c93c MS |
3514 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3515 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3516 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3517 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
26e41594 AM |
3518 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook |
3519 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3520 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
26e41594 | 3521 | #define elf_backend_relocate_section elf_s390_relocate_section |
a85d7ed0 | 3522 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections |
74541ad4 | 3523 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
29c2fb7c | 3524 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
979f4a38 | 3525 | #define elf_backend_grok_prstatus elf_s390_grok_prstatus |
4c45e5c9 | 3526 | #define elf_backend_plt_sym_val elf_s390_plt_sym_val |
a85d7ed0 | 3527 | |
69fc87f1 | 3528 | #define bfd_elf32_mkobject elf_s390_mkobject |
26e41594 | 3529 | #define elf_backend_object_p elf_s390_object_p |
a85d7ed0 NC |
3530 | |
3531 | #include "elf32-target.h" |