Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Motorola 68k series support for 32-bit ELF |
b2a8e766 | 2 | Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
3eb128b2 | 3 | 2004, 2005 Free Software Foundation, Inc. |
252b5132 | 4 | |
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
252b5132 | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
3e110533 | 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
252b5132 RH |
20 | |
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf/m68k.h" | |
27 | ||
28 | static reloc_howto_type *reloc_type_lookup | |
29 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
30 | static void rtype_to_howto | |
947216bf | 31 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
252b5132 RH |
32 | static struct bfd_hash_entry *elf_m68k_link_hash_newfunc |
33 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
34 | static struct bfd_link_hash_table *elf_m68k_link_hash_table_create | |
35 | PARAMS ((bfd *)); | |
b34976b6 | 36 | static bfd_boolean elf_m68k_check_relocs |
252b5132 RH |
37 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
38 | const Elf_Internal_Rela *)); | |
39 | static asection *elf_m68k_gc_mark_hook | |
1e2f5b6e | 40 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
252b5132 | 41 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 42 | static bfd_boolean elf_m68k_gc_sweep_hook |
252b5132 RH |
43 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
44 | const Elf_Internal_Rela *)); | |
b34976b6 | 45 | static bfd_boolean elf_m68k_adjust_dynamic_symbol |
252b5132 | 46 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 47 | static bfd_boolean elf_m68k_size_dynamic_sections |
252b5132 | 48 | PARAMS ((bfd *, struct bfd_link_info *)); |
0cca5f05 AS |
49 | static bfd_boolean elf_m68k_discard_copies |
50 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
b34976b6 | 51 | static bfd_boolean elf_m68k_relocate_section |
252b5132 RH |
52 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
53 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 54 | static bfd_boolean elf_m68k_finish_dynamic_symbol |
252b5132 RH |
55 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
56 | Elf_Internal_Sym *)); | |
b34976b6 | 57 | static bfd_boolean elf_m68k_finish_dynamic_sections |
252b5132 RH |
58 | PARAMS ((bfd *, struct bfd_link_info *)); |
59 | ||
b34976b6 | 60 | static bfd_boolean elf32_m68k_set_private_flags |
9e1281c7 | 61 | PARAMS ((bfd *, flagword)); |
b34976b6 | 62 | static bfd_boolean elf32_m68k_merge_private_bfd_data |
9e1281c7 | 63 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 64 | static bfd_boolean elf32_m68k_print_private_bfd_data |
9e1281c7 | 65 | PARAMS ((bfd *, PTR)); |
aa91b392 | 66 | static enum elf_reloc_type_class elf32_m68k_reloc_type_class |
f51e552e | 67 | PARAMS ((const Elf_Internal_Rela *)); |
9e1281c7 | 68 | |
252b5132 | 69 | static reloc_howto_type howto_table[] = { |
b34976b6 AM |
70 | HOWTO(R_68K_NONE, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE), |
71 | HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE), | |
72 | HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE), | |
73 | HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE), | |
74 | HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE), | |
75 | HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE), | |
76 | HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE), | |
77 | HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE), | |
78 | HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE), | |
79 | HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE), | |
80 | HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE), | |
81 | HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE), | |
82 | HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE), | |
83 | HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE), | |
84 | HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE), | |
85 | HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE), | |
86 | HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE), | |
87 | HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE), | |
88 | HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE), | |
89 | HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE), | |
90 | HOWTO(R_68K_GLOB_DAT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_GLOB_DAT", FALSE, 0, 0xffffffff,FALSE), | |
91 | HOWTO(R_68K_JMP_SLOT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_JMP_SLOT", FALSE, 0, 0xffffffff,FALSE), | |
92 | HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE), | |
ae9a127f | 93 | /* GNU extension to record C++ vtable hierarchy. */ |
252b5132 RH |
94 | HOWTO (R_68K_GNU_VTINHERIT, /* type */ |
95 | 0, /* rightshift */ | |
96 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
97 | 0, /* bitsize */ | |
b34976b6 | 98 | FALSE, /* pc_relative */ |
252b5132 RH |
99 | 0, /* bitpos */ |
100 | complain_overflow_dont, /* complain_on_overflow */ | |
101 | NULL, /* special_function */ | |
102 | "R_68K_GNU_VTINHERIT", /* name */ | |
b34976b6 | 103 | FALSE, /* partial_inplace */ |
252b5132 RH |
104 | 0, /* src_mask */ |
105 | 0, /* dst_mask */ | |
b34976b6 | 106 | FALSE), |
ae9a127f | 107 | /* GNU extension to record C++ vtable member usage. */ |
252b5132 RH |
108 | HOWTO (R_68K_GNU_VTENTRY, /* type */ |
109 | 0, /* rightshift */ | |
110 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
111 | 0, /* bitsize */ | |
b34976b6 | 112 | FALSE, /* pc_relative */ |
252b5132 RH |
113 | 0, /* bitpos */ |
114 | complain_overflow_dont, /* complain_on_overflow */ | |
115 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
116 | "R_68K_GNU_VTENTRY", /* name */ | |
b34976b6 | 117 | FALSE, /* partial_inplace */ |
252b5132 RH |
118 | 0, /* src_mask */ |
119 | 0, /* dst_mask */ | |
b34976b6 | 120 | FALSE), |
252b5132 RH |
121 | }; |
122 | ||
123 | static void | |
124 | rtype_to_howto (abfd, cache_ptr, dst) | |
121089cb | 125 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
126 | arelent *cache_ptr; |
127 | Elf_Internal_Rela *dst; | |
128 | { | |
129 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K_max); | |
130 | cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; | |
131 | } | |
132 | ||
133 | #define elf_info_to_howto rtype_to_howto | |
134 | ||
135 | static const struct | |
136 | { | |
137 | bfd_reloc_code_real_type bfd_val; | |
138 | int elf_val; | |
139 | } reloc_map[] = { | |
140 | { BFD_RELOC_NONE, R_68K_NONE }, | |
141 | { BFD_RELOC_32, R_68K_32 }, | |
142 | { BFD_RELOC_16, R_68K_16 }, | |
143 | { BFD_RELOC_8, R_68K_8 }, | |
144 | { BFD_RELOC_32_PCREL, R_68K_PC32 }, | |
145 | { BFD_RELOC_16_PCREL, R_68K_PC16 }, | |
146 | { BFD_RELOC_8_PCREL, R_68K_PC8 }, | |
147 | { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, | |
148 | { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, | |
149 | { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, | |
150 | { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, | |
151 | { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, | |
152 | { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, | |
153 | { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, | |
154 | { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, | |
155 | { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, | |
156 | { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, | |
157 | { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, | |
158 | { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, | |
159 | { BFD_RELOC_NONE, R_68K_COPY }, | |
160 | { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, | |
161 | { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, | |
162 | { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, | |
163 | { BFD_RELOC_CTOR, R_68K_32 }, | |
164 | { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT }, | |
165 | { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY }, | |
166 | }; | |
167 | ||
168 | static reloc_howto_type * | |
169 | reloc_type_lookup (abfd, code) | |
121089cb | 170 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
171 | bfd_reloc_code_real_type code; |
172 | { | |
173 | unsigned int i; | |
174 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) | |
175 | { | |
176 | if (reloc_map[i].bfd_val == code) | |
177 | return &howto_table[reloc_map[i].elf_val]; | |
178 | } | |
179 | return 0; | |
180 | } | |
181 | ||
182 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup | |
183 | #define ELF_ARCH bfd_arch_m68k | |
252b5132 RH |
184 | \f |
185 | /* Functions for the m68k ELF linker. */ | |
186 | ||
187 | /* The name of the dynamic interpreter. This is put in the .interp | |
188 | section. */ | |
189 | ||
190 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
191 | ||
192 | /* The size in bytes of an entry in the procedure linkage table. */ | |
193 | ||
194 | #define PLT_ENTRY_SIZE 20 | |
195 | ||
196 | /* The first entry in a procedure linkage table looks like this. See | |
197 | the SVR4 ABI m68k supplement to see how this works. */ | |
198 | ||
199 | static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = | |
200 | { | |
201 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ | |
202 | 0, 0, 0, 0, /* replaced with offset to .got + 4. */ | |
203 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ | |
204 | 0, 0, 0, 0, /* replaced with offset to .got + 8. */ | |
205 | 0, 0, 0, 0 /* pad out to 20 bytes. */ | |
206 | }; | |
207 | ||
208 | /* Subsequent entries in a procedure linkage table look like this. */ | |
209 | ||
210 | static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = | |
211 | { | |
212 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */ | |
213 | 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */ | |
214 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
215 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
216 | 0x60, 0xff, /* bra.l .plt */ | |
217 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
218 | }; | |
219 | ||
238d258f NC |
220 | |
221 | #define CFV4E_PLT_ENTRY_SIZE 24 | |
222 | ||
223 | #define CFV4E_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_CFV4E) | |
224 | ||
225 | static const bfd_byte elf_cfv4e_plt0_entry[CFV4E_PLT_ENTRY_SIZE] = | |
226 | { | |
227 | 0x20, 0x3c, | |
228 | 0, 0, 0, 0, /* Replaced with offset to .got + 4. */ | |
229 | 0x2f, 0x3b, 0x08, 0xfa, /* move.l (%pc,addr),-(%sp) */ | |
230 | 0x20, 0x3c, | |
231 | 0, 0, 0, 0, /* Replaced with offset to .got + 8. */ | |
232 | 0x20, 0x7b, 0x08, 0x00, /* move.l (%pc,%d0:l), %a0 */ | |
233 | 0x4e, 0xd0, /* jmp (%a0) */ | |
234 | 0x4e, 0x71 /* nop */ | |
235 | }; | |
236 | ||
237 | /* Subsequent entries in a procedure linkage table look like this. */ | |
238 | ||
239 | static const bfd_byte elf_cfv4e_plt_entry[CFV4E_PLT_ENTRY_SIZE] = | |
240 | { | |
241 | 0x20, 0x3c, | |
242 | 0, 0, 0, 0, /* Replaced with offset to symbol's .got entry. */ | |
243 | 0x20, 0x7b, 0x08, 0x00, /* move.l (%pc,%d0:l), %a0 */ | |
244 | 0x4e, 0xd0, /* jmp (%a0) */ | |
245 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
246 | 0, 0, 0, 0, /* Replaced with offset into relocation table. */ | |
247 | 0x60, 0xff, /* bra.l .plt */ | |
