diff options
Diffstat (limited to 'binutils-2.24/bfd/elf32-s390.c')
| -rw-r--r-- | binutils-2.24/bfd/elf32-s390.c | 4029 |
1 files changed, 0 insertions, 4029 deletions
diff --git a/binutils-2.24/bfd/elf32-s390.c b/binutils-2.24/bfd/elf32-s390.c deleted file mode 100644 index 6467b032..00000000 --- a/binutils-2.24/bfd/elf32-s390.c +++ /dev/null @@ -1,4029 +0,0 @@ -/* IBM S/390-specific support for 32-bit ELF - Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, - 2011, 2012 Free Software Foundation, Inc. - Contributed by Carl B. Pedersen and Martin Schwidefsky. - - This file is part of BFD, the Binary File Descriptor library. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA - 02110-1301, USA. */ - -#include "sysdep.h" -#include "bfd.h" -#include "bfdlink.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf/s390.h" - -static bfd_reloc_status_type -s390_tls_reloc (bfd *, arelent *, asymbol *, void *, - asection *, bfd *, char **); -static bfd_reloc_status_type -s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *, - asection *, bfd *, char **); - -/* The relocation "howto" table. */ - -static reloc_howto_type elf_howto_table[] = -{ - HOWTO (R_390_NONE, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */ - 0, /* bitsize */ - FALSE, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_390_NONE", /* name */ - FALSE, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - FALSE), /* pcrel_offset */ - - HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), - HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, - bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), - HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), - HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE), - HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), - HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), - HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), - HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE), - EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */ - EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */ - EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */ - EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */ - HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), - EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */ - HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, - bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), - HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), - EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */ - HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE), - HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), - HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), - EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */ - HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, - s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), - HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, - s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), - HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, - s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), - HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE), - EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */ - HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, - bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), - HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE), - EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */ - HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE), - EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */ - HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE), - EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */ - HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE), - HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE), - EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */ - HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE), - EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */ - HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE), - HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE), - HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE), - HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, - s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), - HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, - s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), - HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, - s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), - HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, - s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), - HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE), - HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE), - HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE), - HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE), - HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE), -}; - -/* GNU extension to record C++ vtable hierarchy. */ -static reloc_howto_type elf32_s390_vtinherit_howto = - HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); -static reloc_howto_type elf32_s390_vtentry_howto = - HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); - -static reloc_howto_type * -elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, - bfd_reloc_code_real_type code) -{ - switch (code) - { - case BFD_RELOC_NONE: - return &elf_howto_table[(int) R_390_NONE]; - case BFD_RELOC_8: - return &elf_howto_table[(int) R_390_8]; - case BFD_RELOC_390_12: - return &elf_howto_table[(int) R_390_12]; - case BFD_RELOC_16: - return &elf_howto_table[(int) R_390_16]; - case BFD_RELOC_32: - return &elf_howto_table[(int) R_390_32]; - case