| 1 | /* IBM S/390-specific support for 32-bit ELF |
| 2 | Copyright (C) 2000-2016 Free Software Foundation, Inc. |
| 3 | Contributed by Carl B. Pedersen and Martin Schwidefsky. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 20 | 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "bfdlink.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/s390.h" |
| 28 | #include <stdarg.h> |
| 29 | |
| 30 | static bfd_reloc_status_type |
| 31 | s390_tls_reloc (bfd *, arelent *, asymbol *, void *, |
| 32 | asection *, bfd *, char **); |
| 33 | static bfd_reloc_status_type |
| 34 | s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, |
| 35 | asection *, bfd *, char **); |
| 36 | |
| 37 | /* The relocation "howto" table. */ |
| 38 | |
| 39 | static reloc_howto_type elf_howto_table[] = |
| 40 | { |
| 41 | HOWTO (R_390_NONE, /* type */ |
| 42 | 0, /* rightshift */ |
| 43 | 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ |
| 44 | 0, /* bitsize */ |
| 45 | FALSE, /* pc_relative */ |
| 46 | 0, /* bitpos */ |
| 47 | complain_overflow_dont, /* complain_on_overflow */ |
| 48 | bfd_elf_generic_reloc, /* special_function */ |
| 49 | "R_390_NONE", /* name */ |
| 50 | FALSE, /* partial_inplace */ |
| 51 | 0, /* src_mask */ |
| 52 | 0, /* dst_mask */ |
| 53 | FALSE), /* pcrel_offset */ |
| 54 | |
| 55 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
| 56 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), |
| 57 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| 58 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), |
| 59 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 60 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), |
| 61 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 62 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), |
| 63 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 64 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), |
| 65 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, |
| 66 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
| 67 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 68 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), |
| 69 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 70 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), |
| 71 | HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 72 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), |
| 73 | HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 74 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), |
| 75 | HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 76 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), |
| 77 | HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 78 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), |
| 79 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 80 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), |
| 81 | HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 82 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), |
| 83 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 84 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), |
| 85 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| 86 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), |
| 87 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| 88 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), |
| 89 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| 90 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), |
| 91 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 92 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), |
| 93 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 94 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), |
| 95 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 96 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), |
| 97 | EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ |
| 98 | EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ |
| 99 | EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ |
| 100 | EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ |
| 101 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 102 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), |
| 103 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 104 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), |
| 105 | EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ |
| 106 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| 107 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), |
| 108 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 109 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), |
| 110 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 111 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), |
| 112 | EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ |
| 113 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 114 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), |
| 115 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 116 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), |
| 117 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 118 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), |
| 119 | EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ |
| 120 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
| 121 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), |
| 122 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
| 123 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), |
| 124 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
| 125 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), |
| 126 | HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 127 | bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), |
| 128 | EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ |
| 129 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, |
| 130 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), |
| 131 | HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 132 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), |
| 133 | EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ |
| 134 | HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 135 | bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), |
| 136 | EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ |
| 137 | HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 138 | bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), |
| 139 | EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ |
| 140 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 141 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), |
| 142 | HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 143 | bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), |
| 144 | EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ |
| 145 | HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 146 | bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), |
| 147 | EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ |
| 148 | HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 149 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), |
| 150 | HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 151 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), |
| 152 | HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 153 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), |
| 154 | HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
| 155 | s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), |
| 156 | HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
| 157 | s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), |
| 158 | HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
| 159 | s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), |
| 160 | HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
| 161 | s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), |
| 162 | HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, |
| 163 | bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE), |
| 164 | HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, |
| 165 | bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), |
| 166 | HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, |
| 167 | bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), |
| 168 | HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, |
| 169 | bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), |
| 170 | HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, |
| 171 | bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), |
| 172 | }; |
| 173 | |
| 174 | /* GNU extension to record C++ vtable hierarchy. */ |
| 175 | static reloc_howto_type elf32_s390_vtinherit_howto = |
| 176 | HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
| 177 | static reloc_howto_type elf32_s390_vtentry_howto = |
| 178 | HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); |
| 179 | |
| 180 | static reloc_howto_type * |
| 181 | elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 182 | bfd_reloc_code_real_type code) |
| 183 | { |
| 184 | switch (code) |
| 185 | { |
| 186 | case BFD_RELOC_NONE: |
| 187 | return &elf_howto_table[(int) R_390_NONE]; |
| 188 | case BFD_RELOC_8: |
| 189 | return &elf_howto_table[(int) R_390_8]; |
| 190 | case BFD_RELOC_390_12: |
| 191 | return &elf_howto_table[(int) R_390_12]; |
| 192 | case BFD_RELOC_16: |
| 193 | return &elf_howto_table[(int) R_390_16]; |
| 194 | case BFD_RELOC_32: |
| 195 | return &elf_howto_table[(int) R_390_32]; |
| 196 | case BFD_RELOC_CTOR: |
| 197 | return &elf_howto_table[(int) R_390_32]; |
| 198 | case BFD_RELOC_32_PCREL: |
| 199 | return &elf_howto_table[(int) R_390_PC32]; |
| 200 | case BFD_RELOC_390_GOT12: |
| 201 | return &elf_howto_table[(int) R_390_GOT12]; |
| 202 | case BFD_RELOC_32_GOT_PCREL: |
| 203 | return &elf_howto_table[(int) R_390_GOT32]; |
| 204 | case BFD_RELOC_390_PLT32: |
| 205 | return &elf_howto_table[(int) R_390_PLT32]; |
| 206 | case BFD_RELOC_390_COPY: |
| 207 | return &elf_howto_table[(int) R_390_COPY]; |
| 208 | case BFD_RELOC_390_GLOB_DAT: |
| 209 | return &elf_howto_table[(int) R_390_GLOB_DAT]; |
| 210 | case BFD_RELOC_390_JMP_SLOT: |
| 211 | return &elf_howto_table[(int) R_390_JMP_SLOT]; |
| 212 | case BFD_RELOC_390_RELATIVE: |
| 213 | return &elf_howto_table[(int) R_390_RELATIVE]; |
| 214 | case BFD_RELOC_32_GOTOFF: |
| 215 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
| 216 | case BFD_RELOC_390_GOTPC: |
| 217 | return &elf_howto_table[(int) R_390_GOTPC]; |
| 218 | case BFD_RELOC_390_GOT16: |
| 219 | return &elf_howto_table[(int) R_390_GOT16]; |
| 220 | case BFD_RELOC_16_PCREL: |
| 221 | return &elf_howto_table[(int) R_390_PC16]; |
| 222 | case BFD_RELOC_390_PC12DBL: |
| 223 | return &elf_howto_table[(int) R_390_PC12DBL]; |
| 224 | case BFD_RELOC_390_PLT12DBL: |
| 225 | return &elf_howto_table[(int) R_390_PLT12DBL]; |
| 226 | case BFD_RELOC_390_PC16DBL: |
| 227 | return &elf_howto_table[(int) R_390_PC16DBL]; |
| 228 | case BFD_RELOC_390_PLT16DBL: |
| 229 | return &elf_howto_table[(int) R_390_PLT16DBL]; |
| 230 | case BFD_RELOC_390_PC24DBL: |
| 231 | return &elf_howto_table[(int) R_390_PC24DBL]; |
| 232 | case BFD_RELOC_390_PLT24DBL: |
| 233 | return &elf_howto_table[(int) R_390_PLT24DBL]; |
| 234 | case BFD_RELOC_390_PC32DBL: |
| 235 | return &elf_howto_table[(int) R_390_PC32DBL]; |
| 236 | case BFD_RELOC_390_PLT32DBL: |
| 237 | return &elf_howto_table[(int) R_390_PLT32DBL]; |
| 238 | case BFD_RELOC_390_GOTPCDBL: |
| 239 | return &elf_howto_table[(int) R_390_GOTPCDBL]; |
| 240 | case BFD_RELOC_390_GOTENT: |
| 241 | return &elf_howto_table[(int) R_390_GOTENT]; |
| 242 | case BFD_RELOC_16_GOTOFF: |
| 243 | return &elf_howto_table[(int) R_390_GOTOFF16]; |
| 244 | case BFD_RELOC_390_GOTPLT12: |
| 245 | return &elf_howto_table[(int) R_390_GOTPLT12]; |
| 246 | case BFD_RELOC_390_GOTPLT16: |
| 247 | return &elf_howto_table[(int) R_390_GOTPLT16]; |
| 248 | case BFD_RELOC_390_GOTPLT32: |
| 249 | return &elf_howto_table[(int) R_390_GOTPLT32]; |
| 250 | case BFD_RELOC_390_GOTPLTENT: |
| 251 | return &elf_howto_table[(int) R_390_GOTPLTENT]; |
| 252 | case BFD_RELOC_390_PLTOFF16: |
| 253 | return &elf_howto_table[(int) R_390_PLTOFF16]; |
| 254 | case BFD_RELOC_390_PLTOFF32: |
| 255 | return &elf_howto_table[(int) R_390_PLTOFF32]; |
| 256 | case BFD_RELOC_390_TLS_LOAD: |
| 257 | return &elf_howto_table[(int) R_390_TLS_LOAD]; |
| 258 | case BFD_RELOC_390_TLS_GDCALL: |
| 259 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; |
| 260 | case BFD_RELOC_390_TLS_LDCALL: |
| 261 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; |
| 262 | case BFD_RELOC_390_TLS_GD32: |
| 263 | return &elf_howto_table[(int) R_390_TLS_GD32]; |
| 264 | case BFD_RELOC_390_TLS_GOTIE12: |
| 265 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; |
| 266 | case BFD_RELOC_390_TLS_GOTIE32: |
| 267 | return &elf_howto_table[(int) R_390_TLS_GOTIE32]; |
| 268 | case BFD_RELOC_390_TLS_LDM32: |
| 269 | return &elf_howto_table[(int) R_390_TLS_LDM32]; |
| 270 | case BFD_RELOC_390_TLS_IE32: |
| 271 | return &elf_howto_table[(int) R_390_TLS_IE32]; |
| 272 | case BFD_RELOC_390_TLS_IEENT: |
| 273 | return &elf_howto_table[(int) R_390_TLS_IEENT]; |
| 274 | case BFD_RELOC_390_TLS_LE32: |
| 275 | return &elf_howto_table[(int) R_390_TLS_LE32]; |
| 276 | case BFD_RELOC_390_TLS_LDO32: |
| 277 | return &elf_howto_table[(int) R_390_TLS_LDO32]; |
| 278 | case BFD_RELOC_390_TLS_DTPMOD: |
| 279 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; |
| 280 | case BFD_RELOC_390_TLS_DTPOFF: |
| 281 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; |
| 282 | case BFD_RELOC_390_TLS_TPOFF: |
| 283 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; |
| 284 | case BFD_RELOC_390_20: |
| 285 | return &elf_howto_table[(int) R_390_20]; |
| 286 | case BFD_RELOC_390_GOT20: |
| 287 | return &elf_howto_table[(int) R_390_GOT20]; |
| 288 | case BFD_RELOC_390_GOTPLT20: |
| 289 | return &elf_howto_table[(int) R_390_GOTPLT20]; |
| 290 | case BFD_RELOC_390_TLS_GOTIE20: |
| 291 | return &elf_howto_table[(int) R_390_TLS_GOTIE20]; |
| 292 | case BFD_RELOC_390_IRELATIVE: |
| 293 | return &elf_howto_table[(int) R_390_IRELATIVE]; |
| 294 | case BFD_RELOC_VTABLE_INHERIT: |
| 295 | return &elf32_s390_vtinherit_howto; |
| 296 | case BFD_RELOC_VTABLE_ENTRY: |
| 297 | return &elf32_s390_vtentry_howto; |
| 298 | default: |
| 299 | break; |
| 300 | } |
| 301 | return 0; |
| 302 | } |
| 303 | |
| 304 | static reloc_howto_type * |
| 305 | elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 306 | const char *r_name) |
| 307 | { |
| 308 | unsigned int i; |
| 309 | |
| 310 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) |
| 311 | if (elf_howto_table[i].name != NULL |
| 312 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) |
| 313 | return &elf_howto_table[i]; |
| 314 | |
| 315 | if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0) |
| 316 | return &elf32_s390_vtinherit_howto; |
| 317 | if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0) |
| 318 | return &elf32_s390_vtentry_howto; |
| 319 | |
| 320 | return NULL; |
| 321 | } |
| 322 | |
| 323 | /* We need to use ELF32_R_TYPE so we have our own copy of this function, |
| 324 | and elf32-s390.c has its own copy. */ |
| 325 | |
| 326 | static void |
| 327 | elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 328 | arelent *cache_ptr, |
| 329 | Elf_Internal_Rela *dst) |
| 330 | { |
| 331 | unsigned int r_type = ELF32_R_TYPE(dst->r_info); |
| 332 | switch (r_type) |
| 333 | { |
| 334 | case R_390_GNU_VTINHERIT: |
| 335 | cache_ptr->howto = &elf32_s390_vtinherit_howto; |
| 336 | break; |
| 337 | |
| 338 | case R_390_GNU_VTENTRY: |
| 339 | cache_ptr->howto = &elf32_s390_vtentry_howto; |
| 340 | break; |
| 341 | |
| 342 | default: |
| 343 | if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) |
| 344 | { |
| 345 | /* xgettext:c-format */ |
| 346 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
| 347 | abfd, (int) r_type); |
| 348 | r_type = R_390_NONE; |
| 349 | } |
| 350 | cache_ptr->howto = &elf_howto_table[r_type]; |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | /* A relocation function which doesn't do anything. */ |
| 355 | static bfd_reloc_status_type |
| 356 | s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 357 | arelent *reloc_entry, |
| 358 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 359 | void * data ATTRIBUTE_UNUSED, |
| 360 | asection *input_section, |
| 361 | bfd *output_bfd, |
| 362 | char **error_message ATTRIBUTE_UNUSED) |
| 363 | { |
| 364 | if (output_bfd) |
| 365 | reloc_entry->address += input_section->output_offset; |
| 366 | return bfd_reloc_ok; |
| 367 | } |
| 368 | |
| 369 | /* Handle the large displacement relocs. */ |
| 370 | static bfd_reloc_status_type |
| 371 | s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 372 | arelent *reloc_entry, |
| 373 | asymbol *symbol, |
| 374 | void * data ATTRIBUTE_UNUSED, |
| 375 | asection *input_section, |
| 376 | bfd *output_bfd, |
| 377 | char **error_message ATTRIBUTE_UNUSED) |
| 378 | { |
| 379 | reloc_howto_type *howto = reloc_entry->howto; |
| 380 | bfd_vma relocation; |
| 381 | bfd_vma insn; |
| 382 | |
| 383 | if (output_bfd != (bfd *) NULL |
| 384 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 385 | && (! howto->partial_inplace |
| 386 | || reloc_entry->addend == 0)) |
| 387 | { |
| 388 | reloc_entry->address += input_section->output_offset; |
| 389 | return bfd_reloc_ok; |
| 390 | } |
| 391 | |
| 392 | if (output_bfd != NULL) |
| 393 | return bfd_reloc_continue; |
| 394 | |
| 395 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 396 | return bfd_reloc_outofrange; |
| 397 | |
| 398 | relocation = (symbol->value |
| 399 | + symbol->section->output_section->vma |
| 400 | + symbol->section->output_offset); |
| 401 | relocation += reloc_entry->addend; |
| 402 | if (howto->pc_relative) |
| 403 | { |
| 404 | relocation -= (input_section->output_section->vma |
| 405 | + input_section->output_offset); |
| 406 | relocation -= reloc_entry->address; |
| 407 | } |
| 408 | |
| 409 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 410 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; |
| 411 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| 412 | |
| 413 | if ((bfd_signed_vma) relocation < - 0x80000 |
| 414 | || (bfd_signed_vma) relocation > 0x7ffff) |
| 415 | return bfd_reloc_overflow; |
| 416 | else |
| 417 | return bfd_reloc_ok; |
| 418 | } |
| 419 | |
| 420 | static bfd_boolean |
| 421 | elf_s390_is_local_label_name (bfd *abfd, const char *name) |
| 422 | { |
| 423 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) |
| 424 | return TRUE; |
| 425 | |
| 426 | return _bfd_elf_is_local_label_name (abfd, name); |
| 427 | } |
| 428 | |
| 429 | /* Functions for the 390 ELF linker. */ |
| 430 | |
| 431 | /* The name of the dynamic interpreter. This is put in the .interp |
| 432 | section. */ |
| 433 | |
| 434 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 435 | |
| 436 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 437 | copying dynamic variables from a shared lib into an app's dynbss |
| 438 | section, and instead use a dynamic relocation to point into the |
| 439 | shared lib. */ |
| 440 | #define ELIMINATE_COPY_RELOCS 1 |
| 441 | |
