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252b5132 | 1 | /* PowerPC-specific support for 32-bit ELF |
d87bef3a | 2 | Copyright (C) 1994-2023 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Ian Lance Taylor, Cygnus Support. |
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 | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 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 | 17 | You should have received a copy of the GNU General Public License |
fc0bffd6 | 18 | along with this program; if not, write to the |
3e110533 | 19 | Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
53e09e0a | 20 | Boston, MA 02110-1301, USA. */ |
252b5132 | 21 | |
c09c8b42 AM |
22 | /* The assembler should generate a full set of section symbols even |
23 | when they appear unused. The linux kernel build tool recordmcount | |
24 | needs them. */ | |
25 | #define TARGET_KEEP_UNUSED_SECTION_SYMBOLS true | |
252b5132 | 26 | |
3db64b00 | 27 | #include "sysdep.h" |
183e98be | 28 | #include <stdarg.h> |
252b5132 | 29 | #include "bfd.h" |
252b5132 RH |
30 | #include "bfdlink.h" |
31 | #include "libbfd.h" | |
32 | #include "elf-bfd.h" | |
33 | #include "elf/ppc.h" | |
7619e7c7 | 34 | #include "elf32-ppc.h" |
9d8504b1 | 35 | #include "elf-vxworks.h" |
6177242a | 36 | #include "dwarf2.h" |
08dc996f | 37 | #include "opcode/ppc.h" |
252b5132 | 38 | |
bb294208 AM |
39 | /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */ |
40 | #define OCTETS_PER_BYTE(ABFD, SEC) 1 | |
41 | ||
b9c361e0 JL |
42 | typedef enum split16_format_type |
43 | { | |
44 | split16a_type = 0, | |
45 | split16d_type | |
46 | } | |
47 | split16_format_type; | |
48 | ||
f0fe0e16 | 49 | /* RELA relocations are used here. */ |
252b5132 | 50 | |
252b5132 | 51 | static bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
55fd94b0 | 52 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
7619e7c7 | 53 | static bfd_reloc_status_type ppc_elf_unhandled_reloc |
55fd94b0 | 54 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
252b5132 | 55 | |
70bccea4 AM |
56 | /* Branch prediction bit for branch taken relocs. */ |
57 | #define BRANCH_PREDICT_BIT 0x200000 | |
58 | /* Mask to set RA in memory instructions. */ | |
59 | #define RA_REGISTER_MASK 0x001f0000 | |
60 | /* Value to shift register by to insert RA. */ | |
61 | #define RA_REGISTER_SHIFT 16 | |
252b5132 RH |
62 | |
63 | /* The name of the dynamic interpreter. This is put in the .interp | |
64 | section. */ | |
252b5132 RH |
65 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
66 | ||
d7128ce4 | 67 | /* For old-style PLT. */ |
252b5132 RH |
68 | /* The number of single-slot PLT entries (the rest use two slots). */ |
69 | #define PLT_NUM_SINGLE_ENTRIES 8192 | |
70 | ||
d7128ce4 | 71 | /* For new-style .glink and .plt. */ |
a6aa5195 | 72 | #define GLINK_PLTRESOLVE 16*4 |
9e390558 | 73 | #define GLINK_ENTRY_SIZE(htab, h) \ |
407aa07c | 74 | ((4*4 \ |
9e390558 AM |
75 | + (h != NULL \ |
76 | && h == htab->tls_get_addr \ | |
77 | && !htab->params->no_tls_get_addr_opt ? 8*4 : 0) \ | |
78 | + (1u << htab->params->plt_stub_align) - 1) \ | |
79 | & -(1u << htab->params->plt_stub_align)) | |
d7128ce4 | 80 | |
9d8504b1 PB |
81 | /* VxWorks uses its own plt layout, filled in by the static linker. */ |
82 | ||
83 | /* The standard VxWorks PLT entry. */ | |
84 | #define VXWORKS_PLT_ENTRY_SIZE 32 | |
85 | static const bfd_vma ppc_elf_vxworks_plt_entry | |
86 | [VXWORKS_PLT_ENTRY_SIZE / 4] = | |
87 | { | |
07d6d2b8 AM |
88 | 0x3d800000, /* lis r12,0 */ |
89 | 0x818c0000, /* lwz r12,0(r12) */ | |
90 | 0x7d8903a6, /* mtctr r12 */ | |
91 | 0x4e800420, /* bctr */ | |
92 | 0x39600000, /* li r11,0 */ | |
93 | 0x48000000, /* b 14 <.PLT0resolve+0x4> */ | |
94 | 0x60000000, /* nop */ | |
95 | 0x60000000, /* nop */ | |
9d8504b1 PB |
96 | }; |
97 | static const bfd_vma ppc_elf_vxworks_pic_plt_entry | |
98 | [VXWORKS_PLT_ENTRY_SIZE / 4] = | |
99 | { | |
100 | 0x3d9e0000, /* addis r12,r30,0 */ | |
101 | 0x818c0000, /* lwz r12,0(r12) */ | |
102 | 0x7d8903a6, /* mtctr r12 */ | |
103 | 0x4e800420, /* bctr */ | |
104 | 0x39600000, /* li r11,0 */ | |
105 | 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ | |
106 | 0x60000000, /* nop */ | |
107 | 0x60000000, /* nop */ | |
108 | }; | |
109 | ||
110 | /* The initial VxWorks PLT entry. */ | |
111 | #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 | |
112 | static const bfd_vma ppc_elf_vxworks_plt0_entry | |
113 | [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = | |
114 | { | |
07d6d2b8 AM |
115 | 0x3d800000, /* lis r12,0 */ |
116 | 0x398c0000, /* addi r12,r12,0 */ | |
117 | 0x800c0008, /* lwz r0,8(r12) */ | |
118 | 0x7c0903a6, /* mtctr r0 */ | |
119 | 0x818c0004, /* lwz r12,4(r12) */ | |
120 | 0x4e800420, /* bctr */ | |
121 | 0x60000000, /* nop */ | |
122 | 0x60000000, /* nop */ | |
9d8504b1 PB |
123 | }; |
124 | static const bfd_vma ppc_elf_vxworks_pic_plt0_entry | |
125 | [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = | |
126 | { | |
127 | 0x819e0008, /* lwz r12,8(r30) */ | |
07d6d2b8 | 128 | 0x7d8903a6, /* mtctr r12 */ |
9d8504b1 | 129 | 0x819e0004, /* lwz r12,4(r30) */ |
07d6d2b8 AM |
130 | 0x4e800420, /* bctr */ |
131 | 0x60000000, /* nop */ | |
132 | 0x60000000, /* nop */ | |
133 | 0x60000000, /* nop */ | |
134 | 0x60000000, /* nop */ | |
9d8504b1 PB |
135 | }; |
136 | ||
137 | /* For executables, we have some additional relocations in | |
138 | .rela.plt.unloaded, for the kernel loader. */ | |
139 | ||
140 | /* The number of non-JMP_SLOT relocations per PLT0 slot. */ | |
141 | #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 | |
142 | /* The number of relocations in the PLTResolve slot. */ | |
143 | #define VXWORKS_PLTRESOLVE_RELOCS 2 | |
de194d85 | 144 | /* The number of relocations in the PLTResolve slot when creating |
9d8504b1 PB |
145 | a shared library. */ |
146 | #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 | |
147 | ||
d7128ce4 | 148 | /* Some instructions. */ |
d7128ce4 | 149 | #define ADDIS_11_11 0x3d6b0000 |
a6aa5195 AM |
150 | #define ADDIS_11_30 0x3d7e0000 |
151 | #define ADDIS_12_12 0x3d8c0000 | |
d7128ce4 | 152 | #define ADDI_11_11 0x396b0000 |
d7128ce4 | 153 | #define ADD_0_11_11 0x7c0b5a14 |
a7f2871e | 154 | #define ADD_3_12_2 0x7c6c1214 |
d7128ce4 | 155 | #define ADD_11_0_11 0x7d605a14 |
a6aa5195 | 156 | #define B 0x48000000 |
da3a2088 | 157 | #define BA 0x48000002 |
a6aa5195 | 158 | #define BCL_20_31 0x429f0005 |
d7128ce4 | 159 | #define BCTR 0x4e800420 |
a7f2871e AM |
160 | #define BEQLR 0x4d820020 |
161 | #define CMPWI_11_0 0x2c0b0000 | |
7e8aeb9a AM |
162 | #define LIS_11 0x3d600000 |
163 | #define LIS_12 0x3d800000 | |
a6aa5195 AM |
164 | #define LWZU_0_12 0x840c0000 |
165 | #define LWZ_0_12 0x800c0000 | |
a7f2871e | 166 | #define LWZ_11_3 0x81630000 |
a6aa5195 AM |
167 | #define LWZ_11_11 0x816b0000 |
168 | #define LWZ_11_30 0x817e0000 | |
a7f2871e | 169 | #define LWZ_12_3 0x81830000 |
a6aa5195 | 170 | #define LWZ_12_12 0x818c0000 |
a7f2871e AM |
171 | #define MR_0_3 0x7c601b78 |
172 | #define MR_3_0 0x7c030378 | |
a6aa5195 AM |
173 | #define MFLR_0 0x7c0802a6 |
174 | #define MFLR_12 0x7d8802a6 | |
175 | #define MTCTR_0 0x7c0903a6 | |
176 | #define MTCTR_11 0x7d6903a6 | |
177 | #define MTLR_0 0x7c0803a6 | |
178 | #define NOP 0x60000000 | |
179 | #define SUB_11_11_12 0x7d6c5850 | |
7619e7c7 AM |
180 | |
181 | /* Offset of tp and dtp pointers from start of TLS block. */ | |
182 | #define TP_OFFSET 0x7000 | |
183 | #define DTP_OFFSET 0x8000 | |
e87d4038 AM |
184 | |
185 | /* The value of a defined global symbol. */ | |
186 | #define SYM_VAL(SYM) \ | |
187 | ((SYM)->root.u.def.section->output_section->vma \ | |
188 | + (SYM)->root.u.def.section->output_offset \ | |
189 | + (SYM)->root.u.def.value) | |
7fce784e | 190 | \f |
46807bf4 AM |
191 | /* Relocation HOWTO's. */ |
192 | /* Like other ELF RELA targets that don't apply multiple | |
193 | field-altering relocations to the same localation, src_mask is | |
194 | always zero and pcrel_offset is the same as pc_relative. | |
195 | PowerPC can always use a zero bitpos, even when the field is not at | |
196 | the LSB. For example, a REL24 could use rightshift=2, bisize=24 | |
197 | and bitpos=2 which matches the ABI description, or as we do here, | |
198 | rightshift=0, bitsize=26 and bitpos=0. */ | |
199 | #define HOW(type, size, bitsize, mask, rightshift, pc_relative, \ | |
200 | complain, special_func) \ | |
201 | HOWTO (type, rightshift, size, bitsize, pc_relative, 0, \ | |
202 | complain_overflow_ ## complain, special_func, \ | |
0a1b45a2 | 203 | #type, false, 0, mask, pc_relative) |
46807bf4 | 204 | |
e47cd125 | 205 | static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; |
252b5132 | 206 | |
8da6118f | 207 | static reloc_howto_type ppc_elf_howto_raw[] = { |
252b5132 | 208 | /* This reloc does nothing. */ |
c94cb026 | 209 | HOW (R_PPC_NONE, 0, 0, 0, 0, false, dont, |
46807bf4 | 210 | bfd_elf_generic_reloc), |
252b5132 RH |
211 | |
212 | /* A standard 32 bit relocation. */ | |
c94cb026 | 213 | HOW (R_PPC_ADDR32, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 214 | bfd_elf_generic_reloc), |
252b5132 RH |
215 | |
216 | /* An absolute 26 bit branch; the lower two bits must be zero. | |
217 | FIXME: we don't check that, we just clear them. */ | |
c94cb026 | 218 | HOW (R_PPC_ADDR24, 4, 26, 0x3fffffc, 0, false, signed, |
46807bf4 | 219 | bfd_elf_generic_reloc), |
252b5132 RH |
220 | |
221 | /* A standard 16 bit relocation. */ | |
c94cb026 | 222 | HOW (R_PPC_ADDR16, 2, 16, 0xffff, 0, false, bitfield, |
46807bf4 | 223 | bfd_elf_generic_reloc), |
252b5132 RH |
224 | |
225 | /* A 16 bit relocation without overflow. */ | |
c94cb026 | 226 | HOW (R_PPC_ADDR16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 227 | bfd_elf_generic_reloc), |
252b5132 RH |
228 | |
229 | /* The high order 16 bits of an address. */ | |
c94cb026 | 230 | HOW (R_PPC_ADDR16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 231 | bfd_elf_generic_reloc), |
252b5132 RH |
232 | |
233 | /* The high order 16 bits of an address, plus 1 if the contents of | |
8da6118f | 234 | the low 16 bits, treated as a signed number, is negative. */ |
c94cb026 | 235 | HOW (R_PPC_ADDR16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 236 | ppc_elf_addr16_ha_reloc), |
252b5132 RH |
237 | |
238 | /* An absolute 16 bit branch; the lower two bits must be zero. | |
239 | FIXME: we don't check that, we just clear them. */ | |
c94cb026 | 240 | HOW (R_PPC_ADDR14, 4, 16, 0xfffc, 0, false, signed, |
46807bf4 | 241 | bfd_elf_generic_reloc), |
252b5132 RH |
242 | |
243 | /* An absolute 16 bit branch, for which bit 10 should be set to | |
244 | indicate that the branch is expected to be taken. The lower two | |
8da6118f | 245 | bits must be zero. */ |
c94cb026 | 246 | HOW (R_PPC_ADDR14_BRTAKEN, 4, 16, 0xfffc, 0, false, signed, |
46807bf4 | 247 | bfd_elf_generic_reloc), |
252b5132 RH |
248 | |
249 | /* An absolute 16 bit branch, for which bit 10 should be set to | |
250 | indicate that the branch is not expected to be taken. The lower | |
251 | two bits must be zero. */ | |
c94cb026 | 252 | HOW (R_PPC_ADDR14_BRNTAKEN, 4, 16, 0xfffc, 0, false, signed, |
46807bf4 | 253 | bfd_elf_generic_reloc), |
252b5132 | 254 | |
8da6118f | 255 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
c94cb026 | 256 | HOW (R_PPC_REL24, 4, 26, 0x3fffffc, 0, true, signed, |
46807bf4 | 257 | bfd_elf_generic_reloc), |
252b5132 | 258 | |
8da6118f | 259 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
c94cb026 | 260 | HOW (R_PPC_REL14, 4, 16, 0xfffc, 0, true, signed, |
46807bf4 | 261 | bfd_elf_generic_reloc), |
252b5132 | 262 | |
8da6118f | 263 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
252b5132 RH |
264 | the branch is expected to be taken. The lower two bits must be |
265 | zero. */ | |
c94cb026 | 266 | HOW (R_PPC_REL14_BRTAKEN, 4, 16, 0xfffc, 0, true, signed, |
46807bf4 | 267 | bfd_elf_generic_reloc), |
252b5132 | 268 | |
8da6118f | 269 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
252b5132 RH |
270 | the branch is not expected to be taken. The lower two bits must |
271 | be zero. */ | |
c94cb026 | 272 | HOW (R_PPC_REL14_BRNTAKEN, 4, 16, 0xfffc, 0, true, signed, |
46807bf4 | 273 | bfd_elf_generic_reloc), |
252b5132 RH |
274 | |
275 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the | |
276 | symbol. */ | |
c94cb026 | 277 | HOW (R_PPC_GOT16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 278 | ppc_elf_unhandled_reloc), |
252b5132 RH |
279 | |
280 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for | |
281 | the symbol. */ | |
c94cb026 | 282 | HOW (R_PPC_GOT16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 283 | ppc_elf_unhandled_reloc), |
252b5132 RH |
284 | |
285 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for | |
286 | the symbol. */ | |
c94cb026 | 287 | HOW (R_PPC_GOT16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 288 | ppc_elf_unhandled_reloc), |
252b5132 RH |
289 | |
290 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for | |
291 | the symbol. */ | |
c94cb026 | 292 | HOW (R_PPC_GOT16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 293 | ppc_elf_unhandled_reloc), |
252b5132 RH |
294 | |
295 | /* Like R_PPC_REL24, but referring to the procedure linkage table | |
296 | entry for the symbol. */ | |
c94cb026 | 297 | HOW (R_PPC_PLTREL24, 4, 26, 0x3fffffc, 0, true, signed, |
46807bf4 | 298 | ppc_elf_unhandled_reloc), |
252b5132 RH |
299 | |
300 | /* This is used only by the dynamic linker. The symbol should exist | |
301 | both in the object being run and in some shared library. The | |
302 | dynamic linker copies the data addressed by the symbol from the | |
303 | shared library into the object, because the object being | |
304 | run has to have the data at some particular address. */ | |
c94cb026 | 305 | HOW (R_PPC_COPY, 4, 32, 0, 0, false, dont, |
46807bf4 | 306 | ppc_elf_unhandled_reloc), |
252b5132 RH |
307 | |
308 | /* Like R_PPC_ADDR32, but used when setting global offset table | |
309 | entries. */ | |
c94cb026 | 310 | HOW (R_PPC_GLOB_DAT, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 311 | ppc_elf_unhandled_reloc), |
252b5132 RH |
312 | |
313 | /* Marks a procedure linkage table entry for a symbol. */ | |
c94cb026 | 314 | HOW (R_PPC_JMP_SLOT, 4, 32, 0, 0, false, dont, |
46807bf4 | 315 | ppc_elf_unhandled_reloc), |
252b5132 RH |
316 | |
317 | /* Used only by the dynamic linker. When the object is run, this | |
318 | longword is set to the load address of the object, plus the | |
319 | addend. */ | |
c94cb026 | 320 | HOW (R_PPC_RELATIVE, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 321 | bfd_elf_generic_reloc), |
252b5132 RH |
322 | |
323 | /* Like R_PPC_REL24, but uses the value of the symbol within the | |
324 | object rather than the final value. Normally used for | |
325 | _GLOBAL_OFFSET_TABLE_. */ | |
c94cb026 | 326 | HOW (R_PPC_LOCAL24PC, 4, 26, 0x3fffffc, 0, true, signed, |
46807bf4 | 327 | bfd_elf_generic_reloc), |
252b5132 RH |
328 | |
329 | /* Like R_PPC_ADDR32, but may be unaligned. */ | |
c94cb026 | 330 | HOW (R_PPC_UADDR32, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 331 | bfd_elf_generic_reloc), |
252b5132 RH |
332 | |
333 | /* Like R_PPC_ADDR16, but may be unaligned. */ | |
c94cb026 | 334 | HOW (R_PPC_UADDR16, 2, 16, 0xffff, 0, false, bitfield, |
46807bf4 | 335 | bfd_elf_generic_reloc), |
252b5132 RH |
336 | |
337 | /* 32-bit PC relative */ | |
c94cb026 | 338 | HOW (R_PPC_REL32, 4, 32, 0xffffffff, 0, true, dont, |
46807bf4 | 339 | bfd_elf_generic_reloc), |
252b5132 RH |
340 | |
341 | /* 32-bit relocation to the symbol's procedure linkage table. | |
c3668558 | 342 | FIXME: not supported. */ |
c94cb026 | 343 | HOW (R_PPC_PLT32, 4, 32, 0, 0, false, dont, |
46807bf4 | 344 | ppc_elf_unhandled_reloc), |
252b5132 RH |
345 | |
346 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. | |
c3668558 | 347 | FIXME: not supported. */ |
c94cb026 | 348 | HOW (R_PPC_PLTREL32, 4, 32, 0, 0, true, dont, |
46807bf4 | 349 | ppc_elf_unhandled_reloc), |
252b5132 RH |
350 | |
351 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for | |
352 | the symbol. */ | |
c94cb026 | 353 | HOW (R_PPC_PLT16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 354 | ppc_elf_unhandled_reloc), |
252b5132 RH |
355 | |
356 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for | |
357 | the symbol. */ | |
c94cb026 | 358 | HOW (R_PPC_PLT16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 359 | ppc_elf_unhandled_reloc), |
252b5132 RH |
360 | |
361 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for | |
362 | the symbol. */ | |
c94cb026 | 363 | HOW (R_PPC_PLT16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 364 | ppc_elf_unhandled_reloc), |
252b5132 RH |
365 | |
366 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with | |
367 | small data items. */ | |
c94cb026 | 368 | HOW (R_PPC_SDAREL16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 369 | ppc_elf_unhandled_reloc), |
252b5132 | 370 | |
c061c2d8 | 371 | /* 16-bit section relative relocation. */ |
c94cb026 | 372 | HOW (R_PPC_SECTOFF, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 373 | ppc_elf_unhandled_reloc), |
252b5132 | 374 | |
c3668558 | 375 | /* 16-bit lower half section relative relocation. */ |
c94cb026 | 376 | HOW (R_PPC_SECTOFF_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 377 | ppc_elf_unhandled_reloc), |
252b5132 | 378 | |
c3668558 | 379 | /* 16-bit upper half section relative relocation. */ |
c94cb026 | 380 | HOW (R_PPC_SECTOFF_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 381 | ppc_elf_unhandled_reloc), |
252b5132 | 382 | |
c3668558 | 383 | /* 16-bit upper half adjusted section relative relocation. */ |
c94cb026 | 384 | HOW (R_PPC_SECTOFF_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 385 | ppc_elf_unhandled_reloc), |
252b5132 | 386 | |
727fc41e | 387 | /* Marker relocs for TLS. */ |
c94cb026 | 388 | HOW (R_PPC_TLS, 4, 32, 0, 0, false, dont, |
46807bf4 AM |
389 | bfd_elf_generic_reloc), |
390 | ||
c94cb026 | 391 | HOW (R_PPC_TLSGD, 4, 32, 0, 0, false, dont, |
46807bf4 AM |
392 | bfd_elf_generic_reloc), |
393 | ||
c94cb026 | 394 | HOW (R_PPC_TLSLD, 4, 32, 0, 0, false, dont, |
46807bf4 | 395 | bfd_elf_generic_reloc), |
727fc41e | 396 | |
23cedd1d | 397 | /* Marker relocs on inline plt call instructions. */ |
c94cb026 | 398 | HOW (R_PPC_PLTSEQ, 4, 32, 0, 0, false, dont, |
46807bf4 AM |
399 | bfd_elf_generic_reloc), |
400 | ||
c94cb026 | 401 | HOW (R_PPC_PLTCALL, 4, 32, 0, 0, false, dont, |
46807bf4 | 402 | bfd_elf_generic_reloc), |
23cedd1d | 403 | |
7619e7c7 AM |
404 | /* Computes the load module index of the load module that contains the |
405 | definition of its TLS sym. */ | |
c94cb026 | 406 | HOW (R_PPC_DTPMOD32, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 407 | ppc_elf_unhandled_reloc), |
252b5132 | 408 | |
7619e7c7 AM |
409 | /* Computes a dtv-relative displacement, the difference between the value |
410 | of sym+add and the base address of the thread-local storage block that | |
411 | contains the definition of sym, minus 0x8000. */ | |
c94cb026 | 412 | HOW (R_PPC_DTPREL32, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 413 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
414 | |
415 | /* A 16 bit dtprel reloc. */ | |
c94cb026 | 416 | HOW (R_PPC_DTPREL16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 417 | ppc_elf_unhandled_reloc), |
252b5132 | 418 | |
7619e7c7 | 419 | /* Like DTPREL16, but no overflow. */ |
c94cb026 | 420 | HOW (R_PPC_DTPREL16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 421 | ppc_elf_unhandled_reloc), |
252b5132 | 422 | |
7619e7c7 | 423 | /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
c94cb026 | 424 | HOW (R_PPC_DTPREL16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 425 | ppc_elf_unhandled_reloc), |
252b5132 | 426 | |
7619e7c7 | 427 | /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
c94cb026 | 428 | HOW (R_PPC_DTPREL16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 429 | ppc_elf_unhandled_reloc), |
252b5132 | 430 | |
7619e7c7 AM |
431 | /* Computes a tp-relative displacement, the difference between the value of |
432 | sym+add and the value of the thread pointer (r13). */ | |
c94cb026 | 433 | HOW (R_PPC_TPREL32, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 434 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
435 | |
436 | /* A 16 bit tprel reloc. */ | |
c94cb026 | 437 | HOW (R_PPC_TPREL16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 438 | ppc_elf_unhandled_reloc), |
252b5132 | 439 | |
7619e7c7 | 440 | /* Like TPREL16, but no overflow. */ |
c94cb026 | 441 | HOW (R_PPC_TPREL16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 442 | ppc_elf_unhandled_reloc), |
252b5132 | 443 | |
7619e7c7 | 444 | /* Like TPREL16_LO, but next higher group of 16 bits. */ |
c94cb026 | 445 | HOW (R_PPC_TPREL16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 446 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
447 | |
448 | /* Like TPREL16_HI, but adjust for low 16 bits. */ | |
c94cb026 | 449 | HOW (R_PPC_TPREL16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 450 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
451 | |
452 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, | |
453 | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset | |
454 | to the first entry. */ | |
c94cb026 | 455 | HOW (R_PPC_GOT_TLSGD16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 456 | ppc_elf_unhandled_reloc), |
252b5132 | 457 | |
7619e7c7 | 458 | /* Like GOT_TLSGD16, but no overflow. */ |
c94cb026 | 459 | HOW (R_PPC_GOT_TLSGD16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 460 | ppc_elf_unhandled_reloc), |
252b5132 | 461 | |
7619e7c7 | 462 | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
c94cb026 | 463 | HOW (R_PPC_GOT_TLSGD16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 464 | ppc_elf_unhandled_reloc), |
252b5132 | 465 | |
7619e7c7 | 466 | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
c94cb026 | 467 | HOW (R_PPC_GOT_TLSGD16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 468 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
469 | |
470 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, | |
471 | with values (sym+add)@dtpmod and zero, and computes the offset to the | |
472 | first entry. */ | |
c94cb026 | 473 | HOW (R_PPC_GOT_TLSLD16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 474 | ppc_elf_unhandled_reloc), |
252b5132 | 475 | |
7619e7c7 | 476 | /* Like GOT_TLSLD16, but no overflow. */ |
c94cb026 | 477 | HOW (R_PPC_GOT_TLSLD16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 478 | ppc_elf_unhandled_reloc), |
252b5132 | 479 | |
7619e7c7 | 480 | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
c94cb026 | 481 | HOW (R_PPC_GOT_TLSLD16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 482 | ppc_elf_unhandled_reloc), |
252b5132 | 483 | |
7619e7c7 | 484 | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
c94cb026 | 485 | HOW (R_PPC_GOT_TLSLD16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 486 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
487 | |
488 | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes | |
489 | the offset to the entry. */ | |
c94cb026 | 490 | HOW (R_PPC_GOT_DTPREL16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 491 | ppc_elf_unhandled_reloc), |
252b5132 | 492 | |
7619e7c7 | 493 | /* Like GOT_DTPREL16, but no overflow. */ |
c94cb026 | 494 | HOW (R_PPC_GOT_DTPREL16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 495 | ppc_elf_unhandled_reloc), |
252b5132 | 496 | |
7619e7c7 | 497 | /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ |
c94cb026 | 498 | HOW (R_PPC_GOT_DTPREL16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 499 | ppc_elf_unhandled_reloc), |
252b5132 | 500 | |
7619e7c7 | 501 | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
c94cb026 | 502 | HOW (R_PPC_GOT_DTPREL16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 503 | ppc_elf_unhandled_reloc), |
c3668558 | 504 | |
7619e7c7 AM |
505 | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
506 | offset to the entry. */ | |
c94cb026 | 507 | HOW (R_PPC_GOT_TPREL16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 508 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
509 | |
510 | /* Like GOT_TPREL16, but no overflow. */ | |
c94cb026 | 511 | HOW (R_PPC_GOT_TPREL16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 512 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
513 | |
514 | /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ | |
c94cb026 | 515 | HOW (R_PPC_GOT_TPREL16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 516 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
517 | |
518 | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ | |
c94cb026 | 519 | HOW (R_PPC_GOT_TPREL16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 520 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
521 | |
522 | /* The remaining relocs are from the Embedded ELF ABI, and are not | |
523 | in the SVR4 ELF ABI. */ | |
524 | ||
525 | /* 32 bit value resulting from the addend minus the symbol. */ | |
c94cb026 | 526 | HOW (R_PPC_EMB_NADDR32, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 527 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
528 | |
529 | /* 16 bit value resulting from the addend minus the symbol. */ | |
c94cb026 | 530 | HOW (R_PPC_EMB_NADDR16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 531 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
532 | |
533 | /* 16 bit value resulting from the addend minus the symbol. */ | |
c94cb026 | 534 | HOW (R_PPC_EMB_NADDR16_LO, 2, 16, 0xffff, 0, false, dont, |
46807bf4 | 535 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
536 | |
537 | /* The high order 16 bits of the addend minus the symbol. */ | |
c94cb026 | 538 | HOW (R_PPC_EMB_NADDR16_HI, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 539 | ppc_elf_unhandled_reloc), |
7619e7c7 AM |
540 | |
541 | /* The high order 16 bits of the result of the addend minus the address, | |
542 | plus 1 if the contents of the low 16 bits, treated as a signed number, | |
543 | is negative. */ | |
c94cb026 | 544 | HOW (R_PPC_EMB_NADDR16_HA, 2, 16, 0xffff, 16, false, dont, |
46807bf4 | 545 | ppc_elf_unhandled_reloc), |
25dbc73a AM |
546 | |
547 | /* 16 bit value resulting from allocating a 4 byte word to hold an | |
548 | address in the .sdata section, and returning the offset from | |
549 | _SDA_BASE_ for that relocation. */ | |
c94cb026 | 550 | HOW (R_PPC_EMB_SDAI16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 551 | ppc_elf_unhandled_reloc), |
25dbc73a AM |
552 | |
553 | /* 16 bit value resulting from allocating a 4 byte word to hold an | |
554 | address in the .sdata2 section, and returning the offset from | |
555 | _SDA2_BASE_ for that relocation. */ | |
c94cb026 | 556 | HOW (R_PPC_EMB_SDA2I16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 557 | ppc_elf_unhandled_reloc), |
25dbc73a AM |
558 | |
559 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with | |
560 | small data items. */ | |
c94cb026 | 561 | HOW (R_PPC_EMB_SDA2REL, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 562 | ppc_elf_unhandled_reloc), |
25dbc73a AM |
563 | |
564 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit | |
565 | signed offset from the appropriate base, and filling in the register | |
566 | field with the appropriate register (0, 2, or 13). */ | |
c94cb026 | 567 | HOW (R_PPC_EMB_SDA21, 4, 16, 0xffff, 0, false, signed, |
46807bf4 | 568 | ppc_elf_unhandled_reloc), |
25dbc73a AM |
569 | |
570 | /* Relocation not handled: R_PPC_EMB_MRKREF */ | |
571 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ | |
572 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ | |
573 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ | |
574 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ | |
575 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ | |
576 | ||
577 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling | |
578 | in the 16 bit signed offset from the appropriate base, and filling in the | |
579 | register field with the appropriate register (0, 2, or 13). */ | |
c94cb026 | 580 | HOW (R_PPC_EMB_RELSDA, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 581 | ppc_elf_unhandled_reloc), |
25dbc73a | 582 | |
b9c361e0 | 583 | /* A relative 8 bit branch. */ |
c94cb026 | 584 | HOW (R_PPC_VLE_REL8, 2, 8, 0xff, 1, true, signed, |
46807bf4 | 585 | bfd_elf_generic_reloc), |
68ffbac6 | 586 | |
b9c361e0 | 587 | /* A relative 15 bit branch. */ |
c94cb026 | 588 | HOW (R_PPC_VLE_REL15, 4, 16, 0xfffe, 0, true, signed, |
46807bf4 | 589 | bfd_elf_generic_reloc), |
b9c361e0 | 590 | |
68ffbac6 | 591 | /* A relative 24 bit branch. */ |
c94cb026 | 592 | HOW (R_PPC_VLE_REL24, 4, 25, 0x1fffffe, 0, true, signed, |
46807bf4 | 593 | bfd_elf_generic_reloc), |
b9c361e0 JL |
594 | |
595 | /* The 16 LSBS in split16a format. */ | |
c94cb026 | 596 | HOW (R_PPC_VLE_LO16A, 4, 16, 0x1f07ff, 0, false, dont, |
46807bf4 | 597 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
598 | |
599 | /* The 16 LSBS in split16d format. */ | |
c94cb026 | 600 | HOW (R_PPC_VLE_LO16D, 4, 16, 0x3e007ff, 0, false, dont, |
46807bf4 | 601 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
602 | |
603 | /* Bits 16-31 split16a format. */ | |
c94cb026 | 604 | HOW (R_PPC_VLE_HI16A, 4, 16, 0x1f07ff, 16, false, dont, |
46807bf4 | 605 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
606 | |
607 | /* Bits 16-31 split16d format. */ | |
c94cb026 | 608 | HOW (R_PPC_VLE_HI16D, 4, 16, 0x3e007ff, 16, false, dont, |
46807bf4 | 609 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
610 | |
611 | /* Bits 16-31 (High Adjusted) in split16a format. */ | |
c94cb026 | 612 | HOW (R_PPC_VLE_HA16A, 4, 16, 0x1f07ff, 16, false, dont, |
46807bf4 | 613 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
614 | |
615 | /* Bits 16-31 (High Adjusted) in split16d format. */ | |
c94cb026 | 616 | HOW (R_PPC_VLE_HA16D, 4, 16, 0x3e007ff, 16, false, dont, |
46807bf4 | 617 | ppc_elf_unhandled_reloc), |
b9c361e0 | 618 | |
86c95733 AM |
619 | /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i |
620 | instructions. If the register base is 0 then the linker changes | |
621 | the e_add16i to an e_li instruction. */ | |
c94cb026 | 622 | HOW (R_PPC_VLE_SDA21, 4, 16, 0xffff, 0, false, signed, |
46807bf4 | 623 | ppc_elf_unhandled_reloc), |
b9c361e0 | 624 | |
86c95733 | 625 | /* Like R_PPC_VLE_SDA21 but ignore overflow. */ |
c94cb026 | 626 | HOW (R_PPC_VLE_SDA21_LO, 4, 16, 0xffff, 0, false, dont, |
46807bf4 | 627 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
628 | |
629 | /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ | |
c94cb026 | 630 | HOW (R_PPC_VLE_SDAREL_LO16A, 4, 16, 0x1f07ff, 0, false, dont, |
46807bf4 | 631 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
632 | |
633 | /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ | |
c94cb026 | 634 | HOW (R_PPC_VLE_SDAREL_LO16D, 4, 16, 0x3e007ff, 0, false, dont, |
46807bf4 | 635 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
636 | |
637 | /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ | |
c94cb026 | 638 | HOW (R_PPC_VLE_SDAREL_HI16A, 4, 16, 0x1f07ff, 16, false, dont, |
46807bf4 | 639 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
640 | |
641 | /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ | |
c94cb026 | 642 | HOW (R_PPC_VLE_SDAREL_HI16D, 4, 16, 0x3e007ff, 16, false, dont, |
46807bf4 | 643 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
644 | |
645 | /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ | |
c94cb026 | 646 | HOW (R_PPC_VLE_SDAREL_HA16A, 4, 16, 0x1f07ff, 16, false, dont, |
46807bf4 | 647 | ppc_elf_unhandled_reloc), |
b9c361e0 JL |
648 | |
649 | /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ | |
c94cb026 | 650 | HOW (R_PPC_VLE_SDAREL_HA16D, 4, 16, 0x3e007ff, 16, false, dont, |
46807bf4 | 651 | ppc_elf_unhandled_reloc), |
b9c361e0 | 652 | |
83eef883 | 653 | /* e_li split20 format. */ |
c94cb026 | 654 | HOW (R_PPC_VLE_ADDR20, 4, 20, 0x1f7fff, 0, false, dont, |
bb6bf75e | 655 | ppc_elf_unhandled_reloc), |
46807bf4 | 656 | |
c94cb026 | 657 | HOW (R_PPC_IRELATIVE, 4, 32, 0xffffffff, 0, false, dont, |
46807bf4 | 658 | ppc_elf_unhandled_reloc), |
e054468f | 659 | |
d7128ce4 | 660 | /* A 16 bit relative relocation. */ |
c94cb026 | 661 | HOW (R_PPC_REL16, 2, 16, 0xffff, 0, true, signed, |
46807bf4 | 662 | bfd_elf_generic_reloc), |
d7128ce4 AM |
663 | |
664 | /* A 16 bit relative relocation without overflow. */ | |
c94cb026 | 665 | HOW (R_PPC_REL16_LO, 2, 16, 0xffff, 0, true, dont, |
46807bf4 | 666 | bfd_elf_generic_reloc), |
d7128ce4 AM |
667 | |
668 | /* The high order 16 bits of a relative address. */ | |
c94cb026 | 669 | HOW (R_PPC_REL16_HI, 2, 16, 0xffff, 16, true, dont, |
46807bf4 | 670 | bfd_elf_generic_reloc), |
d7128ce4 AM |
671 | |
672 | /* The high order 16 bits of a relative address, plus 1 if the contents of | |
673 | the low 16 bits, treated as a signed number, is negative. */ | |
c94cb026 | 674 | HOW (R_PPC_REL16_HA, 2, 16, 0xffff, 16, true, dont, |
46807bf4 | 675 | ppc_elf_addr16_ha_reloc), |
d7128ce4 | 676 | |
a680de9a | 677 | /* Like R_PPC_REL16_HA but for split field in addpcis. */ |
c94cb026 | 678 | HOW (R_PPC_REL16DX_HA, 4, 16, 0x1fffc1, 16, true, signed, |
46807bf4 | 679 | ppc_elf_addr16_ha_reloc), |
a680de9a | 680 | |
7ba71655 | 681 | /* A split-field reloc for addpcis, non-relative (gas internal use only). */ |
c94cb026 | 682 | HOW (R_PPC_16DX_HA, 4, 16, 0x1fffc1, 16, false, signed, |
46807bf4 | 683 | ppc_elf_addr16_ha_reloc), |
7ba71655 | 684 | |
25dbc73a | 685 | /* GNU extension to record C++ vtable hierarchy. */ |
5d0feb98 | 686 | HOW (R_PPC_GNU_VTINHERIT, 0, 0, 0, 0, false, dont, |
46807bf4 | 687 | NULL), |
25dbc73a AM |
688 | |
689 | /* GNU extension to record C++ vtable member usage. */ | |
5d0feb98 | 690 | HOW (R_PPC_GNU_VTENTRY, 0, 0, 0, 0, false, dont, |
46807bf4 | 691 | NULL), |
7619e7c7 | 692 | |
25dbc73a | 693 | /* Phony reloc to handle AIX style TOC entries. */ |
c94cb026 | 694 | HOW (R_PPC_TOC16, 2, 16, 0xffff, 0, false, signed, |
46807bf4 | 695 | ppc_elf_unhandled_reloc), |
25dbc73a AM |
696 | }; |
697 | \f | |
698 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ | |
699 | ||
700 | static void | |
701 | ppc_elf_howto_init (void) | |
702 | { | |
703 | unsigned int i, type; | |
704 | ||
705 | for (i = 0; | |
706 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); | |
707 | i++) | |
708 | { | |
709 | type = ppc_elf_howto_raw[i].type; | |
710 | if (type >= (sizeof (ppc_elf_howto_table) | |
711 | / sizeof (ppc_elf_howto_table[0]))) | |
712 | abort (); | |
713 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; | |
714 | } | |
715 | } | |
716 | ||
717 | static reloc_howto_type * | |
718 | ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
719 | bfd_reloc_code_real_type code) | |
720 | { | |
721 | enum elf_ppc_reloc_type r; | |
722 | ||
723 | /* Initialize howto table if not already done. */ | |
724 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) | |
725 | ppc_elf_howto_init (); | |
726 | ||
727 | switch (code) | |
728 | { | |
729 | default: | |
730 | return NULL; | |
731 | ||
732 | case BFD_RELOC_NONE: r = R_PPC_NONE; break; | |
733 | case BFD_RELOC_32: r = R_PPC_ADDR32; break; | |
734 | case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; | |
1fe532cf | 735 | case BFD_RELOC_PPC64_ADDR16_DS: |
25dbc73a | 736 | case BFD_RELOC_16: r = R_PPC_ADDR16; break; |
1fe532cf | 737 | case BFD_RELOC_PPC64_ADDR16_LO_DS: |
25dbc73a AM |
738 | case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; |
739 | case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; | |
740 | case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; | |
741 | case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; | |
742 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; | |
743 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; | |
744 | case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; | |
745 | case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; | |
746 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; | |
747 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; | |
1fe532cf | 748 | case BFD_RELOC_PPC64_GOT16_DS: |
25dbc73a | 749 | case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; |
1fe532cf | 750 | case BFD_RELOC_PPC64_GOT16_LO_DS: |
25dbc73a AM |
751 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; |
752 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; | |
753 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; | |
754 | case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; | |
755 | case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; | |
756 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; | |
757 | case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; | |
758 | case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; | |
759 | case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; | |
760 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; | |
1fe532cf | 761 | case BFD_RELOC_PPC64_PLT16_LO_DS: |
25dbc73a AM |
762 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; |
763 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; | |
764 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; | |
765 | case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; | |
1fe532cf | 766 | case BFD_RELOC_PPC64_SECTOFF_DS: |
25dbc73a | 767 | case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; |
1fe532cf | 768 | case BFD_RELOC_PPC64_SECTOFF_LO_DS: |
25dbc73a AM |
769 | case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; |
770 | case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; | |
771 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; | |
772 | case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; | |
1fe532cf | 773 | case BFD_RELOC_PPC64_TOC16_DS: |
25dbc73a AM |
774 | case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; |
775 | case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; | |
727fc41e AM |
776 | case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; |
777 | case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; | |
25dbc73a | 778 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; |
1fe532cf | 779 | case BFD_RELOC_PPC64_TPREL16_DS: |
25dbc73a | 780 | case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; |
1fe532cf | 781 | case BFD_RELOC_PPC64_TPREL16_LO_DS: |
25dbc73a AM |
782 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; |
783 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; | |
784 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; | |
785 | case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; | |
1fe532cf | 786 | case BFD_RELOC_PPC64_DTPREL16_DS: |
25dbc73a | 787 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; |
1fe532cf | 788 | case BFD_RELOC_PPC64_DTPREL16_LO_DS: |
25dbc73a AM |
789 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; |
790 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; | |
791 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; | |
792 | case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; | |
793 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; | |
794 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; | |
795 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; | |
796 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; | |
797 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; | |
798 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; | |
799 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; | |
800 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; | |
801 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; | |
802 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; | |
803 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; | |
804 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; | |
805 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; | |
806 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; | |
807 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; | |
808 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; | |
809 | case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; | |
810 | case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; | |
811 | case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; | |
812 | case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; | |
813 | case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; | |
814 | case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; | |
815 | case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; | |
816 | case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; | |
817 | case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; | |
818 | case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; | |
819 | case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; | |
820 | case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; | |
821 | case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; | |
822 | case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; | |
823 | case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; | |
824 | case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; | |
b9c361e0 JL |
825 | case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; |
826 | case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; | |
827 | case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; | |
828 | case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; | |
829 | case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; | |
830 | case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; | |
831 | case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; | |
832 | case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; | |
833 | case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; | |
834 | case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; | |
835 | case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; | |
836 | case BFD_RELOC_PPC_VLE_SDAREL_LO16A: | |
837 | r = R_PPC_VLE_SDAREL_LO16A; | |
838 | break; | |
839 | case BFD_RELOC_PPC_VLE_SDAREL_LO16D: | |
840 | r = R_PPC_VLE_SDAREL_LO16D; | |
841 | break; | |
842 | case BFD_RELOC_PPC_VLE_SDAREL_HI16A: | |
843 | r = R_PPC_VLE_SDAREL_HI16A; | |
844 | break; | |
845 | case BFD_RELOC_PPC_VLE_SDAREL_HI16D: | |
846 | r = R_PPC_VLE_SDAREL_HI16D; | |
847 | break; | |
848 | case BFD_RELOC_PPC_VLE_SDAREL_HA16A: | |
849 | r = R_PPC_VLE_SDAREL_HA16A; | |
850 | break; | |
851 | case BFD_RELOC_PPC_VLE_SDAREL_HA16D: | |
852 | r = R_PPC_VLE_SDAREL_HA16D; | |
853 | break; | |
d7128ce4 AM |
854 | case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; |
855 | case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; | |
856 | case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; | |
857 | case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; | |
7ba71655 | 858 | case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break; |
a680de9a | 859 | case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break; |
25dbc73a AM |
860 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; |
861 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; | |
862 | } | |
863 | ||
864 | return ppc_elf_howto_table[r]; | |
865 | }; | |
866 | ||
157090f7 AM |
867 | static reloc_howto_type * |
868 | ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
869 | const char *r_name) | |
870 | { | |
871 | unsigned int i; | |
872 | ||
873 | for (i = 0; | |
874 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); | |
875 | i++) | |
876 | if (ppc_elf_howto_raw[i].name != NULL | |
877 | && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) | |
878 | return &ppc_elf_howto_raw[i]; | |
879 | ||
880 | return NULL; | |
881 | } | |
882 | ||
25dbc73a AM |
883 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
884 | ||
0a1b45a2 | 885 | static bool |
4aef7643 | 886 | ppc_elf_info_to_howto (bfd *abfd, |
25dbc73a AM |
887 | arelent *cache_ptr, |
888 | Elf_Internal_Rela *dst) | |
889 | { | |
cd21f5da NC |
890 | unsigned int r_type; |
891 | ||
25dbc73a AM |
892 | /* Initialize howto table if not already done. */ |
893 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) | |
894 | ppc_elf_howto_init (); | |
895 | ||
cd21f5da NC |
896 | r_type = ELF32_R_TYPE (dst->r_info); |
897 | if (r_type >= R_PPC_max) | |
898 | { | |
695344c0 | 899 | /* xgettext:c-format */ |
0aa13fee | 900 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
4eca0228 | 901 | abfd, r_type); |
cd21f5da | 902 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 903 | return false; |
cd21f5da | 904 | } |
f3185997 | 905 | |
cd21f5da | 906 | cache_ptr->howto = ppc_elf_howto_table[r_type]; |
375de94a AM |
907 | |
908 | /* Just because the above assert didn't trigger doesn't mean that | |
909 | ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ | |
f3185997 | 910 | if (cache_ptr->howto == NULL) |
375de94a | 911 | { |
695344c0 | 912 | /* xgettext:c-format */ |
0aa13fee | 913 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
4eca0228 | 914 | abfd, r_type); |
375de94a AM |
915 | bfd_set_error (bfd_error_bad_value); |
916 | ||
0a1b45a2 | 917 | return false; |
375de94a | 918 | } |
f3185997 | 919 | |
0a1b45a2 | 920 | return true; |
25dbc73a AM |
921 | } |
922 | ||
d7128ce4 | 923 | /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ |
25dbc73a AM |
924 | |
925 | static bfd_reloc_status_type | |
4aef7643 | 926 | ppc_elf_addr16_ha_reloc (bfd *abfd, |
25dbc73a AM |
927 | arelent *reloc_entry, |
928 | asymbol *symbol, | |
4aef7643 | 929 | void *data, |
25dbc73a AM |
930 | asection *input_section, |
931 | bfd *output_bfd, | |
932 | char **error_message ATTRIBUTE_UNUSED) | |
933 | { | |
a680de9a PB |
934 | enum elf_ppc_reloc_type r_type; |
935 | long insn; | |
936 | bfd_size_type octets; | |
937 | bfd_vma value; | |
25dbc73a AM |
938 | |
939 | if (output_bfd != NULL) | |
940 | { | |
941 | reloc_entry->address += input_section->output_offset; | |
942 | return bfd_reloc_ok; | |
943 | } | |
944 | ||
a680de9a PB |
945 | reloc_entry->addend += 0x8000; |
946 | r_type = reloc_entry->howto->type; | |
947 | if (r_type != R_PPC_REL16DX_HA) | |
948 | return bfd_reloc_continue; | |
949 | ||
950 | value = 0; | |
951 | if (!bfd_is_com_section (symbol->section)) | |
952 | value = symbol->value; | |
953 | value += (reloc_entry->addend | |
954 | + symbol->section->output_offset | |
955 | + symbol->section->output_section->vma); | |
956 | value -= (reloc_entry->address | |
957 | + input_section->output_offset | |
958 | + input_section->output_section->vma); | |
959 | value >>= 16; | |
960 | ||
bb294208 | 961 | octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section); |
b54509b8 AM |
962 | if (!bfd_reloc_offset_in_range (reloc_entry->howto, abfd, |
963 | input_section, octets)) | |
964 | return bfd_reloc_outofrange; | |
965 | ||
a680de9a PB |
966 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
967 | insn &= ~0x1fffc1; | |
968 | insn |= (value & 0xffc1) | ((value & 0x3e) << 15); | |
969 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); | |
970 | return bfd_reloc_ok; | |
25dbc73a AM |
971 | } |
972 | ||
973 | static bfd_reloc_status_type | |
974 | ppc_elf_unhandled_reloc (bfd *abfd, | |
975 | arelent *reloc_entry, | |
976 | asymbol *symbol, | |
977 | void *data, | |
978 | asection *input_section, | |
979 | bfd *output_bfd, | |
980 | char **error_message) | |
981 | { | |
982 | /* If this is a relocatable link (output_bfd test tells us), just | |
983 | call the generic function. Any adjustment will be done at final | |
984 | link time. */ | |
985 | if (output_bfd != NULL) | |
986 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
987 | input_section, output_bfd, error_message); | |
988 | ||
989 | if (error_message != NULL) | |
990 | { | |
7fbd5f4e AM |
991 | static char *message; |
992 | free (message); | |
993 | if (asprintf (&message, _("generic linker can't handle %s"), | |
994 | reloc_entry->howto->name) < 0) | |
995 | message = NULL; | |
996 | *error_message = message; | |
25dbc73a AM |
997 | } |
998 | return bfd_reloc_dangerous; | |
999 | } | |
1000 | \f | |
1001 | /* Sections created by the linker. */ | |
1002 | ||
1003 | typedef struct elf_linker_section | |
1004 | { | |
c9a2f333 | 1005 | /* Pointer to the bfd section. */ |
25dbc73a | 1006 | asection *section; |
c9a2f333 AM |
1007 | /* Section name. */ |
1008 | const char *name; | |
1009 | /* Associated bss section name. */ | |
1010 | const char *bss_name; | |
1011 | /* Associated symbol name. */ | |
1012 | const char *sym_name; | |
046183de AM |
1013 | /* Associated symbol. */ |
1014 | struct elf_link_hash_entry *sym; | |
25dbc73a AM |
1015 | } elf_linker_section_t; |
1016 | ||
1017 | /* Linked list of allocated pointer entries. This hangs off of the | |
1018 | symbol lists, and provides allows us to return different pointers, | |
1019 | based on different addend's. */ | |
1020 | ||
1021 | typedef struct elf_linker_section_pointers | |
1022 | { | |
1023 | /* next allocated pointer for this symbol */ | |
1024 | struct elf_linker_section_pointers *next; | |
1025 | /* offset of pointer from beginning of section */ | |
1026 | bfd_vma offset; | |
1027 | /* addend used */ | |
1028 | bfd_vma addend; | |
1029 | /* which linker section this is */ | |
1030 | elf_linker_section_t *lsect; | |
25dbc73a AM |
1031 | } elf_linker_section_pointers_t; |
1032 | ||
1033 | struct ppc_elf_obj_tdata | |
1034 | { | |
1035 | struct elf_obj_tdata elf; | |
1036 | ||
1037 | /* A mapping from local symbols to offsets into the various linker | |
1038 | sections added. This is index by the symbol index. */ | |
1039 | elf_linker_section_pointers_t **linker_section_pointers; | |
016687f8 AM |
1040 | |
1041 | /* Flags used to auto-detect plt type. */ | |
1042 | unsigned int makes_plt_call : 1; | |
1043 | unsigned int has_rel16 : 1; | |
25dbc73a AM |
1044 | }; |
1045 | ||
1046 | #define ppc_elf_tdata(bfd) \ | |
1047 | ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) | |
7619e7c7 | 1048 | |
25dbc73a AM |
1049 | #define elf_local_ptr_offsets(bfd) \ |
1050 | (ppc_elf_tdata (bfd)->linker_section_pointers) | |
7619e7c7 | 1051 | |
0c8d6e5c AM |
1052 | #define is_ppc_elf(bfd) \ |
1053 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
4dfe6ac6 | 1054 | && elf_object_id (bfd) == PPC32_ELF_DATA) |
0c8d6e5c | 1055 | |
25dbc73a | 1056 | /* Override the generic function because we store some extras. */ |
7619e7c7 | 1057 | |
0a1b45a2 | 1058 | static bool |
25dbc73a AM |
1059 | ppc_elf_mkobject (bfd *abfd) |
1060 | { | |
0ffa91dd | 1061 | return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), |
4dfe6ac6 | 1062 | PPC32_ELF_DATA); |
25dbc73a | 1063 | } |
7619e7c7 | 1064 | |
14b57c7c AM |
1065 | /* When defaulting arch/mach, decode apuinfo to find a better match. */ |
1066 | ||
0a1b45a2 | 1067 | bool |
14b57c7c AM |
1068 | _bfd_elf_ppc_set_arch (bfd *abfd) |
1069 | { | |
1070 | unsigned long mach = 0; | |
1071 | asection *s; | |
1072 | unsigned char *contents; | |
1073 | ||
1074 | if (abfd->arch_info->bits_per_word == 32 | |
1075 | && bfd_big_endian (abfd)) | |
1076 | { | |
1077 | ||
1078 | for (s = abfd->sections; s != NULL; s = s->next) | |
1079 | if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0) | |
1080 | break; | |
1081 | if (s != NULL) | |
1082 | mach = bfd_mach_ppc_vle; | |
1083 | } | |
1084 | ||
1085 | if (mach == 0) | |
1086 | { | |
1087 | s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); | |
62a47958 AM |
1088 | if (s != NULL |
1089 | && s->size >= 24 | |
1090 | && bfd_malloc_and_get_section (abfd, s, &contents)) | |
14b57c7c AM |
1091 | { |
1092 | unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4); | |
1093 | unsigned int i; | |
1094 | ||
1095 | for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4) | |
1096 | { | |
1097 | unsigned int val = bfd_get_32 (abfd, contents + i); | |
1098 | switch (val >> 16) | |
1099 | { | |
1100 | case PPC_APUINFO_PMR: | |
1101 | case PPC_APUINFO_RFMCI: | |
1102 | if (mach == 0) | |
1103 | mach = bfd_mach_ppc_titan; | |
1104 | break; | |
1105 | ||
1106 | case PPC_APUINFO_ISEL: | |
1107 | case PPC_APUINFO_CACHELCK: | |
1108 | if (mach == bfd_mach_ppc_titan) | |
1109 | mach = bfd_mach_ppc_e500mc; | |
1110 | break; | |
1111 | ||
1112 | case PPC_APUINFO_SPE: | |
1113 | case PPC_APUINFO_EFS: | |
1114 | case PPC_APUINFO_BRLOCK: | |
1115 | if (mach != bfd_mach_ppc_vle) | |
1116 | mach = bfd_mach_ppc_e500; | |
8941017b | 1117 | break; |
14b57c7c AM |
1118 | |
1119 | case PPC_APUINFO_VLE: | |
1120 | mach = bfd_mach_ppc_vle; | |
1121 | break; | |
1122 | ||
1123 | default: | |
1124 | mach = -1ul; | |
1125 | } | |
1126 | } | |
1127 | free (contents); | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | if (mach != 0 && mach != -1ul) | |
1132 | { | |
1133 | const bfd_arch_info_type *arch; | |
1134 | ||
1135 | for (arch = abfd->arch_info->next; arch; arch = arch->next) | |
1136 | if (arch->mach == mach) | |
1137 | { | |
1138 | abfd->arch_info = arch; | |
1139 | break; | |
1140 | } | |
1141 | } | |
0a1b45a2 | 1142 | return true; |
14b57c7c AM |