248 | 0, 0, 0, 0 /* Replaced with offset to start of .plt. */ | |
249 | }; | |
250 | ||
9e1281c7 CM |
251 | #define CPU32_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_CPU32) |
252 | ||
253 | #define PLT_CPU32_ENTRY_SIZE 24 | |
254 | /* Procedure linkage table entries for the cpu32 */ | |
255 | static const bfd_byte elf_cpu32_plt0_entry[PLT_CPU32_ENTRY_SIZE] = | |
256 | { | |
6091b433 | 257 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ |
9e1281c7 | 258 | 0, 0, 0, 0, /* replaced with offset to .got + 4. */ |
6091b433 | 259 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
c3668558 | 260 | 0, 0, 0, 0, /* replace with offset to .got +8. */ |
6091b433 | 261 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
262 | 0, 0, 0, 0, /* pad out to 24 bytes. */ |
263 | 0, 0 | |
264 | }; | |
265 | ||
266 | static const bfd_byte elf_cpu32_plt_entry[PLT_CPU32_ENTRY_SIZE] = | |
267 | { | |
1ca42bad | 268 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
9e1281c7 | 269 | 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */ |
1ca42bad | 270 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
271 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
272 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
273 | 0x60, 0xff, /* bra.l .plt */ | |
274 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
275 | 0, 0 | |
276 | }; | |
277 | ||
252b5132 RH |
278 | /* The m68k linker needs to keep track of the number of relocs that it |
279 | decides to copy in check_relocs for each symbol. This is so that it | |
280 | can discard PC relative relocs if it doesn't need them when linking | |
281 | with -Bsymbolic. We store the information in a field extending the | |
282 | regular ELF linker hash table. */ | |
283 | ||
284 | /* This structure keeps track of the number of PC relative relocs we have | |
285 | copied for a given symbol. */ | |
286 | ||
287 | struct elf_m68k_pcrel_relocs_copied | |
288 | { | |
289 | /* Next section. */ | |
290 | struct elf_m68k_pcrel_relocs_copied *next; | |
291 | /* A section in dynobj. */ | |
292 | asection *section; | |
293 | /* Number of relocs copied in this section. */ | |
294 | bfd_size_type count; | |
295 | }; | |
296 | ||
297 | /* m68k ELF linker hash entry. */ | |
298 | ||
299 | struct elf_m68k_link_hash_entry | |
300 | { | |
301 | struct elf_link_hash_entry root; | |
302 | ||
303 | /* Number of PC relative relocs copied for this symbol. */ | |
304 | struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied; | |
305 | }; | |
306 | ||
0cca5f05 AS |
307 | #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent)) |
308 | ||
252b5132 RH |
309 | /* m68k ELF linker hash table. */ |
310 | ||
311 | struct elf_m68k_link_hash_table | |
312 | { | |
313 | struct elf_link_hash_table root; | |
b6152c34 AS |
314 | |
315 | /* Small local sym to section mapping cache. */ | |
316 | struct sym_sec_cache sym_sec; | |
252b5132 RH |
317 | }; |
318 | ||
252b5132 RH |
319 | /* Get the m68k ELF linker hash table from a link_info structure. */ |
320 | ||
321 | #define elf_m68k_hash_table(p) \ | |
322 | ((struct elf_m68k_link_hash_table *) (p)->hash) | |
323 | ||
324 | /* Create an entry in an m68k ELF linker hash table. */ | |
325 | ||
326 | static struct bfd_hash_entry * | |
327 | elf_m68k_link_hash_newfunc (entry, table, string) | |
328 | struct bfd_hash_entry *entry; | |
329 | struct bfd_hash_table *table; | |
330 | const char *string; | |
331 | { | |
0cca5f05 | 332 | struct bfd_hash_entry *ret = entry; |
252b5132 RH |
333 | |
334 | /* Allocate the structure if it has not already been allocated by a | |
335 | subclass. */ | |
0cca5f05 AS |
336 | if (ret == NULL) |
337 | ret = bfd_hash_allocate (table, | |
338 | sizeof (struct elf_m68k_link_hash_entry)); | |
339 | if (ret == NULL) | |
340 | return ret; | |
252b5132 RH |
341 | |
342 | /* Call the allocation method of the superclass. */ | |
0cca5f05 AS |
343 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); |
344 | if (ret != NULL) | |
345 | elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL; | |
252b5132 | 346 | |
0cca5f05 | 347 | return ret; |
252b5132 RH |
348 | } |
349 | ||
350 | /* Create an m68k ELF linker hash table. */ | |
351 | ||
352 | static struct bfd_link_hash_table * | |
353 | elf_m68k_link_hash_table_create (abfd) | |
354 | bfd *abfd; | |
355 | { | |
356 | struct elf_m68k_link_hash_table *ret; | |
dc810e39 | 357 | bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table); |
252b5132 | 358 | |
e2d34d7d | 359 | ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
360 | if (ret == (struct elf_m68k_link_hash_table *) NULL) |
361 | return NULL; | |
362 | ||
363 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
364 | elf_m68k_link_hash_newfunc)) | |
365 | { | |
e2d34d7d | 366 | free (ret); |
252b5132 RH |
367 | return NULL; |
368 | } | |
369 | ||
b6152c34 AS |
370 | ret->sym_sec.abfd = NULL; |
371 | ||
252b5132 RH |
372 | return &ret->root.root; |
373 | } | |
374 | ||
ae9a127f | 375 | /* Keep m68k-specific flags in the ELF header. */ |
b34976b6 | 376 | static bfd_boolean |
9e1281c7 CM |
377 | elf32_m68k_set_private_flags (abfd, flags) |
378 | bfd *abfd; | |
379 | flagword flags; | |
380 | { | |
381 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 AM |
382 | elf_flags_init (abfd) = TRUE; |
383 | return TRUE; | |
9e1281c7 CM |
384 | } |
385 | ||
9e1281c7 CM |
386 | /* Merge backend specific data from an object file to the output |
387 | object file when linking. */ | |
b34976b6 | 388 | static bfd_boolean |
9e1281c7 CM |
389 | elf32_m68k_merge_private_bfd_data (ibfd, obfd) |
390 | bfd *ibfd; | |
391 | bfd *obfd; | |
392 | { | |
393 | flagword out_flags; | |
394 | flagword in_flags; | |
395 | ||
396 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
397 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
b34976b6 | 398 | return TRUE; |
9e1281c7 CM |
399 | |
400 | in_flags = elf_elfheader (ibfd)->e_flags; | |
401 | out_flags = elf_elfheader (obfd)->e_flags; | |
402 | ||
403 | if (!elf_flags_init (obfd)) | |
404 | { | |
b34976b6 | 405 | elf_flags_init (obfd) = TRUE; |
9e1281c7 CM |
406 | elf_elfheader (obfd)->e_flags = in_flags; |
407 | } | |
408 | ||
b34976b6 | 409 | return TRUE; |
9e1281c7 CM |
410 | } |
411 | ||
ae9a127f | 412 | /* Display the flags field. */ |
b34976b6 | 413 | static bfd_boolean |
9e1281c7 CM |
414 | elf32_m68k_print_private_bfd_data (abfd, ptr) |
415 | bfd *abfd; | |
416 | PTR ptr; | |
417 | { | |
418 | FILE *file = (FILE *) ptr; | |
419 | ||
420 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
421 | ||
422 | /* Print normal ELF private data. */ | |
423 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
424 | ||
425 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ | |
426 | ||
427 | /* xgettext:c-format */ | |
517662d4 | 428 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
9e1281c7 CM |
429 | |
430 | if (elf_elfheader (abfd)->e_flags & EF_CPU32) | |
517662d4 | 431 | fprintf (file, _(" [cpu32]")); |
9e1281c7 | 432 | |
76f57f3a | 433 | if (elf_elfheader (abfd)->e_flags & EF_M68000) |
428d0de3 | 434 | fprintf (file, _(" [m68000]")); |
76f57f3a | 435 | |
9e1281c7 CM |
436 | fputc ('\n', file); |
437 | ||
b34976b6 | 438 | return TRUE; |
9e1281c7 | 439 | } |
252b5132 RH |
440 | /* Look through the relocs for a section during the first phase, and |
441 | allocate space in the global offset table or procedure linkage | |
442 | table. */ | |
443 | ||
b34976b6 | 444 | static bfd_boolean |
252b5132 RH |
445 | elf_m68k_check_relocs (abfd, info, sec, relocs) |
446 | bfd *abfd; | |
447 | struct bfd_link_info *info; | |
448 | asection *sec; | |
449 | const Elf_Internal_Rela *relocs; | |
450 | { | |
451 | bfd *dynobj; | |
452 | Elf_Internal_Shdr *symtab_hdr; | |
453 | struct elf_link_hash_entry **sym_hashes; | |
454 | bfd_signed_vma *local_got_refcounts; | |
455 | const Elf_Internal_Rela *rel; | |
456 | const Elf_Internal_Rela *rel_end; | |
457 | asection *sgot; | |
458 | asection *srelgot; | |
459 | asection *sreloc; | |
460 | ||
1049f94e | 461 | if (info->relocatable) |
b34976b6 | 462 | return TRUE; |
252b5132 RH |
463 | |
464 | dynobj = elf_hash_table (info)->dynobj; | |
465 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
466 | sym_hashes = elf_sym_hashes (abfd); | |
467 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
468 | ||
469 | sgot = NULL; | |
470 | srelgot = NULL; | |
471 | sreloc = NULL; | |
472 | ||
473 | rel_end = relocs + sec->reloc_count; | |
474 | for (rel = relocs; rel < rel_end; rel++) | |
475 | { | |
476 | unsigned long r_symndx; | |
477 | struct elf_link_hash_entry *h; | |
478 | ||
479 | r_symndx = ELF32_R_SYM (rel->r_info); | |
480 | ||
481 | if (r_symndx < symtab_hdr->sh_info) | |
482 | h = NULL; | |
483 | else | |
973a3492 L |
484 | { |
485 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
486 | while (h->root.type == bfd_link_hash_indirect | |
487 | || h->root.type == bfd_link_hash_warning) | |
488 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
489 | } | |
252b5132 RH |
490 | |
491 | switch (ELF32_R_TYPE (rel->r_info)) | |
492 | { | |
493 | case R_68K_GOT8: | |
494 | case R_68K_GOT16: | |
495 | case R_68K_GOT32: | |
496 | if (h != NULL | |
497 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
498 | break; | |
499 | /* Fall through. */ | |
500 | case R_68K_GOT8O: | |
501 | case R_68K_GOT16O: | |
502 | case R_68K_GOT32O: | |
503 | /* This symbol requires a global offset table entry. */ | |
504 | ||
505 | if (dynobj == NULL) | |
506 | { | |
507 | /* Create the .got section. */ | |
508 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
509 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 510 | return FALSE; |
252b5132 RH |
511 | } |
512 | ||
513 | if (sgot == NULL) | |
514 | { | |
515 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
516 | BFD_ASSERT (sgot != NULL); | |
517 | } | |
518 | ||
519 | if (srelgot == NULL | |
520 | && (h != NULL || info->shared)) | |
521 | { | |
522 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
523 | if (srelgot == NULL) | |
524 | { | |
3496cb2a L |
525 | srelgot = bfd_make_section_with_flags (dynobj, |
526 | ".rela.got", | |
527 | (SEC_ALLOC | |
528 | | SEC_LOAD | |
529 | | SEC_HAS_CONTENTS | |
530 | | SEC_IN_MEMORY | |
531 | | SEC_LINKER_CREATED | |
532 | | SEC_READONLY)); | |
252b5132 | 533 | if (srelgot == NULL |
252b5132 | 534 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) |
b34976b6 | 535 | return FALSE; |
252b5132 RH |
536 | } |
537 | } | |
538 | ||
539 | if (h != NULL) | |
540 | { | |
51b64d56 | 541 | if (h->got.refcount == 0) |
252b5132 | 542 | { |
252b5132 | 543 | /* Make sure this symbol is output as a dynamic symbol. */ |
b6152c34 | 544 | if (h->dynindx == -1 |
f5385ebf | 545 | && !h->forced_local) |
252b5132 | 546 | { |
c152c796 | 547 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 548 | return FALSE; |
252b5132 RH |
549 | } |
550 | ||
551 | /* Allocate space in the .got section. */ | |
eea6121a | 552 | sgot->size += 4; |
252b5132 | 553 | /* Allocate relocation space. */ |
eea6121a | 554 | srelgot->size += sizeof (Elf32_External_Rela); |
252b5132 | 555 | } |
51b64d56 | 556 | h->got.refcount++; |