| 442 | /* The size in bytes of the first entry in the procedure linkage table. */ |
| 443 | #define PLT_FIRST_ENTRY_SIZE 32 |
| 444 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 445 | #define PLT_ENTRY_SIZE 32 |
| 446 | |
| 447 | #define GOT_ENTRY_SIZE 4 |
| 448 | |
| 449 | #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela) |
| 450 | |
| 451 | /* The first three entries in a procedure linkage table are reserved, |
| 452 | and the initial contents are unimportant (we zero them out). |
| 453 | Subsequent entries look like this. See the SVR4 ABI 386 |
| 454 | supplement to see how this works. */ |
| 455 | |
| 456 | /* For the s390, simple addr offset can only be 0 - 4096. |
| 457 | To use the full 2 GB address space, several instructions |
| 458 | are needed to load an address in a register and execute |
| 459 | a branch( or just saving the address) |
| 460 | |
| 461 | Furthermore, only r 0 and 1 are free to use!!! */ |
| 462 | |
| 463 | /* The first 3 words in the GOT are then reserved. |
| 464 | Word 0 is the address of the dynamic table. |
| 465 | Word 1 is a pointer to a structure describing the object |
| 466 | Word 2 is used to point to the loader entry address. |
| 467 | |
| 468 | The code for position independent PLT entries looks like this: |
| 469 | |
| 470 | r12 holds addr of the current GOT at entry to the PLT |
| 471 | |
| 472 | The GOT holds the address in the PLT to be executed. |
| 473 | The loader then gets: |
| 474 | 24(15) = Pointer to the structure describing the object. |
| 475 | 28(15) = Offset into rela.plt |
| 476 | |
| 477 | The loader must then find the module where the function is |
| 478 | and insert the address in the GOT. |
| 479 | |
| 480 | Note: 390 can only address +- 64 K relative. |
| 481 | We check if offset > 65536, then make a relative branch -64xxx |
| 482 | back to a previous defined branch |
| 483 | |
| 484 | PLT1: BASR 1,0 # 2 bytes |
| 485 | L 1,22(1) # 4 bytes Load offset in GOT in r 1 |
| 486 | L 1,(1,12) # 4 bytes Load address from GOT in r1 |
| 487 | BCR 15,1 # 2 bytes Jump to address |
| 488 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time |
| 489 | L 1,14(1) # 4 bytes Load offset in symol table in r1 |
| 490 | BRC 15,-x # 4 bytes Jump to start of PLT |
| 491 | .word 0 # 2 bytes filler |
| 492 | .long ? # 4 bytes offset in GOT |
| 493 | .long ? # 4 bytes offset into rela.plt |
| 494 | |
| 495 | This was the general case. There are two additional, optimizes PLT |
| 496 | definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. |
| 497 | First the one for GOT offsets < 4096: |
| 498 | |
| 499 | PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 |
| 500 | BCR 15,1 # 2 bytes Jump to address |
| 501 | .word 0,0,0 # 6 bytes filler |
| 502 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time |
| 503 | L 1,14(1) # 4 bytes Load offset in rela.plt in r1 |
| 504 | BRC 15,-x # 4 bytes Jump to start of PLT |
| 505 | .word 0,0,0 # 6 bytes filler |
| 506 | .long ? # 4 bytes offset into rela.plt |
| 507 | |
| 508 | Second the one for GOT offsets < 32768: |
| 509 | |
| 510 | PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 |
| 511 | L 1,(1,12) # 4 bytes Load address from GOT to r1 |
| 512 | BCR 15,1 # 2 bytes Jump to address |
| 513 | .word 0 # 2 bytes filler |
| 514 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time |
| 515 | L 1,14(1) # 4 bytes Load offset in rela.plt in r1 |
| 516 | BRC 15,-x # 4 bytes Jump to start of PLT |
| 517 | .word 0,0,0 # 6 bytes filler |
| 518 | .long ? # 4 bytes offset into rela.plt |
| 519 | |
| 520 | Total = 32 bytes per PLT entry |
| 521 | |
| 522 | The code for static build PLT entries looks like this: |
| 523 | |
| 524 | PLT1: BASR 1,0 # 2 bytes |
| 525 | L 1,22(1) # 4 bytes Load address of GOT entry |
| 526 | L 1,0(0,1) # 4 bytes Load address from GOT in r1 |
| 527 | BCR 15,1 # 2 bytes Jump to address |
| 528 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time |
| 529 | L 1,14(1) # 4 bytes Load offset in symbol table in r1 |
| 530 | BRC 15,-x # 4 bytes Jump to start of PLT |
| 531 | .word 0 # 2 bytes filler |
| 532 | .long ? # 4 bytes address of GOT entry |
| 533 | .long ? # 4 bytes offset into rela.plt */ |
| 534 | |
| 535 | static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] = |
| 536 | { |
| 537 | 0x0d, 0x10, /* basr %r1,%r0 */ |
| 538 | 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */ |
| 539 | 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */ |
| 540 | 0x07, 0xf1, /* br %r1 */ |
| 541 | 0x0d, 0x10, /* basr %r1,%r0 */ |
| 542 | 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ |
| 543 | 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ |
| 544 | 0x00, 0x00, /* padding */ |
| 545 | 0x00, 0x00, 0x00, 0x00, /* GOT offset */ |
| 546 | 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */ |
| 547 | }; |
| 548 | |
| 549 | /* Generic PLT pic entry. */ |
| 550 | static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] = |
| 551 | { |
| 552 | 0x0d, 0x10, /* basr %r1,%r0 */ |
| 553 | 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */ |
| 554 | 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */ |
| 555 | 0x07, 0xf1, /* br %r1 */ |
| 556 | 0x0d, 0x10, /* basr %r1,%r0 */ |
| 557 | 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ |
| 558 | 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ |
| 559 | 0x00, 0x00, /* padding */ |
| 560 | 0x00, 0x00, 0x00, 0x00, /* GOT offset */ |
| 561 | 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */ |
| 562 | }; |
| 563 | |
| 564 | /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced |
| 565 | when generating the PLT slot with the GOT offset. */ |
| 566 | static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] = |
| 567 | { |
| 568 | 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */ |
| 569 | 0x07, 0xf1, /* br %r1 */ |
| 570 | 0x00, 0x00, 0x00, 0x00, /* padding */ |
| 571 | 0x00, 0x00, |
| 572 | 0x0d, 0x10, /* basr %r1,%r0 */ |
| 573 | 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ |
| 574 | 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ |
| 575 | 0x00, 0x00, 0x00, 0x00, |
| 576 | 0x00, 0x00, 0x00, 0x00 |
| 577 | }; |
| 578 | |
| 579 | /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced |
| 580 | when generating the PLT slot with the GOT offset. */ |
| 581 | static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] = |
| 582 | { |
| 583 | 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */ |
| 584 | 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */ |
| 585 | 0x07, 0xf1, /* br %r1 */ |
| 586 | 0x00, 0x00, |
| 587 | 0x0d, 0x10, /* basr %r1,%r0 */ |
| 588 | 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ |
| 589 | 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ |
| 590 | 0x00, 0x00, 0x00, 0x00, |
| 591 | 0x00, 0x00, 0x00, 0x00, |
| 592 | 0x00, 0x00 |
| 593 | }; |
| 594 | |
| 595 | /* The first PLT entry pushes the offset into the rela.plt |
| 596 | from R1 onto the stack at 8(15) and the loader object info |
| 597 | at 12(15), loads the loader address in R1 and jumps to it. */ |
| 598 | |
| 599 | /* The first entry in the PLT for PIC code: |
| 600 | |
| 601 | PLT0: |
| 602 | ST 1,28(15) # R1 has offset into rela.plt |
| 603 | L 1,4(12) # Get loader ino(object struct address) |
| 604 | ST 1,24(15) # Store address |
| 605 | L 1,8(12) # Entry address of loader in R1 |
| 606 | BR 1 # Jump to loader |
| 607 | |
| 608 | The first entry in the PLT for static code: |
| 609 | |
| 610 | PLT0: |
| 611 | ST 1,28(15) # R1 has offset into rela.plt |
| 612 | BASR 1,0 |
| 613 | L 1,18(0,1) # Get address of GOT |
| 614 | MVC 24(4,15),4(1) # Move loader ino to stack |
| 615 | L 1,8(1) # Get address of loader |
| 616 | BR 1 # Jump to loader |
| 617 | .word 0 # filler |
| 618 | .long got # address of GOT */ |
| 619 | |
| 620 | static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] = |
| 621 | { |
| 622 | 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */ |
| 623 | 0x0d, 0x10, /* basr %r1,%r0 */ |
| 624 | 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */ |
| 625 | 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */ |
| 626 | 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */ |
| 627 | 0x07, 0xf1, /* br %r1 */ |
| 628 | 0x00, 0x00, 0x00, 0x00, |
| 629 | 0x00, 0x00, 0x00, 0x00, |
| 630 | 0x00, 0x00 |
| 631 | }; |
| 632 | |
| 633 | static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] = |
| 634 | { |
| 635 | 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */ |
| 636 | 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */ |
| 637 | 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */ |
| 638 | 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */ |
| 639 | 0x07, 0xf1, /* br %r1 */ |
| 640 | 0x00, 0x00, 0x00, 0x00, |
| 641 | 0x00, 0x00, 0x00, 0x00, |
| 642 | 0x00, 0x00, 0x00, 0x00, |
| 643 | 0x00, 0x00 |
| 644 | }; |
| 645 | |
| 646 | |
| 647 | /* s390 ELF linker hash entry. */ |
| 648 | |
| 649 | struct elf_s390_link_hash_entry |
| 650 | { |
| 651 | struct elf_link_hash_entry elf; |
| 652 | |
| 653 | /* Track dynamic relocs copied for this symbol. */ |
| 654 | struct elf_dyn_relocs *dyn_relocs; |
| 655 | |
| 656 | /* Number of GOTPLT references for a function. */ |
| 657 | bfd_signed_vma gotplt_refcount; |
| 658 | |
| 659 | #define GOT_UNKNOWN 0 |
| 660 | #define GOT_NORMAL 1 |
| 661 | #define GOT_TLS_GD 2 |
| 662 | #define GOT_TLS_IE 3 |
| 663 | #define GOT_TLS_IE_NLT 4 |
| 664 | unsigned char tls_type; |
| 665 | |
| 666 | /* For pointer equality reasons we might need to change the symbol |
| 667 | type from STT_GNU_IFUNC to STT_FUNC together with its value and |
| 668 | section entry. So after alloc_dynrelocs only these values should |
| 669 | be used. In order to check whether a symbol is IFUNC use |
| 670 | s390_is_ifunc_symbol_p. */ |
| 671 | bfd_vma ifunc_resolver_address; |
| 672 | asection *ifunc_resolver_section; |
| 673 | }; |
| 674 | |
| 675 | #define elf_s390_hash_entry(ent) \ |
| 676 | ((struct elf_s390_link_hash_entry *)(ent)) |
| 677 | |
| 678 | /* This structure represents an entry in the local PLT list needed for |
| 679 | local IFUNC symbols. */ |
| 680 | struct plt_entry |
| 681 | { |
| 682 | /* The section of the local symbol. |
| 683 | Set in relocate_section and used in finish_dynamic_sections. */ |
| 684 | asection *sec; |
| 685 | |
| 686 | union |
| 687 | { |
| 688 | bfd_signed_vma refcount; |
| 689 | bfd_vma offset; |
| 690 | } plt; |
| 691 | }; |
| 692 | |
| 693 | /* NOTE: Keep this structure in sync with |
| 694 | the one declared in elf64-s390.c. */ |
| 695 | struct elf_s390_obj_tdata |
| 696 | { |
| 697 | struct elf_obj_tdata root; |
| 698 | |
| 699 | /* A local PLT is needed for ifunc symbols. */ |
| 700 | struct plt_entry *local_plt; |
| 701 | |
| 702 | /* TLS type for each local got entry. */ |
| 703 | char *local_got_tls_type; |
| 704 | }; |
| 705 | |
| 706 | #define elf_s390_tdata(abfd) \ |
| 707 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) |
| 708 | |
| 709 | #define elf_s390_local_plt(abfd) \ |
| 710 | (elf_s390_tdata (abfd)->local_plt) |
| 711 | |
| 712 | #define elf_s390_local_got_tls_type(abfd) \ |
| 713 | (elf_s390_tdata (abfd)->local_got_tls_type) |
| 714 | |
| 715 | #define is_s390_elf(bfd) \ |
| 716 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 717 | && elf_tdata (bfd) != NULL \ |
| 718 | && elf_object_id (bfd) == S390_ELF_DATA) |
| 719 | |
| 720 | static bfd_boolean |
| 721 | elf_s390_mkobject (bfd *abfd) |
| 722 | { |
| 723 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata), |
| 724 | S390_ELF_DATA); |
| 725 | } |
| 726 | |
| 727 | static bfd_boolean |
| 728 | elf_s390_object_p (bfd *abfd) |
| 729 | { |
| 730 | /* Set the right machine number for an s390 elf32 file. */ |
| 731 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31); |
| 732 | } |
| 733 | |
| 734 | /* s390 ELF linker hash table. */ |
| 735 | |
| 736 | struct elf_s390_link_hash_table |
| 737 | { |
| 738 | struct elf_link_hash_table elf; |
| 739 | |
| 740 | /* Short-cuts to get to dynamic linker sections. */ |
| 741 | asection *sdynbss; |
| 742 | asection *srelbss; |
| 743 | asection *irelifunc; |
| 744 | |
| 745 | union |
| 746 | { |
| 747 | bfd_signed_vma refcount; |
| 748 | bfd_vma offset; |
| 749 | } tls_ldm_got; |
| 750 | |
| 751 | /* Small local sym cache. */ |
| 752 | struct sym_cache sym_cache; |
| 753 | }; |
| 754 | |
| 755 | /* Get the s390 ELF linker hash table from a link_info structure. */ |
| 756 | |
| 757 | #define elf_s390_hash_table(p) \ |
| 758 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 759 | == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) |
| 760 | |
| 761 | #undef ELF64 |
| 762 | #include "elf-s390-common.c" |
| 763 | |
| 764 | /* Create an entry in an s390 ELF linker hash table. */ |
| 765 | |
| 766 | static struct bfd_hash_entry * |
| 767 | link_hash_newfunc (struct bfd_hash_entry *entry, |
| 768 | struct bfd_hash_table *table, |
| 769 | const char *string) |
| 770 | { |
| 771 | /* Allocate the structure if it has not already been allocated by a |
| 772 | subclass. */ |
| 773 | if (entry == NULL) |
| 774 | { |
| 775 | entry = bfd_hash_allocate (table, |
| 776 | sizeof (struct elf_s390_link_hash_entry)); |
| 777 | if (entry == NULL) |
| 778 | return entry; |
| 779 | } |
| 780 | |
| 781 | /* Call the allocation method of the superclass. */ |
| 782 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 783 | if (entry != NULL) |
| 784 | { |
| 785 | struct elf_s390_link_hash_entry *eh; |
| 786 | |
| 787 | eh = (struct elf_s390_link_hash_entry *) entry; |
| 788 | eh->dyn_relocs = NULL; |
| 789 | eh->gotplt_refcount = 0; |
| 790 | eh->tls_type = GOT_UNKNOWN; |
| 791 | eh->ifunc_resolver_address = 0; |
| 792 | eh->ifunc_resolver_section = NULL; |
| 793 | } |
| 794 | |
| 795 | return entry; |
| 796 | } |
| 797 | |
| 798 | /* Create an s390 ELF linker hash table. */ |
| 799 | |
| 800 | static struct bfd_link_hash_table * |
| 801 | elf_s390_link_hash_table_create (bfd *abfd) |
| 802 | { |
| 803 | struct elf_s390_link_hash_table *ret; |
| 804 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
| 805 | |
| 806 | ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt); |
| 807 | if (ret == NULL) |
| 808 | return NULL; |
| 809 | |
| 810 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
| 811 | sizeof (struct elf_s390_link_hash_entry), |
| 812 | S390_ELF_DATA)) |
| 813 | { |
| 814 | free (ret); |
| 815 | return NULL; |
| 816 | } |
| 817 | |
| 818 | return &ret->elf.root; |
| 819 | } |
| 820 | |
| 821 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
| 822 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our |
| 823 | hash table. */ |
| 824 | |
| 825 | static bfd_boolean |
| 826 | elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
| 827 | { |
| 828 | struct elf_s390_link_hash_table *htab; |
| 829 | |
| 830 | htab = elf_s390_hash_table (info); |
| 831 | if (!htab->elf.sgot && !_bfd_elf_create_got_section (dynobj, info)) |
| 832 | return FALSE; |
| 833 | |
| 834 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| 835 | return FALSE; |
| 836 | |
| 837 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
| 838 | if (!bfd_link_pic (info)) |
| 839 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
| 840 | |
| 841 | if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss |
| 842 | || (!bfd_link_pic (info) && !htab->srelbss)) |
| 843 | abort (); |
| 844 | |
| 845 | return TRUE; |
| 846 | } |
| 847 | |
| 848 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 849 | |
| 850 | static void |
| 851 | elf_s390_copy_indirect_symbol (struct bfd_link_info *info, |
| 852 | struct elf_link_hash_entry *dir, |
| 853 | struct elf_link_hash_entry *ind) |
| 854 | { |
| 855 | struct elf_s390_link_hash_entry *edir, *eind; |
| 856 | |
| 857 | edir = (struct elf_s390_link_hash_entry *) dir; |
| 858 | eind = (struct elf_s390_link_hash_entry *) ind; |
| 859 | |
| 860 | if (eind->dyn_relocs != NULL) |
| 861 | { |
| 862 | if (edir->dyn_relocs != NULL) |
| 863 | { |
| 864 | struct elf_dyn_relocs **pp; |
| 865 | struct elf_dyn_relocs *p; |
| 866 | |
| 867 | /* Add reloc counts against the indirect sym to the direct sym |
| 868 | list. Merge any entries against the same section. */ |
| 869 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 870 | { |
| 871 | struct elf_dyn_relocs *q; |
| 872 | |
| 873 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 874 | if (q->sec == p->sec) |
| 875 | { |
| 876 | q->pc_count += p->pc_count; |
| 877 | q->count += p->count; |
| 878 | *pp = p->next; |
| 879 | break; |
| 880 | } |
| 881 | if (q == NULL) |
| 882 | pp = &p->next; |
| 883 | } |
| 884 | *pp = edir->dyn_relocs; |
| 885 | } |
| 886 | |
| 887 | edir->dyn_relocs = eind->dyn_relocs; |
| 888 | eind->dyn_relocs = NULL; |
| 889 | } |
| 890 | |
| 891 | if (ind->root.type == bfd_link_hash_indirect |
| 892 | && dir->got.refcount <= 0) |
| 893 | { |
| 894 | edir->tls_type = eind->tls_type; |
| 895 | eind->tls_type = GOT_UNKNOWN; |
| 896 | } |
| 897 | |
| 898 | if (ELIMINATE_COPY_RELOCS |
| 899 | && ind->root.type != bfd_link_hash_indirect |
| 900 | && dir->dynamic_adjusted) |
| 901 | { |
| 902 | /* If called to transfer flags for a weakdef during processing |
| 903 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. |
| 904 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| 905 | dir->ref_dynamic |= ind->ref_dynamic; |
| 906 | dir->ref_regular |= ind->ref_regular; |
| 907 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; |
| 908 | dir->needs_plt |= ind->needs_plt; |
| 909 | } |
| 910 | else |
| 911 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 912 | } |
| 913 | |
| 914 | static int |
| 915 | elf_s390_tls_transition (struct bfd_link_info *info, |
| 916 | int r_type, |
| 917 | int is_local) |
| 918 | { |
| 919 | if (bfd_link_pic (info)) |
| 920 | return r_type; |
| 921 | |
| 922 | switch (r_type) |
| 923 | { |
| 924 | case R_390_TLS_GD32: |
| 925 | case R_390_TLS_IE32: |
| 926 | if (is_local) |
| 927 | return R_390_TLS_LE32; |
| 928 | return R_390_TLS_IE32; |
| 929 | case R_390_TLS_GOTIE32: |
| 930 | if (is_local) |
| 931 | return R_390_TLS_LE32; |
| 932 | return R_390_TLS_GOTIE32; |
| 933 | case R_390_TLS_LDM32: |
| 934 | return R_390_TLS_LE32; |
| 935 | } |
| 936 | |
| 937 | return r_type; |
| 938 | } |
| 939 | |
| 940 | /* Look through the relocs for a section during the first phase, and |
| 941 | allocate space in the global offset table or procedure linkage |
| 942 | table. */ |
| 943 | |
| 944 | static bfd_boolean |
| 945 | elf_s390_check_relocs (bfd *abfd, |
| 946 | struct bfd_link_info *info, |
| 947 | asection *sec, |
| 948 | const Elf_Internal_Rela *relocs) |
| 949 | { |
| 950 | struct elf_s390_link_hash_table *htab; |
| 951 | Elf_Internal_Shdr *symtab_hdr; |
| 952 | struct elf_link_hash_entry **sym_hashes; |
| 953 | const Elf_Internal_Rela *rel; |
| 954 | const Elf_Internal_Rela *rel_end; |
| 955 | asection *sreloc; |
| 956 | bfd_signed_vma *local_got_refcounts; |
| 957 | int tls_type, old_tls_type; |
| 958 | Elf_Internal_Sym *isym; |
| 959 | |
| 960 | if (bfd_link_relocatable (info)) |
| 961 | return TRUE; |
| 962 | |
| 963 | BFD_ASSERT (is_s390_elf (abfd)); |
| 964 | |
| 965 | htab = elf_s390_hash_table (info); |
| 966 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 967 | sym_hashes = elf_sym_hashes (abfd); |
