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cbf097d7b0
bfd/ PR ld/26918 * elf64-s390.c (elf_s390_finish_dynamic_sections): Set .got sh_entsize only if .got size > 0. ld: PR ld/26918 * testsuite/ld-s390/pr26918-1.d: New file. * testsuite/ld-s390/pr26918-1.s: Likewise. * testsuite/ld-s390/s390.exp: Run all *.d tests.
3898 lines
118 KiB
C
3898 lines
118 KiB
C
/* IBM S/390-specific support for 64-bit ELF
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Copyright (C) 2000-2020 Free Software Foundation, Inc.
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Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/s390.h"
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#include "elf-s390.h"
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#include <stdarg.h>
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/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
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from smaller values. Start with zero, widen, *then* decrement. */
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#define MINUS_ONE (((bfd_vma)0) - 1)
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static bfd_reloc_status_type
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s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
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asection *, bfd *, char **);
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static bfd_reloc_status_type
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s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
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asection *, bfd *, char **);
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/* The relocation "howto" table. */
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static reloc_howto_type elf_howto_table[] =
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{
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HOWTO (R_390_NONE, /* type */
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0, /* rightshift */
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3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_390_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
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HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
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HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
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HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
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HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
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HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
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HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
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HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
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HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
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HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
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HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
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HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
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HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
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HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
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HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
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HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
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HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
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HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
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HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
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HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
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s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
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EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
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HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
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HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
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bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
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EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
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HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
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EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
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HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
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EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
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HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
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HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
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EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
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HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
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EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
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HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
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HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
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HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
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HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
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HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
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HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
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HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
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HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
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s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
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HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
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HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
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HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
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HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
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HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
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bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
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};
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/* GNU extension to record C++ vtable hierarchy. */
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static reloc_howto_type elf64_s390_vtinherit_howto =
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HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
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static reloc_howto_type elf64_s390_vtentry_howto =
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HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
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static reloc_howto_type *
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elf_s390_reloc_type_lookup (bfd *abfd,
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bfd_reloc_code_real_type code)
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{
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switch (code)
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{
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case BFD_RELOC_NONE:
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return &elf_howto_table[(int) R_390_NONE];
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case BFD_RELOC_8:
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return &elf_howto_table[(int) R_390_8];
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case BFD_RELOC_390_12:
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return &elf_howto_table[(int) R_390_12];
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case BFD_RELOC_16:
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return &elf_howto_table[(int) R_390_16];
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case BFD_RELOC_32:
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return &elf_howto_table[(int) R_390_32];
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case BFD_RELOC_CTOR:
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return &elf_howto_table[(int) R_390_32];
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case BFD_RELOC_32_PCREL:
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return &elf_howto_table[(int) R_390_PC32];
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case BFD_RELOC_390_GOT12:
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return &elf_howto_table[(int) R_390_GOT12];
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case BFD_RELOC_32_GOT_PCREL:
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return &elf_howto_table[(int) R_390_GOT32];
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case BFD_RELOC_390_PLT32:
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return &elf_howto_table[(int) R_390_PLT32];
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case BFD_RELOC_390_COPY:
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return &elf_howto_table[(int) R_390_COPY];
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case BFD_RELOC_390_GLOB_DAT:
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return &elf_howto_table[(int) R_390_GLOB_DAT];
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case BFD_RELOC_390_JMP_SLOT:
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return &elf_howto_table[(int) R_390_JMP_SLOT];
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case BFD_RELOC_390_RELATIVE:
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return &elf_howto_table[(int) R_390_RELATIVE];
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case BFD_RELOC_32_GOTOFF:
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return &elf_howto_table[(int) R_390_GOTOFF32];
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case BFD_RELOC_390_GOTPC:
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return &elf_howto_table[(int) R_390_GOTPC];
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case BFD_RELOC_390_GOT16:
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return &elf_howto_table[(int) R_390_GOT16];
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case BFD_RELOC_16_PCREL:
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return &elf_howto_table[(int) R_390_PC16];
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case BFD_RELOC_390_PC12DBL:
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return &elf_howto_table[(int) R_390_PC12DBL];
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case BFD_RELOC_390_PLT12DBL:
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return &elf_howto_table[(int) R_390_PLT12DBL];
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case BFD_RELOC_390_PC16DBL:
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return &elf_howto_table[(int) R_390_PC16DBL];
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case BFD_RELOC_390_PLT16DBL:
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return &elf_howto_table[(int) R_390_PLT16DBL];
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case BFD_RELOC_390_PC24DBL:
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return &elf_howto_table[(int) R_390_PC24DBL];
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case BFD_RELOC_390_PLT24DBL:
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return &elf_howto_table[(int) R_390_PLT24DBL];
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case BFD_RELOC_390_PC32DBL:
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return &elf_howto_table[(int) R_390_PC32DBL];
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case BFD_RELOC_390_PLT32DBL:
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return &elf_howto_table[(int) R_390_PLT32DBL];
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case BFD_RELOC_390_GOTPCDBL:
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return &elf_howto_table[(int) R_390_GOTPCDBL];
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case BFD_RELOC_64:
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return &elf_howto_table[(int) R_390_64];
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case BFD_RELOC_64_PCREL:
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return &elf_howto_table[(int) R_390_PC64];
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case BFD_RELOC_390_GOT64:
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return &elf_howto_table[(int) R_390_GOT64];
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case BFD_RELOC_390_PLT64:
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return &elf_howto_table[(int) R_390_PLT64];
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case BFD_RELOC_390_GOTENT:
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return &elf_howto_table[(int) R_390_GOTENT];
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case BFD_RELOC_16_GOTOFF:
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return &elf_howto_table[(int) R_390_GOTOFF16];
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case BFD_RELOC_390_GOTOFF64:
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return &elf_howto_table[(int) R_390_GOTOFF64];
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case BFD_RELOC_390_GOTPLT12:
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return &elf_howto_table[(int) R_390_GOTPLT12];
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case BFD_RELOC_390_GOTPLT16:
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return &elf_howto_table[(int) R_390_GOTPLT16];
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case BFD_RELOC_390_GOTPLT32:
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return &elf_howto_table[(int) R_390_GOTPLT32];
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case BFD_RELOC_390_GOTPLT64:
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return &elf_howto_table[(int) R_390_GOTPLT64];
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case BFD_RELOC_390_GOTPLTENT:
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return &elf_howto_table[(int) R_390_GOTPLTENT];
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case BFD_RELOC_390_PLTOFF16:
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return &elf_howto_table[(int) R_390_PLTOFF16];
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case BFD_RELOC_390_PLTOFF32:
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return &elf_howto_table[(int) R_390_PLTOFF32];
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case BFD_RELOC_390_PLTOFF64:
|
||
return &elf_howto_table[(int) R_390_PLTOFF64];
|
||
case BFD_RELOC_390_TLS_LOAD:
|
||
return &elf_howto_table[(int) R_390_TLS_LOAD];
|
||
case BFD_RELOC_390_TLS_GDCALL:
|
||
return &elf_howto_table[(int) R_390_TLS_GDCALL];
|
||
case BFD_RELOC_390_TLS_LDCALL:
|
||
return &elf_howto_table[(int) R_390_TLS_LDCALL];
|
||
case BFD_RELOC_390_TLS_GD64:
|
||
return &elf_howto_table[(int) R_390_TLS_GD64];
|
||
case BFD_RELOC_390_TLS_GOTIE12:
|
||
return &elf_howto_table[(int) R_390_TLS_GOTIE12];
|
||
case BFD_RELOC_390_TLS_GOTIE64:
|
||
return &elf_howto_table[(int) R_390_TLS_GOTIE64];
|
||
case BFD_RELOC_390_TLS_LDM64:
|
||
return &elf_howto_table[(int) R_390_TLS_LDM64];
|
||
case BFD_RELOC_390_TLS_IE64:
|
||
return &elf_howto_table[(int) R_390_TLS_IE64];
|
||
case BFD_RELOC_390_TLS_IEENT:
|
||
return &elf_howto_table[(int) R_390_TLS_IEENT];
|
||
case BFD_RELOC_390_TLS_LE64:
|
||
return &elf_howto_table[(int) R_390_TLS_LE64];
|
||
case BFD_RELOC_390_TLS_LDO64:
|
||
return &elf_howto_table[(int) R_390_TLS_LDO64];
|
||
case BFD_RELOC_390_TLS_DTPMOD:
|
||
return &elf_howto_table[(int) R_390_TLS_DTPMOD];
|
||
case BFD_RELOC_390_TLS_DTPOFF:
|
||
return &elf_howto_table[(int) R_390_TLS_DTPOFF];
|
||
case BFD_RELOC_390_TLS_TPOFF:
|
||
return &elf_howto_table[(int) R_390_TLS_TPOFF];
|
||
case BFD_RELOC_390_20:
|
||
return &elf_howto_table[(int) R_390_20];
|
||
case BFD_RELOC_390_GOT20:
|
||
return &elf_howto_table[(int) R_390_GOT20];
|
||
case BFD_RELOC_390_GOTPLT20:
|
||
return &elf_howto_table[(int) R_390_GOTPLT20];
|
||
case BFD_RELOC_390_TLS_GOTIE20:
|
||
return &elf_howto_table[(int) R_390_TLS_GOTIE20];
|
||
case BFD_RELOC_390_IRELATIVE:
|
||
return &elf_howto_table[(int) R_390_IRELATIVE];
|
||
case BFD_RELOC_VTABLE_INHERIT:
|
||
return &elf64_s390_vtinherit_howto;
|
||
case BFD_RELOC_VTABLE_ENTRY:
|
||
return &elf64_s390_vtentry_howto;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return NULL;
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
const char *r_name)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0;
|
||
i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
|
||
i++)
|
||
if (elf_howto_table[i].name != NULL
|
||
&& strcasecmp (elf_howto_table[i].name, r_name) == 0)
|
||
return &elf_howto_table[i];
|
||
|
||
if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
|
||
return &elf64_s390_vtinherit_howto;
|
||
if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
|
||
return &elf64_s390_vtentry_howto;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* We need to use ELF64_R_TYPE so we have our own copy of this function,
|
||
and elf64-s390.c has its own copy. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
|
||
arelent *cache_ptr,
|
||
Elf_Internal_Rela *dst)
|
||
{
|
||
unsigned int r_type = ELF64_R_TYPE(dst->r_info);
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_390_GNU_VTINHERIT:
|
||
cache_ptr->howto = &elf64_s390_vtinherit_howto;
|
||
break;
|
||
|
||
case R_390_GNU_VTENTRY:
|
||
cache_ptr->howto = &elf64_s390_vtentry_howto;
|
||
break;
|
||
|
||
default:
|
||
if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
|
||
{
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
|
||
abfd, r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
cache_ptr->howto = &elf_howto_table[r_type];
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/* A relocation function which doesn't do anything. */
|
||
static bfd_reloc_status_type
|
||
s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
||
arelent *reloc_entry,
|
||
asymbol *symbol ATTRIBUTE_UNUSED,
|
||
void * data ATTRIBUTE_UNUSED,
|
||
asection *input_section,
|
||
bfd *output_bfd,
|
||
char **error_message ATTRIBUTE_UNUSED)
|
||
{
|
||
if (output_bfd)
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Handle the large displacement relocs. */
|
||
static bfd_reloc_status_type
|
||
s390_elf_ldisp_reloc (bfd *abfd,
|
||
arelent *reloc_entry,
|
||
asymbol *symbol,
|
||
void * data,
|
||
asection *input_section,
|
||
bfd *output_bfd,
|
||
char **error_message ATTRIBUTE_UNUSED)
|
||
{
|
||
reloc_howto_type *howto = reloc_entry->howto;
|
||
bfd_vma relocation;
|
||
bfd_vma insn;
|
||
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& (! howto->partial_inplace
|
||
|| reloc_entry->addend == 0))
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
if (output_bfd != NULL)
|
||
return bfd_reloc_continue;
|
||
|
||
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
|
||
return bfd_reloc_outofrange;
|
||
|
||
relocation = (symbol->value
|
||
+ symbol->section->output_section->vma
|
||
+ symbol->section->output_offset);
|
||
relocation += reloc_entry->addend;
|
||
if (howto->pc_relative)
|
||
{
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
relocation -= reloc_entry->address;
|
||
}
|
||
|
||
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
||
insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
|
||
bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
if ((bfd_signed_vma) relocation < - 0x80000
|
||
|| (bfd_signed_vma) relocation > 0x7ffff)
|
||
return bfd_reloc_overflow;
|
||
else
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf_s390_is_local_label_name (bfd *abfd, const char *name)
|
||
{
|
||
if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
|
||
return TRUE;
|
||
|
||
return _bfd_elf_is_local_label_name (abfd, name);
|
||
}
|
||
|
||
/* Functions for the 390 ELF linker. */
|
||
|
||
/* The name of the dynamic interpreter. This is put in the .interp
|
||
section. */
|
||
|
||
#define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
|
||
|
||
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
|
||
copying dynamic variables from a shared lib into an app's dynbss
|
||
section, and instead use a dynamic relocation to point into the
|
||
shared lib. */
|
||
#define ELIMINATE_COPY_RELOCS 1
|
||
|
||
/* The size in bytes of the first entry in the procedure linkage table. */
|
||
#define PLT_FIRST_ENTRY_SIZE 32
|
||
/* The size in bytes of an entry in the procedure linkage table. */
|
||
#define PLT_ENTRY_SIZE 32
|
||
|
||
#define GOT_ENTRY_SIZE 8
|
||
|
||
#define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
|
||
|
||
/* The first three entries in a global offset table are reserved,
|
||
and the initial contents are unimportant (we zero them out).
|
||
Subsequent entries look like this. See the SVR4 ABI 386
|
||
supplement to see how this works. */
|
||
|
||
/* For the s390, simple addr offset can only be 0 - 4096.
|
||
To use the full 16777216 TB address space, several instructions
|
||
are needed to load an address in a register and execute
|
||
a branch( or just saving the address)
|
||
|
||
Furthermore, only r 0 and 1 are free to use!!! */
|
||
|
||
/* The first 3 words in the GOT are then reserved.
|
||
Word 0 is the address of the dynamic table.
|
||
Word 1 is a pointer to a structure describing the object
|
||
Word 2 is used to point to the loader entry address.
|
||
|
||
The code for PLT entries looks like this:
|
||
|
||
The GOT holds the address in the PLT to be executed.
|
||
The loader then gets:
|
||
48(15) = Pointer to the structure describing the object.
|
||
56(15) = Offset in symbol table
|
||
The loader must then find the module where the function is
|
||
and insert the address in the GOT.