1143 | } |
1144 | ||
25dbc73a | 1145 | /* Fix bad default arch selected for a 32 bit input bfd when the |
14b57c7c | 1146 | default is 64 bit. Also select arch based on apuinfo. */ |
7619e7c7 | 1147 | |
0a1b45a2 | 1148 | static bool |
25dbc73a AM |
1149 | ppc_elf_object_p (bfd *abfd) |
1150 | { | |
14b57c7c | 1151 | if (!abfd->arch_info->the_default) |
0a1b45a2 | 1152 | return true; |
14b57c7c AM |
1153 | |
1154 | if (abfd->arch_info->bits_per_word == 64) | |
25dbc73a AM |
1155 | { |
1156 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); | |
7619e7c7 | 1157 | |
25dbc73a AM |
1158 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) |
1159 | { | |
1160 | /* Relies on arch after 64 bit default being 32 bit default. */ | |
1161 | abfd->arch_info = abfd->arch_info->next; | |
1162 | BFD_ASSERT (abfd->arch_info->bits_per_word == 32); | |
1163 | } | |
1164 | } | |
14b57c7c | 1165 | return _bfd_elf_ppc_set_arch (abfd); |
25dbc73a | 1166 | } |
7619e7c7 | 1167 | |
25dbc73a | 1168 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
7619e7c7 | 1169 | |
0a1b45a2 | 1170 | static bool |
25dbc73a AM |
1171 | ppc_elf_set_private_flags (bfd *abfd, flagword flags) |
1172 | { | |
1173 | BFD_ASSERT (!elf_flags_init (abfd) | |
1174 | || elf_elfheader (abfd)->e_flags == flags); | |
7619e7c7 | 1175 | |
25dbc73a | 1176 | elf_elfheader (abfd)->e_flags = flags; |
0a1b45a2 AM |
1177 | elf_flags_init (abfd) = true; |
1178 | return true; | |
25dbc73a AM |
1179 | } |
1180 | ||
25dbc73a | 1181 | /* Support for core dump NOTE sections. */ |
deaaf2f3 | 1182 | |
0a1b45a2 | 1183 | static bool |
25dbc73a | 1184 | ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
252b5132 | 1185 | { |
25dbc73a AM |
1186 | int offset; |
1187 | unsigned int size; | |
252b5132 | 1188 | |
25dbc73a AM |
1189 | switch (note->descsz) |
1190 | { | |
1191 | default: | |
0a1b45a2 | 1192 | return false; |
252b5132 | 1193 | |
25dbc73a AM |
1194 | case 268: /* Linux/PPC. */ |
1195 | /* pr_cursig */ | |
228e534f | 1196 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
deaaf2f3 | 1197 | |
25dbc73a | 1198 | /* pr_pid */ |
228e534f | 1199 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
9abc968f | 1200 | |
25dbc73a AM |
1201 | /* pr_reg */ |
1202 | offset = 72; | |
1203 | size = 192; | |
deaaf2f3 | 1204 | |
25dbc73a AM |
1205 | break; |
1206 | } | |
deaaf2f3 | 1207 | |
25dbc73a AM |
1208 | /* Make a ".reg/999" section. */ |
1209 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
1210 | size, note->descpos + offset); | |
1211 | } | |
252b5132 | 1212 | |
0a1b45a2 | 1213 | static bool |
25dbc73a AM |
1214 | ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
1215 | { | |
1216 | switch (note->descsz) | |
deaaf2f3 | 1217 | { |
25dbc73a | 1218 | default: |
0a1b45a2 | 1219 | return false; |
deaaf2f3 | 1220 | |
25dbc73a | 1221 | case 128: /* Linux/PPC elf_prpsinfo. */ |
228e534f | 1222 | elf_tdata (abfd)->core->pid |
bc989cdc | 1223 | = bfd_get_32 (abfd, note->descdata + 16); |
228e534f | 1224 | elf_tdata (abfd)->core->program |
25dbc73a | 1225 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
228e534f | 1226 | elf_tdata (abfd)->core->command |
25dbc73a AM |
1227 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
1228 | } | |
9abc968f | 1229 | |
25dbc73a AM |
1230 | /* Note that for some reason, a spurious space is tacked |
1231 | onto the end of the args in some (at least one anyway) | |
1232 | implementations, so strip it off if it exists. */ | |
70bccea4 | 1233 | |
25dbc73a | 1234 | { |
228e534f | 1235 | char *command = elf_tdata (abfd)->core->command; |
25dbc73a | 1236 | int n = strlen (command); |
70bccea4 | 1237 | |
25dbc73a AM |
1238 | if (0 < n && command[n - 1] == ' ') |
1239 | command[n - 1] = '\0'; | |
1240 | } | |
deaaf2f3 | 1241 | |
0a1b45a2 | 1242 | return true; |
25dbc73a | 1243 | } |
deaaf2f3 | 1244 | |
183e98be AM |
1245 | static char * |
1246 | ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) | |
1247 | { | |
1248 | switch (note_type) | |
1249 | { | |
1250 | default: | |
1251 | return NULL; | |
1252 | ||
1253 | case NT_PRPSINFO: | |
1254 | { | |
602f1657 | 1255 | char data[128] ATTRIBUTE_NONSTRING; |
183e98be AM |
1256 | va_list ap; |
1257 | ||
1258 | va_start (ap, note_type); | |
75cd47ed | 1259 | memset (data, 0, sizeof (data)); |
183e98be | 1260 | strncpy (data + 32, va_arg (ap, const char *), 16); |
be3e27bb | 1261 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
95da9854 | 1262 | DIAGNOSTIC_PUSH; |
be3e27bb | 1263 | /* GCC 8.0 and 8.1 warn about 80 equals destination size with |
95da9854 L |
1264 | -Wstringop-truncation: |
1265 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 | |
1266 | */ | |
95da9854 L |
1267 | DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; |
1268 | #endif | |
183e98be | 1269 | strncpy (data + 48, va_arg (ap, const char *), 80); |
be3e27bb | 1270 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
95da9854 | 1271 | DIAGNOSTIC_POP; |
fe75810f | 1272 | #endif |
183e98be AM |
1273 | va_end (ap); |
1274 | return elfcore_write_note (abfd, buf, bufsiz, | |
1275 | "CORE", note_type, data, sizeof (data)); | |
1276 | } | |
1277 | ||
1278 | case NT_PRSTATUS: | |
1279 | { | |
1280 | char data[268]; | |
1281 | va_list ap; | |
1282 | long pid; | |
1283 | int cursig; | |
1284 | const void *greg; | |
1285 | ||
1286 | va_start (ap, note_type); | |
1287 | memset (data, 0, 72); | |
1288 | pid = va_arg (ap, long); | |
1289 | bfd_put_32 (abfd, pid, data + 24); | |
1290 | cursig = va_arg (ap, int); | |
1291 | bfd_put_16 (abfd, cursig, data + 12); | |
1292 | greg = va_arg (ap, const void *); | |
1293 | memcpy (data + 72, greg, 192); | |
1294 | memset (data + 264, 0, 4); | |
1295 | va_end (ap); | |
1296 | return elfcore_write_note (abfd, buf, bufsiz, | |
1297 | "CORE", note_type, data, sizeof (data)); | |
1298 | } | |
1299 | } | |
1300 | } | |
1301 | ||
b9c361e0 | 1302 | static flagword |
68ffbac6 | 1303 | ppc_elf_lookup_section_flags (char *flag_name) |
b9c361e0 JL |
1304 | { |
1305 | ||
1306 | if (!strcmp (flag_name, "SHF_PPC_VLE")) | |
1307 | return SHF_PPC_VLE; | |
1308 | ||
1309 | return 0; | |
1310 | } | |
1311 | ||
25dbc73a AM |
1312 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
1313 | or (bfd_vma) -1 if it should not be included. */ | |
deaaf2f3 | 1314 | |
25dbc73a AM |
1315 | static bfd_vma |
1316 | ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, | |
1317 | const asection *plt ATTRIBUTE_UNUSED, | |
1318 | const arelent *rel) | |
1319 | { | |
1320 | return rel->address; | |
1321 | } | |
deaaf2f3 | 1322 | |
25dbc73a | 1323 | /* Handle a PowerPC specific section when reading an object file. This |
6dc132d9 L |
1324 | is called when bfd_section_from_shdr finds a section with an unknown |
1325 | type. */ | |
deaaf2f3 | 1326 | |
0a1b45a2 | 1327 | static bool |
6dc132d9 L |
1328 | ppc_elf_section_from_shdr (bfd *abfd, |
1329 | Elf_Internal_Shdr *hdr, | |
1330 | const char *name, | |
1331 | int shindex) | |
25dbc73a AM |
1332 | { |
1333 | asection *newsect; | |
1334 | flagword flags; | |
d1c6de6f | 1335 | |
6dc132d9 | 1336 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
0a1b45a2 | 1337 | return false; |
deaaf2f3 | 1338 | |
25dbc73a | 1339 | newsect = hdr->bfd_section; |
bf577467 | 1340 | flags = 0; |
25dbc73a AM |
1341 | if (hdr->sh_flags & SHF_EXCLUDE) |
1342 | flags |= SEC_EXCLUDE; | |
9abc968f | 1343 | |
25dbc73a AM |
1344 | if (hdr->sh_type == SHT_ORDERED) |
1345 | flags |= SEC_SORT_ENTRIES; | |
d1c6de6f | 1346 | |
3f3328b8 | 1347 | if (startswith (name, ".PPC.EMB")) |
bf577467 | 1348 | name += 8; |
3f3328b8 ML |
1349 | if (startswith (name, ".sbss") |
1350 | || startswith (name, ".sdata")) | |
bf577467 AM |
1351 | flags |= SEC_SMALL_DATA; |
1352 | ||
1353 | return (flags == 0 | |
1354 | || bfd_set_section_flags (newsect, newsect->flags | flags)); | |
25dbc73a AM |
1355 | } |
1356 | ||
1357 | /* Set up any other section flags and such that may be necessary. */ | |
1358 | ||
0a1b45a2 | 1359 | static bool |
25dbc73a AM |
1360 | ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
1361 | Elf_Internal_Shdr *shdr, | |
1362 | asection *asect) | |
1363 | { | |
25dbc73a AM |
1364 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
1365 | shdr->sh_type = SHT_ORDERED; | |
1366 | ||
0a1b45a2 | 1367 | return true; |
25dbc73a AM |
1368 | } |
1369 | ||
1370 | /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we | |
1371 | need to bump up the number of section headers. */ | |
1372 | ||
1373 | static int | |
a6b96beb AM |
1374 | ppc_elf_additional_program_headers (bfd *abfd, |
1375 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
25dbc73a AM |
1376 | { |
1377 | asection *s; | |
1378 | int ret = 0; | |
d1c6de6f | 1379 | |
25dbc73a AM |
1380 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
1381 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) | |
1382 | ++ret; | |
d1c6de6f | 1383 | |
25dbc73a AM |
1384 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
1385 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) | |
1386 | ++ret; | |
deaaf2f3 | 1387 | |
25dbc73a AM |
1388 | return ret; |
1389 | } | |
deaaf2f3 | 1390 | |
68ffbac6 | 1391 | /* Modify the segment map for VLE executables. */ |
b9c361e0 | 1392 | |
0a1b45a2 | 1393 | bool |
b9c361e0 JL |
1394 | ppc_elf_modify_segment_map (bfd *abfd, |
1395 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
1396 | { | |
f7d69005 | 1397 | struct elf_segment_map *m; |
b9c361e0 JL |
1398 | |
1399 | /* At this point in the link, output sections have already been sorted by | |
1400 | LMA and assigned to segments. All that is left to do is to ensure | |
1401 | there is no mixing of VLE & non-VLE sections in a text segment. | |
1402 | If we find that case, we split the segment. | |
1403 | We maintain the original output section order. */ | |
1404 | ||
12bd6957 | 1405 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) |
b9c361e0 | 1406 | { |
f7d69005 | 1407 | struct elf_segment_map *n; |
986f0783 | 1408 | size_t amt; |
f7d69005 AM |
1409 | unsigned int j, k; |
1410 | unsigned int p_flags; | |
1411 | ||
1412 | if (m->p_type != PT_LOAD || m->count == 0) | |
b9c361e0 JL |
1413 | continue; |
1414 | ||
f7d69005 | 1415 | for (p_flags = PF_R, j = 0; j != m->count; ++j) |
b9c361e0 | 1416 | { |
f7d69005 AM |
1417 | if ((m->sections[j]->flags & SEC_READONLY) == 0) |
1418 | p_flags |= PF_W; | |
1419 | if ((m->sections[j]->flags & SEC_CODE) != 0) | |
1420 | { | |
1421 | p_flags |= PF_X; | |
1422 | if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0) | |
1423 | p_flags |= PF_PPC_VLE; | |
1424 | break; | |
1425 | } | |
1426 | } | |
1427 | if (j != m->count) | |
1428 | while (++j != m->count) | |
1429 | { | |
1430 | unsigned int p_flags1 = PF_R; | |
94caa966 | 1431 | |
f7d69005 AM |
1432 | if ((m->sections[j]->flags & SEC_READONLY) == 0) |
1433 | p_flags1 |= PF_W; | |
1434 | if ((m->sections[j]->flags & SEC_CODE) != 0) | |
1435 | { | |
1436 | p_flags1 |= PF_X; | |
1437 | if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0) | |
1438 | p_flags1 |= PF_PPC_VLE; | |
1439 | if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0) | |
1440 | break; | |
1441 | } | |
1442 | p_flags |= p_flags1; | |
1443 | } | |
1444 | /* If we're splitting a segment which originally contained rw | |
1445 | sections then those sections might now only be in one of the | |
1446 | two parts. So always set p_flags if splitting, even if we | |
1447 | are being called for objcopy with p_flags_valid set. */ | |
1448 | if (j != m->count || !m->p_flags_valid) | |
1449 | { | |
1450 | m->p_flags_valid = 1; | |
1451 | m->p_flags = p_flags; | |
1452 | } | |
1453 | if (j == m->count) | |
b9c361e0 JL |
1454 | continue; |
1455 | ||
f7d69005 | 1456 | /* Sections 0..j-1 stay in this (current) segment, |
b9c361e0 JL |
1457 | the remainder are put in a new segment. |
1458 | The scan resumes with the new segment. */ | |
1459 | ||
b9c361e0 JL |
1460 | amt = sizeof (struct elf_segment_map); |
1461 | amt += (m->count - j - 1) * sizeof (asection *); | |
1462 | n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); | |
1463 | if (n == NULL) | |
0a1b45a2 | 1464 | return false; |
b9c361e0 JL |
1465 | |
1466 | n->p_type = PT_LOAD; | |
b9c361e0 JL |
1467 | n->count = m->count - j; |
1468 | for (k = 0; k < n->count; ++k) | |
f7d69005 AM |
1469 | n->sections[k] = m->sections[j + k]; |
1470 | m->count = j; | |
1471 | m->p_size_valid = 0; | |
b9c361e0 JL |
1472 | n->next = m->next; |
1473 | m->next = n; | |
b9c361e0 JL |
1474 | } |
1475 | ||
0a1b45a2 | 1476 | return true; |
b9c361e0 JL |
1477 | } |
1478 | ||
25dbc73a AM |
1479 | /* Add extra PPC sections -- Note, for now, make .sbss2 and |
1480 | .PPC.EMB.sbss0 a normal section, and not a bss section so | |
1481 | that the linker doesn't crater when trying to make more than | |
1482 | 2 sections. */ | |
e656e369 | 1483 | |
b35d266b | 1484 | static const struct bfd_elf_special_section ppc_elf_special_sections[] = |
7f4d3958 | 1485 | { |
14b57c7c AM |
1486 | { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, |
1487 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, | |
1488 | { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, | |
1489 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
1490 | { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, | |
1491 | { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, | |
1492 | { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 }, | |
1493 | { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, | |
1494 | { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, | |
1495 | { NULL, 0, 0, 0, 0 } | |
7f4d3958 L |
1496 | }; |
1497 | ||
551b43fd | 1498 | /* This is what we want for new plt/got. */ |
bd38246a | 1499 | static const struct bfd_elf_special_section ppc_alt_plt = |
07d6d2b8 | 1500 | { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; |
551b43fd AM |
1501 | |
1502 | static const struct bfd_elf_special_section * | |
4aef7643 | 1503 | ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec) |
7f4d3958 | 1504 | { |
b35d266b | 1505 | const struct bfd_elf_special_section *ssect; |
551b43fd AM |
1506 | |
1507 | /* See if this is one of the special sections. */ | |
1508 | if (sec->name == NULL) | |
1509 | return NULL; | |
1510 | ||
1511 | ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, | |
1512 | sec->use_rela_p); | |
1513 | if (ssect != NULL) | |
1514 | { | |
1515 | if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) | |
1516 | ssect = &ppc_alt_plt; | |
1517 | return ssect; | |
1518 | } | |
1519 | ||
1520 | return _bfd_elf_get_sec_type_attr (abfd, sec); | |
1521 | } | |
25dbc73a AM |
1522 | \f |
1523 | /* Very simple linked list structure for recording apuinfo values. */ | |
1524 | typedef struct apuinfo_list | |
1525 | { | |
1526 | struct apuinfo_list *next; | |
1527 | unsigned long value; | |
1528 | } | |
1529 | apuinfo_list; | |
e656e369 | 1530 | |
25dbc73a | 1531 | static apuinfo_list *head; |
0a1b45a2 | 1532 | static bool apuinfo_set; |
deaaf2f3 | 1533 | |
25dbc73a AM |
1534 | static void |
1535 | apuinfo_list_init (void) | |
1536 | { | |
1537 | head = NULL; | |
0a1b45a2 | 1538 | apuinfo_set = false; |
25dbc73a | 1539 | } |
9abc968f | 1540 | |
25dbc73a AM |
1541 | static void |
1542 | apuinfo_list_add (unsigned long value) | |
1543 | { | |
1544 | apuinfo_list *entry = head; | |
deaaf2f3 | 1545 | |
25dbc73a AM |
1546 | while (entry != NULL) |
1547 | { | |
1548 | if (entry->value == value) | |
1549 | return; | |
1550 | entry = entry->next; | |
1551 | } | |
b4a38de6 | 1552 | |
25dbc73a AM |
1553 | entry = bfd_malloc (sizeof (* entry)); |
1554 | if (entry == NULL) | |
1555 | return; | |
e656e369 | 1556 | |
25dbc73a AM |
1557 | entry->value = value; |
1558 | entry->next = head; | |
1559 | head = entry; | |
1560 | } | |
9abc968f | 1561 | |
25dbc73a AM |
1562 | static unsigned |
1563 | apuinfo_list_length (void) | |
1564 | { | |
1565 | apuinfo_list *entry; | |
1566 | unsigned long count; | |
9abc968f | 1567 | |
25dbc73a AM |
1568 | for (entry = head, count = 0; |
1569 | entry; | |
1570 | entry = entry->next) | |
1571 | ++ count; | |
e656e369 | 1572 | |
25dbc73a AM |
1573 | return count; |
1574 | } | |
eea6121a | 1575 | |
25dbc73a AM |
1576 | static inline unsigned long |
1577 | apuinfo_list_element (unsigned long number) | |
1578 | { | |
1579 | apuinfo_list * entry; | |
e656e369 | 1580 | |
25dbc73a AM |
1581 | for (entry = head; |
1582 | entry && number --; | |
1583 | entry = entry->next) | |
1584 | ; | |
252b5132 | 1585 | |
25dbc73a AM |
1586 | return entry ? entry->value : 0; |
1587 | } | |
1588 | ||
1589 | static void | |
1590 | apuinfo_list_finish (void) | |
1591 | { | |
1592 | apuinfo_list *entry; | |
1593 | ||
1594 | for (entry = head; entry;) | |
252b5132 | 1595 | { |
25dbc73a AM |
1596 | apuinfo_list *next = entry->next; |
1597 | free (entry); | |
1598 | entry = next; | |
1599 | } | |
9abc968f | 1600 | |
25dbc73a AM |
1601 | head = NULL; |
1602 | } | |
9abc968f | 1603 | |
25dbc73a AM |
1604 | /* Scan the input BFDs and create a linked list of |
1605 | the APUinfo values that will need to be emitted. */ | |
9abc968f | 1606 | |
25dbc73a AM |
1607 | static void |
1608 | ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) | |
1609 | { | |
1610 | bfd *ibfd; | |
1611 | asection *asec; | |
deddc40b NS |
1612 | char *buffer = NULL; |
1613 | bfd_size_type largest_input_size = 0; | |
25dbc73a | 1614 | unsigned i; |
25dbc73a AM |
1615 | unsigned long length; |
1616 | const char *error_message = NULL; | |
9abc968f | 1617 | |
25dbc73a AM |
1618 | if (link_info == NULL) |
1619 | return; | |
9abc968f | 1620 | |
25dbc73a | 1621 | apuinfo_list_init (); |
252b5132 | 1622 | |
25dbc73a | 1623 | /* Read in the input sections contents. */ |
c72f2fb2 | 1624 | for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next) |
252b5132 | 1625 | { |
25dbc73a | 1626 | unsigned long datum; |
252b5132 | 1627 | |
25dbc73a AM |
1628 | asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); |
1629 | if (asec == NULL) | |
1630 | continue; | |
252b5132 | 1631 | |
695344c0 | 1632 | /* xgettext:c-format */ |
871b3ab2 | 1633 | error_message = _("corrupt %s section in %pB"); |
25dbc73a | 1634 | length = asec->size; |
deddc40b NS |
1635 | if (length < 20) |
1636 | goto fail; | |
1637 | ||
0a1b45a2 | 1638 | apuinfo_set = true; |
deddc40b | 1639 | if (largest_input_size < asec->size) |
25dbc73a | 1640 | { |
c9594989 | 1641 | free (buffer); |
deddc40b NS |
1642 | largest_input_size = asec->size; |
1643 | buffer = bfd_malloc (largest_input_size); | |
1644 | if (!buffer) | |
1645 | return; | |
25dbc73a | 1646 | } |
5b914448 | 1647 | |
25dbc73a | 1648 | if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 |
deddc40b | 1649 | || (bfd_bread (buffer, length, ibfd) != length)) |
25dbc73a | 1650 | { |
695344c0 | 1651 | /* xgettext:c-format */ |
871b3ab2 | 1652 | error_message = _("unable to read in %s section from %pB"); |
25dbc73a AM |
1653 | goto fail; |
1654 | } | |
252b5132 | 1655 | |
25dbc73a AM |
1656 | /* Verify the contents of the header. Note - we have to |
1657 | extract the values this way in order to allow for a | |
1658 | host whose endian-ness is different from the target. */ | |
deddc40b | 1659 | datum = bfd_get_32 (ibfd, buffer); |
25dbc73a AM |
1660 | if (datum != sizeof APUINFO_LABEL) |
1661 | goto fail; | |
252b5132 | 1662 | |
deddc40b | 1663 | datum = bfd_get_32 (ibfd, buffer + 8); |
25dbc73a AM |
1664 | if (datum != 0x2) |
1665 | goto fail; | |
252b5132 | 1666 | |
deddc40b | 1667 | if (strcmp (buffer + 12, APUINFO_LABEL) != 0) |
25dbc73a | 1668 | goto fail; |
252b5132 | 1669 | |
25dbc73a | 1670 | /* Get the number of bytes used for apuinfo entries. */ |
deddc40b | 1671 | datum = bfd_get_32 (ibfd, buffer + 4); |
25dbc73a AM |
1672 | if (datum + 20 != length) |
1673 | goto fail; | |
1674 | ||
25dbc73a AM |
1675 | /* Scan the apuinfo section, building a list of apuinfo numbers. */ |
1676 | for (i = 0; i < datum; i += 4) | |
deddc40b | 1677 | apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); |
252b5132 RH |
1678 | } |
1679 | ||
25dbc73a | 1680 | error_message = NULL; |
252b5132 | 1681 | |
f2faa800 | 1682 | if (apuinfo_set) |
deddc40b | 1683 | { |
f2faa800 NS |
1684 | /* Compute the size of the output section. */ |
1685 | unsigned num_entries = apuinfo_list_length (); | |
5b914448 | 1686 | |
deddc40b NS |
1687 | /* Set the output section size, if it exists. */ |
1688 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); | |
f2faa800 | 1689 | |
fd361982 | 1690 | if (asec && !bfd_set_section_size (asec, 20 + num_entries * 4)) |
deddc40b NS |
1691 | { |
1692 | ibfd = abfd; | |
695344c0 | 1693 | /* xgettext:c-format */ |
871b3ab2 | 1694 | error_message = _("warning: unable to set size of %s section in %pB"); |
deddc40b NS |
1695 | } |
1696 | } | |
25dbc73a AM |
1697 | |
1698 | fail: | |
c9594989 | 1699 | free (buffer); |
25dbc73a AM |
1700 | |
1701 | if (error_message) | |
cd9af601 | 1702 | _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd); |
25dbc73a | 1703 | } |
252b5132 | 1704 | |
25dbc73a AM |
1705 | /* Prevent the output section from accumulating the input sections' |
1706 | contents. We have already stored this in our linked list structure. */ | |
252b5132 | 1707 | |
0a1b45a2 | 1708 | static bool |
25dbc73a | 1709 | ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, |
c7b8f16e | 1710 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED, |
25dbc73a AM |
1711 | asection *asec, |
1712 | bfd_byte *contents ATTRIBUTE_UNUSED) | |
1713 | { | |
f2faa800 | 1714 | return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; |
252b5132 RH |
1715 | } |
1716 | ||
25dbc73a AM |
1717 | /* Finally we can generate the output section. */ |
1718 | ||
1719 | static void | |
cc364be6 | 1720 | ppc_final_write_processing (bfd *abfd) |
7619e7c7 | 1721 | { |
25dbc73a AM |
1722 | bfd_byte *buffer; |
1723 | asection *asec; | |
1724 | unsigned i; | |
1725 | unsigned num_entries; | |
1726 | bfd_size_type length; | |
7619e7c7 | 1727 | |
25dbc73a AM |
1728 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
1729 | if (asec == NULL) | |
1730 | return; | |
1731 | ||
f2faa800 | 1732 | if (!apuinfo_set) |
25dbc73a AM |
1733 | return; |
1734 | ||
1735 | length = asec->size; | |
1736 | if (length < 20) | |
1737 | return; | |
1738 | ||
1739 | buffer = bfd_malloc (length); | |
1740 | if (buffer == NULL) | |
7619e7c7 | 1741 | { |
4eca0228 | 1742 | _bfd_error_handler |
cf97bcb0 | 1743 | (_("failed to allocate space for new APUinfo section")); |
25dbc73a | 1744 | return; |
7619e7c7 | 1745 | } |
7619e7c7 | 1746 | |
25dbc73a AM |
1747 | /* Create the apuinfo header. */ |
1748 | num_entries = apuinfo_list_length (); | |
1749 | bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); | |
1750 | bfd_put_32 (abfd, num_entries * 4, buffer + 4); | |
1751 | bfd_put_32 (abfd, 0x2, buffer + 8); | |
1752 | strcpy ((char *) buffer + 12, APUINFO_LABEL); | |
feee612b | 1753 | |
25dbc73a AM |
1754 | length = 20; |
1755 | for (i = 0; i < num_entries; i++) | |
feee612b | 1756 | { |
25dbc73a AM |
1757 | bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); |
1758 | length += 4; | |
feee612b | 1759 | } |
feee612b | 1760 | |
25dbc73a | 1761 | if (length != asec->size) |
cf97bcb0 | 1762 | _bfd_error_handler (_("failed to compute new APUinfo section")); |
252b5132 | 1763 | |
25dbc73a | 1764 | if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) |
cf97bcb0 | 1765 | _bfd_error_handler (_("failed to install new APUinfo section")); |
252b5132 | 1766 | |
25dbc73a AM |
1767 | free (buffer); |
1768 | ||
1769 | apuinfo_list_finish (); | |
252b5132 | 1770 | } |
06f44071 | 1771 | |
0a1b45a2 | 1772 | static bool |
cc364be6 | 1773 | ppc_elf_final_write_processing (bfd *abfd) |
06f44071 | 1774 | { |
cc364be6 AM |
1775 | ppc_final_write_processing (abfd); |
1776 | return _bfd_elf_final_write_processing (abfd); | |
06f44071 | 1777 | } |
25dbc73a | 1778 | \f |
0a1b45a2 | 1779 | static bool |
c6dd29ce | 1780 | is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) |
7382d32a | 1781 | { |
407aa07c | 1782 | bfd_byte buf[4 * 4]; |
7382d32a | 1783 | |
9e390558 | 1784 | if (!bfd_get_section_contents (abfd, glink, buf, off, sizeof buf)) |
0a1b45a2 | 1785 | return false; |
7382d32a | 1786 | |
c6dd29ce AM |
1787 | return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 |
1788 | && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 | |
407aa07c AM |
1789 | && bfd_get_32 (abfd, buf + 8) == MTCTR_11 |
1790 | && bfd_get_32 (abfd, buf + 12) == BCTR); | |
7382d32a AM |
1791 | } |
1792 | ||
0a1b45a2 | 1793 | static bool |
468392fb AM |
1794 | section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) |
1795 | { | |
1796 | bfd_vma vma = *(bfd_vma *) ptr; | |
1797 | return ((section->flags & SEC_ALLOC) != 0 | |
1798 | && section->vma <= vma | |
1799 | && vma < section->vma + section->size); | |
1800 | } | |
1801 | ||
1802 | static long | |
1803 | ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, | |
1804 | long dynsymcount, asymbol **dynsyms, | |
1805 | asymbol **ret) | |
1806 | { | |
0a1b45a2 | 1807 | bool (*slurp_relocs) (bfd *, asection *, asymbol **, bool); |
468392fb AM |
1808 | asection *plt, *relplt, *dynamic, *glink; |
1809 | bfd_vma glink_vma = 0; | |
1810 | bfd_vma resolv_vma = 0; | |
9e390558 | 1811 | bfd_vma stub_off; |
468392fb AM |
1812 | asymbol *s; |
1813 | arelent *p; | |
9ad9b810 | 1814 | size_t count, i, stub_delta; |
468392fb AM |
1815 | size_t size; |
1816 | char *names; | |
1817 | bfd_byte buf[4]; | |
1818 | ||
1819 | *ret = NULL; | |
1820 | ||
1821 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) | |
1822 | return 0; | |
1823 | ||
1824 | if (dynsymcount <= 0) | |
1825 | return 0; | |
1826 | ||
1827 | relplt = bfd_get_section_by_name (abfd, ".rela.plt"); | |
1828 | if (relplt == NULL) | |
1829 | return 0; | |
1830 | ||
1831 | plt = bfd_get_section_by_name (abfd, ".plt"); | |
1832 | if (plt == NULL) | |
1833 | return 0; | |
1834 | ||
1835 | /* Call common code to handle old-style executable PLTs. */ | |
1836 | if (elf_section_flags (plt) & SHF_EXECINSTR) | |
1837 | return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, | |
1838 | dynsymcount, dynsyms, ret); | |
1839 | ||
1840 | /* If this object was prelinked, the prelinker stored the address | |
1841 | of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ | |
1842 | dynamic = bfd_get_section_by_name (abfd, ".dynamic"); | |
1843 | if (dynamic != NULL) | |
1844 | { | |
1845 | bfd_byte *dynbuf, *extdyn, *extdynend; | |
1846 | size_t extdynsize; | |
1847 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
1848 | ||
1849 | if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) | |
1850 | return -1; | |
1851 | ||
1852 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; | |
1853 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
1854 | ||
37c59664 AM |
1855 | for (extdyn = dynbuf, extdynend = dynbuf + dynamic->size; |
1856 | (size_t) (extdynend - extdyn) >= extdynsize; | |
1857 | extdyn += extdynsize) | |
468392fb AM |
1858 | { |
1859 | Elf_Internal_Dyn dyn; | |
1860 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
1861 | ||
1862 | if (dyn.d_tag == DT_NULL) | |
1863 | break; | |
1864 | ||
1865 | if (dyn.d_tag == DT_PPC_GOT) | |
1866 | { | |
1867 | unsigned int g_o_t = dyn.d_un.d_val; | |
1868 | asection *got = bfd_get_section_by_name (abfd, ".got"); | |
1869 | if (got != NULL | |
1870 | && bfd_get_section_contents (abfd, got, buf, | |
1871 | g_o_t - got->vma + 4, 4)) | |
1872 | glink_vma = bfd_get_32 (abfd, buf); | |
1873 | break; | |
1874 | } | |
1875 | } | |
1876 | free (dynbuf); | |
1877 | } | |
1878 | ||
1879 | /* Otherwise we read the first plt entry. */ | |
1880 | if (glink_vma == 0) | |
1881 | { | |
1882 | if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) | |
1883 | glink_vma = bfd_get_32 (abfd, buf); | |
1884 | } | |
1885 | ||
1886 | if (glink_vma == 0) | |
1887 | return 0; | |
1888 | ||
1889 | /* The .glink section usually does not survive the final | |
1890 | link; search for the section (usually .text) where the | |
1891 | glink stubs now reside. */ | |
1892 | glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); | |
1893 | if (glink == NULL) | |
1894 | return 0; | |
1895 | ||
1896 | /* Determine glink PLT resolver by reading the relative branch | |
1897 | from the first glink stub. */ | |
1898 | if (bfd_get_section_contents (abfd, glink, buf, | |
1899 | glink_vma - glink->vma, 4)) | |
1900 | { | |
1901 | unsigned int insn = bfd_get_32 (abfd, buf); | |
1902 | ||
1903 | /* The first glink stub may either branch to the resolver ... */ | |
1904 | insn ^= B; | |
1905 | if ((insn & ~0x3fffffc) == 0) | |
1906 | resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; | |
1907 | ||
1908 | /* ... or fall through a bunch of NOPs. */ | |
1909 | else if ((insn ^ B ^ NOP) == 0) | |
1910 | for (i = 4; | |
1911 | bfd_get_section_contents (abfd, glink, buf, | |
1912 | glink_vma - glink->vma + i, 4); | |
1913 | i += 4) | |
1914 | if (bfd_get_32 (abfd, buf) != NOP) | |
1915 | { | |
1916 | resolv_vma = glink_vma + i; | |
1917 | break; | |
1918 | } | |
1919 | } | |
1920 | ||
7382d32a | 1921 | count = relplt->size / sizeof (Elf32_External_Rela); |
7382d32a AM |
1922 | /* If the stubs are those for -shared/-pie then we might have |
1923 | multiple stubs for each plt entry. If that is the case then | |
1924 | there is no way to associate stubs with their plt entries short | |
9e390558 AM |
1925 | of figuring out the GOT pointer value used in the stub. |
1926 | The offsets tested here need to cover all possible values of | |
1927 | GLINK_ENTRY_SIZE for other than __tls_get_addr_opt. */ | |
1928 | stub_off = glink_vma - glink->vma; | |
1929 | for (stub_delta = 16; stub_delta <= 32; stub_delta += 8) | |
1930 | if (is_nonpic_glink_stub (abfd, glink, stub_off - stub_delta)) | |
1931 | break; | |
1932 | if (stub_delta > 32) | |
7382d32a AM |
1933 | return 0; |
1934 | ||
468392fb | 1935 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
0a1b45a2 | 1936 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, true)) |
468392fb AM |
1937 | return -1; |
1938 | ||
468392fb AM |
1939 | size = count * sizeof (asymbol); |
1940 | p = relplt->relocation; | |
1941 | for (i = 0; i < count; i++, p++) | |
e054468f AM |
1942 | { |
1943 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); | |
1944 | if (p->addend != 0) | |
1945 | size += sizeof ("+0x") - 1 + 8; | |
1946 | } | |
468392fb AM |
1947 | |
1948 | size += sizeof (asymbol) + sizeof ("__glink"); | |
1949 | ||
1950 | if (resolv_vma) | |
1951 | size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); | |
1952 | ||
1953 | s = *ret = bfd_malloc (size); | |
1954 | if (s == NULL) | |
1955 | return -1; | |
1956 | ||
9e390558 | 1957 | stub_off = glink_vma - glink->vma; |
468392fb | 1958 | names = (char *) (s + count + 1 + (resolv_vma != 0)); |
1079403c AM |
1959 | p = relplt->relocation + count - 1; |
1960 | for (i = 0; i < count; i++) | |
468392fb AM |
1961 | { |
1962 | size_t len; | |
1963 | ||
9e390558 AM |
1964 | stub_off -= stub_delta; |
1965 | if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0) | |
1966 | stub_off -= 32; | |
468392fb AM |
1967 | *s = **p->sym_ptr_ptr; |
1968 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since | |
1969 | we are defining a symbol, ensure one of them is set. */ | |
1970 | if ((s->flags & BSF_LOCAL) == 0) | |
1971 | s->flags |= BSF_GLOBAL; | |
6ba2a415 | 1972 | s->flags |= BSF_SYNTHETIC; |
468392fb | 1973 | s->section = glink; |
9e390558 | 1974 | s->value = stub_off; |
468392fb AM |
1975 | s->name = names; |
1976 | s->udata.p = NULL; | |
1977 | len = strlen ((*p->sym_ptr_ptr)->name); | |
1978 | memcpy (names, (*p->sym_ptr_ptr)->name, len); | |
1979 | names += len; | |
e054468f AM |
1980 | if (p->addend != 0) |
1981 | { | |
1982 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
1983 | names += sizeof ("+0x") - 1; | |
1984 | bfd_sprintf_vma (abfd, names, p->addend); | |
1985 | names += strlen (names); | |
1986 | } | |
468392fb AM |
1987 | memcpy (names, "@plt", sizeof ("@plt")); |
1988 | names += sizeof ("@plt"); | |
1989 | ++s; | |
1079403c | 1990 | --p; |
468392fb AM |
1991 | } |
1992 | ||
1993 | /* Add a symbol at the start of the glink branch table. */ | |
86a4952b | 1994 | memset (s, 0, sizeof *s); |
468392fb | 1995 | s->the_bfd = abfd; |
6ba2a415 | 1996 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
468392fb AM |
1997 | s->section = glink; |
1998 | s->value = glink_vma - glink->vma; | |
1999 | s->name = names; | |
2000 | memcpy (names, "__glink", sizeof ("__glink")); | |
2001 | names += sizeof ("__glink"); | |
2002 | s++; | |
2003 | count++; | |
2004 | ||
2005 | if (resolv_vma) | |
2006 | { | |
2007 | /* Add a symbol for the glink PLT resolver. */ | |
86a4952b | 2008 | memset (s, 0, sizeof *s); |
468392fb | 2009 | s->the_bfd = abfd; |
6ba2a415 | 2010 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
468392fb AM |
2011 | s->section = glink; |
2012 | s->value = resolv_vma - glink->vma; | |
2013 | s->name = names; | |
2014 | memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); | |
2015 | names += sizeof ("__glink_PLTresolve"); | |
2016 | s++; | |
2017 | count++; | |
2018 | } | |
2019 | ||
2020 | return count; | |
2021 | } | |
2022 | \f | |
25dbc73a AM |
2023 | /* The following functions are specific to the ELF linker, while |
2024 | functions above are used generally. They appear in this file more | |
2025 | or less in the order in which they are called. eg. | |
2026 | ppc_elf_check_relocs is called early in the link process, | |
2027 | ppc_elf_finish_dynamic_sections is one of the last functions | |
2028 | called. */ | |
252b5132 | 2029 | |
a6aa5195 | 2030 | /* Track PLT entries needed for a given symbol. We might need more |
a877a2b6 | 2031 | than one glink entry per symbol when generating a pic binary. */ |
a6aa5195 AM |
2032 | struct plt_entry |
2033 | { | |
2034 | struct plt_entry *next; | |
2035 | ||
2036 | /* -fPIC uses multiple GOT sections, one per file, called ".got2". | |
2037 | This field stores the offset into .got2 used to initialise the | |
a877a2b6 AM |
2038 | GOT pointer reg. It will always be at least 32768. (Current |
2039 | gcc always uses an offset of 32768, but ld -r will pack .got2 | |
2040 | sections together resulting in larger offsets). */ | |
a6aa5195 AM |
2041 | bfd_vma addend; |
2042 | ||
2043 | /* The .got2 section. */ | |
2044 | asection *sec; | |
2045 | ||
2046 | /* PLT refcount or offset. */ | |
2047 | union | |
2048 | { | |
2049 | bfd_signed_vma refcount; | |
2050 | bfd_vma offset; | |
2051 | } plt; | |
2052 | ||
2053 | /* .glink stub offset. */ | |
2054 | bfd_vma glink_offset; | |
2055 | }; | |
2056 | ||
7c8bbca5 AM |
2057 | /* Of those relocs that might be copied as dynamic relocs, this |
2058 | function selects those that must be copied when linking a shared | |
2059 | library or PIE, even when the symbol is local. */ | |
252b5132 | 2060 | |
1d483afe AM |
2061 | static int |
2062 | must_be_dyn_reloc (struct bfd_link_info *info, | |
2063 | enum elf_ppc_reloc_type r_type) | |
2064 | { | |
2065 | switch (r_type) | |
2066 | { | |
2067 | default: | |
7c8bbca5 AM |
2068 | /* Only relative relocs can be resolved when the object load |
2069 | address isn't fixed. DTPREL32 is excluded because the | |
2070 | dynamic linker needs to differentiate global dynamic from | |
2071 | local dynamic __tls_index pairs when PPC_OPT_TLS is set. */ | |
1d483afe AM |
2072 | return 1; |
2073 | ||
2074 | case R_PPC_REL24: | |
2075 | case R_PPC_REL14: | |
2076 | case R_PPC_REL14_BRTAKEN: | |
2077 | case R_PPC_REL14_BRNTAKEN: | |
2078 | case R_PPC_REL32: | |
2079 | return 0; | |
2080 | ||
2081 | case R_PPC_TPREL32: | |
2082 | case R_PPC_TPREL16: | |
2083 | case R_PPC_TPREL16_LO: | |
2084 | case R_PPC_TPREL16_HI: | |
2085 | case R_PPC_TPREL16_HA: | |
7c8bbca5 AM |
2086 | /* These relocations are relative but in a shared library the |
2087 | linker doesn't know the thread pointer base. */ | |
2088 | return bfd_link_dll (info); | |
1d483afe AM |
2089 | } |
2090 | } | |
252b5132 | 2091 | |
25dbc73a AM |
2092 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
2093 | copying dynamic variables from a shared lib into an app's dynbss | |
2094 | section, and instead use a dynamic relocation to point into the | |
2095 | shared lib. */ | |
2096 | #define ELIMINATE_COPY_RELOCS 1 | |
252b5132 | 2097 | |
f95f8542 AM |
2098 | /* Used to track dynamic relocations for local symbols. */ |
2099 | struct ppc_dyn_relocs | |
2100 | { | |
2101 | struct ppc_dyn_relocs *next; | |
2102 | ||
2103 | /* The input section of the reloc. */ | |
2104 | asection *sec; | |
2105 | ||
2106 | /* Total number of relocs copied for the input section. */ | |
2107 | unsigned int count : 31; | |
2108 | ||
2109 | /* Whether this entry is for STT_GNU_IFUNC symbols. */ | |
2110 | unsigned int ifunc : 1; | |
2111 | }; | |
2112 | ||
25dbc73a | 2113 | /* PPC ELF linker hash entry. */ |
252b5132 | 2114 | |
25dbc73a AM |
2115 | struct ppc_elf_link_hash_entry |
2116 | { | |
2117 | struct elf_link_hash_entry elf; | |
252b5132 | 2118 | |
25dbc73a AM |
2119 | /* If this symbol is used in the linker created sections, the processor |
2120 | specific backend uses this field to map the field into the offset | |
2121 | from the beginning of the section. */ | |
2122 | elf_linker_section_pointers_t *linker_section_pointer; | |
252b5132 | 2123 | |
37da22e5 AM |
2124 | /* Contexts in which symbol is used in the GOT. |
2125 | Bits are or'd into the mask as the corresponding relocs are | |
2126 | encountered during check_relocs, with TLS_TLS being set when any | |
2127 | of the other TLS bits are set. tls_optimize clears bits when | |
2128 | optimizing to indicate the corresponding GOT entry type is not | |
2129 | needed. If set, TLS_TLS is never cleared. tls_optimize may also | |
b00a0a86 | 2130 | set TLS_GDIE when a GD reloc turns into an IE one. |
37da22e5 AM |
2131 | These flags are also kept for local symbols. */ |
2132 | #define TLS_TLS 1 /* Any TLS reloc. */ | |
2133 | #define TLS_GD 2 /* GD reloc. */ | |
2134 | #define TLS_LD 4 /* LD reloc. */ | |
2135 | #define TLS_TPREL 8 /* TPREL reloc, => IE. */ | |
2136 | #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */ | |
2137 | #define TLS_MARK 32 /* __tls_get_addr call marked. */ | |
b00a0a86 | 2138 | #define TLS_GDIE 64 /* GOT TPREL reloc resulting from GD->IE. */ |
bac3c8c5 | 2139 | unsigned char tls_mask; |
4dc4a9a5 | 2140 | |
37da22e5 AM |
2141 | /* The above field is also used to mark function symbols. In which |
2142 | case TLS_TLS will be 0. */ | |
2143 | #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */ | |
2d7ad24e | 2144 | #define PLT_KEEP 4 /* inline plt call requires plt entry. */ |
37da22e5 AM |
2145 | #define NON_GOT 256 /* local symbol plt, not stored. */ |
2146 | ||
4dc4a9a5 DJ |
2147 | /* Nonzero if we have seen a small data relocation referring to this |
2148 | symbol. */ | |
d3e454b9 AM |
2149 | unsigned char has_sda_refs : 1; |
2150 | ||
2151 | /* Flag use of given relocations. */ | |
2152 | unsigned char has_addr16_ha : 1; | |
2153 | unsigned char has_addr16_lo : 1; | |
25dbc73a | 2154 | }; |
252b5132 | 2155 | |
25dbc73a AM |
2156 | #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) |
2157 | ||
2158 | /* PPC ELF linker hash table. */ | |
2159 | ||
2160 | struct ppc_elf_link_hash_table | |
2161 | { | |
2162 | struct elf_link_hash_table elf; | |
2163 | ||
5446cbdf AM |
2164 | /* Various options passed from the linker. */ |
2165 | struct ppc_elf_params *params; | |
2166 | ||
25dbc73a | 2167 | /* Short-cuts to get to dynamic linker sections. */ |
d7128ce4 | 2168 | asection *glink; |
25dbc73a AM |
2169 | asection *dynsbss; |
2170 | asection *relsbss; | |
c9a2f333 | 2171 | elf_linker_section_t sdata[2]; |
25dbc73a | 2172 | asection *sbss; |
6177242a | 2173 | asection *glink_eh_frame; |
2d7ad24e AM |
2174 | asection *pltlocal; |
2175 | asection *relpltlocal; | |
25dbc73a | 2176 | |
016687f8 AM |
2177 | /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ |
2178 | asection *srelplt2; | |
2179 | ||
1d483afe | 2180 | /* Shortcut to __tls_get_addr. */ |
25dbc73a | 2181 | struct elf_link_hash_entry *tls_get_addr; |
252b5132 | 2182 | |
016687f8 AM |
2183 | /* The bfd that forced an old-style PLT. */ |
2184 | bfd *old_bfd; | |
5b914448 | 2185 | |
25dbc73a AM |
2186 | /* TLS local dynamic got entry handling. */ |
2187 | union { | |
2188 | bfd_signed_vma refcount; | |
2189 | bfd_vma offset; | |
2190 | } tlsld_got; | |
252b5132 | 2191 | |
c6dd29ce | 2192 | /* Offset of branch table to PltResolve function in glink. */ |
d7128ce4 AM |
2193 | bfd_vma glink_pltresolve; |
2194 | ||
3b36f7e6 AM |
2195 | /* Size of reserved GOT entries. */ |
2196 | unsigned int got_header_size; | |
2197 | /* Non-zero if allocating the header left a gap. */ | |
2198 | unsigned int got_gap; | |
2199 | ||
4a3dc543 RS |
2200 | /* The type of PLT we have chosen to use. */ |
2201 | enum ppc_elf_plt_type plt_type; | |
2202 | ||
82e66161 AM |
2203 | /* Whether there exist local gnu indirect function resolvers, |
2204 | referenced by dynamic relocations. */ | |
2205 | unsigned int local_ifunc_resolver:1; | |
2206 | unsigned int maybe_local_ifunc_resolver:1; | |
2207 | ||
9a23f96e AM |
2208 | /* Set if tls optimization is enabled. */ |
2209 | unsigned int do_tls_opt:1; | |
2210 | ||
3e04d765 AM |
2211 | /* Set if inline plt calls should be converted to direct calls. */ |
2212 | unsigned int can_convert_all_inline_plt:1; | |
2213 | ||
9d8504b1 PB |
2214 | /* The size of PLT entries. */ |
2215 | int plt_entry_size; | |
2216 | /* The distance between adjacent PLT slots. */ | |
2217 | int plt_slot_size; | |
2218 | /* The size of the first PLT entry. */ | |
2219 | int plt_initial_entry_size; | |
25dbc73a | 2220 | }; |
252b5132 | 2221 | |
94caa966 AM |
2222 | /* Rename some of the generic section flags to better document how they |
2223 | are used for ppc32. The flags are only valid for ppc32 elf objects. */ | |
2224 | ||
2225 | /* Nonzero if this section has TLS related relocations. */ | |
2226 | #define has_tls_reloc sec_flg0 | |
2227 | ||
9737e8af AM |
2228 | /* Nonzero if this section has a call to __tls_get_addr lacking marker |
2229 | relocs. */ | |
2230 | #define nomark_tls_get_addr sec_flg1 | |
94caa966 | 2231 | |
3e04d765 AM |
2232 | /* Flag set when PLTCALL relocs are detected. */ |
2233 | #define has_pltcall sec_flg2 | |
2234 | ||
25dbc73a | 2235 | /* Get the PPC ELF linker hash table from a link_info structure. */ |
252b5132 | 2236 | |
25dbc73a | 2237 | #define ppc_elf_hash_table(p) \ |
a8d549c0 AM |
2238 | ((is_elf_hash_table ((p)->hash) \ |
2239 | && elf_hash_table_id (elf_hash_table (p)) == PPC32_ELF_DATA) \ | |
2240 | ? (struct ppc_elf_link_hash_table *) (p)->hash : NULL) | |
252b5132 | 2241 | |
25dbc73a | 2242 | /* Create an entry in a PPC ELF linker hash table. */ |
252b5132 | 2243 | |
25dbc73a AM |
2244 | static struct bfd_hash_entry * |
2245 | ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
2246 | struct bfd_hash_table *table, | |
2247 | const char *string) | |
252b5132 | 2248 | { |
25dbc73a AM |
2249 | /* Allocate the structure if it has not already been allocated by a |
2250 | subclass. */ | |
2251 | if (entry == NULL) | |
2252 | { | |
2253 | entry = bfd_hash_allocate (table, | |
2254 | sizeof (struct ppc_elf_link_hash_entry)); | |
2255 | if (entry == NULL) | |
2256 | return entry; | |
2257 | } | |
252b5132 | 2258 | |
25dbc73a AM |
2259 | /* Call the allocation method of the superclass. */ |
2260 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
2261 | if (entry != NULL) | |
2262 | { | |
2263 | ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; | |
25dbc73a | 2264 | ppc_elf_hash_entry (entry)->tls_mask = 0; |
5240d94d | 2265 | ppc_elf_hash_entry (entry)->has_sda_refs = 0; |
25dbc73a | 2266 | } |
252b5132 | 2267 | |
25dbc73a | 2268 | return entry; |
252b5132 | 2269 | } |
3dab13f6 | 2270 | |
25dbc73a | 2271 | /* Create a PPC ELF linker hash table. */ |
3dab13f6 | 2272 | |
25dbc73a AM |
2273 | static struct bfd_link_hash_table * |
2274 | ppc_elf_link_hash_table_create (bfd *abfd) | |
3dab13f6 | 2275 | { |
25dbc73a | 2276 | struct ppc_elf_link_hash_table *ret; |
76e7a751 | 2277 | static struct ppc_elf_params default_params |
407aa07c | 2278 | = { PLT_OLD, 0, 0, 1, 0, 0, 12, 0, 0, 0 }; |
3dab13f6 | 2279 | |
25dbc73a AM |
2280 | ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); |
2281 | if (ret == NULL) | |
2282 | return NULL; | |
3dab13f6 | 2283 | |
66eb6687 AM |
2284 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
2285 | ppc_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
2286 | sizeof (struct ppc_elf_link_hash_entry), |
2287 | PPC32_ELF_DATA)) | |
3dab13f6 | 2288 | { |
25dbc73a AM |
2289 | free (ret); |
2290 | return NULL; | |
2291 | } | |
58111eb7 | 2292 | |
a6aa5195 AM |
2293 | ret->elf.init_plt_refcount.refcount = 0; |
2294 | ret->elf.init_plt_refcount.glist = NULL; | |
2295 | ret->elf.init_plt_offset.offset = 0; | |
2296 | ret->elf.init_plt_offset.glist = NULL; | |
2297 | ||
db434ba0 AM |
2298 | ret->params = &default_params; |
2299 | ||
c9a2f333 AM |
2300 | ret->sdata[0].name = ".sdata"; |
2301 | ret->sdata[0].sym_name = "_SDA_BASE_"; | |
2302 | ret->sdata[0].bss_name = ".sbss"; | |
2303 | ||
2304 | ret->sdata[1].name = ".sdata2"; | |
2305 | ret->sdata[1].sym_name = "_SDA2_BASE_"; | |
2306 | ret->sdata[1].bss_name = ".sbss2"; | |
2307 | ||
9d8504b1 PB |
2308 | ret->plt_entry_size = 12; |
2309 | ret->plt_slot_size = 8; | |
2310 | ret->plt_initial_entry_size = 72; | |
9d8504b1 | 2311 | |
25dbc73a AM |
2312 | return &ret->elf.root; |
2313 | } | |
3dab13f6 | 2314 | |
5446cbdf AM |
2315 | /* Hook linker params into hash table. */ |
2316 | ||
2317 | void | |
2318 | ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params) | |
2319 | { | |
2320 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); | |
2321 | ||
2322 | if (htab) | |
2323 | htab->params = params; | |
76e7a751 | 2324 | params->pagesize_p2 = bfd_log2 (params->pagesize); |
5446cbdf AM |
2325 | } |
2326 | ||
9d8504b1 | 2327 | /* Create .got and the related sections. */ |
3dab13f6 | 2328 | |
0a1b45a2 | 2329 | static bool |
25dbc73a AM |
2330 | ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) |
2331 | { | |
2332 | struct ppc_elf_link_hash_table *htab; | |
3dab13f6 | 2333 | |
25dbc73a | 2334 | if (!_bfd_elf_create_got_section (abfd, info)) |
0a1b45a2 | 2335 | return false; |
3dab13f6 | 2336 | |
25dbc73a | 2337 | htab = ppc_elf_hash_table (info); |
90c14f0c | 2338 | if (htab->elf.target_os != is_vxworks) |
9d8504b1 PB |
2339 | { |
2340 | /* The powerpc .got has a blrl instruction in it. Mark it | |
2341 | executable. */ | |
ce558b89 AM |
2342 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS |
2343 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
fd361982 | 2344 | if (!bfd_set_section_flags (htab->elf.sgot, flags)) |
0a1b45a2 | 2345 | return false; |
9d8504b1 | 2346 | } |
3dab13f6 | 2347 | |
0a1b45a2 | 2348 | return true; |
25dbc73a | 2349 | } |
3dab13f6 | 2350 | |
93d1b056 AM |
2351 | /* Create a special linker section, used for R_PPC_EMB_SDAI16 and |
2352 | R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata | |
2353 | and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */ | |
2354 | ||
0a1b45a2 | 2355 | static bool |
93d1b056 AM |
2356 | ppc_elf_create_linker_section (bfd *abfd, |
2357 | struct bfd_link_info *info, | |
2358 | flagword flags, | |
2359 | elf_linker_section_t *lsect) | |
2360 | { | |
2361 | asection *s; | |
2362 | ||
2363 | flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
2364 | | SEC_LINKER_CREATED); | |
2365 | ||
2366 | s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags); | |
2367 | if (s == NULL) | |
0a1b45a2 | 2368 | return false; |
93d1b056 AM |
2369 | lsect->section = s; |
2370 | ||
2371 | /* Define the sym on the first section of this name. */ | |
2372 | s = bfd_get_section_by_name (abfd, lsect->name); | |
2373 | ||
2374 | lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name); | |
2375 | if (lsect->sym == NULL) | |
0a1b45a2 | 2376 | return false; |
93d1b056 | 2377 | lsect->sym->root.u.def.value = 0x8000; |
0a1b45a2 | 2378 | return true; |
93d1b056 AM |
2379 | } |
2380 | ||
0a1b45a2 | 2381 | static bool |
e054468f AM |
2382 | ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) |
2383 | { | |
2384 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); | |
2385 | asection *s; | |
2386 | flagword flags; | |
691d2e9a | 2387 | int p2align; |
e054468f AM |
2388 | |
2389 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS | |
2390 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2391 | s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); | |
2392 | htab->glink = s; | |
691d2e9a AM |
2393 | p2align = htab->params->ppc476_workaround ? 6 : 4; |
2394 | if (p2align < htab->params->plt_stub_align) | |
2395 | p2align = htab->params->plt_stub_align; | |
e054468f | 2396 | if (s == NULL |
fd361982 | 2397 | || !bfd_set_section_alignment (s, p2align)) |
0a1b45a2 | 2398 | return false; |
e054468f | 2399 | |
6177242a AM |
2400 | if (!info->no_ld_generated_unwind_info) |
2401 | { | |
2402 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | |
2403 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2404 | s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); | |
2405 | htab->glink_eh_frame = s; | |
2406 | if (s == NULL | |
fd361982 | 2407 | || !bfd_set_section_alignment (s, 2)) |
0a1b45a2 | 2408 | return false; |
6177242a AM |
2409 | } |
2410 | ||
e054468f AM |
2411 | flags = SEC_ALLOC | SEC_LINKER_CREATED; |
2412 | s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); | |
ce558b89 | 2413 | htab->elf.iplt = s; |
e054468f | 2414 | if (s == NULL |
fd361982 | 2415 | || !bfd_set_section_alignment (s, 4)) |
0a1b45a2 | 2416 | return false; |
e054468f AM |
2417 | |
2418 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | |
2419 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
14b2f831 | 2420 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); |
ce558b89 | 2421 | htab->elf.irelplt = s; |
e054468f | 2422 | if (s == NULL |
fd361982 | 2423 | || ! bfd_set_section_alignment (s, 2)) |
0a1b45a2 | 2424 | return false; |
93d1b056 | 2425 | |
2d7ad24e AM |
2426 | /* Local plt entries. */ |
2427 | flags = (SEC_ALLOC | SEC_LOAD | |
2428 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2429 | htab->pltlocal = bfd_make_section_anyway_with_flags (abfd, ".branch_lt", | |
2430 | flags); | |
2431 | if (htab->pltlocal == NULL | |
fd361982 | 2432 | || !bfd_set_section_alignment (htab->pltlocal, 2)) |
0a1b45a2 | 2433 | return false; |
2d7ad24e AM |
2434 | |
2435 | if (bfd_link_pic (info)) | |
2436 | { | |
2437 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
2438 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2439 | htab->relpltlocal | |
2440 | = bfd_make_section_anyway_with_flags (abfd, ".rela.branch_lt", flags); | |
2441 | if (htab->relpltlocal == NULL | |
fd361982 | 2442 | || !bfd_set_section_alignment (htab->relpltlocal, 2)) |
0a1b45a2 | 2443 | return false; |
2d7ad24e AM |
2444 | } |
2445 | ||
93d1b056 AM |
2446 | if (!ppc_elf_create_linker_section (abfd, info, 0, |
2447 | &htab->sdata[0])) | |
0a1b45a2 | 2448 | return false; |
93d1b056 AM |
2449 | |
2450 | if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY, | |
2451 | &htab->sdata[1])) | |
0a1b45a2 | 2452 | return false; |
93d1b056 | 2453 | |
0a1b45a2 | 2454 | return true; |
e054468f AM |
2455 | } |
2456 | ||
25dbc73a AM |
2457 | /* We have to create .dynsbss and .rela.sbss here so that they get mapped |
2458 | to output sections (just like _bfd_elf_create_dynamic_sections has | |
2459 | to create .dynbss and .rela.bss). */ | |
3dab13f6 | 2460 | |
0a1b45a2 | 2461 | static bool |
25dbc73a AM |
2462 | ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
2463 | { | |
2464 | struct ppc_elf_link_hash_table *htab; | |
2465 | asection *s; | |
2466 | flagword flags; | |
3dab13f6 | 2467 | |
25dbc73a | 2468 | htab = ppc_elf_hash_table (info); |
3dab13f6 | 2469 | |
ce558b89 | 2470 | if (htab->elf.sgot == NULL |
25dbc73a | 2471 | && !ppc_elf_create_got (abfd, info)) |
0a1b45a2 | 2472 | return false; |
3dab13f6 | 2473 | |
25dbc73a | 2474 | if (!_bfd_elf_create_dynamic_sections (abfd, info)) |
0a1b45a2 | 2475 | return false; |
3dab13f6 | 2476 | |
e054468f AM |
2477 | if (htab->glink == NULL |
2478 | && !ppc_elf_create_glink (abfd, info)) | |
0a1b45a2 | 2479 | return false; |
3dab13f6 | 2480 | |
14b2f831 AM |
2481 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", |
2482 | SEC_ALLOC | SEC_LINKER_CREATED); | |
3b36f7e6 | 2483 | htab->dynsbss = s; |
3496cb2a | 2484 | if (s == NULL) |
0a1b45a2 | 2485 | return false; |
3dab13f6 | 2486 | |
0e1862bb | 2487 | if (! bfd_link_pic (info)) |
25dbc73a | 2488 | { |
e054468f AM |
2489 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
2490 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
14b2f831 | 2491 | s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); |
3b36f7e6 | 2492 | htab->relsbss = s; |
25dbc73a | 2493 | if (s == NULL |
fd361982 | 2494 | || !bfd_set_section_alignment (s, 2)) |
0a1b45a2 | 2495 | return false; |
25dbc73a | 2496 | } |