| 968 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 969 | |
| 970 | sreloc = NULL; |
| 971 | |
| 972 | rel_end = relocs + sec->reloc_count; |
| 973 | for (rel = relocs; rel < rel_end; rel++) |
| 974 | { |
| 975 | unsigned int r_type; |
| 976 | unsigned long r_symndx; |
| 977 | struct elf_link_hash_entry *h; |
| 978 | |
| 979 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 980 | |
| 981 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| 982 | { |
| 983 | /* xgettext:c-format */ |
| 984 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
| 985 | abfd, r_symndx); |
| 986 | return FALSE; |
| 987 | } |
| 988 | |
| 989 | if (r_symndx < symtab_hdr->sh_info) |
| 990 | { |
| 991 | /* A local symbol. */ |
| 992 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 993 | abfd, r_symndx); |
| 994 | if (isym == NULL) |
| 995 | return FALSE; |
| 996 | |
| 997 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 998 | { |
| 999 | struct plt_entry *plt; |
| 1000 | |
| 1001 | if (htab->elf.dynobj == NULL) |
| 1002 | htab->elf.dynobj = abfd; |
| 1003 | |
| 1004 | if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) |
| 1005 | return FALSE; |
| 1006 | |
| 1007 | if (local_got_refcounts == NULL) |
| 1008 | { |
| 1009 | if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) |
| 1010 | return FALSE; |
| 1011 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1012 | } |
| 1013 | plt = elf_s390_local_plt (abfd); |
| 1014 | plt[r_symndx].plt.refcount++; |
| 1015 | } |
| 1016 | h = NULL; |
| 1017 | } |
| 1018 | else |
| 1019 | { |
| 1020 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1021 | while (h->root.type == bfd_link_hash_indirect |
| 1022 | || h->root.type == bfd_link_hash_warning) |
| 1023 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1024 | |
| 1025 | /* PR15323, ref flags aren't set for references in the same |
| 1026 | object. */ |
| 1027 | h->root.non_ir_ref = 1; |
| 1028 | } |
| 1029 | |
| 1030 | /* Create got section and local_got_refcounts array if they |
| 1031 | are needed. */ |
| 1032 | r_type = elf_s390_tls_transition (info, |
| 1033 | ELF32_R_TYPE (rel->r_info), |
| 1034 | h == NULL); |
| 1035 | switch (r_type) |
| 1036 | { |
| 1037 | case R_390_GOT12: |
| 1038 | case R_390_GOT16: |
| 1039 | case R_390_GOT20: |
| 1040 | case R_390_GOT32: |
| 1041 | case R_390_GOTENT: |
| 1042 | case R_390_GOTPLT12: |
| 1043 | case R_390_GOTPLT16: |
| 1044 | case R_390_GOTPLT20: |
| 1045 | case R_390_GOTPLT32: |
| 1046 | case R_390_GOTPLTENT: |
| 1047 | case R_390_TLS_GD32: |
| 1048 | case R_390_TLS_GOTIE12: |
| 1049 | case R_390_TLS_GOTIE20: |
| 1050 | case R_390_TLS_GOTIE32: |
| 1051 | case R_390_TLS_IEENT: |
| 1052 | case R_390_TLS_IE32: |
| 1053 | case R_390_TLS_LDM32: |
| 1054 | if (h == NULL |
| 1055 | && local_got_refcounts == NULL) |
| 1056 | { |
| 1057 | if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr)) |
| 1058 | return FALSE; |
| 1059 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1060 | } |
| 1061 | /* Fall through. */ |
| 1062 | case R_390_GOTOFF16: |
| 1063 | case R_390_GOTOFF32: |
| 1064 | case R_390_GOTPC: |
| 1065 | case R_390_GOTPCDBL: |
| 1066 | if (htab->elf.sgot == NULL) |
| 1067 | { |
| 1068 | if (htab->elf.dynobj == NULL) |
| 1069 | htab->elf.dynobj = abfd; |
| 1070 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
| 1071 | return FALSE; |
| 1072 | } |
| 1073 | } |
| 1074 | |
| 1075 | if (h != NULL) |
| 1076 | { |
| 1077 | if (htab->elf.dynobj == NULL) |
| 1078 | htab->elf.dynobj = abfd; |
| 1079 | if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info)) |
| 1080 | return FALSE; |
| 1081 | |
| 1082 | /* Make sure an IFUNC symbol defined in a non-shared object |
| 1083 | always gets a PLT slot. */ |
| 1084 | if (s390_is_ifunc_symbol_p (h) && h->def_regular) |
| 1085 | { |
| 1086 | /* The symbol is called by the dynamic loader in order |
| 1087 | to resolve the relocation. So it is in fact also |
| 1088 | referenced. */ |
| 1089 | h->ref_regular = 1; |
| 1090 | h->needs_plt = 1; |
| 1091 | } |
| 1092 | } |
| 1093 | switch (r_type) |
| 1094 | { |
| 1095 | case R_390_GOTPC: |
| 1096 | case R_390_GOTPCDBL: |
| 1097 | /* These relocs do not need a GOT slot. They just load the |
| 1098 | GOT pointer itself or address something else relative to |
| 1099 | the GOT. Since the GOT pointer has been set up above we |
| 1100 | are done. */ |
| 1101 | break; |
| 1102 | case R_390_GOTOFF16: |
| 1103 | case R_390_GOTOFF32: |
| 1104 | if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular) |
| 1105 | break; |
| 1106 | /* Fall through. */ |
| 1107 | |
| 1108 | case R_390_PLT12DBL: |
| 1109 | case R_390_PLT16DBL: |
| 1110 | case R_390_PLT24DBL: |
| 1111 | case R_390_PLT32DBL: |
| 1112 | case R_390_PLT32: |
| 1113 | case R_390_PLTOFF16: |
| 1114 | case R_390_PLTOFF32: |
| 1115 | /* This symbol requires a procedure linkage table entry. We |
| 1116 | actually build the entry in adjust_dynamic_symbol, |
| 1117 | because this might be a case of linking PIC code which is |
| 1118 | never referenced by a dynamic object, in which case we |
| 1119 | don't need to generate a procedure linkage table entry |
| 1120 | after all. */ |
| 1121 | |
| 1122 | /* If this is a local symbol, we resolve it directly without |
| 1123 | creating a procedure linkage table entry. */ |
| 1124 | if (h != NULL) |
| 1125 | { |
| 1126 | h->needs_plt = 1; |
| 1127 | h->plt.refcount += 1; |
| 1128 | } |
| 1129 | break; |
| 1130 | |
| 1131 | case R_390_GOTPLT12: |
| 1132 | case R_390_GOTPLT16: |
| 1133 | case R_390_GOTPLT20: |
| 1134 | case R_390_GOTPLT32: |
| 1135 | case R_390_GOTPLTENT: |
| 1136 | /* This symbol requires either a procedure linkage table entry |
| 1137 | or an entry in the local got. We actually build the entry |
| 1138 | in adjust_dynamic_symbol because whether this is really a |
| 1139 | global reference can change and with it the fact if we have |
| 1140 | to create a plt entry or a local got entry. To be able to |
| 1141 | make a once global symbol a local one we have to keep track |
| 1142 | of the number of gotplt references that exist for this |
| 1143 | symbol. */ |
| 1144 | if (h != NULL) |
| 1145 | { |
| 1146 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; |
| 1147 | h->needs_plt = 1; |
| 1148 | h->plt.refcount += 1; |
| 1149 | } |
| 1150 | else |
| 1151 | local_got_refcounts[r_symndx] += 1; |
| 1152 | break; |
| 1153 | |
| 1154 | case R_390_TLS_LDM32: |
| 1155 | htab->tls_ldm_got.refcount += 1; |
| 1156 | break; |
| 1157 | |
| 1158 | case R_390_TLS_IE32: |
| 1159 | case R_390_TLS_GOTIE12: |
| 1160 | case R_390_TLS_GOTIE20: |
| 1161 | case R_390_TLS_GOTIE32: |
| 1162 | case R_390_TLS_IEENT: |
| 1163 | if (bfd_link_pic (info)) |
| 1164 | info->flags |= DF_STATIC_TLS; |
| 1165 | /* Fall through. */ |
| 1166 | |
| 1167 | case R_390_GOT12: |
| 1168 | case R_390_GOT16: |
| 1169 | case R_390_GOT20: |
| 1170 | case R_390_GOT32: |
| 1171 | case R_390_GOTENT: |
| 1172 | case R_390_TLS_GD32: |
| 1173 | /* This symbol requires a global offset table entry. */ |
| 1174 | switch (r_type) |
| 1175 | { |
| 1176 | default: |
| 1177 | case R_390_GOT12: |
| 1178 | case R_390_GOT16: |
| 1179 | case R_390_GOT20: |
| 1180 | case R_390_GOT32: |
| 1181 | case R_390_GOTENT: |
| 1182 | tls_type = GOT_NORMAL; |
| 1183 | break; |
| 1184 | case R_390_TLS_GD32: |
| 1185 | tls_type = GOT_TLS_GD; |
| 1186 | break; |
| 1187 | case R_390_TLS_IE32: |
| 1188 | case R_390_TLS_GOTIE32: |
| 1189 | tls_type = GOT_TLS_IE; |
| 1190 | break; |
| 1191 | case R_390_TLS_GOTIE12: |
| 1192 | case R_390_TLS_GOTIE20: |
| 1193 | case R_390_TLS_IEENT: |
| 1194 | tls_type = GOT_TLS_IE_NLT; |
| 1195 | break; |
| 1196 | } |
| 1197 | |
| 1198 | if (h != NULL) |
| 1199 | { |
| 1200 | h->got.refcount += 1; |
| 1201 | old_tls_type = elf_s390_hash_entry(h)->tls_type; |
| 1202 | } |
| 1203 | else |
| 1204 | { |
| 1205 | local_got_refcounts[r_symndx] += 1; |
| 1206 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; |
| 1207 | } |
| 1208 | /* If a TLS symbol is accessed using IE at least once, |
| 1209 | there is no point to use dynamic model for it. */ |
| 1210 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) |
| 1211 | { |
| 1212 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) |
| 1213 | { |
| 1214 | _bfd_error_handler |
| 1215 | /* xgettext:c-format */ |
| 1216 | (_("%B: `%s' accessed both as normal and thread local symbol"), |
| 1217 | abfd, h->root.root.string); |
| 1218 | return FALSE; |
| 1219 | } |
| 1220 | if (old_tls_type > tls_type) |
| 1221 | tls_type = old_tls_type; |
| 1222 | } |
| 1223 | |
| 1224 | if (old_tls_type != tls_type) |
| 1225 | { |
| 1226 | if (h != NULL) |
| 1227 | elf_s390_hash_entry (h)->tls_type = tls_type; |
| 1228 | else |
| 1229 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| 1230 | } |
| 1231 | |
| 1232 | if (r_type != R_390_TLS_IE32) |
| 1233 | break; |
| 1234 | /* Fall through. */ |
| 1235 | |
| 1236 | case R_390_TLS_LE32: |
| 1237 | /* For static linking and executables this reloc will be |
| 1238 | calculated at linktime otherwise a TLS_TPOFF runtime |
| 1239 | reloc will be generated. */ |
| 1240 | if (r_type == R_390_TLS_LE32 && bfd_link_pie (info)) |
| 1241 | break; |
| 1242 | |
| 1243 | if (!bfd_link_pic (info)) |
| 1244 | break; |
| 1245 | info->flags |= DF_STATIC_TLS; |
| 1246 | /* Fall through. */ |
| 1247 | |
| 1248 | case R_390_8: |
| 1249 | case R_390_16: |
| 1250 | case R_390_32: |
| 1251 | case R_390_PC16: |
| 1252 | case R_390_PC12DBL: |
| 1253 | case R_390_PC16DBL: |
| 1254 | case R_390_PC24DBL: |
| 1255 | case R_390_PC32DBL: |
| 1256 | case R_390_PC32: |
| 1257 | if (h != NULL && bfd_link_executable (info)) |
| 1258 | { |
| 1259 | /* If this reloc is in a read-only section, we might |
| 1260 | need a copy reloc. We can't check reliably at this |
| 1261 | stage whether the section is read-only, as input |
| 1262 | sections have not yet been mapped to output sections. |
| 1263 | Tentatively set the flag for now, and correct in |
| 1264 | adjust_dynamic_symbol. */ |
| 1265 | h->non_got_ref = 1; |
| 1266 | |
| 1267 | if (!bfd_link_pic (info)) |
| 1268 | { |
| 1269 | /* We may need a .plt entry if the function this reloc |
| 1270 | refers to is in a shared lib. */ |
| 1271 | h->plt.refcount += 1; |
| 1272 | } |
| 1273 | } |
| 1274 | |
| 1275 | /* If we are creating a shared library, and this is a reloc |
| 1276 | against a global symbol, or a non PC relative reloc |
| 1277 | against a local symbol, then we need to copy the reloc |
| 1278 | into the shared library. However, if we are linking with |
| 1279 | -Bsymbolic, we do not need to copy a reloc against a |
| 1280 | global symbol which is defined in an object we are |
| 1281 | including in the link (i.e., DEF_REGULAR is set). At |
| 1282 | this point we have not seen all the input files, so it is |
| 1283 | possible that DEF_REGULAR is not set now but will be set |
| 1284 | later (it is never cleared). In case of a weak definition, |
| 1285 | DEF_REGULAR may be cleared later by a strong definition in |
| 1286 | a shared library. We account for that possibility below by |
| 1287 | storing information in the relocs_copied field of the hash |
| 1288 | table entry. A similar situation occurs when creating |
| 1289 | shared libraries and symbol visibility changes render the |
| 1290 | symbol local. |
| 1291 | |
| 1292 | If on the other hand, we are creating an executable, we |
| 1293 | may need to keep relocations for symbols satisfied by a |
| 1294 | dynamic library if we manage to avoid copy relocs for the |
| 1295 | symbol. */ |
| 1296 | if ((bfd_link_pic (info) |
| 1297 | && (sec->flags & SEC_ALLOC) != 0 |
| 1298 | && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 |
| 1299 | && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL |
| 1300 | && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL |
| 1301 | && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL |
| 1302 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL |
| 1303 | && ELF32_R_TYPE (rel->r_info) != R_390_PC32) |
| 1304 | || (h != NULL |
| 1305 | && (! SYMBOLIC_BIND (info, h) |
| 1306 | || h->root.type == bfd_link_hash_defweak |
| 1307 | || !h->def_regular)))) |
| 1308 | || (ELIMINATE_COPY_RELOCS |
| 1309 | && !bfd_link_pic (info) |
| 1310 | && (sec->flags & SEC_ALLOC) != 0 |
| 1311 | && h != NULL |
| 1312 | && (h->root.type == bfd_link_hash_defweak |
| 1313 | || !h->def_regular))) |
| 1314 | { |
| 1315 | struct elf_dyn_relocs *p; |
| 1316 | struct elf_dyn_relocs **head; |
| 1317 | |
| 1318 | /* We must copy these reloc types into the output file. |
| 1319 | Create a reloc section in dynobj and make room for |
| 1320 | this reloc. */ |
| 1321 | if (sreloc == NULL) |
| 1322 | { |
| 1323 | if (htab->elf.dynobj == NULL) |
| 1324 | htab->elf.dynobj = abfd; |
| 1325 | |
| 1326 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 1327 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); |
| 1328 | |
| 1329 | if (sreloc == NULL) |
| 1330 | return FALSE; |
| 1331 | } |
| 1332 | |
| 1333 | /* If this is a global symbol, we count the number of |
| 1334 | relocations we need for this symbol. */ |
| 1335 | if (h != NULL) |
| 1336 | { |
| 1337 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
| 1338 | } |
| 1339 | else |
| 1340 | { |
| 1341 | /* Track dynamic relocs needed for local syms too. |
| 1342 | We really need local syms available to do this |
| 1343 | easily. Oh well. */ |
| 1344 | asection *s; |
| 1345 | void *vpp; |
| 1346 | |
| 1347 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 1348 | abfd, r_symndx); |
| 1349 | if (isym == NULL) |
| 1350 | return FALSE; |
| 1351 | |
| 1352 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 1353 | if (s == NULL) |
| 1354 | s = sec; |
| 1355 | |
| 1356 | vpp = &elf_section_data (s)->local_dynrel; |
| 1357 | head = (struct elf_dyn_relocs **) vpp; |
| 1358 | } |
| 1359 | |
| 1360 | p = *head; |
| 1361 | if (p == NULL || p->sec != sec) |
| 1362 | { |
| 1363 | bfd_size_type amt = sizeof *p; |
| 1364 | |
| 1365 | p = ((struct elf_dyn_relocs *) |
| 1366 | bfd_alloc (htab->elf.dynobj, amt)); |
| 1367 | if (p == NULL) |
| 1368 | return FALSE; |
| 1369 | p->next = *head; |
| 1370 | *head = p; |
| 1371 | p->sec = sec; |
| 1372 | p->count = 0; |
| 1373 | p->pc_count = 0; |
| 1374 | } |
| 1375 | |
| 1376 | p->count += 1; |
| 1377 | if (ELF32_R_TYPE (rel->r_info) == R_390_PC16 |
| 1378 | || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL |
| 1379 | || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL |
| 1380 | || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL |
| 1381 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL |
| 1382 | || ELF32_R_TYPE (rel->r_info) == R_390_PC32) |
| 1383 | p->pc_count += 1; |
| 1384 | } |
| 1385 | break; |
| 1386 | |
| 1387 | /* This relocation describes the C++ object vtable hierarchy. |
| 1388 | Reconstruct it for later use during GC. */ |
| 1389 | case R_390_GNU_VTINHERIT: |
| 1390 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 1391 | return FALSE; |
| 1392 | break; |
| 1393 | |
| 1394 | /* This relocation describes which C++ vtable entries are actually |
| 1395 | used. Record for later use during GC. */ |
| 1396 | case R_390_GNU_VTENTRY: |
| 1397 | BFD_ASSERT (h != NULL); |
| 1398 | if (h != NULL |
| 1399 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 1400 | return FALSE; |
| 1401 | break; |
| 1402 | |
| 1403 | default: |
| 1404 | break; |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | return TRUE; |
| 1409 | } |
| 1410 | |
| 1411 | /* Return the section that should be marked against GC for a given |
| 1412 | relocation. */ |
| 1413 | |
| 1414 | static asection * |
| 1415 | elf_s390_gc_mark_hook (asection *sec, |
| 1416 | struct bfd_link_info *info, |
| 1417 | Elf_Internal_Rela *rel, |
| 1418 | struct elf_link_hash_entry *h, |
| 1419 | Elf_Internal_Sym *sym) |
| 1420 | { |
| 1421 | if (h != NULL) |
| 1422 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1423 | { |
| 1424 | case R_390_GNU_VTINHERIT: |
| 1425 | case R_390_GNU_VTENTRY: |
| 1426 | return NULL; |
| 1427 | } |
| 1428 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 1429 | |
| 1430 | } |
| 1431 | |
| 1432 | /* Update the got entry reference counts for the section being removed. */ |
| 1433 | |
| 1434 | static bfd_boolean |
| 1435 | elf_s390_gc_sweep_hook (bfd *abfd, |
| 1436 | struct bfd_link_info *info, |
| 1437 | asection *sec, |
| 1438 | const Elf_Internal_Rela *relocs) |
| 1439 | { |
| 1440 | struct elf_s390_link_hash_table *htab; |
| 1441 | Elf_Internal_Shdr *symtab_hdr; |
| 1442 | struct elf_link_hash_entry **sym_hashes; |
| 1443 | bfd_signed_vma *local_got_refcounts; |
| 1444 | const Elf_Internal_Rela *rel, *relend; |
| 1445 | |
| 1446 | if (bfd_link_relocatable (info)) |
| 1447 | return TRUE; |
| 1448 | |
| 1449 | htab = elf_s390_hash_table (info); |
| 1450 | if (htab == NULL) |
| 1451 | return FALSE; |
| 1452 | |
| 1453 | elf_section_data (sec)->local_dynrel = NULL; |
| 1454 | |
| 1455 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 1456 | sym_hashes = elf_sym_hashes (abfd); |
| 1457 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1458 | |
| 1459 | relend = relocs + sec->reloc_count; |
| 1460 | for (rel = relocs; rel < relend; rel++) |
| 1461 | { |
| 1462 | unsigned long r_symndx; |
| 1463 | unsigned int r_type; |
| 1464 | struct elf_link_hash_entry *h = NULL; |
| 1465 | |
| 1466 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1467 | if (r_symndx >= symtab_hdr->sh_info) |
| 1468 | { |
| 1469 | struct elf_s390_link_hash_entry *eh; |
| 1470 | struct elf_dyn_relocs **pp; |
| 1471 | struct elf_dyn_relocs *p; |
| 1472 | |
| 1473 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1474 | while (h->root.type == bfd_link_hash_indirect |
| 1475 | || h->root.type == bfd_link_hash_warning) |
| 1476 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1477 | eh = (struct elf_s390_link_hash_entry *) h; |
| 1478 | |
| 1479 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 1480 | if (p->sec == sec) |
| 1481 | { |
| 1482 | /* Everything must go for SEC. */ |
| 1483 | *pp = p->next; |
| 1484 | break; |
| 1485 | } |
| 1486 | } |
| 1487 | else |
| 1488 | { |
| 1489 | Elf_Internal_Sym *isym; |
| 1490 | |
| 1491 | /* A local symbol. */ |
| 1492 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 1493 | abfd, r_symndx); |
| 1494 | if (isym == NULL) |
| 1495 | return FALSE; |
| 1496 | |
| 1497 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 1498 | { |
| 1499 | struct plt_entry *plt = elf_s390_local_plt (abfd); |
| 1500 | if (plt[r_symndx].plt.refcount > 0) |
| 1501 | plt[r_symndx].plt.refcount--; |
| 1502 | } |
| 1503 | } |
| 1504 | |
| 1505 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1506 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); |
| 1507 | switch (r_type) |
| 1508 | { |
| 1509 | case R_390_TLS_LDM32: |
| 1510 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) |
| 1511 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; |
| 1512 | break; |
| 1513 | |
| 1514 | case R_390_GOTOFF16: |
| 1515 | case R_390_GOTOFF32: |
| 1516 | if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular) |
| 1517 | { |
| 1518 | h->plt.refcount--; |
| 1519 | break; |
| 1520 | } |
| 1521 | |
| 1522 | case R_390_GOTPC: |
| 1523 | case R_390_GOTPCDBL: |