|
||
|
||
PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
|
||
LG 1,0(1) # 6 bytes Load address from GOT in r1
|
||
BCR 15,1 # 2 bytes Jump to address
|
||
RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
|
||
LGF 1,12(1) # 6 bytes Load rela.plt offset into r1
|
||
BRCL 15,-x # 6 bytes Jump to first PLT entry
|
||
.long ? # 4 bytes offset into .rela.plt
|
||
|
||
Total = 32 bytes per PLT entry
|
||
Fixup at offset 2: relative address to GOT entry
|
||
Fixup at offset 22: relative branch to PLT0
|
||
Fixup at offset 28: 32 bit offset into .rela.plt
|
||
|
||
A 32 bit offset into the symbol table is enough. It allows for
|
||
.rela.plt sections up to a size of 2 gigabyte. A single dynamic
|
||
object (the main program, any shared library) is limited to 4GB in
|
||
size. Having a .rela.plt of 2GB would already make the .plt
|
||
section bigger than 8GB. */
|
||
|
||
static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
|
||
0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
|
||
0x07, 0xf1, /* br %r1 */
|
||
0x0d, 0x10, /* basr %r1,%r0 */
|
||
0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
|
||
0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
|
||
0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
|
||
};
|
||
|
||
/* The first PLT entry pushes the offset into the symbol table
|
||
from R1 onto the stack at 56(15) and the loader object info
|
||
at 48(15), loads the loader address in R1 and jumps to it. */
|
||
|
||
/* The first entry in the PLT:
|
||
|
||
PLT0:
|
||
STG 1,56(15) # r1 contains the offset into the symbol table
|
||
LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
|
||
MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
|
||
LG 1,16(1) # get entry address of loader
|
||
BCR 15,1 # jump to loader
|
||
|
||
Fixup at offset 8: relative address to start of GOT. */
|
||
|
||
static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
|
||
{
|
||
0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
|
||
0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
|
||
0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
|
||
0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
|
||
0x07, 0xf1, /* br %r1 */
|
||
0x07, 0x00, /* nopr %r0 */
|
||
0x07, 0x00, /* nopr %r0 */
|
||
0x07, 0x00 /* nopr %r0 */
|
||
};
|
||
|
||
|
||
/* s390 ELF linker hash entry. */
|
||
|
||
struct elf_s390_link_hash_entry
|
||
{
|
||
struct elf_link_hash_entry elf;
|
||
|
||
/* Number of GOTPLT references for a function. */
|
||
bfd_signed_vma gotplt_refcount;
|
||
|
||
#define GOT_UNKNOWN 0
|
||
#define GOT_NORMAL 1
|
||
#define GOT_TLS_GD 2
|
||
#define GOT_TLS_IE 3
|
||
#define GOT_TLS_IE_NLT 3
|
||
unsigned char tls_type;
|
||
|
||
/* For pointer equality reasons we might need to change the symbol
|
||
type from STT_GNU_IFUNC to STT_FUNC together with its value and
|
||
section entry. So after alloc_dynrelocs only these values should
|
||
be used. In order to check whether a symbol is IFUNC use
|
||
s390_is_ifunc_symbol_p. */
|
||
bfd_vma ifunc_resolver_address;
|
||
asection *ifunc_resolver_section;
|
||
};
|
||
|
||
#define elf_s390_hash_entry(ent) \
|
||
((struct elf_s390_link_hash_entry *)(ent))
|
||
|
||
/* This structure represents an entry in the local PLT list needed for
|
||
local IFUNC symbols. */
|
||
struct plt_entry
|
||
{
|
||
/* The section of the local symbol.
|
||
Set in relocate_section and used in finish_dynamic_sections. */
|
||
asection *sec;
|
||
|
||
union
|
||
{
|
||
bfd_signed_vma refcount;
|
||
bfd_vma offset;
|
||
} plt;
|
||
};
|
||
|
||
/* NOTE: Keep this structure in sync with
|
||
the one declared in elf32-s390.c. */
|
||
struct elf_s390_obj_tdata
|
||
{
|
||
struct elf_obj_tdata root;
|
||
|
||
/* A local PLT is needed for ifunc symbols. */
|
||
struct plt_entry *local_plt;
|
||
|
||
/* TLS type for each local got entry. */
|
||
char *local_got_tls_type;
|
||
};
|
||
|
||
#define elf_s390_tdata(abfd) \
|
||
((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
|
||
|
||
#define elf_s390_local_plt(abfd) \
|
||
(elf_s390_tdata (abfd)->local_plt)
|
||
|
||
#define elf_s390_local_got_tls_type(abfd) \
|
||
(elf_s390_tdata (abfd)->local_got_tls_type)
|
||
|
||
#define is_s390_elf(bfd) \
|
||
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
|
||
&& elf_tdata (bfd) != NULL \
|
||
&& elf_object_id (bfd) == S390_ELF_DATA)
|
||
|
||
static bfd_boolean
|
||
elf_s390_mkobject (bfd *abfd)
|
||
{
|
||
return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
|
||
S390_ELF_DATA);
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf_s390_object_p (bfd *abfd)
|
||
{
|
||
/* Set the right machine number for an s390 elf32 file. */
|
||
return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
|
||
}
|
||
|
||
/* s390 ELF linker hash table. */
|
||
|
||
struct elf_s390_link_hash_table
|
||
{
|
||
struct elf_link_hash_table elf;
|
||
|
||
/* Short-cuts to get to dynamic linker sections. */
|
||
asection *irelifunc;
|
||
|
||
union {
|
||
bfd_signed_vma refcount;
|
||
bfd_vma offset;
|
||
} tls_ldm_got;
|
||
|
||
/* Options passed from the linker. */
|
||
struct s390_elf_params *params;
|
||
};
|
||
|
||
/* Get the s390 ELF linker hash table from a link_info structure. */
|
||
|
||
#define elf_s390_hash_table(p) \
|
||
((is_elf_hash_table ((p)->hash) \
|
||
&& elf_hash_table_id (elf_hash_table (p)) == S390_ELF_DATA) \
|
||
? (struct elf_s390_link_hash_table *) (p)->hash : NULL)
|
||
|
||
#define ELF64 1
|
||
#include "elf-s390-common.c"
|
||
|
||
/* Create an entry in an s390 ELF linker hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
link_hash_newfunc (struct bfd_hash_entry *entry,
|
||
struct bfd_hash_table *table,
|
||
const char *string)
|
||
{
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (entry == NULL)
|
||
{
|
||
entry = bfd_hash_allocate (table,
|
||
sizeof (struct elf_s390_link_hash_entry));
|
||
if (entry == NULL)
|
||
return entry;
|
||
}
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
|
||
if (entry != NULL)
|
||
{
|
||
struct elf_s390_link_hash_entry *eh;
|
||
|
||
eh = (struct elf_s390_link_hash_entry *) entry;
|
||
eh->gotplt_refcount = 0;
|
||
eh->tls_type = GOT_UNKNOWN;
|
||
eh->ifunc_resolver_address = 0;
|
||
eh->ifunc_resolver_section = NULL;
|
||
}
|
||
|
||
return entry;
|
||
}
|
||
|
||
/* Create an s390 ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
elf_s390_link_hash_table_create (bfd *abfd)
|
||
{
|
||
struct elf_s390_link_hash_table *ret;
|
||
size_t amt = sizeof (struct elf_s390_link_hash_table);
|
||
|
||
ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
|
||
if (ret == NULL)
|
||
return NULL;
|
||
|
||
if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
|
||
sizeof (struct elf_s390_link_hash_entry),
|
||
S390_ELF_DATA))
|
||
{
|
||
free (ret);
|
||
return NULL;
|
||
}
|
||
|
||
return &ret->elf.root;
|
||
}
|
||
|
||
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
||
|
||
static void
|
||
elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *dir,
|
||
struct elf_link_hash_entry *ind)
|
||
{
|
||
struct elf_s390_link_hash_entry *edir, *eind;
|
||
|
||
edir = (struct elf_s390_link_hash_entry *) dir;
|
||
eind = (struct elf_s390_link_hash_entry *) ind;
|
||
|
||
if (ind->root.type == bfd_link_hash_indirect
|
||
&& dir->got.refcount <= 0)
|
||
{
|
||
edir->tls_type = eind->tls_type;
|
||
eind->tls_type = GOT_UNKNOWN;
|
||
}
|
||
|
||
if (ELIMINATE_COPY_RELOCS
|
||
&& ind->root.type != bfd_link_hash_indirect
|
||
&& dir->dynamic_adjusted)
|
||
{
|
||
/* If called to transfer flags for a weakdef during processing
|
||
of elf_adjust_dynamic_symbol, don't copy non_got_ref.
|
||
We clear it ourselves for ELIMINATE_COPY_RELOCS. */
|
||
if (dir->versioned != versioned_hidden)
|
||
dir->ref_dynamic |= ind->ref_dynamic;
|
||
dir->ref_regular |= ind->ref_regular;
|
||
dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
|
||
dir->needs_plt |= ind->needs_plt;
|
||
}
|
||
else
|
||
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
||
}
|
||
|
||
static int
|
||
elf_s390_tls_transition (struct bfd_link_info *info,
|
||
int r_type,
|
||
int is_local)
|
||
{
|
||
if (bfd_link_pic (info))
|
||
return r_type;
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_390_TLS_GD64:
|
||
case R_390_TLS_IE64:
|
||
if (is_local)
|
||
return R_390_TLS_LE64;
|
||
return R_390_TLS_IE64;
|
||
case R_390_TLS_GOTIE64:
|
||
if (is_local)
|
||
return R_390_TLS_LE64;
|
||
return R_390_TLS_GOTIE64;
|
||
case R_390_TLS_LDM64:
|
||
return R_390_TLS_LE64;
|
||
}
|
||
|
||
return r_type;
|
||
}
|
||
|
||
/* Look through the relocs for a section during the first phase, and
|
||
allocate space in the global offset table or procedure linkage
|
||
table. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_check_relocs (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
asection *sec,
|
||
const Elf_Internal_Rela *relocs)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
asection *sreloc;
|
||
bfd_signed_vma *local_got_refcounts;
|
||
int tls_type, old_tls_type;
|
||
|
||
if (bfd_link_relocatable (info))
|
||
return TRUE;
|
||
|
||
BFD_ASSERT (is_s390_elf (abfd));
|
||
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
symtab_hdr = &elf_symtab_hdr (abfd);
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
|
||
sreloc = NULL;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
unsigned int r_type;
|
||
unsigned int r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *isym;
|
||
|
||
r_symndx = ELF64_R_SYM (rel->r_info);
|
||
|
||
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
|
||
{
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: bad symbol index: %d"),
|
||
abfd, r_symndx);
|
||
return FALSE;
|
||
}
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
/* A local symbol. */
|
||
isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
|
||
abfd, r_symndx);
|
||
if (isym == NULL)
|
||
return FALSE;
|
||
|
||
if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
|
||
{
|
||
struct plt_entry *plt;
|
||
|
||
if (htab->elf.dynobj == NULL)
|
||
htab->elf.dynobj = abfd;
|
||
|
||
if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
|
||
return FALSE;
|
||
|
||
if (local_got_refcounts == NULL)
|
||
{
|
||
if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
|
||
return FALSE;
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
}
|
||
plt = elf_s390_local_plt (abfd);
|
||
plt[r_symndx].plt.refcount++;
|
||
}
|
||
h = NULL;
|
||
}
|
||
else
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
}
|
||
|
||
/* Create got section and local_got_refcounts array if they
|
||
are needed. */
|
||
r_type = elf_s390_tls_transition (info,
|
||
ELF64_R_TYPE (rel->r_info),
|
||
h == NULL);
|
||
switch (r_type)
|
||
{
|
||
case R_390_GOT12:
|
||
case R_390_GOT16:
|
||
case R_390_GOT20:
|
||
case R_390_GOT32:
|
||
case R_390_GOT64:
|
||
case R_390_GOTENT:
|
||
case R_390_GOTPLT12:
|
||
case R_390_GOTPLT16:
|
||
case R_390_GOTPLT20:
|
||
case R_390_GOTPLT32:
|
||
case R_390_GOTPLT64:
|
||
case R_390_GOTPLTENT:
|
||
case R_390_TLS_GD64:
|
||
case R_390_TLS_GOTIE12:
|
||
case R_390_TLS_GOTIE20:
|
||
case R_390_TLS_GOTIE64:
|
||
case R_390_TLS_IEENT:
|
||
case R_390_TLS_IE64:
|
||
case R_390_TLS_LDM64:
|
||
if (h == NULL
|
||
&& local_got_refcounts == NULL)
|
||
{
|
||
if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
|
||
return FALSE;
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
}
|
||
|
||
/* Fall through. */
|
||
case R_390_GOTOFF16:
|
||
case R_390_GOTOFF32:
|
||
case R_390_GOTOFF64:
|
||
case R_390_GOTPC:
|
||
case R_390_GOTPCDBL:
|
||
if (htab->elf.sgot == NULL)
|
||
{
|
||
if (htab->elf.dynobj == NULL)
|
||
htab->elf.dynobj = abfd;
|
||
if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
if (htab->elf.dynobj == NULL)
|
||
htab->elf.dynobj = abfd;
|
||
if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
|
||
return FALSE;
|
||
|
||
/* Make sure an IFUNC symbol defined in a non-shared object
|
||
always gets a PLT slot. */
|
||
if (s390_is_ifunc_symbol_p (h) && h->def_regular)
|
||
{
|
||
/* The symbol is called by the dynamic loader in order
|
||
to resolve the relocation. So it is in fact also
|
||
referenced. */
|
||
h->ref_regular = 1;
|
||
h->needs_plt = 1;
|
||
}
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_390_GOTPC:
|
||
case R_390_GOTPCDBL:
|
||
/* These relocs do not need a GOT slot. They just load the
|
||
GOT pointer itself or address something else relative to
|
||
the GOT. Since the GOT pointer has been set up above we
|
||
are done. */
|
||
break;
|
||
case R_390_GOTOFF16:
|
||
case R_390_GOTOFF32:
|
||
case R_390_GOTOFF64:
|
||
if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
|
||
break;
|
||
/* Fall through. */
|
||
|
||
case R_390_PLT12DBL:
|
||
case R_390_PLT16DBL:
|
||
case R_390_PLT24DBL:
|
||
case R_390_PLT32:
|
||
case R_390_PLT32DBL:
|
||
case R_390_PLT64:
|
||
case R_390_PLTOFF16:
|
||
case R_390_PLTOFF32:
|
||
case R_390_PLTOFF64:
|
||
/* This symbol requires a procedure linkage table entry. We
|
||
actually build the entry in adjust_dynamic_symbol,
|
||
because this might be a case of linking PIC code which is
|
||
never referenced by a dynamic object, in which case we
|
||
don't need to generate a procedure linkage table entry
|
||
after all. */
|
||
|
||
/* If this is a local symbol, we resolve it directly without
|
||
creating a procedure linkage table entry. */
|
||
if (h != NULL)
|
||
{
|
||
h->needs_plt = 1;
|
||
h->plt.refcount += 1;
|
||
}
|
||
break;
|
||
|
||
case R_390_GOTPLT12:
|
||
case R_390_GOTPLT16:
|
||
case R_390_GOTPLT20:
|
||
case R_390_GOTPLT32:
|
||
case R_390_GOTPLT64:
|
||
case R_390_GOTPLTENT:
|
||
/* This symbol requires either a procedure linkage table entry
|
||
or an entry in the local got. We actually build the entry
|
||
in adjust_dynamic_symbol because whether this is really a
|
||
global reference can change and with it the fact if we have
|
||
to create a plt entry or a local got entry. To be able to
|
||
make a once global symbol a local one we have to keep track
|
||
of the number of gotplt references that exist for this
|
||
symbol. */
|
||
if (h != NULL)
|
||
{
|
||
((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
|
||
h->needs_plt = 1;
|
||
h->plt.refcount += 1;
|
||
}
|
||
else
|
||
local_got_refcounts[r_symndx] += 1;
|
||
break;
|
||
|
||
case R_390_TLS_LDM64:
|
||
htab->tls_ldm_got.refcount += 1;
|
||
break;
|
||
|
||
case R_390_TLS_IE64:
|
||
case R_390_TLS_GOTIE12:
|
||
case R_390_TLS_GOTIE20:
|
||
case R_390_TLS_GOTIE64:
|
||
case R_390_TLS_IEENT:
|
||
if (bfd_link_pic (info))
|
||
info->flags |= DF_STATIC_TLS;
|
||
/* Fall through */
|
||
|
||
case R_390_GOT12:
|
||
case R_390_GOT16:
|
||
case R_390_GOT20:
|
||
case R_390_GOT32:
|
||
case R_390_GOT64:
|
||
case R_390_GOTENT:
|
||
case R_390_TLS_GD64:
|
||
/* This symbol requires a global offset table entry. */
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
case R_390_GOT12:
|
||
case R_390_GOT16:
|
||
case R_390_GOT20:
|
||
case R_390_GOT32:
|
||
case R_390_GOTENT:
|
||
tls_type = GOT_NORMAL;
|
||
break;
|
||
case R_390_TLS_GD64:
|
||
tls_type = GOT_TLS_GD;
|
||
break;
|
||
case R_390_TLS_IE64:
|
||
case R_390_TLS_GOTIE64:
|
||
tls_type = GOT_TLS_IE;
|
||
break;
|
||
case R_390_TLS_GOTIE12:
|
||
case R_390_TLS_GOTIE20:
|
||
case R_390_TLS_IEENT:
|
||
tls_type = GOT_TLS_IE_NLT;
|
||
break;
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
h->got.refcount += 1;
|
||
old_tls_type = elf_s390_hash_entry(h)->tls_type;
|
||
}
|
||
else
|
||
{
|
||
local_got_refcounts[r_symndx] += 1;
|
||
old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
|
||
}
|
||
/* If a TLS symbol is accessed using IE at least once,
|
||
there is no point to use dynamic model for it. */
|
||
if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
|
||
{
|
||
if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: `%s' accessed both as normal and thread local symbol"),
|
||
abfd, h->root.root.string);
|
||
return FALSE;
|
||
}
|
||
if (old_tls_type > tls_type)
|
||
tls_type = old_tls_type;
|
||
}
|
||
|
||
if (old_tls_type != tls_type)
|
||
{
|
||
if (h != NULL)
|
||
elf_s390_hash_entry (h)->tls_type = tls_type;
|
||
else
|
||
elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
|
||
}
|
||
|
||
if (r_type != R_390_TLS_IE64)
|
||
break;
|
||
/* Fall through */
|
||
|
||
case R_390_TLS_LE64:
|
||
/* For static linking and executables this reloc will be
|
||
calculated at linktime otherwise a TLS_TPOFF runtime
|
||
reloc will be generated. */
|
||
if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
|
||
break;
|
||
|
||
if (!bfd_link_pic (info))
|
||
break;
|
||
info->flags |= DF_STATIC_TLS;
|
||
/* Fall through */
|
||
|
||
case R_390_8:
|
||
case R_390_16:
|
||
case R_390_32:
|
||
case R_390_64:
|
||
case R_390_PC12DBL:
|
||
case R_390_PC16:
|
||
case R_390_PC16DBL:
|
||
case R_390_PC24DBL:
|
||
case R_390_PC32:
|
||
case R_390_PC32DBL:
|
||
case R_390_PC64:
|
||
if (h != NULL && bfd_link_executable (info))
|
||
{
|
||
/* If this reloc is in a read-only section, we might
|
||
need a copy reloc. We can't check reliably at this
|
||
stage whether the section is read-only, as input
|
||
sections have not yet been mapped to output sections.