3dab13f6 | 2497 | |
90c14f0c | 2498 | if (htab->elf.target_os == is_vxworks |
711de32c | 2499 | && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) |
0a1b45a2 | 2500 | return false; |
9d8504b1 | 2501 | |
ce558b89 | 2502 | s = htab->elf.splt; |
3b36f7e6 | 2503 | flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; |
4a3dc543 RS |
2504 | if (htab->plt_type == PLT_VXWORKS) |
2505 | /* The VxWorks PLT is a loaded section with contents. */ | |
2506 | flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; | |
fd361982 | 2507 | return bfd_set_section_flags (s, flags); |
25dbc73a | 2508 | } |
3dab13f6 | 2509 | |
25dbc73a | 2510 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
58111eb7 | 2511 | |
25dbc73a | 2512 | static void |
fcfa13d2 | 2513 | ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, |
25dbc73a AM |
2514 | struct elf_link_hash_entry *dir, |
2515 | struct elf_link_hash_entry *ind) | |
2516 | { | |
2517 | struct ppc_elf_link_hash_entry *edir, *eind; | |
3dab13f6 | 2518 | |
25dbc73a AM |
2519 | edir = (struct ppc_elf_link_hash_entry *) dir; |
2520 | eind = (struct ppc_elf_link_hash_entry *) ind; | |
3dab13f6 | 2521 | |
c79d6685 AM |
2522 | edir->tls_mask |= eind->tls_mask; |
2523 | edir->has_sda_refs |= eind->has_sda_refs; | |
2524 | ||
e81830c5 AM |
2525 | if (edir->elf.versioned != versioned_hidden) |
2526 | edir->elf.ref_dynamic |= eind->elf.ref_dynamic; | |
c79d6685 AM |
2527 | edir->elf.ref_regular |= eind->elf.ref_regular; |
2528 | edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; | |
4a7e5234 | 2529 | edir->elf.non_got_ref |= eind->elf.non_got_ref; |
c79d6685 AM |
2530 | edir->elf.needs_plt |= eind->elf.needs_plt; |
2531 | edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; | |
2532 | ||
287c7eaf AM |
2533 | /* If we were called to copy over info for a weak sym, that's all. */ |
2534 | if (eind->elf.root.type != bfd_link_hash_indirect) | |
2535 | return; | |
2536 | ||
190eb1dd | 2537 | if (ind->dyn_relocs != NULL) |
25dbc73a | 2538 | { |
190eb1dd | 2539 | if (dir->dyn_relocs != NULL) |
3dab13f6 | 2540 | { |
6061a67d AM |
2541 | struct elf_dyn_relocs **pp; |
2542 | struct elf_dyn_relocs *p; | |
3dab13f6 | 2543 | |
fcfa13d2 | 2544 | /* Add reloc counts against the indirect sym to the direct sym |
25dbc73a | 2545 | list. Merge any entries against the same section. */ |
190eb1dd | 2546 | for (pp = &ind->dyn_relocs; (p = *pp) != NULL; ) |
3dab13f6 | 2547 | { |
6061a67d | 2548 | struct elf_dyn_relocs *q; |
25dbc73a | 2549 | |
190eb1dd | 2550 | for (q = dir->dyn_relocs; q != NULL; q = q->next) |
25dbc73a AM |
2551 | if (q->sec == p->sec) |
2552 | { | |
2553 | q->pc_count += p->pc_count; | |
2554 | q->count += p->count; | |
2555 | *pp = p->next; | |
2556 | break; | |
2557 | } | |
2558 | if (q == NULL) | |
2559 | pp = &p->next; | |
3dab13f6 | 2560 | } |
190eb1dd | 2561 | *pp = dir->dyn_relocs; |
3dab13f6 | 2562 | } |
25dbc73a | 2563 | |
190eb1dd L |
2564 | dir->dyn_relocs = ind->dyn_relocs; |
2565 | ind->dyn_relocs = NULL; | |
3dab13f6 | 2566 | } |
3dab13f6 | 2567 | |
a6aa5195 AM |
2568 | /* Copy over the GOT refcount entries that we may have already seen to |
2569 | the symbol which just became indirect. */ | |
fcfa13d2 AM |
2570 | edir->elf.got.refcount += eind->elf.got.refcount; |
2571 | eind->elf.got.refcount = 0; | |
a6aa5195 AM |
2572 | |
2573 | /* And plt entries. */ | |
2574 | if (eind->elf.plt.plist != NULL) | |
2575 | { | |
2576 | if (edir->elf.plt.plist != NULL) | |
2577 | { | |
2578 | struct plt_entry **entp; | |
2579 | struct plt_entry *ent; | |
2580 | ||
2581 | for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) | |
2582 | { | |
2583 | struct plt_entry *dent; | |
2584 | ||
2585 | for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) | |
2586 | if (dent->sec == ent->sec && dent->addend == ent->addend) | |
2587 | { | |
2588 | dent->plt.refcount += ent->plt.refcount; | |
2589 | *entp = ent->next; | |
2590 | break; | |
2591 | } | |
2592 | if (dent == NULL) | |
2593 | entp = &ent->next; | |
2594 | } | |
2595 | *entp = edir->elf.plt.plist; | |
2596 | } | |
2597 | ||
2598 | edir->elf.plt.plist = eind->elf.plt.plist; | |
2599 | eind->elf.plt.plist = NULL; | |
2600 | } | |
2601 | ||
fcfa13d2 | 2602 | if (eind->elf.dynindx != -1) |
25dbc73a | 2603 | { |
fcfa13d2 AM |
2604 | if (edir->elf.dynindx != -1) |
2605 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2606 | edir->elf.dynstr_index); | |
a6aa5195 AM |
2607 | edir->elf.dynindx = eind->elf.dynindx; |
2608 | edir->elf.dynstr_index = eind->elf.dynstr_index; | |
2609 | eind->elf.dynindx = -1; | |
2610 | eind->elf.dynstr_index = 0; | |
25dbc73a | 2611 | } |
25dbc73a | 2612 | } |
3dab13f6 | 2613 | |
25dbc73a AM |
2614 | /* Hook called by the linker routine which adds symbols from an object |
2615 | file. We use it to put .comm items in .sbss, and not .bss. */ | |
58111eb7 | 2616 | |
0a1b45a2 | 2617 | static bool |
25dbc73a AM |
2618 | ppc_elf_add_symbol_hook (bfd *abfd, |
2619 | struct bfd_link_info *info, | |
2620 | Elf_Internal_Sym *sym, | |
2621 | const char **namep ATTRIBUTE_UNUSED, | |
2622 | flagword *flagsp ATTRIBUTE_UNUSED, | |
2623 | asection **secp, | |
2624 | bfd_vma *valp) | |
2625 | { | |
2626 | if (sym->st_shndx == SHN_COMMON | |
0e1862bb | 2627 | && !bfd_link_relocatable (info) |
0c8d6e5c AM |
2628 | && is_ppc_elf (info->output_bfd) |
2629 | && sym->st_size <= elf_gp_size (abfd)) | |
25dbc73a AM |
2630 | { |
2631 | /* Common symbols less than or equal to -G nn bytes are automatically | |
2632 | put into .sbss. */ | |
2633 | struct ppc_elf_link_hash_table *htab; | |
3dab13f6 | 2634 | |
25dbc73a AM |
2635 | htab = ppc_elf_hash_table (info); |
2636 | if (htab->sbss == NULL) | |
2637 | { | |
10885e24 | 2638 | flagword flags = SEC_IS_COMMON | SEC_SMALL_DATA | SEC_LINKER_CREATED; |
3dab13f6 | 2639 | |
644285ef AM |
2640 | if (!htab->elf.dynobj) |
2641 | htab->elf.dynobj = abfd; | |
2642 | ||
3496cb2a L |
2643 | htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, |
2644 | ".sbss", | |
2645 | flags); | |
2646 | if (htab->sbss == NULL) | |
0a1b45a2 | 2647 | return false; |
3dab13f6 | 2648 | } |
3dab13f6 | 2649 | |
25dbc73a AM |
2650 | *secp = htab->sbss; |
2651 | *valp = sym->st_size; | |
2652 | } | |
3dab13f6 | 2653 | |
0a1b45a2 | 2654 | return true; |
3dab13f6 AM |
2655 | } |
2656 | \f | |
25dbc73a AM |
2657 | /* Find a linker generated pointer with a given addend and type. */ |
2658 | ||
2659 | static elf_linker_section_pointers_t * | |
2660 | elf_find_pointer_linker_section | |
2661 | (elf_linker_section_pointers_t *linker_pointers, | |
2662 | bfd_vma addend, | |
2663 | elf_linker_section_t *lsect) | |
252b5132 | 2664 | { |
25dbc73a AM |
2665 | for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) |
2666 | if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) | |
2667 | return linker_pointers; | |
252b5132 | 2668 | |
25dbc73a AM |
2669 | return NULL; |
2670 | } | |
2671 | ||
2672 | /* Allocate a pointer to live in a linker created section. */ | |
2673 | ||
0a1b45a2 | 2674 | static bool |
93d1b056 AM |
2675 | elf_allocate_pointer_linker_section (bfd *abfd, |
2676 | elf_linker_section_t *lsect, | |
2677 | struct elf_link_hash_entry *h, | |
2678 | const Elf_Internal_Rela *rel) | |
25dbc73a AM |
2679 | { |
2680 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; | |
2681 | elf_linker_section_pointers_t *linker_section_ptr; | |
2682 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); | |
2683 | bfd_size_type amt; | |
2684 | ||
2685 | BFD_ASSERT (lsect != NULL); | |
2686 | ||
2687 | /* Is this a global symbol? */ | |
2688 | if (h != NULL) | |
2689 | { | |
2690 | struct ppc_elf_link_hash_entry *eh; | |
2691 | ||
2692 | /* Has this symbol already been allocated? If so, our work is done. */ | |
2693 | eh = (struct ppc_elf_link_hash_entry *) h; | |
2694 | if (elf_find_pointer_linker_section (eh->linker_section_pointer, | |
2695 | rel->r_addend, | |
2696 | lsect)) | |
0a1b45a2 | 2697 | return true; |
25dbc73a AM |
2698 | |
2699 | ptr_linker_section_ptr = &eh->linker_section_pointer; | |
25dbc73a AM |
2700 | } |
2701 | else | |
2702 | { | |
0c8d6e5c | 2703 | BFD_ASSERT (is_ppc_elf (abfd)); |
0ffa91dd | 2704 | |
25dbc73a AM |
2705 | /* Allocation of a pointer to a local symbol. */ |
2706 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); | |
2707 | ||
2708 | /* Allocate a table to hold the local symbols if first time. */ | |
2709 | if (!ptr) | |
2710 | { | |
0ffa91dd | 2711 | unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; |
25dbc73a AM |
2712 | |
2713 | amt = num_symbols; | |
2714 | amt *= sizeof (elf_linker_section_pointers_t *); | |
2715 | ptr = bfd_zalloc (abfd, amt); | |
2716 | ||
2717 | if (!ptr) | |
0a1b45a2 | 2718 | return false; |
25dbc73a AM |
2719 | |
2720 | elf_local_ptr_offsets (abfd) = ptr; | |
2721 | } | |
2722 | ||
2723 | /* Has this symbol already been allocated? If so, our work is done. */ | |
2724 | if (elf_find_pointer_linker_section (ptr[r_symndx], | |
2725 | rel->r_addend, | |
2726 | lsect)) | |
0a1b45a2 | 2727 | return true; |
252b5132 | 2728 | |
25dbc73a | 2729 | ptr_linker_section_ptr = &ptr[r_symndx]; |
25dbc73a | 2730 | } |
41fcb14e | 2731 | |
25dbc73a AM |
2732 | /* Allocate space for a pointer in the linker section, and allocate |
2733 | a new pointer record from internal memory. */ | |
2734 | BFD_ASSERT (ptr_linker_section_ptr != NULL); | |
2735 | amt = sizeof (elf_linker_section_pointers_t); | |
2736 | linker_section_ptr = bfd_alloc (abfd, amt); | |
41fcb14e | 2737 | |
25dbc73a | 2738 | if (!linker_section_ptr) |
0a1b45a2 | 2739 | return false; |
41fcb14e | 2740 | |
25dbc73a AM |
2741 | linker_section_ptr->next = *ptr_linker_section_ptr; |
2742 | linker_section_ptr->addend = rel->r_addend; | |
2743 | linker_section_ptr->lsect = lsect; | |
25dbc73a | 2744 | *ptr_linker_section_ptr = linker_section_ptr; |
41fcb14e | 2745 | |
fd361982 | 2746 | if (!bfd_set_section_alignment (lsect->section, 2)) |
0a1b45a2 | 2747 | return false; |
25dbc73a AM |
2748 | linker_section_ptr->offset = lsect->section->size; |
2749 | lsect->section->size += 4; | |
7619e7c7 | 2750 | |
25dbc73a AM |
2751 | #ifdef DEBUG |
2752 | fprintf (stderr, | |
2753 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", | |
2754 | lsect->name, (long) linker_section_ptr->offset, | |
2755 | (long) lsect->section->size); | |
2756 | #endif | |
7619e7c7 | 2757 | |
0a1b45a2 | 2758 | return true; |
41fcb14e AM |
2759 | } |
2760 | ||
e054468f | 2761 | static struct plt_entry ** |
25dbc73a AM |
2762 | update_local_sym_info (bfd *abfd, |
2763 | Elf_Internal_Shdr *symtab_hdr, | |
2764 | unsigned long r_symndx, | |
2765 | int tls_type) | |
252b5132 | 2766 | { |
25dbc73a | 2767 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); |
e054468f | 2768 | struct plt_entry **local_plt; |
bac3c8c5 | 2769 | unsigned char *local_got_tls_masks; |
252b5132 | 2770 | |
25dbc73a | 2771 | if (local_got_refcounts == NULL) |
252b5132 | 2772 | { |
25dbc73a AM |
2773 | bfd_size_type size = symtab_hdr->sh_info; |
2774 | ||
e054468f AM |
2775 | size *= (sizeof (*local_got_refcounts) |
2776 | + sizeof (*local_plt) | |
2777 | + sizeof (*local_got_tls_masks)); | |
25dbc73a AM |
2778 | local_got_refcounts = bfd_zalloc (abfd, size); |
2779 | if (local_got_refcounts == NULL) | |
e054468f | 2780 | return NULL; |
25dbc73a | 2781 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 2782 | } |
41fcb14e | 2783 | |
e054468f | 2784 | local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); |
bac3c8c5 | 2785 | local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info); |
37da22e5 AM |
2786 | local_got_tls_masks[r_symndx] |= tls_type & 0xff; |
2787 | if ((tls_type & NON_GOT) == 0) | |
e054468f AM |
2788 | local_got_refcounts[r_symndx] += 1; |
2789 | return local_plt + r_symndx; | |
25dbc73a | 2790 | } |
41fcb14e | 2791 | |
0a1b45a2 | 2792 | static bool |
3ec01793 | 2793 | update_plt_info (bfd *abfd, struct plt_entry **plist, |
a6aa5195 AM |
2794 | asection *sec, bfd_vma addend) |
2795 | { | |
2796 | struct plt_entry *ent; | |
2797 | ||
32af9f6e AM |
2798 | if (addend < 32768) |
2799 | sec = NULL; | |
3ec01793 | 2800 | for (ent = *plist; ent != NULL; ent = ent->next) |
a6aa5195 AM |
2801 | if (ent->sec == sec && ent->addend == addend) |
2802 | break; | |
2803 | if (ent == NULL) | |
2804 | { | |
986f0783 | 2805 | size_t amt = sizeof (*ent); |
a6aa5195 AM |
2806 | ent = bfd_alloc (abfd, amt); |
2807 | if (ent == NULL) | |
0a1b45a2 | 2808 | return false; |
3ec01793 | 2809 | ent->next = *plist; |
a6aa5195 AM |
2810 | ent->sec = sec; |
2811 | ent->addend = addend; | |
2812 | ent->plt.refcount = 0; | |
3ec01793 | 2813 | *plist = ent; |
a6aa5195 AM |
2814 | } |
2815 | ent->plt.refcount += 1; | |
0a1b45a2 | 2816 | return true; |
a6aa5195 AM |
2817 | } |
2818 | ||
2819 | static struct plt_entry * | |
3ec01793 | 2820 | find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) |
a6aa5195 AM |
2821 | { |
2822 | struct plt_entry *ent; | |
2823 | ||
2824 | if (addend < 32768) | |
2825 | sec = NULL; | |
3ec01793 | 2826 | for (ent = *plist; ent != NULL; ent = ent->next) |
a6aa5195 AM |
2827 | if (ent->sec == sec && ent->addend == addend) |
2828 | break; | |
2829 | return ent; | |
2830 | } | |
2831 | ||
0a1b45a2 | 2832 | static bool |
e054468f AM |
2833 | is_branch_reloc (enum elf_ppc_reloc_type r_type) |
2834 | { | |
2835 | return (r_type == R_PPC_PLTREL24 | |
2836 | || r_type == R_PPC_LOCAL24PC | |
2837 | || r_type == R_PPC_REL24 | |
2838 | || r_type == R_PPC_REL14 | |
2839 | || r_type == R_PPC_REL14_BRTAKEN | |
2840 | || r_type == R_PPC_REL14_BRNTAKEN | |
2841 | || r_type == R_PPC_ADDR24 | |
2842 | || r_type == R_PPC_ADDR14 | |
2843 | || r_type == R_PPC_ADDR14_BRTAKEN | |
dfdaec14 AJ |
2844 | || r_type == R_PPC_ADDR14_BRNTAKEN |
2845 | || r_type == R_PPC_VLE_REL24); | |
e054468f AM |
2846 | } |
2847 | ||
23cedd1d AM |
2848 | /* Relocs on inline plt call sequence insns prior to the call. */ |
2849 | ||
0a1b45a2 | 2850 | static bool |
23cedd1d AM |
2851 | is_plt_seq_reloc (enum elf_ppc_reloc_type r_type) |
2852 | { | |
2853 | return (r_type == R_PPC_PLT16_HA | |
2854 | || r_type == R_PPC_PLT16_HI | |
2855 | || r_type == R_PPC_PLT16_LO | |
2856 | || r_type == R_PPC_PLTSEQ); | |
2857 | } | |
2858 | ||
e7776f52 AM |
2859 | /* Like bfd_reloc_offset_in_range but without a howto. Return true |
2860 | iff a field of SIZE bytes at OFFSET is within SEC limits. */ | |
2861 | ||
2862 | static bool | |
2863 | offset_in_range (asection *sec, bfd_vma offset, size_t size) | |
2864 | { | |
2865 | return offset <= sec->size && size <= sec->size - offset; | |
2866 | } | |
2867 | ||
25dbc73a AM |
2868 | static void |
2869 | bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) | |
2870 | { | |
4eca0228 | 2871 | _bfd_error_handler |
695344c0 | 2872 | /* xgettext:c-format */ |
871b3ab2 | 2873 | (_("%pB: relocation %s cannot be used when making a shared object"), |
25dbc73a AM |
2874 | abfd, |
2875 | ppc_elf_howto_table[r_type]->name); | |
2876 | bfd_set_error (bfd_error_bad_value); | |
252b5132 RH |
2877 | } |
2878 | ||
25dbc73a AM |
2879 | /* Look through the relocs for a section during the first phase, and |
2880 | allocate space in the global offset table or procedure linkage | |
2881 | table. */ | |
252b5132 | 2882 | |
0a1b45a2 | 2883 | static bool |
25dbc73a AM |
2884 | ppc_elf_check_relocs (bfd *abfd, |
2885 | struct bfd_link_info *info, | |
2886 | asection *sec, | |
2887 | const Elf_Internal_Rela *relocs) | |
252b5132 | 2888 | { |
7619e7c7 | 2889 | struct ppc_elf_link_hash_table *htab; |
25dbc73a AM |
2890 | Elf_Internal_Shdr *symtab_hdr; |
2891 | struct elf_link_hash_entry **sym_hashes; | |
2892 | const Elf_Internal_Rela *rel; | |
2893 | const Elf_Internal_Rela *rel_end; | |
a6aa5195 | 2894 | asection *got2, *sreloc; |
727fc41e | 2895 | struct elf_link_hash_entry *tga; |
25dbc73a | 2896 | |
0e1862bb | 2897 | if (bfd_link_relocatable (info)) |
0a1b45a2 | 2898 | return true; |
252b5132 RH |
2899 | |
2900 | #ifdef DEBUG | |
871b3ab2 | 2901 | _bfd_error_handler ("ppc_elf_check_relocs called for section %pA in %pB", |
25dbc73a | 2902 | sec, abfd); |
252b5132 RH |
2903 | #endif |
2904 | ||
0c8d6e5c | 2905 | BFD_ASSERT (is_ppc_elf (abfd)); |
0ffa91dd | 2906 | |
25dbc73a AM |
2907 | /* Initialize howto table if not already done. */ |
2908 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) | |
2909 | ppc_elf_howto_init (); | |
2910 | ||
7619e7c7 | 2911 | htab = ppc_elf_hash_table (info); |
25f23106 AM |
2912 | if (htab->glink == NULL) |
2913 | { | |
2914 | if (htab->elf.dynobj == NULL) | |
2915 | htab->elf.dynobj = abfd; | |
2916 | if (!ppc_elf_create_glink (htab->elf.dynobj, info)) | |
0a1b45a2 | 2917 | return false; |
25f23106 | 2918 | } |
727fc41e | 2919 | tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
0a1b45a2 | 2920 | false, false, true); |
0ffa91dd | 2921 | symtab_hdr = &elf_symtab_hdr (abfd); |
25dbc73a | 2922 | sym_hashes = elf_sym_hashes (abfd); |
a6aa5195 | 2923 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
25dbc73a AM |
2924 | sreloc = NULL; |
2925 | ||
2926 | rel_end = relocs + sec->reloc_count; | |
2927 | for (rel = relocs; rel < rel_end; rel++) | |
2928 | { | |
2929 | unsigned long r_symndx; | |
2930 | enum elf_ppc_reloc_type r_type; | |
2931 | struct elf_link_hash_entry *h; | |
7a9361c0 | 2932 | Elf_Internal_Sym *isym; |
727fc41e | 2933 | int tls_type; |
cbf95972 | 2934 | struct plt_entry **ifunc; |
2d7ad24e AM |
2935 | struct plt_entry **pltent; |
2936 | bfd_vma addend; | |
25dbc73a AM |
2937 | |
2938 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2939 | if (r_symndx < symtab_hdr->sh_info) | |
7a9361c0 AM |
2940 | { |
2941 | h = NULL; | |
2942 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, r_symndx); | |
2943 | if (isym == NULL) | |
2944 | return false; | |
2945 | } | |
25dbc73a | 2946 | else |
973a3492 L |
2947 | { |
2948 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2949 | while (h->root.type == bfd_link_hash_indirect | |
2950 | || h->root.type == bfd_link_hash_warning) | |
2951 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7a9361c0 | 2952 | isym = NULL; |
973a3492 | 2953 | } |
25dbc73a AM |
2954 | |
2955 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. | |
2956 | This shows up in particular in an R_PPC_ADDR32 in the eabi | |
2957 | startup code. */ | |
3b36f7e6 | 2958 | if (h != NULL |
ce558b89 | 2959 | && htab->elf.sgot == NULL |
3b36f7e6 | 2960 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
252b5132 | 2961 | { |
3b36f7e6 AM |
2962 | if (htab->elf.dynobj == NULL) |
2963 | htab->elf.dynobj = abfd; | |
2964 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) | |
0a1b45a2 | 2965 | return false; |
3b36f7e6 | 2966 | BFD_ASSERT (h == htab->elf.hgot); |
25dbc73a | 2967 | } |
252b5132 | 2968 | |
727fc41e | 2969 | tls_type = 0; |
de972ffa | 2970 | r_type = ELF32_R_TYPE (rel->r_info); |
cbf95972 | 2971 | ifunc = NULL; |
7a9361c0 AM |
2972 | if (h != NULL) |
2973 | { | |
2974 | if (h->type == STT_GNU_IFUNC) | |
2975 | { | |
2976 | h->needs_plt = 1; | |
2977 | ifunc = &h->plt.plist; | |
2978 | } | |
2979 | } | |
2980 | else if (htab->elf.target_os != is_vxworks) | |
e054468f | 2981 | { |
0bed072f | 2982 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
e054468f | 2983 | { |
0bed072f | 2984 | /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */ |
06a162cf | 2985 | ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
37da22e5 | 2986 | NON_GOT | PLT_IFUNC); |
06a162cf | 2987 | if (ifunc == NULL) |
0a1b45a2 | 2988 | return false; |
e054468f | 2989 | |
06a162cf AM |
2990 | /* STT_GNU_IFUNC symbols must have a PLT entry; |
2991 | In a non-pie executable even when there are | |
2992 | no plt calls. */ | |
0e1862bb | 2993 | if (!bfd_link_pic (info) |
08be3224 AM |
2994 | || is_branch_reloc (r_type) |
2995 | || r_type == R_PPC_PLT16_LO | |
2996 | || r_type == R_PPC_PLT16_HI | |
2997 | || r_type == R_PPC_PLT16_HA) | |
e054468f | 2998 | { |
2d7ad24e | 2999 | addend = 0; |
0bed072f | 3000 | if (r_type == R_PPC_PLTREL24) |
08be3224 AM |
3001 | ppc_elf_tdata (abfd)->makes_plt_call = 1; |
3002 | if (bfd_link_pic (info) | |
3003 | && (r_type == R_PPC_PLTREL24 | |
3004 | || r_type == R_PPC_PLT16_LO | |
3005 | || r_type == R_PPC_PLT16_HI | |
3006 | || r_type == R_PPC_PLT16_HA)) | |
3007 | addend = rel->r_addend; | |
0bed072f | 3008 | if (!update_plt_info (abfd, ifunc, got2, addend)) |
0a1b45a2 | 3009 | return false; |
e054468f AM |
3010 | } |
3011 | } | |
25f23106 AM |
3012 | } |
3013 | ||
90c14f0c | 3014 | if (htab->elf.target_os != is_vxworks |
de972ffa AM |
3015 | && is_branch_reloc (r_type) |
3016 | && h != NULL | |
3017 | && h == tga) | |
25f23106 | 3018 | { |
de972ffa AM |
3019 | if (rel != relocs |
3020 | && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD | |
3021 | || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) | |
3022 | /* We have a new-style __tls_get_addr call with a marker | |
3023 | reloc. */ | |
3024 | ; | |
3025 | else | |
3026 | /* Mark this section as having an old-style call. */ | |
9737e8af | 3027 | sec->nomark_tls_get_addr = 1; |
e054468f | 3028 | } |
727fc41e | 3029 | |
25dbc73a AM |
3030 | switch (r_type) |
3031 | { | |
727fc41e AM |
3032 | case R_PPC_TLSGD: |
3033 | case R_PPC_TLSLD: | |
3034 | /* These special tls relocs tie a call to __tls_get_addr with | |
3035 | its parameter symbol. */ | |
37da22e5 AM |
3036 | if (h != NULL) |
3037 | ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK; | |
3038 | else | |
3039 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, | |
3040 | NON_GOT | TLS_TLS | TLS_MARK)) | |
0a1b45a2 | 3041 | return false; |
727fc41e AM |
3042 | break; |
3043 | ||
23cedd1d AM |
3044 | case R_PPC_PLTSEQ: |
3045 | break; | |
3046 | ||
25dbc73a AM |
3047 | case R_PPC_GOT_TLSLD16: |
3048 | case R_PPC_GOT_TLSLD16_LO: | |
3049 | case R_PPC_GOT_TLSLD16_HI: | |
3050 | case R_PPC_GOT_TLSLD16_HA: | |
25dbc73a AM |
3051 | tls_type = TLS_TLS | TLS_LD; |
3052 | goto dogottls; | |
252b5132 | 3053 | |
25dbc73a AM |
3054 | case R_PPC_GOT_TLSGD16: |
3055 | case R_PPC_GOT_TLSGD16_LO: | |
3056 | case R_PPC_GOT_TLSGD16_HI: | |
3057 | case R_PPC_GOT_TLSGD16_HA: | |
3058 | tls_type = TLS_TLS | TLS_GD; | |
3059 | goto dogottls; | |
3060 | ||
3061 | case R_PPC_GOT_TPREL16: | |
3062 | case R_PPC_GOT_TPREL16_LO: | |
3063 | case R_PPC_GOT_TPREL16_HI: | |
3064 | case R_PPC_GOT_TPREL16_HA: | |
7c8bbca5 | 3065 | if (bfd_link_dll (info)) |
25dbc73a AM |
3066 | info->flags |= DF_STATIC_TLS; |
3067 | tls_type = TLS_TLS | TLS_TPREL; | |
3068 | goto dogottls; | |
3069 | ||
3070 | case R_PPC_GOT_DTPREL16: | |
3071 | case R_PPC_GOT_DTPREL16_LO: | |
3072 | case R_PPC_GOT_DTPREL16_HI: | |
3073 | case R_PPC_GOT_DTPREL16_HA: | |
3074 | tls_type = TLS_TLS | TLS_DTPREL; | |
3075 | dogottls: | |
3076 | sec->has_tls_reloc = 1; | |
1a0670f3 | 3077 | /* Fall through. */ |
252b5132 | 3078 | |
25dbc73a AM |
3079 | /* GOT16 relocations */ |
3080 | case R_PPC_GOT16: | |
3081 | case R_PPC_GOT16_LO: | |
3082 | case R_PPC_GOT16_HI: | |
3083 | case R_PPC_GOT16_HA: | |
3084 | /* This symbol requires a global offset table entry. */ | |
ce558b89 | 3085 | if (htab->elf.sgot == NULL) |
25dbc73a AM |
3086 | { |
3087 | if (htab->elf.dynobj == NULL) | |
3088 | htab->elf.dynobj = abfd; | |
3089 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) | |
0a1b45a2 | 3090 | return false; |
25dbc73a AM |
3091 | } |
3092 | if (h != NULL) | |
3093 | { | |
3094 | h->got.refcount += 1; | |
3095 | ppc_elf_hash_entry (h)->tls_mask |= tls_type; | |
3096 | } | |
3097 | else | |
3098 | /* This is a global offset table entry for a local symbol. */ | |
3099 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) | |
0a1b45a2 | 3100 | return false; |
91e21fb7 AM |
3101 | |
3102 | /* We may also need a plt entry if the symbol turns out to be | |
3103 | an ifunc. */ | |
0e1862bb | 3104 | if (h != NULL && !bfd_link_pic (info)) |
91e21fb7 AM |
3105 | { |
3106 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) | |
0a1b45a2 | 3107 | return false; |
91e21fb7 | 3108 | } |
25dbc73a | 3109 | break; |
252b5132 | 3110 | |
25dbc73a AM |
3111 | /* Indirect .sdata relocation. */ |
3112 | case R_PPC_EMB_SDAI16: | |
93d1b056 AM |
3113 | htab->sdata[0].sym->ref_regular = 1; |
3114 | if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0], | |
3115 | h, rel)) | |
0a1b45a2 | 3116 | return false; |
046183de AM |
3117 | if (h != NULL) |
3118 | { | |
0a1b45a2 AM |
3119 | ppc_elf_hash_entry (h)->has_sda_refs = true; |
3120 | h->non_got_ref = true; | |
046183de | 3121 | } |
25dbc73a | 3122 | break; |
252b5132 | 3123 | |
25dbc73a AM |
3124 | /* Indirect .sdata2 relocation. */ |
3125 | case R_PPC_EMB_SDA2I16: | |
c0d9f31d | 3126 | if (!bfd_link_executable (info)) |
25dbc73a AM |
3127 | { |
3128 | bad_shared_reloc (abfd, r_type); | |
0a1b45a2 | 3129 | return false; |
25dbc73a | 3130 | } |
93d1b056 AM |
3131 | htab->sdata[1].sym->ref_regular = 1; |
3132 | if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1], | |
3133 | h, rel)) | |
0a1b45a2 | 3134 | return false; |
046183de AM |
3135 | if (h != NULL) |
3136 | { | |
0a1b45a2 AM |
3137 | ppc_elf_hash_entry (h)->has_sda_refs = true; |
3138 | h->non_got_ref = true; | |
046183de | 3139 | } |
25dbc73a | 3140 | break; |
252b5132 | 3141 | |
93d1b056 AM |
3142 | case R_PPC_SDAREL16: |
3143 | htab->sdata[0].sym->ref_regular = 1; | |
1a0670f3 | 3144 | /* Fall through. */ |
93d1b056 | 3145 | |
b9c361e0 JL |
3146 | case R_PPC_VLE_SDAREL_LO16A: |
3147 | case R_PPC_VLE_SDAREL_LO16D: | |
3148 | case R_PPC_VLE_SDAREL_HI16A: | |
3149 | case R_PPC_VLE_SDAREL_HI16D: | |
3150 | case R_PPC_VLE_SDAREL_HA16A: | |
3151 | case R_PPC_VLE_SDAREL_HA16D: | |
046183de AM |
3152 | if (h != NULL) |
3153 | { | |
0a1b45a2 AM |
3154 | ppc_elf_hash_entry (h)->has_sda_refs = true; |
3155 | h->non_got_ref = true; | |
046183de AM |
3156 | } |
3157 | break; | |
3158 | ||
b9c361e0 JL |
3159 | case R_PPC_VLE_REL8: |
3160 | case R_PPC_VLE_REL15: | |
3161 | case R_PPC_VLE_REL24: | |
3162 | case R_PPC_VLE_LO16A: | |
3163 | case R_PPC_VLE_LO16D: | |
3164 | case R_PPC_VLE_HI16A: | |
3165 | case R_PPC_VLE_HI16D: | |
3166 | case R_PPC_VLE_HA16A: | |
3167 | case R_PPC_VLE_HA16D: | |
83eef883 | 3168 | case R_PPC_VLE_ADDR20: |
b9c361e0 JL |
3169 | break; |
3170 | ||
25dbc73a | 3171 | case R_PPC_EMB_SDA2REL: |
c0d9f31d | 3172 | if (!bfd_link_executable (info)) |
046183de AM |
3173 | { |
3174 | bad_shared_reloc (abfd, r_type); | |
0a1b45a2 | 3175 | return false; |
046183de | 3176 | } |
93d1b056 | 3177 | htab->sdata[1].sym->ref_regular = 1; |
046183de AM |
3178 | if (h != NULL) |
3179 | { | |
0a1b45a2 AM |
3180 | ppc_elf_hash_entry (h)->has_sda_refs = true; |
3181 | h->non_got_ref = true; | |
046183de AM |
3182 | } |
3183 | break; | |
3184 | ||
b9c361e0 JL |
3185 | case R_PPC_VLE_SDA21_LO: |
3186 | case R_PPC_VLE_SDA21: | |
25dbc73a AM |
3187 | case R_PPC_EMB_SDA21: |
3188 | case R_PPC_EMB_RELSDA: | |
046183de AM |
3189 | if (h != NULL) |
3190 | { | |
0a1b45a2 AM |
3191 | ppc_elf_hash_entry (h)->has_sda_refs = true; |
3192 | h->non_got_ref = true; | |
046183de AM |
3193 | } |
3194 | break; | |
3195 | ||
25dbc73a AM |
3196 | case R_PPC_EMB_NADDR32: |
3197 | case R_PPC_EMB_NADDR16: | |
3198 | case R_PPC_EMB_NADDR16_LO: | |
3199 | case R_PPC_EMB_NADDR16_HI: | |
3200 | case R_PPC_EMB_NADDR16_HA: | |
4dc4a9a5 | 3201 | if (h != NULL) |
0a1b45a2 | 3202 | h->non_got_ref = true; |
25dbc73a | 3203 | break; |
252b5132 | 3204 | |
25dbc73a | 3205 | case R_PPC_PLTREL24: |
de972ffa | 3206 | if (h == NULL) |
6d78d0b9 | 3207 | break; |
08be3224 | 3208 | ppc_elf_tdata (abfd)->makes_plt_call = 1; |
3e04d765 | 3209 | goto pltentry; |
08be3224 | 3210 | |
23cedd1d | 3211 | case R_PPC_PLTCALL: |
3e04d765 AM |
3212 | sec->has_pltcall = 1; |
3213 | /* Fall through. */ | |
3214 | ||
6d78d0b9 | 3215 | case R_PPC_PLT32: |
25dbc73a AM |
3216 | case R_PPC_PLTREL32: |
3217 | case R_PPC_PLT16_LO: | |
3218 | case R_PPC_PLT16_HI: | |
3219 | case R_PPC_PLT16_HA: | |
3e04d765 | 3220 | pltentry: |
25dbc73a AM |
3221 | #ifdef DEBUG |
3222 | fprintf (stderr, "Reloc requires a PLT entry\n"); | |
3223 | #endif | |
cbf95972 | 3224 | /* This symbol requires a procedure linkage table entry. */ |
25dbc73a AM |
3225 | if (h == NULL) |
3226 | { | |
2d7ad24e AM |
3227 | pltent = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
3228 | NON_GOT | PLT_KEEP); | |
3229 | if (pltent == NULL) | |
0a1b45a2 | 3230 | return false; |
25dbc73a | 3231 | } |
a6aa5195 AM |
3232 | else |
3233 | { | |
2d7ad24e AM |
3234 | if (r_type != R_PPC_PLTREL24) |
3235 | ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP; | |
a6aa5195 | 3236 | h->needs_plt = 1; |
2d7ad24e | 3237 | pltent = &h->plt.plist; |
a6aa5195 | 3238 | } |
2d7ad24e AM |
3239 | addend = 0; |
3240 | if (bfd_link_pic (info) | |
3241 | && (r_type == R_PPC_PLTREL24 | |
3242 | || r_type == R_PPC_PLT16_LO | |
3243 | || r_type == R_PPC_PLT16_HI | |
3244 | || r_type == R_PPC_PLT16_HA)) | |
3245 | addend = rel->r_addend; | |
3246 | if (!update_plt_info (abfd, pltent, got2, addend)) | |
0a1b45a2 | 3247 | return false; |
25dbc73a | 3248 | break; |
ee05f2fe | 3249 | |
25dbc73a AM |
3250 | /* The following relocations don't need to propagate the |
3251 | relocation if linking a shared object since they are | |
3252 | section relative. */ | |
3253 | case R_PPC_SECTOFF: | |
3254 | case R_PPC_SECTOFF_LO: | |
3255 | case R_PPC_SECTOFF_HI: | |
3256 | case R_PPC_SECTOFF_HA: | |
3257 | case R_PPC_DTPREL16: | |
3258 | case R_PPC_DTPREL16_LO: | |
3259 | case R_PPC_DTPREL16_HI: | |
3260 | case R_PPC_DTPREL16_HA: | |
3261 | case R_PPC_TOC16: | |
3262 | break; | |
252b5132 | 3263 | |
d7128ce4 AM |
3264 | case R_PPC_REL16: |
3265 | case R_PPC_REL16_LO: | |
3266 | case R_PPC_REL16_HI: | |
3267 | case R_PPC_REL16_HA: | |
a680de9a | 3268 | case R_PPC_REL16DX_HA: |
016687f8 | 3269 | ppc_elf_tdata (abfd)->has_rel16 = 1; |
d7128ce4 AM |
3270 | break; |
3271 | ||
a6aa5195 | 3272 | /* These are just markers. */ |
25dbc73a AM |
3273 | case R_PPC_TLS: |
3274 | case R_PPC_EMB_MRKREF: | |
3275 | case R_PPC_NONE: | |
3276 | case R_PPC_max: | |
32af9f6e AM |
3277 | case R_PPC_RELAX: |
3278 | case R_PPC_RELAX_PLT: | |
3279 | case R_PPC_RELAX_PLTREL24: | |
7ba71655 | 3280 | case R_PPC_16DX_HA: |
25dbc73a | 3281 | break; |
252b5132 | 3282 | |
25dbc73a AM |
3283 | /* These should only appear in dynamic objects. */ |
3284 | case R_PPC_COPY: | |
3285 | case R_PPC_GLOB_DAT: | |
3286 | case R_PPC_JMP_SLOT: | |
3287 | case R_PPC_RELATIVE: | |
e054468f | 3288 | case R_PPC_IRELATIVE: |
25dbc73a | 3289 | break; |
252b5132 | 3290 | |
25dbc73a AM |
3291 | /* These aren't handled yet. We'll report an error later. */ |
3292 | case R_PPC_ADDR30: | |
3293 | case R_PPC_EMB_RELSEC16: | |
3294 | case R_PPC_EMB_RELST_LO: | |
3295 | case R_PPC_EMB_RELST_HI: | |
3296 | case R_PPC_EMB_RELST_HA: | |
3297 | case R_PPC_EMB_BIT_FLD: | |
3298 | break; | |
252b5132 | 3299 | |
25dbc73a AM |
3300 | /* This refers only to functions defined in the shared library. */ |
3301 | case R_PPC_LOCAL24PC: | |
727fc41e | 3302 | if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) |
016687f8 AM |
3303 | { |
3304 | htab->plt_type = PLT_OLD; | |
3305 | htab->old_bfd = abfd; | |
3306 | } | |
7a9361c0 AM |
3307 | if (h != NULL |
3308 | && ifunc != NULL | |
3309 | && !update_plt_info (abfd, ifunc, NULL, 0)) | |
3310 | return false; | |
25dbc73a | 3311 | break; |
252b5132 | 3312 | |
25dbc73a AM |
3313 | /* This relocation describes the C++ object vtable hierarchy. |
3314 | Reconstruct it for later use during GC. */ | |
3315 | case R_PPC_GNU_VTINHERIT: | |
3316 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
0a1b45a2 | 3317 | return false; |
25dbc73a | 3318 | break; |
252b5132 | 3319 | |
25dbc73a AM |
3320 | /* This relocation describes which C++ vtable entries are actually |
3321 | used. Record for later use during GC. */ | |
3322 | case R_PPC_GNU_VTENTRY: | |
a0ea3a14 | 3323 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
0a1b45a2 | 3324 | return false; |
25dbc73a | 3325 | break; |
252b5132 | 3326 | |
252dcdf4 AM |
3327 | case R_PPC_TPREL16_HI: |
3328 | case R_PPC_TPREL16_HA: | |
3329 | sec->has_tls_reloc = 1; | |
3330 | /* Fall through. */ | |
7c8bbca5 | 3331 | /* We shouldn't really be seeing TPREL32. */ |
25dbc73a | 3332 | case R_PPC_TPREL32: |
1d483afe AM |
3333 | case R_PPC_TPREL16: |
3334 | case R_PPC_TPREL16_LO: | |
7c8bbca5 | 3335 | if (bfd_link_dll (info)) |
25dbc73a AM |
3336 | info->flags |= DF_STATIC_TLS; |
3337 | goto dodyn; | |
252b5132 | 3338 | |
25dbc73a AM |
3339 | /* Nor these. */ |
3340 | case R_PPC_DTPMOD32: | |
3341 | case R_PPC_DTPREL32: | |
3342 | goto dodyn; | |
252b5132 | 3343 | |
9edfd1af AM |
3344 | case R_PPC_REL32: |
3345 | if (h == NULL | |
3346 | && got2 != NULL | |
3347 | && (sec->flags & SEC_CODE) != 0 | |
0e1862bb | 3348 | && bfd_link_pic (info) |
4a3dc543 | 3349 | && htab->plt_type == PLT_UNSET) |
9edfd1af AM |
3350 | { |
3351 | /* Old -fPIC gcc code has .long LCTOC1-LCFx just before | |
3352 | the start of a function, which assembles to a REL32 | |
3353 | reference to .got2. If we detect one of these, then | |
3354 | force the old PLT layout because the linker cannot | |
3355 | reliably deduce the GOT pointer value needed for | |
3356 | PLT call stubs. */ | |
3357 | asection *s; | |
87d72d41 AM |
3358 | |
3359 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
9edfd1af | 3360 | if (s == got2) |
016687f8 AM |
3361 | { |
3362 | htab->plt_type = PLT_OLD; | |
3363 | htab->old_bfd = abfd; | |
3364 | } | |
9edfd1af | 3365 | } |
7123df0e | 3366 | if (h == NULL || h == htab->elf.hgot) |
fd38b44c | 3367 | break; |
625af618 AM |
3368 | /* fall through */ |
3369 | ||
3370 | case R_PPC_ADDR32: | |
3371 | case R_PPC_ADDR16: | |
3372 | case R_PPC_ADDR16_LO: | |
3373 | case R_PPC_ADDR16_HI: | |
3374 | case R_PPC_ADDR16_HA: | |
3375 | case R_PPC_UADDR32: | |
3376 | case R_PPC_UADDR16: | |
0e1862bb | 3377 | if (h != NULL && !bfd_link_pic (info)) |
625af618 AM |
3378 | { |
3379 | /* We may need a plt entry if the symbol turns out to be | |
3380 | a function defined in a dynamic object. */ | |
3ec01793 | 3381 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
0a1b45a2 | 3382 | return false; |
625af618 AM |
3383 | |
3384 | /* We may need a copy reloc too. */ | |
3385 | h->non_got_ref = 1; | |
3386 | h->pointer_equality_needed = 1; | |
d3e454b9 AM |
3387 | if (r_type == R_PPC_ADDR16_HA) |
3388 | ppc_elf_hash_entry (h)->has_addr16_ha = 1; | |
3389 | if (r_type == R_PPC_ADDR16_LO) | |
3390 | ppc_elf_hash_entry (h)->has_addr16_lo = 1; | |
625af618 AM |
3391 | } |
3392 | goto dodyn; | |
9edfd1af | 3393 | |
25dbc73a AM |
3394 | case R_PPC_REL24: |
3395 | case R_PPC_REL14: | |
3396 | case R_PPC_REL14_BRTAKEN: | |
3397 | case R_PPC_REL14_BRNTAKEN: | |
d7128ce4 | 3398 | if (h == NULL) |
25dbc73a | 3399 | break; |
7123df0e | 3400 | if (h == htab->elf.hgot) |
d7128ce4 | 3401 | { |
7123df0e | 3402 | if (htab->plt_type == PLT_UNSET) |
016687f8 AM |
3403 | { |
3404 | htab->plt_type = PLT_OLD; | |
3405 | htab->old_bfd = abfd; | |
3406 | } | |
d7128ce4 AM |
3407 | break; |
3408 | } | |
25dbc73a | 3409 | /* fall through */ |
ee05f2fe | 3410 | |
25dbc73a | 3411 | case R_PPC_ADDR24: |
25dbc73a AM |
3412 | case R_PPC_ADDR14: |
3413 | case R_PPC_ADDR14_BRTAKEN: | |
3414 | case R_PPC_ADDR14_BRNTAKEN: | |
0e1862bb | 3415 | if (h != NULL && !bfd_link_pic (info)) |
25dbc73a AM |
3416 | { |
3417 | /* We may need a plt entry if the symbol turns out to be | |
3418 | a function defined in a dynamic object. */ | |
e054468f | 3419 | h->needs_plt = 1; |
de972ffa | 3420 | if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) |
0a1b45a2 | 3421 | return false; |
625af618 | 3422 | break; |
25dbc73a | 3423 | } |
7619e7c7 | 3424 | |
25dbc73a | 3425 | dodyn: |
7a9361c0 AM |
3426 | /* Set up information for symbols that might need dynamic |
3427 | relocations. At this point in linking we have read all | |
3428 | the input files and resolved most symbols, but have not | |
3429 | yet decided whether symbols are dynamic or finalized | |
3430 | symbol flags. In some cases we might be setting dynamic | |
3431 | reloc info for symbols that do not end up needing such. | |
3432 | That's OK, adjust_dynamic_symbol and allocate_dynrelocs | |
3433 | work together with this code. */ | |
3434 | if ((h != NULL | |
3435 | && !SYMBOL_REFERENCES_LOCAL (info, h)) | |
3436 | || (bfd_link_pic (info) | |
3437 | && (h != NULL | |
3438 | ? !bfd_is_abs_symbol (&h->root) | |
3439 | : isym->st_shndx != SHN_ABS) | |
3440 | && must_be_dyn_reloc (info, r_type))) | |
25dbc73a | 3441 | { |
25dbc73a AM |
3442 | #ifdef DEBUG |
3443 | fprintf (stderr, | |
3444 | "ppc_elf_check_relocs needs to " | |
3445 | "create relocation for %s\n", | |
3446 | (h && h->root.root.string | |
3447 | ? h->root.root.string : "<unknown>")); | |
3448 | #endif | |
3449 | if (sreloc == NULL) | |
3450 | { | |
c9a2f333 AM |
3451 | if (htab->elf.dynobj == NULL) |
3452 | htab->elf.dynobj = abfd; | |
83bac4b0 NC |
3453 | |
3454 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
0a1b45a2 | 3455 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ true); |
83bac4b0 | 3456 | |
25dbc73a | 3457 | if (sreloc == NULL) |
0a1b45a2 | 3458 | return false; |
25dbc73a | 3459 | } |
7619e7c7 | 3460 | |
25dbc73a AM |
3461 | /* If this is a global symbol, we count the number of |
3462 | relocations we need for this symbol. */ | |
3463 | if (h != NULL) | |
3464 | { | |
f95f8542 AM |
3465 | struct elf_dyn_relocs *p; |
3466 | struct elf_dyn_relocs **rel_head; | |
3467 | ||
190eb1dd | 3468 | rel_head = &h->dyn_relocs; |
f95f8542 AM |
3469 | p = *rel_head; |
3470 | if (p == NULL || p->sec != sec) | |
3471 | { | |
3472 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); | |
3473 | if (p == NULL) | |
0a1b45a2 | 3474 | return false; |
f95f8542 AM |
3475 | p->next = *rel_head; |
3476 | *rel_head = p; | |
3477 | p->sec = sec; | |
3478 | p->count = 0; | |
3479 | p->pc_count = 0; | |
3480 | } | |
3481 | p->count += 1; | |
3482 | if (!must_be_dyn_reloc (info, r_type)) | |
3483 | p->pc_count += 1; | |
25dbc73a AM |
3484 | } |
3485 | else | |
3486 | { | |
3487 | /* Track dynamic relocs needed for local syms too. | |
3488 | We really need local syms available to do this | |
3489 | easily. Oh well. */ | |
f95f8542 AM |
3490 | struct ppc_dyn_relocs *p; |
3491 | struct ppc_dyn_relocs **rel_head; | |
0a1b45a2 | 3492 | bool is_ifunc; |
25dbc73a | 3493 | asection *s; |
6edfbbad | 3494 | void *vpp; |
7fce784e | 3495 | |
87d72d41 AM |
3496 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
3497 | if (s == NULL) | |
3498 | s = sec; | |
3499 | ||
6edfbbad | 3500 | vpp = &elf_section_data (s)->local_dynrel; |
f95f8542 | 3501 | rel_head = (struct ppc_dyn_relocs **) vpp; |
7a9361c0 | 3502 | is_ifunc = ifunc != NULL; |
f95f8542 AM |
3503 | p = *rel_head; |
3504 | if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) | |
3505 | p = p->next; | |
3506 | if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) | |
3507 | { | |
3508 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); | |
3509 | if (p == NULL) | |
0a1b45a2 | 3510 | return false; |
f95f8542 AM |
3511 | p->next = *rel_head; |
3512 | *rel_head = p; | |
3513 | p->sec = sec; | |
3514 | p->ifunc = is_ifunc; | |
3515 | p->count = 0; | |
3516 | } | |
3517 | p->count += 1; | |
25dbc73a | 3518 | } |
7619e7c7 | 3519 | } |
25dbc73a AM |
3520 | |
3521 | break; | |
7619e7c7 AM |
3522 | } |
3523 | } | |
ee05f2fe | 3524 | |
0a1b45a2 | 3525 | return true; |
25dbc73a AM |
3526 | } |
3527 | \f | |
005d79fd AM |
3528 | /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD |
3529 | and OBFD, and merge non-conflicting ones. */ | |
0a1b45a2 | 3530 | bool |
50e03d47 | 3531 | _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info) |
34c8bcba | 3532 | { |
50e03d47 | 3533 | bfd *obfd = info->output_bfd; |
c6e65352 DJ |
3534 | obj_attribute *in_attr, *in_attrs; |
3535 | obj_attribute *out_attr, *out_attrs; | |
0a1b45a2 AM |
3536 | bool ret = true; |
3537 | bool warn_only; | |
6f3fe02b AM |
3538 | |
3539 | /* We only warn about shared library mismatches, because common | |
3540 | libraries advertise support for a particular long double variant | |
3541 | but actually support more than one variant. For example, glibc | |
3542 | typically supports 128-bit IBM long double in the shared library | |
3543 | but has a compatibility static archive for 64-bit long double. | |
3544 | The linker doesn't have the smarts to see that an app using | |
3545 | object files marked as 64-bit long double call the compatibility | |
3546 | layer objects and only from there call into the shared library. */ | |
3547 | warn_only = (ibfd->flags & DYNAMIC) != 0; | |
34c8bcba | 3548 | |
c6e65352 DJ |
3549 | in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; |
3550 | out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; | |
3551 | ||
c6e65352 DJ |
3552 | in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; |
3553 | out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; | |
005d79fd | 3554 | |
c6e65352 | 3555 | if (in_attr->i != out_attr->i) |
34c8bcba | 3556 | { |
005d79fd AM |
3557 | int in_fp = in_attr->i & 3; |
3558 | int out_fp = out_attr->i & 3; | |
4a91d0ba | 3559 | static bfd *last_fp, *last_ld; |
005d79fd AM |
3560 | |
3561 | if (in_fp == 0) | |
34c8bcba | 3562 | ; |
005d79fd AM |
3563 | else if (out_fp == 0) |
3564 | { | |
6f3fe02b AM |
3565 | if (!warn_only) |
3566 | { | |
3567 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL; | |
3568 | out_attr->i ^= in_fp; | |
3569 | last_fp = ibfd; | |
3570 | } | |
005d79fd AM |
3571 | } |
3572 | else if (out_fp != 2 && in_fp == 2) | |
8d2c8c3d AM |
3573 | { |
3574 | _bfd_error_handler | |
3575 | /* xgettext:c-format */ | |
4a91d0ba AM |
3576 | (_("%pB uses hard float, %pB uses soft float"), |
3577 | last_fp, ibfd); | |
6f3fe02b | 3578 | ret = warn_only; |
8d2c8c3d | 3579 | } |
005d79fd | 3580 | else if (out_fp == 2 && in_fp != 2) |
8d2c8c3d AM |
3581 | { |
3582 | _bfd_error_handler | |
3583 | /* xgettext:c-format */ | |
4a91d0ba AM |
3584 | (_("%pB uses hard float, %pB uses soft float"), |
3585 | ibfd, last_fp); | |
6f3fe02b | 3586 | ret = warn_only; |
8d2c8c3d | 3587 | } |
005d79fd | 3588 | else if (out_fp == 1 && in_fp == 3) |
8d2c8c3d AM |
3589 | { |
3590 | _bfd_error_handler | |
3591 | /* xgettext:c-format */ | |
4a91d0ba AM |
3592 | (_("%pB uses double-precision hard float, " |
3593 | "%pB uses single-precision hard float"), last_fp, ibfd); | |
6f3fe02b | 3594 | ret = warn_only; |
8d2c8c3d | 3595 | } |
005d79fd | 3596 | else if (out_fp == 3 && in_fp == 1) |
8d2c8c3d AM |
3597 | { |
3598 | _bfd_error_handler | |
3599 | /* xgettext:c-format */ | |
4a91d0ba AM |
3600 | (_("%pB uses double-precision hard float, " |
3601 | "%pB uses single-precision hard float"), ibfd, last_fp); | |
6f3fe02b | 3602 | ret = warn_only; |
8d2c8c3d | 3603 | } |
005d79fd AM |
3604 | |
3605 | in_fp = in_attr->i & 0xc; | |
3606 | out_fp = out_attr->i & 0xc; | |
3607 | if (in_fp == 0) | |
3608 | ; | |
3609 | else if (out_fp == 0) | |
3610 | { | |
6f3fe02b AM |
3611 | if (!warn_only) |
3612 | { | |
3613 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL; | |
3614 | out_attr->i ^= in_fp; | |
3615 | last_ld = ibfd; | |
3616 | } | |
005d79fd AM |
3617 | } |
3618 | else if (out_fp != 2 * 4 && in_fp == 2 * 4) | |
8d2c8c3d AM |
3619 | { |
3620 | _bfd_error_handler | |
3621 | /* xgettext:c-format */ | |
4a91d0ba AM |
3622 | (_("%pB uses 64-bit long double, " |
3623 | "%pB uses 128-bit long double"), ibfd, last_ld); | |
6f3fe02b | 3624 | ret = warn_only; |
8d2c8c3d | 3625 | } |
005d79fd | 3626 | else if (in_fp != 2 * 4 && out_fp == 2 * 4) |
8d2c8c3d AM |
3627 | { |
3628 | _bfd_error_handler | |
3629 | /* xgettext:c-format */ | |
4a91d0ba AM |
3630 | (_("%pB uses 64-bit long double, " |
3631 | "%pB uses 128-bit long double"), last_ld, ibfd); | |
6f3fe02b | 3632 | ret = warn_only; |
8d2c8c3d | 3633 | } |
005d79fd | 3634 | else if (out_fp == 1 * 4 && in_fp == 3 * 4) |
8d2c8c3d AM |
3635 | { |
3636 | _bfd_error_handler | |
3637 | /* xgettext:c-format */ | |
4a91d0ba AM |
3638 | (_("%pB uses IBM long double, " |
3639 | "%pB uses IEEE long double"), last_ld, ibfd); | |
6f3fe02b | 3640 | ret = warn_only; |
8d2c8c3d | 3641 | } |
005d79fd | 3642 | else if (out_fp == 3 * 4 && in_fp == 1 * 4) |
8d2c8c3d AM |
3643 | { |
3644 | _bfd_error_handler | |
3645 | /* xgettext:c-format */ | |
4a91d0ba AM |
3646 | (_("%pB uses IBM long double, " |
3647 | "%pB uses IEEE long double"), ibfd, last_ld); | |
6f3fe02b | 3648 | ret = warn_only; |
8d2c8c3d | 3649 | } |
c6e65352 | 3650 | } |
4a91d0ba AM |
3651 | |
3652 | if (!ret) | |
3653 | { | |
3654 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR; | |
3655 | bfd_set_error (bfd_error_bad_value); | |
3656 | } | |
3657 | return ret; | |
005d79fd AM |
3658 | } |
3659 | ||
3660 | /* Merge object attributes from IBFD into OBFD. Warn if | |
3661 | there are conflicting attributes. */ | |
0a1b45a2 | 3662 | static bool |
50e03d47 | 3663 | ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info) |
005d79fd | 3664 | { |
50e03d47 | 3665 | bfd *obfd; |
005d79fd AM |
3666 | obj_attribute *in_attr, *in_attrs; |
3667 | obj_attribute *out_attr, *out_attrs; | |
0a1b45a2 | 3668 | bool ret; |
005d79fd | 3669 | |
4a91d0ba | 3670 | if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info)) |
0a1b45a2 | 3671 | return false; |
005d79fd | 3672 | |
50e03d47 | 3673 | obfd = info->output_bfd; |
005d79fd AM |
3674 | in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; |
3675 | out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; | |
c6e65352 DJ |
3676 | |
3677 | /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and | |
3678 | merge non-conflicting ones. */ | |
3679 | in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; | |
3680 | out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; | |
0a1b45a2 | 3681 | ret = true; |
c6e65352 DJ |
3682 | if (in_attr->i != out_attr->i) |
3683 | { | |
005d79fd AM |
3684 | int in_vec = in_attr->i & 3; |
3685 | int out_vec = out_attr->i & 3; | |
4a91d0ba | 3686 | static bfd *last_vec; |
c6e65352 | 3687 | |
005d79fd AM |
3688 | if (in_vec == 0) |
3689 | ; | |
3690 | else if (out_vec == 0) | |
c6e65352 | 3691 | { |
8d2c8c3d | 3692 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL; |
005d79fd | 3693 | out_attr->i = in_vec; |
4a91d0ba | 3694 | last_vec = ibfd; |
c6e65352 | 3695 | } |
c6e65352 DJ |
3696 | /* For now, allow generic to transition to AltiVec or SPE |
3697 | without a warning. If GCC marked files with their stack | |
3698 | alignment and used don't-care markings for files which are | |
3699 | not affected by the vector ABI, we could warn about this | |
3700 | case too. */ | |
005d79fd | 3701 | else if (in_vec == 1) |
c6e65352 | 3702 | ; |
005d79fd AM |
3703 | else if (out_vec == 1) |
3704 | { | |
8d2c8c3d | 3705 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL; |
005d79fd | 3706 | out_attr->i = in_vec; |
4a91d0ba | 3707 | last_vec = ibfd; |
005d79fd AM |
3708 | } |
3709 | else if (out_vec < in_vec) | |
8d2c8c3d AM |
3710 | { |
3711 | _bfd_error_handler | |
3712 | /* xgettext:c-format */ | |
4a91d0ba AM |
3713 | (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"), |
3714 | last_vec, ibfd); | |
8d2c8c3d | 3715 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR; |
0a1b45a2 | 3716 | ret = false; |
8d2c8c3d | 3717 | } |
005d79fd | 3718 | else if (out_vec > in_vec) |
8d2c8c3d AM |
3719 | { |
3720 | _bfd_error_handler | |
3721 | /* xgettext:c-format */ | |
4a91d0ba AM |
3722 | (_("%pB uses AltiVec vector ABI, %pB uses SPE vector ABI"), |
3723 | ibfd, last_vec); | |
8d2c8c3d | 3724 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR; |
0a1b45a2 | 3725 | ret = false; |
8d2c8c3d | 3726 | } |
34c8bcba JM |
3727 | } |
3728 | ||
f82e0623 NF |
3729 | /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes |
3730 | and merge non-conflicting ones. */ | |
3731 | in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; | |
3732 | out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; | |
3733 | if (in_attr->i != out_attr->i) | |
3734 | { | |
005d79fd AM |
3735 | int in_struct = in_attr->i & 3; |
3736 | int out_struct = out_attr->i & 3; | |
4a91d0ba | 3737 | static bfd *last_struct; |
005d79fd AM |
3738 | |
3739 | if (in_struct == 0 || in_struct == 3) | |
f82e0623 | 3740 | ; |
005d79fd AM |
3741 | else if (out_struct == 0) |
3742 | { | |
8d2c8c3d | 3743 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL; |
005d79fd | 3744 | out_attr->i = in_struct; |
4a91d0ba | 3745 | last_struct = ibfd; |
005d79fd AM |
3746 | } |
3747 | else if (out_struct < in_struct) | |
8d2c8c3d AM |
3748 | { |
3749 | _bfd_error_handler | |
3750 | /* xgettext:c-format */ | |
4a91d0ba AM |
3751 | (_("%pB uses r3/r4 for small structure returns, " |
3752 | "%pB uses memory"), last_struct, ibfd); | |
8d2c8c3d | 3753 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR; |
0a1b45a2 | 3754 | ret = false; |
8d2c8c3d | 3755 | } |
005d79fd | 3756 | else if (out_struct > in_struct) |
8d2c8c3d AM |
3757 | { |
3758 | _bfd_error_handler | |
3759 | /* xgettext:c-format */ | |
4a91d0ba AM |
3760 | (_("%pB uses r3/r4 for small structure returns, " |
3761 | "%pB uses memory"), ibfd, last_struct); | |
8d2c8c3d | 3762 | out_attr->type = ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_ERROR; |
0a1b45a2 | 3763 | ret = false; |
8d2c8c3d | 3764 | } |
f82e0623 | 3765 | } |
4a91d0ba AM |
3766 | if (!ret) |
3767 | { | |
3768 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3769 | return false; |
4a91d0ba | 3770 | } |
f82e0623 | 3771 | |
34c8bcba | 3772 | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
8d2c8c3d | 3773 | return _bfd_elf_merge_object_attributes (ibfd, info); |
34c8bcba JM |
3774 | } |
3775 | ||
8853c3d3 AM |
3776 | /* Merge backend specific data from an object file to the output |
3777 | object file when linking. */ | |
3778 | ||
0a1b45a2 | 3779 | static bool |
50e03d47 | 3780 | ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
8853c3d3 | 3781 | { |
50e03d47 | 3782 | bfd *obfd = info->output_bfd; |
8853c3d3 AM |
3783 | flagword old_flags; |
3784 | flagword new_flags; | |
0a1b45a2 | 3785 | bool error; |
8853c3d3 | 3786 | |
0c8d6e5c | 3787 | if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) |
0a1b45a2 | 3788 | return true; |
8853c3d3 | 3789 | |
cc643b88 | 3790 | /* Check if we have the same endianness. */ |
50e03d47 | 3791 | if (! _bfd_generic_verify_endian_match (ibfd, info)) |
0a1b45a2 | 3792 | return false; |
8853c3d3 | 3793 | |
50e03d47 | 3794 | if (!ppc_elf_merge_obj_attributes (ibfd, info)) |
0a1b45a2 | 3795 | return false; |
34c8bcba | 3796 | |
91ed9b71 | 3797 | if ((ibfd->flags & DYNAMIC) != 0) |
0a1b45a2 | 3798 | return true; |
91ed9b71 | 3799 | |
8853c3d3 AM |
3800 | new_flags = elf_elfheader (ibfd)->e_flags; |
3801 | old_flags = elf_elfheader (obfd)->e_flags; | |
3802 | if (!elf_flags_init (obfd)) | |
3803 | { | |
3804 | /* First call, no flags set. */ | |
0a1b45a2 | 3805 | elf_flags_init (obfd) = true; |
8853c3d3 AM |
3806 | elf_elfheader (obfd)->e_flags = new_flags; |
3807 | } | |
3808 | ||
3809 | /* Compatible flags are ok. */ | |
3810 | else if (new_flags == old_flags) | |
3811 | ; | |
3812 | ||
3813 | /* Incompatible flags. */ | |
3814 | else | |
3815 | { | |
3816 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib | |
3817 | to be linked with either. */ | |
0a1b45a2 | 3818 | error = false; |
8853c3d3 AM |
3819 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
3820 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) | |
3821 | { | |
0a1b45a2 | 3822 | error = true; |
4eca0228 | 3823 | _bfd_error_handler |
871b3ab2 | 3824 | (_("%pB: compiled with -mrelocatable and linked with " |
8853c3d3 AM |
3825 | "modules compiled normally"), ibfd); |
3826 | } | |
3827 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 | |
3828 | && (old_flags & EF_PPC_RELOCATABLE) != 0) | |
3829 | { | |
0a1b45a2 | 3830 | error = true; |
4eca0228 | 3831 | _bfd_error_handler |
871b3ab2 | 3832 | (_("%pB: compiled normally and linked with " |
8853c3d3 AM |
3833 | "modules compiled with -mrelocatable"), ibfd); |
3834 | } | |
3835 | ||
3836 | /* The output is -mrelocatable-lib iff both the input files are. */ | |
3837 | if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) | |
3838 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; | |
3839 | ||
3840 | /* The output is -mrelocatable iff it can't be -mrelocatable-lib, | |
3841 | but each input file is either -mrelocatable or -mrelocatable-lib. */ | |
3842 | if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) | |
3843 | && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) | |
3844 | && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) | |
3845 | elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; | |
3846 | ||
3847 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if | |
3848 | any module uses it. */ | |
3849 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); | |
3850 | ||
3851 | new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); | |
3852 | old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); | |
3853 | ||
3854 | /* Warn about any other mismatches. */ | |
3855 | if (new_flags != old_flags) | |