| 1524 | break; |
| 1525 | |
| 1526 | case R_390_TLS_GD32: |
| 1527 | case R_390_TLS_IE32: |
| 1528 | case R_390_TLS_GOTIE12: |
| 1529 | case R_390_TLS_GOTIE20: |
| 1530 | case R_390_TLS_GOTIE32: |
| 1531 | case R_390_TLS_IEENT: |
| 1532 | case R_390_GOT12: |
| 1533 | case R_390_GOT16: |
| 1534 | case R_390_GOT20: |
| 1535 | case R_390_GOT32: |
| 1536 | case R_390_GOTENT: |
| 1537 | if (h != NULL) |
| 1538 | { |
| 1539 | if (h->got.refcount > 0) |
| 1540 | h->got.refcount -= 1; |
| 1541 | } |
| 1542 | else if (local_got_refcounts != NULL) |
| 1543 | { |
| 1544 | if (local_got_refcounts[r_symndx] > 0) |
| 1545 | local_got_refcounts[r_symndx] -= 1; |
| 1546 | } |
| 1547 | break; |
| 1548 | |
| 1549 | case R_390_8: |
| 1550 | case R_390_12: |
| 1551 | case R_390_16: |
| 1552 | case R_390_20: |
| 1553 | case R_390_32: |
| 1554 | case R_390_PC16: |
| 1555 | case R_390_PC12DBL: |
| 1556 | case R_390_PC16DBL: |
| 1557 | case R_390_PC24DBL: |
| 1558 | case R_390_PC32DBL: |
| 1559 | case R_390_PC32: |
| 1560 | if (bfd_link_pic (info)) |
| 1561 | break; |
| 1562 | /* Fall through. */ |
| 1563 | |
| 1564 | case R_390_PLT12DBL: |
| 1565 | case R_390_PLT16DBL: |
| 1566 | case R_390_PLT24DBL: |
| 1567 | case R_390_PLT32DBL: |
| 1568 | case R_390_PLT32: |
| 1569 | case R_390_PLTOFF16: |
| 1570 | case R_390_PLTOFF32: |
| 1571 | if (h != NULL) |
| 1572 | { |
| 1573 | if (h->plt.refcount > 0) |
| 1574 | h->plt.refcount -= 1; |
| 1575 | } |
| 1576 | break; |
| 1577 | |
| 1578 | case R_390_GOTPLT12: |
| 1579 | case R_390_GOTPLT16: |
| 1580 | case R_390_GOTPLT20: |
| 1581 | case R_390_GOTPLT32: |
| 1582 | case R_390_GOTPLTENT: |
| 1583 | if (h != NULL) |
| 1584 | { |
| 1585 | if (h->plt.refcount > 0) |
| 1586 | { |
| 1587 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; |
| 1588 | h->plt.refcount -= 1; |
| 1589 | } |
| 1590 | } |
| 1591 | else if (local_got_refcounts != NULL) |
| 1592 | { |
| 1593 | if (local_got_refcounts[r_symndx] > 0) |
| 1594 | local_got_refcounts[r_symndx] -= 1; |
| 1595 | } |
| 1596 | break; |
| 1597 | |
| 1598 | default: |
| 1599 | break; |
| 1600 | } |
| 1601 | } |
| 1602 | |
| 1603 | return TRUE; |
| 1604 | } |
| 1605 | |
| 1606 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
| 1607 | entry but we found we will not create any. Called when we find we will |
| 1608 | not have any PLT for this symbol, by for example |
| 1609 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, |
| 1610 | or elf_s390_size_dynamic_sections if no dynamic sections will be |
| 1611 | created (we're only linking static objects). */ |
| 1612 | |
| 1613 | static void |
| 1614 | elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h) |
| 1615 | { |
| 1616 | if (h->elf.root.type == bfd_link_hash_warning) |
| 1617 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; |
| 1618 | |
| 1619 | if (h->gotplt_refcount <= 0) |
| 1620 | return; |
| 1621 | |
| 1622 | /* We simply add the number of gotplt references to the number |
| 1623 | * of got references for this symbol. */ |
| 1624 | h->elf.got.refcount += h->gotplt_refcount; |
| 1625 | h->gotplt_refcount = -1; |
| 1626 | } |
| 1627 | |
| 1628 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1629 | regular object. The current definition is in some section of the |
| 1630 | dynamic object, but we're not including those sections. We have to |
| 1631 | change the definition to something the rest of the link can |
| 1632 | understand. */ |
| 1633 | |
| 1634 | static bfd_boolean |
| 1635 | elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 1636 | struct elf_link_hash_entry *h) |
| 1637 | { |
| 1638 | struct elf_s390_link_hash_table *htab; |
| 1639 | asection *s; |
| 1640 | |
| 1641 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
| 1642 | if (s390_is_ifunc_symbol_p (h)) |
| 1643 | { |
| 1644 | /* All local STT_GNU_IFUNC references must be treated as local |
| 1645 | calls via local PLT. */ |
| 1646 | if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h)) |
| 1647 | { |
| 1648 | bfd_size_type pc_count = 0, count = 0; |
| 1649 | struct elf_dyn_relocs **pp; |
| 1650 | struct elf_s390_link_hash_entry *eh; |
| 1651 | struct elf_dyn_relocs *p; |
| 1652 | |
| 1653 | eh = (struct elf_s390_link_hash_entry *) h; |
| 1654 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 1655 | { |
| 1656 | pc_count += p->pc_count; |
| 1657 | p->count -= p->pc_count; |
| 1658 | p->pc_count = 0; |
| 1659 | count += p->count; |
| 1660 | if (p->count == 0) |
| 1661 | *pp = p->next; |
| 1662 | else |
| 1663 | pp = &p->next; |
| 1664 | } |
| 1665 | |
| 1666 | if (pc_count || count) |
| 1667 | { |
| 1668 | h->needs_plt = 1; |
| 1669 | h->non_got_ref = 1; |
| 1670 | if (h->plt.refcount <= 0) |
| 1671 | h->plt.refcount = 1; |
| 1672 | else |
| 1673 | h->plt.refcount += 1; |
| 1674 | } |
| 1675 | } |
| 1676 | |
| 1677 | if (h->plt.refcount <= 0) |
| 1678 | { |
| 1679 | h->plt.offset = (bfd_vma) -1; |
| 1680 | h->needs_plt = 0; |
| 1681 | } |
| 1682 | return TRUE; |
| 1683 | } |
| 1684 | |
| 1685 | /* If this is a function, put it in the procedure linkage table. We |
| 1686 | will fill in the contents of the procedure linkage table later |
| 1687 | (although we could actually do it here). */ |
| 1688 | if (h->type == STT_FUNC |
| 1689 | || h->needs_plt) |
| 1690 | { |
| 1691 | if (h->plt.refcount <= 0 |
| 1692 | || SYMBOL_CALLS_LOCAL (info, h) |
| 1693 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 1694 | && h->root.type != bfd_link_hash_undefweak)) |
| 1695 | { |
| 1696 | /* This case can occur if we saw a PLT32 reloc in an input |
| 1697 | file, but the symbol was never referred to by a dynamic |
| 1698 | object, or if all references were garbage collected. In |
| 1699 | such a case, we don't actually need to build a procedure |
| 1700 | linkage table, and we can just do a PC32 reloc instead. */ |
| 1701 | h->plt.offset = (bfd_vma) -1; |
| 1702 | h->needs_plt = 0; |
| 1703 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| 1704 | } |
| 1705 | |
| 1706 | return TRUE; |
| 1707 | } |
| 1708 | else |
| 1709 | /* It's possible that we incorrectly decided a .plt reloc was |
| 1710 | needed for an R_390_PC32 reloc to a non-function sym in |
| 1711 | check_relocs. We can't decide accurately between function and |
| 1712 | non-function syms in check-relocs; Objects loaded later in |
| 1713 | the link may change h->type. So fix it now. */ |
| 1714 | h->plt.offset = (bfd_vma) -1; |
| 1715 | |
| 1716 | /* If this is a weak symbol, and there is a real definition, the |
| 1717 | processor independent code will have arranged for us to see the |
| 1718 | real definition first, and we can just use the same value. */ |
| 1719 | if (h->u.weakdef != NULL) |
| 1720 | { |
| 1721 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 1722 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 1723 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 1724 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 1725 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
| 1726 | h->non_got_ref = h->u.weakdef->non_got_ref; |
| 1727 | return TRUE; |
| 1728 | } |
| 1729 | |
| 1730 | /* This is a reference to a symbol defined by a dynamic object which |
| 1731 | is not a function. */ |
| 1732 | |
| 1733 | /* If we are creating a shared library, we must presume that the |
| 1734 | only references to the symbol are via the global offset table. |
| 1735 | For such cases we need not do anything here; the relocations will |
| 1736 | be handled correctly by relocate_section. */ |
| 1737 | if (bfd_link_pic (info)) |
| 1738 | return TRUE; |
| 1739 | |
| 1740 | /* If there are no references to this symbol that do not use the |
| 1741 | GOT, we don't need to generate a copy reloc. */ |
| 1742 | if (!h->non_got_ref) |
| 1743 | return TRUE; |
| 1744 | |
| 1745 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 1746 | if (info->nocopyreloc) |
| 1747 | { |
| 1748 | h->non_got_ref = 0; |
| 1749 | return TRUE; |
| 1750 | } |
| 1751 | |
| 1752 | if (ELIMINATE_COPY_RELOCS) |
| 1753 | { |
| 1754 | struct elf_s390_link_hash_entry * eh; |
| 1755 | struct elf_dyn_relocs *p; |
| 1756 | |
| 1757 | eh = (struct elf_s390_link_hash_entry *) h; |
| 1758 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 1759 | { |
| 1760 | s = p->sec->output_section; |
| 1761 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 1762 | break; |
| 1763 | } |
| 1764 | |
| 1765 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 1766 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 1767 | if (p == NULL) |
| 1768 | { |
| 1769 | h->non_got_ref = 0; |
| 1770 | return TRUE; |
| 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | /* We must allocate the symbol in our .dynbss section, which will |
| 1775 | become part of the .bss section of the executable. There will be |
| 1776 | an entry for this symbol in the .dynsym section. The dynamic |
| 1777 | object will contain position independent code, so all references |
| 1778 | from the dynamic object to this symbol will go through the global |
| 1779 | offset table. The dynamic linker will use the .dynsym entry to |
| 1780 | determine the address it must put in the global offset table, so |
| 1781 | both the dynamic object and the regular object will refer to the |
| 1782 | same memory location for the variable. */ |
| 1783 | |
| 1784 | htab = elf_s390_hash_table (info); |
| 1785 | |
| 1786 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
| 1787 | copy the initial value out of the dynamic object and into the |
| 1788 | runtime process image. */ |
| 1789 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 1790 | { |
| 1791 | htab->srelbss->size += sizeof (Elf32_External_Rela); |
| 1792 | h->needs_copy = 1; |
| 1793 | } |
| 1794 | |
| 1795 | s = htab->sdynbss; |
| 1796 | |
| 1797 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 1798 | } |
| 1799 | |
| 1800 | /* Allocate space in .plt, .got and associated reloc sections for |
| 1801 | dynamic relocs. */ |
| 1802 | |
| 1803 | static bfd_boolean |
| 1804 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| 1805 | { |
| 1806 | struct bfd_link_info *info; |
| 1807 | struct elf_s390_link_hash_table *htab; |
| 1808 | struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; |
| 1809 | struct elf_dyn_relocs *p; |
| 1810 | |
| 1811 | if (h->root.type == bfd_link_hash_indirect) |
| 1812 | return TRUE; |
| 1813 | |
| 1814 | info = (struct bfd_link_info *) inf; |
| 1815 | htab = elf_s390_hash_table (info); |
| 1816 | |
| 1817 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
| 1818 | here if it is defined and referenced in a non-shared object. */ |
| 1819 | if (s390_is_ifunc_symbol_p (h) && h->def_regular) |
| 1820 | return s390_elf_allocate_ifunc_dyn_relocs (info, h); |
| 1821 | else if (htab->elf.dynamic_sections_created |
| 1822 | && h->plt.refcount > 0) |
| 1823 | { |
| 1824 | /* Make sure this symbol is output as a dynamic symbol. |
| 1825 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1826 | if (h->dynindx == -1 |
| 1827 | && !h->forced_local) |
| 1828 | { |
| 1829 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1830 | return FALSE; |
| 1831 | } |
| 1832 | |
| 1833 | if (bfd_link_pic (info) |
| 1834 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 1835 | { |
| 1836 | asection *s = htab->elf.splt; |
| 1837 | |
| 1838 | /* If this is the first .plt entry, make room for the special |
| 1839 | first entry. */ |
| 1840 | if (s->size == 0) |
| 1841 | s->size += PLT_FIRST_ENTRY_SIZE; |
| 1842 | |
| 1843 | h->plt.offset = s->size; |
| 1844 | |
| 1845 | /* If this symbol is not defined in a regular file, and we are |
| 1846 | not generating a shared library, then set the symbol to this |
| 1847 | location in the .plt. This is required to make function |
| 1848 | pointers compare as equal between the normal executable and |
| 1849 | the shared library. */ |
| 1850 | if (! bfd_link_pic (info) |
| 1851 | && !h->def_regular) |
| 1852 | { |
| 1853 | h->root.u.def.section = s; |
| 1854 | h->root.u.def.value = h->plt.offset; |
| 1855 | } |
| 1856 | |
| 1857 | /* Make room for this entry. */ |
| 1858 | s->size += PLT_ENTRY_SIZE; |
| 1859 | |
| 1860 | /* We also need to make an entry in the .got.plt section, which |
| 1861 | will be placed in the .got section by the linker script. */ |
| 1862 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
| 1863 | |
| 1864 | /* We also need to make an entry in the .rela.plt section. */ |
| 1865 | htab->elf.srelplt->size += sizeof (Elf32_External_Rela); |
| 1866 | } |
| 1867 | else |
| 1868 | { |
| 1869 | h->plt.offset = (bfd_vma) -1; |
| 1870 | h->needs_plt = 0; |
| 1871 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| 1872 | } |
| 1873 | } |
| 1874 | else |
| 1875 | { |
| 1876 | h->plt.offset = (bfd_vma) -1; |
| 1877 | h->needs_plt = 0; |
| 1878 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
| 1879 | } |
| 1880 | |
| 1881 | /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to |
| 1882 | the binary, we can optimize a bit. IE32 and GOTIE32 get converted |
| 1883 | to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT |
| 1884 | we can save the dynamic TLS relocation. */ |
| 1885 | if (h->got.refcount > 0 |
| 1886 | && !bfd_link_pic (info) |
| 1887 | && h->dynindx == -1 |
| 1888 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) |
| 1889 | { |
| 1890 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) |
| 1891 | /* For the GOTIE access without a literal pool entry the offset has |
| 1892 | to be stored somewhere. The immediate value in the instruction |
| 1893 | is not bit enough so the value is stored in the got. */ |
| 1894 | { |
| 1895 | h->got.offset = htab->elf.sgot->size; |
| 1896 | htab->elf.sgot->size += GOT_ENTRY_SIZE; |
| 1897 | } |
| 1898 | else |
| 1899 | h->got.offset = (bfd_vma) -1; |
| 1900 | } |
| 1901 | else if (h->got.refcount > 0) |
| 1902 | { |
| 1903 | asection *s; |
| 1904 | bfd_boolean dyn; |
| 1905 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
| 1906 | |
| 1907 | /* Make sure this symbol is output as a dynamic symbol. |
| 1908 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1909 | if (h->dynindx == -1 |
| 1910 | && !h->forced_local) |
| 1911 | { |
| 1912 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1913 | return FALSE; |
| 1914 | } |
| 1915 | |
| 1916 | s = htab->elf.sgot; |
| 1917 | h->got.offset = s->size; |
| 1918 | s->size += GOT_ENTRY_SIZE; |
| 1919 | /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */ |
| 1920 | if (tls_type == GOT_TLS_GD) |
| 1921 | s->size += GOT_ENTRY_SIZE; |
| 1922 | dyn = htab->elf.dynamic_sections_created; |
| 1923 | /* R_390_TLS_IE32 needs one dynamic relocation, |
| 1924 | R_390_TLS_GD32 needs one if local symbol and two if global. */ |
| 1925 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) |
| 1926 | || tls_type >= GOT_TLS_IE) |
| 1927 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 1928 | else if (tls_type == GOT_TLS_GD) |
| 1929 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela); |
| 1930 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 1931 | || h->root.type != bfd_link_hash_undefweak) |
| 1932 | && (bfd_link_pic (info) |
| 1933 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 1934 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 1935 | } |
| 1936 | else |
| 1937 | h->got.offset = (bfd_vma) -1; |
| 1938 | |
| 1939 | if (eh->dyn_relocs == NULL) |
| 1940 | return TRUE; |
| 1941 | |
| 1942 | /* In the shared -Bsymbolic case, discard space allocated for |
| 1943 | dynamic pc-relative relocs against symbols which turn out to be |
| 1944 | defined in regular objects. For the normal shared case, discard |
| 1945 | space for pc-relative relocs that have become local due to symbol |
| 1946 | visibility changes. */ |
| 1947 | |
| 1948 | if (bfd_link_pic (info)) |
| 1949 | { |
| 1950 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 1951 | { |
| 1952 | struct elf_dyn_relocs **pp; |
| 1953 | |
| 1954 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 1955 | { |
| 1956 | p->count -= p->pc_count; |
| 1957 | p->pc_count = 0; |
| 1958 | if (p->count == 0) |
| 1959 | *pp = p->next; |
| 1960 | else |
| 1961 | pp = &p->next; |
| 1962 | } |
| 1963 | } |
| 1964 | |
| 1965 | /* Also discard relocs on undefined weak syms with non-default |
| 1966 | visibility. */ |
| 1967 | if (eh->dyn_relocs != NULL |
| 1968 | && h->root.type == bfd_link_hash_undefweak) |
| 1969 | { |
| 1970 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 1971 | eh->dyn_relocs = NULL; |
| 1972 | |
| 1973 | /* Make sure undefined weak symbols are output as a dynamic |
| 1974 | symbol in PIEs. */ |
| 1975 | else if (h->dynindx == -1 |
| 1976 | && !h->forced_local) |
| 1977 | { |
| 1978 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1979 | return FALSE; |
| 1980 | } |
| 1981 | } |
| 1982 | } |
| 1983 | else if (ELIMINATE_COPY_RELOCS) |
| 1984 | { |
| 1985 | /* For the non-shared case, discard space for relocs against |
| 1986 | symbols which turn out to need copy relocs or are not |
| 1987 | dynamic. */ |
| 1988 | |
| 1989 | if (!h->non_got_ref |
| 1990 | && ((h->def_dynamic |
| 1991 | && !h->def_regular) |
| 1992 | || (htab->elf.dynamic_sections_created |
| 1993 | && (h->root.type == bfd_link_hash_undefweak |
| 1994 | || h->root.type == bfd_link_hash_undefined)))) |
| 1995 | { |
| 1996 | /* Make sure this symbol is output as a dynamic symbol. |
| 1997 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1998 | if (h->dynindx == -1 |
| 1999 | && !h->forced_local) |
| 2000 | { |
| 2001 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 2002 | return FALSE; |
| 2003 | } |
| 2004 | |
| 2005 | /* If that succeeded, we know we'll be keeping all the |
| 2006 | relocs. */ |
| 2007 | if (h->dynindx != -1) |
| 2008 | goto keep; |
| 2009 | } |
| 2010 | |
| 2011 | eh->dyn_relocs = NULL; |
| 2012 | |
| 2013 | keep: ; |
| 2014 | } |
| 2015 | |
| 2016 | /* Finally, allocate space. */ |
| 2017 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 2018 | { |
| 2019 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 2020 | |
| 2021 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 2022 | } |
| 2023 | |
| 2024 | return TRUE; |
| 2025 | } |
| 2026 | |
| 2027 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 2028 | |
| 2029 | static bfd_boolean |
| 2030 | readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| 2031 | { |
| 2032 | struct elf_s390_link_hash_entry *eh; |
| 2033 | struct elf_dyn_relocs *p; |
| 2034 | |
| 2035 | eh = (struct elf_s390_link_hash_entry *) h; |
| 2036 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 2037 | { |
| 2038 | asection *s = p->sec->output_section; |
| 2039 | |
| 2040 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 2041 | { |
| 2042 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 2043 | |
| 2044 | info->flags |= DF_TEXTREL; |
| 2045 | |
| 2046 | /* Not an error, just cut short the traversal. */ |
| 2047 | return FALSE; |
| 2048 | } |
| 2049 | } |
| 2050 | return TRUE; |
| 2051 | } |
| 2052 | |
| 2053 | /* Set the sizes of the dynamic sections. */ |
| 2054 | |
| 2055 | static bfd_boolean |
| 2056 | elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 2057 | struct bfd_link_info *info) |
| 2058 | { |
| 2059 | struct elf_s390_link_hash_table *htab; |
| 2060 | bfd *dynobj; |
| 2061 | asection *s; |