|
||
Tentatively set the flag for now, and correct in
|
||
adjust_dynamic_symbol. */
|
||
h->non_got_ref = 1;
|
||
|
||
if (!bfd_link_pic (info))
|
||
{
|
||
/* We may need a .plt entry if the function this reloc
|
||
refers to is in a shared lib. */
|
||
h->plt.refcount += 1;
|
||
}
|
||
}
|
||
|
||
/* If we are creating a shared library, and this is a reloc
|
||
against a global symbol, or a non PC relative reloc
|
||
against a local symbol, then we need to copy the reloc
|
||
into the shared library. However, if we are linking with
|
||
-Bsymbolic, we do not need to copy a reloc against a
|
||
global symbol which is defined in an object we are
|
||
including in the link (i.e., DEF_REGULAR is set). At
|
||
this point we have not seen all the input files, so it is
|
||
possible that DEF_REGULAR is not set now but will be set
|
||
later (it is never cleared). In case of a weak definition,
|
||
DEF_REGULAR may be cleared later by a strong definition in
|
||
a shared library. We account for that possibility below by
|
||
storing information in the relocs_copied field of the hash
|
||
table entry. A similar situation occurs when creating
|
||
shared libraries and symbol visibility changes render the
|
||
symbol local.
|
||
|
||
If on the other hand, we are creating an executable, we
|
||
may need to keep relocations for symbols satisfied by a
|
||
dynamic library if we manage to avoid copy relocs for the
|
||
symbol. */
|
||
if ((bfd_link_pic (info)
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
|
||
&& ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
|
||
&& ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
|
||
&& ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
|
||
&& ELF64_R_TYPE (rel->r_info) != R_390_PC32
|
||
&& ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
|
||
&& ELF64_R_TYPE (rel->r_info) != R_390_PC64)
|
||
|| (h != NULL
|
||
&& (! SYMBOLIC_BIND (info, h)
|
||
|| h->root.type == bfd_link_hash_defweak
|
||
|| !h->def_regular))))
|
||
|| (ELIMINATE_COPY_RELOCS
|
||
&& !bfd_link_pic (info)
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& h != NULL
|
||
&& (h->root.type == bfd_link_hash_defweak
|
||
|| !h->def_regular)))
|
||
{
|
||
struct elf_dyn_relocs *p;
|
||
struct elf_dyn_relocs **head;
|
||
|
||
/* We must copy these reloc types into the output file.
|
||
Create a reloc section in dynobj and make room for
|
||
this reloc. */
|
||
if (sreloc == NULL)
|
||
{
|
||
if (htab->elf.dynobj == NULL)
|
||
htab->elf.dynobj = abfd;
|
||
|
||
sreloc = _bfd_elf_make_dynamic_reloc_section
|
||
(sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
|
||
|
||
if (sreloc == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
/* If this is a global symbol, we count the number of
|
||
relocations we need for this symbol. */
|
||
if (h != NULL)
|
||
{
|
||
head = &h->dyn_relocs;
|
||
}
|
||
else
|
||
{
|
||
/* Track dynamic relocs needed for local syms too.
|
||
We really need local syms available to do this
|
||
easily. Oh well. */
|
||
asection *s;
|
||
void *vpp;
|
||
|
||
isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
|
||
abfd, r_symndx);
|
||
if (isym == NULL)
|
||
return FALSE;
|
||
|
||
s = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
||
if (s == NULL)
|
||
s = sec;
|
||
|
||
vpp = &elf_section_data (s)->local_dynrel;
|
||
head = (struct elf_dyn_relocs **) vpp;
|
||
}
|
||
|
||
p = *head;
|
||
if (p == NULL || p->sec != sec)
|
||
{
|
||
size_t amt = sizeof *p;
|
||
p = ((struct elf_dyn_relocs *)
|
||
bfd_alloc (htab->elf.dynobj, amt));
|
||
if (p == NULL)
|
||
return FALSE;
|
||
p->next = *head;
|
||
*head = p;
|
||
p->sec = sec;
|
||
p->count = 0;
|
||
p->pc_count = 0;
|
||
}
|
||
|
||
p->count += 1;
|
||
if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
|
||
|| ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
|
||
|| ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
|
||
|| ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
|
||
|| ELF64_R_TYPE (rel->r_info) == R_390_PC32
|
||
|| ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
|
||
|| ELF64_R_TYPE (rel->r_info) == R_390_PC64)
|
||
p->pc_count += 1;
|
||
}
|
||
break;
|
||
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_390_GNU_VTINHERIT:
|
||
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return FALSE;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries are actually
|
||
used. Record for later use during GC. */
|
||
case R_390_GNU_VTENTRY:
|
||
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
elf_s390_gc_mark_hook (asection *sec,
|
||
struct bfd_link_info *info,
|
||
Elf_Internal_Rela *rel,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym *sym)
|
||
{
|
||
if (h != NULL)
|
||
switch (ELF64_R_TYPE (rel->r_info))
|
||
{
|
||
case R_390_GNU_VTINHERIT:
|
||
case R_390_GNU_VTENTRY:
|
||
return NULL;
|
||
}
|
||
|
||
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
||
}
|
||
|
||
/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
|
||
entry but we found we will not create any. Called when we find we will
|
||
not have any PLT for this symbol, by for example
|
||
elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
|
||
or elf_s390_size_dynamic_sections if no dynamic sections will be
|
||
created (we're only linking static objects). */
|
||
|
||
static void
|
||
elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
|
||
{
|
||
if (h->elf.root.type == bfd_link_hash_warning)
|
||
h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
|
||
|
||
if (h->gotplt_refcount <= 0)
|
||
return;
|
||
|
||
/* We simply add the number of gotplt references to the number
|
||
* of got references for this symbol. */
|
||
h->elf.got.refcount += h->gotplt_refcount;
|
||
h->gotplt_refcount = -1;
|
||
}
|
||
|
||
/* Adjust a symbol defined by a dynamic object and referenced by a
|
||
regular object. The current definition is in some section of the
|
||
dynamic object, but we're not including those sections. We have to
|
||
change the definition to something the rest of the link can
|
||
understand. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
asection *s, *srel;
|
||
|
||
/* STT_GNU_IFUNC symbol must go through PLT. */
|
||
if (s390_is_ifunc_symbol_p (h))
|
||
{
|
||
/* All local STT_GNU_IFUNC references must be treated as local
|
||
calls via local PLT. */
|
||
if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
|
||
{
|
||
bfd_size_type pc_count = 0, count = 0;
|
||
struct elf_dyn_relocs **pp;
|
||
struct elf_dyn_relocs *p;
|
||
|
||
for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
|
||
{
|
||
pc_count += p->pc_count;
|
||
p->count -= p->pc_count;
|
||
p->pc_count = 0;
|
||
count += p->count;
|
||
if (p->count == 0)
|
||
*pp = p->next;
|
||
else
|
||
pp = &p->next;
|
||
}
|
||
|
||
if (pc_count || count)
|
||
{
|
||
h->needs_plt = 1;
|
||
h->non_got_ref = 1;
|
||
if (h->plt.refcount <= 0)
|
||
h->plt.refcount = 1;
|
||
else
|
||
h->plt.refcount += 1;
|
||
}
|
||
}
|
||
|
||
if (h->plt.refcount <= 0)
|
||
{
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->needs_plt = 0;
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/* If this is a function, put it in the procedure linkage table. We
|
||
will fill in the contents of the procedure linkage table later
|
||
(although we could actually do it here). */
|
||
if (h->type == STT_FUNC
|
||
|| h->needs_plt)
|
||
{
|
||
if (h->plt.refcount <= 0
|
||
|| SYMBOL_CALLS_LOCAL (info, h)
|
||
|| UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
|
||
{
|
||
/* This case can occur if we saw a PLT32 reloc in an input
|
||
file, but the symbol was never referred to by a dynamic
|
||
object, or if all references were garbage collected. In
|
||
such a case, we don't actually need to build a procedure
|
||
linkage table, and we can just do a PC32 reloc instead. */
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->needs_plt = 0;
|
||
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
else
|
||
/* It's possible that we incorrectly decided a .plt reloc was
|
||
needed for an R_390_PC32 reloc to a non-function sym in
|
||
check_relocs. We can't decide accurately between function and
|
||
non-function syms in check-relocs; Objects loaded later in
|
||
the link may change h->type. So fix it now. */
|
||
h->plt.offset = (bfd_vma) -1;
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
if (h->is_weakalias)
|
||
{
|
||
struct elf_link_hash_entry *def = weakdef (h);
|
||
BFD_ASSERT (def->root.type == bfd_link_hash_defined);
|
||
h->root.u.def.section = def->root.u.def.section;
|
||
h->root.u.def.value = def->root.u.def.value;
|
||
if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
|
||
h->non_got_ref = def->non_got_ref;
|
||
return TRUE;
|
||
}
|
||
|
||
/* This is a reference to a symbol defined by a dynamic object which
|
||
is not a function. */
|
||
|
||
/* If we are creating a shared library, we must presume that the
|
||
only references to the symbol are via the global offset table.
|
||
For such cases we need not do anything here; the relocations will
|
||
be handled correctly by relocate_section. */
|
||
if (bfd_link_pic (info))
|
||
return TRUE;
|
||
|
||
/* If there are no references to this symbol that do not use the
|
||
GOT, we don't need to generate a copy reloc. */
|
||
if (!h->non_got_ref)
|
||
return TRUE;
|
||
|
||
/* If -z nocopyreloc was given, we won't generate them either. */
|
||
if (info->nocopyreloc)
|
||
{
|
||
h->non_got_ref = 0;
|
||
return TRUE;
|
||
}
|
||
|
||
/* If we don't find any dynamic relocs in read-only sections, then
|
||
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
|
||
if (ELIMINATE_COPY_RELOCS && !_bfd_elf_readonly_dynrelocs (h))
|
||
{
|
||
h->non_got_ref = 0;
|
||
return TRUE;
|
||
}
|
||
|
||
/* We must allocate the symbol in our .dynbss section, which will
|
||
become part of the .bss section of the executable. There will be
|
||
an entry for this symbol in the .dynsym section. The dynamic
|
||
object will contain position independent code, so all references
|
||
from the dynamic object to this symbol will go through the global
|
||
offset table. The dynamic linker will use the .dynsym entry to
|
||
determine the address it must put in the global offset table, so
|
||
both the dynamic object and the regular object will refer to the
|
||
same memory location for the variable. */
|
||
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
/* We must generate a R_390_COPY reloc to tell the dynamic linker to
|
||
copy the initial value out of the dynamic object and into the
|
||
runtime process image. */
|
||
if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
|
||
{
|
||
s = htab->elf.sdynrelro;
|
||
srel = htab->elf.sreldynrelro;
|
||
}
|
||
else
|
||
{
|
||
s = htab->elf.sdynbss;
|
||
srel = htab->elf.srelbss;
|
||
}
|
||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
|
||
{
|
||
srel->size += sizeof (Elf64_External_Rela);
|
||
h->needs_copy = 1;
|
||
}
|
||
|
||
return _bfd_elf_adjust_dynamic_copy (info, h, s);
|
||
}
|
||
|
||
/* Allocate space in .plt, .got and associated reloc sections for
|
||
dynamic relocs. */
|
||
|
||
static bfd_boolean
|
||
allocate_dynrelocs (struct elf_link_hash_entry *h,
|
||
void * inf)
|
||
{
|
||
struct bfd_link_info *info;
|
||
struct elf_s390_link_hash_table *htab;
|
||
struct elf_dyn_relocs *p;
|
||
|
||
if (h->root.type == bfd_link_hash_indirect)
|
||
return TRUE;
|
||
|
||
info = (struct bfd_link_info *) inf;
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
|
||
here if it is defined and referenced in a non-shared object. */
|
||
if (s390_is_ifunc_symbol_p (h) && h->def_regular)
|
||
return s390_elf_allocate_ifunc_dyn_relocs (info, h);
|
||
else if (htab->elf.dynamic_sections_created
|
||
&& h->plt.refcount > 0)
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol.