252b5132 RH |
557 | } |
558 | else | |
559 | { | |
560 | /* This is a global offset table entry for a local symbol. */ | |
561 | if (local_got_refcounts == NULL) | |
562 | { | |
dc810e39 | 563 | bfd_size_type size; |
252b5132 | 564 | |
dc810e39 AM |
565 | size = symtab_hdr->sh_info; |
566 | size *= sizeof (bfd_signed_vma); | |
252b5132 | 567 | local_got_refcounts = ((bfd_signed_vma *) |
51b64d56 | 568 | bfd_zalloc (abfd, size)); |
252b5132 | 569 | if (local_got_refcounts == NULL) |
b34976b6 | 570 | return FALSE; |
252b5132 | 571 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 572 | } |
51b64d56 | 573 | if (local_got_refcounts[r_symndx] == 0) |
252b5132 | 574 | { |
eea6121a | 575 | sgot->size += 4; |
252b5132 RH |
576 | if (info->shared) |
577 | { | |
578 | /* If we are generating a shared object, we need to | |
579 | output a R_68K_RELATIVE reloc so that the dynamic | |
580 | linker can adjust this GOT entry. */ | |
eea6121a | 581 | srelgot->size += sizeof (Elf32_External_Rela); |
252b5132 RH |
582 | } |
583 | } | |
51b64d56 | 584 | local_got_refcounts[r_symndx]++; |
252b5132 RH |
585 | } |
586 | break; | |
587 | ||
588 | case R_68K_PLT8: | |
589 | case R_68K_PLT16: | |
590 | case R_68K_PLT32: | |
591 | /* This symbol requires a procedure linkage table entry. We | |
592 | actually build the entry in adjust_dynamic_symbol, | |
593 | because this might be a case of linking PIC code which is | |
594 | never referenced by a dynamic object, in which case we | |
595 | don't need to generate a procedure linkage table entry | |
596 | after all. */ | |
597 | ||
598 | /* If this is a local symbol, we resolve it directly without | |
599 | creating a procedure linkage table entry. */ | |
600 | if (h == NULL) | |
601 | continue; | |
602 | ||
f5385ebf | 603 | h->needs_plt = 1; |
51b64d56 | 604 | h->plt.refcount++; |
252b5132 RH |
605 | break; |
606 | ||
607 | case R_68K_PLT8O: | |
608 | case R_68K_PLT16O: | |
609 | case R_68K_PLT32O: | |
610 | /* This symbol requires a procedure linkage table entry. */ | |
611 | ||
612 | if (h == NULL) | |
613 | { | |
614 | /* It does not make sense to have this relocation for a | |
615 | local symbol. FIXME: does it? How to handle it if | |
616 | it does make sense? */ | |
617 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 618 | return FALSE; |
252b5132 RH |
619 | } |
620 | ||
621 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 | 622 | if (h->dynindx == -1 |
f5385ebf | 623 | && !h->forced_local) |
252b5132 | 624 | { |
c152c796 | 625 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 626 | return FALSE; |
252b5132 RH |
627 | } |
628 | ||
f5385ebf | 629 | h->needs_plt = 1; |
51b64d56 | 630 | h->plt.refcount++; |
252b5132 RH |
631 | break; |
632 | ||
633 | case R_68K_PC8: | |
634 | case R_68K_PC16: | |
635 | case R_68K_PC32: | |
636 | /* If we are creating a shared library and this is not a local | |
637 | symbol, we need to copy the reloc into the shared library. | |
638 | However when linking with -Bsymbolic and this is a global | |
639 | symbol which is defined in an object we are including in the | |
640 | link (i.e., DEF_REGULAR is set), then we can resolve the | |
641 | reloc directly. At this point we have not seen all the input | |
642 | files, so it is possible that DEF_REGULAR is not set now but | |
643 | will be set later (it is never cleared). We account for that | |
644 | possibility below by storing information in the | |
645 | pcrel_relocs_copied field of the hash table entry. */ | |
646 | if (!(info->shared | |
647 | && (sec->flags & SEC_ALLOC) != 0 | |
648 | && h != NULL | |
649 | && (!info->symbolic | |
b6152c34 | 650 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 651 | || !h->def_regular))) |
252b5132 RH |
652 | { |
653 | if (h != NULL) | |
654 | { | |
655 | /* Make sure a plt entry is created for this symbol if | |
656 | it turns out to be a function defined by a dynamic | |
657 | object. */ | |
51b64d56 | 658 | h->plt.refcount++; |
252b5132 RH |
659 | } |
660 | break; | |
661 | } | |
662 | /* Fall through. */ | |
663 | case R_68K_8: | |
664 | case R_68K_16: | |
665 | case R_68K_32: | |
666 | if (h != NULL) | |
667 | { | |
668 | /* Make sure a plt entry is created for this symbol if it | |
669 | turns out to be a function defined by a dynamic object. */ | |
51b64d56 | 670 | h->plt.refcount++; |
252b5132 RH |
671 | } |
672 | ||
673 | /* If we are creating a shared library, we need to copy the | |
674 | reloc into the shared library. */ | |
675 | if (info->shared | |
676 | && (sec->flags & SEC_ALLOC) != 0) | |
677 | { | |
678 | /* When creating a shared object, we must copy these | |
679 | reloc types into the output file. We create a reloc | |
680 | section in dynobj and make room for this reloc. */ | |
681 | if (sreloc == NULL) | |
682 | { | |
683 | const char *name; | |
684 | ||
685 | name = (bfd_elf_string_from_elf_section | |
686 | (abfd, | |
687 | elf_elfheader (abfd)->e_shstrndx, | |
688 | elf_section_data (sec)->rel_hdr.sh_name)); | |
689 | if (name == NULL) | |
b34976b6 | 690 | return FALSE; |
252b5132 RH |
691 | |
692 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
693 | && strcmp (bfd_get_section_name (abfd, sec), | |
694 | name + 5) == 0); | |
695 | ||
696 | sreloc = bfd_get_section_by_name (dynobj, name); | |
697 | if (sreloc == NULL) | |
698 | { | |
3496cb2a L |
699 | sreloc = bfd_make_section_with_flags (dynobj, |
700 | name, | |
701 | (SEC_ALLOC | |
702 | | SEC_LOAD | |
703 | | SEC_HAS_CONTENTS | |
704 | | SEC_IN_MEMORY | |
705 | | SEC_LINKER_CREATED | |
706 | | SEC_READONLY)); | |
252b5132 | 707 | if (sreloc == NULL |
252b5132 | 708 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) |
b34976b6 | 709 | return FALSE; |
252b5132 | 710 | } |
d2ff124f | 711 | elf_section_data (sec)->sreloc = sreloc; |
252b5132 RH |
712 | } |
713 | ||
3e829b4a AS |
714 | if (sec->flags & SEC_READONLY |
715 | /* Don't set DF_TEXTREL yet for PC relative | |
716 | relocations, they might be discarded later. */ | |
717 | && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8 | |
718 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
719 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)) | |
720 | info->flags |= DF_TEXTREL; | |
721 | ||
eea6121a | 722 | sreloc->size += sizeof (Elf32_External_Rela); |
252b5132 | 723 | |
b6152c34 AS |
724 | /* We count the number of PC relative relocations we have |
725 | entered for this symbol, so that we can discard them | |
726 | again if, in the -Bsymbolic case, the symbol is later | |
727 | defined by a regular object, or, in the normal shared | |
728 | case, the symbol is forced to be local. Note that this | |
729 | function is only called if we are using an m68kelf linker | |
730 | hash table, which means that h is really a pointer to an | |
252b5132 | 731 | elf_m68k_link_hash_entry. */ |
b6152c34 AS |
732 | if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8 |
733 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
734 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) | |
252b5132 | 735 | { |
252b5132 | 736 | struct elf_m68k_pcrel_relocs_copied *p; |
b6152c34 AS |
737 | struct elf_m68k_pcrel_relocs_copied **head; |
738 | ||
739 | if (h != NULL) | |
740 | { | |
741 | struct elf_m68k_link_hash_entry *eh | |
0cca5f05 | 742 | = elf_m68k_hash_entry (h); |
b6152c34 AS |
743 | head = &eh->pcrel_relocs_copied; |
744 | } | |
745 | else | |
746 | { | |
747 | asection *s; | |
6edfbbad DJ |
748 | void *vpp; |
749 | ||
b6152c34 AS |
750 | s = (bfd_section_from_r_symndx |
751 | (abfd, &elf_m68k_hash_table (info)->sym_sec, | |
752 | sec, r_symndx)); | |
753 | if (s == NULL) | |
754 | return FALSE; | |
252b5132 | 755 | |
6edfbbad DJ |
756 | vpp = &elf_section_data (s)->local_dynrel; |
757 | head = (struct elf_m68k_pcrel_relocs_copied **) vpp; | |
b6152c34 | 758 | } |
252b5132 | 759 | |
b6152c34 | 760 | for (p = *head; p != NULL; p = p->next) |
252b5132 RH |
761 | if (p->section == sreloc) |
762 | break; | |
763 | ||
764 | if (p == NULL) | |
765 | { | |
766 | p = ((struct elf_m68k_pcrel_relocs_copied *) | |
dc810e39 | 767 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
252b5132 | 768 | if (p == NULL) |
b34976b6 | 769 | return FALSE; |
b6152c34 AS |
770 | p->next = *head; |
771 | *head = p; | |
252b5132 RH |
772 | p->section = sreloc; |
773 | p->count = 0; | |
774 | } | |
775 | ||
776 | ++p->count; | |
777 | } | |
778 | } | |
779 | ||
780 | break; | |
781 | ||
782 | /* This relocation describes the C++ object vtable hierarchy. | |
783 | Reconstruct it for later use during GC. */ | |
784 | case R_68K_GNU_VTINHERIT: | |
c152c796 | 785 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 786 | return FALSE; |
252b5132 RH |
787 | break; |
788 | ||
789 | /* This relocation describes which C++ vtable entries are actually | |
790 | used. Record for later use during GC. */ | |
791 | case R_68K_GNU_VTENTRY: | |
c152c796 | 792 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 793 | return FALSE; |
252b5132 RH |
794 | break; |
795 | ||
796 | default: | |
797 | break; | |
798 | } | |
799 | } | |
800 | ||
b34976b6 | 801 | return TRUE; |
252b5132 RH |
802 | } |
803 | ||
804 | /* Return the section that should be marked against GC for a given | |
805 | relocation. */ | |
806 | ||
807 | static asection * | |
1e2f5b6e AM |
808 | elf_m68k_gc_mark_hook (sec, info, rel, h, sym) |
809 | asection *sec; | |
121089cb | 810 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
811 | Elf_Internal_Rela *rel; |
812 | struct elf_link_hash_entry *h; | |
813 | Elf_Internal_Sym *sym; | |
814 | { | |
815 | if (h != NULL) | |
816 | { | |
817 | switch (ELF32_R_TYPE (rel->r_info)) | |
818 | { | |
819 | case R_68K_GNU_VTINHERIT: | |
820 | case R_68K_GNU_VTENTRY: | |
821 | break; | |
822 | ||
823 | default: | |
824 | switch (h->root.type) | |
825 | { | |
826 | default: | |
827 | break; | |
828 | ||
829 | case bfd_link_hash_defined: | |
830 | case bfd_link_hash_defweak: | |
831 | return h->root.u.def.section; | |
832 | ||
833 | case bfd_link_hash_common: | |
834 | return h->root.u.c.p->section; | |
835 | } | |
836 | } | |
837 | } | |
838 | else | |
1e2f5b6e | 839 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
252b5132 RH |
840 | |
841 | return NULL; | |
842 | } | |
843 | ||
844 | /* Update the got entry reference counts for the section being removed. */ | |
845 | ||
b34976b6 | 846 | static bfd_boolean |
252b5132 RH |
847 | elf_m68k_gc_sweep_hook (abfd, info, sec, relocs) |
848 | bfd *abfd; | |
849 | struct bfd_link_info *info; | |
850 | asection *sec; | |
851 | const Elf_Internal_Rela *relocs; | |
852 | { | |
853 | Elf_Internal_Shdr *symtab_hdr; | |
854 | struct elf_link_hash_entry **sym_hashes; | |
855 | bfd_signed_vma *local_got_refcounts; | |
856 | const Elf_Internal_Rela *rel, *relend; | |
252b5132 | 857 | bfd *dynobj; |
dd5724d5 AM |
858 | asection *sgot; |
859 | asection *srelgot; | |
252b5132 | 860 | |
252b5132 | 861 | dynobj = elf_hash_table (info)->dynobj; |
dd5724d5 | 862 | if (dynobj == NULL) |
b34976b6 | 863 | return TRUE; |
dd5724d5 | 864 | |
4f075348 KH |
865 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
866 | sym_hashes = elf_sym_hashes (abfd); | |