3856 | { | |
0a1b45a2 | 3857 | error = true; |
4eca0228 | 3858 | _bfd_error_handler |
695344c0 | 3859 | /* xgettext:c-format */ |
871b3ab2 | 3860 | (_("%pB: uses different e_flags (%#x) fields " |
cd9af601 AM |
3861 | "than previous modules (%#x)"), |
3862 | ibfd, new_flags, old_flags); | |
8853c3d3 AM |
3863 | } |
3864 | ||
3865 | if (error) | |
3866 | { | |
3867 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 3868 | return false; |
8853c3d3 AM |
3869 | } |
3870 | } | |
3871 | ||
0a1b45a2 | 3872 | return true; |
8853c3d3 | 3873 | } |
b9c361e0 | 3874 | |
e7776f52 | 3875 | static bfd_reloc_status_type |
95f0d0d2 | 3876 | ppc_elf_vle_split16 (bfd *input_bfd, |
08dc996f AM |
3877 | asection *input_section, |
3878 | unsigned long offset, | |
95f0d0d2 | 3879 | bfd_byte *loc, |
86c95733 | 3880 | bfd_vma value, |
08dc996f | 3881 | split16_format_type split16_format, |
0a1b45a2 | 3882 | bool fixup) |
b9c361e0 | 3883 | { |
bb6bf75e | 3884 | unsigned int insn, opcode; |
b9c361e0 | 3885 | |
e7776f52 AM |
3886 | if (!offset_in_range (input_section, offset, 4)) |
3887 | return bfd_reloc_outofrange; | |
95f0d0d2 | 3888 | insn = bfd_get_32 (input_bfd, loc); |
bb6bf75e | 3889 | opcode = insn & E_OPCODE_MASK; |
08dc996f AM |
3890 | if (opcode == E_OR2I_INSN |
3891 | || opcode == E_AND2I_DOT_INSN | |
3892 | || opcode == E_OR2IS_INSN | |
3893 | || opcode == E_LIS_INSN | |
3894 | || opcode == E_AND2IS_DOT_INSN) | |
3895 | { | |
3896 | if (split16_format != split16a_type) | |
3897 | { | |
3898 | if (fixup) | |
3899 | split16_format = split16a_type; | |
3900 | else | |
3901 | _bfd_error_handler | |
3902 | /* xgettext:c-format */ | |
871b3ab2 | 3903 | (_("%pB(%pA+0x%lx): expected 16A style relocation on 0x%08x insn"), |
08dc996f AM |
3904 | input_bfd, input_section, offset, opcode); |
3905 | } | |
3906 | } | |
3907 | else if (opcode == E_ADD2I_DOT_INSN | |
3908 | || opcode == E_ADD2IS_INSN | |
3909 | || opcode == E_CMP16I_INSN | |
3910 | || opcode == E_MULL2I_INSN | |
3911 | || opcode == E_CMPL16I_INSN | |
3912 | || opcode == E_CMPH16I_INSN | |
3913 | || opcode == E_CMPHL16I_INSN) | |
3914 | { | |
3915 | if (split16_format != split16d_type) | |
3916 | { | |
3917 | if (fixup) | |
3918 | split16_format = split16d_type; | |
3919 | else | |
3920 | _bfd_error_handler | |
3921 | /* xgettext:c-format */ | |
871b3ab2 | 3922 | (_("%pB(%pA+0x%lx): expected 16D style relocation on 0x%08x insn"), |
08dc996f AM |
3923 | input_bfd, input_section, offset, opcode); |
3924 | } | |
3925 | } | |
bb6bf75e AM |
3926 | if (split16_format == split16a_type) |
3927 | { | |
3928 | insn &= ~((0xf800 << 5) | 0x7ff); | |
3929 | insn |= (value & 0xf800) << 5; | |
3930 | if ((insn & E_LI_MASK) == E_LI_INSN) | |
3931 | { | |
3932 | /* Hack for e_li. Extend sign. */ | |
3933 | insn &= ~(0xf0000 >> 5); | |
3934 | insn |= (-(value & 0x8000) & 0xf0000) >> 5; | |
3935 | } | |
3936 | } | |
3937 | else | |
3938 | { | |
3939 | insn &= ~((0xf800 << 10) | 0x7ff); | |
3940 | insn |= (value & 0xf800) << 10; | |
3941 | } | |
86c95733 | 3942 | insn |= value & 0x7ff; |
95f0d0d2 | 3943 | bfd_put_32 (input_bfd, insn, loc); |
e7776f52 | 3944 | return bfd_reloc_ok; |
b9c361e0 | 3945 | } |
83eef883 AFB |
3946 | |
3947 | static void | |
3948 | ppc_elf_vle_split20 (bfd *output_bfd, bfd_byte *loc, bfd_vma value) | |
3949 | { | |
3950 | unsigned int insn; | |
3951 | ||
3952 | insn = bfd_get_32 (output_bfd, loc); | |
3953 | /* We have an li20 field, bits 17..20, 11..15, 21..31. */ | |
3954 | /* Top 4 bits of value to 17..20. */ | |
3955 | insn |= (value & 0xf0000) >> 5; | |
3956 | /* Next 5 bits of the value to 11..15. */ | |
3957 | insn |= (value & 0xf800) << 5; | |
3958 | /* And the final 11 bits of the value to bits 21 to 31. */ | |
3959 | insn |= value & 0x7ff; | |
3960 | bfd_put_32 (output_bfd, insn, loc); | |
3961 | } | |
3962 | ||
8853c3d3 | 3963 | \f |
d7128ce4 AM |
3964 | /* Choose which PLT scheme to use, and set .plt flags appropriately. |
3965 | Returns -1 on error, 0 for old PLT, 1 for new PLT. */ | |
3966 | int | |
3967 | ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5446cbdf | 3968 | struct bfd_link_info *info) |
d7128ce4 AM |
3969 | { |
3970 | struct ppc_elf_link_hash_table *htab; | |
9d8504b1 | 3971 | flagword flags; |
d7128ce4 AM |
3972 | |
3973 | htab = ppc_elf_hash_table (info); | |
4a3dc543 RS |
3974 | |
3975 | if (htab->plt_type == PLT_UNSET) | |
016687f8 | 3976 | { |
b3874e1a AM |
3977 | struct elf_link_hash_entry *h; |
3978 | ||
5446cbdf | 3979 | if (htab->params->plt_style == PLT_OLD) |
016687f8 | 3980 | htab->plt_type = PLT_OLD; |
0e1862bb | 3981 | else if (bfd_link_pic (info) |
b3874e1a AM |
3982 | && htab->elf.dynamic_sections_created |
3983 | && (h = elf_link_hash_lookup (&htab->elf, "_mcount", | |
0a1b45a2 | 3984 | false, false, true)) != NULL |
b3874e1a AM |
3985 | && (h->type == STT_FUNC |
3986 | || h->needs_plt) | |
3987 | && h->ref_regular | |
3988 | && !(SYMBOL_CALLS_LOCAL (info, h) | |
21d68fcd | 3989 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))) |
b3874e1a AM |
3990 | { |
3991 | /* Profiling of shared libs (and pies) is not supported with | |
3992 | secure plt, because ppc32 does profiling before a | |
3993 | function prologue and a secure plt pic call stubs needs | |
3994 | r30 to be set up. */ | |
3995 | htab->plt_type = PLT_OLD; | |
3996 | } | |
016687f8 AM |
3997 | else |
3998 | { | |
3999 | bfd *ibfd; | |
5446cbdf | 4000 | enum ppc_elf_plt_type plt_type = htab->params->plt_style; |
016687f8 AM |
4001 | |
4002 | /* Look through the reloc flags left by ppc_elf_check_relocs. | |
4003 | Use the old style bss plt if a file makes plt calls | |
4004 | without using the new relocs, and if ld isn't given | |
4005 | --secure-plt and we never see REL16 relocs. */ | |
4006 | if (plt_type == PLT_UNSET) | |
4007 | plt_type = PLT_OLD; | |
c72f2fb2 | 4008 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) |
0c8d6e5c | 4009 | if (is_ppc_elf (ibfd)) |
016687f8 AM |
4010 | { |
4011 | if (ppc_elf_tdata (ibfd)->has_rel16) | |
4012 | plt_type = PLT_NEW; | |
4013 | else if (ppc_elf_tdata (ibfd)->makes_plt_call) | |
4014 | { | |
4015 | plt_type = PLT_OLD; | |
4016 | htab->old_bfd = ibfd; | |
4017 | break; | |
4018 | } | |
4019 | } | |
4020 | htab->plt_type = plt_type; | |
4021 | } | |
4022 | } | |
5446cbdf | 4023 | if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW) |
b3874e1a AM |
4024 | { |
4025 | if (htab->old_bfd != NULL) | |
cf97bcb0 | 4026 | _bfd_error_handler (_("bss-plt forced due to %pB"), htab->old_bfd); |
b3874e1a | 4027 | else |
cf97bcb0 | 4028 | _bfd_error_handler (_("bss-plt forced by profiling")); |
b3874e1a | 4029 | } |
d7128ce4 | 4030 | |
4a3dc543 | 4031 | BFD_ASSERT (htab->plt_type != PLT_VXWORKS); |
9d8504b1 | 4032 | |
4a3dc543 | 4033 | if (htab->plt_type == PLT_NEW) |
9d8504b1 PB |
4034 | { |
4035 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
4036 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
86b9da88 AM |
4037 | |
4038 | /* The new PLT is a loaded section. */ | |
ce558b89 | 4039 | if (htab->elf.splt != NULL |
fd361982 | 4040 | && !bfd_set_section_flags (htab->elf.splt, flags)) |
86b9da88 AM |
4041 | return -1; |
4042 | ||
4043 | /* The new GOT is not executable. */ | |
ce558b89 | 4044 | if (htab->elf.sgot != NULL |
fd361982 | 4045 | && !bfd_set_section_flags (htab->elf.sgot, flags)) |
86b9da88 | 4046 | return -1; |
d7128ce4 AM |
4047 | } |
4048 | else | |
4049 | { | |
4050 | /* Stop an unused .glink section from affecting .text alignment. */ | |
86b9da88 | 4051 | if (htab->glink != NULL |
fd361982 | 4052 | && !bfd_set_section_alignment (htab->glink, 0)) |
86b9da88 | 4053 | return -1; |
d7128ce4 | 4054 | } |
4a3dc543 | 4055 | return htab->plt_type == PLT_NEW; |
d7128ce4 AM |
4056 | } |
4057 | \f | |
25dbc73a AM |
4058 | /* Return the section that should be marked against GC for a given |
4059 | relocation. */ | |
586119b3 | 4060 | |
25dbc73a AM |
4061 | static asection * |
4062 | ppc_elf_gc_mark_hook (asection *sec, | |
07adf181 | 4063 | struct bfd_link_info *info, |
25dbc73a AM |
4064 | Elf_Internal_Rela *rel, |
4065 | struct elf_link_hash_entry *h, | |
4066 | Elf_Internal_Sym *sym) | |
4067 | { | |
4068 | if (h != NULL) | |
07adf181 AM |
4069 | switch (ELF32_R_TYPE (rel->r_info)) |
4070 | { | |
4071 | case R_PPC_GNU_VTINHERIT: | |
4072 | case R_PPC_GNU_VTENTRY: | |
4073 | return NULL; | |
4074 | } | |
4075 | ||
4076 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
25dbc73a | 4077 | } |
49c09209 | 4078 | |
0a1b45a2 | 4079 | static bool |
49c09209 AM |
4080 | get_sym_h (struct elf_link_hash_entry **hp, |
4081 | Elf_Internal_Sym **symp, | |
4082 | asection **symsecp, | |
4083 | unsigned char **tls_maskp, | |
4084 | Elf_Internal_Sym **locsymsp, | |
4085 | unsigned long r_symndx, | |
4086 | bfd *ibfd) | |
4087 | { | |
4088 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); | |
4089 | ||
4090 | if (r_symndx >= symtab_hdr->sh_info) | |
4091 | { | |
4092 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); | |
4093 | struct elf_link_hash_entry *h; | |
4094 | ||
4095 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
4096 | while (h->root.type == bfd_link_hash_indirect | |
4097 | || h->root.type == bfd_link_hash_warning) | |
4098 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4099 | ||
4100 | if (hp != NULL) | |
4101 | *hp = h; | |
4102 | ||
4103 | if (symp != NULL) | |
4104 | *symp = NULL; | |
4105 | ||
4106 | if (symsecp != NULL) | |
4107 | { | |
4108 | asection *symsec = NULL; | |
4109 | if (h->root.type == bfd_link_hash_defined | |
4110 | || h->root.type == bfd_link_hash_defweak) | |
4111 | symsec = h->root.u.def.section; | |
4112 | *symsecp = symsec; | |
4113 | } | |
4114 | ||
4115 | if (tls_maskp != NULL) | |
4116 | *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask; | |
4117 | } | |
4118 | else | |
4119 | { | |
4120 | Elf_Internal_Sym *sym; | |
4121 | Elf_Internal_Sym *locsyms = *locsymsp; | |
4122 | ||
4123 | if (locsyms == NULL) | |
4124 | { | |
4125 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
4126 | if (locsyms == NULL) | |
4127 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, | |
4128 | symtab_hdr->sh_info, | |
4129 | 0, NULL, NULL, NULL); | |
4130 | if (locsyms == NULL) | |
0a1b45a2 | 4131 | return false; |
49c09209 AM |
4132 | *locsymsp = locsyms; |
4133 | } | |
4134 | sym = locsyms + r_symndx; | |
4135 | ||
4136 | if (hp != NULL) | |
4137 | *hp = NULL; | |
4138 | ||
4139 | if (symp != NULL) | |
4140 | *symp = sym; | |
4141 | ||
4142 | if (symsecp != NULL) | |
4143 | *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx); | |
4144 | ||
4145 | if (tls_maskp != NULL) | |
4146 | { | |
4147 | bfd_signed_vma *local_got; | |
4148 | unsigned char *tls_mask; | |
4149 | ||
4150 | tls_mask = NULL; | |
4151 | local_got = elf_local_got_refcounts (ibfd); | |
4152 | if (local_got != NULL) | |
4153 | { | |
4154 | struct plt_entry **local_plt = (struct plt_entry **) | |
4155 | (local_got + symtab_hdr->sh_info); | |
4156 | unsigned char *lgot_masks = (unsigned char *) | |
4157 | (local_plt + symtab_hdr->sh_info); | |
4158 | tls_mask = &lgot_masks[r_symndx]; | |
4159 | } | |
4160 | *tls_maskp = tls_mask; | |
4161 | } | |
4162 | } | |
0a1b45a2 | 4163 | return true; |
49c09209 | 4164 | } |
25dbc73a | 4165 | \f |
3e04d765 AM |
4166 | /* Analyze inline PLT call relocations to see whether calls to locally |
4167 | defined functions can be converted to direct calls. */ | |
4168 | ||
0a1b45a2 | 4169 | bool |
3e04d765 AM |
4170 | ppc_elf_inline_plt (struct bfd_link_info *info) |
4171 | { | |
4172 | struct ppc_elf_link_hash_table *htab; | |
4173 | bfd *ibfd; | |
4174 | asection *sec; | |
4175 | bfd_vma low_vma, high_vma, limit; | |
4176 | ||
4177 | htab = ppc_elf_hash_table (info); | |
4178 | if (htab == NULL) | |
0a1b45a2 | 4179 | return false; |
3e04d765 AM |
4180 | |
4181 | /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is | |
4182 | reduced somewhat to cater for possible stubs that might be added | |
4183 | between the call and its destination. */ | |
4184 | limit = 0x1e00000; | |
4185 | low_vma = -1; | |
4186 | high_vma = 0; | |
4187 | for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next) | |
4188 | if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE)) | |
4189 | { | |
4190 | if (low_vma > sec->vma) | |
4191 | low_vma = sec->vma; | |
4192 | if (high_vma < sec->vma + sec->size) | |
4193 | high_vma = sec->vma + sec->size; | |
4194 | } | |
4195 | ||
4196 | /* If a "bl" can reach anywhere in local code sections, then we can | |
4197 | convert all inline PLT sequences to direct calls when the symbol | |
4198 | is local. */ | |
4199 | if (high_vma - low_vma < limit) | |
4200 | { | |
4201 | htab->can_convert_all_inline_plt = 1; | |
0a1b45a2 | 4202 | return true; |
3e04d765 AM |
4203 | } |
4204 | ||
4205 | /* Otherwise, go looking through relocs for cases where a direct | |
4206 | call won't reach. Mark the symbol on any such reloc to disable | |
4207 | the optimization and keep the PLT entry as it seems likely that | |
4208 | this will be better than creating trampolines. Note that this | |
4209 | will disable the optimization for all inline PLT calls to a | |
4210 | particular symbol, not just those that won't reach. The | |
4211 | difficulty in doing a more precise optimization is that the | |
4212 | linker needs to make a decision depending on whether a | |
4213 | particular R_PPC_PLTCALL insn can be turned into a direct | |
4214 | call, for each of the R_PPC_PLTSEQ and R_PPC_PLT16* insns in | |
4215 | the sequence, and there is nothing that ties those relocs | |
4216 | together except their symbol. */ | |
4217 | ||
4218 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
4219 | { | |
4220 | Elf_Internal_Shdr *symtab_hdr; | |
4221 | Elf_Internal_Sym *local_syms; | |
4222 | ||
4223 | if (!is_ppc_elf (ibfd)) | |
4224 | continue; | |
4225 | ||
4226 | local_syms = NULL; | |
4227 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
4228 | ||
4229 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
4230 | if (sec->has_pltcall | |
4231 | && !bfd_is_abs_section (sec->output_section)) | |
4232 | { | |
4233 | Elf_Internal_Rela *relstart, *rel, *relend; | |
4234 | ||
4235 | /* Read the relocations. */ | |
4236 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, | |
4237 | info->keep_memory); | |
4238 | if (relstart == NULL) | |
0a1b45a2 | 4239 | return false; |
3e04d765 AM |
4240 | |
4241 | relend = relstart + sec->reloc_count; | |
337d0bf8 | 4242 | for (rel = relstart; rel < relend; rel++) |
3e04d765 AM |
4243 | { |
4244 | enum elf_ppc_reloc_type r_type; | |
4245 | unsigned long r_symndx; | |
4246 | asection *sym_sec; | |
4247 | struct elf_link_hash_entry *h; | |
4248 | Elf_Internal_Sym *sym; | |
4249 | unsigned char *tls_maskp; | |
4250 | ||
4251 | r_type = ELF32_R_TYPE (rel->r_info); | |
4252 | if (r_type != R_PPC_PLTCALL) | |
4253 | continue; | |
4254 | ||
4255 | r_symndx = ELF32_R_SYM (rel->r_info); | |
4256 | if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms, | |
4257 | r_symndx, ibfd)) | |
4258 | { | |
4259 | if (elf_section_data (sec)->relocs != relstart) | |
4260 | free (relstart); | |
c9594989 | 4261 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
3e04d765 | 4262 | free (local_syms); |
0a1b45a2 | 4263 | return false; |
3e04d765 AM |
4264 | } |
4265 | ||
4266 | if (sym_sec != NULL && sym_sec->output_section != NULL) | |
4267 | { | |
4268 | bfd_vma from, to; | |
4269 | if (h != NULL) | |
4270 | to = h->root.u.def.value; | |
4271 | else | |
4272 | to = sym->st_value; | |
4273 | to += (rel->r_addend | |
4274 | + sym_sec->output_offset | |
4275 | + sym_sec->output_section->vma); | |
4276 | from = (rel->r_offset | |
4277 | + sec->output_offset | |
4278 | + sec->output_section->vma); | |
4279 | if (to - from + limit < 2 * limit) | |
4280 | *tls_maskp &= ~PLT_KEEP; | |
4281 | } | |
4282 | } | |
4283 | if (elf_section_data (sec)->relocs != relstart) | |
4284 | free (relstart); | |
4285 | } | |
4286 | ||
4287 | if (local_syms != NULL | |
4288 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
4289 | { | |
4290 | if (!info->keep_memory) | |
4291 | free (local_syms); | |
4292 | else | |
4293 | symtab_hdr->contents = (unsigned char *) local_syms; | |
4294 | } | |
4295 | } | |
4296 | ||
0a1b45a2 | 4297 | return true; |
3e04d765 AM |
4298 | } |
4299 | ||
3a71aa26 AM |
4300 | /* Set plt output section type, htab->tls_get_addr, and call the |
4301 | generic ELF tls_setup function. */ | |
7fce784e | 4302 | |
25dbc73a | 4303 | asection * |
5446cbdf | 4304 | ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) |
7fce784e | 4305 | { |
25dbc73a | 4306 | struct ppc_elf_link_hash_table *htab; |
7fce784e | 4307 | |
25dbc73a | 4308 | htab = ppc_elf_hash_table (info); |
a7f2871e | 4309 | htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
0a1b45a2 | 4310 | false, false, true); |
f01f1741 | 4311 | if (htab->plt_type != PLT_NEW) |
0a1b45a2 | 4312 | htab->params->no_tls_get_addr_opt = true; |
f01f1741 | 4313 | |
5446cbdf | 4314 | if (!htab->params->no_tls_get_addr_opt) |
a7f2871e AM |
4315 | { |
4316 | struct elf_link_hash_entry *opt, *tga; | |
4317 | opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", | |
0a1b45a2 | 4318 | false, false, true); |
a7f2871e AM |
4319 | if (opt != NULL |
4320 | && (opt->root.type == bfd_link_hash_defined | |
4321 | || opt->root.type == bfd_link_hash_defweak)) | |
4322 | { | |
4323 | /* If glibc supports an optimized __tls_get_addr call stub, | |
4324 | signalled by the presence of __tls_get_addr_opt, and we'll | |
4325 | be calling __tls_get_addr via a plt call stub, then | |
4326 | make __tls_get_addr point to __tls_get_addr_opt. */ | |
4327 | tga = htab->tls_get_addr; | |
4328 | if (htab->elf.dynamic_sections_created | |
4329 | && tga != NULL | |
4330 | && (tga->type == STT_FUNC | |
4331 | || tga->needs_plt) | |
4332 | && !(SYMBOL_CALLS_LOCAL (info, tga) | |
21d68fcd | 4333 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga))) |
a7f2871e AM |
4334 | { |
4335 | struct plt_entry *ent; | |
32af9f6e AM |
4336 | for (ent = tga->plt.plist; ent != NULL; ent = ent->next) |
4337 | if (ent->plt.refcount > 0) | |
4338 | break; | |
4339 | if (ent != NULL) | |
a7f2871e AM |
4340 | { |
4341 | tga->root.type = bfd_link_hash_indirect; | |
4342 | tga->root.u.i.link = &opt->root; | |
4343 | ppc_elf_copy_indirect_symbol (info, opt, tga); | |
b531344c | 4344 | opt->mark = 1; |
a7f2871e AM |
4345 | if (opt->dynindx != -1) |
4346 | { | |
4347 | /* Use __tls_get_addr_opt in dynamic relocations. */ | |
4348 | opt->dynindx = -1; | |
4349 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
4350 | opt->dynstr_index); | |
4351 | if (!bfd_elf_link_record_dynamic_symbol (info, opt)) | |
0a1b45a2 | 4352 | return false; |
a7f2871e AM |
4353 | } |
4354 | htab->tls_get_addr = opt; | |
4355 | } | |
4356 | } | |
4357 | } | |
4358 | else | |
0a1b45a2 | 4359 | htab->params->no_tls_get_addr_opt = true; |
a7f2871e | 4360 | } |
4a3dc543 | 4361 | if (htab->plt_type == PLT_NEW |
ce558b89 AM |
4362 | && htab->elf.splt != NULL |
4363 | && htab->elf.splt->output_section != NULL) | |
d7128ce4 | 4364 | { |
ce558b89 AM |
4365 | elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS; |
4366 | elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE; | |
d7128ce4 AM |
4367 | } |
4368 | ||
25dbc73a | 4369 | return _bfd_elf_tls_setup (obfd, info); |
7fce784e AS |
4370 | } |
4371 | ||
3a71aa26 AM |
4372 | /* Return TRUE iff REL is a branch reloc with a global symbol matching |
4373 | HASH. */ | |
4374 | ||
0a1b45a2 | 4375 | static bool |
3a71aa26 AM |
4376 | branch_reloc_hash_match (const bfd *ibfd, |
4377 | const Elf_Internal_Rela *rel, | |
4378 | const struct elf_link_hash_entry *hash) | |
4379 | { | |
4380 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); | |
4381 | enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); | |
4382 | unsigned int r_symndx = ELF32_R_SYM (rel->r_info); | |
4383 | ||
e054468f | 4384 | if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) |
3a71aa26 AM |
4385 | { |
4386 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); | |
4387 | struct elf_link_hash_entry *h; | |
4388 | ||
4389 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
4390 | while (h->root.type == bfd_link_hash_indirect | |
4391 | || h->root.type == bfd_link_hash_warning) | |
4392 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4393 | if (h == hash) | |
0a1b45a2 | 4394 | return true; |
3a71aa26 | 4395 | } |
0a1b45a2 | 4396 | return false; |
3a71aa26 AM |
4397 | } |
4398 | ||
25dbc73a AM |
4399 | /* Run through all the TLS relocs looking for optimization |
4400 | opportunities. */ | |
252b5132 | 4401 | |
0a1b45a2 | 4402 | bool |
25dbc73a AM |
4403 | ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, |
4404 | struct bfd_link_info *info) | |
252b5132 | 4405 | { |
7fce784e | 4406 | bfd *ibfd; |
25dbc73a AM |
4407 | asection *sec; |
4408 | struct ppc_elf_link_hash_table *htab; | |
b7fcf6f6 | 4409 | int pass; |
252b5132 | 4410 | |
3cbc1e5e | 4411 | if (!bfd_link_executable (info)) |
0a1b45a2 | 4412 | return true; |
252b5132 | 4413 | |
7619e7c7 | 4414 | htab = ppc_elf_hash_table (info); |
663a1470 | 4415 | if (htab == NULL) |
0a1b45a2 | 4416 | return false; |
663a1470 | 4417 | |
252dcdf4 AM |
4418 | htab->do_tls_opt = 1; |
4419 | ||
b7fcf6f6 AM |
4420 | /* Make two passes through the relocs. First time check that tls |
4421 | relocs involved in setting up a tls_get_addr call are indeed | |
663a1470 AM |
4422 | followed by such a call. If they are not, don't do any tls |
4423 | optimization. On the second pass twiddle tls_mask flags to | |
4424 | notify relocate_section that optimization can be done, and | |
4425 | adjust got and plt refcounts. */ | |
b7fcf6f6 | 4426 | for (pass = 0; pass < 2; ++pass) |
c72f2fb2 | 4427 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
b7fcf6f6 | 4428 | { |
0ffa91dd | 4429 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
32af9f6e | 4430 | asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); |
7619e7c7 | 4431 | |
b7fcf6f6 AM |
4432 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
4433 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) | |
4434 | { | |
4435 | Elf_Internal_Rela *relstart, *rel, *relend; | |
663a1470 | 4436 | int expecting_tls_get_addr = 0; |
252b5132 | 4437 | |
b7fcf6f6 AM |
4438 | /* Read the relocations. */ |
4439 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, | |
4440 | info->keep_memory); | |
4441 | if (relstart == NULL) | |
0a1b45a2 | 4442 | return false; |
7619e7c7 | 4443 | |
b7fcf6f6 AM |
4444 | relend = relstart + sec->reloc_count; |
4445 | for (rel = relstart; rel < relend; rel++) | |
4446 | { | |
4447 | enum elf_ppc_reloc_type r_type; | |
4448 | unsigned long r_symndx; | |
4449 | struct elf_link_hash_entry *h = NULL; | |
bac3c8c5 | 4450 | unsigned char *tls_mask; |
37da22e5 | 4451 | unsigned char tls_set, tls_clear; |
0a1b45a2 | 4452 | bool is_local; |
b7fcf6f6 AM |
4453 | bfd_signed_vma *got_count; |
4454 | ||
4455 | r_symndx = ELF32_R_SYM (rel->r_info); | |
4456 | if (r_symndx >= symtab_hdr->sh_info) | |
4457 | { | |
4458 | struct elf_link_hash_entry **sym_hashes; | |
7fce784e | 4459 | |
b7fcf6f6 AM |
4460 | sym_hashes = elf_sym_hashes (ibfd); |
4461 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
4462 | while (h->root.type == bfd_link_hash_indirect | |
4463 | || h->root.type == bfd_link_hash_warning) | |
4464 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4465 | } | |
7619e7c7 | 4466 | |
f749f26e | 4467 | is_local = SYMBOL_REFERENCES_LOCAL (info, h); |
b7fcf6f6 | 4468 | r_type = ELF32_R_TYPE (rel->r_info); |
663a1470 AM |
4469 | /* If this section has old-style __tls_get_addr calls |
4470 | without marker relocs, then check that each | |
4471 | __tls_get_addr call reloc is preceded by a reloc | |
4472 | that conceivably belongs to the __tls_get_addr arg | |
4473 | setup insn. If we don't find matching arg setup | |
4474 | relocs, don't do any tls optimization. */ | |
4475 | if (pass == 0 | |
9737e8af | 4476 | && sec->nomark_tls_get_addr |
663a1470 AM |
4477 | && h != NULL |
4478 | && h == htab->tls_get_addr | |
4479 | && !expecting_tls_get_addr | |
4480 | && is_branch_reloc (r_type)) | |
4481 | { | |
25f53a85 | 4482 | info->callbacks->minfo ("%H __tls_get_addr lost arg, " |
663a1470 AM |
4483 | "TLS optimization disabled\n", |
4484 | ibfd, sec, rel->r_offset); | |
4485 | if (elf_section_data (sec)->relocs != relstart) | |
4486 | free (relstart); | |
0a1b45a2 | 4487 | return true; |
663a1470 AM |
4488 | } |
4489 | ||
4490 | expecting_tls_get_addr = 0; | |
b7fcf6f6 AM |
4491 | switch (r_type) |
4492 | { | |
4493 | case R_PPC_GOT_TLSLD16: | |
4494 | case R_PPC_GOT_TLSLD16_LO: | |
4495 | expecting_tls_get_addr = 1; | |
1a0670f3 | 4496 | /* Fall through. */ |
b7fcf6f6 AM |
4497 | |
4498 | case R_PPC_GOT_TLSLD16_HI: | |
4499 | case R_PPC_GOT_TLSLD16_HA: | |
4500 | /* These relocs should never be against a symbol | |
4501 | defined in a shared lib. Leave them alone if | |
4502 | that turns out to be the case. */ | |
4503 | if (!is_local) | |
4504 | continue; | |
4505 | ||
4506 | /* LD -> LE */ | |
4507 | tls_set = 0; | |
4508 | tls_clear = TLS_LD; | |
4509 | break; | |
4510 | ||
4511 | case R_PPC_GOT_TLSGD16: | |
4512 | case R_PPC_GOT_TLSGD16_LO: | |
4513 | expecting_tls_get_addr = 1; | |
1a0670f3 | 4514 | /* Fall through. */ |
b7fcf6f6 AM |
4515 | |
4516 | case R_PPC_GOT_TLSGD16_HI: | |
4517 | case R_PPC_GOT_TLSGD16_HA: | |
4518 | if (is_local) | |
4519 | /* GD -> LE */ | |
4520 | tls_set = 0; | |
4521 | else | |
4522 | /* GD -> IE */ | |
b00a0a86 | 4523 | tls_set = TLS_TLS | TLS_GDIE; |
b7fcf6f6 AM |
4524 | tls_clear = TLS_GD; |
4525 | break; | |
4526 | ||
4527 | case R_PPC_GOT_TPREL16: | |
4528 | case R_PPC_GOT_TPREL16_LO: | |
4529 | case R_PPC_GOT_TPREL16_HI: | |
4530 | case R_PPC_GOT_TPREL16_HA: | |
4531 | if (is_local) | |
4532 | { | |
4533 | /* IE -> LE */ | |
4534 | tls_set = 0; | |
4535 | tls_clear = TLS_TPREL; | |
4536 | break; | |
4537 | } | |
4538 | else | |
4539 | continue; | |
4540 | ||
32af9f6e | 4541 | case R_PPC_TLSLD: |
7d04a20a AM |
4542 | if (!is_local) |
4543 | continue; | |
4544 | /* Fall through. */ | |
4545 | case R_PPC_TLSGD: | |
23cedd1d AM |
4546 | if (rel + 1 < relend |
4547 | && is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info))) | |
4548 | { | |
4549 | if (pass != 0 | |
4550 | && ELF32_R_TYPE (rel[1].r_info) != R_PPC_PLTSEQ) | |
4551 | { | |
4552 | r_type = ELF32_R_TYPE (rel[1].r_info); | |
4553 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
4554 | if (r_symndx >= symtab_hdr->sh_info) | |
4555 | { | |
4556 | struct elf_link_hash_entry **sym_hashes; | |
4557 | ||
4558 | sym_hashes = elf_sym_hashes (ibfd); | |
4559 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
4560 | while (h->root.type == bfd_link_hash_indirect | |
4561 | || h->root.type == bfd_link_hash_warning) | |
4562 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4563 | if (h != NULL) | |
4564 | { | |
4565 | struct plt_entry *ent = NULL; | |
4566 | bfd_vma addend = 0; | |
4567 | ||
4568 | if (bfd_link_pic (info)) | |
4569 | addend = rel->r_addend; | |
4570 | ent = find_plt_ent (&h->plt.plist, | |
4571 | got2, addend); | |
4572 | if (ent != NULL | |
4573 | && ent->plt.refcount > 0) | |
4574 | ent->plt.refcount -= 1; | |
4575 | } | |
4576 | } | |
4577 | } | |
4578 | continue; | |
4579 | } | |
32af9f6e AM |
4580 | expecting_tls_get_addr = 2; |
4581 | tls_set = 0; | |
4582 | tls_clear = 0; | |
4583 | break; | |
4584 | ||
252dcdf4 AM |
4585 | case R_PPC_TPREL16_HA: |
4586 | if (pass == 0) | |
4587 | { | |
4588 | unsigned char buf[4]; | |
4589 | unsigned int insn; | |
4590 | bfd_vma off = rel->r_offset & ~3; | |
4591 | if (!bfd_get_section_contents (ibfd, sec, buf, | |
4592 | off, 4)) | |
4593 | { | |
4594 | if (elf_section_data (sec)->relocs != relstart) | |
4595 | free (relstart); | |
0a1b45a2 | 4596 | return false; |
252dcdf4 AM |
4597 | } |
4598 | insn = bfd_get_32 (ibfd, buf); | |
4599 | /* addis rt,2,imm */ | |
4600 | if ((insn & ((0x3fu << 26) | 0x1f << 16)) | |
4601 | != ((15u << 26) | (2 << 16))) | |
4602 | { | |
4603 | /* xgettext:c-format */ | |
4604 | info->callbacks->minfo | |
4605 | (_("%H: warning: %s unexpected insn %#x.\n"), | |
4606 | ibfd, sec, off, "R_PPC_TPREL16_HA", insn); | |
4607 | htab->do_tls_opt = 0; | |
4608 | } | |
4609 | } | |
4610 | continue; | |
4611 | ||
4612 | case R_PPC_TPREL16_HI: | |
4613 | htab->do_tls_opt = 0; | |
4614 | continue; | |
4615 | ||
b7fcf6f6 | 4616 | default: |
25dbc73a | 4617 | continue; |
b7fcf6f6 | 4618 | } |
25dbc73a | 4619 | |
b7fcf6f6 AM |
4620 | if (pass == 0) |
4621 | { | |
727fc41e | 4622 | if (!expecting_tls_get_addr |
9737e8af | 4623 | || !sec->nomark_tls_get_addr) |
b7fcf6f6 | 4624 | continue; |
25dbc73a | 4625 | |
3a71aa26 AM |
4626 | if (rel + 1 < relend |
4627 | && branch_reloc_hash_match (ibfd, rel + 1, | |
4628 | htab->tls_get_addr)) | |
4629 | continue; | |
25dbc73a | 4630 | |
b7fcf6f6 AM |
4631 | /* Uh oh, we didn't find the expected call. We |
4632 | could just mark this symbol to exclude it | |
4633 | from tls optimization but it's safer to skip | |
663a1470 | 4634 | the entire optimization. */ |
25f53a85 | 4635 | info->callbacks->minfo (_("%H arg lost __tls_get_addr, " |
663a1470 AM |
4636 | "TLS optimization disabled\n"), |
4637 | ibfd, sec, rel->r_offset); | |
4638 | if (elf_section_data (sec)->relocs != relstart) | |
4639 | free (relstart); | |
0a1b45a2 | 4640 | return true; |
b7fcf6f6 | 4641 | } |
25dbc73a | 4642 | |
b7fcf6f6 AM |
4643 | if (h != NULL) |
4644 | { | |
4645 | tls_mask = &ppc_elf_hash_entry (h)->tls_mask; | |
4646 | got_count = &h->got.refcount; | |
4647 | } | |
4648 | else | |
4649 | { | |
b7fcf6f6 | 4650 | bfd_signed_vma *lgot_refs; |
e054468f | 4651 | struct plt_entry **local_plt; |
bac3c8c5 | 4652 | unsigned char *lgot_masks; |
25dbc73a | 4653 | |
b7fcf6f6 AM |
4654 | lgot_refs = elf_local_got_refcounts (ibfd); |
4655 | if (lgot_refs == NULL) | |
4656 | abort (); | |
e054468f AM |
4657 | local_plt = (struct plt_entry **) |
4658 | (lgot_refs + symtab_hdr->sh_info); | |
bac3c8c5 AM |
4659 | lgot_masks = (unsigned char *) |
4660 | (local_plt + symtab_hdr->sh_info); | |
b7fcf6f6 AM |
4661 | tls_mask = &lgot_masks[r_symndx]; |
4662 | got_count = &lgot_refs[r_symndx]; | |
4663 | } | |
25dbc73a | 4664 | |
37da22e5 AM |
4665 | /* If we don't have old-style __tls_get_addr calls |
4666 | without TLSGD/TLSLD marker relocs, and we haven't | |
4667 | found a new-style __tls_get_addr call with a | |
4668 | marker for this symbol, then we either have a | |
4669 | broken object file or an -mlongcall style | |
4670 | indirect call to __tls_get_addr without a marker. | |
4671 | Disable optimization in this case. */ | |
4672 | if ((tls_clear & (TLS_GD | TLS_LD)) != 0 | |
9737e8af | 4673 | && !sec->nomark_tls_get_addr |
37da22e5 AM |
4674 | && ((*tls_mask & (TLS_TLS | TLS_MARK)) |
4675 | != (TLS_TLS | TLS_MARK))) | |
4676 | continue; | |
4677 | ||
7d04a20a | 4678 | if (expecting_tls_get_addr == 1 + !sec->nomark_tls_get_addr) |
37da22e5 AM |
4679 | { |
4680 | struct plt_entry *ent; | |
4681 | bfd_vma addend = 0; | |
4682 | ||
4683 | if (bfd_link_pic (info) | |
23cedd1d AM |
4684 | && (ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24 |
4685 | || ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTCALL)) | |
37da22e5 AM |
4686 | addend = rel[1].r_addend; |
4687 | ent = find_plt_ent (&htab->tls_get_addr->plt.plist, | |
4688 | got2, addend); | |
4689 | if (ent != NULL && ent->plt.refcount > 0) | |
4690 | ent->plt.refcount -= 1; | |
37da22e5 | 4691 | } |
7d04a20a AM |
4692 | if (tls_clear == 0) |
4693 | continue; | |
37da22e5 | 4694 | |
b7fcf6f6 AM |
4695 | if (tls_set == 0) |
4696 | { | |
4697 | /* We managed to get rid of a got entry. */ | |
4698 | if (*got_count > 0) | |
4699 | *got_count -= 1; | |
4700 | } | |
25dbc73a | 4701 | |
b7fcf6f6 AM |
4702 | *tls_mask |= tls_set; |
4703 | *tls_mask &= ~tls_clear; | |
4704 | } | |
25dbc73a | 4705 | |
b7fcf6f6 AM |
4706 | if (elf_section_data (sec)->relocs != relstart) |
4707 | free (relstart); | |
4708 | } | |
b7fcf6f6 | 4709 | } |
0a1b45a2 | 4710 | return true; |
25dbc73a AM |
4711 | } |
4712 | \f | |
287c7eaf AM |
4713 | /* Return true if we have dynamic relocs against H or any of its weak |
4714 | aliases, that apply to read-only sections. Cannot be used after | |
4715 | size_dynamic_sections. */ | |
4716 | ||
0a1b45a2 | 4717 | static bool |
287c7eaf AM |
4718 | alias_readonly_dynrelocs (struct elf_link_hash_entry *h) |
4719 | { | |
4720 | struct ppc_elf_link_hash_entry *eh = ppc_elf_hash_entry (h); | |
4721 | do | |
4722 | { | |
5dbc8b37 | 4723 | if (_bfd_elf_readonly_dynrelocs (&eh->elf)) |
0a1b45a2 | 4724 | return true; |
287c7eaf AM |
4725 | eh = ppc_elf_hash_entry (eh->elf.u.alias); |
4726 | } while (eh != NULL && &eh->elf != h); | |
4727 | ||
0a1b45a2 | 4728 | return false; |
287c7eaf AM |
4729 | } |
4730 | ||
4731 | /* Return whether H has pc-relative dynamic relocs. */ | |
4732 | ||
0a1b45a2 | 4733 | static bool |
287c7eaf AM |
4734 | pc_dynrelocs (struct elf_link_hash_entry *h) |
4735 | { | |
4736 | struct elf_dyn_relocs *p; | |
4737 | ||
190eb1dd | 4738 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
287c7eaf | 4739 | if (p->pc_count != 0) |
0a1b45a2 AM |
4740 | return true; |
4741 | return false; | |
287c7eaf AM |
4742 | } |
4743 | ||
25dbc73a AM |
4744 | /* Adjust a symbol defined by a dynamic object and referenced by a |
4745 | regular object. The current definition is in some section of the | |
4746 | dynamic object, but we're not including those sections. We have to | |
4747 | change the definition to something the rest of the link can | |
4748 | understand. */ | |
7fce784e | 4749 | |
0a1b45a2 | 4750 | static bool |
25dbc73a AM |
4751 | ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
4752 | struct elf_link_hash_entry *h) | |
4753 | { | |
4754 | struct ppc_elf_link_hash_table *htab; | |
4755 | asection *s; | |
7fce784e | 4756 | |
25dbc73a AM |
4757 | #ifdef DEBUG |
4758 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", | |
4759 | h->root.root.string); | |
4760 | #endif | |
252b5132 | 4761 | |
25dbc73a AM |
4762 | /* Make sure we know what is going on here. */ |
4763 | htab = ppc_elf_hash_table (info); | |
4764 | BFD_ASSERT (htab->elf.dynobj != NULL | |
4765 | && (h->needs_plt | |
91e21fb7 | 4766 | || h->type == STT_GNU_IFUNC |
60d67dc8 | 4767 | || h->is_weakalias |
25dbc73a AM |
4768 | || (h->def_dynamic |
4769 | && h->ref_regular | |
4770 | && !h->def_regular))); | |
252b5132 | 4771 | |
25dbc73a AM |
4772 | /* Deal with function syms. */ |
4773 | if (h->type == STT_FUNC | |
e054468f | 4774 | || h->type == STT_GNU_IFUNC |
25dbc73a AM |
4775 | || h->needs_plt) |
4776 | { | |
0a1b45a2 | 4777 | bool local = (SYMBOL_CALLS_LOCAL (info, h) |
529fe20e | 4778 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); |
287c7eaf AM |
4779 | /* Discard dyn_relocs when non-pic if we've decided that a |
4780 | function symbol is local. */ | |
4781 | if (!bfd_link_pic (info) && local) | |
190eb1dd | 4782 | h->dyn_relocs = NULL; |
529fe20e | 4783 | |
25dbc73a AM |
4784 | /* Clear procedure linkage table information for any symbol that |
4785 | won't need a .plt entry. */ | |
a6aa5195 AM |
4786 | struct plt_entry *ent; |
4787 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) | |
4788 | if (ent->plt.refcount > 0) | |
4789 | break; | |
4790 | if (ent == NULL | |
2d7ad24e AM |
4791 | || (h->type != STT_GNU_IFUNC |
4792 | && local | |
3e04d765 AM |
4793 | && (htab->can_convert_all_inline_plt |
4794 | || (ppc_elf_hash_entry (h)->tls_mask | |
4795 | & (TLS_TLS | PLT_KEEP)) != PLT_KEEP))) | |
252b5132 | 4796 | { |
25dbc73a | 4797 | /* A PLT entry is not required/allowed when: |
252b5132 | 4798 | |
25dbc73a AM |
4799 | 1. We are not using ld.so; because then the PLT entry |
4800 | can't be set up, so we can't use one. In this case, | |
4801 | ppc_elf_adjust_dynamic_symbol won't even be called. | |
252b5132 | 4802 | |
25dbc73a AM |
4803 | 2. GC has rendered the entry unused. |
4804 | ||
4805 | 3. We know for certain that a call to this symbol | |
4806 | will go to this object, or will remain undefined. */ | |
a6aa5195 | 4807 | h->plt.plist = NULL; |
25dbc73a | 4808 | h->needs_plt = 0; |
d1eca1e4 | 4809 | h->pointer_equality_needed = 0; |
25dbc73a | 4810 | } |
625af618 AM |
4811 | else |
4812 | { | |
d1eca1e4 AM |
4813 | /* Taking a function's address in a read/write section |
4814 | doesn't require us to define the function symbol in the | |
1009ef28 | 4815 | executable on a plt call stub. A dynamic reloc can |
f0158f44 AM |
4816 | be used instead, giving better runtime performance. |
4817 | (Calls via that function pointer don't need to bounce | |
4818 | through the plt call stub.) Similarly, use a dynamic | |
4819 | reloc for a weak reference when possible, allowing the | |
4820 | resolution of the symbol to be set at load time rather | |
4821 | than link time. */ | |
4822 | if ((h->pointer_equality_needed | |
3988aed5 AM |
4823 | || (h->non_got_ref |
4824 | && !h->ref_regular_nonweak | |
4825 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))) | |
90c14f0c | 4826 | && htab->elf.target_os != is_vxworks |
1009ef28 | 4827 | && !ppc_elf_hash_entry (h)->has_sda_refs |
5dbc8b37 | 4828 | && !_bfd_elf_readonly_dynrelocs (h)) |
d1eca1e4 AM |
4829 | { |
4830 | h->pointer_equality_needed = 0; | |
04383fd1 AM |
4831 | /* If we haven't seen a branch reloc and the symbol |
4832 | isn't an ifunc then we don't need a plt entry. */ | |
4833 | if (!h->needs_plt && h->type != STT_GNU_IFUNC) | |
3988aed5 | 4834 | h->plt.plist = NULL; |
d1eca1e4 | 4835 | } |
287c7eaf | 4836 | else if (!bfd_link_pic (info)) |
529fe20e AM |
4837 | /* We are going to be defining the function symbol on the |
4838 | plt stub, so no dyn_relocs needed when non-pic. */ | |
190eb1dd | 4839 | h->dyn_relocs = NULL; |
625af618 | 4840 | } |
d3e454b9 | 4841 | h->protected_def = 0; |
3988aed5 | 4842 | /* Function symbols can't have copy relocs. */ |
0a1b45a2 | 4843 | return true; |
252b5132 | 4844 | } |
25dbc73a | 4845 | else |
a6aa5195 | 4846 | h->plt.plist = NULL; |
252b5132 | 4847 | |
25dbc73a AM |
4848 | /* If this is a weak symbol, and there is a real definition, the |
4849 | processor independent code will have arranged for us to see the | |
4850 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 4851 | if (h->is_weakalias) |
252b5132 | 4852 | { |
60d67dc8 AM |
4853 | struct elf_link_hash_entry *def = weakdef (h); |
4854 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
4855 | h->root.u.def.section = def->root.u.def.section; | |
4856 | h->root.u.def.value = def->root.u.def.value; | |
4a7e5234 AM |
4857 | if (def->root.u.def.section == htab->elf.sdynbss |
4858 | || def->root.u.def.section == htab->elf.sdynrelro | |
4859 | || def->root.u.def.section == htab->dynsbss) | |
190eb1dd | 4860 | h->dyn_relocs = NULL; |
0a1b45a2 | 4861 | return true; |
25dbc73a | 4862 | } |
dc810e39 | 4863 | |
25dbc73a AM |
4864 | /* This is a reference to a symbol defined by a dynamic object which |
4865 | is not a function. */ | |
252b5132 | 4866 | |
25dbc73a AM |
4867 | /* If we are creating a shared library, we must presume that the |
4868 | only references to the symbol are via the global offset table. | |
4869 | For such cases we need not do anything here; the relocations will | |
4870 | be handled correctly by relocate_section. */ | |
0e1862bb | 4871 | if (bfd_link_pic (info)) |
d3e454b9 AM |
4872 | { |
4873 | h->protected_def = 0; | |
0a1b45a2 | 4874 | return true; |
d3e454b9 | 4875 | } |
252b5132 | 4876 | |
25dbc73a AM |
4877 | /* If there are no references to this symbol that do not use the |
4878 | GOT, we don't need to generate a copy reloc. */ | |
4879 | if (!h->non_got_ref) | |
d3e454b9 AM |
4880 | { |
4881 | h->protected_def = 0; | |
0a1b45a2 | 4882 | return true; |
d3e454b9 AM |
4883 | } |
4884 | ||
4885 | /* Protected variables do not work with .dynbss. The copy in | |
4886 | .dynbss won't be used by the shared library with the protected | |
4887 | definition for the variable. Editing to PIC, or text relocations | |
4888 | are preferable to an incorrect program. */ | |
4889 | if (h->protected_def) | |
4890 | { | |
4891 | if (ELIMINATE_COPY_RELOCS | |
4892 | && ppc_elf_hash_entry (h)->has_addr16_ha | |
4893 | && ppc_elf_hash_entry (h)->has_addr16_lo | |
4894 | && htab->params->pic_fixup == 0 | |
4895 | && info->disable_target_specific_optimizations <= 1) | |
4896 | htab->params->pic_fixup = 1; | |
0a1b45a2 | 4897 | return true; |
d3e454b9 | 4898 | } |
25dbc73a | 4899 | |
a127494f AM |
4900 | /* If -z nocopyreloc was given, we won't generate them either. */ |
4901 | if (info->nocopyreloc) | |
0a1b45a2 | 4902 | return true; |
a127494f | 4903 | |
dce2246a | 4904 | /* If we don't find any dynamic relocs in read-only sections, then |
cfd2c773 NS |
4905 | we'll be keeping the dynamic relocs and avoiding the copy reloc. |
4906 | We can't do this if there are any small data relocations. This | |
4907 | doesn't work on VxWorks, where we can not have dynamic | |
4908 | relocations (other than copy and jump slot relocations) in an | |
4909 | executable. */ | |
4dc4a9a5 | 4910 | if (ELIMINATE_COPY_RELOCS |
cfd2c773 | 4911 | && !ppc_elf_hash_entry (h)->has_sda_refs |
90c14f0c | 4912 | && htab->elf.target_os != is_vxworks |
625af618 | 4913 | && !h->def_regular |
287c7eaf | 4914 | && !alias_readonly_dynrelocs (h)) |
0a1b45a2 | 4915 | return true; |
252b5132 | 4916 | |
25dbc73a AM |
4917 | /* We must allocate the symbol in our .dynbss section, which will |
4918 | become part of the .bss section of the executable. There will be | |
4919 | an entry for this symbol in the .dynsym section. The dynamic | |
4920 | object will contain position independent code, so all references | |
4921 | from the dynamic object to this symbol will go through the global | |
4922 | offset table. The dynamic linker will use the .dynsym entry to | |
4923 | determine the address it must put in the global offset table, so | |
4924 | both the dynamic object and the regular object will refer to the | |
4925 | same memory location for the variable. | |
4926 | ||
4dc4a9a5 DJ |
4927 | Of course, if the symbol is referenced using SDAREL relocs, we |
4928 | must instead allocate it in .sbss. */ | |
4dc4a9a5 | 4929 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
25dbc73a | 4930 | s = htab->dynsbss; |
5474d94f AM |
4931 | else if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
4932 | s = htab->elf.sdynrelro; | |
25dbc73a | 4933 | else |
9d19e4fd | 4934 | s = htab->elf.sdynbss; |
25dbc73a AM |
4935 | BFD_ASSERT (s != NULL); |
4936 | ||
1d7e9d18 | 4937 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
25dbc73a AM |
4938 | { |
4939 | asection *srel; | |
4940 | ||
4a7e5234 AM |
4941 | /* We must generate a R_PPC_COPY reloc to tell the dynamic |
4942 | linker to copy the initial value out of the dynamic object | |
4943 | and into the runtime process image. */ | |
4dc4a9a5 | 4944 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
25dbc73a | 4945 | srel = htab->relsbss; |
5474d94f AM |
4946 | else if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
4947 | srel = htab->elf.sreldynrelro; | |
25dbc73a | 4948 | else |
9d19e4fd | 4949 | srel = htab->elf.srelbss; |
25dbc73a AM |
4950 | BFD_ASSERT (srel != NULL); |
4951 | srel->size += sizeof (Elf32_External_Rela); | |
4952 | h->needs_copy = 1; | |
4953 | } | |
7619e7c7 | 4954 | |
529fe20e | 4955 | /* We no longer want dyn_relocs. */ |
190eb1dd | 4956 | h->dyn_relocs = NULL; |
6cabe1ea | 4957 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
25dbc73a AM |
4958 | } |
4959 | \f | |
ac39eb42 AM |
4960 | /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is |
4961 | xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, | |
4962 | specifying the addend on the plt relocation. For -fpic code, the sym | |
4963 | is xxxxxxxx.plt_pic32.<callee>, and for -fPIC | |
4964 | xxxxxxxx.got2.plt_pic32.<callee>. */ | |
0ba07910 | 4965 | |
0a1b45a2 | 4966 | static bool |
0ba07910 AM |
4967 | add_stub_sym (struct plt_entry *ent, |
4968 | struct elf_link_hash_entry *h, | |
ac39eb42 | 4969 | struct bfd_link_info *info) |
0ba07910 AM |
4970 | { |
4971 | struct elf_link_hash_entry *sh; | |
4972 | size_t len1, len2, len3; | |
4973 | char *name; | |
ac39eb42 AM |
4974 | const char *stub; |
4975 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); | |
4976 | ||
0e1862bb | 4977 | if (bfd_link_pic (info)) |
ac39eb42 AM |
4978 | stub = ".plt_pic32."; |
4979 | else | |
4980 | stub = ".plt_call32."; | |
0ba07910 AM |
4981 | |
4982 | len1 = strlen (h->root.root.string); | |
ac39eb42 | 4983 | len2 = strlen (stub); |
0ba07910 AM |
4984 | len3 = 0; |
4985 | if (ent->sec) | |
4986 | len3 = strlen (ent->sec->name); | |
ac39eb42 | 4987 | name = bfd_malloc (len1 + len2 + len3 + 9); |
0ba07910 | 4988 | if (name == NULL) |
0a1b45a2 | 4989 | return false; |
0ba07910 AM |
4990 | sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); |
4991 | if (ent->sec) | |
4992 | memcpy (name + 8, ent->sec->name, len3); | |
ac39eb42 AM |
4993 | memcpy (name + 8 + len3, stub, len2); |
4994 | memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); | |
0a1b45a2 | 4995 | sh = elf_link_hash_lookup (&htab->elf, name, true, false, false); |
0ba07910 | 4996 | if (sh == NULL) |
0a1b45a2 | 4997 | return false; |
0ba07910 AM |
4998 | if (sh->root.type == bfd_link_hash_new) |
4999 | { | |
5000 | sh->root.type = bfd_link_hash_defined; | |
5001 | sh->root.u.def.section = htab->glink; | |
5002 | sh->root.u.def.value = ent->glink_offset; | |
5003 | sh->ref_regular = 1; | |
5004 | sh->def_regular = 1; | |
5005 | sh->ref_regular_nonweak = 1; | |
5006 | sh->forced_local = 1; | |
5007 | sh->non_elf = 0; | |
2ec55de3 | 5008 | sh->root.linker_def = 1; |
0ba07910 | 5009 | } |
0a1b45a2 | 5010 | return true; |
0ba07910 AM |
5011 | } |
5012 | ||
3b36f7e6 AM |
5013 | /* Allocate NEED contiguous space in .got, and return the offset. |
5014 | Handles allocation of the got header when crossing 32k. */ | |
5015 | ||
5016 | static bfd_vma | |
5017 | allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) | |
5018 | { | |
5019 | bfd_vma where; | |
4a3dc543 | 5020 | unsigned int max_before_header; |
3b36f7e6 | 5021 | |
4a3dc543 | 5022 | if (htab->plt_type == PLT_VXWORKS) |
9d8504b1 | 5023 | { |
ce558b89 AM |
5024 | where = htab->elf.sgot->size; |
5025 | htab->elf.sgot->size += need; | |
9d8504b1 | 5026 | } |
3b36f7e6 AM |
5027 | else |
5028 | { | |
4a3dc543 RS |
5029 | max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; |
5030 | if (need <= htab->got_gap) | |
3b36f7e6 | 5031 | { |
4a3dc543 RS |
5032 | where = max_before_header - htab->got_gap; |
5033 | htab->got_gap -= need; | |
5034 | } | |
5035 | else | |
5036 | { | |
ce558b89 AM |
5037 | if (htab->elf.sgot->size + need > max_before_header |
5038 | && htab->elf.sgot->size <= max_before_header) | |
4a3dc543 | 5039 | { |
ce558b89 AM |
5040 | htab->got_gap = max_before_header - htab->elf.sgot->size; |
5041 | htab->elf.sgot->size = max_before_header + htab->got_header_size; | |
4a3dc543 | 5042 | } |
ce558b89 AM |
5043 | where = htab->elf.sgot->size; |
5044 | htab->elf.sgot->size += need; | |
3b36f7e6 | 5045 | } |
3b36f7e6 AM |
5046 | } |
5047 | return where; | |
5048 | } | |
5049 | ||
f15d0b54 AM |
5050 | /* Calculate size of GOT entries for symbol given its TLS_MASK. |
5051 | TLS_LD is excluded because those go in a special GOT slot. */ | |
5052 | ||
5053 | static inline unsigned int | |
5054 | got_entries_needed (int tls_mask) | |
5055 | { | |
5056 | unsigned int need; | |
5057 | if ((tls_mask & TLS_TLS) == 0) | |
5058 | need = 4; | |
5059 | else | |
5060 | { | |
5061 | need = 0; | |
5062 | if ((tls_mask & TLS_GD) != 0) | |
5063 | need += 8; | |
b00a0a86 | 5064 | if ((tls_mask & (TLS_TPREL | TLS_GDIE)) != 0) |
f15d0b54 AM |
5065 | need += 4; |
5066 | if ((tls_mask & TLS_DTPREL) != 0) | |
5067 | need += 4; | |
5068 | } | |
5069 | return need; | |
5070 | } | |
5071 | ||
46434633 | 5072 | /* If H is undefined, make it dynamic if that makes sense. */ |
f0158f44 | 5073 | |
0a1b45a2 | 5074 | static bool |
46434633 AM |
5075 | ensure_undef_dynamic (struct bfd_link_info *info, |
5076 | struct elf_link_hash_entry *h) | |
f0158f44 AM |
5077 | { |
5078 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
5079 | ||
5080 | if (htab->dynamic_sections_created | |
46434633 AM |
5081 | && ((info->dynamic_undefined_weak != 0 |
5082 | && h->root.type == bfd_link_hash_undefweak) | |
5083 | || h->root.type == bfd_link_hash_undefined) | |
f0158f44 AM |
5084 | && h->dynindx == -1 |
5085 | && !h->forced_local | |
5086 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
5087 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
0a1b45a2 | 5088 | return true; |
f0158f44 AM |
5089 | } |
5090 | ||
30845f11 AM |
5091 | /* Choose whether to use htab->iplt or htab->pltlocal rather than the |
5092 | usual htab->elf.splt section for a PLT entry. */ | |
5093 | ||
5094 | static inline | |
0a1b45a2 | 5095 | bool use_local_plt (struct bfd_link_info *info, |
30845f11 AM |
5096 | struct elf_link_hash_entry *h) |
5097 | { | |
5098 | return (h == NULL | |
5099 | || h->dynindx == -1 | |
5100 | || !elf_hash_table (info)->dynamic_sections_created); | |
5101 | } | |
5102 | ||
25dbc73a | 5103 | /* Allocate space in associated reloc sections for dynamic relocs. */ |
252b5132 | 5104 | |
0a1b45a2 | 5105 | static bool |
25dbc73a | 5106 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
252b5132 | 5107 | { |
25dbc73a AM |
5108 | struct bfd_link_info *info = inf; |
5109 | struct ppc_elf_link_hash_entry *eh; | |
7619e7c7 | 5110 | struct ppc_elf_link_hash_table *htab; |
6061a67d | 5111 | struct elf_dyn_relocs *p; |
252b5132 | 5112 | |
25dbc73a | 5113 | if (h->root.type == bfd_link_hash_indirect) |
0a1b45a2 | 5114 | return true; |
252b5132 | 5115 | |
7619e7c7 | 5116 | htab = ppc_elf_hash_table (info); |
25dbc73a | 5117 | eh = (struct ppc_elf_link_hash_entry *) h; |
d3e454b9 AM |
5118 | if (eh->elf.got.refcount > 0 |
5119 | || (ELIMINATE_COPY_RELOCS | |
5120 | && !eh->elf.def_regular | |
5121 | && eh->elf.protected_def | |
5122 | && eh->has_addr16_ha | |
5123 | && eh->has_addr16_lo | |
5124 | && htab->params->pic_fixup > 0)) | |
25dbc73a | 5125 | { |
d6e14abc AM |
5126 | unsigned int need; |
5127 | ||
46434633 AM |
5128 | /* Make sure this symbol is output as a dynamic symbol. */ |
5129 | if (!ensure_undef_dynamic (info, &eh->elf)) | |
0a1b45a2 | 5130 | return false; |
252b5132 | 5131 | |
d6e14abc | 5132 | need = 0; |
37da22e5 | 5133 | if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)) |
25dbc73a | 5134 | { |
f749f26e | 5135 | if (SYMBOL_REFERENCES_LOCAL (info, &eh->elf)) |
f15d0b54 AM |
5136 | /* We'll just use htab->tlsld_got.offset. This should |
5137 | always be the case. It's a little odd if we have | |
5138 | a local dynamic reloc against a non-local symbol. */ | |
5139 | htab->tlsld_got.refcount += 1; | |
5140 | else | |
d6e14abc | 5141 | need += 8; |
d6e14abc | 5142 | } |
f15d0b54 | 5143 | need += got_entries_needed (eh->tls_mask); |
d6e14abc AM |
5144 | if (need == 0) |
5145 | eh->elf.got.offset = (bfd_vma) -1; | |
5146 | else | |
5147 | { | |
3b36f7e6 | 5148 | eh->elf.got.offset = allocate_got (htab, need); |
f749f26e AM |
5149 | if (((bfd_link_pic (info) |
5150 | && !((eh->tls_mask & TLS_TLS) != 0 | |
5151 | && bfd_link_executable (info) | |
7a9361c0 AM |
5152 | && SYMBOL_REFERENCES_LOCAL (info, &eh->elf)) |
5153 | && !bfd_is_abs_symbol (&h->root)) | |
f0158f44 AM |
5154 | || (htab->elf.dynamic_sections_created |
5155 | && eh->elf.dynindx != -1 | |
5156 | && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf))) | |
21d68fcd | 5157 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf)) |
252b5132 | 5158 | { |
f15d0b54 | 5159 | asection *rsec; |
f15d0b54 | 5160 | |
f749f26e AM |
5161 | need *= sizeof (Elf32_External_Rela) / 4; |
5162 | if ((eh->tls_mask & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)) | |
f15d0b54 AM |
5163 | need -= sizeof (Elf32_External_Rela); |
5164 | rsec = htab->elf.srelgot; | |
0bed072f | 5165 | if (eh->elf.type == STT_GNU_IFUNC) |
ce558b89 | 5166 | rsec = htab->elf.irelplt; |
f15d0b54 | 5167 | rsec->size += need; |
252b5132 | 5168 | } |
25dbc73a AM |
5169 | } |
5170 | } | |
5171 | else | |
5172 | eh->elf.got.offset = (bfd_vma) -1; | |
252b5132 | 5173 | |
954b63d4 AM |
5174 | /* If no dynamic sections we can't have dynamic relocs, except for |
5175 | IFUNCs which are handled even in static executables. */ | |
f0158f44 AM |
5176 | if (!htab->elf.dynamic_sections_created |
5177 | && h->type != STT_GNU_IFUNC) | |
190eb1dd | 5178 | h->dyn_relocs = NULL; |
f0158f44 | 5179 | |
529fe20e AM |
5180 | /* Discard relocs on undefined symbols that must be local. */ |
5181 | else if (h->root.type == bfd_link_hash_undefined | |
5182 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
190eb1dd | 5183 | h->dyn_relocs = NULL; |
529fe20e AM |
5184 | |
5185 | /* Also discard relocs on undefined weak syms with non-default | |
5186 | visibility, or when dynamic_undefined_weak says so. */ | |
5187 | else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