|
||
Undefined weak syms won't yet be marked as dynamic. */
|
||
if (h->dynindx == -1
|
||
&& !h->forced_local)
|
||
{
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
if (bfd_link_pic (info)
|
||
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
|
||
{
|
||
asection *s = htab->elf.splt;
|
||
|
||
/* If this is the first .plt entry, make room for the special
|
||
first entry. */
|
||
if (s->size == 0)
|
||
s->size += PLT_FIRST_ENTRY_SIZE;
|
||
|
||
h->plt.offset = s->size;
|
||
|
||
/* If this symbol is not defined in a regular file, and we are
|
||
not generating a shared library, then set the symbol to this
|
||
location in the .plt. This is required to make function
|
||
pointers compare as equal between the normal executable and
|
||
the shared library. */
|
||
if (! bfd_link_pic (info)
|
||
&& !h->def_regular)
|
||
{
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = h->plt.offset;
|
||
}
|
||
|
||
/* Make room for this entry. */
|
||
s->size += PLT_ENTRY_SIZE;
|
||
|
||
/* We also need to make an entry in the .got.plt section. */
|
||
htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
|
||
|
||
/* We also need to make an entry in the .rela.plt section. */
|
||
htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
|
||
}
|
||
else
|
||
{
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->needs_plt = 0;
|
||
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->needs_plt = 0;
|
||
elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
|
||
}
|
||
|
||
/* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
|
||
the binary, we can optimize a bit. IE64 and GOTIE64 get converted
|
||
to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
|
||
we can save the dynamic TLS relocation. */
|
||
if (h->got.refcount > 0
|
||
&& !bfd_link_pic (info)
|
||
&& h->dynindx == -1
|
||
&& elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
|
||
{
|
||
if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
|
||
/* For the GOTIE access without a literal pool entry the offset has
|
||
to be stored somewhere. The immediate value in the instruction
|
||
is not bit enough so the value is stored in the got. */
|
||
{
|
||
h->got.offset = htab->elf.sgot->size;
|
||
htab->elf.sgot->size += GOT_ENTRY_SIZE;
|
||
}
|
||
else
|
||
h->got.offset = (bfd_vma) -1;
|
||
}
|
||
else if (h->got.refcount > 0)
|
||
{
|
||
asection *s;
|
||
bfd_boolean dyn;
|
||
int tls_type = elf_s390_hash_entry(h)->tls_type;
|
||
|
||
/* Make sure this symbol is output as a dynamic symbol.
|
||
Undefined weak syms won't yet be marked as dynamic. */
|
||
if (h->dynindx == -1
|
||
&& !h->forced_local)
|
||
{
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
s = htab->elf.sgot;
|
||
h->got.offset = s->size;
|
||
s->size += GOT_ENTRY_SIZE;
|
||
/* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
|
||
if (tls_type == GOT_TLS_GD)
|
||
s->size += GOT_ENTRY_SIZE;
|
||
dyn = htab->elf.dynamic_sections_created;
|
||
/* R_390_TLS_IE64 needs one dynamic relocation,
|
||
R_390_TLS_GD64 needs one if local symbol and two if global. */
|
||
if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
|
||
|| tls_type >= GOT_TLS_IE)
|
||
htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
|
||
else if (tls_type == GOT_TLS_GD)
|
||
htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
|
||
else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
|
||
&& (bfd_link_pic (info)
|
||
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
|
||
htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
|
||
}
|
||
else
|
||
h->got.offset = (bfd_vma) -1;
|
||
|
||
if (h->dyn_relocs == NULL)
|
||
return TRUE;
|
||
|
||
/* In the shared -Bsymbolic case, discard space allocated for
|
||
dynamic pc-relative relocs against symbols which turn out to be
|
||
defined in regular objects. For the normal shared case, discard
|
||
space for pc-relative relocs that have become local due to symbol
|
||
visibility changes. */
|
||
|
||
if (bfd_link_pic (info))
|
||
{
|
||
if (SYMBOL_CALLS_LOCAL (info, h))
|
||
{
|
||
struct elf_dyn_relocs **pp;
|
||
|
||
for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
|
||
{
|
||
p->count -= p->pc_count;
|
||
p->pc_count = 0;
|
||
if (p->count == 0)
|
||
*pp = p->next;
|
||
else
|
||
pp = &p->next;
|
||
}
|
||
}
|
||
|
||
/* Also discard relocs on undefined weak syms with non-default
|
||
visibility. */
|
||
if (h->dyn_relocs != NULL
|
||
&& h->root.type == bfd_link_hash_undefweak)
|
||
{
|
||
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
|
||
|| UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
|
||
h->dyn_relocs = NULL;
|
||
|
||
/* Make sure undefined weak symbols are output as a dynamic
|
||
symbol in PIEs. */
|
||
else if (h->dynindx == -1
|
||
&& !h->forced_local)
|
||
{
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
}
|
||
}
|
||
else if (ELIMINATE_COPY_RELOCS)
|
||
{
|
||
/* For the non-shared case, discard space for relocs against
|
||
symbols which turn out to need copy relocs or are not
|
||
dynamic. */
|
||
|
||
if (!h->non_got_ref
|
||
&& ((h->def_dynamic
|
||
&& !h->def_regular)
|
||
|| (htab->elf.dynamic_sections_created
|
||
&& (h->root.type == bfd_link_hash_undefweak
|
||
|| h->root.type == bfd_link_hash_undefined))))
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol.
|
||
Undefined weak syms won't yet be marked as dynamic. */
|
||
if (h->dynindx == -1
|
||
&& !h->forced_local)
|
||
{
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
/* If that succeeded, we know we'll be keeping all the
|
||
relocs. */
|
||
if (h->dynindx != -1)
|
||
goto keep;
|
||
}
|
||
|
||
h->dyn_relocs = NULL;
|
||
|
||
keep: ;
|
||
}
|
||
|
||
/* Finally, allocate space. */
|
||
for (p = h->dyn_relocs; p != NULL; p = p->next)
|
||
{
|
||
asection *sreloc = elf_section_data (p->sec)->sreloc;
|
||
sreloc->size += p->count * sizeof (Elf64_External_Rela);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
bfd *dynobj;
|
||
asection *s;
|
||
bfd_boolean relocs;
|
||
bfd *ibfd;
|
||
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
dynobj = htab->elf.dynobj;
|
||
if (dynobj == NULL)
|
||
abort ();
|
||
|
||
if (htab->elf.dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (bfd_link_executable (info) && !info->nointerp)
|
||
{
|
||
s = bfd_get_linker_section (dynobj, ".interp");
|
||
if (s == NULL)
|
||
abort ();
|
||
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
}
|
||
|
||
if (htab->elf.sgot && s390_gotplt_after_got_p (info))
|
||
{
|
||
/* _bfd_elf_create_got_section adds the got header size always
|
||
to .got.plt but we need it in .got if this section comes
|
||
first. */
|
||
htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
|
||
htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
|
||
|
||
/* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
|
||
instead of .got.plt. */
|
||
htab->elf.hgot->root.u.def.section = htab->elf.sgot;
|
||
htab->elf.hgot->root.u.def.value = 0;
|
||
}
|
||
|
||
/* Set up .got offsets for local syms, and space for local dynamic
|
||
relocs. */
|
||
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
|
||
{
|
||
bfd_signed_vma *local_got;
|
||
bfd_signed_vma *end_local_got;
|
||
char *local_tls_type;
|
||
bfd_size_type locsymcount;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
asection *srela;
|
||
struct plt_entry *local_plt;
|
||
unsigned int i;
|
||
|
||
if (! is_s390_elf (ibfd))
|
||
continue;
|
||
|
||
for (s = ibfd->sections; s != NULL; s = s->next)
|
||
{
|
||
struct elf_dyn_relocs *p;
|
||
|
||
for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
|
||
{
|
||
if (!bfd_is_abs_section (p->sec)
|
||
&& bfd_is_abs_section (p->sec->output_section))
|
||
{
|
||
/* Input section has been discarded, either because
|
||
it is a copy of a linkonce section or due to
|
||
linker script /DISCARD/, so we'll be discarding
|
||
the relocs too. */
|
||
}
|
||
else if (p->count != 0)
|
||
{
|
||
srela = elf_section_data (p->sec)->sreloc;
|
||
srela->size += p->count * sizeof (Elf64_External_Rela);
|
||
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
|
||
info->flags |= DF_TEXTREL;
|
||
}
|
||
}
|
||
}
|
||
|
||
local_got = elf_local_got_refcounts (ibfd);
|
||
if (!local_got)
|
||
continue;
|
||
|
||
symtab_hdr = &elf_symtab_hdr (ibfd);
|
||
locsymcount = symtab_hdr->sh_info;
|
||
end_local_got = local_got + locsymcount;
|
||
local_tls_type = elf_s390_local_got_tls_type (ibfd);
|
||
s = htab->elf.sgot;
|
||
srela = htab->elf.srelgot;
|
||
for (; local_got < end_local_got; ++local_got, ++local_tls_type)
|
||
{
|
||
if (*local_got > 0)
|
||
{
|
||
*local_got = s->size;
|
||
s->size += GOT_ENTRY_SIZE;
|
||
if (*local_tls_type == GOT_TLS_GD)
|
||
s->size += GOT_ENTRY_SIZE;
|
||
if (bfd_link_pic (info))
|
||
srela->size += sizeof (Elf64_External_Rela);
|
||
}
|
||
else
|
||
*local_got = (bfd_vma) -1;
|
||
}
|
||
|
||
local_plt = elf_s390_local_plt (ibfd);
|
||
for (i = 0; i < symtab_hdr->sh_info; i++)
|
||
{
|
||
if (local_plt[i].plt.refcount > 0)
|
||
{
|
||
local_plt[i].plt.offset = htab->elf.iplt->size;
|
||
htab->elf.iplt->size += PLT_ENTRY_SIZE;
|
||
htab->elf.igotplt->size += GOT_ENTRY_SIZE;
|
||
htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
|
||
}
|
||
else
|
||
local_plt[i].plt.offset = (bfd_vma) -1;
|
||
}
|
||
}
|
||
|
||
if (htab->tls_ldm_got.refcount > 0)
|
||
{
|
||
/* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
|
||
relocs. */
|
||
htab->tls_ldm_got.offset = htab->elf.sgot->size;
|
||
htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
|
||
htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
|
||
}
|
||
else
|
||
htab->tls_ldm_got.offset = -1;
|
||
|
||
/* Allocate global sym .plt and .got entries, and space for global
|
||
sym dynamic relocs. */
|
||
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
|
||
|
||
/* We now have determined the sizes of the various dynamic sections.
|
||
Allocate memory for them. */
|
||
relocs = FALSE;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
||
continue;
|
||
|
||
if (s == htab->elf.splt
|
||
|| s == htab->elf.sgot
|
||
|| s == htab->elf.sgotplt
|
||
|| s == htab->elf.sdynbss
|
||
|| s == htab->elf.sdynrelro
|
||
|| s == htab->elf.iplt
|
||
|| s == htab->elf.igotplt
|
||
|| s == htab->irelifunc)
|
||
{
|
||
/* Strip this section if we don't need it; see the
|
||
comment below. */
|
||
}
|
||
else if (CONST_STRNEQ (bfd_section_name (s), ".rela"))
|
||
{
|
||
if (s->size != 0 && s != htab->elf.srelplt)
|
||
relocs = TRUE;
|
||
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
s->reloc_count = 0;
|
||
}
|
||
else
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (s->size == 0)
|
||
{
|
||
/* If we don't need this section, strip it from the
|
||
output file. This is to handle .rela.bss and
|
||
.rela.plt. We must create it in
|
||
create_dynamic_sections, because it must be created
|
||
before the linker maps input sections to output
|
||
sections. The linker does that before
|
||
adjust_dynamic_symbol is called, and it is that
|
||
function which decides whether anything needs to go
|
||
into these sections. */
|
||
|
||
s->flags |= SEC_EXCLUDE;
|
||
continue;
|
||
}
|
||
|
||
if ((s->flags & SEC_HAS_CONTENTS) == 0)
|
||
continue;
|
||
|
||
/* Allocate memory for the section contents. We use bfd_zalloc
|
||
here in case unused entries are not reclaimed before the
|
||
section's contents are written out. This should not happen,
|
||
but this way if it does, we get a R_390_NONE reloc instead
|
||
of garbage. */
|
||
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
|
||
if (s->contents == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
|
||
}
|
||
|
||
/* Return the base VMA address which should be subtracted from real addresses
|
||
when resolving @dtpoff relocation.