BFD_RELOC_CTOR: - return &elf_howto_table[(int) R_390_32]; - case BFD_RELOC_32_PCREL: - return &elf_howto_table[(int) R_390_PC32]; - case BFD_RELOC_390_GOT12: - return &elf_howto_table[(int) R_390_GOT12]; - case BFD_RELOC_32_GOT_PCREL: - return &elf_howto_table[(int) R_390_GOT32]; - case BFD_RELOC_390_PLT32: - return &elf_howto_table[(int) R_390_PLT32]; - case BFD_RELOC_390_COPY: - return &elf_howto_table[(int) R_390_COPY]; - case BFD_RELOC_390_GLOB_DAT: - return &elf_howto_table[(int) R_390_GLOB_DAT]; - case BFD_RELOC_390_JMP_SLOT: - return &elf_howto_table[(int) R_390_JMP_SLOT]; - case BFD_RELOC_390_RELATIVE: - return &elf_howto_table[(int) R_390_RELATIVE]; - case BFD_RELOC_32_GOTOFF: - return &elf_howto_table[(int) R_390_GOTOFF32]; - case BFD_RELOC_390_GOTPC: - return &elf_howto_table[(int) R_390_GOTPC]; - case BFD_RELOC_390_GOT16: - return &elf_howto_table[(int) R_390_GOT16]; - case BFD_RELOC_16_PCREL: - return &elf_howto_table[(int) R_390_PC16]; - case BFD_RELOC_390_PC12DBL: - return &elf_howto_table[(int) R_390_PC12DBL]; - case BFD_RELOC_390_PLT12DBL: - return &elf_howto_table[(int) R_390_PLT12DBL]; - case BFD_RELOC_390_PC16DBL: - return &elf_howto_table[(int) R_390_PC16DBL]; - case BFD_RELOC_390_PLT16DBL: - return &elf_howto_table[(int) R_390_PLT16DBL]; - case BFD_RELOC_390_PC24DBL: - return &elf_howto_table[(int) R_390_PC24DBL]; - case BFD_RELOC_390_PLT24DBL: - return &elf_howto_table[(int) R_390_PLT24DBL]; - case BFD_RELOC_390_PC32DBL: - return &elf_howto_table[(int) R_390_PC32DBL]; - case BFD_RELOC_390_PLT32DBL: - return &elf_howto_table[(int) R_390_PLT32DBL]; - case BFD_RELOC_390_GOTPCDBL: - return &elf_howto_table[(int) R_390_GOTPCDBL]; - case BFD_RELOC_390_GOTENT: - return &elf_howto_table[(int) R_390_GOTENT]; - case BFD_RELOC_16_GOTOFF: - return &elf_howto_table[(int) R_390_GOTOFF16]; - case BFD_RELOC_390_GOTPLT12: - return &elf_howto_table[(int) R_390_GOTPLT12]; - case BFD_RELOC_390_GOTPLT16: - return &elf_howto_table[(int) R_390_GOTPLT16]; - case BFD_RELOC_390_GOTPLT32: - return &elf_howto_table[(int) R_390_GOTPLT32]; - case BFD_RELOC_390_GOTPLTENT: - return &elf_howto_table[(int) R_390_GOTPLTENT]; - case BFD_RELOC_390_PLTOFF16: - return &elf_howto_table[(int) R_390_PLTOFF16]; - case BFD_RELOC_390_PLTOFF32: - return &elf_howto_table[(int) R_390_PLTOFF32]; - 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_GD32: - return &elf_howto_table[(int) R_390_TLS_GD32]; - case BFD_RELOC_390_TLS_GOTIE12: - return &elf_howto_table[(int) R_390_TLS_GOTIE12]; - case BFD_RELOC_390_TLS_GOTIE32: - return &elf_howto_table[(int) R_390_TLS_GOTIE32]; - case BFD_RELOC_390_TLS_LDM32: - return &elf_howto_table[(int) R_390_TLS_LDM32]; - case BFD_RELOC_390_TLS_IE32: - return &elf_howto_table[(int) R_390_TLS_IE32]; - case BFD_RELOC_390_TLS_IEENT: - return &elf_howto_table[(int) R_390_TLS_IEENT]; - case BFD_RELOC_390_TLS_LE32: - return &elf_howto_table[(int) R_390_TLS_LE32]; - case BFD_RELOC_390_TLS_LDO32: - return &elf_howto_table[(int) R_390_TLS_LDO32]; - 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 &elf32_s390_vtinherit_howto; - case BFD_RELOC_VTABLE_ENTRY: - return &elf32_s390_vtentry_howto; - default: - break; - } - return 0; -} - -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 (elf32_s390_vtinherit_howto.name, r_name) == 0) - return &elf32_s390_vtinherit_howto; - if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0) - return &elf32_s390_vtentry_howto; - - return NULL; -} - -/* We need to use ELF32_R_TYPE so we have our own copy of this function, - and elf32-s390.c has its own copy. */ - -static void -elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, - arelent *cache_ptr, - Elf_Internal_Rela *dst) -{ - unsigned int r_type = ELF32_R_TYPE(dst->r_info); - switch (r_type) - { - case R_390_GNU_VTINHERIT: - cache_ptr->howto = &elf32_s390_vtinherit_howto; - break; - - case R_390_GNU_VTENTRY: - cache_ptr->howto = &elf32_s390_vtentry_howto; - break; - - default: - if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0])) - { - (*_bfd_error_handler) (_("%B: invalid relocation type %d"), - abfd, (int) r_type); - r_type = R_390_NONE; - } - cache_ptr->howto = &elf_howto_table[r_type]; - } -} - -/* 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 ATTRIBUTE_UNUSED, - arelent *reloc_entry, - asymbol *symbol, - void * data ATTRIBUTE_UNUSED, - 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/ld.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 4 - -#define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela) - -/* The first three entries in a procedure linkage 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 2 GB 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 position independent PLT entries looks like this: - - r12 holds addr of the current GOT at entry to the PLT - - The GOT holds the address in the PLT to be executed. - The loader then gets: - 24(15) = Pointer to the structure describing the object. - 28(15) = Offset into rela.plt - - The loader must then find the module where the function is - and insert the address in the GOT. - - Note: 390 can only address +- 64 K relative. - We check if offset > 65536, then make a relative branch -64xxx - back to a previous defined branch - -PLT1: BASR 1,0 # 2 bytes - L 1,22(1) # 4 bytes Load offset in GOT in r 1 - L 1,(1,12) # 4 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 - L 1,14(1) # 4 bytes Load offset in symol table in r1 - BRC 15,-x # 4 bytes Jump to start of PLT - .word 0 # 2 bytes filler - .long ? # 4 bytes offset in GOT - .long ? # 4 bytes offset into rela.plt - - This was the general case. There are two additional, optimizes PLT - definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. - First the