190eb1dd | 5188 | h->dyn_relocs = NULL; |
529fe20e | 5189 | |
190eb1dd | 5190 | if (h->dyn_relocs == NULL) |
287c7eaf | 5191 | ; |
252b5132 | 5192 | |
25dbc73a AM |
5193 | /* In the shared -Bsymbolic case, discard space allocated for |
5194 | dynamic pc-relative relocs against symbols which turn out to be | |
5195 | defined in regular objects. For the normal shared case, discard | |
5196 | space for relocs that have become local due to symbol visibility | |
5197 | changes. */ | |
f0158f44 | 5198 | else if (bfd_link_pic (info)) |
25dbc73a AM |
5199 | { |
5200 | /* Relocs that use pc_count are those that appear on a call insn, | |
1d483afe | 5201 | or certain REL relocs (see must_be_dyn_reloc) that can be |
25dbc73a AM |
5202 | generated via assembly. We want calls to protected symbols to |
5203 | resolve directly to the function rather than going via the plt. | |
5204 | If people want function pointer comparisons to work as expected | |
5205 | then they should avoid writing weird assembly. */ | |
529fe20e | 5206 | if (SYMBOL_CALLS_LOCAL (info, h)) |
25dbc73a | 5207 | { |
6061a67d | 5208 | struct elf_dyn_relocs **pp; |
25dbc73a | 5209 | |
190eb1dd | 5210 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
252b5132 | 5211 | { |
25dbc73a AM |
5212 | p->count -= p->pc_count; |
5213 | p->pc_count = 0; | |
5214 | if (p->count == 0) | |
5215 | *pp = p->next; | |
5216 | else | |
5217 | pp = &p->next; | |
252b5132 | 5218 | } |
25dbc73a | 5219 | } |
252b5132 | 5220 | |
90c14f0c | 5221 | if (htab->elf.target_os == is_vxworks) |
3348747a | 5222 | { |
6061a67d | 5223 | struct elf_dyn_relocs **pp; |
3348747a | 5224 | |
190eb1dd | 5225 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
3348747a NS |
5226 | { |
5227 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
5228 | *pp = p->next; | |
5229 | else | |
5230 | pp = &p->next; | |
5231 | } | |
5232 | } | |
5233 | ||
190eb1dd | 5234 | if (h->dyn_relocs != NULL) |
25dbc73a | 5235 | { |
46434633 AM |
5236 | /* Make sure this symbol is output as a dynamic symbol. */ |
5237 | if (!ensure_undef_dynamic (info, h)) | |
0a1b45a2 | 5238 | return false; |
25dbc73a AM |
5239 | } |
5240 | } | |
5241 | else if (ELIMINATE_COPY_RELOCS) | |
5242 | { | |
f0158f44 | 5243 | /* For the non-pic case, discard space for relocs against |
25dbc73a AM |
5244 | symbols which turn out to need copy relocs or are not |
5245 | dynamic. */ | |
49160308 AM |
5246 | if ((h->dynamic_adjusted |
5247 | || (h->ref_regular | |
5248 | && h->root.type == bfd_link_hash_undefweak | |
5249 | && (info->dynamic_undefined_weak > 0 | |
5250 | || !_bfd_elf_readonly_dynrelocs (h)))) | |
d3e454b9 | 5251 | && !h->def_regular |
529fe20e | 5252 | && !ELF_COMMON_DEF_P (h) |
d3e454b9 AM |
5253 | && !(h->protected_def |
5254 | && eh->has_addr16_ha | |
5255 | && eh->has_addr16_lo | |
5256 | && htab->params->pic_fixup > 0)) | |
25dbc73a | 5257 | { |
46434633 AM |
5258 | /* Make sure this symbol is output as a dynamic symbol. */ |
5259 | if (!ensure_undef_dynamic (info, h)) | |
0a1b45a2 | 5260 | return false; |
7619e7c7 | 5261 | |
f0158f44 | 5262 | if (h->dynindx == -1) |
190eb1dd | 5263 | h->dyn_relocs = NULL; |
25dbc73a | 5264 | } |
f0158f44 | 5265 | else |
190eb1dd | 5266 | h->dyn_relocs = NULL; |
25dbc73a | 5267 | } |
252b5132 | 5268 | |
f0158f44 | 5269 | /* Allocate space. */ |
190eb1dd | 5270 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
365bf300 AM |
5271 | if (!discarded_section (p->sec)) |
5272 | { | |
5273 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
5274 | if (eh->elf.type == STT_GNU_IFUNC) | |
5275 | sreloc = htab->elf.irelplt; | |
5276 | sreloc->size += p->count * sizeof (Elf32_External_Rela); | |
5277 | } | |
252b5132 | 5278 | |
2d7ad24e AM |
5279 | /* Handle PLT relocs. Done last, after dynindx has settled. |
5280 | We might need a PLT entry when the symbol | |
5281 | a) is dynamic, or | |
5282 | b) is an ifunc, or | |
5283 | c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or | |
5284 | d) has plt16 relocs and we are linking statically. */ | |
30845f11 | 5285 | if ((htab->elf.dynamic_sections_created && h->dynindx != -1) |
2d7ad24e AM |
5286 | || h->type == STT_GNU_IFUNC |
5287 | || (h->needs_plt && h->dynamic_adjusted) | |
5288 | || (h->needs_plt | |
5289 | && h->def_regular | |
5290 | && !htab->elf.dynamic_sections_created | |
3e04d765 | 5291 | && !htab->can_convert_all_inline_plt |
2d7ad24e AM |
5292 | && (ppc_elf_hash_entry (h)->tls_mask |
5293 | & (TLS_TLS | PLT_KEEP)) == PLT_KEEP)) | |
f0158f44 AM |
5294 | { |
5295 | struct plt_entry *ent; | |
0a1b45a2 | 5296 | bool doneone = false; |
2d7ad24e | 5297 | bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1; |
f0158f44 AM |
5298 | |
5299 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) | |
5300 | if (ent->plt.refcount > 0) | |
5301 | { | |
b2936612 AM |
5302 | asection *s; |
5303 | bool dyn; | |
f0158f44 | 5304 | |
b2936612 AM |
5305 | if (!ensure_undef_dynamic (info, h)) |
5306 | return false; | |
5307 | ||
5308 | dyn = !use_local_plt (info, h); | |
5309 | s = htab->elf.splt; | |
f0158f44 | 5310 | if (!dyn) |
2d7ad24e AM |
5311 | { |
5312 | if (h->type == STT_GNU_IFUNC) | |
5313 | s = htab->elf.iplt; | |
5314 | else | |
5315 | s = htab->pltlocal; | |
5316 | } | |
f0158f44 AM |
5317 | |
5318 | if (htab->plt_type == PLT_NEW || !dyn) | |
5319 | { | |
5320 | if (!doneone) | |
5321 | { | |
5322 | plt_offset = s->size; | |
5323 | s->size += 4; | |
5324 | } | |
5325 | ent->plt.offset = plt_offset; | |
5326 | ||
2d7ad24e AM |
5327 | if (s == htab->pltlocal) |
5328 | ent->glink_offset = glink_offset; | |
5329 | else | |
f0158f44 | 5330 | { |
2d7ad24e AM |
5331 | s = htab->glink; |
5332 | if (!doneone || bfd_link_pic (info)) | |
5333 | { | |
5334 | glink_offset = s->size; | |
5335 | s->size += GLINK_ENTRY_SIZE (htab, h); | |
5336 | } | |
5337 | if (!doneone | |
5338 | && !bfd_link_pic (info) | |
5339 | && h->def_dynamic | |
5340 | && !h->def_regular) | |
5341 | { | |
5342 | h->root.u.def.section = s; | |
5343 | h->root.u.def.value = glink_offset; | |
5344 | } | |
5345 | ent->glink_offset = glink_offset; | |
f0158f44 | 5346 | |
2d7ad24e AM |
5347 | if (htab->params->emit_stub_syms |
5348 | && !add_stub_sym (ent, h, info)) | |
0a1b45a2 | 5349 | return false; |
2d7ad24e | 5350 | } |
f0158f44 AM |
5351 | } |
5352 | else | |
5353 | { | |
5354 | if (!doneone) | |
5355 | { | |
5356 | /* If this is the first .plt entry, make room | |
5357 | for the special first entry. */ | |
5358 | if (s->size == 0) | |
5359 | s->size += htab->plt_initial_entry_size; | |
5360 | ||
5361 | /* The PowerPC PLT is actually composed of two | |
5362 | parts, the first part is 2 words (for a load | |
5363 | and a jump), and then there is a remaining | |
5364 | word available at the end. */ | |
5365 | plt_offset = (htab->plt_initial_entry_size | |
5366 | + (htab->plt_slot_size | |
5367 | * ((s->size | |
5368 | - htab->plt_initial_entry_size) | |
5369 | / htab->plt_entry_size))); | |
5370 | ||
5371 | /* If this symbol is not defined in a regular | |
5372 | file, and we are not generating a shared | |
5373 | library, then set the symbol to this location | |
5374 | in the .plt. This is to avoid text | |
5375 | relocations, and is required to make | |
5376 | function pointers compare as equal between | |
5377 | the normal executable and the shared library. */ | |
5378 | if (! bfd_link_pic (info) | |
5379 | && h->def_dynamic | |
5380 | && !h->def_regular) | |
5381 | { | |
5382 | h->root.u.def.section = s; | |
5383 | h->root.u.def.value = plt_offset; | |
5384 | } | |
5385 | ||
5386 | /* Make room for this entry. */ | |
5387 | s->size += htab->plt_entry_size; | |
5388 | /* After the 8192nd entry, room for two entries | |
5389 | is allocated. */ | |
5390 | if (htab->plt_type == PLT_OLD | |
5391 | && (s->size - htab->plt_initial_entry_size) | |
5392 | / htab->plt_entry_size | |
5393 | > PLT_NUM_SINGLE_ENTRIES) | |
5394 | s->size += htab->plt_entry_size; | |
5395 | } | |
5396 | ent->plt.offset = plt_offset; | |
5397 | } | |
5398 | ||
5399 | /* We also need to make an entry in the .rela.plt section. */ | |
5400 | if (!doneone) | |
5401 | { | |
5402 | if (!dyn) | |
2d7ad24e AM |
5403 | { |
5404 | if (h->type == STT_GNU_IFUNC) | |
5405 | { | |
5406 | s = htab->elf.irelplt; | |
5407 | s->size += sizeof (Elf32_External_Rela); | |
5408 | } | |
5409 | else if (bfd_link_pic (info)) | |
5410 | { | |
5411 | s = htab->relpltlocal; | |
5412 | s->size += sizeof (Elf32_External_Rela); | |
5413 | } | |
5414 | } | |
f0158f44 AM |
5415 | else |
5416 | { | |
5417 | htab->elf.srelplt->size += sizeof (Elf32_External_Rela); | |
5418 | ||
5419 | if (htab->plt_type == PLT_VXWORKS) | |
5420 | { | |
5421 | /* Allocate space for the unloaded relocations. */ | |
5422 | if (!bfd_link_pic (info) | |
5423 | && htab->elf.dynamic_sections_created) | |
5424 | { | |
5425 | if (ent->plt.offset | |
5426 | == (bfd_vma) htab->plt_initial_entry_size) | |
5427 | { | |
5428 | htab->srelplt2->size | |
5429 | += (sizeof (Elf32_External_Rela) | |
5430 | * VXWORKS_PLTRESOLVE_RELOCS); | |
5431 | } | |
5432 | ||
5433 | htab->srelplt2->size | |
5434 | += (sizeof (Elf32_External_Rela) | |
5435 | * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); | |
5436 | } | |
5437 | ||
5438 | /* Every PLT entry has an associated GOT entry in | |
5439 | .got.plt. */ | |
5440 | htab->elf.sgotplt->size += 4; | |
5441 | } | |
5442 | } | |
0a1b45a2 | 5443 | doneone = true; |
f0158f44 AM |
5444 | } |
5445 | } | |
5446 | else | |
5447 | ent->plt.offset = (bfd_vma) -1; | |
5448 | ||
5449 | if (!doneone) | |
5450 | { | |
5451 | h->plt.plist = NULL; | |
5452 | h->needs_plt = 0; | |
5453 | } | |
5454 | } | |
5455 | else | |
5456 | { | |
5457 | h->plt.plist = NULL; | |
5458 | h->needs_plt = 0; | |
5459 | } | |
5460 | ||
0a1b45a2 | 5461 | return true; |
25dbc73a | 5462 | } |
7619e7c7 | 5463 | |
6177242a AM |
5464 | static const unsigned char glink_eh_frame_cie[] = |
5465 | { | |
5466 | 0, 0, 0, 16, /* length. */ | |
5467 | 0, 0, 0, 0, /* id. */ | |
5468 | 1, /* CIE version. */ | |
5469 | 'z', 'R', 0, /* Augmentation string. */ | |
5470 | 4, /* Code alignment. */ | |
5471 | 0x7c, /* Data alignment. */ | |
5472 | 65, /* RA reg. */ | |
5473 | 1, /* Augmentation size. */ | |
5474 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ | |
5475 | DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ | |
5476 | }; | |
5477 | ||
25dbc73a AM |
5478 | /* Set the sizes of the dynamic sections. */ |
5479 | ||
0a1b45a2 | 5480 | static bool |
93d1b056 | 5481 | ppc_elf_size_dynamic_sections (bfd *output_bfd, |
25dbc73a AM |
5482 | struct bfd_link_info *info) |
5483 | { | |
5484 | struct ppc_elf_link_hash_table *htab; | |
5485 | asection *s; | |
0a1b45a2 | 5486 | bool relocs; |
25dbc73a | 5487 | bfd *ibfd; |
7fce784e | 5488 | |
252b5132 | 5489 | #ifdef DEBUG |
25dbc73a | 5490 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
252b5132 | 5491 | #endif |
252b5132 | 5492 | |
25dbc73a AM |
5493 | htab = ppc_elf_hash_table (info); |
5494 | BFD_ASSERT (htab->elf.dynobj != NULL); | |
252b5132 | 5495 | |
25dbc73a AM |
5496 | if (elf_hash_table (info)->dynamic_sections_created) |
5497 | { | |
5498 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 5499 | if (bfd_link_executable (info) && !info->nointerp) |
25dbc73a | 5500 | { |
3d4d4302 | 5501 | s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); |
25dbc73a AM |
5502 | BFD_ASSERT (s != NULL); |
5503 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
5504 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
5505 | } | |
5506 | } | |
252b5132 | 5507 | |
4a3dc543 | 5508 | if (htab->plt_type == PLT_OLD) |
d7128ce4 | 5509 | htab->got_header_size = 16; |
4a3dc543 | 5510 | else if (htab->plt_type == PLT_NEW) |
d7128ce4 | 5511 | htab->got_header_size = 12; |
252b5132 | 5512 | |
25dbc73a AM |
5513 | /* Set up .got offsets for local syms, and space for local dynamic |
5514 | relocs. */ | |
c72f2fb2 | 5515 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
25dbc73a AM |
5516 | { |
5517 | bfd_signed_vma *local_got; | |
5518 | bfd_signed_vma *end_local_got; | |
e054468f AM |
5519 | struct plt_entry **local_plt; |
5520 | struct plt_entry **end_local_plt; | |
25dbc73a AM |
5521 | char *lgot_masks; |
5522 | bfd_size_type locsymcount; | |
5523 | Elf_Internal_Shdr *symtab_hdr; | |
7a9361c0 AM |
5524 | Elf_Internal_Sym *local_syms; |
5525 | Elf_Internal_Sym *isym; | |
7fce784e | 5526 | |
0c8d6e5c | 5527 | if (!is_ppc_elf (ibfd)) |
25dbc73a | 5528 | continue; |
7fce784e | 5529 | |
25dbc73a AM |
5530 | for (s = ibfd->sections; s != NULL; s = s->next) |
5531 | { | |
f95f8542 | 5532 | struct ppc_dyn_relocs *p; |
252b5132 | 5533 | |
f95f8542 | 5534 | for (p = ((struct ppc_dyn_relocs *) |
25dbc73a AM |
5535 | elf_section_data (s)->local_dynrel); |
5536 | p != NULL; | |
5537 | p = p->next) | |
5538 | { | |
365bf300 | 5539 | if (discarded_section (p->sec)) |
25dbc73a AM |
5540 | { |
5541 | /* Input section has been discarded, either because | |
5542 | it is a copy of a linkonce section or due to | |
5543 | linker script /DISCARD/, so we'll be discarding | |
5544 | the relocs too. */ | |
7fce784e | 5545 | } |
90c14f0c | 5546 | else if (htab->elf.target_os == is_vxworks |
3348747a NS |
5547 | && strcmp (p->sec->output_section->name, |
5548 | ".tls_vars") == 0) | |
5549 | { | |
5550 | /* Relocations in vxworks .tls_vars sections are | |
5551 | handled specially by the loader. */ | |
5552 | } | |
25dbc73a | 5553 | else if (p->count != 0) |
7fce784e | 5554 | { |
25f23106 | 5555 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
f95f8542 | 5556 | if (p->ifunc) |
ce558b89 | 5557 | sreloc = htab->elf.irelplt; |
25f23106 | 5558 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
25dbc73a AM |
5559 | if ((p->sec->output_section->flags |
5560 | & (SEC_READONLY | SEC_ALLOC)) | |
5561 | == (SEC_READONLY | SEC_ALLOC)) | |
0caf6c82 L |
5562 | { |
5563 | info->flags |= DF_TEXTREL; | |
871b3ab2 | 5564 | info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"), |
0caf6c82 L |
5565 | p->sec->owner, p->sec); |
5566 | } | |
7fce784e | 5567 | } |
252b5132 | 5568 | } |
252b5132 | 5569 | } |
252b5132 | 5570 | |
25dbc73a AM |
5571 | local_got = elf_local_got_refcounts (ibfd); |
5572 | if (!local_got) | |
5573 | continue; | |
252b5132 | 5574 | |
0ffa91dd | 5575 | symtab_hdr = &elf_symtab_hdr (ibfd); |
25dbc73a AM |
5576 | locsymcount = symtab_hdr->sh_info; |
5577 | end_local_got = local_got + locsymcount; | |
e054468f AM |
5578 | local_plt = (struct plt_entry **) end_local_got; |
5579 | end_local_plt = local_plt + locsymcount; | |
5580 | lgot_masks = (char *) end_local_plt; | |
7a9361c0 AM |
5581 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
5582 | if (local_syms == NULL && locsymcount != 0) | |
5583 | { | |
5584 | local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, locsymcount, | |
5585 | 0, NULL, NULL, NULL); | |
5586 | if (local_syms == NULL) | |
5587 | return false; | |
5588 | } | |
91d6fa6a | 5589 | |
7a9361c0 AM |
5590 | for (isym = local_syms; |
5591 | local_got < end_local_got; | |
5592 | ++local_got, ++lgot_masks, ++isym) | |
25dbc73a AM |
5593 | if (*local_got > 0) |
5594 | { | |
f15d0b54 | 5595 | unsigned int need; |
37da22e5 | 5596 | if ((*lgot_masks & (TLS_TLS | TLS_LD)) == (TLS_TLS | TLS_LD)) |
f15d0b54 AM |
5597 | htab->tlsld_got.refcount += 1; |
5598 | need = got_entries_needed (*lgot_masks); | |
d6e14abc AM |
5599 | if (need == 0) |
5600 | *local_got = (bfd_vma) -1; | |
25dbc73a AM |
5601 | else |
5602 | { | |
3b36f7e6 | 5603 | *local_got = allocate_got (htab, need); |
f749f26e AM |
5604 | if (bfd_link_pic (info) |
5605 | && !((*lgot_masks & TLS_TLS) != 0 | |
7a9361c0 AM |
5606 | && bfd_link_executable (info)) |
5607 | && isym->st_shndx != SHN_ABS) | |
0bed072f | 5608 | { |
f15d0b54 | 5609 | asection *srel; |
f15d0b54 | 5610 | |
f749f26e | 5611 | need *= sizeof (Elf32_External_Rela) / 4; |
f15d0b54 | 5612 | srel = htab->elf.srelgot; |
37da22e5 | 5613 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
ce558b89 | 5614 | srel = htab->elf.irelplt; |
f15d0b54 | 5615 | srel->size += need; |
0bed072f | 5616 | } |
25dbc73a AM |
5617 | } |
5618 | } | |
5619 | else | |
5620 | *local_got = (bfd_vma) -1; | |
e054468f | 5621 | |
90c14f0c | 5622 | if (htab->elf.target_os == is_vxworks) |
e054468f AM |
5623 | continue; |
5624 | ||
5625 | /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ | |
2d7ad24e AM |
5626 | lgot_masks = (char *) end_local_plt; |
5627 | for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks) | |
e054468f AM |
5628 | { |
5629 | struct plt_entry *ent; | |
0a1b45a2 | 5630 | bool doneone = false; |
2d7ad24e | 5631 | bfd_vma plt_offset = 0, glink_offset = (bfd_vma) -1; |
e054468f AM |
5632 | |
5633 | for (ent = *local_plt; ent != NULL; ent = ent->next) | |
5634 | if (ent->plt.refcount > 0) | |
5635 | { | |
2d7ad24e AM |
5636 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
5637 | s = htab->elf.iplt; | |
3e04d765 AM |
5638 | else if (htab->can_convert_all_inline_plt |
5639 | || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP) | |
2d7ad24e AM |
5640 | { |
5641 | ent->plt.offset = (bfd_vma) -1; | |
5642 | continue; | |
5643 | } | |
5644 | else | |
5645 | s = htab->pltlocal; | |
e054468f AM |
5646 | |
5647 | if (!doneone) | |
5648 | { | |
5649 | plt_offset = s->size; | |
5650 | s->size += 4; | |
5651 | } | |
5652 | ent->plt.offset = plt_offset; | |
5653 | ||
2d7ad24e | 5654 | if (s != htab->pltlocal && (!doneone || bfd_link_pic (info))) |
e054468f | 5655 | { |
2d7ad24e | 5656 | s = htab->glink; |
e054468f | 5657 | glink_offset = s->size; |
9e390558 | 5658 | s->size += GLINK_ENTRY_SIZE (htab, NULL); |
e054468f AM |
5659 | } |
5660 | ent->glink_offset = glink_offset; | |
5661 | ||
5662 | if (!doneone) | |
5663 | { | |
2d7ad24e AM |
5664 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
5665 | { | |
5666 | s = htab->elf.irelplt; | |
5667 | s->size += sizeof (Elf32_External_Rela); | |
5668 | } | |
5669 | else if (bfd_link_pic (info)) | |
5670 | { | |
5671 | s = htab->relpltlocal; | |
5672 | s->size += sizeof (Elf32_External_Rela); | |
5673 | } | |
0a1b45a2 | 5674 | doneone = true; |
e054468f AM |
5675 | } |
5676 | } | |
5677 | else | |
5678 | ent->plt.offset = (bfd_vma) -1; | |
5679 | } | |
7a9361c0 AM |
5680 | |
5681 | if (local_syms != NULL | |
5682 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
5683 | { | |
5684 | if (!info->keep_memory) | |
5685 | free (local_syms); | |
5686 | else | |
5687 | symtab_hdr->contents = (unsigned char *) local_syms; | |
5688 | } | |
25dbc73a | 5689 | } |
252b5132 | 5690 | |
b7fcf6f6 AM |
5691 | /* Allocate space for global sym dynamic relocs. */ |
5692 | elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); | |
5693 | ||
3b36f7e6 AM |
5694 | if (htab->tlsld_got.refcount > 0) |
5695 | { | |
5696 | htab->tlsld_got.offset = allocate_got (htab, 8); | |
f749f26e | 5697 | if (bfd_link_dll (info)) |
ce558b89 | 5698 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
3b36f7e6 AM |
5699 | } |
5700 | else | |
5701 | htab->tlsld_got.offset = (bfd_vma) -1; | |
5702 | ||
ce558b89 | 5703 | if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS) |
3b36f7e6 AM |
5704 | { |
5705 | unsigned int g_o_t = 32768; | |
5706 | ||
4d962050 AM |
5707 | /* If we haven't allocated the header, do so now. When we get here, |
5708 | for old plt/got the got size will be 0 to 32764 (not allocated), | |
5709 | or 32780 to 65536 (header allocated). For new plt/got, the | |
5710 | corresponding ranges are 0 to 32768 and 32780 to 65536. */ | |
ce558b89 | 5711 | if (htab->elf.sgot->size <= 32768) |
3b36f7e6 | 5712 | { |
ce558b89 | 5713 | g_o_t = htab->elf.sgot->size; |
4a3dc543 | 5714 | if (htab->plt_type == PLT_OLD) |
4d962050 | 5715 | g_o_t += 4; |
ce558b89 | 5716 | htab->elf.sgot->size += htab->got_header_size; |
3b36f7e6 | 5717 | } |
3b36f7e6 AM |
5718 | |
5719 | htab->elf.hgot->root.u.def.value = g_o_t; | |
5720 | } | |
0e1862bb | 5721 | if (bfd_link_pic (info)) |
bd6c6e2b AM |
5722 | { |
5723 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; | |
93d1b056 AM |
5724 | |
5725 | sda->root.u.def.section = htab->elf.hgot->root.u.def.section; | |
5726 | sda->root.u.def.value = htab->elf.hgot->root.u.def.value; | |
bd6c6e2b | 5727 | } |
15bfcc77 AM |
5728 | if (info->emitrelocations) |
5729 | { | |
5730 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; | |
5731 | ||
5732 | if (sda != NULL && sda->ref_regular) | |
5733 | sda->root.u.def.section->flags |= SEC_KEEP; | |
5734 | sda = htab->sdata[1].sym; | |
5735 | if (sda != NULL && sda->ref_regular) | |
5736 | sda->root.u.def.section->flags |= SEC_KEEP; | |
5737 | } | |
3b36f7e6 | 5738 | |
e054468f AM |
5739 | if (htab->glink != NULL |
5740 | && htab->glink->size != 0 | |
5741 | && htab->elf.dynamic_sections_created) | |
d7128ce4 AM |
5742 | { |
5743 | htab->glink_pltresolve = htab->glink->size; | |
9e390558 AM |
5744 | /* Space for the branch table. */ |
5745 | htab->glink->size | |
5746 | += htab->elf.srelplt->size / (sizeof (Elf32_External_Rela) / 4) - 4; | |
86b9da88 | 5747 | /* Pad out to align the start of PLTresolve. */ |
5446cbdf AM |
5748 | htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround |
5749 | ? 63 : 15); | |
d7128ce4 | 5750 | htab->glink->size += GLINK_PLTRESOLVE; |
0ba07910 | 5751 | |
5446cbdf | 5752 | if (htab->params->emit_stub_syms) |
0ba07910 AM |
5753 | { |
5754 | struct elf_link_hash_entry *sh; | |
5755 | sh = elf_link_hash_lookup (&htab->elf, "__glink", | |
0a1b45a2 | 5756 | true, false, false); |
0ba07910 | 5757 | if (sh == NULL) |
0a1b45a2 | 5758 | return false; |
0ba07910 AM |
5759 | if (sh->root.type == bfd_link_hash_new) |
5760 | { | |
5761 | sh->root.type = bfd_link_hash_defined; | |
5762 | sh->root.u.def.section = htab->glink; | |
5763 | sh->root.u.def.value = htab->glink_pltresolve; | |
5764 | sh->ref_regular = 1; | |
5765 | sh->def_regular = 1; | |
5766 | sh->ref_regular_nonweak = 1; | |
5767 | sh->forced_local = 1; | |
5768 | sh->non_elf = 0; | |
2ec55de3 | 5769 | sh->root.linker_def = 1; |
0ba07910 AM |
5770 | } |
5771 | sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", | |
0a1b45a2 | 5772 | true, false, false); |
0ba07910 | 5773 | if (sh == NULL) |
0a1b45a2 | 5774 | return false; |
0ba07910 AM |
5775 | if (sh->root.type == bfd_link_hash_new) |
5776 | { | |
5777 | sh->root.type = bfd_link_hash_defined; | |
5778 | sh->root.u.def.section = htab->glink; | |
5779 | sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; | |
5780 | sh->ref_regular = 1; | |
5781 | sh->def_regular = 1; | |
5782 | sh->ref_regular_nonweak = 1; | |
5783 | sh->forced_local = 1; | |
5784 | sh->non_elf = 0; | |
2ec55de3 | 5785 | sh->root.linker_def = 1; |
0ba07910 AM |
5786 | } |
5787 | } | |
d7128ce4 AM |
5788 | } |
5789 | ||
6177242a AM |
5790 | if (htab->glink != NULL |
5791 | && htab->glink->size != 0 | |
5792 | && htab->glink_eh_frame != NULL | |
9a2a56cc AM |
5793 | && !bfd_is_abs_section (htab->glink_eh_frame->output_section) |
5794 | && _bfd_elf_eh_frame_present (info)) | |
6177242a AM |
5795 | { |
5796 | s = htab->glink_eh_frame; | |
5797 | s->size = sizeof (glink_eh_frame_cie) + 20; | |
0e1862bb | 5798 | if (bfd_link_pic (info)) |
6177242a AM |
5799 | { |
5800 | s->size += 4; | |
5801 | if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) | |
5802 | s->size += 4; | |
5803 | } | |
5804 | } | |
5805 | ||
25dbc73a AM |
5806 | /* We've now determined the sizes of the various dynamic sections. |
5807 | Allocate memory for them. */ | |
0a1b45a2 | 5808 | relocs = false; |
25dbc73a | 5809 | for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) |
252b5132 | 5810 | { |
0a1b45a2 | 5811 | bool strip_section = true; |
9d8504b1 | 5812 | |
25dbc73a AM |
5813 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
5814 | continue; | |
252b5132 | 5815 | |
ce558b89 AM |
5816 | if (s == htab->elf.splt |
5817 | || s == htab->elf.sgot) | |
25dbc73a | 5818 | { |
9d8504b1 PB |
5819 | /* We'd like to strip these sections if they aren't needed, but if |
5820 | we've exported dynamic symbols from them we must leave them. | |
5821 | It's too late to tell BFD to get rid of the symbols. */ | |
e054468f | 5822 | if (htab->elf.hplt != NULL) |
0a1b45a2 | 5823 | strip_section = false; |
25dbc73a AM |
5824 | /* Strip this section if we don't need it; see the |
5825 | comment below. */ | |
5826 | } | |
ce558b89 | 5827 | else if (s == htab->elf.iplt |
2d7ad24e | 5828 | || s == htab->pltlocal |
e054468f | 5829 | || s == htab->glink |
6177242a | 5830 | || s == htab->glink_eh_frame |
ce558b89 | 5831 | || s == htab->elf.sgotplt |
e054468f | 5832 | || s == htab->sbss |
9d19e4fd | 5833 | || s == htab->elf.sdynbss |
5474d94f | 5834 | || s == htab->elf.sdynrelro |
15bfcc77 | 5835 | || s == htab->dynsbss) |
25dbc73a | 5836 | { |
c9a2f333 | 5837 | /* Strip these too. */ |
25dbc73a | 5838 | } |
15bfcc77 AM |
5839 | else if (s == htab->sdata[0].section |
5840 | || s == htab->sdata[1].section) | |
5841 | { | |
5842 | strip_section = (s->flags & SEC_KEEP) == 0; | |
5843 | } | |
08dedd66 | 5844 | else if (startswith (bfd_section_name (s), ".rela")) |
25dbc73a | 5845 | { |
c456f082 | 5846 | if (s->size != 0) |
25dbc73a AM |
5847 | { |
5848 | /* Remember whether there are any relocation sections. */ | |
0a1b45a2 | 5849 | relocs = true; |
252b5132 | 5850 | |
25dbc73a AM |
5851 | /* We use the reloc_count field as a counter if we need |
5852 | to copy relocs into the output file. */ | |
5853 | s->reloc_count = 0; | |
252b5132 RH |
5854 | } |
5855 | } | |
25dbc73a AM |
5856 | else |
5857 | { | |
5858 | /* It's not one of our sections, so don't allocate space. */ | |
5859 | continue; | |
5860 | } | |
252b5132 | 5861 | |
9d8504b1 | 5862 | if (s->size == 0 && strip_section) |
25dbc73a | 5863 | { |
c456f082 AM |
5864 | /* If we don't need this section, strip it from the |
5865 | output file. This is mostly to handle .rela.bss and | |
5866 | .rela.plt. We must create both sections in | |
5867 | create_dynamic_sections, because they must be created | |
5868 | before the linker maps input sections to output | |
5869 | sections. The linker does that before | |
5870 | adjust_dynamic_symbol is called, and it is that | |
5871 | function which decides whether anything needs to go | |
5872 | into these sections. */ | |
8423293d | 5873 | s->flags |= SEC_EXCLUDE; |
25dbc73a AM |
5874 | continue; |
5875 | } | |
7fce784e | 5876 | |
d7128ce4 | 5877 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
644285ef AM |
5878 | continue; |
5879 | ||
25dbc73a AM |
5880 | /* Allocate memory for the section contents. */ |
5881 | s->contents = bfd_zalloc (htab->elf.dynobj, s->size); | |
5882 | if (s->contents == NULL) | |
0a1b45a2 | 5883 | return false; |
25dbc73a | 5884 | } |
252b5132 | 5885 | |
25dbc73a | 5886 | if (htab->elf.dynamic_sections_created) |
7619e7c7 | 5887 | { |
25dbc73a AM |
5888 | /* Add some entries to the .dynamic section. We fill in the |
5889 | values later, in ppc_elf_finish_dynamic_sections, but we | |
5890 | must add the entries now so that we get the correct size for | |
5891 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
5892 | dynamic linker and used by the debugger. */ | |
5893 | #define add_dynamic_entry(TAG, VAL) \ | |
5894 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
252b5132 | 5895 | |
3084d7a2 L |
5896 | if (!_bfd_elf_maybe_vxworks_add_dynamic_tags (output_bfd, info, |
5897 | relocs)) | |
0a1b45a2 | 5898 | return false; |
7619e7c7 | 5899 | |
c7e17e05 AM |
5900 | if (htab->plt_type == PLT_NEW |
5901 | && htab->glink != NULL | |
5902 | && htab->glink->size != 0) | |
d7128ce4 | 5903 | { |
1fe44d79 | 5904 | if (!add_dynamic_entry (DT_PPC_GOT, 0)) |
0a1b45a2 | 5905 | return false; |
5446cbdf | 5906 | if (!htab->params->no_tls_get_addr_opt |
a7f2871e AM |
5907 | && htab->tls_get_addr != NULL |
5908 | && htab->tls_get_addr->plt.plist != NULL | |
e8910a83 | 5909 | && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS)) |
0a1b45a2 | 5910 | return false; |
d7128ce4 | 5911 | } |
7a2b07ff | 5912 | } |
25dbc73a AM |
5913 | #undef add_dynamic_entry |
5914 | ||
7e01508c AM |
5915 | if (htab->glink_eh_frame != NULL |
5916 | && htab->glink_eh_frame->contents != NULL) | |
5917 | { | |
5918 | unsigned char *p = htab->glink_eh_frame->contents; | |
5919 | bfd_vma val; | |
5920 | ||
5921 | memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); | |
5922 | /* CIE length (rewrite in case little-endian). */ | |
5923 | bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); | |
5924 | p += sizeof (glink_eh_frame_cie); | |
5925 | /* FDE length. */ | |
5926 | val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); | |
5927 | bfd_put_32 (htab->elf.dynobj, val, p); | |
5928 | p += 4; | |
5929 | /* CIE pointer. */ | |
5930 | val = p - htab->glink_eh_frame->contents; | |
5931 | bfd_put_32 (htab->elf.dynobj, val, p); | |
5932 | p += 4; | |
5933 | /* Offset to .glink. Set later. */ | |
5934 | p += 4; | |
5935 | /* .glink size. */ | |
5936 | bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); | |
5937 | p += 4; | |
5938 | /* Augmentation. */ | |
5939 | p += 1; | |
5940 | ||
0e1862bb | 5941 | if (bfd_link_pic (info) |
7e01508c AM |
5942 | && htab->elf.dynamic_sections_created) |
5943 | { | |
5944 | bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; | |
5945 | if (adv < 64) | |
5946 | *p++ = DW_CFA_advance_loc + adv; | |
5947 | else if (adv < 256) | |
5948 | { | |
5949 | *p++ = DW_CFA_advance_loc1; | |
5950 | *p++ = adv; | |
5951 | } | |
5952 | else if (adv < 65536) | |
5953 | { | |
5954 | *p++ = DW_CFA_advance_loc2; | |
5955 | bfd_put_16 (htab->elf.dynobj, adv, p); | |
5956 | p += 2; | |
5957 | } | |
5958 | else | |
5959 | { | |
5960 | *p++ = DW_CFA_advance_loc4; | |
5961 | bfd_put_32 (htab->elf.dynobj, adv, p); | |
5962 | p += 4; | |
5963 | } | |
5964 | *p++ = DW_CFA_register; | |
5965 | *p++ = 65; | |
5966 | p++; | |
5967 | *p++ = DW_CFA_advance_loc + 4; | |
5968 | *p++ = DW_CFA_restore_extended; | |
5969 | *p++ = 65; | |
5970 | } | |
5971 | BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) | |
5972 | == htab->glink_eh_frame->size); | |
5973 | } | |
5974 | ||
0a1b45a2 | 5975 | return true; |
7619e7c7 | 5976 | } |
0eb4a168 | 5977 | |
93d1b056 AM |
5978 | /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output |
5979 | if it looks like nothing is using them. */ | |
5980 | ||
5981 | static void | |
5982 | maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect) | |
5983 | { | |
5984 | struct elf_link_hash_entry *sda = lsect->sym; | |
5985 | ||
5986 | if (sda != NULL && !sda->ref_regular && sda->dynindx == -1) | |
5987 | { | |
5988 | asection *s; | |
5989 | ||
5990 | s = bfd_get_section_by_name (output_bfd, lsect->name); | |
5991 | if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) | |
5992 | { | |
5993 | s = bfd_get_section_by_name (output_bfd, lsect->bss_name); | |
5994 | if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) | |
5995 | { | |
5996 | sda->def_regular = 0; | |
5997 | /* This is somewhat magic. See elf_link_output_extsym. */ | |
5998 | sda->ref_dynamic = 1; | |
5999 | sda->forced_local = 0; | |
6000 | } | |
6001 | } | |
6002 | } | |
6003 | } | |
6004 | ||
6005 | void | |
6006 | ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info) | |
6007 | { | |
6008 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); | |
6009 | ||
6010 | if (htab != NULL) | |
6011 | { | |
6012 | maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]); | |
6013 | maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]); | |
6014 | } | |
6015 | } | |
6016 | ||
6017 | ||
0eb4a168 AM |
6018 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6019 | ||
0a1b45a2 | 6020 | static bool |
0eb4a168 AM |
6021 | ppc_elf_hash_symbol (struct elf_link_hash_entry *h) |
6022 | { | |
6023 | if (h->plt.plist != NULL | |
6024 | && !h->def_regular | |
6025 | && (!h->pointer_equality_needed | |
6026 | || !h->ref_regular_nonweak)) | |
0a1b45a2 | 6027 | return false; |
0eb4a168 AM |
6028 | |
6029 | return _bfd_elf_hash_symbol (h); | |
6030 | } | |
25dbc73a AM |
6031 | \f |
6032 | #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) | |
6033 | ||
01017ef8 NS |
6034 | /* Relaxation trampolines. r12 is available for clobbering (r11, is |
6035 | used for some functions that are allowed to break the ABI). */ | |
25dbc73a AM |
6036 | static const int shared_stub_entry[] = |
6037 | { | |
6038 | 0x7c0802a6, /* mflr 0 */ | |
6039 | 0x429f0005, /* bcl 20, 31, .Lxxx */ | |
01017ef8 NS |
6040 | 0x7d8802a6, /* mflr 12 */ |
6041 | 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ | |
53291d1f | 6042 | 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */ |
25dbc73a | 6043 | 0x7c0803a6, /* mtlr 0 */ |
01017ef8 | 6044 | 0x7d8903a6, /* mtctr 12 */ |
25dbc73a AM |
6045 | 0x4e800420, /* bctr */ |
6046 | }; | |
6047 | ||
6048 | static const int stub_entry[] = | |
6049 | { | |
01017ef8 NS |
6050 | 0x3d800000, /* lis 12,xxx@ha */ |
6051 | 0x398c0000, /* addi 12,12,xxx@l */ | |
6052 | 0x7d8903a6, /* mtctr 12 */ | |
25dbc73a AM |
6053 | 0x4e800420, /* bctr */ |
6054 | }; | |
6055 | ||
5446cbdf AM |
6056 | struct ppc_elf_relax_info |
6057 | { | |
6058 | unsigned int workaround_size; | |
d3e454b9 | 6059 | unsigned int picfixup_size; |
5446cbdf AM |
6060 | }; |
6061 | ||
6062 | /* This function implements long branch trampolines, and the ppc476 | |
6063 | icache bug workaround. Any section needing trampolines or patch | |
6064 | space for the workaround has its size extended so that we can | |
53291d1f | 6065 | add trampolines at the end of the section. */ |
5446cbdf | 6066 | |
0a1b45a2 | 6067 | static bool |
25dbc73a AM |
6068 | ppc_elf_relax_section (bfd *abfd, |
6069 | asection *isec, | |
6070 | struct bfd_link_info *link_info, | |
0a1b45a2 | 6071 | bool *again) |
25dbc73a | 6072 | { |
d3e454b9 | 6073 | struct one_branch_fixup |
25dbc73a | 6074 | { |
d3e454b9 | 6075 | struct one_branch_fixup *next; |
25dbc73a | 6076 | asection *tsec; |
01017ef8 NS |
6077 | /* Final link, can use the symbol offset. For a |
6078 | relocatable link we use the symbol's index. */ | |
25dbc73a AM |
6079 | bfd_vma toff; |
6080 | bfd_vma trampoff; | |
6081 | }; | |
7619e7c7 | 6082 | |
25dbc73a AM |
6083 | Elf_Internal_Shdr *symtab_hdr; |
6084 | bfd_byte *contents = NULL; | |
6085 | Elf_Internal_Sym *isymbuf = NULL; | |
6086 | Elf_Internal_Rela *internal_relocs = NULL; | |
5446cbdf | 6087 | Elf_Internal_Rela *irel, *irelend = NULL; |
d3e454b9 | 6088 | struct one_branch_fixup *branch_fixups = NULL; |
5446cbdf | 6089 | struct ppc_elf_relax_info *relax_info = NULL; |
9bc4e62b | 6090 | unsigned changes = 0; |
0a1b45a2 | 6091 | bool workaround_change; |
d7128ce4 | 6092 | struct ppc_elf_link_hash_table *htab; |
d3e454b9 | 6093 | bfd_size_type trampbase, trampoff, newsize, picfixup_size; |
a6aa5195 | 6094 | asection *got2; |
0a1b45a2 | 6095 | bool maybe_pasted; |
7619e7c7 | 6096 | |
0a1b45a2 | 6097 | *again = false; |
7619e7c7 | 6098 | |
5446cbdf | 6099 | /* No need to do anything with non-alloc or non-code sections. */ |
c87b5a93 | 6100 | if ((isec->flags & SEC_ALLOC) == 0 |
a8ad78a7 | 6101 | || (isec->flags & SEC_CODE) == 0 |
5446cbdf AM |
6102 | || (isec->flags & SEC_LINKER_CREATED) != 0 |
6103 | || isec->size < 4) | |
0a1b45a2 | 6104 | return true; |
7619e7c7 | 6105 | |
c8a1f254 NS |
6106 | /* We cannot represent the required PIC relocs in the output, so don't |
6107 | do anything. The linker doesn't support mixing -shared and -r | |
6108 | anyway. */ | |
0e1862bb | 6109 | if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info)) |
0a1b45a2 | 6110 | return true; |
5b914448 | 6111 | |
5446cbdf AM |
6112 | htab = ppc_elf_hash_table (link_info); |
6113 | if (htab == NULL) | |
0a1b45a2 | 6114 | return true; |
5446cbdf AM |
6115 | |
6116 | isec->size = (isec->size + 3) & -4; | |
6117 | if (isec->rawsize == 0) | |
6118 | isec->rawsize = isec->size; | |
6119 | trampbase = isec->size; | |
6120 | ||
53291d1f AM |
6121 | BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE |
6122 | || isec->sec_info_type == SEC_INFO_TYPE_TARGET); | |
6123 | isec->sec_info_type = SEC_INFO_TYPE_TARGET; | |
6124 | ||
d3e454b9 AM |
6125 | if (htab->params->ppc476_workaround |
6126 | || htab->params->pic_fixup > 0) | |
5446cbdf AM |
6127 | { |
6128 | if (elf_section_data (isec)->sec_info == NULL) | |
6129 | { | |
5446cbdf AM |
6130 | elf_section_data (isec)->sec_info |
6131 | = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info)); | |
6132 | if (elf_section_data (isec)->sec_info == NULL) | |
0a1b45a2 | 6133 | return false; |
5446cbdf AM |
6134 | } |
6135 | relax_info = elf_section_data (isec)->sec_info; | |
6136 | trampbase -= relax_info->workaround_size; | |
6137 | } | |
6138 | ||
50248c89 AM |
6139 | maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 |
6140 | || strcmp (isec->output_section->name, ".fini") == 0); | |
25dbc73a | 6141 | /* Space for a branch around any trampolines. */ |
5446cbdf AM |
6142 | trampoff = trampbase; |
6143 | if (maybe_pasted && trampbase == isec->rawsize) | |
50248c89 | 6144 | trampoff += 4; |
7619e7c7 | 6145 | |
0ffa91dd | 6146 | symtab_hdr = &elf_symtab_hdr (abfd); |
d3e454b9 AM |
6147 | picfixup_size = 0; |
6148 | if (htab->params->branch_trampolines | |
6149 | || htab->params->pic_fixup > 0) | |
7619e7c7 | 6150 | { |
5446cbdf AM |
6151 | /* Get a copy of the native relocations. */ |
6152 | if (isec->reloc_count != 0) | |
25dbc73a | 6153 | { |
5446cbdf AM |
6154 | internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, |
6155 | link_info->keep_memory); | |
6156 | if (internal_relocs == NULL) | |
6157 | goto error_return; | |
25dbc73a | 6158 | } |
7619e7c7 | 6159 | |
5446cbdf AM |
6160 | got2 = bfd_get_section_by_name (abfd, ".got2"); |
6161 | ||
6162 | irelend = internal_relocs + isec->reloc_count; | |
6163 | for (irel = internal_relocs; irel < irelend; irel++) | |
25dbc73a | 6164 | { |
5446cbdf AM |
6165 | unsigned long r_type = ELF32_R_TYPE (irel->r_info); |
6166 | bfd_vma toff, roff; | |
6167 | asection *tsec; | |
d3e454b9 | 6168 | struct one_branch_fixup *f; |
5446cbdf | 6169 | size_t insn_offset = 0; |
d3e454b9 | 6170 | bfd_vma max_branch_offset = 0, val; |
5446cbdf AM |
6171 | bfd_byte *hit_addr; |
6172 | unsigned long t0; | |
6173 | struct elf_link_hash_entry *h; | |
49c09209 | 6174 | Elf_Internal_Sym *isym; |
5446cbdf AM |
6175 | struct plt_entry **plist; |
6176 | unsigned char sym_type; | |
6177 | ||
6178 | switch (r_type) | |
6179 | { | |
6180 | case R_PPC_REL24: | |
6181 | case R_PPC_LOCAL24PC: | |
6182 | case R_PPC_PLTREL24: | |
23cedd1d | 6183 | case R_PPC_PLTCALL: |
5446cbdf AM |
6184 | max_branch_offset = 1 << 25; |
6185 | break; | |
6186 | ||
6187 | case R_PPC_REL14: | |
6188 | case R_PPC_REL14_BRTAKEN: | |
6189 | case R_PPC_REL14_BRNTAKEN: | |
6190 | max_branch_offset = 1 << 15; | |
6191 | break; | |
7fce784e | 6192 | |
d3e454b9 AM |
6193 | case R_PPC_ADDR16_HA: |
6194 | if (htab->params->pic_fixup > 0) | |
6195 | break; | |
6196 | continue; | |
6197 | ||
5446cbdf AM |
6198 | default: |
6199 | continue; | |
6200 | } | |
6201 | ||
6202 | /* Get the value of the symbol referred to by the reloc. */ | |
49c09209 AM |
6203 | if (!get_sym_h (&h, &isym, &tsec, NULL, &isymbuf, |
6204 | ELF32_R_SYM (irel->r_info), abfd)) | |
6205 | goto error_return; | |
5446cbdf | 6206 | |
49c09209 AM |
6207 | if (isym != NULL) |
6208 | { | |
6209 | if (tsec != NULL) | |
6210 | ; | |
5446cbdf AM |
6211 | else if (isym->st_shndx == SHN_ABS) |
6212 | tsec = bfd_abs_section_ptr; | |
49199304 AM |
6213 | else |
6214 | continue; | |
5446cbdf AM |
6215 | |
6216 | toff = isym->st_value; | |
6217 | sym_type = ELF_ST_TYPE (isym->st_info); | |
25dbc73a | 6218 | } |
25dbc73a | 6219 | else |
5446cbdf | 6220 | { |
49c09209 AM |
6221 | if (tsec != NULL) |
6222 | toff = h->root.u.def.value; | |
5446cbdf AM |
6223 | else if (h->root.type == bfd_link_hash_undefined |
6224 | || h->root.type == bfd_link_hash_undefweak) | |
6225 | { | |
49c09209 AM |
6226 | unsigned long indx; |
6227 | ||
6228 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
5446cbdf | 6229 | tsec = bfd_und_section_ptr; |
0e1862bb | 6230 | toff = bfd_link_relocatable (link_info) ? indx : 0; |
5446cbdf AM |
6231 | } |
6232 | else | |
6233 | continue; | |
6234 | ||
9f7552cf AM |
6235 | /* If this branch is to __tls_get_addr then we may later |
6236 | optimise away the call. We won't be needing a long- | |
6237 | branch stub in that case. */ | |
0e1862bb | 6238 | if (bfd_link_executable (link_info) |
9f7552cf AM |
6239 | && h == htab->tls_get_addr |
6240 | && irel != internal_relocs) | |
6241 | { | |
6242 | unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info); | |
6243 | unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info); | |
6244 | unsigned int tls_mask = 0; | |
6245 | ||
6246 | /* The previous reloc should be one of R_PPC_TLSGD or | |
6247 | R_PPC_TLSLD, or for older object files, a reloc | |
6248 | on the __tls_get_addr arg setup insn. Get tls | |
6249 | mask bits from the symbol on that reloc. */ | |
6250 | if (t_symndx < symtab_hdr->sh_info) | |
6251 | { | |
6252 | bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); | |
6253 | ||
6254 | if (local_got_offsets != NULL) | |
6255 | { | |
6256 | struct plt_entry **local_plt = (struct plt_entry **) | |
6257 | (local_got_offsets + symtab_hdr->sh_info); | |
6258 | char *lgot_masks = (char *) | |
6259 | (local_plt + symtab_hdr->sh_info); | |
6260 | tls_mask = lgot_masks[t_symndx]; | |
6261 | } | |
6262 | } | |
6263 | else | |
6264 | { | |
6265 | struct elf_link_hash_entry *th | |
6266 | = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info]; | |
6267 | ||
6268 | while (th->root.type == bfd_link_hash_indirect | |
6269 | || th->root.type == bfd_link_hash_warning) | |
6270 | th = (struct elf_link_hash_entry *) th->root.u.i.link; | |
6271 | ||
6272 | tls_mask | |
6273 | = ((struct ppc_elf_link_hash_entry *) th)->tls_mask; | |
6274 | } | |
6275 | ||
6276 | /* The mask bits tell us if the call will be | |
6277 | optimised away. */ | |
6278 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 | |
6279 | && (t_rtype == R_PPC_TLSGD | |
6280 | || t_rtype == R_PPC_GOT_TLSGD16 | |
6281 | || t_rtype == R_PPC_GOT_TLSGD16_LO)) | |
6282 | continue; | |
6283 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 | |
6284 | && (t_rtype == R_PPC_TLSLD | |
6285 | || t_rtype == R_PPC_GOT_TLSLD16 | |
6286 | || t_rtype == R_PPC_GOT_TLSLD16_LO)) | |
6287 | continue; | |
6288 | } | |
6289 | ||
5446cbdf AM |
6290 | sym_type = h->type; |
6291 | } | |
7619e7c7 | 6292 | |
d3e454b9 AM |
6293 | if (r_type == R_PPC_ADDR16_HA) |
6294 | { | |
6295 | if (h != NULL | |
6296 | && !h->def_regular | |
6297 | && h->protected_def | |
6298 | && ppc_elf_hash_entry (h)->has_addr16_ha | |
6299 | && ppc_elf_hash_entry (h)->has_addr16_lo) | |
6300 | picfixup_size += 12; | |
6301 | continue; | |
6302 | } | |
6303 | ||
5446cbdf AM |
6304 | /* The condition here under which we call find_plt_ent must |
6305 | match that in relocate_section. If we call find_plt_ent here | |
6306 | but not in relocate_section, or vice versa, then the branch | |
6307 | destination used here may be incorrect. */ | |
6308 | plist = NULL; | |
6309 | if (h != NULL) | |
25dbc73a | 6310 | { |
5446cbdf AM |
6311 | /* We know is_branch_reloc (r_type) is true. */ |
6312 | if (h->type == STT_GNU_IFUNC | |
6313 | || r_type == R_PPC_PLTREL24) | |
6314 | plist = &h->plt.plist; | |
25dbc73a | 6315 | } |
5446cbdf AM |
6316 | else if (sym_type == STT_GNU_IFUNC |
6317 | && elf_local_got_offsets (abfd) != NULL) | |
c8a1f254 | 6318 | { |
5446cbdf AM |
6319 | bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); |
6320 | struct plt_entry **local_plt = (struct plt_entry **) | |
6321 | (local_got_offsets + symtab_hdr->sh_info); | |
6322 | plist = local_plt + ELF32_R_SYM (irel->r_info); | |
c8a1f254 | 6323 | } |
5446cbdf | 6324 | if (plist != NULL) |
a9585d22 | 6325 | { |
5446cbdf AM |
6326 | bfd_vma addend = 0; |
6327 | struct plt_entry *ent; | |
6328 | ||
0e1862bb | 6329 | if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info)) |
5446cbdf AM |
6330 | addend = irel->r_addend; |
6331 | ent = find_plt_ent (plist, got2, addend); | |
6332 | if (ent != NULL) | |
a9585d22 | 6333 | { |
5446cbdf AM |
6334 | if (htab->plt_type == PLT_NEW |
6335 | || h == NULL | |
6336 | || !htab->elf.dynamic_sections_created | |
6337 | || h->dynindx == -1) | |
6338 | { | |
6339 | tsec = htab->glink; | |
6340 | toff = ent->glink_offset; | |
6341 | } | |
6342 | else | |
6343 | { | |
ce558b89 | 6344 | tsec = htab->elf.splt; |
5446cbdf AM |
6345 | toff = ent->plt.offset; |
6346 | } | |
de972ffa AM |
6347 | } |
6348 | } | |
de972ffa | 6349 | |
5446cbdf AM |
6350 | /* If the branch and target are in the same section, you have |
6351 | no hope of adding stubs. We'll error out later should the | |
6352 | branch overflow. */ | |
6353 | if (tsec == isec) | |
6354 | continue; | |
25dbc73a | 6355 | |
49199304 AM |
6356 | /* toff is used for the symbol index when the symbol is |
6357 | undefined and we're doing a relocatable link, so we can't | |
6358 | support addends. It would be possible to do so by | |
6359 | putting the addend in one_branch_fixup but addends on | |
6360 | branches are rare so it hardly seems worth supporting. */ | |
6361 | if (bfd_link_relocatable (link_info) | |
6362 | && tsec == bfd_und_section_ptr | |
6363 | && r_type != R_PPC_PLTREL24 | |
6364 | && irel->r_addend != 0) | |
6365 | continue; | |
6366 | ||
5446cbdf AM |
6367 | /* There probably isn't any reason to handle symbols in |
6368 | SEC_MERGE sections; SEC_MERGE doesn't seem a likely | |
6369 | attribute for a code section, and we are only looking at | |
6370 | branches. However, implement it correctly here as a | |
6371 | reference for other target relax_section functions. */ | |
6372 | if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) | |
6373 | { | |
6374 | /* At this stage in linking, no SEC_MERGE symbol has been | |
6375 | adjusted, so all references to such symbols need to be | |
6376 | passed through _bfd_merged_section_offset. (Later, in | |
6377 | relocate_section, all SEC_MERGE symbols *except* for | |
6378 | section symbols have been adjusted.) | |
6379 | ||
6380 | gas may reduce relocations against symbols in SEC_MERGE | |
6381 | sections to a relocation against the section symbol when | |
6382 | the original addend was zero. When the reloc is against | |
6383 | a section symbol we should include the addend in the | |
6384 | offset passed to _bfd_merged_section_offset, since the | |
6385 | location of interest is the original symbol. On the | |
6386 | other hand, an access to "sym+addend" where "sym" is not | |
6387 | a section symbol should not include the addend; Such an | |
6388 | access is presumed to be an offset from "sym"; The | |
6389 | location of interest is just "sym". */ | |
49199304 AM |
6390 | if (sym_type == STT_SECTION |
6391 | && r_type != R_PPC_PLTREL24) | |
5446cbdf AM |
6392 | toff += irel->r_addend; |
6393 | ||
6394 | toff | |
6395 | = _bfd_merged_section_offset (abfd, &tsec, | |
6396 | elf_section_data (tsec)->sec_info, | |
6397 | toff); | |
6398 | ||
49199304 AM |
6399 | if (sym_type != STT_SECTION |
6400 | && r_type != R_PPC_PLTREL24) | |
5446cbdf AM |
6401 | toff += irel->r_addend; |
6402 | } | |
6403 | /* PLTREL24 addends are special. */ | |
6404 | else if (r_type != R_PPC_PLTREL24) | |
25dbc73a | 6405 | toff += irel->r_addend; |
7619e7c7 | 6406 | |
5446cbdf | 6407 | /* Attempted -shared link of non-pic code loses. */ |
0e1862bb | 6408 | if ((!bfd_link_relocatable (link_info) |
5446cbdf AM |
6409 | && tsec == bfd_und_section_ptr) |
6410 | || tsec->output_section == NULL | |
6411 | || (tsec->owner != NULL | |
6412 | && (tsec->owner->flags & BFD_PLUGIN) != 0)) | |
6413 | continue; | |
7619e7c7 | 6414 | |
5446cbdf | 6415 | roff = irel->r_offset; |
7de713b9 | 6416 | |
49199304 AM |
6417 | /* Avoid creating a lot of unnecessary fixups when |
6418 | relocatable if the output section size is such that a | |
6419 | fixup can be created at final link. | |
6420 | The max_branch_offset adjustment allows for some number | |
6421 | of other fixups being needed at final link. */ | |
6422 | if (bfd_link_relocatable (link_info) | |
6423 | && (isec->output_section->rawsize - (isec->output_offset + roff) | |
6424 | < max_branch_offset - (max_branch_offset >> 4))) | |
6425 | continue; | |
6426 | ||
5446cbdf AM |
6427 | /* If the branch is in range, no need to do anything. */ |
6428 | if (tsec != bfd_und_section_ptr | |
0e1862bb | 6429 | && (!bfd_link_relocatable (link_info) |
5446cbdf AM |
6430 | /* A relocatable link may have sections moved during |
6431 | final link, so do not presume they remain in range. */ | |
6432 | || tsec->output_section == isec->output_section)) | |
6433 | { | |
6434 | bfd_vma symaddr, reladdr; | |
7619e7c7 | 6435 | |
5446cbdf AM |
6436 | symaddr = tsec->output_section->vma + tsec->output_offset + toff; |
6437 | reladdr = isec->output_section->vma + isec->output_offset + roff; | |
6438 | if (symaddr - reladdr + max_branch_offset | |
6439 | < 2 * max_branch_offset) | |
6440 | continue; | |
6441 | } | |
01017ef8 | 6442 | |
5446cbdf | 6443 | /* Look for an existing fixup to this address. */ |
d3e454b9 | 6444 | for (f = branch_fixups; f ; f = f->next) |
5446cbdf AM |
6445 | if (f->tsec == tsec && f->toff == toff) |
6446 | break; | |
252b5132 | 6447 | |
5446cbdf AM |
6448 | if (f == NULL) |
6449 | { | |
6450 | size_t size; | |
6451 | unsigned long stub_rtype; | |
25dbc73a | 6452 | |
5446cbdf AM |
6453 | val = trampoff - roff; |
6454 | if (val >= max_branch_offset) | |
6455 | /* Oh dear, we can't reach a trampoline. Don't try to add | |
6456 | one. We'll report an error later. */ | |
6457 | continue; | |
252b5132 | 6458 | |
0e1862bb | 6459 | if (bfd_link_pic (link_info)) |
5446cbdf AM |
6460 | { |
6461 | size = 4 * ARRAY_SIZE (shared_stub_entry); | |
6462 | insn_offset = 12; | |
6463 | } | |
6464 | else | |
6465 | { | |
6466 | size = 4 * ARRAY_SIZE (stub_entry); | |
6467 | insn_offset = 0; | |
6468 | } | |
6469 | stub_rtype = R_PPC_RELAX; | |
ce558b89 | 6470 | if (tsec == htab->elf.splt |
5446cbdf AM |
6471 | || tsec == htab->glink) |
6472 | { | |
6473 | stub_rtype = R_PPC_RELAX_PLT; | |
6474 | if (r_type == R_PPC_PLTREL24) | |
6475 | stub_rtype = R_PPC_RELAX_PLTREL24; | |
6476 | } | |
252b5132 | 6477 | |
5446cbdf AM |
6478 | /* Hijack the old relocation. Since we need two |
6479 | relocations for this use a "composite" reloc. */ | |
6480 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
6481 | stub_rtype); | |
6482 | irel->r_offset = trampoff + insn_offset; | |
6483 | if (r_type == R_PPC_PLTREL24 | |
6484 | && stub_rtype != R_PPC_RELAX_PLTREL24) | |
6485 | irel->r_addend = 0; | |
6486 | ||
6487 | /* Record the fixup so we don't do it again this section. */ | |
6488 | f = bfd_malloc (sizeof (*f)); | |
d3e454b9 | 6489 | f->next = branch_fixups; |
5446cbdf AM |
6490 | f->tsec = tsec; |
6491 | f->toff = toff; | |
6492 | f->trampoff = trampoff; | |
d3e454b9 | 6493 | branch_fixups = f; |
5446cbdf AM |
6494 | |
6495 | trampoff += size; | |
6496 | changes++; | |
25dbc73a AM |
6497 | } |
6498 | else | |
6499 | { | |
5446cbdf AM |
6500 | val = f->trampoff - roff; |
6501 | if (val >= max_branch_offset) | |
6502 | continue; | |
252b5132 | 6503 | |
5446cbdf AM |
6504 | /* Nop out the reloc, since we're finalizing things here. */ |
6505 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); | |
6506 | } | |
252b5132 | 6507 | |
5446cbdf AM |
6508 | /* Get the section contents. */ |
6509 | if (contents == NULL) | |
25dbc73a | 6510 | { |
5446cbdf AM |
6511 | /* Get cached copy if it exists. */ |
6512 | if (elf_section_data (isec)->this_hdr.contents != NULL) | |
6513 | contents = elf_section_data (isec)->this_hdr.contents; | |
25dbc73a | 6514 | /* Go get them off disk. */ |
5446cbdf | 6515 | else if (!bfd_malloc_and_get_section (abfd, isec, &contents)) |
25dbc73a AM |
6516 | goto error_return; |
6517 | } | |
252b5132 | 6518 | |
5446cbdf AM |
6519 | /* Fix up the existing branch to hit the trampoline. */ |
6520 | hit_addr = contents + roff; | |
6521 | switch (r_type) | |
6522 | { | |
6523 | case R_PPC_REL24: | |
6524 | case R_PPC_LOCAL24PC: | |
6525 | case R_PPC_PLTREL24: | |
6526 | t0 = bfd_get_32 (abfd, hit_addr); | |
6527 | t0 &= ~0x3fffffc; | |
6528 | t0 |= val & 0x3fffffc; | |
6529 | bfd_put_32 (abfd, t0, hit_addr); | |
6530 | break; | |
252b5132 | 6531 | |
5446cbdf AM |
6532 | case R_PPC_REL14: |
6533 | case R_PPC_REL14_BRTAKEN: | |
6534 | case R_PPC_REL14_BRNTAKEN: | |
6535 | t0 = bfd_get_32 (abfd, hit_addr); | |
6536 | t0 &= ~0xfffc; | |
6537 | t0 |= val & 0xfffc; | |
6538 | bfd_put_32 (abfd, t0, hit_addr); | |
6539 | break; | |
6540 | } | |
25dbc73a | 6541 | } |
252b5132 | 6542 | |
d3e454b9 | 6543 | while (branch_fixups != NULL) |
25dbc73a | 6544 | { |
d3e454b9 AM |
6545 | struct one_branch_fixup *f = branch_fixups; |
6546 | branch_fixups = branch_fixups->next; | |
25dbc73a AM |
6547 | free (f); |
6548 | } | |
5446cbdf | 6549 | } |
252b5132 | 6550 | |
0a1b45a2 | 6551 | workaround_change = false; |
5446cbdf | 6552 | newsize = trampoff; |
795bc6b3 | 6553 | if (htab->params->ppc476_workaround |
0e1862bb | 6554 | && (!bfd_link_relocatable (link_info) |