867 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
868 | ||
dd5724d5 AM |
869 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
870 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
252b5132 RH |
871 | |
872 | relend = relocs + sec->reloc_count; | |
873 | for (rel = relocs; rel < relend; rel++) | |
874 | { | |
4f075348 | 875 | unsigned long r_symndx; |
3eb128b2 AM |
876 | struct elf_link_hash_entry *h = NULL; |
877 | ||
878 | r_symndx = ELF32_R_SYM (rel->r_info); | |
879 | if (r_symndx >= symtab_hdr->sh_info) | |
880 | { | |
881 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
882 | while (h->root.type == bfd_link_hash_indirect | |
883 | || h->root.type == bfd_link_hash_warning) | |
884 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
885 | } | |
4f075348 | 886 | |
252b5132 RH |
887 | switch (ELF32_R_TYPE (rel->r_info)) |
888 | { | |
889 | case R_68K_GOT8: | |
890 | case R_68K_GOT16: | |
891 | case R_68K_GOT32: | |
892 | case R_68K_GOT8O: | |
893 | case R_68K_GOT16O: | |
894 | case R_68K_GOT32O: | |
3eb128b2 | 895 | if (h != NULL) |
252b5132 | 896 | { |
252b5132 RH |
897 | if (h->got.refcount > 0) |
898 | { | |
899 | --h->got.refcount; | |
900 | if (h->got.refcount == 0) | |
901 | { | |
902 | /* We don't need the .got entry any more. */ | |
eea6121a AM |
903 | sgot->size -= 4; |
904 | srelgot->size -= sizeof (Elf32_External_Rela); | |
252b5132 RH |
905 | } |
906 | } | |
907 | } | |
dd5724d5 | 908 | else if (local_got_refcounts != NULL) |
252b5132 RH |
909 | { |
910 | if (local_got_refcounts[r_symndx] > 0) | |
911 | { | |
912 | --local_got_refcounts[r_symndx]; | |
913 | if (local_got_refcounts[r_symndx] == 0) | |
914 | { | |
915 | /* We don't need the .got entry any more. */ | |
eea6121a | 916 | sgot->size -= 4; |
252b5132 | 917 | if (info->shared) |
eea6121a | 918 | srelgot->size -= sizeof (Elf32_External_Rela); |
252b5132 RH |
919 | } |
920 | } | |
921 | } | |
922 | break; | |
923 | ||
924 | case R_68K_PLT8: | |
925 | case R_68K_PLT16: | |
926 | case R_68K_PLT32: | |
927 | case R_68K_PLT8O: | |
928 | case R_68K_PLT16O: | |
929 | case R_68K_PLT32O: | |
930 | case R_68K_PC8: | |
931 | case R_68K_PC16: | |
932 | case R_68K_PC32: | |
933 | case R_68K_8: | |
934 | case R_68K_16: | |
935 | case R_68K_32: | |
3eb128b2 | 936 | if (h != NULL) |
252b5132 | 937 | { |
252b5132 RH |
938 | if (h->plt.refcount > 0) |
939 | --h->plt.refcount; | |
940 | } | |
941 | break; | |
942 | ||
943 | default: | |
944 | break; | |
945 | } | |
946 | } | |
947 | ||
b34976b6 | 948 | return TRUE; |
252b5132 RH |
949 | } |
950 | ||
252b5132 RH |
951 | /* Adjust a symbol defined by a dynamic object and referenced by a |
952 | regular object. The current definition is in some section of the | |
953 | dynamic object, but we're not including those sections. We have to | |
954 | change the definition to something the rest of the link can | |
955 | understand. */ | |
956 | ||
b34976b6 | 957 | static bfd_boolean |
252b5132 RH |
958 | elf_m68k_adjust_dynamic_symbol (info, h) |
959 | struct bfd_link_info *info; | |
960 | struct elf_link_hash_entry *h; | |
961 | { | |
962 | bfd *dynobj; | |
963 | asection *s; | |
964 | unsigned int power_of_two; | |
965 | ||
966 | dynobj = elf_hash_table (info)->dynobj; | |
967 | ||
968 | /* Make sure we know what is going on here. */ | |
969 | BFD_ASSERT (dynobj != NULL | |
f5385ebf | 970 | && (h->needs_plt |
f6e332e6 | 971 | || h->u.weakdef != NULL |
f5385ebf AM |
972 | || (h->def_dynamic |
973 | && h->ref_regular | |
974 | && !h->def_regular))); | |
252b5132 RH |
975 | |
976 | /* If this is a function, put it in the procedure linkage table. We | |
977 | will fill in the contents of the procedure linkage table later, | |
978 | when we know the address of the .got section. */ | |
979 | if (h->type == STT_FUNC | |
f5385ebf | 980 | || h->needs_plt) |
252b5132 | 981 | { |
9dfe8738 AS |
982 | if ((h->plt.refcount <= 0 |
983 | || SYMBOL_CALLS_LOCAL (info, h) | |
984 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
985 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
986 | /* We must always create the plt entry if it was referenced |
987 | by a PLTxxO relocation. In this case we already recorded | |
988 | it as a dynamic symbol. */ | |
989 | && h->dynindx == -1) | |
990 | { | |
991 | /* This case can occur if we saw a PLTxx reloc in an input | |
992 | file, but the symbol was never referred to by a dynamic | |
9dfe8738 AS |
993 | object, or if all references were garbage collected. In |
994 | such a case, we don't actually need to build a procedure | |
995 | linkage table, and we can just do a PCxx reloc instead. */ | |
252b5132 | 996 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 997 | h->needs_plt = 0; |
b34976b6 | 998 | return TRUE; |
252b5132 RH |
999 | } |
1000 | ||
1001 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 | 1002 | if (h->dynindx == -1 |
f5385ebf | 1003 | && !h->forced_local) |
252b5132 | 1004 | { |
c152c796 | 1005 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1006 | return FALSE; |
252b5132 RH |
1007 | } |
1008 | ||
1009 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
1010 | BFD_ASSERT (s != NULL); | |
1011 | ||
1012 | /* If this is the first .plt entry, make room for the special | |
1013 | first entry. */ | |
eea6121a | 1014 | if (s->size == 0) |
70f06c4a AS |
1015 | { |
1016 | if (CPU32_FLAG (dynobj)) | |
eea6121a | 1017 | s->size += PLT_CPU32_ENTRY_SIZE; |
238d258f NC |
1018 | else if (CFV4E_FLAG (dynobj)) |
1019 | s->size += CFV4E_PLT_ENTRY_SIZE; | |
70f06c4a | 1020 | else |
eea6121a | 1021 | s->size += PLT_ENTRY_SIZE; |
70f06c4a | 1022 | } |
252b5132 RH |
1023 | |
1024 | /* If this symbol is not defined in a regular file, and we are | |
1025 | not generating a shared library, then set the symbol to this | |
1026 | location in the .plt. This is required to make function | |
1027 | pointers compare as equal between the normal executable and | |
1028 | the shared library. */ | |
1029 | if (!info->shared | |
f5385ebf | 1030 | && !h->def_regular) |
252b5132 RH |
1031 | { |
1032 | h->root.u.def.section = s; | |
eea6121a | 1033 | h->root.u.def.value = s->size; |
252b5132 RH |
1034 | } |
1035 | ||
eea6121a | 1036 | h->plt.offset = s->size; |
252b5132 RH |
1037 | |
1038 | /* Make room for this entry. */ | |
9e1281c7 | 1039 | if (CPU32_FLAG (dynobj)) |
eea6121a | 1040 | s->size += PLT_CPU32_ENTRY_SIZE; |
238d258f NC |
1041 | else if (CFV4E_FLAG (dynobj)) |
1042 | s->size += CFV4E_PLT_ENTRY_SIZE; | |
9e1281c7 | 1043 | else |
eea6121a | 1044 | s->size += PLT_ENTRY_SIZE; |
252b5132 RH |
1045 | |
1046 | /* We also need to make an entry in the .got.plt section, which | |
1047 | will be placed in the .got section by the linker script. */ | |
252b5132 RH |
1048 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
1049 | BFD_ASSERT (s != NULL); | |
eea6121a | 1050 | s->size += 4; |
252b5132 RH |
1051 | |
1052 | /* We also need to make an entry in the .rela.plt section. */ | |
252b5132 RH |
1053 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
1054 | BFD_ASSERT (s != NULL); | |
eea6121a | 1055 | s->size += sizeof (Elf32_External_Rela); |
252b5132 | 1056 | |
b34976b6 | 1057 | return TRUE; |
252b5132 RH |
1058 | } |
1059 | ||
1060 | /* Reinitialize the plt offset now that it is not used as a reference | |
1061 | count any more. */ | |
1062 | h->plt.offset = (bfd_vma) -1; | |
1063 | ||
1064 | /* If this is a weak symbol, and there is a real definition, the | |
1065 | processor independent code will have arranged for us to see the | |
1066 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 1067 | if (h->u.weakdef != NULL) |
252b5132 | 1068 | { |
f6e332e6 AM |
1069 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1070 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1071 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1072 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
b34976b6 | 1073 | return TRUE; |
252b5132 RH |
1074 | } |
1075 | ||
1076 | /* This is a reference to a symbol defined by a dynamic object which | |
1077 | is not a function. */ | |
1078 | ||
1079 | /* If we are creating a shared library, we must presume that the | |
1080 | only references to the symbol are via the global offset table. | |
1081 | For such cases we need not do anything here; the relocations will | |
1082 | be handled correctly by relocate_section. */ | |
1083 | if (info->shared) | |
b34976b6 | 1084 | return TRUE; |
252b5132 | 1085 | |
909272ee AM |
1086 | if (h->size == 0) |
1087 | { | |
1088 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1089 | h->root.root.string); | |
1090 | return TRUE; | |
1091 | } | |
1092 | ||
252b5132 RH |
1093 | /* We must allocate the symbol in our .dynbss section, which will |
1094 | become part of the .bss section of the executable. There will be | |
1095 | an entry for this symbol in the .dynsym section. The dynamic | |
1096 | object will contain position independent code, so all references | |
1097 | from the dynamic object to this symbol will go through the global | |
1098 | offset table. The dynamic linker will use the .dynsym entry to | |
1099 | determine the address it must put in the global offset table, so | |
1100 | both the dynamic object and the regular object will refer to the | |
1101 | same memory location for the variable. */ | |
1102 | ||
1103 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1104 | BFD_ASSERT (s != NULL); | |
1105 | ||
1106 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
1107 | copy the initial value out of the dynamic object and into the | |
1108 | runtime process image. We need to remember the offset into the | |
1109 | .rela.bss section we are going to use. */ | |
1110 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1111 | { | |
1112 | asection *srel; | |
1113 | ||
1114 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
1115 | BFD_ASSERT (srel != NULL); | |
eea6121a | 1116 | srel->size += sizeof (Elf32_External_Rela); |
f5385ebf | 1117 | h->needs_copy = 1; |
252b5132 RH |
1118 | } |
1119 | ||
1120 | /* We need to figure out the alignment required for this symbol. I | |
1121 | have no idea how ELF linkers handle this. */ | |
1122 | power_of_two = bfd_log2 (h->size); | |
1123 | if (power_of_two > 3) | |
1124 | power_of_two = 3; | |
1125 | ||
1126 | /* Apply the required alignment. */ | |
eea6121a | 1127 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
252b5132 RH |
1128 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
1129 | { | |
1130 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
b34976b6 | 1131 | return FALSE; |
252b5132 RH |
1132 | } |
1133 | ||
1134 | /* Define the symbol as being at this point in the section. */ | |
1135 | h->root.u.def.section = s; | |
eea6121a | 1136 | h->root.u.def.value = s->size; |
252b5132 RH |
1137 | |
1138 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1139 | s->size += h->size; |
252b5132 | 1140 | |
b34976b6 | 1141 | return TRUE; |
252b5132 RH |
1142 | } |
1143 | ||
1144 | /* Set the sizes of the dynamic sections. */ | |
1145 | ||
b34976b6 | 1146 | static bfd_boolean |
252b5132 | 1147 | elf_m68k_size_dynamic_sections (output_bfd, info) |