| 2062 | bfd_boolean relocs; |
| 2063 | bfd *ibfd; |
| 2064 | |
| 2065 | htab = elf_s390_hash_table (info); |
| 2066 | dynobj = htab->elf.dynobj; |
| 2067 | if (dynobj == NULL) |
| 2068 | abort (); |
| 2069 | |
| 2070 | if (htab->elf.dynamic_sections_created) |
| 2071 | { |
| 2072 | /* Set the contents of the .interp section to the interpreter. */ |
| 2073 | if (bfd_link_executable (info) && !info->nointerp) |
| 2074 | { |
| 2075 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 2076 | if (s == NULL) |
| 2077 | abort (); |
| 2078 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2079 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2080 | } |
| 2081 | } |
| 2082 | |
| 2083 | /* Set up .got offsets for local syms, and space for local dynamic |
| 2084 | relocs. */ |
| 2085 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 2086 | { |
| 2087 | bfd_signed_vma *local_got; |
| 2088 | bfd_signed_vma *end_local_got; |
| 2089 | char *local_tls_type; |
| 2090 | bfd_size_type locsymcount; |
| 2091 | Elf_Internal_Shdr *symtab_hdr; |
| 2092 | asection *srela; |
| 2093 | struct plt_entry *local_plt; |
| 2094 | unsigned int i; |
| 2095 | |
| 2096 | if (! is_s390_elf (ibfd)) |
| 2097 | continue; |
| 2098 | |
| 2099 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 2100 | { |
| 2101 | struct elf_dyn_relocs *p; |
| 2102 | |
| 2103 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
| 2104 | { |
| 2105 | if (!bfd_is_abs_section (p->sec) |
| 2106 | && bfd_is_abs_section (p->sec->output_section)) |
| 2107 | { |
| 2108 | /* Input section has been discarded, either because |
| 2109 | it is a copy of a linkonce section or due to |
| 2110 | linker script /DISCARD/, so we'll be discarding |
| 2111 | the relocs too. */ |
| 2112 | } |
| 2113 | else if (p->count != 0) |
| 2114 | { |
| 2115 | srela = elf_section_data (p->sec)->sreloc; |
| 2116 | srela->size += p->count * sizeof (Elf32_External_Rela); |
| 2117 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 2118 | info->flags |= DF_TEXTREL; |
| 2119 | } |
| 2120 | } |
| 2121 | } |
| 2122 | |
| 2123 | local_got = elf_local_got_refcounts (ibfd); |
| 2124 | if (!local_got) |
| 2125 | continue; |
| 2126 | |
| 2127 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 2128 | locsymcount = symtab_hdr->sh_info; |
| 2129 | end_local_got = local_got + locsymcount; |
| 2130 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
| 2131 | s = htab->elf.sgot; |
| 2132 | srela = htab->elf.srelgot; |
| 2133 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
| 2134 | { |
| 2135 | if (*local_got > 0) |
| 2136 | { |
| 2137 | *local_got = s->size; |
| 2138 | s->size += GOT_ENTRY_SIZE; |
| 2139 | if (*local_tls_type == GOT_TLS_GD) |
| 2140 | s->size += GOT_ENTRY_SIZE; |
| 2141 | if (bfd_link_pic (info)) |
| 2142 | srela->size += sizeof (Elf32_External_Rela); |
| 2143 | } |
| 2144 | else |
| 2145 | *local_got = (bfd_vma) -1; |
| 2146 | } |
| 2147 | local_plt = elf_s390_local_plt (ibfd); |
| 2148 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 2149 | { |
| 2150 | if (local_plt[i].plt.refcount > 0) |
| 2151 | { |
| 2152 | local_plt[i].plt.offset = htab->elf.iplt->size; |
| 2153 | htab->elf.iplt->size += PLT_ENTRY_SIZE; |
| 2154 | htab->elf.igotplt->size += GOT_ENTRY_SIZE; |
| 2155 | htab->elf.irelplt->size += RELA_ENTRY_SIZE; |
| 2156 | } |
| 2157 | else |
| 2158 | local_plt[i].plt.offset = (bfd_vma) -1; |
| 2159 | } |
| 2160 | } |
| 2161 | |
| 2162 | if (htab->tls_ldm_got.refcount > 0) |
| 2163 | { |
| 2164 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32 |
| 2165 | relocs. */ |
| 2166 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
| 2167 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; |
| 2168 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 2169 | } |
| 2170 | else |
| 2171 | htab->tls_ldm_got.offset = -1; |
| 2172 | |
| 2173 | /* Allocate global sym .plt and .got entries, and space for global |
| 2174 | sym dynamic relocs. */ |
| 2175 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); |
| 2176 | |
| 2177 | /* We now have determined the sizes of the various dynamic sections. |
| 2178 | Allocate memory for them. */ |
| 2179 | relocs = FALSE; |
| 2180 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2181 | { |
| 2182 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 2183 | continue; |
| 2184 | |
| 2185 | if (s == htab->elf.splt |
| 2186 | || s == htab->elf.sgot |
| 2187 | || s == htab->elf.sgotplt |
| 2188 | || s == htab->sdynbss |
| 2189 | || s == htab->elf.iplt |
| 2190 | || s == htab->elf.igotplt |
| 2191 | || s == htab->irelifunc) |
| 2192 | { |
| 2193 | /* Strip this section if we don't need it; see the |
| 2194 | comment below. */ |
| 2195 | } |
| 2196 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| 2197 | { |
| 2198 | if (s->size != 0) |
| 2199 | relocs = TRUE; |
| 2200 | |
| 2201 | /* We use the reloc_count field as a counter if we need |
| 2202 | to copy relocs into the output file. */ |
| 2203 | s->reloc_count = 0; |
| 2204 | } |
| 2205 | else |
| 2206 | { |
| 2207 | /* It's not one of our sections, so don't allocate space. */ |
| 2208 | continue; |
| 2209 | } |
| 2210 | |
| 2211 | if (s->size == 0) |
| 2212 | { |
| 2213 | /* If we don't need this section, strip it from the |
| 2214 | output file. This is to handle .rela.bss and |
| 2215 | .rela.plt. We must create it in |
| 2216 | create_dynamic_sections, because it must be created |
| 2217 | before the linker maps input sections to output |
| 2218 | sections. The linker does that before |
| 2219 | adjust_dynamic_symbol is called, and it is that |
| 2220 | function which decides whether anything needs to go |
| 2221 | into these sections. */ |
| 2222 | |
| 2223 | s->flags |= SEC_EXCLUDE; |
| 2224 | continue; |
| 2225 | } |
| 2226 | |
| 2227 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 2228 | continue; |
| 2229 | |
| 2230 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 2231 | here in case unused entries are not reclaimed before the |
| 2232 | section's contents are written out. This should not happen, |
| 2233 | but this way if it does, we get a R_390_NONE reloc instead |
| 2234 | of garbage. */ |
| 2235 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 2236 | if (s->contents == NULL) |
| 2237 | return FALSE; |
| 2238 | } |
| 2239 | |
| 2240 | if (htab->elf.dynamic_sections_created) |
| 2241 | { |
| 2242 | /* Add some entries to the .dynamic section. We fill in the |
| 2243 | values later, in elf_s390_finish_dynamic_sections, but we |
| 2244 | must add the entries now so that we get the correct size for |
| 2245 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2246 | dynamic linker and used by the debugger. */ |
| 2247 | #define add_dynamic_entry(TAG, VAL) \ |
| 2248 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 2249 | |
| 2250 | if (bfd_link_executable (info)) |
| 2251 | { |
| 2252 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 2253 | return FALSE; |
| 2254 | } |
| 2255 | |
| 2256 | if (htab->elf.splt->size != 0) |
| 2257 | { |
| 2258 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 2259 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 2260 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 2261 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 2262 | return FALSE; |
| 2263 | } |
| 2264 | |
| 2265 | if (relocs) |
| 2266 | { |
| 2267 | if (!add_dynamic_entry (DT_RELA, 0) |
| 2268 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 2269 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 2270 | return FALSE; |
| 2271 | |
| 2272 | /* If any dynamic relocs apply to a read-only section, |
| 2273 | then we need a DT_TEXTREL entry. */ |
| 2274 | if ((info->flags & DF_TEXTREL) == 0) |
| 2275 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); |
| 2276 | |
| 2277 | if ((info->flags & DF_TEXTREL) != 0) |
| 2278 | { |
| 2279 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 2280 | return FALSE; |
| 2281 | } |
| 2282 | } |
| 2283 | } |
| 2284 | #undef add_dynamic_entry |
| 2285 | |
| 2286 | return TRUE; |
| 2287 | } |
| 2288 | |
| 2289 | /* Return the base VMA address which should be subtracted from real addresses |
| 2290 | when resolving @dtpoff relocation. |
| 2291 | This is PT_TLS segment p_vaddr. */ |
| 2292 | |
| 2293 | static bfd_vma |
| 2294 | dtpoff_base (struct bfd_link_info *info) |
| 2295 | { |
| 2296 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2297 | if (elf_hash_table (info)->tls_sec == NULL) |
| 2298 | return 0; |
| 2299 | return elf_hash_table (info)->tls_sec->vma; |
| 2300 | } |
| 2301 | |
| 2302 | /* Return the relocation value for @tpoff relocation |
| 2303 | if STT_TLS virtual address is ADDRESS. */ |
| 2304 | |
| 2305 | static bfd_vma |
| 2306 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 2307 | { |
| 2308 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 2309 | |
| 2310 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2311 | if (htab->tls_sec == NULL) |
| 2312 | return 0; |
| 2313 | return htab->tls_size + htab->tls_sec->vma - address; |
| 2314 | } |
| 2315 | |
| 2316 | /* Complain if TLS instruction relocation is against an invalid |
| 2317 | instruction. */ |
| 2318 | |
| 2319 | static void |
| 2320 | invalid_tls_insn (bfd *input_bfd, |
| 2321 | asection *input_section, |
| 2322 | Elf_Internal_Rela *rel) |
| 2323 | { |
| 2324 | reloc_howto_type *howto; |
| 2325 | |
| 2326 | howto = elf_howto_table + ELF32_R_TYPE (rel->r_info); |
| 2327 | _bfd_error_handler |
| 2328 | /* xgettext:c-format */ |
| 2329 | (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), |
| 2330 | input_bfd, |
| 2331 | input_section, |
| 2332 | (long) rel->r_offset, |
| 2333 | howto->name); |
| 2334 | bfd_set_error (bfd_error_bad_value); |
| 2335 | } |
| 2336 | |
| 2337 | /* Relocate a 390 ELF section. */ |
| 2338 | |
| 2339 | static bfd_boolean |
| 2340 | elf_s390_relocate_section (bfd *output_bfd, |
| 2341 | struct bfd_link_info *info, |
| 2342 | bfd *input_bfd, |
| 2343 | asection *input_section, |
| 2344 | bfd_byte *contents, |
| 2345 | Elf_Internal_Rela *relocs, |
| 2346 | Elf_Internal_Sym *local_syms, |
| 2347 | asection **local_sections) |
| 2348 | { |
| 2349 | struct elf_s390_link_hash_table *htab; |
| 2350 | Elf_Internal_Shdr *symtab_hdr; |
| 2351 | struct elf_link_hash_entry **sym_hashes; |
| 2352 | bfd_vma *local_got_offsets; |
| 2353 | Elf_Internal_Rela *rel; |
| 2354 | Elf_Internal_Rela *relend; |
| 2355 | |
| 2356 | BFD_ASSERT (is_s390_elf (input_bfd)); |
| 2357 | |
| 2358 | htab = elf_s390_hash_table (info); |
| 2359 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 2360 | sym_hashes = elf_sym_hashes (input_bfd); |
| 2361 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 2362 | |
| 2363 | rel = relocs; |
| 2364 | relend = relocs + input_section->reloc_count; |
| 2365 | for (; rel < relend; rel++) |
| 2366 | { |
| 2367 | unsigned int r_type; |
| 2368 | reloc_howto_type *howto; |
| 2369 | unsigned long r_symndx; |
| 2370 | struct elf_link_hash_entry *h; |
| 2371 | Elf_Internal_Sym *sym; |
| 2372 | asection *sec; |
| 2373 | bfd_vma off; |
| 2374 | bfd_vma relocation; |
| 2375 | bfd_boolean unresolved_reloc; |
| 2376 | bfd_reloc_status_type r; |
| 2377 | int tls_type; |
| 2378 | asection *base_got = htab->elf.sgot; |
| 2379 | |
| 2380 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2381 | if (r_type == (int) R_390_GNU_VTINHERIT |
| 2382 | || r_type == (int) R_390_GNU_VTENTRY) |
| 2383 | continue; |
| 2384 | if (r_type >= (int) R_390_max) |
| 2385 | { |
| 2386 | bfd_set_error (bfd_error_bad_value); |
| 2387 | return FALSE; |
| 2388 | } |
| 2389 | |
| 2390 | howto = elf_howto_table + r_type; |
| 2391 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2392 | |
| 2393 | h = NULL; |
| 2394 | sym = NULL; |
| 2395 | sec = NULL; |
| 2396 | unresolved_reloc = FALSE; |
| 2397 | if (r_symndx < symtab_hdr->sh_info) |
| 2398 | { |
| 2399 | sym = local_syms + r_symndx; |
| 2400 | sec = local_sections[r_symndx]; |
| 2401 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 2402 | { |
| 2403 | struct plt_entry *local_plt = elf_s390_local_plt (input_bfd); |
| 2404 | if (local_plt == NULL) |
| 2405 | return FALSE; |
| 2406 | |
| 2407 | /* Address of the PLT slot. */ |
| 2408 | relocation = (htab->elf.iplt->output_section->vma |
| 2409 | + htab->elf.iplt->output_offset |
| 2410 | + local_plt[r_symndx].plt.offset); |
| 2411 | |
| 2412 | switch (r_type) |
| 2413 | { |
| 2414 | case R_390_PLTOFF16: |
| 2415 | case R_390_PLTOFF32: |
| 2416 | relocation -= htab->elf.sgot->output_section->vma; |
| 2417 | break; |
| 2418 | case R_390_GOTPLT12: |
| 2419 | case R_390_GOTPLT16: |
| 2420 | case R_390_GOTPLT20: |
| 2421 | case R_390_GOTPLT32: |
| 2422 | case R_390_GOTPLTENT: |
| 2423 | case R_390_GOT12: |
| 2424 | case R_390_GOT16: |
| 2425 | case R_390_GOT20: |
| 2426 | case R_390_GOT32: |
| 2427 | case R_390_GOTENT: |
| 2428 | { |
| 2429 | /* Write the PLT slot address into the GOT slot. */ |
| 2430 | bfd_put_32 (output_bfd, relocation, |
| 2431 | htab->elf.sgot->contents + |
| 2432 | local_got_offsets[r_symndx]); |
| 2433 | relocation = (local_got_offsets[r_symndx] + |
| 2434 | htab->elf.sgot->output_offset); |
| 2435 | |
| 2436 | if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) |
| 2437 | relocation += htab->elf.sgot->output_section->vma; |
| 2438 | break; |
| 2439 | } |
| 2440 | default: |
| 2441 | break; |
| 2442 | } |
| 2443 | /* The output section is needed later in |
| 2444 | finish_dynamic_section when creating the dynamic |
| 2445 | relocation. */ |
| 2446 | local_plt[r_symndx].sec = sec; |
| 2447 | goto do_relocation; |
| 2448 | } |
| 2449 | else |
| 2450 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 2451 | } |
| 2452 | else |
| 2453 | { |
| 2454 | bfd_boolean warned ATTRIBUTE_UNUSED; |
| 2455 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
| 2456 | |
| 2457 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 2458 | r_symndx, symtab_hdr, sym_hashes, |
| 2459 | h, sec, relocation, |
| 2460 | unresolved_reloc, warned, ignored); |
| 2461 | } |
| 2462 | |
| 2463 | if (sec != NULL && discarded_section (sec)) |
| 2464 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 2465 | rel, 1, relend, howto, 0, contents); |
| 2466 | |
| 2467 | if (bfd_link_relocatable (info)) |
| 2468 | continue; |
| 2469 | |
| 2470 | switch (r_type) |
| 2471 | { |
| 2472 | case R_390_GOTPLT12: |
| 2473 | case R_390_GOTPLT16: |
| 2474 | case R_390_GOTPLT20: |
| 2475 | case R_390_GOTPLT32: |
| 2476 | case R_390_GOTPLTENT: |
| 2477 | /* There are three cases for a GOTPLT relocation. 1) The |
| 2478 | relocation is against the jump slot entry of a plt that |
| 2479 | will get emitted to the output file. 2) The relocation |
| 2480 | is against the jump slot of a plt entry that has been |
| 2481 | removed. elf_s390_adjust_gotplt has created a GOT entry |
| 2482 | as replacement. 3) The relocation is against a local symbol. |
| 2483 | Cases 2) and 3) are the same as the GOT relocation code |
| 2484 | so we just have to test for case 1 and fall through for |
| 2485 | the other two. */ |
| 2486 | if (h != NULL && h->plt.offset != (bfd_vma) -1) |
| 2487 | { |
| 2488 | bfd_vma plt_index; |
| 2489 | |
| 2490 | if (s390_is_ifunc_symbol_p (h)) |
| 2491 | { |
| 2492 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; |
| 2493 | relocation = (plt_index * GOT_ENTRY_SIZE + |
| 2494 | htab->elf.igotplt->output_offset); |
| 2495 | if (r_type == R_390_GOTPLTENT) |
| 2496 | relocation += htab->elf.igotplt->output_section->vma; |
| 2497 | } |
| 2498 | else |
| 2499 | { |
| 2500 | /* Calc. index no. |
| 2501 | Current offset - size first entry / entry size. */ |
| 2502 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / |
| 2503 | PLT_ENTRY_SIZE; |
| 2504 | |
| 2505 | /* Offset in GOT is PLT index plus GOT headers(3) |
| 2506 | times 4, addr & GOT addr. */ |
| 2507 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; |
| 2508 | if (r_type == R_390_GOTPLTENT) |
| 2509 | relocation += htab->elf.sgot->output_section->vma; |
| 2510 | } |
| 2511 | unresolved_reloc = FALSE; |
| 2512 | |
| 2513 | } |
| 2514 | /* Fall through. */ |
| 2515 | |
| 2516 | case R_390_GOT12: |
| 2517 | case R_390_GOT16: |
| 2518 | case R_390_GOT20: |
| 2519 | case R_390_GOT32: |
| 2520 | case R_390_GOTENT: |
| 2521 | /* Relocation is to the entry for this symbol in the global |
| 2522 | offset table. */ |
| 2523 | if (base_got == NULL) |
| 2524 | abort (); |
| 2525 | |
| 2526 | if (h != NULL) |
| 2527 | { |
| 2528 | bfd_boolean dyn; |
| 2529 | |
| 2530 | off = h->got.offset; |
| 2531 | dyn = htab->elf.dynamic_sections_created; |
| 2532 | |
| 2533 | if (s390_is_ifunc_symbol_p (h)) |
| 2534 | { |
| 2535 | BFD_ASSERT (h->plt.offset != (bfd_vma) -1); |
| 2536 | if (off == (bfd_vma)-1) |
| 2537 | { |
| 2538 | /* No explicit GOT usage so redirect to the |
| 2539 | got.iplt slot. */ |
| 2540 | base_got = htab->elf.igotplt; |
| 2541 | off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE; |
| 2542 | } |
| 2543 | else |
| 2544 | { |
| 2545 | /* Explicit GOT slots must contain the address |
| 2546 | of the PLT slot. This will be handled in |
| 2547 | finish_dynamic_symbol. */ |
| 2548 | } |
| 2549 | } |
| 2550 | else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| 2551 | bfd_link_pic (info), |
| 2552 | h) |
| 2553 | || (bfd_link_pic (info) |
| 2554 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 2555 | || (ELF_ST_VISIBILITY (h->other) |
| 2556 | && h->root.type == bfd_link_hash_undefweak)) |
| 2557 | |
| 2558 | { |
| 2559 | /* This is actually a static link, or it is a |
| 2560 | -Bsymbolic link and the symbol is defined |
| 2561 | locally, or the symbol was forced to be local |
| 2562 | because of a version file. We must initialize |
| 2563 | this entry in the global offset table. Since the |
| 2564 | offset must always be a multiple of 2, we use the |
| 2565 | least significant bit to record whether we have |
| 2566 | initialized it already. |
| 2567 | |
| 2568 | When doing a dynamic link, we create a .rel.got |
| 2569 | relocation entry to initialize the value. This |
| 2570 | is done in the finish_dynamic_symbol routine. */ |
| 2571 | if ((off & 1) != 0) |
| 2572 | off &= ~1; |
| 2573 | else |
| 2574 | { |
| 2575 | bfd_put_32 (output_bfd, relocation, |
| 2576 | base_got->contents + off); |
| 2577 | h->got.offset |= 1; |
| 2578 | } |
| 2579 | |
| 2580 | if ((h->def_regular |
| 2581 | && bfd_link_pic (info) |
| 2582 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 2583 | /* lrl rx,sym@GOTENT -> larl rx, sym */ |
| 2584 | && ((r_type == R_390_GOTENT |
| 2585 | && (bfd_get_16 (input_bfd, |
| 2586 | contents + rel->r_offset - 2) |
| 2587 | & 0xff0f) == 0xc40d) |
| 2588 | /* ly rx, sym@GOT(r12) -> larl rx, sym */ |
| 2589 | || (r_type == R_390_GOT20 |
| 2590 | && (bfd_get_32 (input_bfd, |
| 2591 | contents + rel->r_offset - 2) |
| 2592 | & 0xff00f000) == 0xe300c000 |
| 2593 | && bfd_get_8 (input_bfd, |
| 2594 | contents + rel->r_offset + 3) == 0x58))) |
| 2595 | { |
| 2596 | unsigned short new_insn = |
| 2597 | (0xc000 | (bfd_get_8 (input_bfd, |
| 2598 | contents + rel->r_offset - 1) & 0xf0)); |
| 2599 | bfd_put_16 (output_bfd, new_insn, |
| 2600 | contents + rel->r_offset - 2); |
| 2601 | r_type = R_390_PC32DBL; |
| 2602 | rel->r_addend = 2; |
| 2603 | howto = elf_howto_table + r_type; |