795bc6b3 | 6555 | || isec->output_section->alignment_power >= htab->params->pagesize_p2)) |
5446cbdf AM |
6556 | { |
6557 | bfd_vma addr, end_addr; | |
6558 | unsigned int crossings; | |
795bc6b3 | 6559 | bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; |
5446cbdf AM |
6560 | |
6561 | addr = isec->output_section->vma + isec->output_offset; | |
6128f9cf | 6562 | end_addr = addr + trampoff; |
5446cbdf | 6563 | addr &= -pagesize; |
795bc6b3 | 6564 | crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2; |
5446cbdf AM |
6565 | if (crossings != 0) |
6566 | { | |
6567 | /* Keep space aligned, to ensure the patch code itself does | |
6568 | not cross a page. Don't decrease size calculated on a | |
6569 | previous pass as otherwise we might never settle on a layout. */ | |
1e269e9b | 6570 | newsize = 15 - ((end_addr - 1) & 15); |
5446cbdf AM |
6571 | newsize += crossings * 16; |
6572 | if (relax_info->workaround_size < newsize) | |
6573 | { | |
6574 | relax_info->workaround_size = newsize; | |
0a1b45a2 | 6575 | workaround_change = true; |
5446cbdf AM |
6576 | } |
6577 | /* Ensure relocate_section is called. */ | |
6578 | isec->flags |= SEC_RELOC; | |
6579 | } | |
6580 | newsize = trampoff + relax_info->workaround_size; | |
6581 | } | |
6582 | ||
d3e454b9 AM |
6583 | if (htab->params->pic_fixup > 0) |
6584 | { | |
6585 | picfixup_size -= relax_info->picfixup_size; | |
6586 | if (picfixup_size != 0) | |
6587 | relax_info->picfixup_size += picfixup_size; | |
6588 | newsize += relax_info->picfixup_size; | |
6589 | } | |
6590 | ||
6591 | if (changes != 0 || picfixup_size != 0 || workaround_change) | |
5446cbdf AM |
6592 | isec->size = newsize; |
6593 | ||
25dbc73a AM |
6594 | if (isymbuf != NULL |
6595 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
252b5132 | 6596 | { |
25dbc73a AM |
6597 | if (! link_info->keep_memory) |
6598 | free (isymbuf); | |
252b5132 | 6599 | else |
25dbc73a AM |
6600 | { |
6601 | /* Cache the symbols for elf_link_input_bfd. */ | |
6602 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
6603 | } | |
252b5132 RH |
6604 | } |
6605 | ||
25dbc73a AM |
6606 | if (contents != NULL |
6607 | && elf_section_data (isec)->this_hdr.contents != contents) | |
6608 | { | |
53291d1f | 6609 | if (!changes && !link_info->keep_memory) |
25dbc73a AM |
6610 | free (contents); |
6611 | else | |
6612 | { | |
6613 | /* Cache the section contents for elf_link_input_bfd. */ | |
6614 | elf_section_data (isec)->this_hdr.contents = contents; | |
6615 | } | |
6616 | } | |
252b5132 | 6617 | |
d3e454b9 | 6618 | changes += picfixup_size; |
9bc4e62b | 6619 | if (changes != 0) |
25dbc73a | 6620 | { |
9bc4e62b NS |
6621 | /* Append sufficient NOP relocs so we can write out relocation |
6622 | information for the trampolines. */ | |
d4730f92 | 6623 | Elf_Internal_Shdr *rel_hdr; |
9bc4e62b NS |
6624 | Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) |
6625 | * sizeof (*new_relocs)); | |
6626 | unsigned ix; | |
5b914448 | 6627 | |
9bc4e62b NS |
6628 | if (!new_relocs) |
6629 | goto error_return; | |
6630 | memcpy (new_relocs, internal_relocs, | |
6631 | isec->reloc_count * sizeof (*new_relocs)); | |
6632 | for (ix = changes; ix--;) | |
6633 | { | |
6634 | irel = new_relocs + ix + isec->reloc_count; | |
6635 | ||
6636 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); | |
6637 | } | |
6638 | if (internal_relocs != elf_section_data (isec)->relocs) | |
25dbc73a | 6639 | free (internal_relocs); |
9bc4e62b NS |
6640 | elf_section_data (isec)->relocs = new_relocs; |
6641 | isec->reloc_count += changes; | |
d4730f92 BS |
6642 | rel_hdr = _bfd_elf_single_rel_hdr (isec); |
6643 | rel_hdr->sh_size += changes * rel_hdr->sh_entsize; | |
25dbc73a | 6644 | } |
c9594989 | 6645 | else if (elf_section_data (isec)->relocs != internal_relocs) |
9bc4e62b | 6646 | free (internal_relocs); |
252b5132 | 6647 | |
5446cbdf | 6648 | *again = changes != 0 || workaround_change; |
0a1b45a2 | 6649 | return true; |
25dbc73a AM |
6650 | |
6651 | error_return: | |
d3e454b9 | 6652 | while (branch_fixups != NULL) |
5446cbdf | 6653 | { |
d3e454b9 AM |
6654 | struct one_branch_fixup *f = branch_fixups; |
6655 | branch_fixups = branch_fixups->next; | |
5446cbdf AM |
6656 | free (f); |
6657 | } | |
c9594989 | 6658 | if ((unsigned char *) isymbuf != symtab_hdr->contents) |
25dbc73a | 6659 | free (isymbuf); |
c9594989 | 6660 | if (elf_section_data (isec)->this_hdr.contents != contents) |
25dbc73a | 6661 | free (contents); |
c9594989 | 6662 | if (elf_section_data (isec)->relocs != internal_relocs) |
25dbc73a | 6663 | free (internal_relocs); |
0a1b45a2 | 6664 | return false; |
252b5132 | 6665 | } |
252b5132 | 6666 | \f |
8a696751 AM |
6667 | /* What to do when ld finds relocations against symbols defined in |
6668 | discarded sections. */ | |
6669 | ||
6670 | static unsigned int | |
6671 | ppc_elf_action_discarded (asection *sec) | |
6672 | { | |
6673 | if (strcmp (".fixup", sec->name) == 0) | |
6674 | return 0; | |
6675 | ||
6676 | if (strcmp (".got2", sec->name) == 0) | |
6677 | return 0; | |
6678 | ||
6679 | return _bfd_elf_default_action_discarded (sec); | |
6680 | } | |
c9a2f333 | 6681 | \f |
25dbc73a | 6682 | /* Fill in the address for a pointer generated in a linker section. */ |
252b5132 | 6683 | |
25dbc73a | 6684 | static bfd_vma |
76750a2f | 6685 | elf_finish_pointer_linker_section (bfd *input_bfd, |
25dbc73a AM |
6686 | elf_linker_section_t *lsect, |
6687 | struct elf_link_hash_entry *h, | |
6688 | bfd_vma relocation, | |
2bb04cf2 | 6689 | const Elf_Internal_Rela *rel) |
25dbc73a AM |
6690 | { |
6691 | elf_linker_section_pointers_t *linker_section_ptr; | |
252b5132 | 6692 | |
25dbc73a | 6693 | BFD_ASSERT (lsect != NULL); |
252b5132 | 6694 | |
25dbc73a | 6695 | if (h != NULL) |
252b5132 | 6696 | { |
25dbc73a AM |
6697 | /* Handle global symbol. */ |
6698 | struct ppc_elf_link_hash_entry *eh; | |
252b5132 | 6699 | |
25dbc73a | 6700 | eh = (struct ppc_elf_link_hash_entry *) h; |
76750a2f AM |
6701 | BFD_ASSERT (eh->elf.def_regular); |
6702 | linker_section_ptr = eh->linker_section_pointer; | |
25dbc73a AM |
6703 | } |
6704 | else | |
6705 | { | |
6706 | /* Handle local symbol. */ | |
6707 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); | |
76750a2f | 6708 | |
0c8d6e5c | 6709 | BFD_ASSERT (is_ppc_elf (input_bfd)); |
25dbc73a | 6710 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); |
76750a2f AM |
6711 | linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; |
6712 | } | |
252b5132 | 6713 | |
76750a2f AM |
6714 | linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, |
6715 | rel->r_addend, | |
6716 | lsect); | |
6717 | BFD_ASSERT (linker_section_ptr != NULL); | |
25dbc73a | 6718 | |
76750a2f AM |
6719 | /* Offset will always be a multiple of four, so use the bottom bit |
6720 | as a "written" flag. */ | |
6721 | if ((linker_section_ptr->offset & 1) == 0) | |
6722 | { | |
6723 | bfd_put_32 (lsect->section->owner, | |
6724 | relocation + linker_section_ptr->addend, | |
6725 | lsect->section->contents + linker_section_ptr->offset); | |
6726 | linker_section_ptr->offset += 1; | |
252b5132 RH |
6727 | } |
6728 | ||
bd6c6e2b AM |
6729 | relocation = (lsect->section->output_section->vma |
6730 | + lsect->section->output_offset | |
76750a2f | 6731 | + linker_section_ptr->offset - 1 |
bd6c6e2b | 6732 | - SYM_VAL (lsect->sym)); |
252b5132 | 6733 | |
25dbc73a AM |
6734 | #ifdef DEBUG |
6735 | fprintf (stderr, | |
6736 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", | |
6737 | lsect->name, (long) relocation, (long) relocation); | |
6738 | #endif | |
252b5132 | 6739 | |
bd6c6e2b | 6740 | return relocation; |
252b5132 | 6741 | } |
25dbc73a | 6742 | |
e054468f AM |
6743 | #define PPC_LO(v) ((v) & 0xffff) |
6744 | #define PPC_HI(v) (((v) >> 16) & 0xffff) | |
6745 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) | |
6746 | ||
6747 | static void | |
9e390558 AM |
6748 | write_glink_stub (struct elf_link_hash_entry *h, struct plt_entry *ent, |
6749 | asection *plt_sec, unsigned char *p, | |
e054468f AM |
6750 | struct bfd_link_info *info) |
6751 | { | |
6752 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); | |
6753 | bfd *output_bfd = info->output_bfd; | |
6754 | bfd_vma plt; | |
9e390558 AM |
6755 | unsigned char *end = p + GLINK_ENTRY_SIZE (htab, h); |
6756 | ||
6757 | if (h != NULL | |
6758 | && h == htab->tls_get_addr | |
6759 | && !htab->params->no_tls_get_addr_opt) | |
6760 | { | |
6761 | bfd_put_32 (output_bfd, LWZ_11_3, p); | |
6762 | p += 4; | |
6763 | bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); | |
6764 | p += 4; | |
6765 | bfd_put_32 (output_bfd, MR_0_3, p); | |
6766 | p += 4; | |
6767 | bfd_put_32 (output_bfd, CMPWI_11_0, p); | |
6768 | p += 4; | |
6769 | bfd_put_32 (output_bfd, ADD_3_12_2, p); | |
6770 | p += 4; | |
6771 | bfd_put_32 (output_bfd, BEQLR, p); | |
6772 | p += 4; | |
6773 | bfd_put_32 (output_bfd, MR_3_0, p); | |
6774 | p += 4; | |
6775 | bfd_put_32 (output_bfd, NOP, p); | |
6776 | p += 4; | |
6777 | } | |
e054468f AM |
6778 | |
6779 | plt = ((ent->plt.offset & ~1) | |
6780 | + plt_sec->output_section->vma | |
6781 | + plt_sec->output_offset); | |
e054468f | 6782 | |
0e1862bb | 6783 | if (bfd_link_pic (info)) |
e054468f AM |
6784 | { |
6785 | bfd_vma got = 0; | |
6786 | ||
6787 | if (ent->addend >= 32768) | |
6788 | got = (ent->addend | |
6789 | + ent->sec->output_section->vma | |
6790 | + ent->sec->output_offset); | |
6791 | else if (htab->elf.hgot != NULL) | |
6792 | got = SYM_VAL (htab->elf.hgot); | |
6793 | ||
6794 | plt -= got; | |
6795 | ||
6796 | if (plt + 0x8000 < 0x10000) | |
9e390558 | 6797 | bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); |
e054468f AM |
6798 | else |
6799 | { | |
6800 | bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); | |
6801 | p += 4; | |
6802 | bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); | |
e054468f AM |
6803 | } |
6804 | } | |
6805 | else | |
6806 | { | |
6807 | bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); | |
6808 | p += 4; | |
6809 | bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); | |
9e390558 AM |
6810 | } |
6811 | p += 4; | |
6812 | bfd_put_32 (output_bfd, MTCTR_11, p); | |
6813 | p += 4; | |
407aa07c AM |
6814 | bfd_put_32 (output_bfd, BCTR, p); |
6815 | p += 4; | |
9e390558 AM |
6816 | while (p < end) |
6817 | { | |
6818 | bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p); | |
e054468f AM |
6819 | p += 4; |
6820 | } | |
6821 | } | |
6822 | ||
bd6c6e2b AM |
6823 | /* Return true if symbol is defined statically. */ |
6824 | ||
0a1b45a2 | 6825 | static bool |
bd6c6e2b AM |
6826 | is_static_defined (struct elf_link_hash_entry *h) |
6827 | { | |
6828 | return ((h->root.type == bfd_link_hash_defined | |
6829 | || h->root.type == bfd_link_hash_defweak) | |
6830 | && h->root.u.def.section != NULL | |
6831 | && h->root.u.def.section->output_section != NULL); | |
6832 | } | |
6833 | ||
2d0f3896 AM |
6834 | /* If INSN is an opcode that may be used with an @tls operand, return |
6835 | the transformed insn for TLS optimisation, otherwise return 0. If | |
6836 | REG is non-zero only match an insn with RB or RA equal to REG. */ | |
6837 | ||
6838 | unsigned int | |
6839 | _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) | |
6840 | { | |
6841 | unsigned int rtra; | |
6842 | ||
2365f8d7 | 6843 | if ((insn & (0x3fu << 26)) != 31 << 26) |
2d0f3896 AM |
6844 | return 0; |
6845 | ||
6846 | if (reg == 0 || ((insn >> 11) & 0x1f) == reg) | |
6847 | rtra = insn & ((1 << 26) - (1 << 16)); | |
6848 | else if (((insn >> 16) & 0x1f) == reg) | |
6849 | rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); | |
6850 | else | |
6851 | return 0; | |
6852 | ||
6853 | if ((insn & (0x3ff << 1)) == 266 << 1) | |
6854 | /* add -> addi. */ | |
6855 | insn = 14 << 26; | |
6856 | else if ((insn & (0x1f << 1)) == 23 << 1 | |
6857 | && ((insn & (0x1f << 6)) < 14 << 6 | |
6858 | || ((insn & (0x1f << 6)) >= 16 << 6 | |
6859 | && (insn & (0x1f << 6)) < 24 << 6))) | |
6860 | /* load and store indexed -> dform. */ | |
2365f8d7 | 6861 | insn = (32u | ((insn >> 6) & 0x1f)) << 26; |
2d0f3896 AM |
6862 | else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) |
6863 | /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ | |
2365f8d7 | 6864 | insn = ((58u | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); |
2d0f3896 AM |
6865 | else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) |
6866 | /* lwax -> lwa. */ | |
2365f8d7 | 6867 | insn = (58u << 26) | 2; |
2d0f3896 AM |
6868 | else |
6869 | return 0; | |
6870 | insn |= rtra; | |
6871 | return insn; | |
6872 | } | |
6873 | ||
766bc656 AM |
6874 | /* If INSN is an opcode that may be used with an @tprel operand, return |
6875 | the transformed insn for an undefined weak symbol, ie. with the | |
6876 | thread pointer REG operand removed. Otherwise return 0. */ | |
6877 | ||
6878 | unsigned int | |
6879 | _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) | |
6880 | { | |
6881 | if ((insn & (0x1f << 16)) == reg << 16 | |
2365f8d7 AM |
6882 | && ((insn & (0x3fu << 26)) == 14u << 26 /* addi */ |
6883 | || (insn & (0x3fu << 26)) == 15u << 26 /* addis */ | |
6884 | || (insn & (0x3fu << 26)) == 32u << 26 /* lwz */ | |
6885 | || (insn & (0x3fu << 26)) == 34u << 26 /* lbz */ | |
6886 | || (insn & (0x3fu << 26)) == 36u << 26 /* stw */ | |
6887 | || (insn & (0x3fu << 26)) == 38u << 26 /* stb */ | |
6888 | || (insn & (0x3fu << 26)) == 40u << 26 /* lhz */ | |
6889 | || (insn & (0x3fu << 26)) == 42u << 26 /* lha */ | |
6890 | || (insn & (0x3fu << 26)) == 44u << 26 /* sth */ | |
6891 | || (insn & (0x3fu << 26)) == 46u << 26 /* lmw */ | |
6892 | || (insn & (0x3fu << 26)) == 47u << 26 /* stmw */ | |
6893 | || (insn & (0x3fu << 26)) == 48u << 26 /* lfs */ | |
6894 | || (insn & (0x3fu << 26)) == 50u << 26 /* lfd */ | |
6895 | || (insn & (0x3fu << 26)) == 52u << 26 /* stfs */ | |
6896 | || (insn & (0x3fu << 26)) == 54u << 26 /* stfd */ | |
6897 | || ((insn & (0x3fu << 26)) == 58u << 26 /* lwa,ld,lmd */ | |
766bc656 | 6898 | && (insn & 3) != 1) |
2365f8d7 | 6899 | || ((insn & (0x3fu << 26)) == 62u << 26 /* std, stmd */ |
766bc656 AM |
6900 | && ((insn & 3) == 0 || (insn & 3) == 3)))) |
6901 | { | |
6902 | insn &= ~(0x1f << 16); | |
6903 | } | |
6904 | else if ((insn & (0x1f << 21)) == reg << 21 | |
2365f8d7 AM |
6905 | && ((insn & (0x3eu << 26)) == 24u << 26 /* ori, oris */ |
6906 | || (insn & (0x3eu << 26)) == 26u << 26 /* xori,xoris */ | |
6907 | || (insn & (0x3eu << 26)) == 28u << 26 /* andi,andis */)) | |
766bc656 AM |
6908 | { |
6909 | insn &= ~(0x1f << 21); | |
6910 | insn |= (insn & (0x1f << 16)) << 5; | |
2365f8d7 | 6911 | if ((insn & (0x3eu << 26)) == 26u << 26 /* xori,xoris */) |
766bc656 AM |
6912 | insn -= 2 >> 26; /* convert to ori,oris */ |
6913 | } | |
6914 | else | |
6915 | insn = 0; | |
6916 | return insn; | |
6917 | } | |
6918 | ||
0a1b45a2 | 6919 | static bool |
1fe532cf AM |
6920 | is_insn_ds_form (unsigned int insn) |
6921 | { | |
2365f8d7 AM |
6922 | return ((insn & (0x3fu << 26)) == 58u << 26 /* ld,ldu,lwa */ |
6923 | || (insn & (0x3fu << 26)) == 62u << 26 /* std,stdu,stq */ | |
6924 | || (insn & (0x3fu << 26)) == 57u << 26 /* lfdp */ | |
6925 | || (insn & (0x3fu << 26)) == 61u << 26 /* stfdp */); | |
1fe532cf AM |
6926 | } |
6927 | ||
0a1b45a2 | 6928 | static bool |
1fe532cf AM |
6929 | is_insn_dq_form (unsigned int insn) |
6930 | { | |
2365f8d7 AM |
6931 | return ((insn & (0x3fu << 26)) == 56u << 26 /* lq */ |
6932 | || ((insn & (0x3fu << 26)) == (61u << 26) /* lxv, stxv */ | |
a680de9a | 6933 | && (insn & 3) == 1)); |
1fe532cf AM |
6934 | } |
6935 | ||
252b5132 RH |
6936 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
6937 | to handle the relocations for a section. | |
6938 | ||
6939 | The relocs are always passed as Rela structures; if the section | |
6940 | actually uses Rel structures, the r_addend field will always be | |
6941 | zero. | |
6942 | ||
6943 | This function is responsible for adjust the section contents as | |
6944 | necessary, and (if using Rela relocs and generating a | |
1049f94e | 6945 | relocatable output file) adjusting the reloc addend as |
252b5132 RH |
6946 | necessary. |
6947 | ||
6948 | This function does not have to worry about setting the reloc | |
6949 | address or the reloc symbol index. | |
6950 | ||
6951 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
6952 | ||
6953 | LOCAL_SECTIONS is an array giving the section in the input file | |
6954 | corresponding to the st_shndx field of each local symbol. | |
6955 | ||
6956 | The global hash table entry for the global symbols can be found | |
6957 | via elf_sym_hashes (input_bfd). | |
6958 | ||
1049f94e | 6959 | When generating relocatable output, this function must handle |
252b5132 RH |
6960 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
6961 | going to be the section symbol corresponding to the output | |
6962 | section, which means that the addend must be adjusted | |
6963 | accordingly. */ | |
6964 | ||
0f684201 | 6965 | static int |
55fd94b0 AM |
6966 | ppc_elf_relocate_section (bfd *output_bfd, |
6967 | struct bfd_link_info *info, | |
6968 | bfd *input_bfd, | |
6969 | asection *input_section, | |
6970 | bfd_byte *contents, | |
6971 | Elf_Internal_Rela *relocs, | |
6972 | Elf_Internal_Sym *local_syms, | |
6973 | asection **local_sections) | |
252b5132 | 6974 | { |
7619e7c7 AM |
6975 | Elf_Internal_Shdr *symtab_hdr; |
6976 | struct elf_link_hash_entry **sym_hashes; | |
6977 | struct ppc_elf_link_hash_table *htab; | |
6978 | Elf_Internal_Rela *rel; | |
c316a17c | 6979 | Elf_Internal_Rela *wrel; |
7619e7c7 AM |
6980 | Elf_Internal_Rela *relend; |
6981 | Elf_Internal_Rela outrel; | |
f95f8542 | 6982 | asection *got2; |
252b5132 | 6983 | bfd_vma *local_got_offsets; |
0a1b45a2 | 6984 | bool ret = true; |
95f0d0d2 | 6985 | bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0); |
0a1b45a2 | 6986 | bool is_vxworks_tls; |
d3e454b9 AM |
6987 | unsigned int picfixup_size = 0; |
6988 | struct ppc_elf_relax_info *relax_info = NULL; | |
b34976b6 | 6989 | |
252b5132 | 6990 | #ifdef DEBUG |
871b3ab2 | 6991 | _bfd_error_handler ("ppc_elf_relocate_section called for %pB section %pA, " |
d003868e AM |
6992 | "%ld relocations%s", |
6993 | input_bfd, input_section, | |
6994 | (long) input_section->reloc_count, | |
0e1862bb | 6995 | (bfd_link_relocatable (info)) ? " (relocatable)" : ""); |
252b5132 RH |
6996 | #endif |
6997 | ||
7af5d5c4 AM |
6998 | if (!is_ppc_elf (input_bfd)) |
6999 | { | |
7000 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 7001 | return false; |
7af5d5c4 AM |
7002 | } |
7003 | ||
a6aa5195 AM |
7004 | got2 = bfd_get_section_by_name (input_bfd, ".got2"); |
7005 | ||
e47cd125 | 7006 | /* Initialize howto table if not already done. */ |
8da6118f | 7007 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
252b5132 RH |
7008 | ppc_elf_howto_init (); |
7009 | ||
7619e7c7 | 7010 | htab = ppc_elf_hash_table (info); |
252b5132 | 7011 | local_got_offsets = elf_local_got_offsets (input_bfd); |
0ffa91dd | 7012 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
7619e7c7 | 7013 | sym_hashes = elf_sym_hashes (input_bfd); |
3348747a NS |
7014 | /* We have to handle relocations in vxworks .tls_vars sections |
7015 | specially, because the dynamic loader is 'weird'. */ | |
90c14f0c | 7016 | is_vxworks_tls = (htab->elf.target_os == is_vxworks && bfd_link_pic (info) |
3348747a NS |
7017 | && !strcmp (input_section->output_section->name, |
7018 | ".tls_vars")); | |
d3e454b9 AM |
7019 | if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET) |
7020 | relax_info = elf_section_data (input_section)->sec_info; | |
c316a17c | 7021 | rel = wrel = relocs; |
7619e7c7 | 7022 | relend = relocs + input_section->reloc_count; |
c316a17c | 7023 | for (; rel < relend; wrel++, rel++) |
252b5132 | 7024 | { |
7619e7c7 AM |
7025 | enum elf_ppc_reloc_type r_type; |
7026 | bfd_vma addend; | |
7027 | bfd_reloc_status_type r; | |
7028 | Elf_Internal_Sym *sym; | |
7029 | asection *sec; | |
7030 | struct elf_link_hash_entry *h; | |
7031 | const char *sym_name; | |
252b5132 RH |
7032 | reloc_howto_type *howto; |
7033 | unsigned long r_symndx; | |
7034 | bfd_vma relocation; | |
91d6fa6a | 7035 | bfd_vma branch_bit, from; |
0a1b45a2 AM |
7036 | bool unresolved_reloc, save_unresolved_reloc; |
7037 | bool warned; | |
7619e7c7 | 7038 | unsigned int tls_type, tls_mask, tls_gd; |
08be3224 | 7039 | struct plt_entry **ifunc, **plt_list; |
86c95733 | 7040 | struct reloc_howto_struct alt_howto; |
7619e7c7 | 7041 | |
c316a17c | 7042 | again: |
55fd94b0 AM |
7043 | r_type = ELF32_R_TYPE (rel->r_info); |
7044 | sym = NULL; | |
7045 | sec = NULL; | |
7046 | h = NULL; | |
0a1b45a2 AM |
7047 | unresolved_reloc = false; |
7048 | warned = false; | |
252b5132 | 7049 | r_symndx = ELF32_R_SYM (rel->r_info); |
560e09e9 | 7050 | |
252b5132 RH |
7051 | if (r_symndx < symtab_hdr->sh_info) |
7052 | { | |
7053 | sym = local_syms + r_symndx; | |
7054 | sec = local_sections[r_symndx]; | |
26c61ae5 | 7055 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
252b5132 | 7056 | |
8517fae7 | 7057 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
252b5132 RH |
7058 | } |
7059 | else | |
7060 | { | |
0a1b45a2 | 7061 | bool ignored; |
62d887d4 | 7062 | |
b2a8e766 AM |
7063 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
7064 | r_symndx, symtab_hdr, sym_hashes, | |
7065 | h, sec, relocation, | |
62d887d4 | 7066 | unresolved_reloc, warned, ignored); |
9abc968f | 7067 | |
252b5132 | 7068 | sym_name = h->root.root.string; |
7619e7c7 AM |
7069 | } |
7070 | ||
dbaa2011 | 7071 | if (sec != NULL && discarded_section (sec)) |
ab96bf03 AM |
7072 | { |
7073 | /* For relocs against symbols from removed linkonce sections, | |
7074 | or sections discarded by a linker script, we just want the | |
7075 | section contents zeroed. Avoid any special processing. */ | |
7076 | howto = NULL; | |
7077 | if (r_type < R_PPC_max) | |
7078 | howto = ppc_elf_howto_table[r_type]; | |
c316a17c AM |
7079 | |
7080 | _bfd_clear_contents (howto, input_bfd, input_section, | |
0930cb30 | 7081 | contents, rel->r_offset); |
c316a17c AM |
7082 | wrel->r_offset = rel->r_offset; |
7083 | wrel->r_info = 0; | |
7084 | wrel->r_addend = 0; | |
7085 | ||
7086 | /* For ld -r, remove relocations in debug sections against | |
dcd2b8a0 | 7087 | symbols defined in discarded sections. Not done for |
c316a17c AM |
7088 | non-debug to preserve relocs in .eh_frame which the |
7089 | eh_frame editing code expects to be present. */ | |
7090 | if (bfd_link_relocatable (info) | |
7091 | && (input_section->flags & SEC_DEBUGGING)) | |
7092 | wrel--; | |
7093 | ||
7094 | continue; | |
ab96bf03 AM |
7095 | } |
7096 | ||
0e1862bb | 7097 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
7098 | { |
7099 | if (got2 != NULL | |
7100 | && r_type == R_PPC_PLTREL24 | |
f75e0e33 | 7101 | && rel->r_addend != 0) |
ab96bf03 AM |
7102 | { |
7103 | /* R_PPC_PLTREL24 is rather special. If non-zero, the | |
7104 | addend specifies the GOT pointer offset within .got2. */ | |
7105 | rel->r_addend += got2->output_offset; | |
7106 | } | |
53291d1f AM |
7107 | if (r_type != R_PPC_RELAX_PLT |
7108 | && r_type != R_PPC_RELAX_PLTREL24 | |
7109 | && r_type != R_PPC_RELAX) | |
c316a17c | 7110 | goto copy_reloc; |
ab96bf03 AM |
7111 | } |
7112 | ||
7619e7c7 AM |
7113 | /* TLS optimizations. Replace instruction sequences and relocs |
7114 | based on information we collected in tls_optimize. We edit | |
7115 | RELOCS so that --emit-relocs will output something sensible | |
7116 | for the final instruction stream. */ | |
7117 | tls_mask = 0; | |
7118 | tls_gd = 0; | |
727fc41e AM |
7119 | if (h != NULL) |
7120 | tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; | |
7121 | else if (local_got_offsets != NULL) | |
7619e7c7 | 7122 | { |
e054468f | 7123 | struct plt_entry **local_plt; |
727fc41e | 7124 | char *lgot_masks; |
e054468f AM |
7125 | local_plt |
7126 | = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); | |
7127 | lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); | |
727fc41e | 7128 | tls_mask = lgot_masks[r_symndx]; |
7619e7c7 AM |
7129 | } |
7130 | ||
7131 | /* Ensure reloc mapping code below stays sane. */ | |
7132 | if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) | |
7133 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) | |
7134 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) | |
7135 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) | |
7136 | || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) | |
7137 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) | |
7138 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) | |
7139 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) | |
7140 | abort (); | |
7141 | switch (r_type) | |
7142 | { | |
7143 | default: | |
7144 | break; | |
7145 | ||
7146 | case R_PPC_GOT_TPREL16: | |
7147 | case R_PPC_GOT_TPREL16_LO: | |
e054468f | 7148 | if ((tls_mask & TLS_TLS) != 0 |
e7776f52 AM |
7149 | && (tls_mask & TLS_TPREL) == 0 |
7150 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) | |
7619e7c7 AM |
7151 | { |
7152 | bfd_vma insn; | |
91d6fa6a | 7153 | |
95f0d0d2 | 7154 | insn = bfd_get_32 (input_bfd, |
c316a17c | 7155 | contents + rel->r_offset - d_offset); |
7619e7c7 AM |
7156 | insn &= 31 << 21; |
7157 | insn |= 0x3c020000; /* addis 0,2,0 */ | |
95f0d0d2 | 7158 | bfd_put_32 (input_bfd, insn, |
c316a17c | 7159 | contents + rel->r_offset - d_offset); |
7619e7c7 AM |
7160 | r_type = R_PPC_TPREL16_HA; |
7161 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
7162 | } | |
7163 | break; | |
7164 | ||
7165 | case R_PPC_TLS: | |
e054468f | 7166 | if ((tls_mask & TLS_TLS) != 0 |
e7776f52 AM |
7167 | && (tls_mask & TLS_TPREL) == 0 |
7168 | && offset_in_range (input_section, rel->r_offset, 4)) | |
7619e7c7 | 7169 | { |
2d0f3896 AM |
7170 | bfd_vma insn; |
7171 | ||
95f0d0d2 | 7172 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
2d0f3896 AM |
7173 | insn = _bfd_elf_ppc_at_tls_transform (insn, 2); |
7174 | if (insn == 0) | |
7619e7c7 | 7175 | abort (); |
95f0d0d2 | 7176 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
7619e7c7 AM |
7177 | r_type = R_PPC_TPREL16_LO; |
7178 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
4fe5ca5b | 7179 | |
7619e7c7 | 7180 | /* Was PPC_TLS which sits on insn boundary, now |
4fe5ca5b GM |
7181 | PPC_TPREL16_LO which is at low-order half-word. */ |
7182 | rel->r_offset += d_offset; | |
7619e7c7 AM |
7183 | } |
7184 | break; | |
7185 | ||
7186 | case R_PPC_GOT_TLSGD16_HI: | |
7187 | case R_PPC_GOT_TLSGD16_HA: | |
b00a0a86 | 7188 | tls_gd = TLS_GDIE; |
e7776f52 AM |
7189 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
7190 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) | |
7619e7c7 AM |
7191 | goto tls_gdld_hi; |
7192 | break; | |
7193 | ||
7194 | case R_PPC_GOT_TLSLD16_HI: | |
7195 | case R_PPC_GOT_TLSLD16_HA: | |
e7776f52 AM |
7196 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
7197 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) | |
7619e7c7 AM |
7198 | { |
7199 | tls_gdld_hi: | |
7200 | if ((tls_mask & tls_gd) != 0) | |
7201 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) | |
7202 | + R_PPC_GOT_TPREL16); | |
7203 | else | |
7204 | { | |
4fe5ca5b | 7205 | rel->r_offset -= d_offset; |
95f0d0d2 | 7206 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
7619e7c7 AM |
7207 | r_type = R_PPC_NONE; |
7208 | } | |
7209 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
7210 | } | |
7211 | break; | |
7212 | ||
7213 | case R_PPC_GOT_TLSGD16: | |
7214 | case R_PPC_GOT_TLSGD16_LO: | |
b00a0a86 | 7215 | tls_gd = TLS_GDIE; |
e7776f52 AM |
7216 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
7217 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) | |
b7fcf6f6 | 7218 | goto tls_ldgd_opt; |
7619e7c7 AM |
7219 | break; |
7220 | ||
7221 | case R_PPC_GOT_TLSLD16: | |
7222 | case R_PPC_GOT_TLSLD16_LO: | |
e7776f52 AM |
7223 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
7224 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) | |
7619e7c7 | 7225 | { |
3a71aa26 | 7226 | unsigned int insn1, insn2; |
b7fcf6f6 | 7227 | bfd_vma offset; |
7619e7c7 | 7228 | |
b7fcf6f6 | 7229 | tls_ldgd_opt: |
727fc41e AM |
7230 | offset = (bfd_vma) -1; |
7231 | /* If not using the newer R_PPC_TLSGD/LD to mark | |
7232 | __tls_get_addr calls, we must trust that the call | |
7233 | stays with its arg setup insns, ie. that the next | |
7234 | reloc is the __tls_get_addr call associated with | |
7235 | the current reloc. Edit both insns. */ | |
9737e8af | 7236 | if (input_section->nomark_tls_get_addr |
727fc41e AM |
7237 | && rel + 1 < relend |
7238 | && branch_reloc_hash_match (input_bfd, rel + 1, | |
7239 | htab->tls_get_addr)) | |
7240 | offset = rel[1].r_offset; | |
b86ac8e3 AM |
7241 | /* We read the low GOT_TLS insn because we need to keep |
7242 | the destination reg. It may be something other than | |
7243 | the usual r3, and moved to r3 before the call by | |
7244 | intervening code. */ | |
95f0d0d2 | 7245 | insn1 = bfd_get_32 (input_bfd, |
b86ac8e3 | 7246 | contents + rel->r_offset - d_offset); |
b7fcf6f6 AM |
7247 | if ((tls_mask & tls_gd) != 0) |
7248 | { | |
7249 | /* IE */ | |
b86ac8e3 | 7250 | insn1 &= (0x1f << 21) | (0x1f << 16); |
2365f8d7 | 7251 | insn1 |= 32u << 26; /* lwz */ |
e7776f52 AM |
7252 | if (offset != (bfd_vma) -1 |
7253 | && offset_in_range (input_section, offset, 4)) | |
727fc41e | 7254 | { |
f58d5a2d | 7255 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
727fc41e | 7256 | insn2 = 0x7c631214; /* add 3,3,2 */ |
95f0d0d2 | 7257 | bfd_put_32 (input_bfd, insn2, contents + offset); |
727fc41e | 7258 | } |
b7fcf6f6 AM |
7259 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
7260 | + R_PPC_GOT_TPREL16); | |
7261 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
7262 | } | |
7263 | else | |
7264 | { | |
7265 | /* LE */ | |
b86ac8e3 AM |
7266 | insn1 &= 0x1f << 21; |
7267 | insn1 |= 0x3c020000; /* addis r,2,0 */ | |
7619e7c7 AM |
7268 | if (tls_gd == 0) |
7269 | { | |
b7fcf6f6 | 7270 | /* Was an LD reloc. */ |
1d483afe AM |
7271 | for (r_symndx = 0; |
7272 | r_symndx < symtab_hdr->sh_info; | |
7273 | r_symndx++) | |
7274 | if (local_sections[r_symndx] == sec) | |
7275 | break; | |
7276 | if (r_symndx >= symtab_hdr->sh_info) | |
cf35638d | 7277 | r_symndx = STN_UNDEF; |
b7fcf6f6 | 7278 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
cf35638d | 7279 | if (r_symndx != STN_UNDEF) |
1d483afe AM |
7280 | rel->r_addend -= (local_syms[r_symndx].st_value |
7281 | + sec->output_offset | |
7282 | + sec->output_section->vma); | |
7619e7c7 | 7283 | } |
b7fcf6f6 AM |
7284 | r_type = R_PPC_TPREL16_HA; |
7285 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
e7776f52 AM |
7286 | if (offset != (bfd_vma) -1 |
7287 | && offset_in_range (input_section, offset, 4)) | |
727fc41e AM |
7288 | { |
7289 | rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); | |
7290 | rel[1].r_offset = offset + d_offset; | |
7291 | rel[1].r_addend = rel->r_addend; | |
7292 | insn2 = 0x38630000; /* addi 3,3,0 */ | |
95f0d0d2 | 7293 | bfd_put_32 (input_bfd, insn2, contents + offset); |
727fc41e | 7294 | } |
b7fcf6f6 | 7295 | } |
95f0d0d2 | 7296 | bfd_put_32 (input_bfd, insn1, |
b7fcf6f6 | 7297 | contents + rel->r_offset - d_offset); |
b7fcf6f6 AM |
7298 | if (tls_gd == 0) |
7299 | { | |
7300 | /* We changed the symbol on an LD reloc. Start over | |
7301 | in order to get h, sym, sec etc. right. */ | |
c316a17c | 7302 | goto again; |
7619e7c7 | 7303 | } |
252b5132 | 7304 | } |
7619e7c7 | 7305 | break; |
727fc41e AM |
7306 | |
7307 | case R_PPC_TLSGD: | |
675e2809 | 7308 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
e7776f52 AM |
7309 | && rel + 1 < relend |
7310 | && offset_in_range (input_section, rel->r_offset, 4)) | |
727fc41e AM |
7311 | { |
7312 | unsigned int insn2; | |
7313 | bfd_vma offset = rel->r_offset; | |
7314 | ||
23cedd1d AM |
7315 | if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info))) |
7316 | { | |
7317 | bfd_put_32 (input_bfd, NOP, contents + offset); | |
7318 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); | |
7319 | break; | |
7320 | } | |
7321 | ||
b00a0a86 | 7322 | if ((tls_mask & TLS_GDIE) != 0) |
727fc41e AM |
7323 | { |
7324 | /* IE */ | |
7325 | r_type = R_PPC_NONE; | |
7326 | insn2 = 0x7c631214; /* add 3,3,2 */ | |
7327 | } | |
7328 | else | |
7329 | { | |
7330 | /* LE */ | |
7331 | r_type = R_PPC_TPREL16_LO; | |
7332 | rel->r_offset += d_offset; | |
7333 | insn2 = 0x38630000; /* addi 3,3,0 */ | |
7334 | } | |
7335 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
95f0d0d2 | 7336 | bfd_put_32 (input_bfd, insn2, contents + offset); |
727fc41e AM |
7337 | /* Zap the reloc on the _tls_get_addr call too. */ |
7338 | BFD_ASSERT (offset == rel[1].r_offset); | |
f58d5a2d | 7339 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
727fc41e AM |
7340 | } |
7341 | break; | |
7342 | ||
7343 | case R_PPC_TLSLD: | |
675e2809 | 7344 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
e7776f52 AM |
7345 | && rel + 1 < relend |
7346 | && offset_in_range (input_section, rel->r_offset, 4)) | |
727fc41e AM |
7347 | { |
7348 | unsigned int insn2; | |
7349 | ||
23cedd1d AM |
7350 | if (is_plt_seq_reloc (ELF32_R_TYPE (rel[1].r_info))) |
7351 | { | |
7352 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); | |
7353 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); | |
7354 | break; | |
7355 | } | |
7356 | ||
727fc41e AM |
7357 | for (r_symndx = 0; |
7358 | r_symndx < symtab_hdr->sh_info; | |
7359 | r_symndx++) | |
7360 | if (local_sections[r_symndx] == sec) | |
7361 | break; | |
7362 | if (r_symndx >= symtab_hdr->sh_info) | |
cf35638d | 7363 | r_symndx = STN_UNDEF; |
727fc41e | 7364 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
cf35638d | 7365 | if (r_symndx != STN_UNDEF) |
727fc41e AM |
7366 | rel->r_addend -= (local_syms[r_symndx].st_value |
7367 | + sec->output_offset | |
7368 | + sec->output_section->vma); | |
7369 | ||
7370 | rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); | |
7371 | rel->r_offset += d_offset; | |
7372 | insn2 = 0x38630000; /* addi 3,3,0 */ | |
95f0d0d2 | 7373 | bfd_put_32 (input_bfd, insn2, |
727fc41e AM |
7374 | contents + rel->r_offset - d_offset); |
7375 | /* Zap the reloc on the _tls_get_addr call too. */ | |
7376 | BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); | |
f58d5a2d | 7377 | rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); |
c316a17c | 7378 | goto again; |
727fc41e AM |
7379 | } |
7380 | break; | |
7619e7c7 AM |
7381 | } |
7382 | ||
7383 | /* Handle other relocations that tweak non-addend part of insn. */ | |
7384 | branch_bit = 0; | |
7385 | switch (r_type) | |
7386 | { | |
7387 | default: | |
7388 | break; | |
7389 | ||
7390 | /* Branch taken prediction relocations. */ | |
7391 | case R_PPC_ADDR14_BRTAKEN: | |
7392 | case R_PPC_REL14_BRTAKEN: | |
7393 | branch_bit = BRANCH_PREDICT_BIT; | |
1a0670f3 | 7394 | /* Fall through. */ |
7619e7c7 | 7395 | |
4cc11e76 | 7396 | /* Branch not taken prediction relocations. */ |
7619e7c7 AM |
7397 | case R_PPC_ADDR14_BRNTAKEN: |
7398 | case R_PPC_REL14_BRNTAKEN: | |
e7776f52 AM |
7399 | if (offset_in_range (input_section, rel->r_offset, 4)) |
7400 | { | |
7401 | unsigned int insn; | |
7619e7c7 | 7402 | |
e7776f52 AM |
7403 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
7404 | insn &= ~BRANCH_PREDICT_BIT; | |
7405 | insn |= branch_bit; | |
7619e7c7 | 7406 | |
e7776f52 AM |
7407 | from = (rel->r_offset |
7408 | + input_section->output_offset | |
7409 | + input_section->output_section->vma); | |
7619e7c7 | 7410 | |
e7776f52 AM |
7411 | /* Invert 'y' bit if not the default. */ |
7412 | if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) | |
7413 | insn ^= BRANCH_PREDICT_BIT; | |
91d6fa6a | 7414 | |
e7776f52 AM |
7415 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
7416 | } | |
08be3224 AM |
7417 | break; |
7418 | ||
7419 | case R_PPC_PLT16_HA: | |
e7776f52 AM |
7420 | if (offset_in_range (input_section, rel->r_offset - d_offset, 4)) |
7421 | { | |
7422 | unsigned int insn; | |
08be3224 | 7423 | |
e7776f52 AM |
7424 | insn = bfd_get_32 (input_bfd, |
7425 | contents + rel->r_offset - d_offset); | |
7426 | if ((insn & (0x3fu << 26)) == 15u << 26 | |
7427 | && (insn & (0x1f << 16)) != 0) | |
7428 | { | |
7429 | if (!bfd_link_pic (info)) | |
7430 | { | |
7431 | /* Convert addis to lis. */ | |
7432 | insn &= ~(0x1f << 16); | |
7433 | bfd_put_32 (input_bfd, insn, | |
7434 | contents + rel->r_offset - d_offset); | |
7435 | } | |
7436 | } | |
7437 | else if (bfd_link_pic (info)) | |
7438 | info->callbacks->einfo | |
7439 | (_("%P: %H: error: %s with unexpected instruction %x\n"), | |
7440 | input_bfd, input_section, rel->r_offset, | |
7441 | "R_PPC_PLT16_HA", insn); | |
7442 | } | |
08be3224 | 7443 | break; |
252b5132 RH |
7444 | } |
7445 | ||
d3e454b9 AM |
7446 | if (ELIMINATE_COPY_RELOCS |
7447 | && h != NULL | |
7448 | && !h->def_regular | |
7449 | && h->protected_def | |
7450 | && ppc_elf_hash_entry (h)->has_addr16_ha | |
7451 | && ppc_elf_hash_entry (h)->has_addr16_lo | |
7452 | && htab->params->pic_fixup > 0) | |
7453 | { | |
7454 | /* Convert lis;addi or lis;load/store accessing a protected | |
7455 | variable defined in a shared library to PIC. */ | |
7456 | unsigned int insn; | |
7457 | ||
e7776f52 AM |
7458 | if (r_type == R_PPC_ADDR16_HA |
7459 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) | |
d3e454b9 | 7460 | { |
95f0d0d2 | 7461 | insn = bfd_get_32 (input_bfd, |
d3e454b9 | 7462 | contents + rel->r_offset - d_offset); |
2365f8d7 | 7463 | if ((insn & (0x3fu << 26)) == (15u << 26) |
d3e454b9 AM |
7464 | && (insn & (0x1f << 16)) == 0 /* lis */) |
7465 | { | |
7466 | bfd_byte *p; | |
7467 | bfd_vma off; | |
7468 | bfd_vma got_addr; | |
7469 | ||
7470 | p = (contents + input_section->size | |
7471 | - relax_info->workaround_size | |
7472 | - relax_info->picfixup_size | |
7473 | + picfixup_size); | |
7474 | off = (p - contents) - (rel->r_offset - d_offset); | |
7475 | if (off > 0x1fffffc || (off & 3) != 0) | |
7476 | info->callbacks->einfo | |
174d0a74 | 7477 | (_("%H: fixup branch overflow\n"), |
d3e454b9 AM |
7478 | input_bfd, input_section, rel->r_offset); |
7479 | ||
95f0d0d2 | 7480 | bfd_put_32 (input_bfd, B | off, |
d3e454b9 | 7481 | contents + rel->r_offset - d_offset); |
ce558b89 AM |
7482 | got_addr = (htab->elf.sgot->output_section->vma |
7483 | + htab->elf.sgot->output_offset | |
d3e454b9 | 7484 | + (h->got.offset & ~1)); |
c316a17c AM |
7485 | wrel->r_offset = (p - contents) + d_offset; |
7486 | wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA); | |
7487 | wrel->r_addend = got_addr; | |
d3e454b9 | 7488 | insn &= ~0xffff; |
4aef7643 | 7489 | insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff; |
95f0d0d2 | 7490 | bfd_put_32 (input_bfd, insn, p); |
d3e454b9 AM |
7491 | |
7492 | /* Convert lis to lwz, loading address from GOT. */ | |
7493 | insn &= ~0xffff; | |
7494 | insn ^= (32u ^ 15u) << 26; | |
7495 | insn |= (insn & (0x1f << 21)) >> 5; | |
7496 | insn |= got_addr & 0xffff; | |
95f0d0d2 | 7497 | bfd_put_32 (input_bfd, insn, p + 4); |
d3e454b9 | 7498 | |
95f0d0d2 | 7499 | bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8); |
d3e454b9 AM |
7500 | picfixup_size += 12; |
7501 | ||
7502 | /* Use one of the spare relocs, so --emit-relocs | |
7503 | output is reasonable. */ | |
7504 | memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); | |
c316a17c AM |
7505 | wrel++, rel++; |
7506 | rel->r_offset = wrel[-1].r_offset + 4; | |
d3e454b9 | 7507 | rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO); |
c316a17c | 7508 | rel->r_addend = wrel[-1].r_addend; |
d3e454b9 AM |
7509 | |
7510 | /* Continue on as if we had a got reloc, to output | |
7511 | dynamic reloc. */ | |
7512 | r_type = R_PPC_GOT16_LO; | |
7513 | } | |
7514 | else | |
2c4d9cbe | 7515 | _bfd_error_handler |
695344c0 | 7516 | /* xgettext:c-format */ |
2dcf00ce AM |
7517 | (_("%pB(%pA+%#" PRIx64 "): error: " |
7518 | "%s with unexpected instruction %#x"), | |
7519 | input_bfd, input_section, (uint64_t) rel->r_offset, | |
d3e454b9 AM |
7520 | "R_PPC_ADDR16_HA", insn); |
7521 | } | |
e7776f52 AM |
7522 | else if (r_type == R_PPC_ADDR16_LO |
7523 | && offset_in_range (input_section, | |
7524 | rel->r_offset - d_offset, 4)) | |
d3e454b9 | 7525 | { |
95f0d0d2 | 7526 | insn = bfd_get_32 (input_bfd, |
d3e454b9 | 7527 | contents + rel->r_offset - d_offset); |
2365f8d7 AM |
7528 | if ((insn & (0x3fu << 26)) == 14u << 26 /* addi */ |
7529 | || (insn & (0x3fu << 26)) == 32u << 26 /* lwz */ | |
7530 | || (insn & (0x3fu << 26)) == 34u << 26 /* lbz */ | |
7531 | || (insn & (0x3fu << 26)) == 36u << 26 /* stw */ | |
7532 | || (insn & (0x3fu << 26)) == 38u << 26 /* stb */ | |
7533 | || (insn & (0x3fu << 26)) == 40u << 26 /* lhz */ | |
7534 | || (insn & (0x3fu << 26)) == 42u << 26 /* lha */ | |
7535 | || (insn & (0x3fu << 26)) == 44u << 26 /* sth */ | |
7536 | || (insn & (0x3fu << 26)) == 46u << 26 /* lmw */ | |
7537 | || (insn & (0x3fu << 26)) == 47u << 26 /* stmw */ | |
7538 | || (insn & (0x3fu << 26)) == 48u << 26 /* lfs */ | |
7539 | || (insn & (0x3fu << 26)) == 50u << 26 /* lfd */ | |
7540 | || (insn & (0x3fu << 26)) == 52u << 26 /* stfs */ | |
7541 | || (insn & (0x3fu << 26)) == 54u << 26 /* stfd */ | |
7542 | || ((insn & (0x3fu << 26)) == 58u << 26 /* lwa,ld,lmd */ | |
d3e454b9 | 7543 | && (insn & 3) != 1) |
2365f8d7 | 7544 | || ((insn & (0x3fu << 26)) == 62u << 26 /* std, stmd */ |
d3e454b9 AM |
7545 | && ((insn & 3) == 0 || (insn & 3) == 3))) |
7546 | { | |
7547 | /* Arrange to apply the reloc addend, if any. */ | |
7548 | relocation = 0; | |
0a1b45a2 | 7549 | unresolved_reloc = false; |
d3e454b9 AM |
7550 | rel->r_info = ELF32_R_INFO (0, r_type); |
7551 | } | |
7552 | else | |
2c4d9cbe | 7553 | _bfd_error_handler |
695344c0 | 7554 | /* xgettext:c-format */ |
2dcf00ce AM |
7555 | (_("%pB(%pA+%#" PRIx64 "): error: " |
7556 | "%s with unexpected instruction %#x"), | |
7557 | input_bfd, input_section, (uint64_t) rel->r_offset, | |
d3e454b9 AM |
7558 | "R_PPC_ADDR16_LO", insn); |
7559 | } | |
7560 | } | |
7561 | ||
e054468f | 7562 | ifunc = NULL; |
90c14f0c | 7563 | if (htab->elf.target_os != is_vxworks) |
e054468f | 7564 | { |
de972ffa AM |
7565 | struct plt_entry *ent; |
7566 | ||
e054468f AM |
7567 | if (h != NULL) |
7568 | { | |
7569 | if (h->type == STT_GNU_IFUNC) | |
7570 | ifunc = &h->plt.plist; | |
7571 | } | |
de972ffa AM |
7572 | else if (local_got_offsets != NULL |
7573 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
e054468f | 7574 | { |
de972ffa | 7575 | struct plt_entry **local_plt; |
e054468f | 7576 | |
de972ffa AM |
7577 | local_plt = (struct plt_entry **) (local_got_offsets |
7578 | + symtab_hdr->sh_info); | |
7579 | ifunc = local_plt + r_symndx; | |
e054468f | 7580 | } |
e054468f | 7581 | |
de972ffa AM |
7582 | ent = NULL; |
7583 | if (ifunc != NULL | |
0e1862bb | 7584 | && (!bfd_link_pic (info) |
08be3224 AM |
7585 | || is_branch_reloc (r_type) |
7586 | || r_type == R_PPC_PLT16_LO | |
7587 | || r_type == R_PPC_PLT16_HI | |
7588 | || r_type == R_PPC_PLT16_HA)) | |
de972ffa AM |
7589 | { |
7590 | addend = 0; | |
08be3224 AM |
7591 | if (bfd_link_pic (info) |
7592 | && (r_type == R_PPC_PLTREL24 | |
7593 | || r_type == R_PPC_PLT16_LO | |
7594 | || r_type == R_PPC_PLT16_HI | |
7595 | || r_type == R_PPC_PLT16_HA)) | |
de972ffa AM |
7596 | addend = rel->r_addend; |
7597 | ent = find_plt_ent (ifunc, got2, addend); | |
7598 | } | |
7599 | if (ent != NULL) | |
7600 | { | |
888a7fc3 AM |
7601 | if (bfd_link_pic (info) |
7602 | && ent->sec != got2 | |
7603 | && htab->plt_type != PLT_NEW | |
7604 | && (!htab->elf.dynamic_sections_created | |
7605 | || h == NULL | |
7606 | || h->dynindx == -1)) | |
7607 | { | |
7608 | /* Uh oh, we are going to create a pic glink stub | |
7609 | for an ifunc (here for h == NULL and later in | |
7610 | finish_dynamic_symbol for h != NULL), and | |
7611 | apparently are using code compiled with | |
7612 | -mbss-plt. The difficulty is that -mbss-plt code | |
7613 | gives no indication via a magic PLTREL24 addend | |
7614 | whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or | |
7615 | is pointing into a .got2 section (and how far | |
7616 | into .got2). */ | |
7617 | info->callbacks->einfo | |
695344c0 | 7618 | /* xgettext:c-format */ |
174d0a74 | 7619 | (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"), |
888a7fc3 AM |
7620 | input_bfd, input_section, rel->r_offset, sym_name); |
7621 | } | |
e054468f | 7622 | |
0a1b45a2 | 7623 | unresolved_reloc = false; |
e054468f AM |
7624 | if (htab->plt_type == PLT_NEW |
7625 | || !htab->elf.dynamic_sections_created | |
c7e17e05 AM |
7626 | || h == NULL |
7627 | || h->dynindx == -1) | |
e054468f AM |
7628 | relocation = (htab->glink->output_section->vma |
7629 | + htab->glink->output_offset | |
7630 | + (ent->glink_offset & ~1)); | |
7631 | else | |
ce558b89 AM |
7632 | relocation = (htab->elf.splt->output_section->vma |
7633 | + htab->elf.splt->output_offset | |
e054468f AM |
7634 | + ent->plt.offset); |
7635 | } | |
7636 | } | |
7637 | ||
7619e7c7 | 7638 | addend = rel->r_addend; |
23cedd1d | 7639 | save_unresolved_reloc = unresolved_reloc; |
7619e7c7 | 7640 | howto = NULL; |
55fd94b0 AM |
7641 | if (r_type < R_PPC_max) |
7642 | howto = ppc_elf_howto_table[r_type]; | |
9a23f96e | 7643 | |
9a23f96e | 7644 | tls_type = 0; |
7619e7c7 | 7645 | switch (r_type) |
252b5132 RH |
7646 | { |
7647 | default: | |
e7776f52 AM |
7648 | de_fault: |
7649 | if (howto) | |
7650 | /* xgettext:c-format */ | |
7651 | _bfd_error_handler (_("%pB: %s unsupported"), | |
7652 | input_bfd, howto->name); | |
7653 | else | |
7654 | /* xgettext:c-format */ | |
7655 | _bfd_error_handler (_("%pB: reloc %#x unsupported"), | |
7656 | input_bfd, r_type); | |
252b5132 RH |
7657 | |
7658 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 7659 | ret = false; |
c316a17c | 7660 | goto copy_reloc; |
252b5132 | 7661 | |
7619e7c7 AM |
7662 | case R_PPC_NONE: |
7663 | case R_PPC_TLS: | |
727fc41e AM |
7664 | case R_PPC_TLSGD: |
7665 | case R_PPC_TLSLD: | |
7619e7c7 AM |
7666 | case R_PPC_EMB_MRKREF: |
7667 | case R_PPC_GNU_VTINHERIT: | |
7668 | case R_PPC_GNU_VTENTRY: | |
c316a17c | 7669 | goto copy_reloc; |
7595d193 | 7670 | |
7619e7c7 AM |
7671 | /* GOT16 relocations. Like an ADDR16 using the symbol's |
7672 | address in the GOT as relocation value instead of the | |
7673 | symbol's value itself. Also, create a GOT entry for the | |
7674 | symbol and put the symbol value there. */ | |
7675 | case R_PPC_GOT_TLSGD16: | |
7676 | case R_PPC_GOT_TLSGD16_LO: | |
7677 | case R_PPC_GOT_TLSGD16_HI: | |
7678 | case R_PPC_GOT_TLSGD16_HA: | |
7679 | tls_type = TLS_TLS | TLS_GD; | |
7680 | goto dogot; | |
7681 | ||
7682 | case R_PPC_GOT_TLSLD16: | |
7683 | case R_PPC_GOT_TLSLD16_LO: | |
7684 | case R_PPC_GOT_TLSLD16_HI: | |
7685 | case R_PPC_GOT_TLSLD16_HA: | |
7686 | tls_type = TLS_TLS | TLS_LD; | |
7687 | goto dogot; | |
7688 | ||
7689 | case R_PPC_GOT_TPREL16: | |
7690 | case R_PPC_GOT_TPREL16_LO: | |
7691 | case R_PPC_GOT_TPREL16_HI: | |
7692 | case R_PPC_GOT_TPREL16_HA: | |
7693 | tls_type = TLS_TLS | TLS_TPREL; | |
7694 | goto dogot; | |
7695 | ||
7696 | case R_PPC_GOT_DTPREL16: | |
7697 | case R_PPC_GOT_DTPREL16_LO: | |
7698 | case R_PPC_GOT_DTPREL16_HI: | |
7699 | case R_PPC_GOT_DTPREL16_HA: | |
7700 | tls_type = TLS_TLS | TLS_DTPREL; | |
7701 | goto dogot; | |
7702 | ||
7703 | case R_PPC_GOT16: | |
7704 | case R_PPC_GOT16_LO: | |
7705 | case R_PPC_GOT16_HI: | |
7706 | case R_PPC_GOT16_HA: | |
727fc41e | 7707 | tls_mask = 0; |
7619e7c7 AM |
7708 | dogot: |
7709 | { | |
7710 | /* Relocation is to the entry for this symbol in the global | |
7711 | offset table. */ | |
7712 | bfd_vma off; | |
7713 | bfd_vma *offp; | |
7714 | unsigned long indx; | |
7715 | ||
ce558b89 | 7716 | if (htab->elf.sgot == NULL) |
7619e7c7 AM |
7717 | abort (); |
7718 | ||
7719 | indx = 0; | |
7720 | if (tls_type == (TLS_TLS | TLS_LD) | |
f749f26e | 7721 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
7619e7c7 AM |
7722 | offp = &htab->tlsld_got.offset; |
7723 | else if (h != NULL) | |
7724 | { | |
f0158f44 AM |
7725 | if (!htab->elf.dynamic_sections_created |
7726 | || h->dynindx == -1 | |
7727 | || SYMBOL_REFERENCES_LOCAL (info, h) | |
21d68fcd | 7728 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
7619e7c7 AM |
7729 | /* This is actually a static link, or it is a |
7730 | -Bsymbolic link and the symbol is defined | |
7731 | locally, or the symbol was forced to be local | |
7732 | because of a version file. */ | |
7733 | ; | |
7734 | else | |
7735 | { | |
7736 | indx = h->dynindx; | |
0a1b45a2 | 7737 | unresolved_reloc = false; |
7619e7c7 AM |
7738 | } |
7739 | offp = &h->got.offset; | |
7740 | } | |
7741 | else | |
7742 | { | |
7743 | if (local_got_offsets == NULL) | |
7744 | abort (); | |
7745 | offp = &local_got_offsets[r_symndx]; | |
7746 | } | |
7747 | ||
7748 | /* The offset must always be a multiple of 4. We use the | |
7749 | least significant bit to record whether we have already | |
7750 | processed this entry. */ | |
7751 | off = *offp; | |
7752 | if ((off & 1) != 0) | |
7753 | off &= ~1; | |
7754 | else | |
7755 | { | |
37da22e5 AM |
7756 | unsigned int tls_m = ((tls_mask & TLS_TLS) != 0 |
7757 | ? tls_mask & (TLS_LD | TLS_GD | TLS_DTPREL | |
b00a0a86 | 7758 | | TLS_TPREL | TLS_GDIE) |
37da22e5 | 7759 | : 0); |
70bccea4 AM |
7760 | |
7761 | if (offp == &htab->tlsld_got.offset) | |
7762 | tls_m = TLS_LD; | |
f749f26e AM |
7763 | else if ((tls_m & TLS_LD) != 0 |
7764 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
70bccea4 AM |
7765 | tls_m &= ~TLS_LD; |
7766 | ||
7767 | /* We might have multiple got entries for this sym. | |
7768 | Initialize them all. */ | |
7769 | do | |
7619e7c7 | 7770 | { |
70bccea4 AM |
7771 | int tls_ty = 0; |
7772 | ||
7773 | if ((tls_m & TLS_LD) != 0) | |
7619e7c7 | 7774 | { |
70bccea4 AM |
7775 | tls_ty = TLS_TLS | TLS_LD; |
7776 | tls_m &= ~TLS_LD; | |
7777 | } | |
7778 | else if ((tls_m & TLS_GD) != 0) | |
7779 | { | |
7780 | tls_ty = TLS_TLS | TLS_GD; | |
7781 | tls_m &= ~TLS_GD; | |
7782 | } | |
7783 | else if ((tls_m & TLS_DTPREL) != 0) | |
7784 | { | |
7785 | tls_ty = TLS_TLS | TLS_DTPREL; | |
7786 | tls_m &= ~TLS_DTPREL; | |
7787 | } | |
b00a0a86 | 7788 | else if ((tls_m & (TLS_TPREL | TLS_GDIE)) != 0) |
70bccea4 AM |
7789 | { |
7790 | tls_ty = TLS_TLS | TLS_TPREL; | |
7791 | tls_m = 0; | |
7619e7c7 | 7792 | } |
7619e7c7 | 7793 | |
70bccea4 | 7794 | /* Generate relocs for the dynamic linker. */ |
f0158f44 AM |
7795 | if (indx != 0 |
7796 | || (bfd_link_pic (info) | |
7797 | && (h == NULL | |
f749f26e AM |
7798 | || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
7799 | && !(tls_ty != 0 | |
f15d0b54 | 7800 | && bfd_link_executable (info) |
7a9361c0 AM |
7801 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
7802 | && (h != NULL | |
7803 | ? !bfd_is_abs_symbol (&h->root) | |
7804 | : sym->st_shndx != SHN_ABS))) | |
7619e7c7 | 7805 | { |
ce558b89 | 7806 | asection *rsec = htab->elf.srelgot; |
91d6fa6a | 7807 | bfd_byte * loc; |
91e21fb7 | 7808 | |
0bed072f | 7809 | if (ifunc != NULL) |
82e66161 AM |
7810 | { |
7811 | rsec = htab->elf.irelplt; | |
7812 | if (indx == 0) | |
7813 | htab->local_ifunc_resolver = 1; | |
7814 | else if (is_static_defined (h)) | |
7815 | htab->maybe_local_ifunc_resolver = 1; | |
7816 | } | |
ce558b89 AM |
7817 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
7818 | + htab->elf.sgot->output_offset | |
70bccea4 | 7819 | + off); |
e515b051 | 7820 | outrel.r_addend = 0; |
70bccea4 AM |
7821 | if (tls_ty & (TLS_LD | TLS_GD)) |
7822 | { | |
7823 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); | |
70bccea4 AM |
7824 | if (tls_ty == (TLS_TLS | TLS_GD)) |
7825 | { | |
25f23106 AM |
7826 | loc = rsec->contents; |
7827 | loc += (rsec->reloc_count++ | |
70bccea4 AM |
7828 | * sizeof (Elf32_External_Rela)); |
7829 | bfd_elf32_swap_reloca_out (output_bfd, | |
7830 | &outrel, loc); | |
e515b051 | 7831 | outrel.r_offset += 4; |
70bccea4 AM |
7832 | outrel.r_info |
7833 | = ELF32_R_INFO (indx, R_PPC_DTPREL32); | |
70bccea4 AM |
7834 | } |
7835 | } | |
7836 | else if (tls_ty == (TLS_TLS | TLS_DTPREL)) | |
7837 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); | |
7838 | else if (tls_ty == (TLS_TLS | TLS_TPREL)) | |
7839 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); | |
25f23106 | 7840 | else if (indx != 0) |
70bccea4 | 7841 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); |
25f23106 AM |
7842 | else if (ifunc != NULL) |
7843 | outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); | |
7844 | else | |
7845 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); | |
d6e14abc | 7846 | if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) |
e515b051 AM |
7847 | { |
7848 | outrel.r_addend += relocation; | |
7849 | if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) | |
989f9879 AM |
7850 | { |
7851 | if (htab->elf.tls_sec == NULL) | |
7852 | outrel.r_addend = 0; | |
7853 | else | |
7854 | outrel.r_addend -= htab->elf.tls_sec->vma; | |
7855 | } | |
e515b051 | 7856 | } |
25f23106 AM |