aa91b392 | 1148 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1149 | struct bfd_link_info *info; |
1150 | { | |
1151 | bfd *dynobj; | |
1152 | asection *s; | |
b34976b6 AM |
1153 | bfd_boolean plt; |
1154 | bfd_boolean relocs; | |
252b5132 RH |
1155 | |
1156 | dynobj = elf_hash_table (info)->dynobj; | |
1157 | BFD_ASSERT (dynobj != NULL); | |
1158 | ||
1159 | if (elf_hash_table (info)->dynamic_sections_created) | |
1160 | { | |
1161 | /* Set the contents of the .interp section to the interpreter. */ | |
893c4fe2 | 1162 | if (info->executable) |
252b5132 RH |
1163 | { |
1164 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1165 | BFD_ASSERT (s != NULL); | |
eea6121a | 1166 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
1167 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1168 | } | |
1169 | } | |
1170 | else | |
1171 | { | |
1172 | /* We may have created entries in the .rela.got section. | |
1173 | However, if we are not creating the dynamic sections, we will | |
1174 | not actually use these entries. Reset the size of .rela.got, | |
1175 | which will cause it to get stripped from the output file | |
1176 | below. */ | |
1177 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1178 | if (s != NULL) | |
eea6121a | 1179 | s->size = 0; |
252b5132 RH |
1180 | } |
1181 | ||
b6152c34 AS |
1182 | /* If this is a -Bsymbolic shared link, then we need to discard all |
1183 | PC relative relocs against symbols defined in a regular object. | |
1184 | For the normal shared case we discard the PC relative relocs | |
1185 | against symbols that have become local due to visibility changes. | |
1186 | We allocated space for them in the check_relocs routine, but we | |
1187 | will not fill them in in the relocate_section routine. */ | |
1188 | if (info->shared) | |
0cca5f05 AS |
1189 | elf_link_hash_traverse (elf_hash_table (info), |
1190 | elf_m68k_discard_copies, | |
1191 | (PTR) info); | |
252b5132 RH |
1192 | |
1193 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1194 | determined the sizes of the various dynamic sections. Allocate | |
1195 | memory for them. */ | |
b34976b6 AM |
1196 | plt = FALSE; |
1197 | relocs = FALSE; | |
252b5132 RH |
1198 | for (s = dynobj->sections; s != NULL; s = s->next) |
1199 | { | |
1200 | const char *name; | |
252b5132 RH |
1201 | |
1202 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1203 | continue; | |
1204 | ||
1205 | /* It's OK to base decisions on the section name, because none | |
1206 | of the dynobj section names depend upon the input files. */ | |
1207 | name = bfd_get_section_name (dynobj, s); | |
1208 | ||
252b5132 RH |
1209 | if (strcmp (name, ".plt") == 0) |
1210 | { | |
c456f082 AM |
1211 | /* Remember whether there is a PLT. */ |
1212 | plt = s->size != 0; | |
252b5132 RH |
1213 | } |
1214 | else if (strncmp (name, ".rela", 5) == 0) | |
1215 | { | |
c456f082 | 1216 | if (s->size != 0) |
252b5132 | 1217 | { |
b34976b6 | 1218 | relocs = TRUE; |
252b5132 RH |
1219 | |
1220 | /* We use the reloc_count field as a counter if we need | |
1221 | to copy relocs into the output file. */ | |
1222 | s->reloc_count = 0; | |
1223 | } | |
1224 | } | |
c456f082 AM |
1225 | else if (strncmp (name, ".got", 4) != 0 |
1226 | && strcmp (name, ".dynbss") != 0) | |
252b5132 RH |
1227 | { |
1228 | /* It's not one of our sections, so don't allocate space. */ | |
1229 | continue; | |
1230 | } | |
1231 | ||
c456f082 | 1232 | if (s->size == 0) |
252b5132 | 1233 | { |
c456f082 AM |
1234 | /* If we don't need this section, strip it from the |
1235 | output file. This is mostly to handle .rela.bss and | |
1236 | .rela.plt. We must create both sections in | |
1237 | create_dynamic_sections, because they must be created | |
1238 | before the linker maps input sections to output | |
1239 | sections. The linker does that before | |
1240 | adjust_dynamic_symbol is called, and it is that | |
1241 | function which decides whether anything needs to go | |
1242 | into these sections. */ | |
8423293d | 1243 | s->flags |= SEC_EXCLUDE; |
252b5132 RH |
1244 | continue; |
1245 | } | |
1246 | ||
c456f082 AM |
1247 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
1248 | continue; | |
1249 | ||
252b5132 | 1250 | /* Allocate memory for the section contents. */ |
7a9af8c4 NC |
1251 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
1252 | Unused entries should be reclaimed before the section's contents | |
1253 | are written out, but at the moment this does not happen. Thus in | |
1254 | order to prevent writing out garbage, we initialise the section's | |
1255 | contents to zero. */ | |
eea6121a | 1256 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 1257 | if (s->contents == NULL) |
b34976b6 | 1258 | return FALSE; |
252b5132 RH |
1259 | } |
1260 | ||
1261 | if (elf_hash_table (info)->dynamic_sections_created) | |
1262 | { | |
1263 | /* Add some entries to the .dynamic section. We fill in the | |
1264 | values later, in elf_m68k_finish_dynamic_sections, but we | |
1265 | must add the entries now so that we get the correct size for | |
1266 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1267 | dynamic linker and used by the debugger. */ | |
dc810e39 | 1268 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 1269 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 1270 | |
252b5132 RH |
1271 | if (!info->shared) |
1272 | { | |
dc810e39 | 1273 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1274 | return FALSE; |
252b5132 RH |
1275 | } |
1276 | ||
1277 | if (plt) | |
1278 | { | |
dc810e39 AM |
1279 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1280 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1281 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1282 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1283 | return FALSE; |
252b5132 RH |
1284 | } |
1285 | ||
1286 | if (relocs) | |
1287 | { | |
dc810e39 AM |
1288 | if (!add_dynamic_entry (DT_RELA, 0) |
1289 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1290 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 1291 | return FALSE; |
252b5132 RH |
1292 | } |
1293 | ||
aa91b392 | 1294 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 1295 | { |
dc810e39 | 1296 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 1297 | return FALSE; |
252b5132 RH |
1298 | } |
1299 | } | |
dc810e39 | 1300 | #undef add_dynamic_entry |
252b5132 | 1301 | |
b34976b6 | 1302 | return TRUE; |
252b5132 RH |
1303 | } |
1304 | ||
0cca5f05 | 1305 | /* This function is called via elf_link_hash_traverse if we are |
b6152c34 AS |
1306 | creating a shared object. In the -Bsymbolic case it discards the |
1307 | space allocated to copy PC relative relocs against symbols which | |
3e829b4a | 1308 | are defined in regular objects. For the normal shared case, it |
b6152c34 AS |
1309 | discards space for pc-relative relocs that have become local due to |
1310 | symbol visibility changes. We allocated space for them in the | |
1311 | check_relocs routine, but we won't fill them in in the | |
3e829b4a AS |
1312 | relocate_section routine. |
1313 | ||
1314 | We also check whether any of the remaining relocations apply | |
1315 | against a readonly section, and set the DF_TEXTREL flag in this | |
1316 | case. */ | |
252b5132 | 1317 | |
b34976b6 | 1318 | static bfd_boolean |
b6152c34 | 1319 | elf_m68k_discard_copies (h, inf) |
0cca5f05 | 1320 | struct elf_link_hash_entry *h; |
b6152c34 | 1321 | PTR inf; |
252b5132 | 1322 | { |
b6152c34 | 1323 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
252b5132 RH |
1324 | struct elf_m68k_pcrel_relocs_copied *s; |
1325 | ||
0cca5f05 AS |
1326 | if (h->root.type == bfd_link_hash_warning) |
1327 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
e92d460e | 1328 | |
f5385ebf | 1329 | if (!h->def_regular |
b6152c34 | 1330 | || (!info->symbolic |
f5385ebf | 1331 | && !h->forced_local)) |
3e829b4a AS |
1332 | { |
1333 | if ((info->flags & DF_TEXTREL) == 0) | |
1334 | { | |
1335 | /* Look for relocations against read-only sections. */ | |
0cca5f05 AS |
1336 | for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; |
1337 | s != NULL; | |
1338 | s = s->next) | |
3e829b4a AS |
1339 | if ((s->section->flags & SEC_READONLY) != 0) |
1340 | { | |
1341 | info->flags |= DF_TEXTREL; | |
1342 | break; | |
1343 | } | |
1344 | } | |
0cca5f05 | 1345 | |
3e829b4a AS |
1346 | return TRUE; |
1347 | } | |
252b5132 | 1348 | |
0cca5f05 AS |
1349 | for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; |
1350 | s != NULL; | |
1351 | s = s->next) | |
eea6121a | 1352 | s->section->size -= s->count * sizeof (Elf32_External_Rela); |
252b5132 | 1353 | |
b34976b6 | 1354 | return TRUE; |
252b5132 RH |
1355 | } |
1356 | ||
1357 | /* Relocate an M68K ELF section. */ | |
1358 | ||
b34976b6 | 1359 | static bfd_boolean |
252b5132 RH |
1360 | elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section, |
1361 | contents, relocs, local_syms, local_sections) | |
1362 | bfd *output_bfd; | |
1363 | struct bfd_link_info *info; | |
1364 | bfd *input_bfd; | |
1365 | asection *input_section; | |
1366 | bfd_byte *contents; | |
1367 | Elf_Internal_Rela *relocs; | |
1368 | Elf_Internal_Sym *local_syms; | |
1369 | asection **local_sections; | |
1370 | { | |
1371 | bfd *dynobj; | |
1372 | Elf_Internal_Shdr *symtab_hdr; | |
1373 | struct elf_link_hash_entry **sym_hashes; | |
1374 | bfd_vma *local_got_offsets; | |
1375 | asection *sgot; | |
1376 | asection *splt; | |
1377 | asection *sreloc; | |
1378 | Elf_Internal_Rela *rel; | |
1379 | Elf_Internal_Rela *relend; | |
1380 | ||
1049f94e | 1381 | if (info->relocatable) |
b34976b6 | 1382 | return TRUE; |
b491616a | 1383 | |
252b5132 RH |
1384 | dynobj = elf_hash_table (info)->dynobj; |
1385 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1386 | sym_hashes = elf_sym_hashes (input_bfd); | |
1387 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1388 | ||
1389 | sgot = NULL; | |
1390 | splt = NULL; | |
1391 | sreloc = NULL; | |
1392 | ||
1393 | rel = relocs; | |
1394 | relend = relocs + input_section->reloc_count; | |
1395 | for (; rel < relend; rel++) | |
1396 | { | |
1397 | int r_type; | |
1398 | reloc_howto_type *howto; | |
1399 | unsigned long r_symndx; | |
1400 | struct elf_link_hash_entry *h; | |
1401 | Elf_Internal_Sym *sym; | |
1402 | asection *sec; | |
1403 | bfd_vma relocation; | |
44f745a6 | 1404 | bfd_boolean unresolved_reloc; |
252b5132 RH |
1405 | bfd_reloc_status_type r; |
1406 | ||
1407 | r_type = ELF32_R_TYPE (rel->r_info); | |
1408 | if (r_type < 0 || r_type >= (int) R_68K_max) | |
1409 | { | |
1410 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1411 | return FALSE; |
252b5132 RH |
1412 | } |
1413 | howto = howto_table + r_type; | |
1414 | ||
1415 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1416 | ||
252b5132 RH |
1417 | h = NULL; |
1418 | sym = NULL; | |
1419 | sec = NULL; | |
44f745a6 | 1420 | unresolved_reloc = FALSE; |
560e09e9 | 1421 | |
252b5132 RH |
1422 | if (r_symndx < symtab_hdr->sh_info) |
1423 | { | |
1424 | sym = local_syms + r_symndx; | |
1425 | sec = local_sections[r_symndx]; | |
8517fae7 | 1426 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
252b5132 RH |
1427 | } |