| 2604 | relocation = h->root.u.def.value |
| 2605 | + h->root.u.def.section->output_section->vma |
| 2606 | + h->root.u.def.section->output_offset; |
| 2607 | goto do_relocation; |
| 2608 | } |
| 2609 | } |
| 2610 | else |
| 2611 | unresolved_reloc = FALSE; |
| 2612 | } |
| 2613 | else |
| 2614 | { |
| 2615 | if (local_got_offsets == NULL) |
| 2616 | abort (); |
| 2617 | |
| 2618 | off = local_got_offsets[r_symndx]; |
| 2619 | |
| 2620 | /* The offset must always be a multiple of 4. We use |
| 2621 | the least significant bit to record whether we have |
| 2622 | already generated the necessary reloc. */ |
| 2623 | if ((off & 1) != 0) |
| 2624 | off &= ~1; |
| 2625 | else |
| 2626 | { |
| 2627 | bfd_put_32 (output_bfd, relocation, |
| 2628 | htab->elf.sgot->contents + off); |
| 2629 | |
| 2630 | if (bfd_link_pic (info)) |
| 2631 | { |
| 2632 | asection *srelgot; |
| 2633 | Elf_Internal_Rela outrel; |
| 2634 | bfd_byte *loc; |
| 2635 | |
| 2636 | srelgot = htab->elf.srelgot; |
| 2637 | if (srelgot == NULL) |
| 2638 | abort (); |
| 2639 | |
| 2640 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
| 2641 | + htab->elf.sgot->output_offset |
| 2642 | + off); |
| 2643 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); |
| 2644 | outrel.r_addend = relocation; |
| 2645 | loc = srelgot->contents; |
| 2646 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2647 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 2648 | } |
| 2649 | |
| 2650 | local_got_offsets[r_symndx] |= 1; |
| 2651 | } |
| 2652 | } |
| 2653 | |
| 2654 | if (off >= (bfd_vma) -2) |
| 2655 | abort (); |
| 2656 | |
| 2657 | relocation = base_got->output_offset + off; |
| 2658 | |
| 2659 | /* For @GOTENT the relocation is against the offset between |
| 2660 | the instruction and the symbols entry in the GOT and not |
| 2661 | between the start of the GOT and the symbols entry. We |
| 2662 | add the vma of the GOT to get the correct value. */ |
| 2663 | if ( r_type == R_390_GOTENT |
| 2664 | || r_type == R_390_GOTPLTENT) |
| 2665 | relocation += base_got->output_section->vma; |
| 2666 | |
| 2667 | break; |
| 2668 | |
| 2669 | case R_390_GOTOFF16: |
| 2670 | case R_390_GOTOFF32: |
| 2671 | /* Relocation is relative to the start of the global offset |
| 2672 | table. */ |
| 2673 | |
| 2674 | if (h != NULL |
| 2675 | && s390_is_ifunc_symbol_p (h) |
| 2676 | && h->def_regular |
| 2677 | && !bfd_link_executable (info)) |
| 2678 | { |
| 2679 | relocation = (htab->elf.iplt->output_section->vma |
| 2680 | + htab->elf.iplt->output_offset |
| 2681 | + h->plt.offset |
| 2682 | - htab->elf.sgot->output_section->vma); |
| 2683 | goto do_relocation; |
| 2684 | } |
| 2685 | |
| 2686 | /* Note that sgot->output_offset is not involved in this |
| 2687 | calculation. We always want the start of .got. If we |
| 2688 | defined _GLOBAL_OFFSET_TABLE in a different way, as is |
| 2689 | permitted by the ABI, we might have to change this |
| 2690 | calculation. */ |
| 2691 | relocation -= htab->elf.sgot->output_section->vma; |
| 2692 | break; |
| 2693 | |
| 2694 | case R_390_GOTPC: |
| 2695 | case R_390_GOTPCDBL: |
| 2696 | /* Use global offset table as symbol value. */ |
| 2697 | relocation = htab->elf.sgot->output_section->vma; |
| 2698 | unresolved_reloc = FALSE; |
| 2699 | break; |
| 2700 | |
| 2701 | case R_390_PLT12DBL: |
| 2702 | case R_390_PLT16DBL: |
| 2703 | case R_390_PLT24DBL: |
| 2704 | case R_390_PLT32DBL: |
| 2705 | case R_390_PLT32: |
| 2706 | /* Relocation is to the entry for this symbol in the |
| 2707 | procedure linkage table. */ |
| 2708 | |
| 2709 | /* Resolve a PLT32 reloc against a local symbol directly, |
| 2710 | without using the procedure linkage table. */ |
| 2711 | if (h == NULL) |
| 2712 | break; |
| 2713 | |
| 2714 | if (h->plt.offset == (bfd_vma) -1 |
| 2715 | || (htab->elf.splt == NULL && htab->elf.iplt == NULL)) |
| 2716 | { |
| 2717 | /* We didn't make a PLT entry for this symbol. This |
| 2718 | happens when statically linking PIC code, or when |
| 2719 | using -Bsymbolic. */ |
| 2720 | break; |
| 2721 | } |
| 2722 | |
| 2723 | if (s390_is_ifunc_symbol_p (h)) |
| 2724 | relocation = (htab->elf.iplt->output_section->vma |
| 2725 | + htab->elf.iplt->output_offset |
| 2726 | + h->plt.offset); |
| 2727 | else |
| 2728 | relocation = (htab->elf.splt->output_section->vma |
| 2729 | + htab->elf.splt->output_offset |
| 2730 | + h->plt.offset); |
| 2731 | unresolved_reloc = FALSE; |
| 2732 | break; |
| 2733 | |
| 2734 | case R_390_PLTOFF16: |
| 2735 | case R_390_PLTOFF32: |
| 2736 | /* Relocation is to the entry for this symbol in the |
| 2737 | procedure linkage table relative to the start of the GOT. */ |
| 2738 | |
| 2739 | /* For local symbols or if we didn't make a PLT entry for |
| 2740 | this symbol resolve the symbol directly. */ |
| 2741 | if (h == NULL |
| 2742 | || h->plt.offset == (bfd_vma) -1 |
| 2743 | || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h))) |
| 2744 | { |
| 2745 | relocation -= htab->elf.sgot->output_section->vma; |
| 2746 | break; |
| 2747 | } |
| 2748 | |
| 2749 | if (s390_is_ifunc_symbol_p (h)) |
| 2750 | relocation = (htab->elf.iplt->output_section->vma |
| 2751 | + htab->elf.iplt->output_offset |
| 2752 | + h->plt.offset |
| 2753 | - htab->elf.sgot->output_section->vma); |
| 2754 | else |
| 2755 | relocation = (htab->elf.splt->output_section->vma |
| 2756 | + htab->elf.splt->output_offset |
| 2757 | + h->plt.offset |
| 2758 | - htab->elf.sgot->output_section->vma); |
| 2759 | unresolved_reloc = FALSE; |
| 2760 | break; |
| 2761 | |
| 2762 | case R_390_PC16: |
| 2763 | case R_390_PC12DBL: |
| 2764 | case R_390_PC16DBL: |
| 2765 | case R_390_PC24DBL: |
| 2766 | case R_390_PC32DBL: |
| 2767 | case R_390_PC32: |
| 2768 | if (h != NULL |
| 2769 | && s390_is_ifunc_symbol_p (h) |
| 2770 | && h->def_regular |
| 2771 | && !bfd_link_executable (info)) |
| 2772 | { |
| 2773 | /* This will not work our if the function does not |
| 2774 | happen to set up the GOT pointer for some other |
| 2775 | reason. 31 bit PLT entries require r12 to hold the |
| 2776 | GOT pointer. |
| 2777 | FIXME: Implement an errorcheck. |
| 2778 | NOTE: It will work when brasl is not available |
| 2779 | (e.g. with -m31 -march=g5) since a local function |
| 2780 | call then does use GOTOFF which implies r12 being set |
| 2781 | up. */ |
| 2782 | relocation = (htab->elf.iplt->output_section->vma |
| 2783 | + htab->elf.iplt->output_offset |
| 2784 | + h ->plt.offset); |
| 2785 | goto do_relocation; |
| 2786 | } |
| 2787 | /* Fall through. */ |
| 2788 | |
| 2789 | case R_390_8: |
| 2790 | case R_390_16: |
| 2791 | case R_390_32: |
| 2792 | if (h != NULL |
| 2793 | && s390_is_ifunc_symbol_p (h) |
| 2794 | && h->def_regular) |
| 2795 | { |
| 2796 | if (!bfd_link_pic (info) || !h->non_got_ref) |
| 2797 | { |
| 2798 | /* For a non-shared object STT_GNU_IFUNC symbol must |
| 2799 | go through PLT. */ |
| 2800 | relocation = (htab->elf.iplt->output_section->vma |
| 2801 | + htab->elf.iplt->output_offset |
| 2802 | + h ->plt.offset); |
| 2803 | goto do_relocation; |
| 2804 | } |
| 2805 | else |
| 2806 | { |
| 2807 | /* For shared objects a runtime relocation is needed. */ |
| 2808 | |
| 2809 | Elf_Internal_Rela outrel; |
| 2810 | asection *sreloc; |
| 2811 | |
| 2812 | /* Need a dynamic relocation to get the real function |
| 2813 | address. */ |
| 2814 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
| 2815 | info, |
| 2816 | input_section, |
| 2817 | rel->r_offset); |
| 2818 | if (outrel.r_offset == (bfd_vma) -1 |
| 2819 | || outrel.r_offset == (bfd_vma) -2) |
| 2820 | abort (); |
| 2821 | |
| 2822 | outrel.r_offset += (input_section->output_section->vma |
| 2823 | + input_section->output_offset); |
| 2824 | |
| 2825 | if (h->dynindx == -1 |
| 2826 | || h->forced_local |
| 2827 | || bfd_link_executable (info)) |
| 2828 | { |
| 2829 | /* This symbol is resolved locally. */ |
| 2830 | outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE); |
| 2831 | outrel.r_addend = (h->root.u.def.value |
| 2832 | + h->root.u.def.section->output_section->vma |
| 2833 | + h->root.u.def.section->output_offset); |
| 2834 | } |
| 2835 | else |
| 2836 | { |
| 2837 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 2838 | outrel.r_addend = 0; |
| 2839 | } |
| 2840 | |
| 2841 | sreloc = htab->elf.irelifunc; |
| 2842 | elf_append_rela (output_bfd, sreloc, &outrel); |
| 2843 | |
| 2844 | /* If this reloc is against an external symbol, we |
| 2845 | do not want to fiddle with the addend. Otherwise, |
| 2846 | we need to include the symbol value so that it |
| 2847 | becomes an addend for the dynamic reloc. For an |
| 2848 | internal symbol, we have updated addend. */ |
| 2849 | continue; |
| 2850 | } |
| 2851 | } |
| 2852 | |
| 2853 | if ((input_section->flags & SEC_ALLOC) == 0) |
| 2854 | break; |
| 2855 | |
| 2856 | if ((bfd_link_pic (info) |
| 2857 | && (h == NULL |
| 2858 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 2859 | || h->root.type != bfd_link_hash_undefweak) |
| 2860 | && ((r_type != R_390_PC16 |
| 2861 | && r_type != R_390_PC12DBL |
| 2862 | && r_type != R_390_PC16DBL |
| 2863 | && r_type != R_390_PC24DBL |
| 2864 | && r_type != R_390_PC32DBL |
| 2865 | && r_type != R_390_PC32) |
| 2866 | || !SYMBOL_CALLS_LOCAL (info, h))) |
| 2867 | || (ELIMINATE_COPY_RELOCS |
| 2868 | && !bfd_link_pic (info) |
| 2869 | && h != NULL |
| 2870 | && h->dynindx != -1 |
| 2871 | && !h->non_got_ref |
| 2872 | && ((h->def_dynamic |
| 2873 | && !h->def_regular) |
| 2874 | || h->root.type == bfd_link_hash_undefweak |
| 2875 | || h->root.type == bfd_link_hash_undefined))) |
| 2876 | { |
| 2877 | Elf_Internal_Rela outrel; |
| 2878 | bfd_boolean skip, relocate; |
| 2879 | asection *sreloc; |
| 2880 | bfd_byte *loc; |
| 2881 | |
| 2882 | /* When generating a shared object, these relocations |
| 2883 | are copied into the output file to be resolved at run |
| 2884 | time. */ |
| 2885 | |
| 2886 | skip = FALSE; |
| 2887 | relocate = FALSE; |
| 2888 | |
| 2889 | outrel.r_offset = |
| 2890 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 2891 | rel->r_offset); |
| 2892 | if (outrel.r_offset == (bfd_vma) -1) |
| 2893 | skip = TRUE; |
| 2894 | else if (outrel.r_offset == (bfd_vma) -2) |
| 2895 | skip = TRUE, relocate = TRUE; |
| 2896 | outrel.r_offset += (input_section->output_section->vma |
| 2897 | + input_section->output_offset); |
| 2898 | |
| 2899 | if (skip) |
| 2900 | memset (&outrel, 0, sizeof outrel); |
| 2901 | else if (h != NULL |
| 2902 | && h->dynindx != -1 |
| 2903 | && (r_type == R_390_PC16 |
| 2904 | || r_type == R_390_PC12DBL |
| 2905 | || r_type == R_390_PC16DBL |
| 2906 | || r_type == R_390_PC24DBL |
| 2907 | || r_type == R_390_PC32DBL |
| 2908 | || r_type == R_390_PC32 |
| 2909 | || !bfd_link_pic (info) |
| 2910 | || !SYMBOLIC_BIND (info, h) |
| 2911 | || !h->def_regular)) |
| 2912 | { |
| 2913 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 2914 | outrel.r_addend = rel->r_addend; |
| 2915 | } |
| 2916 | else |
| 2917 | { |
| 2918 | /* This symbol is local, or marked to become local. */ |
| 2919 | outrel.r_addend = relocation + rel->r_addend; |
| 2920 | if (r_type == R_390_32) |
| 2921 | { |
| 2922 | relocate = TRUE; |
| 2923 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); |
| 2924 | } |
| 2925 | else |
| 2926 | { |
| 2927 | long sindx; |
| 2928 | |
| 2929 | if (bfd_is_abs_section (sec)) |
| 2930 | sindx = 0; |
| 2931 | else if (sec == NULL || sec->owner == NULL) |
| 2932 | { |
| 2933 | bfd_set_error(bfd_error_bad_value); |
| 2934 | return FALSE; |
| 2935 | } |
| 2936 | else |
| 2937 | { |
| 2938 | asection *osec; |
| 2939 | |
| 2940 | osec = sec->output_section; |
| 2941 | sindx = elf_section_data (osec)->dynindx; |
| 2942 | if (sindx == 0) |
| 2943 | { |
| 2944 | osec = htab->elf.text_index_section; |
| 2945 | sindx = elf_section_data (osec)->dynindx; |
| 2946 | } |
| 2947 | BFD_ASSERT (sindx != 0); |
| 2948 | |
| 2949 | /* We are turning this relocation into one |
| 2950 | against a section symbol, so subtract out |
| 2951 | the output section's address but not the |
| 2952 | offset of the input section in the output |
| 2953 | section. */ |
| 2954 | outrel.r_addend -= osec->vma; |
| 2955 | } |
| 2956 | outrel.r_info = ELF32_R_INFO (sindx, r_type); |
| 2957 | } |
| 2958 | } |
| 2959 | |
| 2960 | sreloc = elf_section_data (input_section)->sreloc; |
| 2961 | if (sreloc == NULL) |
| 2962 | abort (); |
| 2963 | |
| 2964 | loc = sreloc->contents; |
| 2965 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2966 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 2967 | |
| 2968 | /* If this reloc is against an external symbol, we do |
| 2969 | not want to fiddle with the addend. Otherwise, we |
| 2970 | need to include the symbol value so that it becomes |
| 2971 | an addend for the dynamic reloc. */ |
| 2972 | if (! relocate) |
| 2973 | continue; |
| 2974 | } |
| 2975 | break; |
| 2976 | |
| 2977 | /* Relocations for tls literal pool entries. */ |
| 2978 | case R_390_TLS_IE32: |
| 2979 | if (bfd_link_pic (info)) |
| 2980 | { |
| 2981 | Elf_Internal_Rela outrel; |
| 2982 | asection *sreloc; |
| 2983 | bfd_byte *loc; |
| 2984 | |
| 2985 | outrel.r_offset = rel->r_offset |
| 2986 | + input_section->output_section->vma |
| 2987 | + input_section->output_offset; |
| 2988 | outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); |
| 2989 | sreloc = elf_section_data (input_section)->sreloc; |
| 2990 | if (sreloc == NULL) |
| 2991 | abort (); |
| 2992 | loc = sreloc->contents; |
| 2993 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2994 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
| 2995 | } |
| 2996 | /* Fall through. */ |
| 2997 | |
| 2998 | case R_390_TLS_GD32: |
| 2999 | case R_390_TLS_GOTIE32: |
| 3000 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); |
| 3001 | tls_type = GOT_UNKNOWN; |
| 3002 | if (h == NULL && local_got_offsets) |
| 3003 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; |
| 3004 | else if (h != NULL) |
| 3005 | { |
| 3006 | tls_type = elf_s390_hash_entry(h)->tls_type; |
| 3007 | if (!bfd_link_pic (info) |
| 3008 | && h->dynindx == -1 |
| 3009 | && tls_type >= GOT_TLS_IE) |
| 3010 | r_type = R_390_TLS_LE32; |
| 3011 | } |
| 3012 | if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) |
| 3013 | r_type = R_390_TLS_IE32; |
| 3014 | |
| 3015 | if (r_type == R_390_TLS_LE32) |
| 3016 | { |
| 3017 | /* This relocation gets optimized away by the local exec |
| 3018 | access optimization. */ |
| 3019 | BFD_ASSERT (! unresolved_reloc); |
| 3020 | bfd_put_32 (output_bfd, -tpoff (info, relocation), |
| 3021 | contents + rel->r_offset); |
| 3022 | continue; |
| 3023 | } |
| 3024 | |
| 3025 | if (htab->elf.sgot == NULL) |
| 3026 | abort (); |
| 3027 | |
| 3028 | if (h != NULL) |
| 3029 | off = h->got.offset; |
| 3030 | else |
| 3031 | { |
| 3032 | if (local_got_offsets == NULL) |
| 3033 | abort (); |
| 3034 | |
| 3035 | off = local_got_offsets[r_symndx]; |
| 3036 | } |
| 3037 | |
| 3038 | emit_tls_relocs: |
| 3039 | |
| 3040 | if ((off & 1) != 0) |
| 3041 | off &= ~1; |
| 3042 | else |
| 3043 | { |
| 3044 | Elf_Internal_Rela outrel; |
| 3045 | bfd_byte *loc; |
| 3046 | int dr_type, indx; |
| 3047 | |
| 3048 | if (htab->elf.srelgot == NULL) |
| 3049 | abort (); |
| 3050 | |
| 3051 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
| 3052 | + htab->elf.sgot->output_offset + off); |
| 3053 | |
| 3054 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 3055 | if (r_type == R_390_TLS_GD32) |
| 3056 | dr_type = R_390_TLS_DTPMOD; |
| 3057 | else |
| 3058 | dr_type = R_390_TLS_TPOFF; |
| 3059 | if (dr_type == R_390_TLS_TPOFF && indx == 0) |
| 3060 | outrel.r_addend = relocation - dtpoff_base (info); |
| 3061 | else |
| 3062 | outrel.r_addend = 0; |
| 3063 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
| 3064 | loc = htab->elf.srelgot->contents; |
| 3065 | loc += htab->elf.srelgot->reloc_count++ |
| 3066 | * sizeof (Elf32_External_Rela); |
| 3067 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3068 | |
| 3069 | if (r_type == R_390_TLS_GD32) |
| 3070 | { |
| 3071 | if (indx == 0) |
| 3072 | { |
| 3073 | BFD_ASSERT (! unresolved_reloc); |
| 3074 | bfd_put_32 (output_bfd, |
| 3075 | relocation - dtpoff_base (info), |
| 3076 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
| 3077 | } |
| 3078 | else |
| 3079 | { |
| 3080 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); |
| 3081 | outrel.r_offset += GOT_ENTRY_SIZE; |
| 3082 | outrel.r_addend = 0; |
| 3083 | htab->elf.srelgot->reloc_count++; |
| 3084 | loc += sizeof (Elf32_External_Rela); |
| 3085 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3086 | } |
| 3087 | } |
| 3088 | |
| 3089 | if (h != NULL) |
| 3090 | h->got.offset |= 1; |
| 3091 | else |
| 3092 | local_got_offsets[r_symndx] |= 1; |
| 3093 | } |
| 3094 | |
| 3095 | if (off >= (bfd_vma) -2) |
| 3096 | abort (); |
| 3097 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
| 3098 | { |
| 3099 | relocation = htab->elf.sgot->output_offset + off; |
| 3100 | if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) |
| 3101 | relocation += htab->elf.sgot->output_section->vma; |
| 3102 | unresolved_reloc = FALSE; |
| 3103 | } |
| 3104 | else |
| 3105 | { |
| 3106 | bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off, |
| 3107 | contents + rel->r_offset); |
| 3108 | continue; |
| 3109 | } |
| 3110 | break; |
| 3111 | |
| 3112 | case R_390_TLS_GOTIE12: |
| 3113 | case R_390_TLS_GOTIE20: |
| 3114 | case R_390_TLS_IEENT: |
| 3115 | if (h == NULL) |
| 3116 | { |
| 3117 | if (local_got_offsets == NULL) |
| 3118 | abort(); |
| 3119 | off = local_got_offsets[r_symndx]; |
| 3120 | if (bfd_link_pic (info)) |
| 3121 | goto emit_tls_relocs; |
| 3122 | } |
| 3123 | else |
| 3124 | { |
| 3125 | off = h->got.offset; |
| 3126 | tls_type = elf_s390_hash_entry(h)->tls_type; |
| 3127 | if (bfd_link_pic (info) |
| 3128 | || h->dynindx != -1 |
| 3129 | || tls_type < GOT_TLS_IE) |
| 3130 | goto emit_tls_relocs; |
| 3131 | } |
| 3132 | |
| 3133 | if (htab->elf.sgot == NULL) |
| 3134 | abort (); |
| 3135 | |
| 3136 | BFD_ASSERT (! unresolved_reloc); |
| 3137 | bfd_put_32 (output_bfd, -tpoff (info, relocation), |
| 3138 | htab->elf.sgot->contents + off); |
| 3139 | relocation = htab->elf.sgot->output_offset + off; |
| 3140 | if (r_type == R_390_TLS_IEENT) |
| 3141 | relocation += htab->elf.sgot->output_section->vma; |
| 3142 | unresolved_reloc = FALSE; |
| 3143 | break; |
| 3144 | |
| 3145 | case R_390_TLS_LDM32: |
| 3146 | if (! bfd_link_pic (info)) |
| 3147 | /* The literal pool entry this relocation refers to gets ignored |
| 3148 | by the optimized code of the local exec model. Do nothing |
| 3149 | and the value will turn out zero. */ |
| 3150 | continue; |
| 3151 | |
| 3152 | if (htab->elf.sgot == NULL) |
| 3153 | abort (); |
| 3154 | |
| 3155 | off = htab->tls_ldm_got.offset; |
| 3156 | if (off & 1) |
| 3157 | off &= ~1; |
| 3158 | else |
| 3159 | { |
| 3160 | Elf_Internal_Rela outrel; |
| 3161 | bfd_byte *loc; |
| 3162 | |
| 3163 | if (htab->elf.srelgot == NULL) |
| 3164 | abort (); |
| 3165 | |
| 3166 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
| 3167 | + htab->elf.sgot->output_offset + off); |
| 3168 | |
| 3169 | bfd_put_32 (output_bfd, 0, |
| 3170 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