7857 | loc = rsec->contents; |
7858 | loc += (rsec->reloc_count++ | |
70bccea4 AM |
7859 | * sizeof (Elf32_External_Rela)); |
7860 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
7619e7c7 AM |
7861 | } |
7862 | ||
70bccea4 AM |
7863 | /* Init the .got section contents if we're not |
7864 | emitting a reloc. */ | |
7865 | else | |
7619e7c7 | 7866 | { |
70bccea4 AM |
7867 | bfd_vma value = relocation; |
7868 | ||
f0158f44 | 7869 | if (tls_ty != 0) |
70bccea4 | 7870 | { |
989f9879 AM |
7871 | if (htab->elf.tls_sec == NULL) |
7872 | value = 0; | |
7873 | else | |
7874 | { | |
f0158f44 AM |
7875 | if (tls_ty & TLS_LD) |
7876 | value = 0; | |
7877 | else | |
7878 | value -= htab->elf.tls_sec->vma + DTP_OFFSET; | |
676ee2b5 | 7879 | if (tls_ty & TLS_TPREL) |
989f9879 AM |
7880 | value += DTP_OFFSET - TP_OFFSET; |
7881 | } | |
70bccea4 | 7882 | |
f0158f44 | 7883 | if (tls_ty & (TLS_LD | TLS_GD)) |
7b609f53 | 7884 | { |
95f0d0d2 | 7885 | bfd_put_32 (input_bfd, value, |
ce558b89 | 7886 | htab->elf.sgot->contents + off + 4); |
676ee2b5 | 7887 | value = 1; |
7b609f53 | 7888 | } |
70bccea4 | 7889 | } |
95f0d0d2 | 7890 | bfd_put_32 (input_bfd, value, |
ce558b89 | 7891 | htab->elf.sgot->contents + off); |
7619e7c7 | 7892 | } |
70bccea4 AM |
7893 | |
7894 | off += 4; | |
7895 | if (tls_ty & (TLS_LD | TLS_GD)) | |
7896 | off += 4; | |
7619e7c7 | 7897 | } |
70bccea4 AM |
7898 | while (tls_m != 0); |
7899 | ||
7900 | off = *offp; | |
7901 | *offp = off | 1; | |
7619e7c7 AM |
7902 | } |
7903 | ||
7904 | if (off >= (bfd_vma) -2) | |
7905 | abort (); | |
7906 | ||
70bccea4 AM |
7907 | if ((tls_type & TLS_TLS) != 0) |
7908 | { | |
7909 | if (tls_type != (TLS_TLS | TLS_LD)) | |
7910 | { | |
7911 | if ((tls_mask & TLS_LD) != 0 | |
f749f26e | 7912 | && !SYMBOL_REFERENCES_LOCAL (info, h)) |
70bccea4 AM |
7913 | off += 8; |
7914 | if (tls_type != (TLS_TLS | TLS_GD)) | |
7915 | { | |
7916 | if ((tls_mask & TLS_GD) != 0) | |
7917 | off += 8; | |
7918 | if (tls_type != (TLS_TLS | TLS_DTPREL)) | |
7919 | { | |
7920 | if ((tls_mask & TLS_DTPREL) != 0) | |
7921 | off += 4; | |
7922 | } | |
7923 | } | |
7924 | } | |
7925 | } | |
7926 | ||
d3e454b9 AM |
7927 | /* If here for a picfixup, we're done. */ |
7928 | if (r_type != ELF32_R_TYPE (rel->r_info)) | |
c316a17c | 7929 | goto copy_reloc; |
d3e454b9 | 7930 | |
ce558b89 AM |
7931 | relocation = (htab->elf.sgot->output_section->vma |
7932 | + htab->elf.sgot->output_offset | |
e87d4038 AM |
7933 | + off |
7934 | - SYM_VAL (htab->elf.hgot)); | |
7619e7c7 AM |
7935 | |
7936 | /* Addends on got relocations don't make much sense. | |
7937 | x+off@got is actually x@got+off, and since the got is | |
7938 | generated by a hash table traversal, the value in the | |
7939 | got at entry m+n bears little relation to the entry m. */ | |
7940 | if (addend != 0) | |
25f53a85 | 7941 | info->callbacks->einfo |
695344c0 | 7942 | /* xgettext:c-format */ |
174d0a74 | 7943 | (_("%H: non-zero addend on %s reloc against `%s'\n"), |
25f53a85 | 7944 | input_bfd, input_section, rel->r_offset, |
7b609f53 | 7945 | howto->name, |
7619e7c7 AM |
7946 | sym_name); |
7947 | } | |
86c95733 | 7948 | break; |
7619e7c7 | 7949 | |
86c95733 | 7950 | /* Relocations that need no special processing. */ |
7619e7c7 | 7951 | case R_PPC_LOCAL24PC: |
252b5132 RH |
7952 | /* It makes no sense to point a local relocation |
7953 | at a symbol not in this object. */ | |
7b609f53 | 7954 | if (unresolved_reloc) |
252b5132 | 7955 | { |
1a72702b AM |
7956 | (*info->callbacks->undefined_symbol) (info, |
7957 | h->root.root.string, | |
7958 | input_bfd, | |
7959 | input_section, | |
7960 | rel->r_offset, | |
0a1b45a2 | 7961 | true); |
c316a17c | 7962 | goto copy_reloc; |
252b5132 | 7963 | } |
888a7fc3 AM |
7964 | if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info)) |
7965 | { | |
7966 | /* @local on an ifunc does not really make sense since | |
7967 | the ifunc resolver can take you anywhere. More | |
7968 | seriously, calls to ifuncs must go through a plt call | |
7969 | stub, and for pic the plt call stubs uses r30 to | |
7970 | access the PLT. The problem is that a call that is | |
7971 | local won't have the +32k reloc addend trick marking | |
7972 | -fPIC code, so the linker won't know whether r30 is | |
7973 | _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */ | |
695344c0 | 7974 | /* xgettext:c-format */ |
174d0a74 | 7975 | info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"), |
888a7fc3 AM |
7976 | input_bfd, input_section, rel->r_offset, |
7977 | h->root.root.string); | |
7978 | } | |
252b5132 RH |
7979 | break; |
7980 | ||
7619e7c7 AM |
7981 | case R_PPC_DTPREL16: |
7982 | case R_PPC_DTPREL16_LO: | |
7983 | case R_PPC_DTPREL16_HI: | |
7984 | case R_PPC_DTPREL16_HA: | |
989f9879 AM |
7985 | if (htab->elf.tls_sec != NULL) |
7986 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; | |
7619e7c7 AM |
7987 | break; |
7988 | ||
70bccea4 AM |
7989 | /* Relocations that may need to be propagated if this is a shared |
7990 | object. */ | |
7619e7c7 AM |
7991 | case R_PPC_TPREL16: |
7992 | case R_PPC_TPREL16_LO: | |
7993 | case R_PPC_TPREL16_HI: | |
7994 | case R_PPC_TPREL16_HA: | |
766bc656 AM |
7995 | if (h != NULL |
7996 | && h->root.type == bfd_link_hash_undefweak | |
e7776f52 AM |
7997 | && h->dynindx == -1 |
7998 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) | |
766bc656 AM |
7999 | { |
8000 | /* Make this relocation against an undefined weak symbol | |
8001 | resolve to zero. This is really just a tweak, since | |
8002 | code using weak externs ought to check that they are | |
8003 | defined before using them. */ | |
8004 | bfd_byte *p = contents + rel->r_offset - d_offset; | |
95f0d0d2 | 8005 | unsigned int insn = bfd_get_32 (input_bfd, p); |
766bc656 AM |
8006 | insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); |
8007 | if (insn != 0) | |
95f0d0d2 | 8008 | bfd_put_32 (input_bfd, insn, p); |
766bc656 AM |
8009 | break; |
8010 | } | |
989f9879 AM |
8011 | if (htab->elf.tls_sec != NULL) |
8012 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; | |
7619e7c7 | 8013 | /* The TPREL16 relocs shouldn't really be used in shared |
7c8bbca5 AM |
8014 | libs or with non-local symbols as that will result in |
8015 | DT_TEXTREL being set, but support them anyway. */ | |
7619e7c7 AM |
8016 | goto dodyn; |
8017 | ||
8018 | case R_PPC_TPREL32: | |
989f9879 AM |
8019 | if (htab->elf.tls_sec != NULL) |
8020 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; | |
7619e7c7 AM |
8021 | goto dodyn; |
8022 | ||
8023 | case R_PPC_DTPREL32: | |
989f9879 AM |
8024 | if (htab->elf.tls_sec != NULL) |
8025 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; | |
7619e7c7 AM |
8026 | goto dodyn; |
8027 | ||
e515b051 AM |
8028 | case R_PPC_DTPMOD32: |
8029 | relocation = 1; | |
8030 | addend = 0; | |
8031 | goto dodyn; | |
8032 | ||
d7128ce4 AM |
8033 | case R_PPC_REL16: |
8034 | case R_PPC_REL16_LO: | |
8035 | case R_PPC_REL16_HI: | |
8036 | case R_PPC_REL16_HA: | |
a680de9a | 8037 | case R_PPC_REL16DX_HA: |
d7128ce4 AM |
8038 | break; |
8039 | ||
7619e7c7 | 8040 | case R_PPC_REL32: |
625af618 AM |
8041 | if (h == NULL || h == htab->elf.hgot) |
8042 | break; | |
8043 | /* fall through */ | |
8044 | ||
8045 | case R_PPC_ADDR32: | |
8046 | case R_PPC_ADDR16: | |
8047 | case R_PPC_ADDR16_LO: | |
8048 | case R_PPC_ADDR16_HI: | |
8049 | case R_PPC_ADDR16_HA: | |
8050 | case R_PPC_UADDR32: | |
8051 | case R_PPC_UADDR16: | |
8052 | goto dodyn; | |
8053 | ||
b9c361e0 JL |
8054 | case R_PPC_VLE_REL8: |
8055 | case R_PPC_VLE_REL15: | |
8056 | case R_PPC_VLE_REL24: | |
625af618 | 8057 | case R_PPC_REL24: |
7619e7c7 AM |
8058 | case R_PPC_REL14: |
8059 | case R_PPC_REL14_BRTAKEN: | |
8060 | case R_PPC_REL14_BRNTAKEN: | |
252b5132 RH |
8061 | /* If these relocations are not to a named symbol, they can be |
8062 | handled right here, no need to bother the dynamic linker. */ | |
89200bf8 | 8063 | if (SYMBOL_CALLS_LOCAL (info, h) |
3b36f7e6 | 8064 | || h == htab->elf.hgot) |
252b5132 | 8065 | break; |
70bccea4 | 8066 | /* fall through */ |
252b5132 | 8067 | |
7619e7c7 | 8068 | case R_PPC_ADDR24: |
7619e7c7 AM |
8069 | case R_PPC_ADDR14: |
8070 | case R_PPC_ADDR14_BRTAKEN: | |
8071 | case R_PPC_ADDR14_BRNTAKEN: | |
0e1862bb | 8072 | if (h != NULL && !bfd_link_pic (info)) |
625af618 AM |
8073 | break; |
8074 | /* fall through */ | |
8075 | ||
7619e7c7 | 8076 | dodyn: |
3348747a NS |
8077 | if ((input_section->flags & SEC_ALLOC) == 0 |
8078 | || is_vxworks_tls) | |
c87b5a93 | 8079 | break; |
c87b5a93 | 8080 | |
287c7eaf AM |
8081 | if (bfd_link_pic (info) |
8082 | ? ((h == NULL | |
190eb1dd | 8083 | || h->dyn_relocs != NULL) |
287c7eaf AM |
8084 | && ((h != NULL && pc_dynrelocs (h)) |
8085 | || must_be_dyn_reloc (info, r_type))) | |
8086 | : (h != NULL | |
190eb1dd | 8087 | && h->dyn_relocs != NULL)) |
252b5132 | 8088 | { |
0bb2d96a | 8089 | int skip; |
f95f8542 AM |
8090 | bfd_byte *loc; |
8091 | asection *sreloc; | |
82e66161 AM |
8092 | long indx = 0; |
8093 | ||
252b5132 | 8094 | #ifdef DEBUG |
55fd94b0 AM |
8095 | fprintf (stderr, "ppc_elf_relocate_section needs to " |
8096 | "create relocation for %s\n", | |
70bccea4 AM |
8097 | (h && h->root.root.string |
8098 | ? h->root.root.string : "<unknown>")); | |
252b5132 RH |
8099 | #endif |
8100 | ||
8101 | /* When generating a shared object, these relocations | |
70bccea4 AM |
8102 | are copied into the output file to be resolved at run |
8103 | time. */ | |
0bb2d96a | 8104 | skip = 0; |
5b914448 AM |
8105 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, |
8106 | input_section, | |
8107 | rel->r_offset); | |
0bb2d96a JJ |
8108 | if (outrel.r_offset == (bfd_vma) -1 |
8109 | || outrel.r_offset == (bfd_vma) -2) | |
8110 | skip = (int) outrel.r_offset; | |
252b5132 RH |
8111 | outrel.r_offset += (input_section->output_section->vma |
8112 | + input_section->output_offset); | |
8113 | ||
63f6e94f AM |
8114 | /* Optimize unaligned reloc use. */ |
8115 | if ((r_type == R_PPC_ADDR32 && (outrel.r_offset & 3) != 0) | |
8116 | || (r_type == R_PPC_UADDR32 && (outrel.r_offset & 3) == 0)) | |
8117 | r_type ^= R_PPC_ADDR32 ^ R_PPC_UADDR32; | |
8118 | if ((r_type == R_PPC_ADDR16 && (outrel.r_offset & 1) != 0) | |
8119 | || (r_type == R_PPC_UADDR16 && (outrel.r_offset & 1) == 0)) | |
8120 | r_type ^= R_PPC_ADDR16 ^ R_PPC_UADDR16; | |
8121 | ||
252b5132 RH |
8122 | if (skip) |
8123 | memset (&outrel, 0, sizeof outrel); | |
21d68fcd | 8124 | else if (!SYMBOL_REFERENCES_LOCAL (info, h)) |
252b5132 | 8125 | { |
82e66161 AM |
8126 | indx = h->dynindx; |
8127 | BFD_ASSERT (indx != -1); | |
0a1b45a2 | 8128 | unresolved_reloc = false; |
82e66161 | 8129 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
252b5132 RH |
8130 | outrel.r_addend = rel->r_addend; |
8131 | } | |
8132 | else | |
8133 | { | |
47388f4c AM |
8134 | outrel.r_addend = relocation + rel->r_addend; |
8135 | ||
25f23106 | 8136 | if (r_type != R_PPC_ADDR32) |
252b5132 | 8137 | { |
25f23106 AM |
8138 | if (ifunc != NULL) |
8139 | { | |
8140 | /* If we get here when building a static | |
8141 | executable, then the libc startup function | |
8142 | responsible for applying indirect function | |
8143 | relocations is going to complain about | |
8144 | the reloc type. | |
8145 | If we get here when building a dynamic | |
8146 | executable, it will be because we have | |
8147 | a text relocation. The dynamic loader | |
8148 | will set the text segment writable and | |
8149 | non-executable to apply text relocations. | |
8150 | So we'll segfault when trying to run the | |
8151 | indirection function to resolve the reloc. */ | |
25f53a85 | 8152 | info->callbacks->einfo |
695344c0 | 8153 | /* xgettext:c-format */ |
174d0a74 | 8154 | (_("%H: relocation %s for indirect " |
25f53a85 AM |
8155 | "function %s unsupported\n"), |
8156 | input_bfd, input_section, rel->r_offset, | |
25f23106 AM |
8157 | howto->name, |
8158 | sym_name); | |
0a1b45a2 | 8159 | ret = false; |
25f23106 | 8160 | } |
cf35638d | 8161 | else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) |
89200bf8 | 8162 | ; |
252b5132 RH |
8163 | else if (sec == NULL || sec->owner == NULL) |
8164 | { | |
8165 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 8166 | ret = false; |
252b5132 RH |
8167 | } |
8168 | else | |
8169 | { | |
8170 | asection *osec; | |
8171 | ||
47388f4c AM |
8172 | /* We are turning this relocation into one |
8173 | against a section symbol. It would be | |
8174 | proper to subtract the symbol's value, | |
8175 | osec->vma, from the emitted reloc addend, | |
25f23106 AM |
8176 | but ld.so expects buggy relocs. |
8177 | FIXME: Why not always use a zero index? */ | |
252b5132 | 8178 | osec = sec->output_section; |
f26a3287 AM |
8179 | if ((osec->flags & SEC_THREAD_LOCAL) != 0) |
8180 | { | |
8181 | osec = htab->elf.tls_sec; | |
8182 | indx = 0; | |
8183 | } | |
8184 | else | |
74541ad4 | 8185 | { |
74541ad4 | 8186 | indx = elf_section_data (osec)->dynindx; |
f26a3287 AM |
8187 | if (indx == 0) |
8188 | { | |
8189 | osec = htab->elf.text_index_section; | |
8190 | indx = elf_section_data (osec)->dynindx; | |
8191 | } | |
8192 | BFD_ASSERT (indx != 0); | |
74541ad4 | 8193 | } |
f26a3287 AM |
8194 | |
8195 | /* ld.so doesn't expect buggy TLS relocs. | |
8196 | Don't leave the symbol value in the | |
8197 | addend for them. */ | |
8198 | if (IS_PPC_TLS_RELOC (r_type)) | |
8199 | outrel.r_addend -= osec->vma; | |
252b5132 RH |
8200 | } |
8201 | ||
8202 | outrel.r_info = ELF32_R_INFO (indx, r_type); | |
252b5132 | 8203 | } |
25f23106 AM |
8204 | else if (ifunc != NULL) |
8205 | outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); | |
8206 | else | |
8207 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); | |
252b5132 RH |
8208 | } |
8209 | ||
82e66161 AM |
8210 | sreloc = elf_section_data (input_section)->sreloc; |
8211 | if (ifunc) | |
8212 | { | |
8213 | sreloc = htab->elf.irelplt; | |
8214 | if (indx == 0) | |
8215 | htab->local_ifunc_resolver = 1; | |
8216 | else if (is_static_defined (h)) | |
8217 | htab->maybe_local_ifunc_resolver = 1; | |
8218 | } | |
8219 | if (sreloc == NULL) | |
0a1b45a2 | 8220 | return false; |
82e66161 | 8221 | |
947216bf AM |
8222 | loc = sreloc->contents; |
8223 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
8224 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 | 8225 | |
2243deae | 8226 | if (skip == -1) |
c316a17c | 8227 | goto copy_reloc; |
2243deae | 8228 | |
f0158f44 AM |
8229 | /* This reloc will be computed at runtime. Clear the memory |
8230 | so that it contains a predictable value for prelink. */ | |
8231 | if (!skip) | |
2243deae L |
8232 | { |
8233 | relocation = howto->pc_relative ? outrel.r_offset : 0; | |
8234 | addend = 0; | |
8235 | break; | |
8236 | } | |
252b5132 | 8237 | } |
252b5132 RH |
8238 | break; |
8239 | ||
32af9f6e AM |
8240 | case R_PPC_RELAX_PLT: |
8241 | case R_PPC_RELAX_PLTREL24: | |
de972ffa AM |
8242 | if (h != NULL) |
8243 | { | |
32af9f6e AM |
8244 | struct plt_entry *ent; |
8245 | bfd_vma got2_addend = 0; | |
8246 | ||
8247 | if (r_type == R_PPC_RELAX_PLTREL24) | |
8248 | { | |
0e1862bb | 8249 | if (bfd_link_pic (info)) |
32af9f6e AM |
8250 | got2_addend = addend; |
8251 | addend = 0; | |
8252 | } | |
8253 | ent = find_plt_ent (&h->plt.plist, got2, got2_addend); | |
de972ffa AM |
8254 | if (htab->plt_type == PLT_NEW) |
8255 | relocation = (htab->glink->output_section->vma | |
8256 | + htab->glink->output_offset | |
8257 | + ent->glink_offset); | |
8258 | else | |
ce558b89 AM |
8259 | relocation = (htab->elf.splt->output_section->vma |
8260 | + htab->elf.splt->output_offset | |
de972ffa AM |
8261 | + ent->plt.offset); |
8262 | } | |
1a0670f3 | 8263 | /* Fall through. */ |
b4a38de6 | 8264 | |
32af9f6e | 8265 | case R_PPC_RELAX: |
e7776f52 AM |
8266 | if (bfd_link_pic (info) |
8267 | ? offset_in_range (input_section, rel->r_offset - 12, | |
8268 | ARRAY_SIZE (shared_stub_entry) * 4) | |
8269 | : offset_in_range (input_section, rel->r_offset, | |
8270 | ARRAY_SIZE (stub_entry) * 4)) | |
8271 | { | |
8272 | const int *stub; | |
8273 | size_t size; | |
8274 | size_t insn_offset = rel->r_offset; | |
8275 | unsigned int insn; | |
53291d1f | 8276 | |
e7776f52 AM |
8277 | if (bfd_link_pic (info)) |
8278 | { | |
8279 | relocation -= (input_section->output_section->vma | |
8280 | + input_section->output_offset | |
8281 | + rel->r_offset - 4); | |
8282 | stub = shared_stub_entry; | |
8283 | bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12); | |
8284 | bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8); | |
8285 | bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4); | |
8286 | stub += 3; | |
8287 | size = ARRAY_SIZE (shared_stub_entry) - 3; | |
8288 | } | |
8289 | else | |
8290 | { | |
8291 | stub = stub_entry; | |
8292 | size = ARRAY_SIZE (stub_entry); | |
8293 | } | |
53291d1f | 8294 | |
e7776f52 AM |
8295 | relocation += addend; |
8296 | if (bfd_link_relocatable (info)) | |
8297 | relocation = 0; | |
8298 | ||
8299 | /* First insn is HA, second is LO. */ | |
8300 | insn = *stub++; | |
8301 | insn |= ((relocation + 0x8000) >> 16) & 0xffff; | |
8302 | bfd_put_32 (input_bfd, insn, contents + insn_offset); | |
8303 | insn_offset += 4; | |
8304 | ||
8305 | insn = *stub++; | |
8306 | insn |= relocation & 0xffff; | |
8307 | bfd_put_32 (input_bfd, insn, contents + insn_offset); | |
8308 | insn_offset += 4; | |
8309 | size -= 2; | |
8310 | ||
8311 | while (size != 0) | |
8312 | { | |
8313 | insn = *stub++; | |
8314 | --size; | |
8315 | bfd_put_32 (input_bfd, insn, contents + insn_offset); | |
8316 | insn_offset += 4; | |
8317 | } | |
9bc4e62b | 8318 | |
e7776f52 AM |
8319 | /* Rewrite the reloc and convert one of the trailing nop |
8320 | relocs to describe this relocation. */ | |
8321 | BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); | |
8322 | /* The relocs are at the bottom 2 bytes */ | |
8323 | wrel->r_offset = rel->r_offset + d_offset; | |
8324 | wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); | |
8325 | wrel->r_addend = rel->r_addend; | |
8326 | memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel)); | |
8327 | wrel++, rel++; | |
8328 | wrel->r_offset += 4; | |
8329 | wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); | |
8330 | } | |
8331 | else | |
8332 | goto de_fault; | |
8517fae7 | 8333 | continue; |
deaaf2f3 | 8334 | |
70bccea4 | 8335 | /* Indirect .sdata relocation. */ |
7619e7c7 | 8336 | case R_PPC_EMB_SDAI16: |
c9a2f333 | 8337 | BFD_ASSERT (htab->sdata[0].section != NULL); |
bd6c6e2b AM |
8338 | if (!is_static_defined (htab->sdata[0].sym)) |
8339 | { | |
0a1b45a2 | 8340 | unresolved_reloc = true; |
bd6c6e2b AM |
8341 | break; |
8342 | } | |
7619e7c7 | 8343 | relocation |
76750a2f AM |
8344 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], |
8345 | h, relocation, rel); | |
bd6c6e2b | 8346 | addend = 0; |
252b5132 RH |
8347 | break; |
8348 | ||
70bccea4 | 8349 | /* Indirect .sdata2 relocation. */ |
7619e7c7 | 8350 | case R_PPC_EMB_SDA2I16: |
c9a2f333 | 8351 | BFD_ASSERT (htab->sdata[1].section != NULL); |
bd6c6e2b AM |
8352 | if (!is_static_defined (htab->sdata[1].sym)) |
8353 | { | |
0a1b45a2 | 8354 | unresolved_reloc = true; |
bd6c6e2b AM |
8355 | break; |
8356 | } | |
7619e7c7 | 8357 | relocation |
76750a2f AM |
8358 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], |
8359 | h, relocation, rel); | |
bd6c6e2b | 8360 | addend = 0; |
252b5132 RH |
8361 | break; |
8362 | ||
70bccea4 AM |
8363 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
8364 | section, not the actual VMA. This is appropriate when generating | |
8365 | an embedded ELF object, for which the .got section acts like the | |
8366 | AIX .toc section. */ | |
7619e7c7 | 8367 | case R_PPC_TOC16: /* phony GOT16 relocations */ |
3b4f3a11 AM |
8368 | if (sec == NULL || sec->output_section == NULL) |
8369 | { | |
0a1b45a2 | 8370 | unresolved_reloc = true; |
3b4f3a11 AM |
8371 | break; |
8372 | } | |
fd361982 AM |
8373 | BFD_ASSERT (strcmp (bfd_section_name (sec), ".got") == 0 |
8374 | || strcmp (bfd_section_name (sec), ".cgot") == 0); | |
252b5132 | 8375 | |
3b4f3a11 | 8376 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
252b5132 RH |
8377 | break; |
8378 | ||
7619e7c7 | 8379 | case R_PPC_PLTREL24: |
f75e0e33 AM |
8380 | if (h != NULL && ifunc == NULL) |
8381 | { | |
cbf95972 AM |
8382 | struct plt_entry *ent; |
8383 | ||
8384 | ent = find_plt_ent (&h->plt.plist, got2, | |
8385 | bfd_link_pic (info) ? addend : 0); | |
f75e0e33 | 8386 | if (ent == NULL |
ce558b89 | 8387 | || htab->elf.splt == NULL) |
f75e0e33 AM |
8388 | { |
8389 | /* We didn't make a PLT entry for this symbol. This | |
8390 | happens when statically linking PIC code, or when | |
8391 | using -Bsymbolic. */ | |
8392 | } | |
8393 | else | |
8394 | { | |
8395 | /* Relocation is to the entry for this symbol in the | |
8396 | procedure linkage table. */ | |
0a1b45a2 | 8397 | unresolved_reloc = false; |
f75e0e33 AM |
8398 | if (htab->plt_type == PLT_NEW) |
8399 | relocation = (htab->glink->output_section->vma | |
8400 | + htab->glink->output_offset | |
8401 | + ent->glink_offset); | |
8402 | else | |
ce558b89 AM |
8403 | relocation = (htab->elf.splt->output_section->vma |
8404 | + htab->elf.splt->output_offset | |
f75e0e33 AM |
8405 | + ent->plt.offset); |
8406 | } | |
8407 | } | |
252b5132 | 8408 | |
f75e0e33 AM |
8409 | /* R_PPC_PLTREL24 is rather special. If non-zero, the |
8410 | addend specifies the GOT pointer offset within .got2. | |
8411 | Don't apply it to the relocation field. */ | |
8412 | addend = 0; | |
8da6118f | 8413 | break; |
252b5132 | 8414 | |
23cedd1d AM |
8415 | case R_PPC_PLTSEQ: |
8416 | case R_PPC_PLTCALL: | |
08be3224 AM |
8417 | case R_PPC_PLT16_LO: |
8418 | case R_PPC_PLT16_HI: | |
8419 | case R_PPC_PLT16_HA: | |
2d7ad24e | 8420 | plt_list = NULL; |
08be3224 AM |
8421 | if (h != NULL) |
8422 | plt_list = &h->plt.plist; | |
2d7ad24e AM |
8423 | else if (ifunc != NULL) |
8424 | plt_list = ifunc; | |
8425 | else if (local_got_offsets != NULL) | |
8426 | { | |
8427 | struct plt_entry **local_plt; | |
8428 | local_plt = (struct plt_entry **) (local_got_offsets | |
8429 | + symtab_hdr->sh_info); | |
8430 | plt_list = local_plt + r_symndx; | |
8431 | } | |
0a1b45a2 | 8432 | unresolved_reloc = true; |
08be3224 AM |
8433 | if (plt_list != NULL) |
8434 | { | |
8435 | struct plt_entry *ent; | |
8436 | ||
8437 | ent = find_plt_ent (plt_list, got2, | |
8438 | bfd_link_pic (info) ? addend : 0); | |
2d7ad24e | 8439 | if (ent != NULL && ent->plt.offset != (bfd_vma) -1) |
08be3224 | 8440 | { |
2d7ad24e AM |
8441 | asection *plt; |
8442 | ||
0a1b45a2 | 8443 | unresolved_reloc = false; |
2d7ad24e | 8444 | plt = htab->elf.splt; |
30845f11 | 8445 | if (use_local_plt (info, h)) |
2d7ad24e AM |
8446 | { |
8447 | if (ifunc != NULL) | |
8448 | plt = htab->elf.iplt; | |
8449 | else | |
8450 | plt = htab->pltlocal; | |
8451 | } | |
8452 | relocation = (plt->output_section->vma | |
8453 | + plt->output_offset | |
08be3224 AM |
8454 | + ent->plt.offset); |
8455 | if (bfd_link_pic (info)) | |
8456 | { | |
8457 | bfd_vma got = 0; | |
8458 | ||
8459 | if (ent->addend >= 32768) | |
8460 | got = (ent->addend | |
8461 | + ent->sec->output_section->vma | |
8462 | + ent->sec->output_offset); | |
8463 | else | |
8464 | got = SYM_VAL (htab->elf.hgot); | |
8465 | relocation -= got; | |
8466 | } | |
8467 | } | |
8468 | } | |
8469 | addend = 0; | |
8470 | break; | |
8471 | ||
70bccea4 | 8472 | /* Relocate against _SDA_BASE_. */ |
7619e7c7 | 8473 | case R_PPC_SDAREL16: |
252b5132 RH |
8474 | { |
8475 | const char *name; | |
bd6c6e2b | 8476 | struct elf_link_hash_entry *sda = htab->sdata[0].sym; |
252b5132 | 8477 | |
bd6c6e2b AM |
8478 | if (sec == NULL |
8479 | || sec->output_section == NULL | |
8480 | || !is_static_defined (sda)) | |
3b4f3a11 | 8481 | { |
0a1b45a2 | 8482 | unresolved_reloc = true; |
3b4f3a11 AM |
8483 | break; |
8484 | } | |
bd6c6e2b | 8485 | addend -= SYM_VAL (sda); |
3b4f3a11 | 8486 | |
fd361982 | 8487 | name = bfd_section_name (sec->output_section); |
93d1b056 AM |
8488 | if (!(strcmp (name, ".sdata") == 0 |
8489 | || strcmp (name, ".sbss") == 0)) | |
252b5132 | 8490 | { |
cf97bcb0 | 8491 | _bfd_error_handler |
695344c0 | 8492 | /* xgettext:c-format */ |
cf97bcb0 AM |
8493 | (_("%pB: the target (%s) of a %s relocation is " |
8494 | "in the wrong output section (%s)"), | |
d003868e | 8495 | input_bfd, |
55fd94b0 AM |
8496 | sym_name, |
8497 | howto->name, | |
8498 | name); | |
252b5132 | 8499 | } |
252b5132 RH |
8500 | } |
8501 | break; | |
8502 | ||
70bccea4 | 8503 | /* Relocate against _SDA2_BASE_. */ |
7619e7c7 | 8504 | case R_PPC_EMB_SDA2REL: |
252b5132 RH |
8505 | { |
8506 | const char *name; | |
bd6c6e2b | 8507 | struct elf_link_hash_entry *sda = htab->sdata[1].sym; |
252b5132 | 8508 | |
bd6c6e2b AM |
8509 | if (sec == NULL |
8510 | || sec->output_section == NULL | |
8511 | || !is_static_defined (sda)) | |
3b4f3a11 | 8512 | { |
0a1b45a2 | 8513 | unresolved_reloc = true; |
3b4f3a11 AM |
8514 | break; |
8515 | } | |
bd6c6e2b | 8516 | addend -= SYM_VAL (sda); |
3b4f3a11 | 8517 | |
fd361982 | 8518 | name = bfd_section_name (sec->output_section); |
93d1b056 AM |
8519 | if (!(strcmp (name, ".sdata2") == 0 |
8520 | || strcmp (name, ".sbss2") == 0)) | |
252b5132 | 8521 | { |
cf97bcb0 | 8522 | _bfd_error_handler |
695344c0 | 8523 | /* xgettext:c-format */ |
cf97bcb0 AM |
8524 | (_("%pB: the target (%s) of a %s relocation is " |
8525 | "in the wrong output section (%s)"), | |
d003868e | 8526 | input_bfd, |
55fd94b0 AM |
8527 | sym_name, |
8528 | howto->name, | |
8529 | name); | |
252b5132 | 8530 | } |
252b5132 RH |
8531 | } |
8532 | break; | |
8533 | ||
b9c361e0 | 8534 | case R_PPC_VLE_LO16A: |
86c95733 | 8535 | relocation = relocation + addend; |
e7776f52 AM |
8536 | r = ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, |
8537 | contents + rel->r_offset, relocation, | |
8538 | split16a_type, | |
8539 | htab->params->vle_reloc_fixup); | |
8540 | goto report_reloc; | |
b9c361e0 JL |
8541 | |
8542 | case R_PPC_VLE_LO16D: | |
86c95733 | 8543 | relocation = relocation + addend; |
e7776f52 AM |
8544 | r = ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, |
8545 | contents + rel->r_offset, relocation, | |
8546 | split16d_type, | |
8547 | htab->params->vle_reloc_fixup); | |
8548 | goto report_reloc; | |
b9c361e0 JL |
8549 | |
8550 | case R_PPC_VLE_HI16A: | |
86c95733 | 8551 | relocation = (relocation + addend) >> 16; |
e7776f52 AM |
8552 | r = ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, |
8553 | contents + rel->r_offset, relocation, | |
8554 | split16a_type, | |
8555 | htab->params->vle_reloc_fixup); | |
8556 | goto report_reloc; | |
b9c361e0 JL |
8557 | |
8558 | case R_PPC_VLE_HI16D: | |
86c95733 | 8559 | relocation = (relocation + addend) >> 16; |
e7776f52 AM |
8560 | r = ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, |
8561 | contents + rel->r_offset, relocation, | |
8562 | split16d_type, | |
8563 | htab->params->vle_reloc_fixup); | |
8564 | goto report_reloc; | |
b9c361e0 JL |
8565 | |
8566 | case R_PPC_VLE_HA16A: | |
86c95733 | 8567 | relocation = (relocation + addend + 0x8000) >> 16; |
e7776f52 AM |
8568 | r = ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, |
8569 | contents + rel->r_offset, relocation, | |
8570 | split16a_type, | |
8571 | htab->params->vle_reloc_fixup); | |
8572 | goto report_reloc; | |
b9c361e0 JL |
8573 | |
8574 | case R_PPC_VLE_HA16D: | |
86c95733 | 8575 | relocation = (relocation + addend + 0x8000) >> 16; |
e7776f52 AM |
8576 | r = ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset, |
8577 | contents + rel->r_offset, relocation, | |
8578 | split16d_type, | |
8579 | htab->params->vle_reloc_fixup); | |
8580 | goto report_reloc; | |
b9c361e0 | 8581 | |
70bccea4 | 8582 | /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ |
7619e7c7 | 8583 | case R_PPC_EMB_SDA21: |
b9c361e0 | 8584 | case R_PPC_VLE_SDA21: |
7619e7c7 | 8585 | case R_PPC_EMB_RELSDA: |
b9c361e0 | 8586 | case R_PPC_VLE_SDA21_LO: |
e7776f52 AM |
8587 | if (!offset_in_range (input_section, rel->r_offset, 4)) |
8588 | { | |
8589 | r = bfd_reloc_outofrange; | |
8590 | goto report_reloc; | |
8591 | } | |
8592 | else | |
8593 | { | |
8594 | const char *name; | |
8595 | int reg; | |
8596 | unsigned int insn; | |
8597 | struct elf_link_hash_entry *sda = NULL; | |
252b5132 | 8598 | |
e7776f52 AM |
8599 | if (sec == NULL || sec->output_section == NULL) |
8600 | { | |
8601 | unresolved_reloc = true; | |
8602 | break; | |
8603 | } | |
3b4f3a11 | 8604 | |
e7776f52 AM |
8605 | name = bfd_section_name (sec->output_section); |
8606 | if (strcmp (name, ".sdata") == 0 | |
8607 | || strcmp (name, ".sbss") == 0) | |
8608 | { | |
8609 | reg = 13; | |
8610 | sda = htab->sdata[0].sym; | |
8611 | } | |
8612 | else if (strcmp (name, ".sdata2") == 0 | |
8613 | || strcmp (name, ".sbss2") == 0) | |
8614 | { | |
8615 | reg = 2; | |
8616 | sda = htab->sdata[1].sym; | |
8617 | } | |
8618 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 | |
8619 | || strcmp (name, ".PPC.EMB.sbss0") == 0) | |
8620 | { | |
8621 | reg = 0; | |
8622 | } | |
8623 | else | |
8624 | { | |
8625 | _bfd_error_handler | |
8626 | /* xgettext:c-format */ | |
8627 | (_("%pB: the target (%s) of a %s relocation is " | |
8628 | "in the wrong output section (%s)"), | |
8629 | input_bfd, | |
8630 | sym_name, | |
8631 | howto->name, | |
8632 | name); | |
8633 | ||
8634 | bfd_set_error (bfd_error_bad_value); | |
8635 | ret = false; | |
8636 | goto copy_reloc; | |
8637 | } | |
252b5132 | 8638 | |
e7776f52 AM |
8639 | if (sda != NULL) |
8640 | { | |
8641 | if (!is_static_defined (sda)) | |
8642 | { | |
8643 | unresolved_reloc = true; | |
8644 | break; | |
8645 | } | |
8646 | addend -= SYM_VAL (sda); | |
8647 | } | |
252b5132 | 8648 | |
e7776f52 AM |
8649 | if (r_type == R_PPC_EMB_RELSDA) |
8650 | break; | |
bd6c6e2b | 8651 | |
e7776f52 AM |
8652 | /* The PowerPC Embedded Application Binary Interface |
8653 | version 1.0 insanely chose to specify R_PPC_EMB_SDA21 | |
8654 | operating on a 24-bit field at r_offset. GNU as and | |
8655 | GNU ld have always assumed R_PPC_EMB_SDA21 operates on | |
8656 | a 32-bit bit insn at r_offset. Cope with object file | |
8657 | producers that possibly comply with the EABI in | |
8658 | generating an odd r_offset for big-endian objects. */ | |
8659 | if (r_type == R_PPC_EMB_SDA21) | |
8660 | rel->r_offset &= ~1; | |
6f5601c4 | 8661 | |
e7776f52 AM |
8662 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
8663 | if (reg == 0 | |
8664 | && (r_type == R_PPC_VLE_SDA21 | |
8665 | || r_type == R_PPC_VLE_SDA21_LO)) | |
8666 | { | |
8667 | relocation = relocation + addend; | |
8668 | addend = 0; | |
8669 | ||
8670 | /* Force e_li insn, keeping RT from original insn. */ | |
8671 | insn &= 0x1f << 21; | |
8672 | insn |= 28u << 26; | |
8673 | ||
8674 | /* We have an li20 field, bits 17..20, 11..15, 21..31. */ | |
8675 | /* Top 4 bits of value to 17..20. */ | |
8676 | insn |= (relocation & 0xf0000) >> 5; | |
8677 | /* Next 5 bits of the value to 11..15. */ | |
8678 | insn |= (relocation & 0xf800) << 5; | |
8679 | /* And the final 11 bits of the value to bits 21 to 31. */ | |
8680 | insn |= relocation & 0x7ff; | |
8681 | ||
8682 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); | |
8683 | ||
8684 | r = bfd_reloc_ok; | |
8685 | if (r_type == R_PPC_VLE_SDA21 | |
8686 | && ((relocation + 0x80000) & 0xffffffff) > 0x100000) | |
8687 | r = bfd_reloc_overflow; | |
8688 | goto report_reloc; | |
8689 | } | |
8690 | /* Fill in register field. */ | |
8691 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); | |
8692 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); | |
8693 | } | |
252b5132 RH |
8694 | break; |
8695 | ||
b9c361e0 JL |
8696 | case R_PPC_VLE_SDAREL_LO16A: |
8697 | case R_PPC_VLE_SDAREL_LO16D: | |
8698 | case R_PPC_VLE_SDAREL_HI16A: | |
8699 | case R_PPC_VLE_SDAREL_HI16D: | |
8700 | case R_PPC_VLE_SDAREL_HA16A: | |
8701 | case R_PPC_VLE_SDAREL_HA16D: | |
e7776f52 AM |
8702 | if (!offset_in_range (input_section, rel->r_offset, 4)) |
8703 | r = bfd_reloc_outofrange; | |
8704 | else | |
8705 | { | |
8706 | bfd_vma value; | |
8707 | const char *name; | |
8708 | struct elf_link_hash_entry *sda = NULL; | |
b9c361e0 | 8709 | |
e7776f52 AM |
8710 | if (sec == NULL || sec->output_section == NULL) |
8711 | { | |
8712 | unresolved_reloc = true; | |
8713 | break; | |
8714 | } | |
b9c361e0 | 8715 | |
e7776f52 AM |
8716 | name = bfd_section_name (sec->output_section); |
8717 | if (strcmp (name, ".sdata") == 0 | |
8718 | || strcmp (name, ".sbss") == 0) | |
8719 | sda = htab->sdata[0].sym; | |
8720 | else if (strcmp (name, ".sdata2") == 0 | |
8721 | || strcmp (name, ".sbss2") == 0) | |
8722 | sda = htab->sdata[1].sym; | |
8723 | else | |
8724 | { | |
8725 | _bfd_error_handler | |
8726 | /* xgettext:c-format */ | |
8727 | (_("%pB: the target (%s) of a %s relocation is " | |
8728 | "in the wrong output section (%s)"), | |
8729 | input_bfd, | |
8730 | sym_name, | |
8731 | howto->name, | |
8732 | name); | |
8733 | ||
8734 | bfd_set_error (bfd_error_bad_value); | |
8735 | ret = false; | |
8736 | goto copy_reloc; | |
8737 | } | |
86c95733 | 8738 | |
e7776f52 AM |
8739 | if (sda == NULL || !is_static_defined (sda)) |
8740 | { | |
8741 | unresolved_reloc = true; | |
8742 | break; | |
8743 | } | |
8744 | value = relocation + addend - SYM_VAL (sda); | |
8745 | ||
8746 | if (r_type == R_PPC_VLE_SDAREL_LO16A) | |
8747 | r = ppc_elf_vle_split16 (input_bfd, input_section, | |
8748 | rel->r_offset, | |
8749 | contents + rel->r_offset, value, | |
8750 | split16a_type, | |
8751 | htab->params->vle_reloc_fixup); | |
8752 | else if (r_type == R_PPC_VLE_SDAREL_LO16D) | |
8753 | r = ppc_elf_vle_split16 (input_bfd, input_section, | |
8754 | rel->r_offset, | |
8755 | contents + rel->r_offset, value, | |
8756 | split16d_type, | |
8757 | htab->params->vle_reloc_fixup); | |
8758 | else if (r_type == R_PPC_VLE_SDAREL_HI16A) | |
8759 | { | |
8760 | value = value >> 16; | |
8761 | r = ppc_elf_vle_split16 (input_bfd, input_section, | |
8762 | rel->r_offset, | |
8763 | contents + rel->r_offset, value, | |
8764 | split16a_type, | |
8765 | htab->params->vle_reloc_fixup); | |
8766 | } | |
8767 | else if (r_type == R_PPC_VLE_SDAREL_HI16D) | |
8768 | { | |
8769 | value = value >> 16; | |
8770 | r = ppc_elf_vle_split16 (input_bfd, input_section, | |
8771 | rel->r_offset, | |
8772 | contents + rel->r_offset, value, | |
8773 | split16d_type, | |
8774 | htab->params->vle_reloc_fixup); | |
8775 | } | |
8776 | else if (r_type == R_PPC_VLE_SDAREL_HA16A) | |
8777 | { | |
8778 | value = (value + 0x8000) >> 16; | |
8779 | r = ppc_elf_vle_split16 (input_bfd, input_section, | |
8780 | rel->r_offset, | |
8781 | contents + rel->r_offset, value, | |
8782 | split16a_type, | |
8783 | htab->params->vle_reloc_fixup); | |
8784 | } | |
8785 | else if (r_type == R_PPC_VLE_SDAREL_HA16D) | |
8786 | { | |
8787 | value = (value + 0x8000) >> 16; | |
8788 | r = ppc_elf_vle_split16 (input_bfd, input_section, | |
8789 | rel->r_offset, | |
8790 | contents + rel->r_offset, value, | |
8791 | split16d_type, | |
8792 | htab->params->vle_reloc_fixup); | |
8793 | } | |
8794 | else | |
8795 | abort (); | |
8796 | } | |
8797 | goto report_reloc; | |
b9c361e0 | 8798 | |
83eef883 | 8799 | case R_PPC_VLE_ADDR20: |
e7776f52 AM |
8800 | if (!offset_in_range (input_section, rel->r_offset, 4)) |
8801 | r = bfd_reloc_outofrange; | |
8802 | else | |
8803 | { | |
8804 | ppc_elf_vle_split20 (output_bfd, contents + rel->r_offset, | |
8805 | relocation); | |
8806 | r = bfd_reloc_ok; | |
8807 | } | |
8808 | goto report_reloc; | |
83eef883 | 8809 | |
70bccea4 | 8810 | /* Relocate against the beginning of the section. */ |
7619e7c7 AM |
8811 | case R_PPC_SECTOFF: |
8812 | case R_PPC_SECTOFF_LO: | |
8813 | case R_PPC_SECTOFF_HI: | |
8814 | case R_PPC_SECTOFF_HA: | |
3b4f3a11 AM |
8815 | if (sec == NULL || sec->output_section == NULL) |
8816 | { | |
0a1b45a2 | 8817 | unresolved_reloc = true; |
3b4f3a11 AM |
8818 | break; |
8819 | } | |
252b5132 | 8820 | addend -= sec->output_section->vma; |
252b5132 RH |
8821 | break; |
8822 | ||
70bccea4 | 8823 | /* Negative relocations. */ |
7619e7c7 AM |
8824 | case R_PPC_EMB_NADDR32: |
8825 | case R_PPC_EMB_NADDR16: | |
8826 | case R_PPC_EMB_NADDR16_LO: | |
8827 | case R_PPC_EMB_NADDR16_HI: | |
8828 | case R_PPC_EMB_NADDR16_HA: | |
8da6118f | 8829 | addend -= 2 * relocation; |
252b5132 RH |
8830 | break; |
8831 | ||
7619e7c7 AM |
8832 | case R_PPC_COPY: |
8833 | case R_PPC_GLOB_DAT: | |
8834 | case R_PPC_JMP_SLOT: | |
8835 | case R_PPC_RELATIVE: | |
e054468f | 8836 | case R_PPC_IRELATIVE: |
7619e7c7 AM |
8837 | case R_PPC_PLT32: |
8838 | case R_PPC_PLTREL32: | |
7619e7c7 AM |
8839 | case R_PPC_ADDR30: |
8840 | case R_PPC_EMB_RELSEC16: | |
8841 | case R_PPC_EMB_RELST_LO: | |
8842 | case R_PPC_EMB_RELST_HI: | |
8843 | case R_PPC_EMB_RELST_HA: | |
8844 | case R_PPC_EMB_BIT_FLD: | |
cf97bcb0 AM |
8845 | /* xgettext:c-format */ |
8846 | _bfd_error_handler (_("%pB: %s unsupported"), | |
8847 | input_bfd, howto->name); | |
252b5132 RH |
8848 | |
8849 | bfd_set_error (bfd_error_invalid_operation); | |
0a1b45a2 | 8850 | ret = false; |
c316a17c | 8851 | goto copy_reloc; |
7619e7c7 | 8852 | } |
252b5132 | 8853 | |
252dcdf4 AM |
8854 | switch (r_type) |
8855 | { | |
8856 | default: | |
8857 | break; | |
8858 | ||
8859 | case R_PPC_TPREL16_HA: | |
e7776f52 AM |
8860 | if (htab->do_tls_opt |
8861 | && relocation + addend + 0x8000 < 0x10000 | |
8862 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) | |
8863 | ||
252dcdf4 AM |
8864 | { |
8865 | bfd_byte *p = contents + (rel->r_offset & ~3); | |
8866 | bfd_put_32 (input_bfd, NOP, p); | |
8867 | } | |
8868 | break; | |
8869 | ||
8870 | case R_PPC_TPREL16_LO: | |
e7776f52 AM |
8871 | if (htab->do_tls_opt |
8872 | && relocation + addend + 0x8000 < 0x10000 | |
8873 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) | |
252dcdf4 AM |
8874 | { |
8875 | bfd_byte *p = contents + (rel->r_offset & ~3); | |
8876 | unsigned int insn = bfd_get_32 (input_bfd, p); | |
8877 | insn &= ~(0x1f << 16); | |
8878 | insn |= 2 << 16; | |
8879 | bfd_put_32 (input_bfd, insn, p); | |
8880 | } | |
8881 | break; | |
8882 | } | |
8883 | ||
23cedd1d AM |
8884 | switch (r_type) |
8885 | { | |
8886 | default: | |
8887 | break; | |
8888 | ||
8889 | case R_PPC_PLTCALL: | |
8890 | if (unresolved_reloc) | |
8891 | { | |
e7776f52 AM |
8892 | if (offset_in_range (input_section, rel->r_offset, 4)) |
8893 | { | |
8894 | bfd_byte *p = contents + rel->r_offset; | |
8895 | unsigned int insn = bfd_get_32 (input_bfd, p); | |
8896 | insn &= 1; | |
8897 | bfd_put_32 (input_bfd, B | insn, p); | |
8898 | unresolved_reloc = save_unresolved_reloc; | |
8899 | r_type = R_PPC_REL24; | |
8900 | howto = ppc_elf_howto_table[r_type]; | |
8901 | } | |
23cedd1d AM |
8902 | } |
8903 | else if (htab->plt_type != PLT_NEW) | |
8904 | info->callbacks->einfo | |
482f3505 | 8905 | (_("%X%P: %H: %s relocation unsupported for bss-plt\n"), |
23cedd1d AM |
8906 | input_bfd, input_section, rel->r_offset, |
8907 | howto->name); | |
8908 | break; | |
8909 | ||
8910 | case R_PPC_PLTSEQ: | |
8911 | case R_PPC_PLT16_HA: | |
8912 | case R_PPC_PLT16_LO: | |
8913 | if (unresolved_reloc) | |
8914 | { | |
e7776f52 AM |
8915 | if (offset_in_range (input_section, rel->r_offset & ~3, 4)) |
8916 | { | |
8917 | bfd_byte *p = contents + (rel->r_offset & ~3); | |
8918 | bfd_put_32 (input_bfd, NOP, p); | |
8919 | unresolved_reloc = false; | |
8920 | r_type = R_PPC_NONE; | |
8921 | howto = ppc_elf_howto_table[r_type]; | |
8922 | } | |
23cedd1d AM |
8923 | } |
8924 | else if (htab->plt_type != PLT_NEW) | |
8925 | info->callbacks->einfo | |
482f3505 | 8926 | (_("%X%P: %H: %s relocation unsupported for bss-plt\n"), |
23cedd1d AM |
8927 | input_bfd, input_section, rel->r_offset, |
8928 | howto->name); | |
8929 | break; | |
8930 | } | |
8931 | ||
7619e7c7 AM |
8932 | /* Do any further special processing. */ |
8933 | switch (r_type) | |
8934 | { | |
8935 | default: | |
8936 | break; | |
8937 | ||
8938 | case R_PPC_ADDR16_HA: | |
d7128ce4 | 8939 | case R_PPC_REL16_HA: |
a680de9a | 8940 | case R_PPC_REL16DX_HA: |
7619e7c7 AM |
8941 | case R_PPC_SECTOFF_HA: |
8942 | case R_PPC_TPREL16_HA: | |
8943 | case R_PPC_DTPREL16_HA: | |
7619e7c7 AM |
8944 | case R_PPC_EMB_NADDR16_HA: |
8945 | case R_PPC_EMB_RELST_HA: | |
8946 | /* It's just possible that this symbol is a weak symbol | |
7b609f53 | 8947 | that's not actually defined anywhere. In that case, |
7619e7c7 AM |
8948 | 'sec' would be NULL, and we should leave the symbol |
8949 | alone (it will be set to zero elsewhere in the link). */ | |
5c5f6e17 AM |
8950 | if (sec == NULL) |
8951 | break; | |
1a0670f3 | 8952 | /* Fall through. */ |
5c5f6e17 AM |
8953 | |
8954 | case R_PPC_PLT16_HA: | |
8955 | case R_PPC_GOT16_HA: | |
8956 | case R_PPC_GOT_TLSGD16_HA: | |
8957 | case R_PPC_GOT_TLSLD16_HA: | |
8958 | case R_PPC_GOT_TPREL16_HA: | |
8959 | case R_PPC_GOT_DTPREL16_HA: | |
8960 | /* Add 0x10000 if sign bit in 0:15 is set. | |
8961 | Bits 0:15 are not used. */ | |
8962 | addend += 0x8000; | |
7619e7c7 | 8963 | break; |
1fe532cf AM |
8964 | |
8965 | case R_PPC_ADDR16: | |
8966 | case R_PPC_ADDR16_LO: | |
8967 | case R_PPC_GOT16: | |
8968 | case R_PPC_GOT16_LO: | |
8969 | case R_PPC_SDAREL16: | |
8970 | case R_PPC_SECTOFF: | |
8971 | case R_PPC_SECTOFF_LO: | |
8972 | case R_PPC_DTPREL16: | |
8973 | case R_PPC_DTPREL16_LO: | |
8974 | case R_PPC_TPREL16: | |
8975 | case R_PPC_TPREL16_LO: | |
8976 | case R_PPC_GOT_TLSGD16: | |
8977 | case R_PPC_GOT_TLSGD16_LO: | |
8978 | case R_PPC_GOT_TLSLD16: | |
8979 | case R_PPC_GOT_TLSLD16_LO: | |
8980 | case R_PPC_GOT_DTPREL16: | |
8981 | case R_PPC_GOT_DTPREL16_LO: | |
8982 | case R_PPC_GOT_TPREL16: | |
8983 | case R_PPC_GOT_TPREL16_LO: | |
e7776f52 AM |
8984 | if (offset_in_range (input_section, rel->r_offset - d_offset, 4)) |
8985 | { | |
8986 | /* The 32-bit ABI lacks proper relocations to deal with | |
8987 | certain 64-bit instructions. Prevent damage to bits | |
8988 | that make up part of the insn opcode. */ | |
8989 | unsigned int insn, mask, lobit; | |
8990 | ||
8991 | insn = bfd_get_32 (input_bfd, | |
8992 | contents + rel->r_offset - d_offset); | |
8993 | mask = 0; | |
8994 | if (is_insn_ds_form (insn)) | |
8995 | mask = 3; | |
8996 | else if (is_insn_dq_form (insn)) | |
8997 | mask = 15; | |
8998 | else | |
8999 | break; | |
9000 | relocation += addend; | |
9001 | addend = insn & mask; | |
9002 | lobit = mask & relocation; | |
9003 | if (lobit != 0) | |
9004 | { | |
9005 | relocation ^= lobit; | |
9006 | info->callbacks->einfo | |
9007 | /* xgettext:c-format */ | |
9008 | (_("%H: error: %s against `%s' not a multiple of %u\n"), | |
9009 | input_bfd, input_section, rel->r_offset, | |
9010 | howto->name, sym_name, mask + 1); | |
9011 | bfd_set_error (bfd_error_bad_value); | |
9012 | ret = false; | |
9013 | } | |
9014 | } | |
1fe532cf | 9015 | break; |
252b5132 RH |
9016 | } |
9017 | ||
252b5132 | 9018 | #ifdef DEBUG |
55fd94b0 AM |
9019 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " |
9020 | "offset = %ld, addend = %ld\n", | |
252b5132 | 9021 | howto->name, |
8da6118f | 9022 | (int) r_type, |
252b5132 RH |
9023 | sym_name, |
9024 | r_symndx, | |
7619e7c7 | 9025 | (long) rel->r_offset, |
8da6118f | 9026 | (long) addend); |
252b5132 RH |
9027 | #endif |
9028 | ||
7619e7c7 AM |
9029 | if (unresolved_reloc |
9030 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
1d5316ab AM |
9031 | && h->def_dynamic) |
9032 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
9033 | rel->r_offset) != (bfd_vma) -1) | |
7619e7c7 | 9034 | { |
25f53a85 | 9035 | info->callbacks->einfo |
695344c0 | 9036 | /* xgettext:c-format */ |
174d0a74 | 9037 | (_("%H: unresolvable %s relocation against symbol `%s'\n"), |
25f53a85 | 9038 | input_bfd, input_section, rel->r_offset, |
7b609f53 | 9039 | howto->name, |
7619e7c7 | 9040 | sym_name); |
0a1b45a2 | 9041 | ret = false; |
7619e7c7 AM |
9042 | } |
9043 | ||
86c95733 AM |
9044 | /* 16-bit fields in insns mostly have signed values, but a |
9045 | few insns have 16-bit unsigned values. Really, we should | |
9046 | have different reloc types. */ | |
9047 | if (howto->complain_on_overflow != complain_overflow_dont | |
9048 | && howto->dst_mask == 0xffff | |
e7776f52 AM |
9049 | && (input_section->flags & SEC_CODE) != 0 |
9050 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) | |
86c95733 AM |
9051 | { |
9052 | enum complain_overflow complain = complain_overflow_signed; | |
9053 | ||
9054 | if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0) | |
9055 | { | |
9056 | unsigned int insn; | |
9057 | ||
9058 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); | |
2365f8d7 | 9059 | if ((insn & (0x3fu << 26)) == 10u << 26 /* cmpli */) |
a47622ac | 9060 | complain = complain_overflow_bitfield; |
2365f8d7 AM |
9061 | else if ((insn & (0x3fu << 26)) == 28u << 26 /* andi */ |
9062 | || (insn & (0x3fu << 26)) == 24u << 26 /* ori */ | |
9063 | || (insn & (0x3fu << 26)) == 26u << 26 /* xori */) | |
86c95733 AM |
9064 | complain = complain_overflow_unsigned; |
9065 | } | |
9066 | if (howto->complain_on_overflow != complain) | |
9067 | { | |
9068 | alt_howto = *howto; | |
9069 | alt_howto.complain_on_overflow = complain; | |
9070 | howto = &alt_howto; | |
9071 | } | |
9072 | } | |
9073 | ||
a680de9a PB |
9074 | if (r_type == R_PPC_REL16DX_HA) |
9075 | { | |
9076 | /* Split field reloc isn't handled by _bfd_final_link_relocate. */ | |
e7776f52 | 9077 | if (offset_in_range (input_section, rel->r_offset, 4)) |
a680de9a PB |
9078 | r = bfd_reloc_outofrange; |
9079 | else | |
9080 | { | |
9081 | unsigned int insn; | |
9082 | ||
9083 | relocation += addend; | |
9084 | relocation -= (rel->r_offset | |
9085 | + input_section->output_offset | |
9086 | + input_section->output_section->vma); | |
9087 | relocation >>= 16; | |
9088 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
9089 | insn &= ~0x1fffc1; | |
9090 | insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); | |
9091 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); | |
9092 | r = bfd_reloc_ok; | |
9093 | } | |
9094 | } | |
9095 | else | |
9096 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, | |
9097 | rel->r_offset, relocation, addend); | |
252b5132 | 9098 | |
e7776f52 | 9099 | report_reloc: |
7619e7c7 | 9100 | if (r != bfd_reloc_ok) |
252b5132 | 9101 | { |
7619e7c7 | 9102 | if (r == bfd_reloc_overflow) |
252b5132 | 9103 | { |
8131c122 AM |
9104 | /* On code like "if (foo) foo();" don't report overflow |
9105 | on a branch to zero when foo is undefined. */ | |
9106 | if (!warned | |
9107 | && !(h != NULL | |
9108 | && (h->root.type == bfd_link_hash_undefweak | |
9109 | || h->root.type == bfd_link_hash_undefined) | |
9110 | && is_branch_reloc (r_type))) | |
1a72702b AM |
9111 | info->callbacks->reloc_overflow |
9112 | (info, (h ? &h->root : NULL), sym_name, howto->name, | |
9113 | rel->r_addend, input_bfd, input_section, rel->r_offset); | |
dc1bc0c9 RH |
9114 | } |
9115 | else | |
9116 | { | |
25f53a85 | 9117 | info->callbacks->einfo |
695344c0 | 9118 | /* xgettext:c-format */ |
174d0a74 | 9119 | (_("%H: %s reloc against `%s': error %d\n"), |
25f53a85 AM |
9120 | input_bfd, input_section, rel->r_offset, |
9121 | howto->name, sym_name, (int) r); | |
0a1b45a2 | 9122 | ret = false; |
252b5132 RH |
9123 | } |
9124 | } | |
c316a17c AM |
9125 | copy_reloc: |
9126 | if (wrel != rel) | |
9127 | *wrel = *rel; | |
9128 | } | |
9129 | ||
9130 | if (wrel != rel) | |
9131 | { | |
9132 | Elf_Internal_Shdr *rel_hdr; | |
9133 | size_t deleted = rel - wrel; | |
9134 | ||
9135 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
9136 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
9137 | if (rel_hdr->sh_size == 0) | |
9138 | { | |
9139 | /* It is too late to remove an empty reloc section. Leave | |
9140 | one NONE reloc. | |
9141 | ??? What is wrong with an empty section??? */ | |
9142 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
9143 | deleted -= 1; | |
9144 | wrel++; | |
9145 | } | |
9146 | relend = wrel; | |
9147 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
9148 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
9149 | input_section->reloc_count -= deleted; | |
252b5132 RH |
9150 | } |
9151 | ||
252b5132 RH |
9152 | #ifdef DEBUG |
9153 | fprintf (stderr, "\n"); | |
9154 | #endif | |
9155 | ||
53291d1f AM |
9156 | if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET |
9157 | && input_section->size != input_section->rawsize | |
9158 | && (strcmp (input_section->output_section->name, ".init") == 0 | |
9159 | || strcmp (input_section->output_section->name, ".fini") == 0)) | |
9160 | { | |
9161 | /* Branch around the trampolines. */ | |
9162 | unsigned int insn = B + input_section->size - input_section->rawsize; | |
9163 | bfd_put_32 (input_bfd, insn, contents + input_section->rawsize); | |
9164 | } | |
9165 | ||
5446cbdf | 9166 | if (htab->params->ppc476_workaround |
795bc6b3 | 9167 | && input_section->sec_info_type == SEC_INFO_TYPE_TARGET |
0e1862bb | 9168 | && (!bfd_link_relocatable (info) |
795bc6b3 AM |
9169 | || (input_section->output_section->alignment_power |
9170 | >= htab->params->pagesize_p2))) | |
5446cbdf | 9171 | { |
5446cbdf | 9172 | bfd_vma start_addr, end_addr, addr; |
795bc6b3 | 9173 | bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; |
5446cbdf | 9174 | |
5446cbdf | 9175 | if (relax_info->workaround_size != 0) |
40fd06d1 AM |
9176 | { |
9177 | bfd_byte *p; | |
9178 | unsigned int n; | |
9179 | bfd_byte fill[4]; | |
9180 | ||
9181 | bfd_put_32 (input_bfd, BA, fill); | |
9182 | p = contents + input_section->size - relax_info->workaround_size; | |
9183 | n = relax_info->workaround_size >> 2; | |
9184 | while (n--) | |
9185 | { | |
9186 | memcpy (p, fill, 4); | |
9187 | p += 4; | |
9188 | } | |
9189 | } | |
5446cbdf AM |
9190 | |
9191 | /* The idea is: Replace the last instruction on a page with a | |
9192 | branch to a patch area. Put the insn there followed by a | |
9193 | branch back to the next page. Complicated a little by | |
9194 | needing to handle moved conditional branches, and by not | |
9195 | wanting to touch data-in-text. */ | |
9196 | ||
9197 | start_addr = (input_section->output_section->vma | |
9198 | + input_section->output_offset); | |
9199 | end_addr = (start_addr + input_section->size | |
9200 | - relax_info->workaround_size); | |
9201 | for (addr = ((start_addr & -pagesize) + pagesize - 4); | |
9202 | addr < end_addr; | |
9203 | addr += pagesize) | |
9204 | { | |
9205 | bfd_vma offset = addr - start_addr; | |
9206 | Elf_Internal_Rela *lo, *hi; | |
0a1b45a2 | 9207 | bool is_data; |
5446cbdf AM |
9208 | bfd_vma patch_off, patch_addr; |
9209 | unsigned int insn; | |
9210 | ||
9211 | /* Do we have a data reloc at this offset? If so, leave | |
9212 | the word alone. */ | |
0a1b45a2 | 9213 | is_data = false; |
5446cbdf | 9214 | lo = relocs; |
668e22e5 AM |
9215 | hi = relend; |
9216 | rel = NULL; | |
5446cbdf AM |
9217 | while (lo < hi) |
9218 | { | |
9219 | rel = lo + (hi - lo) / 2; | |
9220 | if (rel->r_offset < offset) | |
9221 | lo = rel + 1; | |
668e22e5 | 9222 | else if (rel->r_offset > offset + 3) |
5446cbdf AM |
9223 | hi = rel; |
9224 | else | |
9225 | { | |
9226 | switch (ELF32_R_TYPE (rel->r_info)) | |
9227 | { | |
9228 | case R_PPC_ADDR32: | |
9229 | case R_PPC_UADDR32: | |
9230 | case R_PPC_REL32: | |
9231 | case R_PPC_ADDR30: | |
0a1b45a2 | 9232 | is_data = true; |
5446cbdf AM |
9233 | break; |
9234 | default: | |
9235 | break; | |
9236 | } | |
9237 | break; | |
9238 | } | |
9239 | } | |
9240 | if (is_data) | |
9241 | continue; | |
9242 | ||
b4ab4364 AM |
9243 | /* Some instructions can be left alone too. Unconditional |
9244 | branches, except for bcctr with BO=0x14 (bctr, bctrl), | |
9245 | avoid the icache failure. | |
9246 | ||
9247 | The problem occurs due to prefetch across a page boundary | |
9248 | where stale instructions can be fetched from the next | |
9249 | page, and the mechanism for flushing these bad | |
9250 | instructions fails under certain circumstances. The | |
9251 | unconditional branches: | |
9252 | 1) Branch: b, bl, ba, bla, | |
9253 | 2) Branch Conditional: bc, bca, bcl, bcla, | |
9254 | 3) Branch Conditional to Link Register: bclr, bclrl, | |
9255 | where (2) and (3) have BO=0x14 making them unconditional, | |
9256 | prevent the bad prefetch because the prefetch itself is | |
9257 | affected by these instructions. This happens even if the | |
9258 | instruction is not executed. | |
9259 | ||
9260 | A bctr example: | |
9261 | . | |
9262 | . lis 9,new_page@ha | |
9263 | . addi 9,9,new_page@l | |
9264 | . mtctr 9 | |
9265 | . bctr | |
9266 | . nop | |
9267 | . nop | |
9268 | . new_page: | |
9269 | . | |
9270 | The bctr is not predicted taken due to ctr not being | |
9271 | ready, so prefetch continues on past the bctr into the | |
9272 | new page which might have stale instructions. If they | |
9273 | fail to be flushed, then they will be executed after the | |
9274 | bctr executes. Either of the following modifications | |
9275 | prevent the bad prefetch from happening in the first | |
9276 | place: | |
9277 | . | |
1b786873 L |