1428 | else | |
1429 | { | |
560e09e9 NC |
1430 | bfd_boolean warned; |
1431 | ||
b2a8e766 AM |
1432 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1433 | r_symndx, symtab_hdr, sym_hashes, | |
1434 | h, sec, relocation, | |
1435 | unresolved_reloc, warned); | |
252b5132 RH |
1436 | } |
1437 | ||
1438 | switch (r_type) | |
1439 | { | |
1440 | case R_68K_GOT8: | |
1441 | case R_68K_GOT16: | |
1442 | case R_68K_GOT32: | |
1443 | /* Relocation is to the address of the entry for this symbol | |
1444 | in the global offset table. */ | |
1445 | if (h != NULL | |
1446 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1447 | break; | |
1448 | /* Fall through. */ | |
1449 | case R_68K_GOT8O: | |
1450 | case R_68K_GOT16O: | |
1451 | case R_68K_GOT32O: | |
1452 | /* Relocation is the offset of the entry for this symbol in | |
1453 | the global offset table. */ | |
1454 | ||
1455 | { | |
1456 | bfd_vma off; | |
1457 | ||
1458 | if (sgot == NULL) | |
1459 | { | |
1460 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1461 | BFD_ASSERT (sgot != NULL); | |
1462 | } | |
1463 | ||
1464 | if (h != NULL) | |
1465 | { | |
a5ad465a AS |
1466 | bfd_boolean dyn; |
1467 | ||
252b5132 RH |
1468 | off = h->got.offset; |
1469 | BFD_ASSERT (off != (bfd_vma) -1); | |
1470 | ||
a5ad465a AS |
1471 | dyn = elf_hash_table (info)->dynamic_sections_created; |
1472 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
252b5132 | 1473 | || (info->shared |
a5ad465a AS |
1474 | && (info->symbolic |
1475 | || h->dynindx == -1 | |
f5385ebf AM |
1476 | || h->forced_local) |
1477 | && h->def_regular)) | |
252b5132 RH |
1478 | { |
1479 | /* This is actually a static link, or it is a | |
1480 | -Bsymbolic link and the symbol is defined | |
1481 | locally, or the symbol was forced to be local | |
1482 | because of a version file.. We must initialize | |
1483 | this entry in the global offset table. Since | |
1484 | the offset must always be a multiple of 4, we | |
1485 | use the least significant bit to record whether | |
1486 | we have initialized it already. | |
1487 | ||
1488 | When doing a dynamic link, we create a .rela.got | |
1489 | relocation entry to initialize the value. This | |
1490 | is done in the finish_dynamic_symbol routine. */ | |
1491 | if ((off & 1) != 0) | |
1492 | off &= ~1; | |
1493 | else | |
1494 | { | |
1495 | bfd_put_32 (output_bfd, relocation, | |
1496 | sgot->contents + off); | |
1497 | h->got.offset |= 1; | |
1498 | } | |
1499 | } | |
44f745a6 AS |
1500 | else |
1501 | unresolved_reloc = FALSE; | |
252b5132 RH |
1502 | } |
1503 | else | |
1504 | { | |
1505 | BFD_ASSERT (local_got_offsets != NULL | |
1506 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1507 | ||
1508 | off = local_got_offsets[r_symndx]; | |
1509 | ||
1510 | /* The offset must always be a multiple of 4. We use | |
1511 | the least significant bit to record whether we have | |
1512 | already generated the necessary reloc. */ | |
1513 | if ((off & 1) != 0) | |
1514 | off &= ~1; | |
1515 | else | |
1516 | { | |
1517 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1518 | ||
1519 | if (info->shared) | |
1520 | { | |
947216bf | 1521 | asection *s; |
252b5132 | 1522 | Elf_Internal_Rela outrel; |
947216bf | 1523 | bfd_byte *loc; |
252b5132 | 1524 | |
947216bf AM |
1525 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
1526 | BFD_ASSERT (s != NULL); | |
252b5132 RH |
1527 | |
1528 | outrel.r_offset = (sgot->output_section->vma | |
1529 | + sgot->output_offset | |
1530 | + off); | |
1531 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1532 | outrel.r_addend = relocation; | |
947216bf AM |
1533 | loc = s->contents; |
1534 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1535 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1536 | } |
1537 | ||
1538 | local_got_offsets[r_symndx] |= 1; | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | relocation = sgot->output_offset + off; | |
1543 | if (r_type == R_68K_GOT8O | |
1544 | || r_type == R_68K_GOT16O | |
1545 | || r_type == R_68K_GOT32O) | |
1546 | { | |
1547 | /* This relocation does not use the addend. */ | |
1548 | rel->r_addend = 0; | |
1549 | } | |
1550 | else | |
1551 | relocation += sgot->output_section->vma; | |
1552 | } | |
1553 | break; | |
1554 | ||
1555 | case R_68K_PLT8: | |
1556 | case R_68K_PLT16: | |
1557 | case R_68K_PLT32: | |
1558 | /* Relocation is to the entry for this symbol in the | |
1559 | procedure linkage table. */ | |
1560 | ||
1561 | /* Resolve a PLTxx reloc against a local symbol directly, | |
1562 | without using the procedure linkage table. */ | |
1563 | if (h == NULL) | |
1564 | break; | |
1565 | ||
1566 | if (h->plt.offset == (bfd_vma) -1 | |
1567 | || !elf_hash_table (info)->dynamic_sections_created) | |
1568 | { | |
1569 | /* We didn't make a PLT entry for this symbol. This | |
1570 | happens when statically linking PIC code, or when | |
1571 | using -Bsymbolic. */ | |
1572 | break; | |
1573 | } | |
1574 | ||
1575 | if (splt == NULL) | |
1576 | { | |
1577 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1578 | BFD_ASSERT (splt != NULL); | |
1579 | } | |
1580 | ||
1581 | relocation = (splt->output_section->vma | |
1582 | + splt->output_offset | |
1583 | + h->plt.offset); | |
44f745a6 | 1584 | unresolved_reloc = FALSE; |
252b5132 RH |
1585 | break; |
1586 | ||
1587 | case R_68K_PLT8O: | |
1588 | case R_68K_PLT16O: | |
1589 | case R_68K_PLT32O: | |
1590 | /* Relocation is the offset of the entry for this symbol in | |
1591 | the procedure linkage table. */ | |
1592 | BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1); | |
1593 | ||
1594 | if (splt == NULL) | |
1595 | { | |
1596 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1597 | BFD_ASSERT (splt != NULL); | |
1598 | } | |
1599 | ||
1600 | relocation = h->plt.offset; | |
44f745a6 | 1601 | unresolved_reloc = FALSE; |
252b5132 RH |
1602 | |
1603 | /* This relocation does not use the addend. */ | |
1604 | rel->r_addend = 0; | |
1605 | ||
1606 | break; | |
1607 | ||
1608 | case R_68K_PC8: | |
1609 | case R_68K_PC16: | |
1610 | case R_68K_PC32: | |
b6152c34 AS |
1611 | if (h == NULL |
1612 | || (info->shared | |
f5385ebf | 1613 | && h->forced_local)) |
252b5132 RH |
1614 | break; |
1615 | /* Fall through. */ | |
1616 | case R_68K_8: | |
1617 | case R_68K_16: | |
1618 | case R_68K_32: | |
1619 | if (info->shared | |
ec338859 | 1620 | && r_symndx != 0 |
252b5132 | 1621 | && (input_section->flags & SEC_ALLOC) != 0 |
d2ff124f AS |
1622 | && (h == NULL |
1623 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1624 | || h->root.type != bfd_link_hash_undefweak) | |
252b5132 RH |
1625 | && ((r_type != R_68K_PC8 |
1626 | && r_type != R_68K_PC16 | |
1627 | && r_type != R_68K_PC32) | |
d2ff124f AS |
1628 | || (h != NULL |
1629 | && h->dynindx != -1 | |
1630 | && (!info->symbolic | |
f5385ebf | 1631 | || !h->def_regular)))) |
252b5132 RH |
1632 | { |
1633 | Elf_Internal_Rela outrel; | |
947216bf | 1634 | bfd_byte *loc; |
b34976b6 | 1635 | bfd_boolean skip, relocate; |
252b5132 RH |
1636 | |
1637 | /* When generating a shared object, these relocations | |
1638 | are copied into the output file to be resolved at run | |
1639 | time. */ | |
1640 | ||
b34976b6 AM |
1641 | skip = FALSE; |
1642 | relocate = FALSE; | |
252b5132 | 1643 | |
c629eae0 JJ |
1644 | outrel.r_offset = |
1645 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1646 | rel->r_offset); | |
1647 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 1648 | skip = TRUE; |
0bb2d96a | 1649 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 1650 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
1651 | outrel.r_offset += (input_section->output_section->vma |
1652 | + input_section->output_offset); | |
1653 | ||
1654 | if (skip) | |
0bb2d96a | 1655 | memset (&outrel, 0, sizeof outrel); |
252b5132 | 1656 | else if (h != NULL |
d2ff124f AS |
1657 | && h->dynindx != -1 |
1658 | && (r_type == R_68K_PC8 | |
1659 | || r_type == R_68K_PC16 | |
1660 | || r_type == R_68K_PC32 | |
1661 | || !info->shared | |
1662 | || !info->symbolic | |
f5385ebf | 1663 | || !h->def_regular)) |
252b5132 | 1664 | { |
252b5132 | 1665 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
d2ff124f | 1666 | outrel.r_addend = rel->r_addend; |
252b5132 RH |
1667 | } |
1668 | else | |
1669 | { | |
d2ff124f | 1670 | /* This symbol is local, or marked to become local. */ |
252b5132 RH |
1671 | if (r_type == R_68K_32) |
1672 | { | |
b34976b6 | 1673 | relocate = TRUE; |
252b5132 RH |
1674 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); |
1675 | outrel.r_addend = relocation + rel->r_addend; | |
1676 | } | |
1677 | else | |
1678 | { | |
1679 | long indx; | |
1680 | ||
8517fae7 | 1681 | if (bfd_is_abs_section (sec)) |
252b5132 RH |
1682 | indx = 0; |
1683 | else if (sec == NULL || sec->owner == NULL) | |
1684 | { | |
1685 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1686 | return FALSE; |
252b5132 RH |
1687 | } |
1688 | else | |
1689 | { | |
1690 | asection *osec; | |
1691 | ||
1692 | osec = sec->output_section; | |
1693 | indx = elf_section_data (osec)->dynindx; | |
1694 | BFD_ASSERT (indx > 0); | |
1695 | } | |
1696 | ||
252b5132 RH |
1697 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
1698 | outrel.r_addend = relocation + rel->r_addend; | |
1699 | } | |
1700 | } | |
1701 | ||
d2ff124f AS |
1702 | sreloc = elf_section_data (input_section)->sreloc; |
1703 | if (sreloc == NULL) | |
1704 | abort (); | |
1705 | ||
947216bf AM |
1706 | loc = sreloc->contents; |
1707 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
1708 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1709 | |
1710 | /* This reloc will be computed at runtime, so there's no | |
1711 | need to do anything now, except for R_68K_32 | |
1712 | relocations that have been turned into | |
1713 | R_68K_RELATIVE. */ | |
1714 | if (!relocate) | |
1715 | continue; | |
1716 | } | |
1717 | ||
1718 | break; | |
1719 | ||
1720 | case R_68K_GNU_VTINHERIT: | |
1721 | case R_68K_GNU_VTENTRY: | |
1722 | /* These are no-ops in the end. */ | |
1723 | continue; | |
1724 | ||
1725 | default: | |
1726 | break; | |
1727 | } | |
1728 | ||
44f745a6 AS |
1729 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
1730 | because such sections are not SEC_ALLOC and thus ld.so will | |
1731 | not process them. */ | |
1732 | if (unresolved_reloc | |
1733 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 1734 | && h->def_dynamic)) |
44f745a6 AS |
1735 | { |
1736 | (*_bfd_error_handler) | |
843fe662 | 1737 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
1738 | input_bfd, |
1739 | input_section, | |
44f745a6 | 1740 | (long) rel->r_offset, |
843fe662 | 1741 | howto->name, |
44f745a6 AS |
1742 | h->root.root.string); |
1743 | return FALSE; | |
1744 | } | |
1745 | ||
252b5132 RH |
1746 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
1747 | contents, rel->r_offset, | |
1748 | relocation, rel->r_addend); | |
1749 | ||
1750 | if (r != bfd_reloc_ok) | |
1751 | { | |
44f745a6 AS |
1752 | const char *name; |
1753 | ||
1754 | if (h != NULL) | |
1755 | name = h->root.root.string; | |
1756 | else | |
252b5132 | 1757 | { |
44f745a6 AS |