| 3171 | outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); |
| 3172 | outrel.r_addend = 0; |
| 3173 | loc = htab->elf.srelgot->contents; |
| 3174 | loc += htab->elf.srelgot->reloc_count++ |
| 3175 | * sizeof (Elf32_External_Rela); |
| 3176 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3177 | htab->tls_ldm_got.offset |= 1; |
| 3178 | } |
| 3179 | relocation = htab->elf.sgot->output_offset + off; |
| 3180 | unresolved_reloc = FALSE; |
| 3181 | break; |
| 3182 | |
| 3183 | case R_390_TLS_LE32: |
| 3184 | if (bfd_link_dll (info)) |
| 3185 | { |
| 3186 | /* Linking a shared library with non-fpic code requires |
| 3187 | a R_390_TLS_TPOFF relocation. */ |
| 3188 | Elf_Internal_Rela outrel; |
| 3189 | asection *sreloc; |
| 3190 | bfd_byte *loc; |
| 3191 | int indx; |
| 3192 | |
| 3193 | outrel.r_offset = rel->r_offset |
| 3194 | + input_section->output_section->vma |
| 3195 | + input_section->output_offset; |
| 3196 | if (h != NULL && h->dynindx != -1) |
| 3197 | indx = h->dynindx; |
| 3198 | else |
| 3199 | indx = 0; |
| 3200 | outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF); |
| 3201 | if (indx == 0) |
| 3202 | outrel.r_addend = relocation - dtpoff_base (info); |
| 3203 | else |
| 3204 | outrel.r_addend = 0; |
| 3205 | sreloc = elf_section_data (input_section)->sreloc; |
| 3206 | if (sreloc == NULL) |
| 3207 | abort (); |
| 3208 | loc = sreloc->contents; |
| 3209 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3210 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 3211 | } |
| 3212 | else |
| 3213 | { |
| 3214 | BFD_ASSERT (! unresolved_reloc); |
| 3215 | bfd_put_32 (output_bfd, -tpoff (info, relocation), |
| 3216 | contents + rel->r_offset); |
| 3217 | } |
| 3218 | continue; |
| 3219 | |
| 3220 | case R_390_TLS_LDO32: |
| 3221 | if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING)) |
| 3222 | relocation -= dtpoff_base (info); |
| 3223 | else |
| 3224 | /* When converting LDO to LE, we must negate. */ |
| 3225 | relocation = -tpoff (info, relocation); |
| 3226 | break; |
| 3227 | |
| 3228 | /* Relocations for tls instructions. */ |
| 3229 | case R_390_TLS_LOAD: |
| 3230 | case R_390_TLS_GDCALL: |
| 3231 | case R_390_TLS_LDCALL: |
| 3232 | tls_type = GOT_UNKNOWN; |
| 3233 | if (h == NULL && local_got_offsets) |
| 3234 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; |
| 3235 | else if (h != NULL) |
| 3236 | tls_type = elf_s390_hash_entry(h)->tls_type; |
| 3237 | |
| 3238 | if (tls_type == GOT_TLS_GD) |
| 3239 | continue; |
| 3240 | |
| 3241 | if (r_type == R_390_TLS_LOAD) |
| 3242 | { |
| 3243 | if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) |
| 3244 | { |
| 3245 | /* IE->LE transition. Four valid cases: |
| 3246 | l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 |
| 3247 | l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 |
| 3248 | l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 |
| 3249 | l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ |
| 3250 | unsigned int insn, ry; |
| 3251 | |
| 3252 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 3253 | ry = 0; |
| 3254 | if ((insn & 0xff00f000) == 0x58000000) |
| 3255 | /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ |
| 3256 | ry = (insn & 0x000f0000); |
| 3257 | else if ((insn & 0xff0f0000) == 0x58000000) |
| 3258 | /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ |
| 3259 | ry = (insn & 0x0000f000) << 4; |
| 3260 | else if ((insn & 0xff00f000) == 0x5800c000) |
| 3261 | /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ |
| 3262 | ry = (insn & 0x000f0000); |
| 3263 | else if ((insn & 0xff0f0000) == 0x580c0000) |
| 3264 | /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ |
| 3265 | ry = (insn & 0x0000f000) << 4; |
| 3266 | else |
| 3267 | invalid_tls_insn (input_bfd, input_section, rel); |
| 3268 | insn = 0x18000700 | (insn & 0x00f00000) | ry; |
| 3269 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 3270 | } |
| 3271 | } |
| 3272 | else if (r_type == R_390_TLS_GDCALL) |
| 3273 | { |
| 3274 | unsigned int insn; |
| 3275 | |
| 3276 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 3277 | if ((insn & 0xff000fff) != 0x4d000000 && |
| 3278 | (insn & 0xffff0000) != 0xc0e50000 && |
| 3279 | (insn & 0xff000000) != 0x0d000000) |
| 3280 | invalid_tls_insn (input_bfd, input_section, rel); |
| 3281 | if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1)) |
| 3282 | { |
| 3283 | if ((insn & 0xff000000) == 0x0d000000) |
| 3284 | { |
| 3285 | /* GD->LE transition. |
| 3286 | basr rx, ry -> nopr r7 */ |
| 3287 | insn = 0x07070000 | (insn & 0xffff); |
| 3288 | } |
| 3289 | else if ((insn & 0xff000000) == 0x4d000000) |
| 3290 | { |
| 3291 | /* GD->LE transition. |
| 3292 | bas %r14,0(%rx,%r13) -> bc 0,0 */ |
| 3293 | insn = 0x47000000; |
| 3294 | } |
| 3295 | else |
| 3296 | { |
| 3297 | /* GD->LE transition. |
| 3298 | brasl %r14,_tls_get_offset@plt -> brcl 0,. */ |
| 3299 | insn = 0xc0040000; |
| 3300 | bfd_put_16 (output_bfd, 0x0000, |
| 3301 | contents + rel->r_offset + 4); |
| 3302 | } |
| 3303 | } |
| 3304 | else |
| 3305 | { |
| 3306 | /* If basr is used in the pic case to invoke |
| 3307 | _tls_get_offset, something went wrong before. */ |
| 3308 | if ((insn & 0xff000000) == 0x0d000000) |
| 3309 | invalid_tls_insn (input_bfd, input_section, rel); |
| 3310 | |
| 3311 | if ((insn & 0xff000000) == 0x4d000000) |
| 3312 | { |
| 3313 | /* GD->IE transition. |
| 3314 | bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ |
| 3315 | insn = 0x5822c000; |
| 3316 | } |
| 3317 | else |
| 3318 | { |
| 3319 | /* GD->IE transition. |
| 3320 | brasl %r14,__tls_get_addr@plt -> |
| 3321 | l %r2,0(%r2,%r12) ; bcr 0,0 */ |
| 3322 | insn = 0x5822c000; |
| 3323 | bfd_put_16 (output_bfd, 0x0700, |
| 3324 | contents + rel->r_offset + 4); |
| 3325 | } |
| 3326 | } |
| 3327 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 3328 | } |
| 3329 | else if (r_type == R_390_TLS_LDCALL) |
| 3330 | { |
| 3331 | if (!bfd_link_pic (info)) |
| 3332 | { |
| 3333 | unsigned int insn; |
| 3334 | |
| 3335 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 3336 | if ((insn & 0xff000fff) != 0x4d000000 && |
| 3337 | (insn & 0xffff0000) != 0xc0e50000 && |
| 3338 | (insn & 0xff000000) != 0x0d000000) |
| 3339 | invalid_tls_insn (input_bfd, input_section, rel); |
| 3340 | |
| 3341 | if ((insn & 0xff000000) == 0x0d000000) |
| 3342 | { |
| 3343 | /* LD->LE transition. |
| 3344 | basr rx, ry -> nopr r7 */ |
| 3345 | insn = 0x07070000 | (insn & 0xffff); |
| 3346 | } |
| 3347 | else if ((insn & 0xff000000) == 0x4d000000) |
| 3348 | { |
| 3349 | /* LD->LE transition. |
| 3350 | bas %r14,0(%rx,%r13) -> bc 0,0 */ |
| 3351 | insn = 0x47000000; |
| 3352 | } |
| 3353 | else |
| 3354 | { |
| 3355 | /* LD->LE transition. |
| 3356 | brasl %r14,__tls_get_offset@plt -> brcl 0,. */ |
| 3357 | insn = 0xc0040000; |
| 3358 | bfd_put_16 (output_bfd, 0x0000, |
| 3359 | contents + rel->r_offset + 4); |
| 3360 | } |
| 3361 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 3362 | } |
| 3363 | } |
| 3364 | continue; |
| 3365 | |
| 3366 | default: |
| 3367 | break; |
| 3368 | } |
| 3369 | |
| 3370 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 3371 | because such sections are not SEC_ALLOC and thus ld.so will |
| 3372 | not process them. */ |
| 3373 | if (unresolved_reloc |
| 3374 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 3375 | && h->def_dynamic) |
| 3376 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 3377 | rel->r_offset) != (bfd_vma) -1) |
| 3378 | _bfd_error_handler |
| 3379 | /* xgettext:c-format */ |
| 3380 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 3381 | input_bfd, |
| 3382 | input_section, |
| 3383 | (long) rel->r_offset, |
| 3384 | howto->name, |
| 3385 | h->root.root.string); |
| 3386 | |
| 3387 | do_relocation: |
| 3388 | |
| 3389 | /* When applying a 24 bit reloc we need to start one byte |
| 3390 | earlier. Otherwise the 32 bit get/put bfd operations might |
| 3391 | access a byte after the actual section. */ |
| 3392 | if (r_type == R_390_PC24DBL |
| 3393 | || r_type == R_390_PLT24DBL) |
| 3394 | rel->r_offset--; |
| 3395 | |
| 3396 | if (r_type == R_390_20 |
| 3397 | || r_type == R_390_GOT20 |
| 3398 | || r_type == R_390_GOTPLT20 |
| 3399 | || r_type == R_390_TLS_GOTIE20) |
| 3400 | { |
| 3401 | relocation += rel->r_addend; |
| 3402 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; |
| 3403 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3404 | contents, rel->r_offset, |
| 3405 | relocation, 0); |
| 3406 | } |
| 3407 | else |
| 3408 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3409 | contents, rel->r_offset, |
| 3410 | relocation, rel->r_addend); |
| 3411 | |
| 3412 | if (r != bfd_reloc_ok) |
| 3413 | { |
| 3414 | const char *name; |
| 3415 | |
| 3416 | if (h != NULL) |
| 3417 | name = h->root.root.string; |
| 3418 | else |
| 3419 | { |
| 3420 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 3421 | symtab_hdr->sh_link, |
| 3422 | sym->st_name); |
| 3423 | if (name == NULL) |
| 3424 | return FALSE; |
| 3425 | if (*name == '\0') |
| 3426 | name = bfd_section_name (input_bfd, sec); |
| 3427 | } |
| 3428 | |
| 3429 | if (r == bfd_reloc_overflow) |
| 3430 | (*info->callbacks->reloc_overflow) |
| 3431 | (info, (h ? &h->root : NULL), name, howto->name, |
| 3432 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 3433 | else |
| 3434 | { |
| 3435 | _bfd_error_handler |
| 3436 | /* xgettext:c-format */ |
| 3437 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
| 3438 | input_bfd, input_section, |
| 3439 | (long) rel->r_offset, name, (int) r); |
| 3440 | return FALSE; |
| 3441 | } |
| 3442 | } |
| 3443 | } |
| 3444 | |
| 3445 | return TRUE; |
| 3446 | } |
| 3447 | |
| 3448 | /* Generate the PLT slots together with the dynamic relocations needed |
| 3449 | for IFUNC symbols. */ |
| 3450 | |
| 3451 | static void |
| 3452 | elf_s390_finish_ifunc_symbol (bfd *output_bfd, |
| 3453 | struct bfd_link_info *info, |
| 3454 | struct elf_link_hash_entry *h, |
| 3455 | struct elf_s390_link_hash_table *htab, |
| 3456 | bfd_vma iplt_offset, |
| 3457 | bfd_vma resolver_address) |
| 3458 | { |
| 3459 | bfd_vma iplt_index; |
| 3460 | bfd_vma got_offset; |
| 3461 | bfd_vma igotiplt_offset; |
| 3462 | Elf_Internal_Rela rela; |
| 3463 | bfd_byte *loc; |
| 3464 | asection *plt, *gotplt, *relplt; |
| 3465 | bfd_vma relative_offset; |
| 3466 | |
| 3467 | if (htab->elf.iplt == NULL |
| 3468 | || htab->elf.igotplt == NULL |
| 3469 | || htab->elf.irelplt == NULL) |
| 3470 | abort (); |
| 3471 | |
| 3472 | gotplt = htab->elf.igotplt; |
| 3473 | relplt = htab->elf.irelplt; |
| 3474 | |
| 3475 | /* Index of the PLT slot within iplt section. */ |
| 3476 | iplt_index = iplt_offset / PLT_ENTRY_SIZE; |
| 3477 | plt = htab->elf.iplt; |
| 3478 | /* Offset into the igot.plt section. */ |
| 3479 | igotiplt_offset = iplt_index * GOT_ENTRY_SIZE; |
| 3480 | /* Offset into the got section. */ |
| 3481 | got_offset = igotiplt_offset + gotplt->output_offset; |
| 3482 | |
| 3483 | /* S390 uses halfwords for relative branch calc! */ |
| 3484 | relative_offset = - (plt->output_offset + |
| 3485 | (PLT_ENTRY_SIZE * iplt_index) + 18) / 2; |
| 3486 | /* If offset is > 32768, branch to a previous branch |
| 3487 | 390 can only handle +-64 K jumps. */ |
| 3488 | if ( -32768 > (int) relative_offset ) |
| 3489 | relative_offset |
| 3490 | = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); |
| 3491 | |
| 3492 | /* Fill in the entry in the procedure linkage table. */ |
| 3493 | if (!bfd_link_pic (info)) |
| 3494 | { |
| 3495 | memcpy (plt->contents + iplt_offset, elf_s390_plt_entry, |
| 3496 | PLT_ENTRY_SIZE); |
| 3497 | |
| 3498 | /* Adjust jump to the first plt entry. */ |
| 3499 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), |
| 3500 | plt->contents + iplt_offset + 20); |
| 3501 | |
| 3502 | /* Push the GOT offset field. */ |
| 3503 | bfd_put_32 (output_bfd, |
| 3504 | (gotplt->output_section->vma |
| 3505 | + got_offset), |
| 3506 | plt->contents + iplt_offset + 24); |
| 3507 | } |
| 3508 | else if (got_offset < 4096) |
| 3509 | { |
| 3510 | /* The GOT offset is small enough to be used directly as |
| 3511 | displacement. */ |
| 3512 | memcpy (plt->contents + iplt_offset, |
| 3513 | elf_s390_plt_pic12_entry, |
| 3514 | PLT_ENTRY_SIZE); |
| 3515 | |
| 3516 | /* Put in the GOT offset as displacement value. The 0xc000 |
| 3517 | value comes from the first word of the plt entry. Look |
| 3518 | at the elf_s390_plt_pic16_entry content. */ |
| 3519 | bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset, |
| 3520 | plt->contents + iplt_offset + 2); |
| 3521 | |
| 3522 | /* Adjust the jump to the first plt entry. */ |
| 3523 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), |
| 3524 | plt->contents + iplt_offset + 20); |
| 3525 | } |
| 3526 | else if (got_offset < 32768) |
| 3527 | { |
| 3528 | /* The GOT offset is too big for a displacement but small |
| 3529 | enough to be a signed 16 bit immediate value as it can be |
| 3530 | used in an lhi instruction. */ |
| 3531 | memcpy (plt->contents + iplt_offset, |
| 3532 | elf_s390_plt_pic16_entry, |
| 3533 | PLT_ENTRY_SIZE); |
| 3534 | |
| 3535 | /* Put in the GOT offset for the lhi instruction. */ |
| 3536 | bfd_put_16 (output_bfd, (bfd_vma)got_offset, |
| 3537 | plt->contents + iplt_offset + 2); |
| 3538 | |
| 3539 | /* Adjust the jump to the first plt entry. */ |
| 3540 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), |
| 3541 | plt->contents + iplt_offset + 20); |
| 3542 | } |
| 3543 | else |
| 3544 | { |
| 3545 | memcpy (plt->contents + iplt_offset, |
| 3546 | elf_s390_plt_pic_entry, |
| 3547 | PLT_ENTRY_SIZE); |
| 3548 | |
| 3549 | /* Adjust the jump to the first plt entry. */ |
| 3550 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), |
| 3551 | plt->contents + iplt_offset + 20); |
| 3552 | |
| 3553 | /* Push the GOT offset field. */ |
| 3554 | bfd_put_32 (output_bfd, got_offset, |
| 3555 | plt->contents + iplt_offset + 24); |
| 3556 | } |
| 3557 | /* Insert offset into reloc. table here. */ |
| 3558 | bfd_put_32 (output_bfd, relplt->output_offset + |
| 3559 | iplt_index * RELA_ENTRY_SIZE, |
| 3560 | plt->contents + iplt_offset + 28); |
| 3561 | |
| 3562 | /* Fill in the entry in the global offset table. |
| 3563 | Points to instruction after GOT offset. */ |
| 3564 | bfd_put_32 (output_bfd, |
| 3565 | (plt->output_section->vma |
| 3566 | + plt->output_offset |
| 3567 | + iplt_offset |
| 3568 | + 12), |
| 3569 | gotplt->contents + igotiplt_offset); |
| 3570 | |
| 3571 | /* Fill in the entry in the .rela.plt section. */ |
| 3572 | rela.r_offset = gotplt->output_section->vma + got_offset; |
| 3573 | |
| 3574 | if (!h |
| 3575 | || h->dynindx == -1 |
| 3576 | || ((bfd_link_executable (info) |
| 3577 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 3578 | && h->def_regular)) |
| 3579 | { |
| 3580 | /* The symbol can be locally resolved. */ |
| 3581 | rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE); |
| 3582 | rela.r_addend = resolver_address; |
| 3583 | } |
| 3584 | else |
| 3585 | { |
| 3586 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); |
| 3587 | rela.r_addend = 0; |
| 3588 | } |
| 3589 | |
| 3590 | loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE; |
| 3591 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 3592 | } |
| 3593 | |
| 3594 | /* Finish up dynamic symbol handling. We set the contents of various |
| 3595 | dynamic sections here. */ |
| 3596 | |
| 3597 | static bfd_boolean |
| 3598 | elf_s390_finish_dynamic_symbol (bfd *output_bfd, |
| 3599 | struct bfd_link_info *info, |
| 3600 | struct elf_link_hash_entry *h, |
| 3601 | Elf_Internal_Sym *sym) |
| 3602 | { |
| 3603 | struct elf_s390_link_hash_table *htab; |
| 3604 | struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h; |
| 3605 | |
| 3606 | htab = elf_s390_hash_table (info); |
| 3607 | |
| 3608 | if (h->plt.offset != (bfd_vma) -1) |
| 3609 | { |
| 3610 | bfd_vma plt_index; |
| 3611 | bfd_vma got_offset; |
| 3612 | Elf_Internal_Rela rela; |
| 3613 | bfd_byte *loc; |
| 3614 | bfd_vma relative_offset; |
| 3615 | |
| 3616 | /* This symbol has an entry in the procedure linkage table. Set |
| 3617 | it up. */ |
| 3618 | if (s390_is_ifunc_symbol_p (h) && h->def_regular) |
| 3619 | { |
| 3620 | elf_s390_finish_ifunc_symbol (output_bfd, info, h, |
| 3621 | htab, h->plt.offset, |
| 3622 | eh->ifunc_resolver_address + |
| 3623 | eh->ifunc_resolver_section->output_offset + |
| 3624 | eh->ifunc_resolver_section->output_section->vma); |
| 3625 | /* Do not return yet. Handling of explicit GOT slots of |
| 3626 | IFUNC symbols is below. */ |
| 3627 | } |
| 3628 | else |
| 3629 | { |
| 3630 | if (h->dynindx == -1 |
| 3631 | || htab->elf.splt == NULL |
| 3632 | || htab->elf.sgotplt == NULL |
| 3633 | || htab->elf.srelplt == NULL) |
| 3634 | abort (); |
| 3635 | |
| 3636 | /* Calc. index no. |
| 3637 | Current offset - size first entry / entry size. */ |
| 3638 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
| 3639 | |
| 3640 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
| 3641 | addr & GOT addr. */ |
| 3642 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
| 3643 | |
| 3644 | /* S390 uses halfwords for relative branch calc! */ |
| 3645 | relative_offset = - ((PLT_FIRST_ENTRY_SIZE + |
| 3646 | (PLT_ENTRY_SIZE * plt_index) + 18) / 2); |
| 3647 | /* If offset is > 32768, branch to a previous branch |
| 3648 | 390 can only handle +-64 K jumps. */ |
| 3649 | if ( -32768 > (int) relative_offset ) |
| 3650 | relative_offset |
| 3651 | = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); |
| 3652 | |
| 3653 | /* Fill in the entry in the procedure linkage table. */ |
| 3654 | if (!bfd_link_pic (info)) |
| 3655 | { |
| 3656 | memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry, |
| 3657 | PLT_ENTRY_SIZE); |
| 3658 | |
| 3659 | /* Adjust jump to the first plt entry. */ |
| 3660 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), |
| 3661 | htab->elf.splt->contents + h->plt.offset + 20); |
| 3662 | |
| 3663 | /* Push the GOT offset field. */ |
| 3664 | bfd_put_32 (output_bfd, |
| 3665 | (htab->elf.sgotplt->output_section->vma |
| 3666 | + htab->elf.sgotplt->output_offset |
| 3667 | + got_offset), |
| 3668 | htab->elf.splt->contents + h->plt.offset + 24); |
| 3669 | } |
| 3670 | else if (got_offset < 4096) |
| 3671 | { |
| 3672 | /* The GOT offset is small enough to be used directly as |
| 3673 | displacement. */ |
| 3674 | memcpy (htab->elf.splt->contents + h->plt.offset, |
| 3675 | elf_s390_plt_pic12_entry, |
| 3676 | PLT_ENTRY_SIZE); |
| 3677 | |
| 3678 | /* Put in the GOT offset as displacement value. The 0xc000 |
| 3679 | value comes from the first word of the plt entry. Look |
| 3680 | at the elf_s390_plt_pic12_entry content. */ |
| 3681 | bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset, |
| 3682 | htab->elf.splt->contents + h->plt.offset + 2); |
| 3683 | |
| 3684 | /* Adjust the jump to the first plt entry. */ |
| 3685 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), |
| 3686 | htab->elf.splt->contents + h->plt.offset + 20); |
| 3687 | } |
| 3688 | else if (got_offset < 32768) |
| 3689 | { |
| 3690 | /* The GOT offset is too big for a displacement but small |
| 3691 | enough to be a signed 16 bit immediate value as it can be |