|
||
This is PT_TLS segment p_vaddr. */
|
||
|
||
static bfd_vma
|
||
dtpoff_base (struct bfd_link_info *info)
|
||
{
|
||
/* If tls_sec is NULL, we should have signalled an error already. */
|
||
if (elf_hash_table (info)->tls_sec == NULL)
|
||
return 0;
|
||
return elf_hash_table (info)->tls_sec->vma;
|
||
}
|
||
|
||
/* Return the relocation value for @tpoff relocation
|
||
if STT_TLS virtual address is ADDRESS. */
|
||
|
||
static bfd_vma
|
||
tpoff (struct bfd_link_info *info, bfd_vma address)
|
||
{
|
||
struct elf_link_hash_table *htab = elf_hash_table (info);
|
||
|
||
/* If tls_sec is NULL, we should have signalled an error already. */
|
||
if (htab->tls_sec == NULL)
|
||
return 0;
|
||
return htab->tls_size + htab->tls_sec->vma - address;
|
||
}
|
||
|
||
/* Complain if TLS instruction relocation is against an invalid
|
||
instruction. */
|
||
|
||
static void
|
||
invalid_tls_insn (bfd *input_bfd,
|
||
asection *input_section,
|
||
Elf_Internal_Rela *rel)
|
||
{
|
||
reloc_howto_type *howto;
|
||
|
||
howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
|
||
input_bfd,
|
||
input_section,
|
||
(uint64_t) rel->r_offset,
|
||
howto->name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
}
|
||
|
||
/* Relocate a 390 ELF section. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_relocate_section (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
bfd *input_bfd,
|
||
asection *input_section,
|
||
bfd_byte *contents,
|
||
Elf_Internal_Rela *relocs,
|
||
Elf_Internal_Sym *local_syms,
|
||
asection **local_sections)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_vma *local_got_offsets;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
|
||
if (!is_s390_elf (input_bfd))
|
||
{
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return FALSE;
|
||
}
|
||
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
symtab_hdr = &elf_symtab_hdr (input_bfd);
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
unsigned int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
bfd_vma off;
|
||
bfd_vma relocation;
|
||
bfd_boolean unresolved_reloc;
|
||
bfd_reloc_status_type r;
|
||
int tls_type;
|
||
bfd_boolean resolved_to_zero;
|
||
|
||
r_type = ELF64_R_TYPE (rel->r_info);
|
||
if (r_type == (int) R_390_GNU_VTINHERIT
|
||
|| r_type == (int) R_390_GNU_VTENTRY)
|
||
continue;
|
||
if (r_type >= (int) R_390_max)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
howto = elf_howto_table + r_type;
|
||
r_symndx = ELF64_R_SYM (rel->r_info);
|
||
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
unresolved_reloc = FALSE;
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
|
||
if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
|
||
{
|
||
struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
|
||
if (local_plt == NULL)
|
||
return FALSE;
|
||
|
||
/* Address of the PLT slot. */
|
||
relocation = (htab->elf.iplt->output_section->vma
|
||
+ htab->elf.iplt->output_offset
|
||
+ local_plt[r_symndx].plt.offset);
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_390_PLTOFF16:
|
||
case R_390_PLTOFF32:
|
||
case R_390_PLTOFF64:
|
||
relocation -= s390_got_pointer (info);
|
||
break;
|
||
case R_390_GOTPLT12:
|
||
case R_390_GOTPLT16:
|
||
case R_390_GOTPLT20:
|
||
case R_390_GOTPLT32:
|
||
case R_390_GOTPLT64:
|
||
case R_390_GOTPLTENT:
|
||
case R_390_GOT12:
|
||
case R_390_GOT16:
|
||
case R_390_GOT20:
|
||
case R_390_GOT32:
|
||
case R_390_GOT64:
|
||
case R_390_GOTENT:
|
||
{
|
||
/* Write the PLT slot address into the GOT slot. */
|
||
bfd_put_64 (output_bfd, relocation,
|
||
htab->elf.sgot->contents +
|
||
local_got_offsets[r_symndx]);
|
||
relocation = (local_got_offsets[r_symndx] +
|
||
s390_got_offset (info));
|
||
|
||
if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
|
||
relocation += s390_got_pointer (info);
|
||
break;
|
||
}
|
||
default:
|
||
break;
|
||
}
|
||
/* The output section is needed later in
|
||
finish_dynamic_section when creating the dynamic
|
||
relocation. */
|
||
local_plt[r_symndx].sec = sec;
|
||
goto do_relocation;
|
||
}
|
||
else
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
||
}
|
||
else
|
||
{
|
||
bfd_boolean warned ATTRIBUTE_UNUSED;
|
||
bfd_boolean ignored ATTRIBUTE_UNUSED;
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned, ignored);
|
||
}
|
||
|
||
if (sec != NULL && discarded_section (sec))
|
||
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
||
rel, 1, relend, howto, 0, contents);
|
||
|
||
if (bfd_link_relocatable (info))
|
||
continue;
|
||
|
||
resolved_to_zero = (h != NULL
|
||
&& UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_390_GOTPLT12:
|
||
case R_390_GOTPLT16:
|
||
case R_390_GOTPLT20:
|
||
case R_390_GOTPLT32:
|
||
case R_390_GOTPLT64:
|
||
case R_390_GOTPLTENT:
|
||
/* There are three cases for a GOTPLT relocation. 1) The
|
||
relocation is against the jump slot entry of a plt that
|
||
will get emitted to the output file. 2) The relocation
|
||
is against the jump slot of a plt entry that has been
|
||
removed. elf_s390_adjust_gotplt has created a GOT entry
|
||
as replacement. 3) The relocation is against a local symbol.
|
||
Cases 2) and 3) are the same as the GOT relocation code
|
||
so we just have to test for case 1 and fall through for
|
||
the other two. */
|
||
if (h != NULL && h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
bfd_vma plt_index;
|
||
|
||
if (s390_is_ifunc_symbol_p (h))
|
||
{
|
||
/* Entry indices of .iplt and .igot.plt match
|
||
1:1. No magic PLT first entry here. */
|
||
plt_index = h->plt.offset / PLT_ENTRY_SIZE;
|
||
relocation = (plt_index * GOT_ENTRY_SIZE
|
||
+ s390_gotplt_offset (info)
|
||
+ htab->elf.igotplt->output_offset);
|
||
}
|
||
else
|
||
{
|
||
plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
|
||
/ PLT_ENTRY_SIZE);
|
||
|
||
relocation = (plt_index * GOT_ENTRY_SIZE
|
||
+ s390_gotplt_offset (info));
|
||
}
|
||
if (r_type == R_390_GOTPLTENT)
|
||
relocation += s390_got_pointer (info);
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
}
|
||
/* Fall through. */
|
||
|
||
case R_390_GOT12:
|
||
case R_390_GOT16:
|
||
case R_390_GOT20:
|
||
case R_390_GOT32:
|
||
case R_390_GOT64:
|
||
case R_390_GOTENT:
|
||
/* Relocation is to the entry for this symbol in the global
|
||
offset table. */
|
||
if (htab->elf.sgot == NULL)
|
||
abort ();
|
||
|
||
if (h != NULL)
|
||
{
|
||
bfd_boolean dyn;
|
||
|
||
off = h->got.offset;
|
||
dyn = htab->elf.dynamic_sections_created;
|
||
|
||
if (s390_is_ifunc_symbol_p (h))
|
||
{
|
||
BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
|
||
if (off == (bfd_vma)-1)
|
||
{
|
||
/* No explicit GOT usage so redirect to the
|
||
got.iplt slot. */
|
||
relocation = (s390_gotplt_offset (info)
|
||
+ htab->elf.igotplt->output_offset
|
||
+ (h->plt.offset / PLT_ENTRY_SIZE
|
||
* GOT_ENTRY_SIZE));
|
||
|
||
/* For @GOTENT the relocation is against the offset between
|
||
the instruction and the symbols entry in the GOT and not
|
||
between the start of the GOT and the symbols entry. We
|
||
add the vma of the GOT to get the correct value. */
|
||
if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
|
||
relocation += s390_got_pointer (info);
|
||
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
/* Explicit GOT slots must contain the address
|
||
of the PLT slot. This will be handled in
|
||
finish_dynamic_symbol. */
|
||
}
|
||
}
|
||
else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
|
||
bfd_link_pic (info),
|
||
h)
|
||
|| (bfd_link_pic (info)
|
||
&& SYMBOL_REFERENCES_LOCAL (info, h))
|
||
|| resolved_to_zero)
|
||
{
|
||
Elf_Internal_Sym *isym;
|
||
asection *sym_sec;
|
||
|
||
/* This is actually a static link, or it is a
|
||
-Bsymbolic link and the symbol is defined
|
||
locally, or the symbol was forced to be local
|
||
because of a version file. We must initialize
|
||
this entry in the global offset table. Since the
|
||
offset must always be a multiple of 2, we use the
|
||
least significant bit to record whether we have
|
||
initialized it already.
|
||
|
||
When doing a dynamic link, we create a .rel.got
|
||
relocation entry to initialize the value. This
|
||
is done in the finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_64 (output_bfd, relocation,
|
||
htab->elf.sgot->contents + off);
|
||
h->got.offset |= 1;
|
||
}
|
||
|
||
/* When turning a GOT slot dereference into a direct
|
||
reference using larl we have to make sure that
|
||
the symbol is 1. properly aligned and 2. it is no
|
||
ABS symbol or will become one. */
|
||
if ((h->def_regular
|
||
&& bfd_link_pic (info)
|
||
&& SYMBOL_REFERENCES_LOCAL (info, h))
|
||
/* lgrl rx,sym@GOTENT -> larl rx, sym */
|
||
&& ((r_type == R_390_GOTENT
|
||
&& (bfd_get_16 (input_bfd,
|
||
contents + rel->r_offset - 2)
|
||
& 0xff0f) == 0xc408)
|
||
/* lg rx, sym@GOT(r12) -> larl rx, sym */
|
||
|| (r_type == R_390_GOT20
|
||
&& (bfd_get_32 (input_bfd,
|
||
contents + rel->r_offset - 2)
|
||
& 0xff00f000) == 0xe300c000
|
||
&& bfd_get_8 (input_bfd,
|
||
contents + rel->r_offset + 3) == 0x04))
|
||
&& (isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
|
||
input_bfd, r_symndx))
|
||
&& isym->st_shndx != SHN_ABS
|
||
&& h != htab->elf.hdynamic
|
||
&& h != htab->elf.hgot
|
||
&& h != htab->elf.hplt
|
||
&& !(isym->st_value & 1)
|
||
&& (sym_sec = bfd_section_from_elf_index (input_bfd,
|
||
isym->st_shndx))
|
||
&& sym_sec->alignment_power)
|
||
{
|
||
unsigned short new_insn =
|
||
(0xc000 | (bfd_get_8 (input_bfd,
|
||
contents + rel->r_offset - 1) & 0xf0));
|
||
bfd_put_16 (output_bfd, new_insn,
|
||
contents + rel->r_offset - 2);
|
||
r_type = R_390_PC32DBL;
|
||
rel->r_addend = 2;
|
||
howto = elf_howto_table + r_type;
|
||
relocation = h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset;
|
||
goto do_relocation;
|
||
}
|
||
}
|
||
else
|
||
unresolved_reloc = FALSE;
|
||
}
|
||
else
|
||
{
|
||
if (local_got_offsets == NULL)
|
||
abort ();
|
||
|
||
off = local_got_offsets[r_symndx];
|
||
|
||
/* The offset must always be a multiple of 8. We use
|
||
the least significant bit to record whether we have
|
||
already generated the necessary reloc. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_64 (output_bfd, relocation,
|
||
htab->elf.sgot->contents + off);
|
||
|
||
if (bfd_link_pic (info))
|
||
{
|
||
asection *s;
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
|
||
s = htab->elf.srelgot;
|
||
if (s == NULL)
|
||
abort ();
|
||
|
||
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset
|
||
+ off);
|
||
outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
|
||
outrel.r_addend = relocation;
|
||
loc = s->contents;
|
||
loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
}
|
||
|
||
if (off >= (bfd_vma) -2)
|
||
abort ();
|
||
|
||
relocation = s390_got_offset (info) + off;
|
||
|
||
/* For @GOTENT the relocation is against the offset between
|
||
the instruction and the symbols entry in the GOT and not
|
||
between the start of the GOT and the symbols entry. We
|
||
add the vma of the GOT to get the correct value. */
|
||
if ( r_type == R_390_GOTENT
|
||
|| r_type == R_390_GOTPLTENT)
|
||
relocation += s390_got_pointer (info);
|
||
|
||
break;
|
||
|
||
case R_390_GOTOFF16:
|
||
case R_390_GOTOFF32:
|
||
case R_390_GOTOFF64:
|
||
/* Relocation is relative to the start of the global offset
|
||
table. */
|
||
|
||
if (h != NULL
|
||
&& s390_is_ifunc_symbol_p (h)
|
||
&& h->def_regular
|
||
&& !bfd_link_executable (info))
|
||
{
|
||
relocation = (htab->elf.iplt->output_section->vma
|
||
+ htab->elf.iplt->output_offset
|
||
+ h->plt.offset
|
||
- s390_got_pointer (info));
|
||
goto do_relocation;
|
||
}
|
||
|
||
relocation -= s390_got_pointer (info);
|
||
break;
|
||
|
||
case R_390_GOTPC:
|
||
case R_390_GOTPCDBL:
|
||
/* Use global offset table as symbol value. */
|
||
relocation = s390_got_pointer (info);
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
|
||
case R_390_PLT12DBL:
|
||
case R_390_PLT16DBL:
|
||
case R_390_PLT24DBL:
|
||
case R_390_PLT32:
|
||
case R_390_PLT32DBL:
|
||
case R_390_PLT64:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table. */
|
||
|
||
/* Resolve a PLT32 reloc against a local symbol directly,
|
||
without using the procedure linkage table. */
|
||
if (h == NULL)
|
||
break;
|
||
|
||
if (h->plt.offset == (bfd_vma) -1
|
||
|| (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
|
||
{
|
||
/* We didn't make a PLT entry for this symbol. This
|
||
happens when statically linking PIC code, or when
|
||
using -Bsymbolic. */
|
||
break;
|
||
}
|
||
if (s390_is_ifunc_symbol_p (h))
|
||
relocation = (htab->elf.iplt->output_section->vma
|
||
+ htab->elf.iplt->output_offset
|
||
+ h->plt.offset);
|
||
else
|
||
relocation = (htab->elf.splt->output_section->vma
|
||
+ htab->elf.splt->output_offset
|
||
+ h->plt.offset);
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
|
||
case R_390_PLTOFF16:
|
||
case R_390_PLTOFF32:
|
||
case R_390_PLTOFF64:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table relative to the start of the GOT. */
|
||
|
||
/* For local symbols or if we didn't make a PLT entry for
|
||
this symbol resolve the symbol directly. */
|
||
if (h == NULL
|
||
|| h->plt.offset == (bfd_vma) -1
|
||
|| (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
|
||
{
|
||
relocation -= s390_got_pointer (info);
|
||
break;
|
||
}
|
||
|
||
if (s390_is_ifunc_symbol_p (h))
|
||
relocation = (htab->elf.iplt->output_section->vma
|
||
+ htab->elf.iplt->output_offset
|
||
+ h->plt.offset
|
||
- s390_got_pointer (info));
|
||
else
|
||
relocation = (htab->elf.splt->output_section->vma
|
||
+ htab->elf.splt->output_offset
|
||
+ h->plt.offset
|
||
- s390_got_pointer (info));
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
|
||
case R_390_PC16:
|
||
case R_390_PC12DBL:
|
||
case R_390_PC16DBL:
|
||
case R_390_PC24DBL:
|
||
case R_390_PC32:
|
||
case R_390_PC32DBL:
|
||
case R_390_PC64:
|
||
if (h != NULL
|
||
&& bfd_link_pie (info)
|
||
&& !h->def_regular)
|
||
{
|
||
_bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
|
||
"in shared library and accessed "
|
||
"from executable "
|
||
"(rebuild file with -fPIC ?)"),
|
||
input_bfd, h->root.root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
/* The target of these relocs are instruction operands
|
||
residing in read-only sections. We cannot emit a runtime