one for GOT offsets < 4096: - -PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 - BCR 15,1 # 2 bytes Jump to address - .word 0,0,0 # 6 bytes filler -RET1: BASR 1,0 # 2 bytes Return from GOT 1st time - L 1,14(1) # 4 bytes Load offset in rela.plt in r1 - BRC 15,-x # 4 bytes Jump to start of PLT - .word 0,0,0 # 6 bytes filler - .long ? # 4 bytes offset into rela.plt - - Second the one for GOT offsets < 32768: - -PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 - L 1,(1,12) # 4 bytes Load address from GOT to r1 - BCR 15,1 # 2 bytes Jump to address - .word 0 # 2 bytes filler -RET1: BASR 1,0 # 2 bytes Return from GOT 1st time - L 1,14(1) # 4 bytes Load offset in rela.plt in r1 - BRC 15,-x # 4 bytes Jump to start of PLT - .word 0,0,0 # 6 bytes filler - .long ? # 4 bytes offset into rela.plt - -Total = 32 bytes per PLT entry - - The code for static build PLT entries looks like this: - -PLT1: BASR 1,0 # 2 bytes - L 1,22(1) # 4 bytes Load address of GOT entry - L 1,0(0,1) # 4 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 - L 1,14(1) # 4 bytes Load offset in symbol table in r1 - BRC 15,-x # 4 bytes Jump to start of PLT - .word 0 # 2 bytes filler - .long ? # 4 bytes address of GOT entry - .long ? # 4 bytes offset into rela.plt */ - -static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] = - { - 0x0d, 0x10, /* basr %r1,%r0 */ - 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */ - 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */ - 0x07, 0xf1, /* br %r1 */ - 0x0d, 0x10, /* basr %r1,%r0 */ - 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ - 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ - 0x00, 0x00, /* padding */ - 0x00, 0x00, 0x00, 0x00, /* GOT offset */ - 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */ - }; - -/* Generic PLT pic entry. */ -static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] = - { - 0x0d, 0x10, /* basr %r1,%r0 */ - 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */ - 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */ - 0x07, 0xf1, /* br %r1 */ - 0x0d, 0x10, /* basr %r1,%r0 */ - 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ - 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ - 0x00, 0x00, /* padding */ - 0x00, 0x00, 0x00, 0x00, /* GOT offset */ - 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */ - }; - -/* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced - when generating the PLT slot with the GOT offset. */ -static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] = - { - 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */ - 0x07, 0xf1, /* br %r1 */ - 0x00, 0x00, 0x00, 0x00, /* padding */ - 0x00, 0x00, - 0x0d, 0x10, /* basr %r1,%r0 */ - 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ - 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00 - }; - -/* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced - when generating the PLT slot with the GOT offset. */ -static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] = - { - 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */ - 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */ - 0x07, 0xf1, /* br %r1 */ - 0x00, 0x00, - 0x0d, 0x10, /* basr %r1,%r0 */ - 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */ - 0xa7, 0xf4, 0x00, 0x00, /* j first plt */ - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00 - }; - -/* The first PLT entry pushes the offset into the rela.plt - from R1 onto the stack at 8(15) and the loader object info - at 12(15), loads the loader address in R1 and jumps to it. */ - -/* The first entry in the PLT for PIC code: - -PLT0: - ST 1,28(15) # R1 has offset into rela.plt - L 1,4(12) # Get loader ino(object struct address) - ST 1,24(15) # Store address - L 1,8(12) # Entry address of loader in R1 - BR 1 # Jump to loader - - The first entry in the PLT for static code: - -PLT0: - ST 1,28(15) # R1 has offset into rela.plt - BASR 1,0 - L 1,18(0,1) # Get address of GOT - MVC 24(4,15),4(1) # Move loader ino to stack - L 1,8(1) # Get address of loader - BR 1 # Jump to loader - .word 0 # filler - .long got # address of GOT */ - -static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] = - { - 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */ - 0x0d, 0x10, /* basr %r1,%r0 */ - 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */ - 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */ - 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */ - 0x07, 0xf1, /* br %r1 */ - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00 - }; - -static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] = - { - 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */ - 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */ - 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */ - 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */ - 0x07, 0xf1, /* br %r1 */ - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00 - }; - - -/* s390 ELF linker hash entry. */ - -struct elf_s390_link_hash_entry -{ - struct elf_link_hash_entry elf; - - /* Track dynamic relocs copied for this symbol. */ - struct elf_dyn_relocs *dyn_relocs; - - /* 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 4 - 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 elf64-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_31); -} - -/* 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 *sdynbss; - asection *srelbss; - asection *irelifunc; - - union - { - bfd_signed_vma refcount; - bfd_vma offset; - } tls_ldm_got; - - /* Small local sym cache. */ - struct sym_cache sym_cache; -}; - -/* Get the s390 ELF linker hash table from a link_info structure. */ - -#define elf_s390_hash_table(p) \ - (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ - == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL) - -#undef ELF64 -#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->dyn_relocs = NULL; - 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; - bfd_size_type 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; -} - -/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up - shortcuts to them in our hash table. */ - -static bfd_boolean -create_got_section (bfd *dynobj, struct bfd_link_info *info) -{ - struct elf_s390_link_hash_table *htab; - - if (! _bfd_elf_create_got_section (dynobj, info)) - return FALSE; - - htab = elf_s390_hash_table (info); - htab->elf.sgot = bfd_get_linker_section (dynobj, ".got"); - htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); - htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got"); - if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot) - abort (); - - return TRUE; -} - -/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and - .rela.bss sections in DYNOBJ, and set up shortcuts to them in our - hash table. */ - -static bfd_boolean -elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) -{ - struct elf_s390_link_hash_table *htab; - - htab = elf_s390_hash_table (info); - if (!htab->elf.sgot && !create_got_section (dynobj, info)) - return FALSE; - - if (!_bfd_elf_create_dynamic_sections (dynobj, info)) - return FALSE; - - htab->elf.splt = bfd_get_linker_section (dynobj, ".plt"); - htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt"); - htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); - if (!info->shared) - htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); - - if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss - || (!info->shared && !htab->srelbss)) - abort (); - - return TRUE; -} - -/* 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 (eind->dyn_relocs != NULL) - { - if (edir->dyn_relocs != NULL) - { - struct elf_dyn_relocs **pp; - struct elf_dyn_relocs *p; - - /* Add reloc counts against the indirect sym to the direct sym - list. Merge any entries against the same section. */ - for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) - { - struct elf_dyn_relocs *q; - - for (q = edir->dyn_relocs; q != NULL; q = q->next) - if (q->sec == p->sec) - { - q->pc_count += p->pc_count; - q->count += p->count; - *pp = p->next; - break; - } - if (q == NULL) - pp = &p->next; - } - *pp = edir->dyn_relocs; - } - - edir->dyn_relocs = eind->dyn_relocs; - eind->dyn_relocs = NULL; - } - - 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. */ - 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 (info->shared) - return r_type; - - switch (r_type) - { - case R_390_TLS_GD32: - case R_390_TLS_IE32: - if (is_local) - return R_390_TLS_LE32; - return R_390_TLS_IE32; - case R_390_TLS_GOTIE32: - if (is_local) - return R_390_TLS_LE32; - return R_390_TLS_GOTIE32; - case R_390_TLS_LDM32: - return R_390_TLS_LE32; - } - - 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; - Elf_Internal_Sym *isym; - - if (info->relocatable) - return TRUE; - - BFD_ASSERT (is_s390_elf (abfd)); - - htab = elf_s390_hash_table (info); - 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 long r_symndx; - struct elf_link_hash_entry *h; - - r_symndx = ELF32_R_SYM (rel->r_info); - - if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) - { - (*_bfd_error_handler) (_("%B: 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->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; - - /* PR15323, ref flags aren't set for references in the same - object. */ - h->root.non_ir_ref = 1; - } - - /* Create got section and local_got_refcounts array if they - are needed. */ - r_type = elf_s390_tls_transition (info, - ELF32_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_GOTENT: - case R_390_GOTPLT12: - case R_390_GOTPLT16: - case R_390_GOTPLT20: - case R_390_GOTPLT32: - case R_390_GOTPLTENT: - case R_390_TLS_GD32: - case R_390_TLS_GOTIE12: - case R_390_TLS_GOTIE20: - case R_390_TLS_GOTIE32: - case R_390_TLS_IEENT: - case R_390_TLS_IE32: - case R_390_TLS_LDM32: - 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_GOTPC: - case R_390_GOTPCDBL: - if (htab->elf.sgot == NULL) - { - if (htab->elf.dynobj == NULL) - htab->elf.dynobj = abfd; - if (!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_GOTOFF16: - case R_390_GOTOFF32: - 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_PLT12DBL: - case R_390_PLT16DBL: - case R_390_PLT24DBL: - case R_390_PLT32DBL: - case R_390_PLT32: - case R_390_PLTOFF16: - case R_390_PLTOFF32: - /* 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_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_LDM32: - htab->tls_ldm_got.refcount += 1; - break; - - case R_390_TLS_IE32: - case R_390_TLS_GOTIE12: - case R_390_TLS_GOTIE20: - case R_390_TLS_GOTIE32: - case R_390_TLS_IEENT: - if (info->shared) - 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_GOTENT: - case R_390_TLS_GD32: - /* 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_GD32: - tls_type = GOT_TLS_GD; - break; - case R_390_TLS_IE32: - case R_390_TLS_GOTIE32: - 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) - (_("%B: `%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_IE32) - break; - /* Fall through. */ - - case R_390_TLS_LE32: - if (!info->shared) - break; - info->flags |= DF_STATIC_TLS; - /* Fall through. */ - - case R_390_8: - case R_390_16: - case R_390_32: - case R_390_PC16: - case R_390_PC12DBL: - case R_390_PC16DBL: - case R_390_PC24DBL: - case R_390_PC32DBL: - case R_390_PC32: - if (h != NULL) - { - /* 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 (!info->shared) - { - /* 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 ((info->shared - && (sec->flags & SEC_ALLOC) != 0 - && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16 - && ELF32_R_TYPE (rel->r_info) != R_390_PC12DBL - && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL - && ELF32_R_TYPE (rel->r_info) != R_390_PC24DBL - && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL - && ELF32_R_TYPE (rel->r_info) != R_390_PC32) - || (h != NULL - && (! SYMBOLIC_BIND (info, h) - || h->root.type == bfd_link_hash_defweak - || !h->def_regular)))) - || (ELIMINATE_COPY_RELOCS - && !info->shared - && (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, 2, 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 = &((struct elf_s390_link_hash_entry *) 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->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) - { - bfd_size_type 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 (ELF32_R_TYPE (rel->r_info) == R_390_PC16 - || ELF32_R_TYPE (rel->r_info) == R_390_PC12DBL - || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL - || ELF32_R_TYPE (rel->r_info) == R_390_PC24DBL - || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL - || ELF32_R_TYPE (rel->r_info) == R_390_PC32) - 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: - BFD_ASSERT (h != NULL); - if (h != NULL - && !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 (ELF32_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); - -} - -/* Update the got entry reference counts for the section being removed. */ - -static bfd_boolean -elf_s390_gc_sweep_hook (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; - bfd_signed_vma *local_got_refcounts; - const Elf_Internal_Rela *rel, *relend; - - if (info->relocatable) - return TRUE; - - htab = elf_s390_hash_table (info); - if (htab == NULL) - return FALSE; - - elf_section_data (sec)->local_dynrel = NULL; - - symtab_hdr = &elf_symtab_hdr (abfd); - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (abfd); - - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; rel++) - { - unsigned long r_symndx; - unsigned int r_type; - struct elf_link_hash_entry *h = NULL; - - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - struct elf_s390_link_hash_entry *eh; - struct elf_dyn_relocs **pp; - struct elf_dyn_relocs *p; - - 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; - eh = (struct elf_s390_link_hash_entry *) h; - - for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) - if (p->sec == sec) - { - /* Everything must go for SEC. */ - *pp = p->next; - break; - } - } - else - { - Elf_Internal_Sym *isym; - - /* A local symbol. */ - isym = bfd_sym_from_r_symndx (&htab->sym_cache, - abfd, r_symndx); - if (isym == NULL) - return FALSE; - - if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) - { - struct plt_entry *plt = elf_s390_local_plt (abfd); - if (plt[r_symndx].plt.refcount > 0) - plt[r_symndx].plt.refcount--; - } - } - - r_type = ELF32_R_TYPE (rel->r_info); - r_type = elf_s390_tls_transition (info, r_type, h != NULL); - switch (r_type) - { - case R_390_TLS_LDM32: - if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) - elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; - break; - - case R_390_TLS_GD32: - case R_390_TLS_IE32: - case R_390_TLS_GOTIE12: - case R_390_TLS_GOTIE20: - case R_390_TLS_GOTIE32: - case R_390_TLS_IEENT: - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT20: - case R_390_GOT32: - case R_390_GOTOFF16: - case R_390_GOTOFF32: - case R_390_GOTPC: - case R_390_GOTPCDBL: - case R_390_GOTENT: - if (h != NULL) - { - if (h->got.refcount > 0) - h->got.refcount -= 1; - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; - - case R_390_8: - case R_390_12: - case R_390_16: - case R_390_20: - case R_390_32: - case R_390_PC16: - case R_390_PC12DBL: - case R_390_PC16DBL: - case R_390_PC24DBL: - case R_390_PC32DBL: - case R_390_PC32: - if (info->shared) - break; - /* Fall through. */ - - case R_390_PLT12DBL: - case R_390_PLT16DBL: - case R_390_PLT24DBL: - case R_390_PLT32DBL: - case R_390_PLT32: - case R_390_PLTOFF16: - case R_390_PLTOFF32: - if (h != NULL) - { - if (h->plt.refcount > 0) - h->plt.refcount -= 1; - } - break; - - case R_390_GOTPLT12: - case R_390_GOTPLT16: - case R_390_GOTPLT20: - case R_390_GOTPLT32: - case R_390_GOTPLTENT: - if (h != NULL) - { - if (h->plt.refcount > 0) - { - ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; - h->plt.refcount -= 1; - } - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - local_got_refcounts[r_symndx] -= 1; - } - break; - - default: - break; - } - } - - return TRUE; -} - -/* 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; - - /* STT_GNU_IFUNC symbol must go through PLT. */ - if (s390_is_ifunc_symbol_p (h)) - 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) - || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT - && h->root.type != bfd_link_hash_undefweak)) - { - /* 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->u.weakdef != NULL) - { - BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined - || h->u.weakdef->root.type == bfd_link_hash_defweak); - h->root.u.def.section = h->u.weakdef->root.u.def.section; - h->root.u.def.value = h->u.weakdef->root.u.def.value; - if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) - h->non_got_ref = h->u.weakdef->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 (info->shared) - 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 (ELIMINATE_COPY_RELOCS) - { - struct elf_s390_link_hash_entry * eh; - struct elf_dyn_relocs *p; - - eh = (struct elf_s390_link_hash_entry *) h; - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - s = p->sec->output_section; - if (s != NULL && (s->flags & SEC_READONLY) != 0) - break; - } - - /* If we didn't find any dynamic relocs in read-only sections, then - we'll be keeping the dynamic relocs and avoiding the copy reloc. */ - if (p == NULL) - { - 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); - - /* 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_ALLOC) != 0 && h->size != 0) - { - htab->srelbss->size += sizeof (Elf32_External_Rela); - h->needs_copy = 1; - } - - s = htab->sdynbss; - - return _bfd_elf_adjust_dynamic_copy (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_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h; - 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); - - /* 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, - &eh->dyn_relocs); - 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 (info->shared - || 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 (! info->shared - && !