1758 | name = bfd_elf_string_from_elf_section (input_bfd, |
1759 | symtab_hdr->sh_link, | |
1760 | sym->st_name); | |
1761 | if (name == NULL) | |
1762 | return FALSE; | |
1763 | if (*name == '\0') | |
1764 | name = bfd_section_name (input_bfd, sec); | |
1765 | } | |
252b5132 | 1766 | |
44f745a6 AS |
1767 | if (r == bfd_reloc_overflow) |
1768 | { | |
1769 | if (!(info->callbacks->reloc_overflow | |
dfeffb9f L |
1770 | (info, (h ? &h->root : NULL), name, howto->name, |
1771 | (bfd_vma) 0, input_bfd, input_section, | |
1772 | rel->r_offset))) | |
44f745a6 AS |
1773 | return FALSE; |
1774 | } | |
1775 | else | |
1776 | { | |
1777 | (*_bfd_error_handler) | |
d003868e AM |
1778 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
1779 | input_bfd, input_section, | |
44f745a6 AS |
1780 | (long) rel->r_offset, name, (int) r); |
1781 | return FALSE; | |
252b5132 RH |
1782 | } |
1783 | } | |
1784 | } | |
1785 | ||
b34976b6 | 1786 | return TRUE; |
252b5132 RH |
1787 | } |
1788 | ||
1789 | /* Finish up dynamic symbol handling. We set the contents of various | |
1790 | dynamic sections here. */ | |
1791 | ||
b34976b6 | 1792 | static bfd_boolean |
252b5132 RH |
1793 | elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym) |
1794 | bfd *output_bfd; | |
1795 | struct bfd_link_info *info; | |
1796 | struct elf_link_hash_entry *h; | |
1797 | Elf_Internal_Sym *sym; | |
1798 | { | |
1799 | bfd *dynobj; | |
9e1281c7 | 1800 | int plt_off1, plt_off2, plt_off3; |
252b5132 RH |
1801 | |
1802 | dynobj = elf_hash_table (info)->dynobj; | |
1803 | ||
1804 | if (h->plt.offset != (bfd_vma) -1) | |
1805 | { | |
1806 | asection *splt; | |
1807 | asection *sgot; | |
1808 | asection *srela; | |
1809 | bfd_vma plt_index; | |
1810 | bfd_vma got_offset; | |
1811 | Elf_Internal_Rela rela; | |
947216bf | 1812 | bfd_byte *loc; |
252b5132 RH |
1813 | |
1814 | /* This symbol has an entry in the procedure linkage table. Set | |
1815 | it up. */ | |
1816 | ||
1817 | BFD_ASSERT (h->dynindx != -1); | |
1818 | ||
1819 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1820 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1821 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1822 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
1823 | ||
1824 | /* Get the index in the procedure linkage table which | |
1825 | corresponds to this symbol. This is the index of this symbol | |
1826 | in all the symbols for which we are making plt entries. The | |
1827 | first entry in the procedure linkage table is reserved. */ | |
238d258f NC |
1828 | if (CPU32_FLAG (output_bfd)) |
1829 | plt_index = (h->plt.offset / PLT_CPU32_ENTRY_SIZE) - 1; | |
1830 | else if (CFV4E_FLAG (output_bfd)) | |
1831 | plt_index = (h->plt.offset / CFV4E_PLT_ENTRY_SIZE) - 1; | |
9e1281c7 | 1832 | else |
238d258f | 1833 | plt_index = (h->plt.offset / PLT_ENTRY_SIZE) - 1; |
252b5132 RH |
1834 | |
1835 | /* Get the offset into the .got table of the entry that | |
1836 | corresponds to this function. Each .got entry is 4 bytes. | |
1837 | The first three are reserved. */ | |
1838 | got_offset = (plt_index + 3) * 4; | |
1839 | ||
238d258f | 1840 | if (CPU32_FLAG (output_bfd)) |
9e1281c7 CM |
1841 | { |
1842 | /* Fill in the entry in the procedure linkage table. */ | |
1843 | memcpy (splt->contents + h->plt.offset, elf_cpu32_plt_entry, | |
1844 | PLT_CPU32_ENTRY_SIZE); | |
1845 | plt_off1 = 4; | |
1846 | plt_off2 = 12; | |
1847 | plt_off3 = 18; | |
1848 | } | |
238d258f NC |
1849 | else if (CFV4E_FLAG (output_bfd)) |
1850 | { | |
1851 | memcpy (splt->contents + h->plt.offset, elf_cfv4e_plt_entry, | |
1852 | CFV4E_PLT_ENTRY_SIZE); | |
1853 | plt_off1 = 2; | |
1854 | plt_off2 = 14; | |
1855 | plt_off3 = 20; | |
1856 | } | |
9e1281c7 CM |
1857 | else |
1858 | { | |
1859 | /* Fill in the entry in the procedure linkage table. */ | |
1860 | memcpy (splt->contents + h->plt.offset, elf_m68k_plt_entry, | |
1861 | PLT_ENTRY_SIZE); | |
1862 | plt_off1 = 4; | |
1863 | plt_off2 = 10; | |
1864 | plt_off3 = 16; | |
1865 | } | |
1866 | ||
252b5132 RH |
1867 | /* The offset is relative to the first extension word. */ |
1868 | bfd_put_32 (output_bfd, | |
238d258f NC |
1869 | sgot->output_section->vma |
1870 | + sgot->output_offset | |
1871 | + got_offset | |
1872 | - (splt->output_section->vma | |
1873 | + h->plt.offset | |
966972ec | 1874 | + (CFV4E_FLAG (output_bfd) ? 8 : 2)), |
9e1281c7 | 1875 | splt->contents + h->plt.offset + plt_off1); |
252b5132 RH |
1876 | |
1877 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
9e1281c7 CM |
1878 | splt->contents + h->plt.offset + plt_off2); |
1879 | bfd_put_32 (output_bfd, - (h->plt.offset + plt_off3), | |
1880 | splt->contents + h->plt.offset + plt_off3); | |
252b5132 RH |
1881 | |
1882 | /* Fill in the entry in the global offset table. */ | |
1883 | bfd_put_32 (output_bfd, | |
1884 | (splt->output_section->vma | |
1885 | + splt->output_offset | |
1886 | + h->plt.offset | |
966972ec | 1887 | + (CFV4E_FLAG (output_bfd) ? 12 : 8)), |
252b5132 RH |
1888 | sgot->contents + got_offset); |
1889 | ||
1890 | /* Fill in the entry in the .rela.plt section. */ | |
1891 | rela.r_offset = (sgot->output_section->vma | |
1892 | + sgot->output_offset | |
1893 | + got_offset); | |
1894 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); | |
1895 | rela.r_addend = 0; | |
947216bf AM |
1896 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
1897 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 | 1898 | |
f5385ebf | 1899 | if (!h->def_regular) |
252b5132 RH |
1900 | { |
1901 | /* Mark the symbol as undefined, rather than as defined in | |
1902 | the .plt section. Leave the value alone. */ | |
1903 | sym->st_shndx = SHN_UNDEF; | |
1904 | } | |
1905 | } | |
1906 | ||
1907 | if (h->got.offset != (bfd_vma) -1) | |
1908 | { | |
1909 | asection *sgot; | |
1910 | asection *srela; | |
1911 | Elf_Internal_Rela rela; | |
947216bf | 1912 | bfd_byte *loc; |
252b5132 RH |
1913 | |
1914 | /* This symbol has an entry in the global offset table. Set it | |
1915 | up. */ | |
1916 | ||
1917 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1918 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1919 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1920 | ||
1921 | rela.r_offset = (sgot->output_section->vma | |
1922 | + sgot->output_offset | |
dc810e39 | 1923 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
1924 | |
1925 | /* If this is a -Bsymbolic link, and the symbol is defined | |
1926 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
1927 | the symbol was forced to be local because of a version file. | |
1928 | The entry in the global offset table will already have been | |
1929 | initialized in the relocate_section function. */ | |
1930 | if (info->shared | |
a5ad465a AS |
1931 | && (info->symbolic |
1932 | || h->dynindx == -1 | |
f5385ebf AM |
1933 | || h->forced_local) |
1934 | && h->def_regular) | |
252b5132 RH |
1935 | { |
1936 | rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1937 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
1938 | (sgot->contents | |
dc810e39 | 1939 | + (h->got.offset &~ (bfd_vma) 1))); |
252b5132 RH |
1940 | } |
1941 | else | |
1942 | { | |
1943 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
dc810e39 | 1944 | sgot->contents + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
1945 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); |
1946 | rela.r_addend = 0; | |
1947 | } | |
1948 | ||
947216bf AM |
1949 | loc = srela->contents; |
1950 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
1951 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
1952 | } |
1953 | ||
f5385ebf | 1954 | if (h->needs_copy) |
252b5132 RH |
1955 | { |
1956 | asection *s; | |
1957 | Elf_Internal_Rela rela; | |
947216bf | 1958 | bfd_byte *loc; |
252b5132 RH |
1959 | |
1960 | /* This symbol needs a copy reloc. Set it up. */ | |
1961 | ||
1962 | BFD_ASSERT (h->dynindx != -1 | |
1963 | && (h->root.type == bfd_link_hash_defined | |
1964 | || h->root.type == bfd_link_hash_defweak)); | |
1965 | ||
1966 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1967 | ".rela.bss"); | |
1968 | BFD_ASSERT (s != NULL); | |
1969 | ||
1970 | rela.r_offset = (h->root.u.def.value | |
1971 | + h->root.u.def.section->output_section->vma | |
1972 | + h->root.u.def.section->output_offset); | |
1973 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY); | |
1974 | rela.r_addend = 0; | |
947216bf AM |
1975 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
1976 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
1977 | } |
1978 | ||
1979 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
1980 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1981 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1982 | sym->st_shndx = SHN_ABS; | |
1983 | ||
b34976b6 | 1984 | return TRUE; |
252b5132 RH |
1985 | } |
1986 | ||
1987 | /* Finish up the dynamic sections. */ | |
1988 | ||
b34976b6 | 1989 | static bfd_boolean |
252b5132 RH |
1990 | elf_m68k_finish_dynamic_sections (output_bfd, info) |
1991 | bfd *output_bfd; | |
1992 | struct bfd_link_info *info; | |
1993 | { | |
1994 | bfd *dynobj; | |
1995 | asection *sgot; | |
1996 | asection *sdyn; | |
1997 | ||
1998 | dynobj = elf_hash_table (info)->dynobj; | |
1999 | ||
2000 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2001 | BFD_ASSERT (sgot != NULL); | |
2002 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2003 | ||
2004 | if (elf_hash_table (info)->dynamic_sections_created) | |
2005 | { | |
2006 | asection *splt; | |
2007 | Elf32_External_Dyn *dyncon, *dynconend; | |
2008 | ||
2009 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2010 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
2011 | ||
2012 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 2013 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
2014 | for (; dyncon < dynconend; dyncon++) |
2015 | { | |
2016 | Elf_Internal_Dyn dyn; | |
2017 | const char *name; | |
2018 | asection *s; | |
2019 | ||
2020 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2021 | ||
2022 | switch (dyn.d_tag) | |
2023 | { | |
2024 | default: | |
2025 | break; | |
2026 | ||
2027 | case DT_PLTGOT: | |
2028 | name = ".got"; | |
2029 | goto get_vma; | |
2030 | case DT_JMPREL: | |
2031 | name = ".rela.plt"; | |
2032 | get_vma: | |
2033 | s = bfd_get_section_by_name (output_bfd, name); | |
2034 | BFD_ASSERT (s != NULL); | |
2035 | dyn.d_un.d_ptr = s->vma; | |
2036 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2037 | break; | |
2038 | ||
2039 | case DT_PLTRELSZ: | |
2040 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2041 | BFD_ASSERT (s != NULL); | |
eea6121a | 2042 | dyn.d_un.d_val = s->size; |
252b5132 RH |
2043 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
2044 | break; | |
2045 | ||
2046 | case DT_RELASZ: | |
2047 | /* The procedure linkage table relocs (DT_JMPREL) should | |
2048 | not be included in the overall relocs (DT_RELA). | |
2049 | Therefore, we override the DT_RELASZ entry here to | |
2050 | make it not include the JMPREL relocs. Since the | |
2051 | linker script arranges for .rela.plt to follow all | |
2052 | other relocation sections, we don't have to worry | |