|
||
reloc for it. */
|
||
if (h != NULL
|
||
&& s390_is_ifunc_symbol_p (h)
|
||
&& h->def_regular
|
||
&& bfd_link_pic (info))
|
||
{
|
||
relocation = (htab->elf.iplt->output_section->vma
|
||
+ htab->elf.iplt->output_offset
|
||
+ h->plt.offset);
|
||
goto do_relocation;
|
||
}
|
||
/* Fall through. */
|
||
|
||
case R_390_8:
|
||
case R_390_16:
|
||
case R_390_32:
|
||
case R_390_64:
|
||
|
||
if ((input_section->flags & SEC_ALLOC) == 0)
|
||
break;
|
||
|
||
if (h != NULL
|
||
&& s390_is_ifunc_symbol_p (h)
|
||
&& h->def_regular)
|
||
{
|
||
if (!bfd_link_pic (info))
|
||
{
|
||
/* For a non-shared object the symbol will not
|
||
change. Hence we can write the address of the
|
||
target IPLT slot now. */
|
||
relocation = (htab->elf.iplt->output_section->vma
|
||
+ htab->elf.iplt->output_offset
|
||
+ h ->plt.offset);
|
||
goto do_relocation;
|
||
}
|
||
else
|
||
{
|
||
/* For shared objects a runtime relocation is needed. */
|
||
|
||
Elf_Internal_Rela outrel;
|
||
asection *sreloc;
|
||
|
||
/* Need a dynamic relocation to get the real function
|
||
address. */
|
||
outrel.r_offset = _bfd_elf_section_offset (output_bfd,
|
||
info,
|
||
input_section,
|
||
rel->r_offset);
|
||
if (outrel.r_offset == (bfd_vma) -1
|
||
|| outrel.r_offset == (bfd_vma) -2)
|
||
abort ();
|
||
|
||
outrel.r_offset += (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
if (h->dynindx == -1
|
||
|| h->forced_local
|
||
|| bfd_link_executable (info))
|
||
{
|
||
/* This symbol is resolved locally. */
|
||
outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
|
||
outrel.r_addend = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
}
|
||
else
|
||
{
|
||
outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
|
||
outrel.r_addend = 0;
|
||
}
|
||
|
||
sreloc = htab->elf.irelifunc;
|
||
elf_append_rela (output_bfd, sreloc, &outrel);
|
||
|
||
/* If this reloc is against an external symbol, we
|
||
do not want to fiddle with the addend. Otherwise,
|
||
we need to include the symbol value so that it
|
||
becomes an addend for the dynamic reloc. For an
|
||
internal symbol, we have updated addend. */
|
||
continue;
|
||
}
|
||
}
|
||
|
||
if ((bfd_link_pic (info)
|
||
&& (h == NULL
|
||
|| (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
||
&& !resolved_to_zero)
|
||
|| h->root.type != bfd_link_hash_undefweak)
|
||
&& ((r_type != R_390_PC16
|
||
&& r_type != R_390_PC12DBL
|
||
&& r_type != R_390_PC16DBL
|
||
&& r_type != R_390_PC24DBL
|
||
&& r_type != R_390_PC32
|
||
&& r_type != R_390_PC32DBL
|
||
&& r_type != R_390_PC64)
|
||
|| !SYMBOL_CALLS_LOCAL (info, h)))
|
||
|| (ELIMINATE_COPY_RELOCS
|
||
&& !bfd_link_pic (info)
|
||
&& h != NULL
|
||
&& h->dynindx != -1
|
||
&& !h->non_got_ref
|
||
&& ((h->def_dynamic
|
||
&& !h->def_regular)
|
||
|| h->root.type == bfd_link_hash_undefweak
|
||
|| h->root.type == bfd_link_hash_undefined)))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_boolean skip, relocate;
|
||
asection *sreloc;
|
||
bfd_byte *loc;
|
||
|
||
/* When generating a shared object, these relocations
|
||
are copied into the output file to be resolved at run
|
||
time. */
|
||
skip = FALSE;
|
||
relocate = FALSE;
|
||
|
||
outrel.r_offset =
|
||
_bfd_elf_section_offset (output_bfd, info, input_section,
|
||
rel->r_offset);
|
||
if (outrel.r_offset == (bfd_vma) -1)
|
||
skip = TRUE;
|
||
else if (outrel.r_offset == (bfd_vma) -2)
|
||
skip = TRUE, relocate = TRUE;
|
||
|
||
outrel.r_offset += (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
if (skip)
|
||
memset (&outrel, 0, sizeof outrel);
|
||
else if (h != NULL
|
||
&& h->dynindx != -1
|
||
&& (r_type == R_390_PC16
|
||
|| r_type == R_390_PC12DBL
|
||
|| r_type == R_390_PC16DBL
|
||
|| r_type == R_390_PC24DBL
|
||
|| r_type == R_390_PC32
|
||
|| r_type == R_390_PC32DBL
|
||
|| r_type == R_390_PC64
|
||
|| !bfd_link_pic (info)
|
||
|| !SYMBOLIC_BIND (info, h)
|
||
|| !h->def_regular))
|
||
{
|
||
outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
|
||
outrel.r_addend = rel->r_addend;
|
||
}
|
||
else
|
||
{
|
||
/* This symbol is local, or marked to become local. */
|
||
outrel.r_addend = relocation + rel->r_addend;
|
||
if (r_type == R_390_64)
|
||
{
|
||
relocate = TRUE;
|
||
outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
|
||
}
|
||
else
|
||
{
|
||
long sindx;
|
||
|
||
if (bfd_is_abs_section (sec))
|
||
sindx = 0;
|
||
else if (sec == NULL || sec->owner == NULL)
|
||
{
|
||
bfd_set_error(bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
else
|
||
{
|
||
asection *osec;
|
||
|
||
osec = sec->output_section;
|
||
sindx = elf_section_data (osec)->dynindx;
|
||
|
||
if (sindx == 0)
|
||
{
|
||
osec = htab->elf.text_index_section;
|
||
sindx = elf_section_data (osec)->dynindx;
|
||
}
|
||
BFD_ASSERT (sindx != 0);
|
||
|
||
/* We are turning this relocation into one
|
||
against a section symbol, so subtract out
|
||
the output section's address but not the
|
||
offset of the input section in the output
|
||
section. */
|
||
outrel.r_addend -= osec->vma;
|
||
}
|
||
outrel.r_info = ELF64_R_INFO (sindx, r_type);
|
||
}
|
||
}
|
||
|
||
sreloc = elf_section_data (input_section)->sreloc;
|
||
if (sreloc == NULL)
|
||
abort ();
|
||
|
||
loc = sreloc->contents;
|
||
loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
|
||
/* If this reloc is against an external symbol, we do
|
||
not want to fiddle with the addend. Otherwise, we
|
||
need to include the symbol value so that it becomes
|
||
an addend for the dynamic reloc. */
|
||
if (! relocate)
|
||
continue;
|
||
}
|
||
|
||
break;
|
||
|
||
/* Relocations for tls literal pool entries. */
|
||
case R_390_TLS_IE64:
|
||
if (bfd_link_pic (info))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
asection *sreloc;
|
||
bfd_byte *loc;
|
||
|
||
outrel.r_offset = rel->r_offset
|
||
+ input_section->output_section->vma
|
||
+ input_section->output_offset;
|
||
outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
|
||
sreloc = elf_section_data (input_section)->sreloc;
|
||
if (sreloc == NULL)
|
||
abort ();
|
||
loc = sreloc->contents;
|
||
loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
|
||
}
|
||
/* Fall through. */
|
||
|
||
case R_390_TLS_GD64:
|
||
case R_390_TLS_GOTIE64:
|
||
r_type = elf_s390_tls_transition (info, r_type, h == NULL);
|
||
tls_type = GOT_UNKNOWN;
|
||
if (h == NULL && local_got_offsets)
|
||
tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
|
||
else if (h != NULL)
|
||
{
|
||
tls_type = elf_s390_hash_entry(h)->tls_type;
|
||
if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
|
||
r_type = R_390_TLS_LE64;
|
||
}
|
||
if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
|
||
r_type = R_390_TLS_IE64;
|
||
|
||
if (r_type == R_390_TLS_LE64)
|
||
{
|
||
/* This relocation gets optimized away by the local exec
|
||
access optimization. */
|
||
BFD_ASSERT (! unresolved_reloc);
|
||
bfd_put_64 (output_bfd, -tpoff (info, relocation),
|
||
contents + rel->r_offset);
|
||
continue;
|
||
}
|
||
|
||
if (htab->elf.sgot == NULL)
|
||
abort ();
|
||
|
||
if (h != NULL)
|
||
off = h->got.offset;
|
||
else
|
||
{
|
||
if (local_got_offsets == NULL)
|
||
abort ();
|
||
|
||
off = local_got_offsets[r_symndx];
|
||
}
|
||
|
||
emit_tls_relocs:
|
||
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
int dr_type, indx;
|
||
|
||
if (htab->elf.srelgot == NULL)
|
||
abort ();
|
||
|
||
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off);
|
||
|
||
indx = h && h->dynindx != -1 ? h->dynindx : 0;
|
||
if (r_type == R_390_TLS_GD64)
|
||
dr_type = R_390_TLS_DTPMOD;
|
||
else
|
||
dr_type = R_390_TLS_TPOFF;
|
||
if (dr_type == R_390_TLS_TPOFF && indx == 0)
|
||
outrel.r_addend = relocation - dtpoff_base (info);
|
||
else
|
||
outrel.r_addend = 0;
|
||
outrel.r_info = ELF64_R_INFO (indx, dr_type);
|
||
loc = htab->elf.srelgot->contents;
|
||
loc += htab->elf.srelgot->reloc_count++
|
||
* sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
|
||
if (r_type == R_390_TLS_GD64)
|
||
{
|
||
if (indx == 0)
|
||
{
|
||
BFD_ASSERT (! unresolved_reloc);
|
||
bfd_put_64 (output_bfd,
|
||
relocation - dtpoff_base (info),
|
||
htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
|
||
}
|
||
else
|
||
{
|
||
outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
|
||
outrel.r_offset += GOT_ENTRY_SIZE;
|
||
outrel.r_addend = 0;
|
||
htab->elf.srelgot->reloc_count++;
|
||
loc += sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
}
|
||
|
||
if (h != NULL)
|
||
h->got.offset |= 1;
|
||
else
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
|
||
if (off >= (bfd_vma) -2)
|
||
abort ();
|
||
if (r_type == ELF64_R_TYPE (rel->r_info))
|
||
{
|
||
relocation = htab->elf.sgot->output_offset + off;
|
||
if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
|
||
relocation += htab->elf.sgot->output_section->vma;
|
||
unresolved_reloc = FALSE;
|
||
}
|
||
else
|
||
{
|
||
bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
|
||
contents + rel->r_offset);
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case R_390_TLS_GOTIE12:
|
||
case R_390_TLS_GOTIE20:
|
||
case R_390_TLS_IEENT:
|
||
if (h == NULL)
|
||
{
|
||
if (local_got_offsets == NULL)
|
||
abort();
|
||
off = local_got_offsets[r_symndx];
|
||
if (bfd_link_pic (info))
|
||
goto emit_tls_relocs;
|
||
}
|
||
else
|
||
{
|
||
off = h->got.offset;
|
||
tls_type = elf_s390_hash_entry(h)->tls_type;
|
||
if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
|
||
goto emit_tls_relocs;
|
||
}
|
||
|
||
if (htab->elf.sgot == NULL)
|
||
abort ();
|
||
|
||
BFD_ASSERT (! unresolved_reloc);
|
||
bfd_put_64 (output_bfd, -tpoff (info, relocation),
|
||
htab->elf.sgot->contents + off);
|
||
relocation = htab->elf.sgot->output_offset + off;
|
||
if (r_type == R_390_TLS_IEENT)
|
||
relocation += htab->elf.sgot->output_section->vma;
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
|
||
case R_390_TLS_LDM64:
|
||
if (! bfd_link_pic (info))
|
||
/* The literal pool entry this relocation refers to gets ignored
|
||
by the optimized code of the local exec model. Do nothing
|
||
and the value will turn out zero. */
|
||
continue;
|
||
|
||
if (htab->elf.sgot == NULL)
|
||
abort ();
|
||
|
||
off = htab->tls_ldm_got.offset;
|
||
if (off & 1)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
|
||
if (htab->elf.srelgot == NULL)
|
||
abort ();
|
||
|
||
outrel.r_offset = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset + off);
|
||
|
||
bfd_put_64 (output_bfd, 0,
|
||
htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
|
||
outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
|
||
outrel.r_addend = 0;
|
||
loc = htab->elf.srelgot->contents;
|
||
loc += htab->elf.srelgot->reloc_count++
|
||
* sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
htab->tls_ldm_got.offset |= 1;
|
||
}
|
||
relocation = htab->elf.sgot->output_offset + off;
|
||
unresolved_reloc = FALSE;
|
||
break;
|
||
|
||
case R_390_TLS_LE64:
|
||
if (bfd_link_dll (info))
|
||
{
|
||
/* Linking a shared library with non-fpic code requires
|
||
a R_390_TLS_TPOFF relocation. */
|
||
Elf_Internal_Rela outrel;
|
||
asection *sreloc;
|
||
bfd_byte *loc;
|
||
int indx;
|
||
|
||
outrel.r_offset = rel->r_offset
|
||
+ input_section->output_section->vma
|
||
+ input_section->output_offset;
|
||
if (h != NULL && h->dynindx != -1)
|
||
indx = h->dynindx;
|
||
else
|
||
indx = 0;
|
||
outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
|
||
if (indx == 0)
|
||
outrel.r_addend = relocation - dtpoff_base (info);
|
||
else
|
||
outrel.r_addend = 0;
|
||
sreloc = elf_section_data (input_section)->sreloc;
|
||
if (sreloc == NULL)
|
||
abort ();
|
||
loc = sreloc->contents;
|
||
loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT (! unresolved_reloc);
|
||
bfd_put_64 (output_bfd, -tpoff (info, relocation),
|
||
contents + rel->r_offset);
|
||
}
|
||
continue;
|
||
|
||
case R_390_TLS_LDO64:
|
||
if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
|
||
relocation -= dtpoff_base (info);
|
||
else
|
||
/* When converting LDO to LE, we must negate. */
|
||
relocation = -tpoff (info, relocation);
|
||
break;
|
||
|
||
/* Relocations for tls instructions. */
|
||
case R_390_TLS_LOAD:
|
||
case R_390_TLS_GDCALL:
|
||
case R_390_TLS_LDCALL:
|
||
tls_type = GOT_UNKNOWN;
|
||
if (h == NULL && local_got_offsets)
|
||
tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
|
||
else if (h != NULL)
|
||
tls_type = elf_s390_hash_entry(h)->tls_type;
|
||
|
||
if (tls_type == GOT_TLS_GD)
|
||
continue;
|
||
|
||
if (r_type == R_390_TLS_LOAD)
|
||
{
|
||
if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
|
||
{
|
||
/* IE->LE transition. Four valid cases:
|
||
lg %rx,(0,%ry) -> sllg %rx,%ry,0
|
||
lg %rx,(%ry,0) -> sllg %rx,%ry,0
|
||
lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
|
||
lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
|
||
unsigned int insn0, insn1, ry;
|
||
|
||
insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
|
||
if (insn1 != 0x0004)
|
||
{
|
||
invalid_tls_insn (input_bfd, input_section, rel);
|
||
return FALSE;
|
||
}
|
||
if ((insn0 & 0xff00f000) == 0xe3000000)
|
||
/* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
|
||
ry = (insn0 & 0x000f0000);
|
||
else if ((insn0 & 0xff0f0000) == 0xe3000000)
|
||
/* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
|
||
ry = (insn0 & 0x0000f000) << 4;
|
||
else if ((insn0 & 0xff00f000) == 0xe300c000)
|
||
/* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
|
||
ry = (insn0 & 0x000f0000);
|
||
else if ((insn0 & 0xff0f0000) == 0xe30c0000)
|
||
/* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
|
||
ry = (insn0 & 0x0000f000) << 4;
|
||
else
|
||
{
|
||
invalid_tls_insn (input_bfd, input_section, rel);
|
||
return FALSE;
|
||
}
|
||
insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
|
||
insn1 = 0x000d;
|
||
bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
|
||
bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
|
||
}
|
||
}
|
||
else if (r_type == R_390_TLS_GDCALL)
|
||
{
|
||
unsigned int insn0, insn1;
|
||
|
||
insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
|
||
if ((insn0 & 0xffff0000) != 0xc0e50000)
|
||
{
|
||
invalid_tls_insn (input_bfd, input_section, rel);
|
||
return FALSE;
|
||
}
|
||
if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
|
||
{
|
||
/* GD->LE transition.