| 3692 | used in an lhi instruction. */ |
| 3693 | memcpy (htab->elf.splt->contents + h->plt.offset, |
| 3694 | elf_s390_plt_pic16_entry, |
| 3695 | PLT_ENTRY_SIZE); |
| 3696 | |
| 3697 | /* Put in the GOT offset for the lhi instruction. */ |
| 3698 | bfd_put_16 (output_bfd, (bfd_vma)got_offset, |
| 3699 | htab->elf.splt->contents + h->plt.offset + 2); |
| 3700 | |
| 3701 | /* Adjust the jump to the first plt entry. */ |
| 3702 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), |
| 3703 | htab->elf.splt->contents + h->plt.offset + 20); |
| 3704 | } |
| 3705 | else |
| 3706 | { |
| 3707 | memcpy (htab->elf.splt->contents + h->plt.offset, |
| 3708 | elf_s390_plt_pic_entry, |
| 3709 | PLT_ENTRY_SIZE); |
| 3710 | |
| 3711 | /* Adjust the jump to the first plt entry. */ |
| 3712 | bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), |
| 3713 | htab->elf.splt->contents + h->plt.offset + 20); |
| 3714 | |
| 3715 | /* Push the GOT offset field. */ |
| 3716 | bfd_put_32 (output_bfd, got_offset, |
| 3717 | htab->elf.splt->contents + h->plt.offset + 24); |
| 3718 | } |
| 3719 | /* Insert offset into reloc. table here. */ |
| 3720 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), |
| 3721 | htab->elf.splt->contents + h->plt.offset + 28); |
| 3722 | |
| 3723 | /* Fill in the entry in the global offset table. |
| 3724 | Points to instruction after GOT offset. */ |
| 3725 | bfd_put_32 (output_bfd, |
| 3726 | (htab->elf.splt->output_section->vma |
| 3727 | + htab->elf.splt->output_offset |
| 3728 | + h->plt.offset |
| 3729 | + 12), |
| 3730 | htab->elf.sgotplt->contents + got_offset); |
| 3731 | |
| 3732 | /* Fill in the entry in the .rela.plt section. */ |
| 3733 | rela.r_offset = (htab->elf.sgotplt->output_section->vma |
| 3734 | + htab->elf.sgotplt->output_offset |
| 3735 | + got_offset); |
| 3736 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); |
| 3737 | rela.r_addend = 0; |
| 3738 | loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela); |
| 3739 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 3740 | |
| 3741 | if (!h->def_regular) |
| 3742 | { |
| 3743 | /* Mark the symbol as undefined, rather than as defined in |
| 3744 | the .plt section. Leave the value alone. This is a clue |
| 3745 | for the dynamic linker, to make function pointer |
| 3746 | comparisons work between an application and shared |
| 3747 | library. */ |
| 3748 | sym->st_shndx = SHN_UNDEF; |
| 3749 | } |
| 3750 | } |
| 3751 | } |
| 3752 | |
| 3753 | if (h->got.offset != (bfd_vma) -1 |
| 3754 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD |
| 3755 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE |
| 3756 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) |
| 3757 | { |
| 3758 | Elf_Internal_Rela rela; |
| 3759 | bfd_byte *loc; |
| 3760 | |
| 3761 | /* This symbol has an entry in the global offset table. Set it |
| 3762 | up. */ |
| 3763 | |
| 3764 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
| 3765 | abort (); |
| 3766 | |
| 3767 | rela.r_offset = (htab->elf.sgot->output_section->vma |
| 3768 | + htab->elf.sgot->output_offset |
| 3769 | + (h->got.offset &~ (bfd_vma) 1)); |
| 3770 | |
| 3771 | /* If this is a static link, or it is a -Bsymbolic link and the |
| 3772 | symbol is defined locally or was forced to be local because |
| 3773 | of a version file, we just want to emit a RELATIVE reloc. |
| 3774 | The entry in the global offset table will already have been |
| 3775 | initialized in the relocate_section function. */ |
| 3776 | if (h->def_regular && s390_is_ifunc_symbol_p (h)) |
| 3777 | { |
| 3778 | if (bfd_link_pic (info)) |
| 3779 | { |
| 3780 | /* An explicit GOT slot usage needs GLOB_DAT. If the |
| 3781 | symbol references local the implicit got.iplt slot |
| 3782 | will be used and the IRELATIVE reloc has been created |
| 3783 | above. */ |
| 3784 | goto do_glob_dat; |
| 3785 | } |
| 3786 | else |
| 3787 | { |
| 3788 | /* For non-shared objects explicit GOT slots must be |
| 3789 | filled with the PLT slot address for pointer |
| 3790 | equality reasons. */ |
| 3791 | bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma |
| 3792 | + htab->elf.iplt->output_offset |
| 3793 | + h->plt.offset), |
| 3794 | htab->elf.sgot->contents + h->got.offset); |
| 3795 | return TRUE; |
| 3796 | } |
| 3797 | } |
| 3798 | else if (bfd_link_pic (info) |
| 3799 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 3800 | { |
| 3801 | /* If this is a static link, or it is a -Bsymbolic link and |
| 3802 | the symbol is defined locally or was forced to be local |
| 3803 | because of a version file, we just want to emit a |
| 3804 | RELATIVE reloc. The entry in the global offset table |
| 3805 | will already have been initialized in the |
| 3806 | relocate_section function. */ |
| 3807 | if (!h->def_regular) |
| 3808 | return FALSE; |
| 3809 | BFD_ASSERT((h->got.offset & 1) != 0); |
| 3810 | rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE); |
| 3811 | rela.r_addend = (h->root.u.def.value |
| 3812 | + h->root.u.def.section->output_section->vma |
| 3813 | + h->root.u.def.section->output_offset); |
| 3814 | } |
| 3815 | else |
| 3816 | { |
| 3817 | BFD_ASSERT((h->got.offset & 1) == 0); |
| 3818 | do_glob_dat: |
| 3819 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); |
| 3820 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); |
| 3821 | rela.r_addend = 0; |
| 3822 | } |
| 3823 | |
| 3824 | loc = htab->elf.srelgot->contents; |
| 3825 | loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3826 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 3827 | } |
| 3828 | |
| 3829 | if (h->needs_copy) |
| 3830 | { |
| 3831 | Elf_Internal_Rela rela; |
| 3832 | bfd_byte *loc; |
| 3833 | |
| 3834 | /* This symbols needs a copy reloc. Set it up. */ |
| 3835 | |
| 3836 | if (h->dynindx == -1 |
| 3837 | || (h->root.type != bfd_link_hash_defined |
| 3838 | && h->root.type != bfd_link_hash_defweak) |
| 3839 | || htab->srelbss == NULL) |
| 3840 | abort (); |
| 3841 | |
| 3842 | rela.r_offset = (h->root.u.def.value |
| 3843 | + h->root.u.def.section->output_section->vma |
| 3844 | + h->root.u.def.section->output_offset); |
| 3845 | rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY); |
| 3846 | rela.r_addend = 0; |
| 3847 | loc = htab->srelbss->contents; |
| 3848 | loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3849 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 3850 | } |
| 3851 | |
| 3852 | /* Mark some specially defined symbols as absolute. */ |
| 3853 | if (h == htab->elf.hdynamic |
| 3854 | || h == htab->elf.hgot |
| 3855 | || h == htab->elf.hplt) |
| 3856 | sym->st_shndx = SHN_ABS; |
| 3857 | |
| 3858 | return TRUE; |
| 3859 | } |
| 3860 | |
| 3861 | /* Used to decide how to sort relocs in an optimal manner for the |
| 3862 | dynamic linker, before writing them out. */ |
| 3863 | |
| 3864 | static enum elf_reloc_type_class |
| 3865 | elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 3866 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 3867 | const Elf_Internal_Rela *rela) |
| 3868 | { |
| 3869 | bfd *abfd = info->output_bfd; |
| 3870 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 3871 | struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info); |
| 3872 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); |
| 3873 | Elf_Internal_Sym sym; |
| 3874 | |
| 3875 | if (htab->elf.dynsym == NULL |
| 3876 | || !bed->s->swap_symbol_in (abfd, |
| 3877 | (htab->elf.dynsym->contents |
| 3878 | + r_symndx * bed->s->sizeof_sym), |
| 3879 | 0, &sym)) |
| 3880 | abort (); |
| 3881 | |
| 3882 | /* Check relocation against STT_GNU_IFUNC symbol. */ |
| 3883 | if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
| 3884 | return reloc_class_ifunc; |
| 3885 | |
| 3886 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 3887 | { |
| 3888 | case R_390_RELATIVE: |
| 3889 | return reloc_class_relative; |
| 3890 | case R_390_JMP_SLOT: |
| 3891 | return reloc_class_plt; |
| 3892 | case R_390_COPY: |
| 3893 | return reloc_class_copy; |
| 3894 | default: |
| 3895 | return reloc_class_normal; |
| 3896 | } |
| 3897 | } |
| 3898 | |
| 3899 | /* Finish up the dynamic sections. */ |
| 3900 | |
| 3901 | static bfd_boolean |
| 3902 | elf_s390_finish_dynamic_sections (bfd *output_bfd, |
| 3903 | struct bfd_link_info *info) |
| 3904 | { |
| 3905 | struct elf_s390_link_hash_table *htab; |
| 3906 | bfd *dynobj; |
| 3907 | asection *sdyn; |
| 3908 | bfd *ibfd; |
| 3909 | unsigned int i; |
| 3910 | |
| 3911 | htab = elf_s390_hash_table (info); |
| 3912 | dynobj = htab->elf.dynobj; |
| 3913 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 3914 | |
| 3915 | if (htab->elf.dynamic_sections_created) |
| 3916 | { |
| 3917 | Elf32_External_Dyn *dyncon, *dynconend; |
| 3918 | |
| 3919 | if (sdyn == NULL || htab->elf.sgot == NULL) |
| 3920 | abort (); |
| 3921 | |
| 3922 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 3923 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 3924 | for (; dyncon < dynconend; dyncon++) |
| 3925 | { |
| 3926 | Elf_Internal_Dyn dyn; |
| 3927 | asection *s; |
| 3928 | |
| 3929 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 3930 | |
| 3931 | switch (dyn.d_tag) |
| 3932 | { |
| 3933 | default: |
| 3934 | continue; |
| 3935 | |
| 3936 | case DT_PLTGOT: |
| 3937 | s = htab->elf.sgotplt; |
| 3938 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 3939 | break; |
| 3940 | |
| 3941 | case DT_JMPREL: |
| 3942 | s = htab->elf.srelplt; |
| 3943 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 3944 | break; |
| 3945 | |
| 3946 | case DT_PLTRELSZ: |
| 3947 | dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size; |
| 3948 | break; |
| 3949 | } |
| 3950 | |
| 3951 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3952 | } |
| 3953 | |
| 3954 | /* Fill in the special first entry in the procedure linkage table. */ |
| 3955 | if (htab->elf.splt && htab->elf.splt->size > 0) |
| 3956 | { |
| 3957 | memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE); |
| 3958 | if (bfd_link_pic (info)) |
| 3959 | { |
| 3960 | memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry, |
| 3961 | PLT_FIRST_ENTRY_SIZE); |
| 3962 | } |
| 3963 | else |
| 3964 | { |
| 3965 | memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry, |
| 3966 | PLT_FIRST_ENTRY_SIZE); |
| 3967 | bfd_put_32 (output_bfd, |
| 3968 | htab->elf.sgotplt->output_section->vma |
| 3969 | + htab->elf.sgotplt->output_offset, |
| 3970 | htab->elf.splt->contents + 24); |
| 3971 | } |
| 3972 | elf_section_data (htab->elf.splt->output_section) |
| 3973 | ->this_hdr.sh_entsize = 4; |
| 3974 | } |
| 3975 | |
| 3976 | } |
| 3977 | |
| 3978 | if (htab->elf.sgotplt) |
| 3979 | { |
| 3980 | /* Fill in the first three entries in the global offset table. */ |
| 3981 | if (htab->elf.sgotplt->size > 0) |
| 3982 | { |
| 3983 | bfd_put_32 (output_bfd, |
| 3984 | (sdyn == NULL ? (bfd_vma) 0 |
| 3985 | : sdyn->output_section->vma + sdyn->output_offset), |
| 3986 | htab->elf.sgotplt->contents); |
| 3987 | /* One entry for shared object struct ptr. */ |
| 3988 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4); |
| 3989 | /* One entry for _dl_runtime_resolve. */ |
| 3990 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8); |
| 3991 | } |
| 3992 | |
| 3993 | elf_section_data (htab->elf.sgotplt->output_section) |
| 3994 | ->this_hdr.sh_entsize = 4; |
| 3995 | } |
| 3996 | /* Finish dynamic symbol for local IFUNC symbols. */ |
| 3997 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 3998 | { |
| 3999 | struct plt_entry *local_plt; |
| 4000 | Elf_Internal_Sym *isym; |
| 4001 | Elf_Internal_Shdr *symtab_hdr; |
| 4002 | |
| 4003 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 4004 | |
| 4005 | local_plt = elf_s390_local_plt (ibfd); |
| 4006 | if (local_plt != NULL) |
| 4007 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 4008 | { |
| 4009 | if (local_plt[i].plt.offset != (bfd_vma) -1) |
| 4010 | { |
| 4011 | asection *sec = local_plt[i].sec; |
| 4012 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i); |
| 4013 | if (isym == NULL) |
| 4014 | return FALSE; |
| 4015 | |
| 4016 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 4017 | elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab, |
| 4018 | local_plt[i].plt.offset, |
| 4019 | isym->st_value |
| 4020 | + sec->output_section->vma |
| 4021 | + sec->output_offset); |
| 4022 | |
| 4023 | } |
| 4024 | } |
| 4025 | } |
| 4026 | return TRUE; |
| 4027 | } |
| 4028 | \f |
| 4029 | /* Support for core dump NOTE sections. */ |
| 4030 | |
| 4031 | static bfd_boolean |
| 4032 | elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note) |
| 4033 | { |
| 4034 | int offset; |
| 4035 | unsigned int size; |
| 4036 | |
| 4037 | switch (note->descsz) |
| 4038 | { |
| 4039 | default: |
| 4040 | return FALSE; |
| 4041 | |
| 4042 | case 224: /* S/390 Linux. */ |
| 4043 | /* pr_cursig */ |
| 4044 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 4045 | |
| 4046 | /* pr_pid */ |
| 4047 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 4048 | |
| 4049 | /* pr_reg */ |
| 4050 | offset = 72; |
| 4051 | size = 144; |
| 4052 | break; |
| 4053 | } |
| 4054 | |
| 4055 | /* Make a ".reg/999" section. */ |
| 4056 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 4057 | size, note->descpos + offset); |
| 4058 | } |
| 4059 | |
| 4060 | static bfd_boolean |
| 4061 | elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 4062 | { |
| 4063 | switch (note->descsz) |
| 4064 | { |
| 4065 | default: |
| 4066 | return FALSE; |
| 4067 | |
| 4068 | case 124: /* sizeof(struct elf_prpsinfo) on s390 */ |
| 4069 | elf_tdata (abfd)->core->pid |
| 4070 | = bfd_get_32 (abfd, note->descdata + 12); |
| 4071 | elf_tdata (abfd)->core->program |
| 4072 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 4073 | elf_tdata (abfd)->core->command |
| 4074 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 4075 | break; |
| 4076 | } |
| 4077 | |
| 4078 | /* Note that for some reason, a spurious space is tacked |
| 4079 | onto the end of the args in some (at least one anyway) |
| 4080 | implementations, so strip it off if it exists. */ |
| 4081 | |
| 4082 | { |
| 4083 | char *command = elf_tdata (abfd)->core->command; |
| 4084 | int n = strlen (command); |
| 4085 | |
| 4086 | if (0 < n && command[n - 1] == ' ') |
| 4087 | command[n - 1] = '\0'; |
| 4088 | } |
| 4089 | |
| 4090 | return TRUE; |
| 4091 | } |
| 4092 | |
| 4093 | static char * |
| 4094 | elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz, |
| 4095 | int note_type, ...) |
| 4096 | { |
| 4097 | va_list ap; |
| 4098 | |
| 4099 | switch (note_type) |
| 4100 | { |
| 4101 | default: |
| 4102 | return NULL; |
| 4103 | |
| 4104 | case NT_PRPSINFO: |
| 4105 | { |
| 4106 | char data[124] = { 0 }; |
| 4107 | const char *fname, *psargs; |
| 4108 | |
| 4109 | va_start (ap, note_type); |
| 4110 | fname = va_arg (ap, const char *); |
| 4111 | psargs = va_arg (ap, const char *); |
| 4112 | va_end (ap); |
| 4113 | |
| 4114 | strncpy (data + 28, fname, 16); |
| 4115 | strncpy (data + 44, psargs, 80); |
| 4116 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
| 4117 | &data, sizeof (data)); |
| 4118 | } |
| 4119 | |
| 4120 | case NT_PRSTATUS: |
| 4121 | { |
| 4122 | char data[224] = { 0 }; |
| 4123 | long pid; |
| 4124 | int cursig; |
| 4125 | const void *gregs; |
| 4126 | |
| 4127 | va_start (ap, note_type); |
| 4128 | pid = va_arg (ap, long); |
| 4129 | cursig = va_arg (ap, int); |
| 4130 | gregs = va_arg (ap, const void *); |
| 4131 | va_end (ap); |
| 4132 | |
| 4133 | bfd_put_16 (abfd, cursig, data + 12); |
| 4134 | bfd_put_32 (abfd, pid, data + 24); |
| 4135 | memcpy (data + 72, gregs, 144); |
| 4136 | return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, |
| 4137 | &data, sizeof (data)); |
| 4138 | } |
| 4139 | } |
| 4140 | /* NOTREACHED */ |
| 4141 | } |
| 4142 | \f |
| 4143 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 4144 | or (bfd_vma) -1 if it should not be included. */ |
| 4145 | |
| 4146 | static bfd_vma |
| 4147 | elf_s390_plt_sym_val (bfd_vma i, const asection *plt, |
| 4148 | const arelent *rel ATTRIBUTE_UNUSED) |
| 4149 | { |
| 4150 | return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; |
| 4151 | } |
| 4152 | |
| 4153 | /* Merge backend specific data from an object file to the output |
| 4154 | object file when linking. */ |
| 4155 | |
| 4156 | static bfd_boolean |
| 4157 | elf32_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 4158 | { |
| 4159 | bfd *obfd = info->output_bfd; |
| 4160 | |
| 4161 | if (!is_s390_elf (ibfd) || !is_s390_elf (obfd)) |
| 4162 | return TRUE; |
| 4163 | |
| 4164 | if (!elf_s390_merge_obj_attributes (ibfd, info)) |
| 4165 | return FALSE; |
| 4166 | |
| 4167 | elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags; |
| 4168 | return TRUE; |
| 4169 | } |
| 4170 | |
| 4171 | |
| 4172 | #define TARGET_BIG_SYM s390_elf32_vec |
| 4173 | #define TARGET_BIG_NAME "elf32-s390" |
| 4174 | #define ELF_ARCH bfd_arch_s390 |
| 4175 | #define ELF_TARGET_ID S390_ELF_DATA |
| 4176 | #define ELF_MACHINE_CODE EM_S390 |
| 4177 | #define ELF_MACHINE_ALT1 EM_S390_OLD |
| 4178 | #define ELF_MAXPAGESIZE 0x1000 |
| 4179 | |
| 4180 | #define elf_backend_can_gc_sections 1 |
| 4181 | #define elf_backend_can_refcount 1 |
| 4182 | #define elf_backend_want_got_plt 1 |
| 4183 | #define elf_backend_plt_readonly 1 |
| 4184 | #define elf_backend_want_plt_sym 0 |
| 4185 | #define elf_backend_got_header_size 12 |
| 4186 | #define elf_backend_rela_normal 1 |
| 4187 | |
| 4188 | #define elf_info_to_howto elf_s390_info_to_howto |
| 4189 | |
| 4190 | #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name |
| 4191 | #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create |
| 4192 | #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup |
| 4193 | #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup |
| 4194 | |
| 4195 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data |
| 4196 | |
| 4197 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol |
| 4198 | #define elf_backend_check_relocs elf_s390_check_relocs |
| 4199 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
| 4200 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections |
| 4201 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
| 4202 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol |
| 4203 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook |
| 4204 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook |
| 4205 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
| 4206 | #define elf_backend_relocate_section elf_s390_relocate_section |
| 4207 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections |
| 4208 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
| 4209 | #define elf_backend_grok_prstatus elf_s390_grok_prstatus |
| 4210 | #define elf_backend_grok_psinfo elf_s390_grok_psinfo |
| 4211 | #define elf_backend_write_core_note elf_s390_write_core_note |
| 4212 | #define elf_backend_plt_sym_val elf_s390_plt_sym_val |
| 4213 | #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook |
| 4214 | #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p |
| 4215 | |
| 4216 | #define bfd_elf32_mkobject elf_s390_mkobject |
| 4217 | #define elf_backend_object_p elf_s390_object_p |
| 4218 | |
| 4219 | #include "elf32-target.h" |