2053 | about changing the DT_RELA entry. */ | |
2054 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2055 | if (s != NULL) | |
eea6121a | 2056 | dyn.d_un.d_val -= s->size; |
252b5132 RH |
2057 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
2058 | break; | |
2059 | } | |
2060 | } | |
2061 | ||
2062 | /* Fill in the first entry in the procedure linkage table. */ | |
eea6121a | 2063 | if (splt->size > 0) |
252b5132 | 2064 | { |
238d258f NC |
2065 | if (CFV4E_FLAG (output_bfd)) |
2066 | { | |
2067 | memcpy (splt->contents, elf_cfv4e_plt0_entry, CFV4E_PLT_ENTRY_SIZE); | |
2068 | bfd_put_32 (output_bfd, | |
2069 | (sgot->output_section->vma | |
2070 | + sgot->output_offset + 4 | |
2071 | - (splt->output_section->vma + 2)), | |
2072 | splt->contents + 2); | |
2073 | bfd_put_32 (output_bfd, | |
2074 | (sgot->output_section->vma | |
2075 | + sgot->output_offset + 8 | |
2076 | - (splt->output_section->vma + 10) - 8), | |
2077 | splt->contents + 12); | |
2078 | elf_section_data (splt->output_section)->this_hdr.sh_entsize | |
2079 | = CFV4E_PLT_ENTRY_SIZE; | |
2080 | } | |
2081 | else if (CPU32_FLAG (output_bfd)) | |
9e1281c7 | 2082 | { |
238d258f | 2083 | memcpy (splt->contents, elf_cpu32_plt0_entry, PLT_CPU32_ENTRY_SIZE); |
9e1281c7 CM |
2084 | bfd_put_32 (output_bfd, |
2085 | (sgot->output_section->vma | |
2086 | + sgot->output_offset + 4 | |
2087 | - (splt->output_section->vma + 2)), | |
2088 | splt->contents + 4); | |
2089 | bfd_put_32 (output_bfd, | |
2090 | (sgot->output_section->vma | |
2091 | + sgot->output_offset + 8 | |
2092 | - (splt->output_section->vma + 10)), | |
2093 | splt->contents + 12); | |
c3668558 | 2094 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
238d258f | 2095 | = PLT_CPU32_ENTRY_SIZE; |
9e1281c7 | 2096 | } |
238d258f | 2097 | else |
9e1281c7 | 2098 | { |
238d258f | 2099 | memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE); |
9e1281c7 CM |
2100 | bfd_put_32 (output_bfd, |
2101 | (sgot->output_section->vma | |
2102 | + sgot->output_offset + 4 | |
2103 | - (splt->output_section->vma + 2)), | |
2104 | splt->contents + 4); | |
2105 | bfd_put_32 (output_bfd, | |
2106 | (sgot->output_section->vma | |
2107 | + sgot->output_offset + 8 | |
2108 | - (splt->output_section->vma + 10)), | |
6091b433 | 2109 | splt->contents + 12); |
c3668558 | 2110 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
238d258f | 2111 | = PLT_ENTRY_SIZE; |
9e1281c7 | 2112 | } |
252b5132 | 2113 | } |
252b5132 RH |
2114 | } |
2115 | ||
2116 | /* Fill in the first three entries in the global offset table. */ | |
eea6121a | 2117 | if (sgot->size > 0) |
252b5132 RH |
2118 | { |
2119 | if (sdyn == NULL) | |
2120 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2121 | else | |
2122 | bfd_put_32 (output_bfd, | |
2123 | sdyn->output_section->vma + sdyn->output_offset, | |
2124 | sgot->contents); | |
2125 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
2126 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
2127 | } | |
2128 | ||
2129 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
2130 | ||
b34976b6 | 2131 | return TRUE; |
252b5132 RH |
2132 | } |
2133 | ||
0752970e NC |
2134 | /* Given a .data section and a .emreloc in-memory section, store |
2135 | relocation information into the .emreloc section which can be | |
2136 | used at runtime to relocate the section. This is called by the | |
2137 | linker when the --embedded-relocs switch is used. This is called | |
2138 | after the add_symbols entry point has been called for all the | |
2139 | objects, and before the final_link entry point is called. */ | |
2140 | ||
b34976b6 | 2141 | bfd_boolean |
0752970e NC |
2142 | bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) |
2143 | bfd *abfd; | |
2144 | struct bfd_link_info *info; | |
2145 | asection *datasec; | |
2146 | asection *relsec; | |
2147 | char **errmsg; | |
2148 | { | |
2149 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc AM |
2150 | Elf_Internal_Sym *isymbuf = NULL; |
2151 | Elf_Internal_Rela *internal_relocs = NULL; | |
0752970e NC |
2152 | Elf_Internal_Rela *irel, *irelend; |
2153 | bfd_byte *p; | |
dc810e39 | 2154 | bfd_size_type amt; |
0752970e | 2155 | |
1049f94e | 2156 | BFD_ASSERT (! info->relocatable); |
0752970e NC |
2157 | |
2158 | *errmsg = NULL; | |
2159 | ||
2160 | if (datasec->reloc_count == 0) | |
b34976b6 | 2161 | return TRUE; |
0752970e NC |
2162 | |
2163 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9ad5cbcf | 2164 | |
0752970e | 2165 | /* Get a copy of the native relocations. */ |
45d6a902 | 2166 | internal_relocs = (_bfd_elf_link_read_relocs |
0752970e NC |
2167 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
2168 | info->keep_memory)); | |
2169 | if (internal_relocs == NULL) | |
2170 | goto error_return; | |
0752970e | 2171 | |
dc810e39 AM |
2172 | amt = (bfd_size_type) datasec->reloc_count * 12; |
2173 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); | |
0752970e NC |
2174 | if (relsec->contents == NULL) |
2175 | goto error_return; | |
2176 | ||
2177 | p = relsec->contents; | |
2178 | ||
2179 | irelend = internal_relocs + datasec->reloc_count; | |
2180 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
2181 | { | |
2182 | asection *targetsec; | |
2183 | ||
2184 | /* We are going to write a four byte longword into the runtime | |
2185 | reloc section. The longword will be the address in the data | |
2186 | section which must be relocated. It is followed by the name | |
2187 | of the target section NUL-padded or truncated to 8 | |
2188 | characters. */ | |
2189 | ||
2190 | /* We can only relocate absolute longword relocs at run time. */ | |
2191 | if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32) | |
2192 | { | |
2193 | *errmsg = _("unsupported reloc type"); | |
2194 | bfd_set_error (bfd_error_bad_value); | |
2195 | goto error_return; | |
2196 | } | |
2197 | ||
2198 | /* Get the target section referred to by the reloc. */ | |
2199 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2200 | { | |
0752970e | 2201 | /* A local symbol. */ |
6cdc0ccc AM |
2202 | Elf_Internal_Sym *isym; |
2203 | ||
2204 | /* Read this BFD's local symbols if we haven't done so already. */ | |
2205 | if (isymbuf == NULL) | |
2206 | { | |
2207 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2208 | if (isymbuf == NULL) | |
2209 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2210 | symtab_hdr->sh_info, 0, | |
2211 | NULL, NULL, NULL); | |
2212 | if (isymbuf == NULL) | |
2213 | goto error_return; | |
2214 | } | |
0752970e | 2215 | |
6cdc0ccc AM |
2216 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
2217 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
0752970e NC |
2218 | } |
2219 | else | |
2220 | { | |
2221 | unsigned long indx; | |
2222 | struct elf_link_hash_entry *h; | |
2223 | ||
2224 | /* An external symbol. */ | |
2225 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2226 | h = elf_sym_hashes (abfd)[indx]; | |
2227 | BFD_ASSERT (h != NULL); | |
2228 | if (h->root.type == bfd_link_hash_defined | |
2229 | || h->root.type == bfd_link_hash_defweak) | |
2230 | targetsec = h->root.u.def.section; | |
2231 | else | |
2232 | targetsec = NULL; | |
2233 | } | |
2234 | ||
2235 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
2236 | memset (p + 4, 0, 8); | |
2237 | if (targetsec != NULL) | |
f075ee0c | 2238 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
0752970e | 2239 | } |
c3668558 | 2240 | |
6cdc0ccc AM |
2241 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2242 | free (isymbuf); | |
2243 | if (internal_relocs != NULL | |
2244 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2245 | free (internal_relocs); | |
b34976b6 | 2246 | return TRUE; |
0752970e NC |
2247 | |
2248 | error_return: | |
6cdc0ccc AM |
2249 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2250 | free (isymbuf); | |
2251 | if (internal_relocs != NULL | |
2252 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2253 | free (internal_relocs); | |
b34976b6 | 2254 | return FALSE; |
0752970e NC |
2255 | } |
2256 | ||
aa91b392 | 2257 | static enum elf_reloc_type_class |
f51e552e AM |
2258 | elf32_m68k_reloc_type_class (rela) |
2259 | const Elf_Internal_Rela *rela; | |
aa91b392 | 2260 | { |
f51e552e | 2261 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
aa91b392 AS |
2262 | { |
2263 | case R_68K_RELATIVE: | |
2264 | return reloc_class_relative; | |
2265 | case R_68K_JMP_SLOT: | |
2266 | return reloc_class_plt; | |
2267 | case R_68K_COPY: | |
2268 | return reloc_class_copy; | |
2269 | default: | |
2270 | return reloc_class_normal; | |
2271 | } | |
2272 | } | |
2273 | ||
1715e0e3 AS |
2274 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
2275 | or (bfd_vma) -1 if it should not be included. */ | |
2276 | ||
2277 | static bfd_vma | |
2278 | elf_m68k_plt_sym_val (bfd_vma i, const asection *plt, | |
2279 | const arelent *rel ATTRIBUTE_UNUSED) | |
2280 | { | |
2281 | if (CPU32_FLAG (plt->owner)) | |
2282 | return plt->vma + (i + 1) * PLT_CPU32_ENTRY_SIZE; | |
2283 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
2284 | } | |
2285 | ||
252b5132 RH |
2286 | #define TARGET_BIG_SYM bfd_elf32_m68k_vec |
2287 | #define TARGET_BIG_NAME "elf32-m68k" | |
2288 | #define ELF_MACHINE_CODE EM_68K | |
2289 | #define ELF_MAXPAGESIZE 0x2000 | |
2290 | #define elf_backend_create_dynamic_sections \ | |
2291 | _bfd_elf_create_dynamic_sections | |
2292 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2293 | elf_m68k_link_hash_table_create | |
c152c796 | 2294 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link |
252b5132 RH |
2295 | |
2296 | #define elf_backend_check_relocs elf_m68k_check_relocs | |
2297 | #define elf_backend_adjust_dynamic_symbol \ | |
2298 | elf_m68k_adjust_dynamic_symbol | |
2299 | #define elf_backend_size_dynamic_sections \ | |
2300 | elf_m68k_size_dynamic_sections | |
2301 | #define elf_backend_relocate_section elf_m68k_relocate_section | |
2302 | #define elf_backend_finish_dynamic_symbol \ | |
2303 | elf_m68k_finish_dynamic_symbol | |
2304 | #define elf_backend_finish_dynamic_sections \ | |
2305 | elf_m68k_finish_dynamic_sections | |
2306 | #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook | |
2307 | #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook | |
9e1281c7 CM |
2308 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
2309 | elf32_m68k_merge_private_bfd_data | |
2310 | #define bfd_elf32_bfd_set_private_flags \ | |
2311 | elf32_m68k_set_private_flags | |
2312 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
2313 | elf32_m68k_print_private_bfd_data | |
aa91b392 | 2314 | #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class |
1715e0e3 | 2315 | #define elf_backend_plt_sym_val elf_m68k_plt_sym_val |
9e1281c7 | 2316 | |
252b5132 | 2317 | #define elf_backend_can_gc_sections 1 |
51b64d56 | 2318 | #define elf_backend_can_refcount 1 |
252b5132 RH |
2319 | #define elf_backend_want_got_plt 1 |
2320 | #define elf_backend_plt_readonly 1 | |
2321 | #define elf_backend_want_plt_sym 0 | |
2322 | #define elf_backend_got_header_size 12 | |
b491616a | 2323 | #define elf_backend_rela_normal 1 |
252b5132 RH |
2324 | |
2325 | #include "elf32-target.h" |