|
||
brasl %r14,__tls_get_addr@plt -> brcl 0,. */
|
||
insn0 = 0xc0040000;
|
||
insn1 = 0x0000;
|
||
}
|
||
else
|
||
{
|
||
/* GD->IE transition.
|
||
brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
|
||
insn0 = 0xe322c000;
|
||
insn1 = 0x0004;
|
||
}
|
||
bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
|
||
bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
|
||
}
|
||
else if (r_type == R_390_TLS_LDCALL)
|
||
{
|
||
if (!bfd_link_pic (info))
|
||
{
|
||
unsigned int insn0, insn1;
|
||
|
||
insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
|
||
if ((insn0 & 0xffff0000) != 0xc0e50000)
|
||
{
|
||
invalid_tls_insn (input_bfd, input_section, rel);
|
||
return FALSE;
|
||
}
|
||
/* LD->LE transition.
|
||
brasl %r14,__tls_get_addr@plt -> brcl 0,. */
|
||
insn0 = 0xc0040000;
|
||
insn1 = 0x0000;
|
||
bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
|
||
bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
|
||
}
|
||
}
|
||
continue;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* Dynamic relocs are not propagated for SEC_DEBUGGING sections
|
||
because such sections are not SEC_ALLOC and thus ld.so will
|
||
not process them. */
|
||
if (unresolved_reloc
|
||
&& !((input_section->flags & SEC_DEBUGGING) != 0
|
||
&& h->def_dynamic)
|
||
&& _bfd_elf_section_offset (output_bfd, info, input_section,
|
||
rel->r_offset) != (bfd_vma) -1)
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB(%pA+%#" PRIx64 "): "
|
||
"unresolvable %s relocation against symbol `%s'"),
|
||
input_bfd,
|
||
input_section,
|
||
(uint64_t) rel->r_offset,
|
||
howto->name,
|
||
h->root.root.string);
|
||
|
||
do_relocation:
|
||
|
||
/* When applying a 24 bit reloc we need to start one byte
|
||
earlier. Otherwise the 32 bit get/put bfd operations might
|
||
access a byte after the actual section. */
|
||
if (r_type == R_390_PC24DBL
|
||
|| r_type == R_390_PLT24DBL)
|
||
rel->r_offset--;
|
||
|
||
if (r_type == R_390_20
|
||
|| r_type == R_390_GOT20
|
||
|| r_type == R_390_GOTPLT20
|
||
|| r_type == R_390_TLS_GOTIE20)
|
||
{
|
||
relocation += rel->r_addend;
|
||
relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, 0);
|
||
}
|
||
else
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = bfd_elf_string_from_elf_section (input_bfd,
|
||
symtab_hdr->sh_link,
|
||
sym->st_name);
|
||
if (name == NULL)
|
||
return FALSE;
|
||
if (*name == '\0')
|
||
name = bfd_section_name (sec);
|
||
}
|
||
|
||
if (r == bfd_reloc_overflow)
|
||
(*info->callbacks->reloc_overflow)
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
||
else
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
|
||
input_bfd, input_section,
|
||
(uint64_t) rel->r_offset, name, (int) r);
|
||
return FALSE;
|
||
}
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Generate the PLT slots together with the dynamic relocations needed
|
||
for IFUNC symbols. */
|
||
|
||
static void
|
||
elf_s390_finish_ifunc_symbol (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h,
|
||
struct elf_s390_link_hash_table *htab,
|
||
bfd_vma plt_offset,
|
||
bfd_vma resolver_address)
|
||
{
|
||
bfd_vma plt_index;
|
||
bfd_vma got_offset;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
asection *plt, *gotplt, *relplt;
|
||
|
||
if (htab->elf.iplt == NULL
|
||
|| htab->elf.igotplt == NULL
|
||
|| htab->elf.irelplt == NULL)
|
||
abort ();
|
||
|
||
/* Index of the PLT slot within iplt section. */
|
||
plt_index = plt_offset / PLT_ENTRY_SIZE;
|
||
plt = htab->elf.iplt;
|
||
/* Offset into the igot.plt section. */
|
||
got_offset = plt_index * GOT_ENTRY_SIZE;
|
||
gotplt = htab->elf.igotplt;
|
||
relplt = htab->elf.irelplt;
|
||
|
||
/* Fill in the blueprint of a PLT. */
|
||
memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
|
||
PLT_ENTRY_SIZE);
|
||
|
||
/* Fixup the relative address to the GOT entry */
|
||
bfd_put_32 (output_bfd,
|
||
(gotplt->output_section->vma +
|
||
gotplt->output_offset + got_offset
|
||
- (plt->output_section->vma +
|
||
plt->output_offset +
|
||
plt_offset))/2,
|
||
plt->contents + plt_offset + 2);
|
||
/* Fixup the relative branch to PLT 0 */
|
||
bfd_put_32 (output_bfd, - (plt->output_offset +
|
||
(PLT_ENTRY_SIZE * plt_index) + 22)/2,
|
||
plt->contents + plt_offset + 24);
|
||
/* Fixup offset into .rela.plt section. */
|
||
bfd_put_32 (output_bfd, relplt->output_offset +
|
||
plt_index * sizeof (Elf64_External_Rela),
|
||
plt->contents + plt_offset + 28);
|
||
|
||
/* Fill in the entry in the global offset table.
|
||
Points to instruction after GOT offset. */
|
||
bfd_put_64 (output_bfd,
|
||
(plt->output_section->vma
|
||
+ plt->output_offset
|
||
+ plt_offset
|
||
+ 14),
|
||
gotplt->contents + got_offset);
|
||
|
||
/* Fill in the entry in the .rela.plt section. */
|
||
rela.r_offset = (gotplt->output_section->vma
|
||
+ gotplt->output_offset
|
||
+ got_offset);
|
||
|
||
if (!h
|
||
|| h->dynindx == -1
|
||
|| ((bfd_link_executable (info)
|
||
|| ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
||
&& h->def_regular))
|
||
{
|
||
/* The symbol can be locally resolved. */
|
||
rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
|
||
rela.r_addend = resolver_address;
|
||
}
|
||
else
|
||
{
|
||
rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
|
||
rela.r_addend = 0;
|
||
}
|
||
|
||
loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_finish_dynamic_symbol (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym *sym)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
|
||
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
bfd_vma plt_index;
|
||
bfd_vma gotplt_offset;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbol has an entry in the procedure linkage table. Set
|
||
it up. */
|
||
if (s390_is_ifunc_symbol_p (h) && h->def_regular)
|
||
{
|
||
elf_s390_finish_ifunc_symbol (output_bfd, info, h,
|
||
htab, h->plt.offset,
|
||
eh->ifunc_resolver_address +
|
||
eh->ifunc_resolver_section->output_offset +
|
||
eh->ifunc_resolver_section->output_section->vma);
|
||
|
||
/* Do not return yet. Handling of explicit GOT slots of
|
||
IFUNC symbols is below. */
|
||
}
|
||
else
|
||
{
|
||
if (h->dynindx == -1
|
||
|| htab->elf.splt == NULL
|
||
|| htab->elf.sgotplt == NULL
|
||
|| htab->elf.srelplt == NULL)
|
||
abort ();
|
||
|
||
/* Calc. index no.
|
||
Current offset - size first entry / entry size. */
|
||
plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
|
||
|
||
/* The slots in the .got.plt correspond to the PLT slots in
|
||
the same order. */
|
||
gotplt_offset = plt_index * GOT_ENTRY_SIZE;
|
||
|
||
/* If .got.plt comes first it needs to contain the 3 header
|
||
entries. */
|
||
if (!s390_gotplt_after_got_p (info))
|
||
gotplt_offset += 3 * GOT_ENTRY_SIZE;
|
||
|
||
/* Fill in the blueprint of a PLT. */
|
||
memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
|
||
PLT_ENTRY_SIZE);
|
||
|
||
/* The first instruction in the PLT entry is a LARL loading
|
||
the address of the GOT slot. We write the 4 byte
|
||
immediate operand of the LARL instruction here. */
|
||
bfd_put_32 (output_bfd,
|
||
(htab->elf.sgotplt->output_section->vma +
|
||
htab->elf.sgotplt->output_offset + gotplt_offset
|
||
- (htab->elf.splt->output_section->vma +
|
||
htab->elf.splt->output_offset +
|
||
h->plt.offset))/2,
|
||
htab->elf.splt->contents + h->plt.offset + 2);
|
||
/* Fixup the relative branch to PLT 0 */
|
||
bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
|
||
(PLT_ENTRY_SIZE * plt_index) + 22)/2,
|
||
htab->elf.splt->contents + h->plt.offset + 24);
|
||
/* Fixup offset into .rela.plt section. */
|
||
bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
|
||
htab->elf.splt->contents + h->plt.offset + 28);
|
||
|
||
/* Fill in the entry in the global offset table.
|
||
Points to instruction after GOT offset. */
|
||
bfd_put_64 (output_bfd,
|
||
(htab->elf.splt->output_section->vma
|
||
+ htab->elf.splt->output_offset
|
||
+ h->plt.offset
|
||
+ 14),
|
||
htab->elf.sgotplt->contents + gotplt_offset);
|
||
|
||
/* Fill in the entry in the .rela.plt section. */
|
||
rela.r_offset = (htab->elf.sgotplt->output_section->vma
|
||
+ htab->elf.sgotplt->output_offset
|
||
+ gotplt_offset);
|
||
rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
|
||
rela.r_addend = 0;
|
||
loc = htab->elf.srelplt->contents + plt_index *
|
||
sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
||
|
||
if (!h->def_regular)
|
||
{
|
||
/* Mark the symbol as undefined, rather than as defined in
|
||
the .plt section. Leave the value alone. This is a clue
|
||
for the dynamic linker, to make function pointer
|
||
comparisons work between an application and shared
|
||
library. */
|
||
sym->st_shndx = SHN_UNDEF;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (h->got.offset != (bfd_vma) -1
|
||
&& elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
|
||
&& elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
|
||
&& elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
|
||
{
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbol has an entry in the global offset table. Set it
|
||
up. */
|
||
if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
|
||
abort ();
|
||
|
||
rela.r_offset = (htab->elf.sgot->output_section->vma
|
||
+ htab->elf.sgot->output_offset
|
||
+ (h->got.offset &~ (bfd_vma) 1));
|
||
|
||
if (h->def_regular && s390_is_ifunc_symbol_p (h))
|
||
{
|
||
if (bfd_link_pic (info))
|
||
{
|
||
/* An explicit GOT slot usage needs GLOB_DAT. If the
|
||
symbol references local the implicit got.iplt slot
|
||
will be used and the IRELATIVE reloc has been created
|
||
above. */
|
||
goto do_glob_dat;
|
||
}
|
||
else
|
||
{
|
||
/* For non-shared objects explicit GOT slots must be
|
||
filled with the PLT slot address for pointer
|
||
equality reasons. */
|
||
bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
|
||
+ htab->elf.iplt->output_offset
|
||
+ h->plt.offset),
|
||
htab->elf.sgot->contents + h->got.offset);
|
||
return TRUE;
|
||
}
|
||
}
|
||
else if (bfd_link_pic (info)
|
||
&& SYMBOL_REFERENCES_LOCAL (info, h))
|
||
{
|
||
if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
|
||
return TRUE;
|
||
|
||
/* If this is a static link, or it is a -Bsymbolic link and
|
||
the symbol is defined locally or was forced to be local
|
||
because of a version file, we just want to emit a
|
||
RELATIVE reloc. The entry in the global offset table
|
||
will already have been initialized in the
|
||
relocate_section function. */
|
||
if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
|
||
return FALSE;
|
||
BFD_ASSERT((h->got.offset & 1) != 0);
|
||
rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
|
||
rela.r_addend = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT((h->got.offset & 1) == 0);
|
||
do_glob_dat:
|
||
bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
|
||
rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
|
||
rela.r_addend = 0;
|
||
}
|
||
|
||
loc = htab->elf.srelgot->contents;
|
||
loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
if (h->needs_copy)
|
||
{
|
||
Elf_Internal_Rela rela;
|
||
asection *s;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbols needs a copy reloc. Set it up. */
|
||
|
||
if (h->dynindx == -1
|
||
|| (h->root.type != bfd_link_hash_defined
|
||
&& h->root.type != bfd_link_hash_defweak)
|
||
|| htab->elf.srelbss == NULL)
|
||
abort ();
|
||
|
||
rela.r_offset = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
|
||
rela.r_addend = 0;
|
||
if (h->root.u.def.section == htab->elf.sdynrelro)
|
||
s = htab->elf.sreldynrelro;
|
||
else
|
||
s = htab->elf.srelbss;
|
||
loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
/* Mark some specially defined symbols as absolute. */
|
||
if (h == htab->elf.hdynamic
|
||
|| h == htab->elf.hgot
|
||
|| h == htab->elf.hplt)
|
||
sym->st_shndx = SHN_ABS;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Used to decide how to sort relocs in an optimal manner for the
|
||
dynamic linker, before writing them out. */
|
||
|
||
static enum elf_reloc_type_class
|
||
elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
const asection *rel_sec ATTRIBUTE_UNUSED,
|
||
const Elf_Internal_Rela *rela)
|
||
{
|
||
bfd *abfd = info->output_bfd;
|
||
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
|
||
unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
|
||
Elf_Internal_Sym sym;
|
||
|
||
if (htab->elf.dynsym == NULL
|
||
|| !bed->s->swap_symbol_in (abfd,
|
||
(htab->elf.dynsym->contents
|
||
+ r_symndx * bed->s->sizeof_sym),
|
||
0, &sym))
|
||
abort ();
|
||
|
||
/* Check relocation against STT_GNU_IFUNC symbol. */
|
||
if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
|
||
return reloc_class_ifunc;
|
||
|
||
switch ((int) ELF64_R_TYPE (rela->r_info))
|
||
{
|
||
case R_390_RELATIVE:
|
||
return reloc_class_relative;
|
||
case R_390_JMP_SLOT:
|
||
return reloc_class_plt;
|
||
case R_390_COPY:
|
||
return reloc_class_copy;
|
||
default:
|
||
return reloc_class_normal;
|
||
}
|
||
}
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_finish_dynamic_sections (bfd *output_bfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
bfd *dynobj;
|
||
asection *sdyn;
|
||
bfd *ibfd;
|
||
unsigned int i;
|
||
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
dynobj = htab->elf.dynobj;
|
||
sdyn = bfd_get_linker_section (dynobj, ".dynamic");
|
||
|
||
if (htab->elf.dynamic_sections_created)
|
||
{
|
||
Elf64_External_Dyn *dyncon, *dynconend;
|
||
|
||
if (sdyn == NULL || htab->elf.sgot == NULL)
|
||
abort ();
|
||
|
||
dyncon = (Elf64_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
asection *s;
|
||
|
||
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
default:
|
||
continue;
|
||
|
||
case DT_PLTGOT:
|
||
/* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
|
||
dyn.d_un.d_ptr = s390_got_pointer (info);
|
||
break;
|
||
|
||
case DT_JMPREL:
|
||
s = htab->elf.srelplt;
|
||
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
|
||
break;
|
||
|
||
case DT_PLTRELSZ:
|
||
dyn.d_un.d_val = htab->elf.srelplt->size;
|
||
if (htab->elf.irelplt)
|
||
dyn.d_un.d_val += htab->elf.irelplt->size;
|
||
break;
|
||
|
||
case DT_RELASZ:
|
||
/* The procedure linkage table relocs (DT_JMPREL) should
|
||
not be included in the overall relocs (DT_RELA).