9278 | . lis 9,new_page@ha lis 9,new_page@ha |
9279 | . addi 9,9,new_page@l addi 9,9,new_page@l | |
9280 | . mtctr 9 mtctr 9 | |
9281 | . bctr bctr | |
b4ab4364 | 9282 | . nop b somewhere_else |
1b786873 L |
9283 | . b somewhere_else nop |
9284 | . new_page: new_page: | |
b4ab4364 | 9285 | . */ |
5446cbdf | 9286 | insn = bfd_get_32 (input_bfd, contents + offset); |
2365f8d7 AM |
9287 | if ((insn & (0x3fu << 26)) == (18u << 26) /* b,bl,ba,bla */ |
9288 | || ((insn & (0x3fu << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/ | |
07d6d2b8 | 9289 | && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */ |
2365f8d7 | 9290 | || ((insn & (0x3fu << 26)) == (19u << 26) |
b4ab4364 | 9291 | && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */ |
07d6d2b8 | 9292 | && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */ |
5446cbdf AM |
9293 | continue; |
9294 | ||
9295 | patch_addr = (start_addr + input_section->size | |
9296 | - relax_info->workaround_size); | |
9297 | patch_addr = (patch_addr + 15) & -16; | |
9298 | patch_off = patch_addr - start_addr; | |
9299 | bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset); | |
668e22e5 AM |
9300 | |
9301 | if (rel != NULL | |
9302 | && rel->r_offset >= offset | |
9303 | && rel->r_offset < offset + 4) | |
9304 | { | |
f8b44781 AM |
9305 | asection *sreloc; |
9306 | ||
668e22e5 AM |
9307 | /* If the insn we are patching had a reloc, adjust the |
9308 | reloc r_offset so that the reloc applies to the moved | |
9309 | location. This matters for -r and --emit-relocs. */ | |
9310 | if (rel + 1 != relend) | |
9311 | { | |
9312 | Elf_Internal_Rela tmp = *rel; | |
9313 | ||
9314 | /* Keep the relocs sorted by r_offset. */ | |
9315 | memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel)); | |
9316 | relend[-1] = tmp; | |
9317 | } | |
9318 | relend[-1].r_offset += patch_off - offset; | |
f8b44781 AM |
9319 | |
9320 | /* Adjust REL16 addends too. */ | |
9321 | switch (ELF32_R_TYPE (relend[-1].r_info)) | |
9322 | { | |
9323 | case R_PPC_REL16: | |
9324 | case R_PPC_REL16_LO: | |
9325 | case R_PPC_REL16_HI: | |
9326 | case R_PPC_REL16_HA: | |
9327 | relend[-1].r_addend += patch_off - offset; | |
9328 | break; | |
9329 | default: | |
9330 | break; | |
9331 | } | |
9332 | ||
9333 | /* If we are building a PIE or shared library with | |
9334 | non-PIC objects, perhaps we had a dynamic reloc too? | |
9335 | If so, the dynamic reloc must move with the insn. */ | |
9336 | sreloc = elf_section_data (input_section)->sreloc; | |
9337 | if (sreloc != NULL) | |
9338 | { | |
1d5c94cb | 9339 | Elf32_External_Rela *slo, *shi, *srelend; |
f8b44781 AM |
9340 | bfd_vma soffset; |
9341 | ||
1d5c94cb AM |
9342 | slo = (Elf32_External_Rela *) sreloc->contents; |
9343 | shi = srelend = slo + sreloc->reloc_count; | |
f8b44781 AM |
9344 | soffset = (offset + input_section->output_section->vma |
9345 | + input_section->output_offset); | |
9346 | while (slo < shi) | |
9347 | { | |
1d5c94cb AM |
9348 | Elf32_External_Rela *srel = slo + (shi - slo) / 2; |
9349 | bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel, | |
9350 | &outrel); | |
f8b44781 AM |
9351 | if (outrel.r_offset < soffset) |
9352 | slo = srel + 1; | |
9353 | else if (outrel.r_offset > soffset + 3) | |
9354 | shi = srel; | |
9355 | else | |
9356 | { | |
1d5c94cb | 9357 | if (srel + 1 != srelend) |
f8b44781 | 9358 | { |
1d5c94cb AM |
9359 | memmove (srel, srel + 1, |
9360 | (srelend - (srel + 1)) * sizeof (*srel)); | |
9361 | srel = srelend - 1; | |
f8b44781 AM |
9362 | } |
9363 | outrel.r_offset += patch_off - offset; | |
1d5c94cb AM |
9364 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
9365 | (bfd_byte *) srel); | |
f8b44781 AM |
9366 | break; |
9367 | } | |
9368 | } | |
9369 | } | |
668e22e5 AM |
9370 | } |
9371 | else | |
9372 | rel = NULL; | |
9373 | ||
2365f8d7 | 9374 | if ((insn & (0x3fu << 26)) == (16u << 26) /* bc */ |
5446cbdf AM |
9375 | && (insn & 2) == 0 /* relative */) |
9376 | { | |
9377 | bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000; | |
9378 | ||
9379 | delta += offset - patch_off; | |
0e1862bb | 9380 | if (bfd_link_relocatable (info) && rel != NULL) |
668e22e5 | 9381 | delta = 0; |
0e1862bb | 9382 | if (!bfd_link_relocatable (info) && rel != NULL) |
668e22e5 AM |
9383 | { |
9384 | enum elf_ppc_reloc_type r_type; | |
9385 | ||
9386 | r_type = ELF32_R_TYPE (relend[-1].r_info); | |
9387 | if (r_type == R_PPC_REL14_BRTAKEN) | |
9388 | insn |= BRANCH_PREDICT_BIT; | |
9389 | else if (r_type == R_PPC_REL14_BRNTAKEN) | |
9390 | insn &= ~BRANCH_PREDICT_BIT; | |
9391 | else | |
9392 | BFD_ASSERT (r_type == R_PPC_REL14); | |
9393 | ||
9394 | if ((r_type == R_PPC_REL14_BRTAKEN | |
9395 | || r_type == R_PPC_REL14_BRNTAKEN) | |
9396 | && delta + 0x8000 < 0x10000 | |
9397 | && (bfd_signed_vma) delta < 0) | |
9398 | insn ^= BRANCH_PREDICT_BIT; | |
9399 | } | |
5446cbdf AM |
9400 | if (delta + 0x8000 < 0x10000) |
9401 | { | |
9402 | bfd_put_32 (input_bfd, | |
9403 | (insn & ~0xfffc) | (delta & 0xfffc), | |
9404 | contents + patch_off); | |
9405 | patch_off += 4; | |
9406 | bfd_put_32 (input_bfd, | |
9407 | B | ((offset + 4 - patch_off) & 0x3fffffc), | |
9408 | contents + patch_off); | |
9409 | patch_off += 4; | |
9410 | } | |
9411 | else | |
9412 | { | |
668e22e5 AM |
9413 | if (rel != NULL) |
9414 | { | |
9415 | unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info); | |
9416 | ||
9417 | relend[-1].r_offset += 8; | |
9418 | relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24); | |
9419 | } | |
5446cbdf AM |
9420 | bfd_put_32 (input_bfd, |
9421 | (insn & ~0xfffc) | 8, | |
9422 | contents + patch_off); | |
9423 | patch_off += 4; | |
9424 | bfd_put_32 (input_bfd, | |
9425 | B | ((offset + 4 - patch_off) & 0x3fffffc), | |
9426 | contents + patch_off); | |
9427 | patch_off += 4; | |
9428 | bfd_put_32 (input_bfd, | |
9429 | B | ((delta - 8) & 0x3fffffc), | |
9430 | contents + patch_off); | |
9431 | patch_off += 4; | |
9432 | } | |
9433 | } | |
9434 | else | |
9435 | { | |
9436 | bfd_put_32 (input_bfd, insn, contents + patch_off); | |
9437 | patch_off += 4; | |
9438 | bfd_put_32 (input_bfd, | |
9439 | B | ((offset + 4 - patch_off) & 0x3fffffc), | |
9440 | contents + patch_off); | |
9441 | patch_off += 4; | |
9442 | } | |
9443 | BFD_ASSERT (patch_off <= input_section->size); | |
9444 | relax_info->workaround_size = input_section->size - patch_off; | |
9445 | } | |
9446 | } | |
9447 | ||
252b5132 RH |
9448 | return ret; |
9449 | } | |
252b5132 | 9450 | \f |
49c09209 | 9451 | /* Write out the PLT relocs and entries for H. */ |
c5fccbec | 9452 | |
0a1b45a2 | 9453 | static bool |
49c09209 | 9454 | write_global_sym_plt (struct elf_link_hash_entry *h, void *inf) |
e1a9cb8e | 9455 | { |
49c09209 AM |
9456 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
9457 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); | |
a6aa5195 | 9458 | struct plt_entry *ent; |
0a1b45a2 | 9459 | bool doneone; |
e1a9cb8e | 9460 | |
0a1b45a2 | 9461 | doneone = false; |
a6aa5195 AM |
9462 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
9463 | if (ent->plt.offset != (bfd_vma) -1) | |
9464 | { | |
0a1b45a2 | 9465 | bool dyn = !use_local_plt (info, h); |
30845f11 | 9466 | |
a6aa5195 AM |
9467 | if (!doneone) |
9468 | { | |
9469 | Elf_Internal_Rela rela; | |
9470 | bfd_byte *loc; | |
9471 | bfd_vma reloc_index; | |
2d7ad24e AM |
9472 | asection *plt = htab->elf.splt; |
9473 | asection *relplt = htab->elf.srelplt; | |
e1a9cb8e | 9474 | |
30845f11 | 9475 | if (htab->plt_type == PLT_NEW || !dyn) |
9d8504b1 PB |
9476 | reloc_index = ent->plt.offset / 4; |
9477 | else | |
9478 | { | |
9479 | reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) | |
9480 | / htab->plt_slot_size); | |
9481 | if (reloc_index > PLT_NUM_SINGLE_ENTRIES | |
4a3dc543 | 9482 | && htab->plt_type == PLT_OLD) |
9d8504b1 PB |
9483 | reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; |
9484 | } | |
9485 | ||
a6aa5195 AM |
9486 | /* This symbol has an entry in the procedure linkage table. |
9487 | Set it up. */ | |
30845f11 | 9488 | if (htab->plt_type == PLT_VXWORKS && dyn) |
a6aa5195 | 9489 | { |
9d8504b1 PB |
9490 | bfd_vma got_offset; |
9491 | const bfd_vma *plt_entry; | |
5b914448 | 9492 | |
9d8504b1 PB |
9493 | /* The first three entries in .got.plt are reserved. */ |
9494 | got_offset = (reloc_index + 3) * 4; | |
9495 | ||
9496 | /* Use the right PLT. */ | |
0e1862bb | 9497 | plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry |
9d8504b1 PB |
9498 | : ppc_elf_vxworks_plt_entry; |
9499 | ||
9500 | /* Fill in the .plt on VxWorks. */ | |
0e1862bb | 9501 | if (bfd_link_pic (info)) |
9d8504b1 | 9502 | { |
49c09209 | 9503 | bfd_put_32 (info->output_bfd, |
e87d4038 | 9504 | plt_entry[0] | PPC_HA (got_offset), |
2d7ad24e | 9505 | plt->contents + ent->plt.offset + 0); |
49c09209 | 9506 | bfd_put_32 (info->output_bfd, |
e87d4038 | 9507 | plt_entry[1] | PPC_LO (got_offset), |
2d7ad24e | 9508 | plt->contents + ent->plt.offset + 4); |
9d8504b1 PB |
9509 | } |
9510 | else | |
9511 | { | |
e87d4038 | 9512 | bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); |
9d8504b1 | 9513 | |
49c09209 | 9514 | bfd_put_32 (info->output_bfd, |
e87d4038 | 9515 | plt_entry[0] | PPC_HA (got_loc), |
2d7ad24e | 9516 | plt->contents + ent->plt.offset + 0); |
49c09209 | 9517 | bfd_put_32 (info->output_bfd, |
e87d4038 | 9518 | plt_entry[1] | PPC_LO (got_loc), |
2d7ad24e | 9519 | plt->contents + ent->plt.offset + 4); |
9d8504b1 PB |
9520 | } |
9521 | ||
49c09209 | 9522 | bfd_put_32 (info->output_bfd, plt_entry[2], |
2d7ad24e | 9523 | plt->contents + ent->plt.offset + 8); |
49c09209 | 9524 | bfd_put_32 (info->output_bfd, plt_entry[3], |
2d7ad24e | 9525 | plt->contents + ent->plt.offset + 12); |
9d8504b1 PB |
9526 | |
9527 | /* This instruction is an immediate load. The value loaded is | |
9528 | the byte offset of the R_PPC_JMP_SLOT relocation from the | |
9529 | start of the .rela.plt section. The value is stored in the | |
9530 | low-order 16 bits of the load instruction. */ | |
9531 | /* NOTE: It appears that this is now an index rather than a | |
9532 | prescaled offset. */ | |
49c09209 | 9533 | bfd_put_32 (info->output_bfd, |
9d8504b1 | 9534 | plt_entry[4] | reloc_index, |
2d7ad24e | 9535 | plt->contents + ent->plt.offset + 16); |
9d8504b1 PB |
9536 | /* This instruction is a PC-relative branch whose target is |
9537 | the start of the PLT section. The address of this branch | |
9538 | instruction is 20 bytes beyond the start of this PLT entry. | |
9539 | The address is encoded in bits 6-29, inclusive. The value | |
9540 | stored is right-shifted by two bits, permitting a 26-bit | |
9541 | offset. */ | |
49c09209 | 9542 | bfd_put_32 (info->output_bfd, |
5b914448 | 9543 | (plt_entry[5] |
9d8504b1 | 9544 | | (-(ent->plt.offset + 20) & 0x03fffffc)), |
2d7ad24e | 9545 | plt->contents + ent->plt.offset + 20); |
49c09209 | 9546 | bfd_put_32 (info->output_bfd, plt_entry[6], |
2d7ad24e | 9547 | plt->contents + ent->plt.offset + 24); |
49c09209 | 9548 | bfd_put_32 (info->output_bfd, plt_entry[7], |
2d7ad24e | 9549 | plt->contents + ent->plt.offset + 28); |
9d8504b1 PB |
9550 | |
9551 | /* Fill in the GOT entry corresponding to this PLT slot with | |
a8685210 | 9552 | the address immediately after the "bctr" instruction |
9d8504b1 | 9553 | in this PLT entry. */ |
2d7ad24e AM |
9554 | bfd_put_32 (info->output_bfd, (plt->output_section->vma |
9555 | + plt->output_offset | |
9556 | + ent->plt.offset + 16), | |
ce558b89 | 9557 | htab->elf.sgotplt->contents + got_offset); |
9d8504b1 | 9558 | |
0e1862bb | 9559 | if (!bfd_link_pic (info)) |
9d8504b1 PB |
9560 | { |
9561 | /* Fill in a couple of entries in .rela.plt.unloaded. */ | |
9562 | loc = htab->srelplt2->contents | |
9563 | + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index | |
9564 | * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) | |
9565 | * sizeof (Elf32_External_Rela)); | |
9566 | ||
9567 | /* Provide the @ha relocation for the first instruction. */ | |
2d7ad24e AM |
9568 | rela.r_offset = (plt->output_section->vma |
9569 | + plt->output_offset | |
9d8504b1 | 9570 | + ent->plt.offset + 2); |
636ce3f5 | 9571 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
9d8504b1 PB |
9572 | R_PPC_ADDR16_HA); |
9573 | rela.r_addend = got_offset; | |
49c09209 | 9574 | bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc); |
9d8504b1 PB |
9575 | loc += sizeof (Elf32_External_Rela); |
9576 | ||
9577 | /* Provide the @l relocation for the second instruction. */ | |
2d7ad24e AM |
9578 | rela.r_offset = (plt->output_section->vma |
9579 | + plt->output_offset | |
9d8504b1 | 9580 | + ent->plt.offset + 6); |
636ce3f5 | 9581 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
9d8504b1 PB |
9582 | R_PPC_ADDR16_LO); |
9583 | rela.r_addend = got_offset; | |
49c09209 | 9584 | bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc); |
9d8504b1 PB |
9585 | loc += sizeof (Elf32_External_Rela); |
9586 | ||
9587 | /* Provide a relocation for the GOT entry corresponding to this | |
9588 | PLT slot. Point it at the middle of the .plt entry. */ | |
ce558b89 AM |
9589 | rela.r_offset = (htab->elf.sgotplt->output_section->vma |
9590 | + htab->elf.sgotplt->output_offset | |
9d8504b1 | 9591 | + got_offset); |
7325306f | 9592 | rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, |
9d8504b1 PB |
9593 | R_PPC_ADDR32); |
9594 | rela.r_addend = ent->plt.offset + 16; | |
49c09209 | 9595 | bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc); |
9d8504b1 PB |
9596 | } |
9597 | ||
9598 | /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. | |
9599 | In particular, the offset for the relocation is not the | |
9600 | address of the PLT entry for this function, as specified | |
9601 | by the ABI. Instead, the offset is set to the address of | |
9602 | the GOT slot for this function. See EABI 4.4.4.1. */ | |
ce558b89 AM |
9603 | rela.r_offset = (htab->elf.sgotplt->output_section->vma |
9604 | + htab->elf.sgotplt->output_offset | |
9d8504b1 | 9605 | + got_offset); |
2d7ad24e | 9606 | rela.r_addend = 0; |
a6aa5195 AM |
9607 | } |
9608 | else | |
9609 | { | |
2d7ad24e | 9610 | rela.r_addend = 0; |
30845f11 | 9611 | if (!dyn) |
2d7ad24e AM |
9612 | { |
9613 | if (h->type == STT_GNU_IFUNC) | |
9614 | { | |
9615 | plt = htab->elf.iplt; | |
9616 | relplt = htab->elf.irelplt; | |
9617 | } | |
9618 | else | |
9619 | { | |
9620 | plt = htab->pltlocal; | |
9621 | relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL; | |
9622 | } | |
9623 | if (h->def_regular | |
9624 | && (h->root.type == bfd_link_hash_defined | |
9625 | || h->root.type == bfd_link_hash_defweak)) | |
9626 | rela.r_addend = SYM_VAL (h); | |
9627 | } | |
e054468f | 9628 | |
2d7ad24e | 9629 | if (relplt == NULL) |
9d8504b1 | 9630 | { |
2d7ad24e AM |
9631 | loc = plt->contents + ent->plt.offset; |
9632 | bfd_put_32 (info->output_bfd, rela.r_addend, loc); | |
9d8504b1 PB |
9633 | } |
9634 | else | |
9635 | { | |
2d7ad24e AM |
9636 | rela.r_offset = (plt->output_section->vma |
9637 | + plt->output_offset | |
9638 | + ent->plt.offset); | |
9639 | ||
30845f11 | 9640 | if (htab->plt_type == PLT_OLD || !dyn) |
2d7ad24e AM |
9641 | { |
9642 | /* We don't need to fill in the .plt. The ppc dynamic | |
9643 | linker will fill it in. */ | |
9644 | } | |
9645 | else | |
9646 | { | |
9647 | bfd_vma val = (htab->glink_pltresolve + ent->plt.offset | |
9648 | + htab->glink->output_section->vma | |
9649 | + htab->glink->output_offset); | |
9650 | bfd_put_32 (info->output_bfd, val, | |
9651 | plt->contents + ent->plt.offset); | |
9652 | } | |
9d8504b1 | 9653 | } |
a6aa5195 | 9654 | } |
e1a9cb8e | 9655 | |
2d7ad24e | 9656 | if (relplt != NULL) |
e054468f | 9657 | { |
2d7ad24e | 9658 | /* Fill in the entry in the .rela.plt section. */ |
30845f11 | 9659 | if (!dyn) |
2d7ad24e AM |
9660 | { |
9661 | if (h->type == STT_GNU_IFUNC) | |
9662 | rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); | |
9663 | else | |
9664 | rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); | |
9665 | loc = relplt->contents + (relplt->reloc_count++ | |
9666 | * sizeof (Elf32_External_Rela)); | |
9667 | htab->local_ifunc_resolver = 1; | |
9668 | } | |
9669 | else | |
9670 | { | |
9671 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); | |
9672 | loc = relplt->contents + (reloc_index | |
9673 | * sizeof (Elf32_External_Rela)); | |
9674 | if (h->type == STT_GNU_IFUNC && is_static_defined (h)) | |
9675 | htab->maybe_local_ifunc_resolver = 1; | |
9676 | } | |
9677 | bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc); | |
82e66161 | 9678 | } |
0a1b45a2 | 9679 | doneone = true; |
a6aa5195 | 9680 | } |
e1a9cb8e | 9681 | |
30845f11 | 9682 | if (htab->plt_type == PLT_NEW || !dyn) |
a6aa5195 | 9683 | { |
a7f2871e | 9684 | unsigned char *p; |
49c09209 | 9685 | asection *plt = htab->elf.splt; |
9e390558 | 9686 | |
30845f11 | 9687 | if (!dyn) |
2d7ad24e AM |
9688 | { |
9689 | if (h->type == STT_GNU_IFUNC) | |
9690 | plt = htab->elf.iplt; | |
9691 | else | |
9692 | break; | |
9693 | } | |
e1a9cb8e | 9694 | |
a7f2871e | 9695 | p = (unsigned char *) htab->glink->contents + ent->glink_offset; |
49c09209 | 9696 | write_glink_stub (h, ent, plt, p, info); |
e1a9cb8e | 9697 | |
0e1862bb | 9698 | if (!bfd_link_pic (info)) |
e054468f AM |
9699 | /* We only need one non-PIC glink stub. */ |
9700 | break; | |
a6aa5195 AM |
9701 | } |
9702 | else | |
9703 | break; | |
9704 | } | |
0a1b45a2 | 9705 | return true; |
49c09209 AM |
9706 | } |
9707 | ||
9708 | /* Finish up PLT handling. */ | |
9709 | ||
0a1b45a2 | 9710 | bool |
49c09209 AM |
9711 | ppc_finish_symbols (struct bfd_link_info *info) |
9712 | { | |
9713 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); | |
9714 | bfd *ibfd; | |
9715 | ||
9716 | if (!htab) | |
0a1b45a2 | 9717 | return true; |
49c09209 AM |
9718 | |
9719 | elf_link_hash_traverse (&htab->elf, write_global_sym_plt, info); | |
9720 | ||
9721 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
9722 | { | |
9723 | bfd_vma *local_got, *end_local_got; | |
9724 | struct plt_entry **local_plt, **lplt, **end_local_plt; | |
9725 | Elf_Internal_Shdr *symtab_hdr; | |
9726 | bfd_size_type locsymcount; | |
9727 | Elf_Internal_Sym *local_syms = NULL; | |
9728 | struct plt_entry *ent; | |
9729 | ||
9730 | if (!is_ppc_elf (ibfd)) | |
9731 | continue; | |
9732 | ||
9733 | local_got = elf_local_got_offsets (ibfd); | |
9734 | if (!local_got) | |
9735 | continue; | |
9736 | ||
9737 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
9738 | locsymcount = symtab_hdr->sh_info; | |
9739 | end_local_got = local_got + locsymcount; | |
9740 | local_plt = (struct plt_entry **) end_local_got; | |
9741 | end_local_plt = local_plt + locsymcount; | |
9742 | for (lplt = local_plt; lplt < end_local_plt; ++lplt) | |
9743 | for (ent = *lplt; ent != NULL; ent = ent->next) | |
9744 | { | |
9745 | if (ent->plt.offset != (bfd_vma) -1) | |
9746 | { | |
9747 | Elf_Internal_Sym *sym; | |
9748 | asection *sym_sec; | |
9749 | asection *plt, *relplt; | |
9750 | bfd_byte *loc; | |
9751 | bfd_vma val; | |
9752 | Elf_Internal_Rela rela; | |
8cd1fe1b | 9753 | unsigned char *p; |
49c09209 AM |
9754 | |
9755 | if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms, | |
9756 | lplt - local_plt, ibfd)) | |
9757 | { | |
c9594989 | 9758 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
49c09209 | 9759 | free (local_syms); |
0a1b45a2 | 9760 | return false; |
49c09209 AM |
9761 | } |
9762 | ||
9763 | val = sym->st_value; | |
9764 | if (sym_sec != NULL && sym_sec->output_section != NULL) | |
9765 | val += sym_sec->output_offset + sym_sec->output_section->vma; | |
9766 | ||
2d7ad24e AM |
9767 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
9768 | { | |
9769 | htab->local_ifunc_resolver = 1; | |
9770 | plt = htab->elf.iplt; | |
9771 | relplt = htab->elf.irelplt; | |
9772 | rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); | |
9773 | } | |
9774 | else | |
9775 | { | |
9776 | plt = htab->pltlocal; | |
9777 | if (bfd_link_pic (info)) | |
9778 | { | |
9779 | relplt = htab->relpltlocal; | |
9780 | rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); | |
9781 | } | |
9782 | else | |
9783 | { | |
9784 | loc = plt->contents + ent->plt.offset; | |
9785 | bfd_put_32 (info->output_bfd, val, loc); | |
9786 | continue; | |
9787 | } | |
9788 | } | |
49c09209 AM |
9789 | |
9790 | rela.r_offset = (ent->plt.offset | |
9791 | + plt->output_offset | |
9792 | + plt->output_section->vma); | |
49c09209 AM |
9793 | rela.r_addend = val; |
9794 | loc = relplt->contents + (relplt->reloc_count++ | |
9795 | * sizeof (Elf32_External_Rela)); | |
9796 | bfd_elf32_swap_reloca_out (info->output_bfd, &rela, loc); | |
49c09209 | 9797 | |
8cd1fe1b | 9798 | p = (unsigned char *) htab->glink->contents + ent->glink_offset; |
49c09209 | 9799 | write_glink_stub (NULL, ent, htab->elf.iplt, p, info); |
49c09209 AM |
9800 | } |
9801 | } | |
9802 | ||
9803 | if (local_syms != NULL | |
9804 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
9805 | { | |
9806 | if (!info->keep_memory) | |
9807 | free (local_syms); | |
9808 | else | |
9809 | symtab_hdr->contents = (unsigned char *) local_syms; | |
9810 | } | |
9811 | } | |
0a1b45a2 | 9812 | return true; |
49c09209 AM |
9813 | } |
9814 | ||
9815 | /* Finish up dynamic symbol handling. We set the contents of various | |
9816 | dynamic sections here. */ | |
9817 | ||
0a1b45a2 | 9818 | static bool |
49c09209 AM |
9819 | ppc_elf_finish_dynamic_symbol (bfd *output_bfd, |
9820 | struct bfd_link_info *info, | |
9821 | struct elf_link_hash_entry *h, | |
9822 | Elf_Internal_Sym *sym) | |
9823 | { | |
9824 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); | |
9825 | struct plt_entry *ent; | |
9826 | ||
9827 | #ifdef DEBUG | |
9828 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", | |
9829 | h->root.root.string); | |
9830 | #endif | |
9831 | ||
9832 | if (!h->def_regular | |
9833 | || (h->type == STT_GNU_IFUNC && !bfd_link_pic (info))) | |
9834 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) | |
9835 | if (ent->plt.offset != (bfd_vma) -1) | |
9836 | { | |
9837 | if (!h->def_regular) | |
9838 | { | |
9839 | /* Mark the symbol as undefined, rather than as | |
9840 | defined in the .plt section. Leave the value if | |
9841 | there were any relocations where pointer equality | |
9842 | matters (this is a clue for the dynamic linker, to | |
9843 | make function pointer comparisons work between an | |
9844 | application and shared library), otherwise set it | |
9845 | to zero. */ | |
9846 | sym->st_shndx = SHN_UNDEF; | |
9847 | if (!h->pointer_equality_needed) | |
9848 | sym->st_value = 0; | |
9849 | else if (!h->ref_regular_nonweak) | |
9850 | { | |
9851 | /* This breaks function pointer comparisons, but | |
9852 | that is better than breaking tests for a NULL | |
9853 | function pointer. */ | |
9854 | sym->st_value = 0; | |
9855 | } | |
9856 | } | |
9857 | else | |
9858 | { | |
9859 | /* Set the value of ifunc symbols in a non-pie | |
9860 | executable to the glink entry. This is to avoid | |
9861 | text relocations. We can't do this for ifunc in | |
9862 | allocate_dynrelocs, as we do for normal dynamic | |
9863 | function symbols with plt entries, because we need | |
9864 | to keep the original value around for the ifunc | |
9865 | relocation. */ | |
9866 | sym->st_shndx | |
9867 | = (_bfd_elf_section_from_bfd_section | |
9868 | (info->output_bfd, htab->glink->output_section)); | |
9869 | sym->st_value = (ent->glink_offset | |
9870 | + htab->glink->output_offset | |
9871 | + htab->glink->output_section->vma); | |
9872 | } | |
9873 | break; | |
9874 | } | |
e1a9cb8e | 9875 | |
25dbc73a AM |
9876 | if (h->needs_copy) |
9877 | { | |
9878 | asection *s; | |
9879 | Elf_Internal_Rela rela; | |
9880 | bfd_byte *loc; | |
e1a9cb8e | 9881 | |
25dbc73a | 9882 | /* This symbols needs a copy reloc. Set it up. */ |
e1a9cb8e | 9883 | |
25dbc73a AM |
9884 | #ifdef DEBUG |
9885 | fprintf (stderr, ", copy"); | |
9886 | #endif | |
e1a9cb8e | 9887 | |
25dbc73a | 9888 | BFD_ASSERT (h->dynindx != -1); |
86bbe32f | 9889 | |
4dc4a9a5 | 9890 | if (ppc_elf_hash_entry (h)->has_sda_refs) |
25dbc73a | 9891 | s = htab->relsbss; |
afbf7e8e | 9892 | else if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f | 9893 | s = htab->elf.sreldynrelro; |
25dbc73a | 9894 | else |
9d19e4fd | 9895 | s = htab->elf.srelbss; |
25dbc73a | 9896 | BFD_ASSERT (s != NULL); |
e1a9cb8e | 9897 | |
e87d4038 | 9898 | rela.r_offset = SYM_VAL (h); |
25dbc73a AM |
9899 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
9900 | rela.r_addend = 0; | |
9901 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); | |
9902 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
9903 | } | |
e1a9cb8e | 9904 | |
25dbc73a AM |
9905 | #ifdef DEBUG |
9906 | fprintf (stderr, "\n"); | |
9907 | #endif | |
e1a9cb8e | 9908 | |
0a1b45a2 | 9909 | return true; |
25dbc73a AM |
9910 | } |
9911 | \f | |
9912 | static enum elf_reloc_type_class | |
7e612e98 AM |
9913 | ppc_elf_reloc_type_class (const struct bfd_link_info *info, |
9914 | const asection *rel_sec, | |
9915 | const Elf_Internal_Rela *rela) | |
e1a9cb8e | 9916 | { |
7e612e98 AM |
9917 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
9918 | ||
ce558b89 | 9919 | if (rel_sec == htab->elf.irelplt) |
7e612e98 AM |
9920 | return reloc_class_ifunc; |
9921 | ||
25dbc73a AM |
9922 | switch (ELF32_R_TYPE (rela->r_info)) |
9923 | { | |
9924 | case R_PPC_RELATIVE: | |
9925 | return reloc_class_relative; | |
25dbc73a AM |
9926 | case R_PPC_JMP_SLOT: |
9927 | return reloc_class_plt; | |
9928 | case R_PPC_COPY: | |
9929 | return reloc_class_copy; | |
9930 | default: | |
9931 | return reloc_class_normal; | |
9932 | } | |
e1a9cb8e | 9933 | } |
25dbc73a AM |
9934 | \f |
9935 | /* Finish up the dynamic sections. */ | |
e1a9cb8e | 9936 | |
0a1b45a2 | 9937 | static bool |
25dbc73a AM |
9938 | ppc_elf_finish_dynamic_sections (bfd *output_bfd, |
9939 | struct bfd_link_info *info) | |
e1a9cb8e | 9940 | { |
25dbc73a AM |
9941 | asection *sdyn; |
9942 | struct ppc_elf_link_hash_table *htab; | |
1fe44d79 | 9943 | bfd_vma got; |
e87d4038 | 9944 | bfd *dynobj; |
0a1b45a2 | 9945 | bool ret = true; |
e1a9cb8e | 9946 | |
25dbc73a AM |
9947 | #ifdef DEBUG |
9948 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); | |
9949 | #endif | |
6b0817e5 | 9950 | |
25dbc73a | 9951 | htab = ppc_elf_hash_table (info); |
ce558b89 | 9952 | dynobj = htab->elf.dynobj; |
3d4d4302 | 9953 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
e1a9cb8e | 9954 | |
1fe44d79 AM |
9955 | got = 0; |
9956 | if (htab->elf.hgot != NULL) | |
e87d4038 | 9957 | got = SYM_VAL (htab->elf.hgot); |
1fe44d79 | 9958 | |
25dbc73a | 9959 | if (htab->elf.dynamic_sections_created) |
e1a9cb8e | 9960 | { |
25dbc73a | 9961 | Elf32_External_Dyn *dyncon, *dynconend; |
e1a9cb8e | 9962 | |
ce558b89 | 9963 | BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL); |
86bbe32f | 9964 | |
25dbc73a AM |
9965 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
9966 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); | |
9967 | for (; dyncon < dynconend; dyncon++) | |
9968 | { | |
9969 | Elf_Internal_Dyn dyn; | |
9970 | asection *s; | |
e1a9cb8e | 9971 | |
9d8504b1 | 9972 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
86bbe32f | 9973 | |
25dbc73a AM |
9974 | switch (dyn.d_tag) |
9975 | { | |
9976 | case DT_PLTGOT: | |
90c14f0c | 9977 | if (htab->elf.target_os == is_vxworks) |
ce558b89 | 9978 | s = htab->elf.sgotplt; |
9d8504b1 | 9979 | else |
ce558b89 | 9980 | s = htab->elf.splt; |
25dbc73a AM |
9981 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
9982 | break; | |
86bbe32f | 9983 | |
25dbc73a | 9984 | case DT_PLTRELSZ: |
ce558b89 | 9985 | dyn.d_un.d_val = htab->elf.srelplt->size; |
25dbc73a | 9986 | break; |
e1a9cb8e | 9987 | |
25dbc73a | 9988 | case DT_JMPREL: |
ce558b89 | 9989 | s = htab->elf.srelplt; |
25dbc73a AM |
9990 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
9991 | break; | |
2f89ff8d | 9992 | |
1fe44d79 AM |
9993 | case DT_PPC_GOT: |
9994 | dyn.d_un.d_ptr = got; | |
d7128ce4 AM |
9995 | break; |
9996 | ||
82e66161 AM |
9997 | case DT_TEXTREL: |
9998 | if (htab->local_ifunc_resolver) | |
9999 | info->callbacks->einfo | |
10000 | (_("%X%P: text relocations and GNU indirect " | |
10001 | "functions will result in a segfault at runtime\n")); | |
10002 | else if (htab->maybe_local_ifunc_resolver) | |
10003 | info->callbacks->einfo | |
10004 | (_("%P: warning: text relocations and GNU indirect " | |
10005 | "functions may result in a segfault at runtime\n")); | |
10006 | continue; | |
10007 | ||
25dbc73a | 10008 | default: |
90c14f0c | 10009 | if (htab->elf.target_os == is_vxworks |
7a2b07ff NS |
10010 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
10011 | break; | |
25dbc73a AM |
10012 | continue; |
10013 | } | |
4c45e5c9 | 10014 | |
25dbc73a AM |
10015 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
10016 | } | |
10017 | } | |
4c45e5c9 | 10018 | |
6528b6eb AM |
10019 | if (htab->elf.sgot != NULL |
10020 | && htab->elf.sgot->output_section != bfd_abs_section_ptr) | |
25dbc73a | 10021 | { |
ce558b89 AM |
10022 | if (htab->elf.hgot->root.u.def.section == htab->elf.sgot |
10023 | || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt) | |
e87d4038 | 10024 | { |
e79f5955 | 10025 | unsigned char *p = htab->elf.hgot->root.u.def.section->contents; |
2f89ff8d | 10026 | |
e87d4038 AM |
10027 | p += htab->elf.hgot->root.u.def.value; |
10028 | if (htab->plt_type == PLT_OLD) | |
e79f5955 AM |
10029 | { |
10030 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 | |
10031 | so that a function can easily find the address of | |
10032 | _GLOBAL_OFFSET_TABLE_. */ | |
10033 | BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 | |
10034 | < htab->elf.hgot->root.u.def.section->size); | |
10035 | bfd_put_32 (output_bfd, 0x4e800021, p - 4); | |
10036 | } | |
3b36f7e6 | 10037 | |
e87d4038 | 10038 | if (sdyn != NULL) |
e79f5955 AM |
10039 | { |
10040 | bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; | |
10041 | BFD_ASSERT (htab->elf.hgot->root.u.def.value | |
10042 | < htab->elf.hgot->root.u.def.section->size); | |
10043 | bfd_put_32 (output_bfd, val, p); | |
10044 | } | |
e87d4038 AM |
10045 | } |
10046 | else | |
10047 | { | |
695344c0 | 10048 | /* xgettext:c-format */ |
cf97bcb0 AM |
10049 | _bfd_error_handler (_("%s not defined in linker created %pA"), |
10050 | htab->elf.hgot->root.root.string, | |
10051 | (htab->elf.sgotplt != NULL | |
10052 | ? htab->elf.sgotplt : htab->elf.sgot)); | |
e87d4038 | 10053 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 10054 | ret = false; |
e87d4038 | 10055 | } |
25dbc73a | 10056 | |
ce558b89 | 10057 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; |
25dbc73a AM |
10058 | } |
10059 | ||
9d8504b1 | 10060 | /* Fill in the first entry in the VxWorks procedure linkage table. */ |
90c14f0c | 10061 | if (htab->elf.target_os == is_vxworks |
6528b6eb AM |
10062 | && htab->elf.splt != NULL |
10063 | && htab->elf.splt->size != 0 | |
10064 | && htab->elf.splt->output_section != bfd_abs_section_ptr) | |
9d8504b1 | 10065 | { |
6528b6eb | 10066 | asection *splt = htab->elf.splt; |
9d8504b1 | 10067 | /* Use the right PLT. */ |
0e1862bb | 10068 | const bfd_vma *plt_entry = (bfd_link_pic (info) |
5b914448 AM |
10069 | ? ppc_elf_vxworks_pic_plt0_entry |
10070 | : ppc_elf_vxworks_plt0_entry); | |
9d8504b1 | 10071 | |
0e1862bb | 10072 | if (!bfd_link_pic (info)) |
9d8504b1 | 10073 | { |
e87d4038 | 10074 | bfd_vma got_value = SYM_VAL (htab->elf.hgot); |
9d8504b1 | 10075 | |
e87d4038 | 10076 | bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), |
9d8504b1 | 10077 | splt->contents + 0); |
e87d4038 | 10078 | bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), |
9d8504b1 PB |
10079 | splt->contents + 4); |
10080 | } | |
10081 | else | |
10082 | { | |
10083 | bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); | |
10084 | bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); | |
10085 | } | |
10086 | bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); | |
10087 | bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); | |
10088 | bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); | |
10089 | bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); | |
10090 | bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); | |
10091 | bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); | |
10092 | ||
0e1862bb | 10093 | if (! bfd_link_pic (info)) |
9d8504b1 PB |
10094 | { |
10095 | Elf_Internal_Rela rela; | |
10096 | bfd_byte *loc; | |
10097 | ||
10098 | loc = htab->srelplt2->contents; | |
10099 | ||
10100 | /* Output the @ha relocation for the first instruction. */ | |
ce558b89 AM |
10101 | rela.r_offset = (htab->elf.splt->output_section->vma |
10102 | + htab->elf.splt->output_offset | |
9d8504b1 | 10103 | + 2); |
636ce3f5 | 10104 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); |
9d8504b1 PB |
10105 | rela.r_addend = 0; |
10106 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
10107 | loc += sizeof (Elf32_External_Rela); | |
5b914448 | 10108 | |
9d8504b1 | 10109 | /* Output the @l relocation for the second instruction. */ |
ce558b89 AM |
10110 | rela.r_offset = (htab->elf.splt->output_section->vma |
10111 | + htab->elf.splt->output_offset | |
9d8504b1 | 10112 | + 6); |
636ce3f5 | 10113 | rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); |
9d8504b1 PB |
10114 | rela.r_addend = 0; |
10115 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
10116 | loc += sizeof (Elf32_External_Rela); | |
10117 | ||
10118 | /* Fix up the remaining relocations. They may have the wrong | |
10119 | symbol index for _G_O_T_ or _P_L_T_ depending on the order | |
10120 | in which symbols were output. */ | |
10121 | while (loc < htab->srelplt2->contents + htab->srelplt2->size) | |
10122 | { | |
10123 | Elf_Internal_Rela rel; | |
10124 | ||
10125 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); | |
636ce3f5 | 10126 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); |
9d8504b1 PB |
10127 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
10128 | loc += sizeof (Elf32_External_Rela); | |
10129 | ||
10130 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); | |
636ce3f5 | 10131 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); |
9d8504b1 PB |
10132 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
10133 | loc += sizeof (Elf32_External_Rela); | |
10134 | ||
10135 | bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); | |
7325306f | 10136 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); |
9d8504b1 PB |
10137 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
10138 | loc += sizeof (Elf32_External_Rela); | |
10139 | } | |
10140 | } | |
10141 | } | |
10142 | ||
e054468f AM |
10143 | if (htab->glink != NULL |
10144 | && htab->glink->contents != NULL | |
10145 | && htab->elf.dynamic_sections_created) | |
d7128ce4 AM |
10146 | { |
10147 | unsigned char *p; | |
10148 | unsigned char *endp; | |
a6aa5195 | 10149 | bfd_vma res0; |
a6aa5195 AM |
10150 | |
10151 | /* | |
10152 | * PIC glink code is the following: | |
10153 | * | |
10154 | * # ith PLT code stub. | |
10155 | * addis 11,30,(plt+(i-1)*4-got)@ha | |
10156 | * lwz 11,(plt+(i-1)*4-got)@l(11) | |
10157 | * mtctr 11 | |
10158 | * bctr | |
10159 | * | |
10160 | * # A table of branches, one for each plt entry. | |
176a0d42 | 10161 | * # The idea is that the plt call stub loads ctr and r11 with these |
a6aa5195 AM |
10162 | * # addresses, so (r11 - res_0) gives the plt index * 4. |
10163 | * res_0: b PLTresolve | |
10164 | * res_1: b PLTresolve | |
10165 | * . | |
10166 | * # Some number of entries towards the end can be nops | |
10167 | * res_n_m3: nop | |
10168 | * res_n_m2: nop | |
10169 | * res_n_m1: | |
10170 | * | |
10171 | * PLTresolve: | |
10172 | * addis 11,11,(1f-res_0)@ha | |
10173 | * mflr 0 | |
10174 | * bcl 20,31,1f | |
10175 | * 1: addi 11,11,(1b-res_0)@l | |
10176 | * mflr 12 | |
10177 | * mtlr 0 | |
07d6d2b8 | 10178 | * sub 11,11,12 # r11 = index * 4 |
a6aa5195 | 10179 | * addis 12,12,(got+4-1b)@ha |
07d6d2b8 AM |
10180 | * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve |
10181 | * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address | |
a6aa5195 AM |
10182 | * mtctr 0 |
10183 | * add 0,11,11 | |
07d6d2b8 | 10184 | * add 11,0,11 # r11 = index * 12 = reloc offset. |
a6aa5195 | 10185 | * bctr |
9e390558 | 10186 | * |
176a0d42 AM |
10187 | * Non-PIC glink code is a little simpler. |
10188 | * | |
10189 | * # ith PLT code stub. | |
10190 | * lis 11,(plt+(i-1)*4)@ha | |
10191 | * lwz 11,(plt+(i-1)*4)@l(11) | |
10192 | * mtctr 11 | |
10193 | * bctr | |
10194 | * | |
10195 | * The branch table is the same, then comes | |
10196 | * | |
10197 | * PLTresolve: | |
10198 | * lis 12,(got+4)@ha | |
10199 | * addis 11,11,(-res_0)@ha | |
07d6d2b8 AM |
10200 | * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve |
10201 | * addi 11,11,(-res_0)@l # r11 = index * 4 | |
176a0d42 AM |
10202 | * mtctr 0 |
10203 | * add 0,11,11 | |
07d6d2b8 AM |
10204 | * lwz 12,(got+8)@l(12) # got[2] contains the map address |
10205 | * add 11,0,11 # r11 = index * 12 = reloc offset. | |
176a0d42 AM |
10206 | * bctr |
10207 | */ | |
7e8aeb9a | 10208 | |
a6aa5195 | 10209 | /* Build the branch table, one for each plt entry (less one), |
86b9da88 | 10210 | and perhaps some padding. */ |
a6aa5195 AM |
10211 | p = htab->glink->contents; |
10212 | p += htab->glink_pltresolve; | |
86b9da88 AM |
10213 | endp = htab->glink->contents; |
10214 | endp += htab->glink->size - GLINK_PLTRESOLVE; | |
da3a2088 | 10215 | while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4)) |
86b9da88 AM |
10216 | { |
10217 | bfd_put_32 (output_bfd, B + endp - p, p); | |
10218 | p += 4; | |
10219 | } | |
10220 | while (p < endp) | |
10221 | { | |
10222 | bfd_put_32 (output_bfd, NOP, p); | |
10223 | p += 4; | |
10224 | } | |
10225 | ||
7e8aeb9a | 10226 | res0 = (htab->glink_pltresolve |
86b9da88 AM |
10227 | + htab->glink->output_section->vma |
10228 | + htab->glink->output_offset); | |
10229 | ||
da3a2088 AM |
10230 | if (htab->params->ppc476_workaround) |
10231 | { | |
10232 | /* Ensure that a call stub at the end of a page doesn't | |
10233 | result in prefetch over the end of the page into the | |
10234 | glink branch table. */ | |
10235 | bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; | |
10236 | bfd_vma page_addr; | |
10237 | bfd_vma glink_start = (htab->glink->output_section->vma | |
10238 | + htab->glink->output_offset); | |
10239 | ||
10240 | for (page_addr = res0 & -pagesize; | |
10241 | page_addr > glink_start; | |
10242 | page_addr -= pagesize) | |
10243 | { | |
10244 | /* We have a plt call stub that may need fixing. */ | |
10245 | bfd_byte *loc; | |
10246 | unsigned int insn; | |
10247 | ||
10248 | loc = htab->glink->contents + page_addr - 4 - glink_start; | |
10249 | insn = bfd_get_32 (output_bfd, loc); | |
10250 | if (insn == BCTR) | |
10251 | { | |
10252 | /* By alignment, we know that there must be at least | |
10253 | one other call stub before this one. */ | |
10254 | insn = bfd_get_32 (output_bfd, loc - 16); | |
10255 | if (insn == BCTR) | |
10256 | bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc); | |
10257 | else | |
10258 | bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc); | |
10259 | } | |
10260 | } | |
10261 | } | |
10262 | ||
86b9da88 | 10263 | /* Last comes the PLTresolve stub. */ |
9e390558 | 10264 | endp = p + GLINK_PLTRESOLVE; |
0e1862bb | 10265 | if (bfd_link_pic (info)) |
7e8aeb9a | 10266 | { |
a6aa5195 | 10267 | bfd_vma bcl; |
d7128ce4 | 10268 | |
a6aa5195 AM |
10269 | bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 |
10270 | + htab->glink->output_section->vma | |
10271 | + htab->glink->output_offset); | |
10272 | ||
9e390558 AM |
10273 | bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (bcl - res0), p); |
10274 | p += 4; | |
10275 | bfd_put_32 (output_bfd, MFLR_0, p); | |
10276 | p += 4; | |
10277 | bfd_put_32 (output_bfd, BCL_20_31, p); | |
10278 | p += 4; | |
10279 | bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (bcl - res0), p); | |
10280 | p += 4; | |
10281 | bfd_put_32 (output_bfd, MFLR_12, p); | |
10282 | p += 4; | |
10283 | bfd_put_32 (output_bfd, MTLR_0, p); | |
10284 | p += 4; | |
10285 | bfd_put_32 (output_bfd, SUB_11_11_12, p); | |
10286 | p += 4; | |
10287 | bfd_put_32 (output_bfd, ADDIS_12_12 + PPC_HA (got + 4 - bcl), p); | |
10288 | p += 4; | |
a6aa5195 AM |
10289 | if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) |
10290 | { | |
9e390558 AM |
10291 | bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4 - bcl), p); |
10292 | p += 4; | |
10293 | bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8 - bcl), p); | |
10294 | p += 4; | |
a6aa5195 AM |
10295 | } |
10296 | else | |
10297 | { | |
9e390558 AM |
10298 | bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4 - bcl), p); |
10299 | p += 4; | |
10300 | bfd_put_32 (output_bfd, LWZ_12_12 + 4, p); | |
10301 | p += 4; | |
a6aa5195 | 10302 | } |
9e390558 AM |
10303 | bfd_put_32 (output_bfd, MTCTR_0, p); |
10304 | p += 4; | |
10305 | bfd_put_32 (output_bfd, ADD_0_11_11, p); | |
7e8aeb9a AM |
10306 | } |
10307 | else | |
d7128ce4 | 10308 | { |
9e390558 AM |
10309 | bfd_put_32 (output_bfd, LIS_12 + PPC_HA (got + 4), p); |
10310 | p += 4; | |
10311 | bfd_put_32 (output_bfd, ADDIS_11_11 + PPC_HA (-res0), p); | |
10312 | p += 4; | |
a6aa5195 | 10313 | if (PPC_HA (got + 4) == PPC_HA (got + 8)) |
9e390558 | 10314 | bfd_put_32 (output_bfd, LWZ_0_12 + PPC_LO (got + 4), p); |
a6aa5195 | 10315 | else |
9e390558 AM |
10316 | bfd_put_32 (output_bfd, LWZU_0_12 + PPC_LO (got + 4), p); |
10317 | p += 4; | |
10318 | bfd_put_32 (output_bfd, ADDI_11_11 + PPC_LO (-res0), p); | |
10319 | p += 4; | |
10320 | bfd_put_32 (output_bfd, MTCTR_0, p); | |
10321 | p += 4; | |
10322 | bfd_put_32 (output_bfd, ADD_0_11_11, p); | |
10323 | p += 4; | |
10324 | if (PPC_HA (got + 4) == PPC_HA (got + 8)) | |
10325 | bfd_put_32 (output_bfd, LWZ_12_12 + PPC_LO (got + 8), p); | |
10326 | else | |
10327 | bfd_put_32 (output_bfd, LWZ_12_12 + 4, p); | |
10328 | } | |
10329 | p += 4; | |
10330 | bfd_put_32 (output_bfd, ADD_11_0_11, p); | |
10331 | p += 4; | |
407aa07c AM |
10332 | bfd_put_32 (output_bfd, BCTR, p); |
10333 | p += 4; | |
9e390558 AM |
10334 | while (p < endp) |
10335 | { | |
10336 | bfd_put_32 (output_bfd, | |
10337 | htab->params->ppc476_workaround ? BA : NOP, p); | |
10338 | p += 4; | |
d7128ce4 | 10339 | } |
9e390558 | 10340 | BFD_ASSERT (p == endp); |
d7128ce4 AM |
10341 | } |
10342 | ||
6177242a AM |
10343 | if (htab->glink_eh_frame != NULL |
10344 | && htab->glink_eh_frame->contents != NULL) | |
10345 | { | |
10346 | unsigned char *p = htab->glink_eh_frame->contents; | |
10347 | bfd_vma val; | |
10348 | ||
6177242a AM |
10349 | p += sizeof (glink_eh_frame_cie); |
10350 | /* FDE length. */ | |
6177242a AM |
10351 | p += 4; |
10352 | /* CIE pointer. */ | |
6177242a AM |
10353 | p += 4; |
10354 | /* Offset to .glink. */ | |
10355 | val = (htab->glink->output_section->vma | |
10356 | + htab->glink->output_offset); | |
10357 | val -= (htab->glink_eh_frame->output_section->vma | |
10358 | + htab->glink_eh_frame->output_offset); | |
10359 | val -= p - htab->glink_eh_frame->contents; | |
10360 | bfd_put_32 (htab->elf.dynobj, val, p); | |
6177242a | 10361 | |
dbaa2011 | 10362 | if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME |
6177242a AM |
10363 | && !_bfd_elf_write_section_eh_frame (output_bfd, info, |
10364 | htab->glink_eh_frame, | |
10365 | htab->glink_eh_frame->contents)) | |
0a1b45a2 | 10366 | return false; |
6177242a AM |
10367 | } |
10368 | ||
e87d4038 | 10369 | return ret; |
25dbc73a | 10370 | } |
e1a9cb8e | 10371 | \f |
6d00b590 | 10372 | #define TARGET_LITTLE_SYM powerpc_elf32_le_vec |
252b5132 | 10373 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
6d00b590 | 10374 | #define TARGET_BIG_SYM powerpc_elf32_vec |
252b5132 RH |
10375 | #define TARGET_BIG_NAME "elf32-powerpc" |
10376 | #define ELF_ARCH bfd_arch_powerpc | |
ae95ffa6 | 10377 | #define ELF_TARGET_ID PPC32_ELF_DATA |
252b5132 RH |
10378 | #define ELF_MACHINE_CODE EM_PPC |
10379 | #define ELF_MAXPAGESIZE 0x10000 | |
702d1671 | 10380 | #define ELF_COMMONPAGESIZE 0x1000 |
252b5132 RH |
10381 | #define elf_info_to_howto ppc_elf_info_to_howto |
10382 | ||
10383 | #ifdef EM_CYGNUS_POWERPC | |
10384 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC | |
10385 | #endif | |
10386 | ||
10387 | #ifdef EM_PPC_OLD | |
10388 | #define ELF_MACHINE_ALT2 EM_PPC_OLD | |
10389 | #endif | |
10390 | ||
10391 | #define elf_backend_plt_not_loaded 1 | |
5474d94f | 10392 | #define elf_backend_want_dynrelro 1 |
252b5132 | 10393 | #define elf_backend_can_gc_sections 1 |
51b64d56 | 10394 | #define elf_backend_can_refcount 1 |
b491616a | 10395 | #define elf_backend_rela_normal 1 |
53291d1f | 10396 | #define elf_backend_caches_rawsize 1 |
252b5132 | 10397 | |
43c40ab2 | 10398 | #define bfd_elf32_mkobject ppc_elf_mkobject |
252b5132 | 10399 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
70bccea4 | 10400 | #define bfd_elf32_bfd_relax_section ppc_elf_relax_section |
252b5132 | 10401 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
b9c361e0 | 10402 | #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup |
252b5132 | 10403 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
70bccea4 | 10404 | #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create |
468392fb | 10405 | #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab |
252b5132 | 10406 | |
feee612b | 10407 | #define elf_backend_object_p ppc_elf_object_p |
252b5132 | 10408 | #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook |
252b5132 RH |
10409 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
10410 | #define elf_backend_relocate_section ppc_elf_relocate_section | |
10411 | #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections | |
10412 | #define elf_backend_check_relocs ppc_elf_check_relocs | |
c0e331c7 | 10413 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
7fce784e | 10414 | #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol |
252b5132 RH |
10415 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
10416 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook | |
10417 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections | |
0eb4a168 | 10418 | #define elf_backend_hash_symbol ppc_elf_hash_symbol |
252b5132 RH |
10419 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
10420 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections | |
10421 | #define elf_backend_fake_sections ppc_elf_fake_sections | |
10422 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers | |
954b63d4 | 10423 | #define elf_backend_modify_segment_map ppc_elf_modify_segment_map |
c5fccbec DJ |
10424 | #define elf_backend_grok_prstatus ppc_elf_grok_prstatus |
10425 | #define elf_backend_grok_psinfo ppc_elf_grok_psinfo | |
183e98be | 10426 | #define elf_backend_write_core_note ppc_elf_write_core_note |
29c2fb7c | 10427 | #define elf_backend_reloc_type_class ppc_elf_reloc_type_class |
70bccea4 AM |
10428 | #define elf_backend_begin_write_processing ppc_elf_begin_write_processing |
10429 | #define elf_backend_final_write_processing ppc_elf_final_write_processing | |
10430 | #define elf_backend_write_section ppc_elf_write_section | |
551b43fd | 10431 | #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr |
4c45e5c9 | 10432 | #define elf_backend_plt_sym_val ppc_elf_plt_sym_val |
8a696751 | 10433 | #define elf_backend_action_discarded ppc_elf_action_discarded |
74541ad4 | 10434 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
b9c361e0 | 10435 | #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags |
252b5132 RH |
10436 | |
10437 | #include "elf32-target.h" | |
9d8504b1 | 10438 | |
7b8e7dad AM |
10439 | /* FreeBSD Target */ |
10440 | ||
10441 | #undef TARGET_LITTLE_SYM | |
10442 | #undef TARGET_LITTLE_NAME | |
10443 | ||
10444 | #undef TARGET_BIG_SYM | |
6d00b590 | 10445 | #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec |
7b8e7dad AM |
10446 | #undef TARGET_BIG_NAME |
10447 | #define TARGET_BIG_NAME "elf32-powerpc-freebsd" | |
10448 | ||
10449 | #undef ELF_OSABI | |
10450 | #define ELF_OSABI ELFOSABI_FREEBSD | |
10451 | ||
10452 | #undef elf32_bed | |
10453 | #define elf32_bed elf32_powerpc_fbsd_bed | |
10454 | ||
10455 | #include "elf32-target.h" | |
10456 | ||
9d8504b1 PB |
10457 | /* VxWorks Target */ |
10458 | ||
10459 | #undef TARGET_LITTLE_SYM | |
10460 | #undef TARGET_LITTLE_NAME | |
10461 | ||
10462 | #undef TARGET_BIG_SYM | |
6d00b590 | 10463 | #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec |
9d8504b1 PB |
10464 | #undef TARGET_BIG_NAME |
10465 | #define TARGET_BIG_NAME "elf32-powerpc-vxworks" | |
10466 | ||
7b8e7dad AM |
10467 | #undef ELF_OSABI |
10468 | ||
90c14f0c L |
10469 | #undef ELF_TARGET_OS |
10470 | #define ELF_TARGET_OS is_vxworks | |
10471 | ||
d5e3d971 PB |
10472 | /* VxWorks uses the elf default section flags for .plt. */ |
10473 | static const struct bfd_elf_special_section * | |
4aef7643 | 10474 | ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec) |
9d8504b1 | 10475 | { |
d5e3d971 PB |
10476 | if (sec->name == NULL) |
10477 | return NULL; | |
10478 | ||
10479 | if (strcmp (sec->name, ".plt") == 0) | |
10480 | return _bfd_elf_get_sec_type_attr (abfd, sec); | |
10481 | ||
10482 | return ppc_elf_get_sec_type_attr (abfd, sec); | |
10483 | } | |
9d8504b1 PB |
10484 | |
10485 | /* Like ppc_elf_link_hash_table_create, but overrides | |
10486 | appropriately for VxWorks. */ | |
10487 | static struct bfd_link_hash_table * | |
10488 | ppc_elf_vxworks_link_hash_table_create (bfd *abfd) | |
10489 | { | |
10490 | struct bfd_link_hash_table *ret; | |
10491 | ||
10492 | ret = ppc_elf_link_hash_table_create (abfd); | |
10493 | if (ret) | |
10494 | { | |
10495 | struct ppc_elf_link_hash_table *htab | |
954b63d4 | 10496 | = (struct ppc_elf_link_hash_table *)ret; |
4a3dc543 | 10497 | htab->plt_type = PLT_VXWORKS; |
9d8504b1 PB |
10498 | htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; |
10499 | htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; | |
10500 | htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; | |
10501 | } | |
10502 | return ret; | |
10503 | } | |
10504 | ||
10505 | /* Tweak magic VxWorks symbols as they are loaded. */ | |
0a1b45a2 | 10506 | static bool |
9d8504b1 PB |
10507 | ppc_elf_vxworks_add_symbol_hook (bfd *abfd, |
10508 | struct bfd_link_info *info, | |
10509 | Elf_Internal_Sym *sym, | |
4aef7643 AM |
10510 | const char **namep, |
10511 | flagword *flagsp, | |
9d8504b1 PB |
10512 | asection **secp, |
10513 | bfd_vma *valp) | |
10514 | { | |
4aef7643 AM |
10515 | if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, |
10516 | valp)) | |
0a1b45a2 | 10517 | return false; |
9d8504b1 | 10518 | |
4aef7643 | 10519 | return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp); |
9d8504b1 PB |
10520 | } |
10521 | ||
0a1b45a2 | 10522 | static bool |
cc364be6 | 10523 | ppc_elf_vxworks_final_write_processing (bfd *abfd) |
9d8504b1 | 10524 | { |
cc364be6 AM |
10525 | ppc_final_write_processing (abfd); |
10526 | return elf_vxworks_final_write_processing (abfd); | |
9d8504b1 PB |
10527 | } |
10528 | ||
10529 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
10530 | define it. */ | |
10531 | #undef elf_backend_want_plt_sym | |
10532 | #define elf_backend_want_plt_sym 1 | |
10533 | #undef elf_backend_want_got_plt | |
10534 | #define elf_backend_want_got_plt 1 | |
10535 | #undef elf_backend_got_symbol_offset | |
10536 | #define elf_backend_got_symbol_offset 0 | |
10537 | #undef elf_backend_plt_not_loaded | |
10538 | #define elf_backend_plt_not_loaded 0 | |
10539 | #undef elf_backend_plt_readonly | |
10540 | #define elf_backend_plt_readonly 1 | |
10541 | #undef elf_backend_got_header_size | |
10542 | #define elf_backend_got_header_size 12 | |
64f52338 AM |
10543 | #undef elf_backend_dtrel_excludes_plt |
10544 | #define elf_backend_dtrel_excludes_plt 1 | |
9d8504b1 | 10545 | |
468392fb AM |
10546 | #undef bfd_elf32_get_synthetic_symtab |
10547 | ||
9d8504b1 PB |
10548 | #undef bfd_elf32_bfd_link_hash_table_create |
10549 | #define bfd_elf32_bfd_link_hash_table_create \ | |
10550 | ppc_elf_vxworks_link_hash_table_create | |
9d8504b1 PB |
10551 | #undef elf_backend_add_symbol_hook |
10552 | #define elf_backend_add_symbol_hook \ | |
10553 | ppc_elf_vxworks_add_symbol_hook | |
10554 | #undef elf_backend_link_output_symbol_hook | |
10555 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 10556 | elf_vxworks_link_output_symbol_hook |
9d8504b1 PB |
10557 | #undef elf_backend_final_write_processing |
10558 | #define elf_backend_final_write_processing \ | |
10559 | ppc_elf_vxworks_final_write_processing | |
d5e3d971 PB |
10560 | #undef elf_backend_get_sec_type_attr |
10561 | #define elf_backend_get_sec_type_attr \ | |
10562 | ppc_elf_vxworks_get_sec_type_attr | |
9d8504b1 PB |
10563 | #undef elf_backend_emit_relocs |
10564 | #define elf_backend_emit_relocs \ | |
10565 | elf_vxworks_emit_relocs | |
10566 | ||
10567 | #undef elf32_bed | |
10568 | #define elf32_bed ppc_elf_vxworks_bed | |
10569 | ||
10570 | #include "elf32-target.h" |