|
||
Therefore, we override the DT_RELASZ entry here to
|
||
make it not include the JMPREL relocs. Since the
|
||
linker script arranges for .rela.plt to follow all
|
||
other relocation sections, we don't have to worry
|
||
about changing the DT_RELA entry. */
|
||
dyn.d_un.d_val -= htab->elf.srelplt->size;
|
||
if (htab->elf.irelplt)
|
||
dyn.d_un.d_val -= htab->elf.irelplt->size;
|
||
break;
|
||
}
|
||
|
||
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
}
|
||
|
||
/* Fill in the special first entry in the procedure linkage table. */
|
||
if (htab->elf.splt && htab->elf.splt->size > 0)
|
||
{
|
||
/* fill in blueprint for plt 0 entry */
|
||
memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
|
||
PLT_FIRST_ENTRY_SIZE);
|
||
/* The second instruction in the first PLT entry is a LARL
|
||
loading the GOT pointer. Fill in the LARL immediate
|
||
address. */
|
||
bfd_put_32 (output_bfd,
|
||
(s390_got_pointer (info)
|
||
- htab->elf.splt->output_section->vma
|
||
- htab->elf.splt->output_offset - 6)/2,
|
||
htab->elf.splt->contents + 8);
|
||
}
|
||
if (elf_section_data (htab->elf.splt->output_section) != NULL)
|
||
elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
|
||
= PLT_ENTRY_SIZE;
|
||
}
|
||
|
||
if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
|
||
{
|
||
/* Fill in the first three entries in the global offset table. */
|
||
if (htab->elf.hgot->root.u.def.section->size > 0)
|
||
{
|
||
bfd_put_64 (output_bfd,
|
||
(sdyn == NULL ? (bfd_vma) 0
|
||
: sdyn->output_section->vma + sdyn->output_offset),
|
||
htab->elf.hgot->root.u.def.section->contents);
|
||
/* One entry for shared object struct ptr. */
|
||
bfd_put_64 (output_bfd, (bfd_vma) 0,
|
||
htab->elf.hgot->root.u.def.section->contents + 8);
|
||
/* One entry for _dl_runtime_resolve. */
|
||
bfd_put_64 (output_bfd, (bfd_vma) 0,
|
||
htab->elf.hgot->root.u.def.section->contents + 16);
|
||
}
|
||
if (htab->elf.sgot != NULL && htab->elf.sgot->size > 0)
|
||
elf_section_data (htab->elf.sgot->output_section)
|
||
->this_hdr.sh_entsize = 8;
|
||
}
|
||
|
||
/* Finish dynamic symbol for local IFUNC symbols. */
|
||
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
|
||
{
|
||
struct plt_entry *local_plt;
|
||
Elf_Internal_Sym *isym;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
|
||
symtab_hdr = &elf_symtab_hdr (ibfd);
|
||
|
||
if (!is_s390_elf (ibfd))
|
||
continue;
|
||
|
||
local_plt = elf_s390_local_plt (ibfd);
|
||
if (local_plt != NULL)
|
||
for (i = 0; i < symtab_hdr->sh_info; i++)
|
||
{
|
||
if (local_plt[i].plt.offset != (bfd_vma) -1)
|
||
{
|
||
asection *sec = local_plt[i].sec;
|
||
isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, ibfd, i);
|
||
if (isym == NULL)
|
||
return FALSE;
|
||
|
||
if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
|
||
elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
|
||
local_plt[i].plt.offset,
|
||
isym->st_value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
|
||
}
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Support for core dump NOTE sections. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
|
||
{
|
||
int offset;
|
||
size_t size;
|
||
|
||
switch (note->descsz)
|
||
{
|
||
default:
|
||
return FALSE;
|
||
|
||
case 336: /* sizeof(struct elf_prstatus) on s390x */
|
||
/* pr_cursig */
|
||
elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
|
||
|
||
/* pr_pid */
|
||
elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
|
||
|
||
/* pr_reg */
|
||
offset = 112;
|
||
size = 216;
|
||
break;
|
||
}
|
||
|
||
/* Make a ".reg/999" section. */
|
||
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
|
||
size, note->descpos + offset);
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
|
||
{
|
||
switch (note->descsz)
|
||
{
|
||
default:
|
||
return FALSE;
|
||
|
||
case 136: /* sizeof(struct elf_prpsinfo) on s390x */
|
||
elf_tdata (abfd)->core->pid
|
||
= bfd_get_32 (abfd, note->descdata + 24);
|
||
elf_tdata (abfd)->core->program
|
||
= _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
|
||
elf_tdata (abfd)->core->command
|
||
= _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
|
||
}
|
||
|
||
/* Note that for some reason, a spurious space is tacked
|
||
onto the end of the args in some (at least one anyway)
|
||
implementations, so strip it off if it exists. */
|
||
|
||
{
|
||
char *command = elf_tdata (abfd)->core->command;
|
||
int n = strlen (command);
|
||
|
||
if (0 < n && command[n - 1] == ' ')
|
||
command[n - 1] = '\0';
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static char *
|
||
elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
|
||
int note_type, ...)
|
||
{
|
||
va_list ap;
|
||
|
||
switch (note_type)
|
||
{
|
||
default:
|
||
return NULL;
|
||
|
||
case NT_PRPSINFO:
|
||
{
|
||
char data[136] ATTRIBUTE_NONSTRING = { 0 };
|
||
const char *fname, *psargs;
|
||
|
||
va_start (ap, note_type);
|
||
fname = va_arg (ap, const char *);
|
||
psargs = va_arg (ap, const char *);
|
||
va_end (ap);
|
||
|
||
strncpy (data + 40, fname, 16);
|
||
#if GCC_VERSION == 8000 || GCC_VERSION == 8001
|
||
DIAGNOSTIC_PUSH;
|
||
/* GCC 8.0 and 8.1 warn about 80 equals destination size with
|
||
-Wstringop-truncation:
|
||
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
|
||
*/
|
||
DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
|
||
#endif
|
||
strncpy (data + 56, psargs, 80);
|
||
#if GCC_VERSION == 8000 || GCC_VERSION == 8001
|
||
DIAGNOSTIC_POP;
|
||
#endif
|
||
return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
|
||
&data, sizeof (data));
|
||
}
|
||
|
||
case NT_PRSTATUS:
|
||
{
|
||
char data[336] = { 0 };
|
||
long pid;
|
||
int cursig;
|
||
const void *gregs;
|
||
|
||
va_start (ap, note_type);
|
||
pid = va_arg (ap, long);
|
||
cursig = va_arg (ap, int);
|
||
gregs = va_arg (ap, const void *);
|
||
va_end (ap);
|
||
|
||
bfd_put_16 (abfd, cursig, data + 12);
|
||
bfd_put_32 (abfd, pid, data + 32);
|
||
memcpy (data + 112, gregs, 216);
|
||
return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
|
||
&data, sizeof (data));
|
||
}
|
||
}
|
||
/* NOTREACHED */
|
||
}
|
||
|
||
/* Return address for Ith PLT stub in section PLT, for relocation REL
|
||
or (bfd_vma) -1 if it should not be included. */
|
||
|
||
static bfd_vma
|
||
elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
|
||
const arelent *rel ATTRIBUTE_UNUSED)
|
||
{
|
||
return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
|
||
static bfd_boolean
|
||
elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
|
||
{
|
||
if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
|
||
return TRUE;
|
||
|
||
return elf_s390_merge_obj_attributes (ibfd, info);
|
||
}
|
||
|
||
/* We may add a PT_S390_PGSTE program header. */
|
||
|
||
static int
|
||
elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
|
||
if (info)
|
||
{
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab)
|
||
return htab->params->pgste;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Add the PT_S390_PGSTE program header. */
|
||
|
||
static bfd_boolean
|
||
elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
struct elf_segment_map *m, *pm = NULL;
|
||
|
||
if (!abfd || !info)
|
||
return TRUE;
|
||
|
||
htab = elf_s390_hash_table (info);
|
||
if (!htab || !htab->params->pgste)
|
||
return TRUE;
|
||
|
||
/* If there is already a PT_S390_PGSTE header, avoid adding
|
||
another. */
|
||
m = elf_seg_map (abfd);
|
||
while (m && m->p_type != PT_S390_PGSTE)
|
||
{
|
||
pm = m;
|
||
m = m->next;
|
||
}
|
||
|
||
if (m)
|
||
return TRUE;
|
||
|
||
m = (struct elf_segment_map *)
|
||
bfd_zalloc (abfd, sizeof (struct elf_segment_map));
|
||
if (m == NULL)
|
||
return FALSE;
|
||
m->p_type = PT_S390_PGSTE;
|
||
m->count = 0;
|
||
m->next = NULL;
|
||
if (pm)
|
||
pm->next = m;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
bfd_boolean
|
||
bfd_elf_s390_set_options (struct bfd_link_info *info,
|
||
struct s390_elf_params *params)
|
||
{
|
||
struct elf_s390_link_hash_table *htab;
|
||
|
||
if (info)
|
||
{
|
||
htab = elf_s390_hash_table (info);
|
||
if (htab)
|
||
htab->params = params;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/* Why was the hash table entry size definition changed from
|
||
ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
|
||
this is the only reason for the s390_elf64_size_info structure. */
|
||
|
||
const struct elf_size_info s390_elf64_size_info =
|
||
{
|
||
sizeof (Elf64_External_Ehdr),
|
||
sizeof (Elf64_External_Phdr),
|
||
sizeof (Elf64_External_Shdr),
|
||
sizeof (Elf64_External_Rel),
|
||
sizeof (Elf64_External_Rela),
|
||
sizeof (Elf64_External_Sym),
|
||
sizeof (Elf64_External_Dyn),
|
||
sizeof (Elf_External_Note),
|
||
8, /* hash-table entry size. */
|
||
1, /* internal relocations per external relocations. */
|
||
64, /* arch_size. */
|
||
3, /* log_file_align. */
|
||
ELFCLASS64, EV_CURRENT,
|
||
bfd_elf64_write_out_phdrs,
|
||
bfd_elf64_write_shdrs_and_ehdr,
|
||
bfd_elf64_checksum_contents,
|
||
bfd_elf64_write_relocs,
|
||
bfd_elf64_swap_symbol_in,
|
||
bfd_elf64_swap_symbol_out,
|
||
bfd_elf64_slurp_reloc_table,
|
||
bfd_elf64_slurp_symbol_table,
|
||
bfd_elf64_swap_dyn_in,
|
||
bfd_elf64_swap_dyn_out,
|
||
bfd_elf64_swap_reloc_in,
|
||
bfd_elf64_swap_reloc_out,
|
||
bfd_elf64_swap_reloca_in,
|
||
bfd_elf64_swap_reloca_out
|
||
};
|
||
|
||
#define TARGET_BIG_SYM s390_elf64_vec
|
||
#define TARGET_BIG_NAME "elf64-s390"
|
||
#define ELF_ARCH bfd_arch_s390
|
||
#define ELF_TARGET_ID S390_ELF_DATA
|
||
#define ELF_MACHINE_CODE EM_S390
|
||
#define ELF_MACHINE_ALT1 EM_S390_OLD
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define elf_backend_size_info s390_elf64_size_info
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_can_refcount 1
|
||
#define elf_backend_want_got_plt 1
|
||
#define elf_backend_plt_readonly 1
|
||
#define elf_backend_want_plt_sym 0
|
||
#define elf_backend_got_header_size 24
|
||
#define elf_backend_want_dynrelro 1
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#define elf_info_to_howto elf_s390_info_to_howto
|
||
|
||
#define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
|
||
#define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
|
||
#define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
|
||
#define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
|
||
#define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
|
||
|
||
#define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
|
||
#define elf_backend_check_relocs elf_s390_check_relocs
|
||
#define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
|
||
#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
|
||
#define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
|
||
#define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
|
||
#define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
|
||
#define elf_backend_reloc_type_class elf_s390_reloc_type_class
|
||
#define elf_backend_relocate_section elf_s390_relocate_section
|
||
#define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
|
||
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
|
||
#define elf_backend_grok_prstatus elf_s390_grok_prstatus
|
||
#define elf_backend_grok_psinfo elf_s390_grok_psinfo
|
||
#define elf_backend_write_core_note elf_s390_write_core_note
|
||
#define elf_backend_plt_sym_val elf_s390_plt_sym_val
|
||
#define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
|
||
#define elf_backend_additional_program_headers elf_s390_additional_program_headers
|
||
#define elf_backend_modify_segment_map elf_s390_modify_segment_map
|
||
|
||
#define bfd_elf64_mkobject elf_s390_mkobject
|
||
#define elf_backend_object_p elf_s390_object_p
|
||
|
||
#include "elf64-target.h"
|