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, which - will be placed in the .got section by the linker script. */ - htab->elf.sgotplt->size += GOT_ENTRY_SIZE; - - /* We also need to make an entry in the .rela.plt section. */ - htab->elf.srelplt->size += sizeof (Elf32_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_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to - the binary, we can optimize a bit. IE32 and GOTIE32 get converted - to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT - we can save the dynamic TLS relocation. */ - if (h->got.refcount > 0 - && !info->shared - && 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_GD32 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_IE32 needs one dynamic relocation, - R_390_TLS_GD32 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 (Elf32_External_Rela); - else if (tls_type == GOT_TLS_GD) - htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela); - else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || h->root.type != bfd_link_hash_undefweak) - && (info->shared - || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) - htab->elf.srelgot->size += sizeof (Elf32_External_Rela); - } - else - h->got.offset = (bfd_vma) -1; - - if (eh->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 (info->shared) - { - if (SYMBOL_CALLS_LOCAL (info, h)) - { - struct elf_dyn_relocs **pp; - - for (pp = &eh->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 (eh->dyn_relocs != NULL - && h->root.type == bfd_link_hash_undefweak) - { - if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) - eh->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; - } - - eh->dyn_relocs = NULL; - - keep: ; - } - - /* Finally, allocate space. */ - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - asection *sreloc = elf_section_data (p->sec)->sreloc; - - sreloc->size += p->count * sizeof (Elf32_External_Rela); - } - - return TRUE; -} - -/* Find any dynamic relocs that apply to read-only sections. */ - -static bfd_boolean -readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) -{ - struct elf_s390_link_hash_entry *eh; - struct elf_dyn_relocs *p; - - eh = (struct elf_s390_link_hash_entry *) h; - for (p = eh->dyn_relocs; p != NULL; p = p->next) - { - asection *s = p->sec->output_section; - - if (s != NULL && (s->flags & SEC_READONLY) != 0) - { - struct bfd_link_info *info = (struct bfd_link_info *) inf; - - info->flags |= DF_TEXTREL; - - /* Not an error, just cut short the traversal. */ - return FALSE; - } - } - 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); - 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 (info->executable) - { - s = bfd_get_linker_section (dynobj, ".interp"); - if (s == NULL) - abort (); - s->size = sizeof ELF_DYNAMIC_INTERPRETER; - s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; - } - } - - /* 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 (Elf32_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 (info->shared) - srela->size += sizeof (Elf32_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 += RELA_ENTRY_SIZE; - } - 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_LDM32 - relocs. */ - htab->tls_ldm_got.offset = htab->elf.sgot->size; - htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; - htab->elf.srelgot->size += sizeof (Elf32_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->sdynbss - || 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_get_section_name (dynobj, s), ".rela")) - { - if (s->size != 0) - 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; - } - - if (htab->elf.dynamic_sections_created) - { - /* Add some entries to the .dynamic section. We fill in the - values later, in elf_s390_finish_dynamic_sections, but we - must add the entries now so that we get the correct size for - the .dynamic section. The DT_DEBUG entry is filled in by the - dynamic linker and used by the debugger. */ -#define add_dynamic_entry(TAG, VAL) \ - _bfd_elf_add_dynamic_entry (info, TAG, VAL) - - if (info->executable) - { - if (!add_dynamic_entry (DT_DEBUG, 0)) - return FALSE; - } - - if (htab->elf.splt->size != 0) - { - if (!add_dynamic_entry (DT_PLTGOT, 0) - || !add_dynamic_entry (DT_PLTRELSZ, 0) - || !add_dynamic_entry (DT_PLTREL, DT_RELA) - || !add_dynamic_entry (DT_JMPREL, 0)) - return FALSE; - } - - if (relocs) - { - if (!add_dynamic_entry (DT_RELA, 0) - || !add_dynamic_entry (DT_RELASZ, 0) - || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) - return FALSE; - - /* If any dynamic relocs apply to a read-only section, - then we need a DT_TEXTREL entry. */ - if ((info->flags & DF_TEXTREL) == 0) - elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); - - if ((info->flags & DF_TEXTREL) != 0) - { - if (!add_dynamic_entry (DT_TEXTREL, 0)) - return FALSE; - } - } - } -#undef add_dynamic_entry - - return TRUE; -} - -/* 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 + ELF32_R_TYPE (rel->r_info); - (*_bfd_error_handler) - (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), - input_bfd, - input_section, - (long) 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; - - BFD_ASSERT (is_s390_elf (input_bfd)); - - htab = elf_s390_hash_table (info); - 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; - asection *base_got = htab->elf.sgot; - - r_type = ELF32_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 = ELF32_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: - relocation -= htab->elf.sgot->output_section->vma; - break; - case R_390_GOTPLT12: - case R_390_GOTPLT16: - case R_390_GOTPLT20: - case R_390_GOTPLT32: - case R_390_GOTPLTENT: - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT20: - case R_390_GOT32: - case R_390_GOTENT: - { - /* Write the PLT slot address into the GOT slot. */ - bfd_put_32 (output_bfd, relocation, - htab->elf.sgot->contents + - local_got_offsets[r_symndx]); - relocation = (local_got_offsets[r_symndx] + - htab->elf.sgot->output_offset); - - if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT) - relocation += htab->elf.sgot->output_section->vma; - 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; - - RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, - r_symndx, symtab_hdr, sym_hashes, - h, sec, relocation, - unresolved_reloc, warned); - } - - if (sec != NULL && discarded_section (sec)) - RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, - rel, 1, relend, howto, 0, contents); - - if (info->relocatable) - continue; - - switch (r_type) - { - case R_390_GOTPLT12: - case R_390_GOTPLT16: - case R_390_GOTPLT20: - case R_390_GOTPLT32: - 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)) - { - plt_index = h->plt.offset / PLT_ENTRY_SIZE; - relocation = (plt_index * GOT_ENTRY_SIZE + - htab->elf.igotplt->output_offset); - if (r_type == R_390_GOTPLTENT) - relocation += htab->elf.igotplt->output_section->vma; - } - else - { - /* Calc. index no. - Current offset - size first entry / entry size. */ - plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / - PLT_ENTRY_SIZE; - - /* Offset in GOT is PLT index plus GOT headers(3) - times 4, addr & GOT addr. */ - relocation = (plt_index + 3) * GOT_ENTRY_SIZE; - if (r_type == R_390_GOTPLTENT) - relocation += htab->elf.sgot->output_section->vma; - } - unresolved_reloc = FALSE; - - } - /* Fall through. */ - - case R_390_GOT12: - case R_390_GOT16: - case R_390_GOT20: - case R_390_GOT32: - case R_390_GOTENT: - /* Relocation is to the entry for this symbol in the global - offset table. */ - if (base_got == 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. */ - base_got = htab->elf.igotplt; - off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE; - } - 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, info->shared, h) - || (info->shared - && SYMBOL_REFERENCES_LOCAL (info, h)) - || (ELF_ST_VISIBILITY (h->other) - && h->root.type == bfd_link_hash_undefweak)) - - { - /* 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_32 (output_bfd, relocation, - base_got->contents + off); - h->got.offset |= 1; - } - - if ((h->def_regular - && info->shared - && SYMBOL_REFERENCES_LOCAL (info, h)) - /* lrl rx,sym@GOTENT -> larl rx, sym */ - && ((r_type == R_390_GOTENT - && (bfd_get_16 (input_bfd, - contents + rel->r_offset - 2) - & 0xff0f) == 0xc40d) - /* ly 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) == 0x58))) - { - 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 4. 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_32 (output_bfd, relocation, - htab->elf.sgot->contents + off); - - if (info->shared) - { - asection *srelgot; - Elf_Internal_Rela outrel; - bfd_byte *loc; - - srelgot = htab->elf.srelgot; - if (srelgot == NULL) - abort (); - - outrel.r_offset = (htab->elf.sgot->output_section->vma - + htab->elf.sgot->output_offset - + off); - outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE); - outrel.r_addend = relocation; - loc = srelgot->contents; - loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); - } - - local_got_offsets[r_symndx] |= 1; - } - } - - if (off >= (bfd_vma) -2) - abort (); - - relocation = base_got->output_offset + 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 += base_got->output_section->vma; - - break; - - case R_390_GOTOFF16: - case R_390_GOTOFF32: - /* Relocation is relative to the start of the global offset - table. */ - - /* Note that sgot->output_offset is not involved in this - calculation. We always want the start of .got. If we - defined _GLOBAL_OFFSET_TABLE in a different way, as is - permitted by the ABI, we might have to change this - calculation. */ - relocation -= htab->elf.sgot->output_section->vma; - break; - - case R_390_GOTPC: - case R_390_GOTPCDBL: - /* Use global offset table as symbol value. */ - relocation = htab->elf.sgot->output_section->vma; - unresolved_reloc = FALSE; - break; - - case R_390_PLT12DBL: - case R_390_PLT16DBL: - case R_390_PLT24DBL: - case R_390_PLT32DBL: - case R_390_PLT32: - /* 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 && htab->elf.iplt == NULL)) - { - /* 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: - /* 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 -= htab->elf.sgot->output_section->vma; - break; - } - - if (s390_is_ifunc_symbol_p (h)) - relocation = (htab->elf.iplt->output_section->vma - + htab->elf.iplt->output_offset - + h->plt.offset - - htab->elf.sgot->output_section->vma); - else - relocation = (htab->elf.splt->output_section->vma - + htab->elf.splt->output_offset - + h->plt.offset - - htab->elf.sgot->output_section->vma); - unresolved_reloc = FALSE; - break; - - case R_390_8: - case R_390_16: - case R_390_32: - case R_390_PC16: - case R_390_PC12DBL: - case R_390_PC16DBL: - case R_390_PC24DBL: - case R_390_PC32DBL: - case R_390_PC32: - if (h != NULL - && s390_is_ifunc_symbol_p (h) - && h->def_regular) - { - if (!info->shared || !h->non_got_ref) - { - /* For a non-shared object STT_GNU_IFUNC symbol must - go through PLT. */ - 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 - || info->executable) - { - /* This symbol is resolved locally. */ - outrel.r_info = ELF32_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 = ELF32_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 ((input_section->flags & SEC_ALLOC) == 0) - break; - - if ((info->shared - && (h == NULL - || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || 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_PC32DBL - && r_type != R_390_PC32) - || !SYMBOL_CALLS_LOCAL (info, h))) - || (ELIMINATE_COPY_RELOCS - && !info->shared - && 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_PC32DBL - || r_type == R_390_PC32 - || !info->shared - || !SYMBOLIC_BIND (info, h) - || !h->def_regular)) - { - outrel.r_info = ELF32_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_32) - { - relocate = TRUE; - outrel.r_info = ELF32_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 = ELF32_R_INFO (sindx, r_type); - } - } - - sreloc = elf_section_data (input_section)->sreloc; - if (sreloc == NULL) - abort (); - - loc = sreloc->contents; - loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_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_IE32: - if (info->shared) - { - 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 = ELF32_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 (Elf32_External_Rela); - bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); - } - /* Fall through. */ - - case R_390_TLS_GD32: - case R_390_TLS_GOTIE32: - 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 (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) - r_type = R_390_TLS_LE32; - } - if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE) - r_type = R_390_TLS_IE32; - - if (r_type == R_390_TLS_LE32) - { - /* This relocation gets optimized away by the local exec - access optimization. */ - BFD_ASSERT (! unresolved_reloc); - bfd_put_32 (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_GD32) - 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 = ELF32_R_INFO (indx, dr_type); - loc = htab->elf.srelgot->contents; - loc += htab->elf.srelgot->reloc_count++ - * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); - - if (r_type == R_390_TLS_GD32) - { - if (indx == 0) - { - BFD_ASSERT (! unresolved_reloc); - bfd_put_32 (output_bfd, - relocation - dtpoff_base (info), - htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); - } - else - { - outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF); - outrel.r_offset += GOT_ENTRY_SIZE; - outrel.r_addend = 0; - htab->elf.srelgot->reloc_count++; - loc += sizeof (Elf32_External_Rela); - bfd_elf32_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 == ELF32_R_TYPE (rel->r_info)) - { - relocation = htab->elf.sgot->output_offset + off; - if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT) - relocation += htab->elf.sgot->output_section->vma; - unresolved_reloc = FALSE; - } - else - { - bfd_put_32 (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 (info->shared) - goto emit_tls_relocs; - } - else - { - off = h->got.offset; - tls_type = elf_s390_hash_entry(h)->tls_type; - if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) - goto emit_tls_relocs; - } - - if (htab->elf.sgot == NULL) - abort (); - - BFD_ASSERT (! unresolved_reloc); - bfd_put_32 (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_LDM32: - if (! info->shared) - /* 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_32 (output_bfd, 0, - htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); - outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD); - outrel.r_addend = 0; - loc = htab->elf.srelgot->contents; - loc += htab->elf.srelgot->reloc_count++ - * sizeof (Elf32_External_Rela); - bfd_elf32_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_LE32: - if (info->shared) - { - /* 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 = ELF32_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 (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); - } - else - { - BFD_ASSERT (! unresolved_reloc); - bfd_put_32 (output_bfd, -tpoff (info, relocation), - contents + rel->r_offset); - } - continue; - - case R_390_TLS_LDO32: - if (info->shared || (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 (!info->shared && (h == NULL || h->dynindx == -1)) - { - /* IE->LE transition. Four valid cases: - l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 - l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 - l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 - l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ - unsigned int insn, ry; - - insn = bfd_get_32 (input_bfd, contents + rel->r_offset); - ry = 0; - if ((insn & 0xff00f000) == 0x58000000) - /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */ - ry = (insn & 0x000f0000); - else if ((insn & 0xff0f0000) == 0x58000000) - /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */ - ry = (insn & 0x0000f000) << 4; - else if ((insn & 0xff00f000) == 0x5800c000) - /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */ - ry = (insn & 0x000f0000); - else if ((insn & 0xff0f0000) == 0x580c0000) - /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */ - ry = (insn & 0x0000f000) << 4; - else - invalid_tls_insn (input_bfd, input_section, rel); - insn = 0x18000700 | (insn & 0x00f00000) | ry; - bfd_put_32 (output_bfd, insn, contents + rel->r_offset); - } - } - else if (r_type == R_390_TLS_GDCALL) - { - unsigned int insn; - - insn = bfd_get_32 (input_bfd, contents + rel->r_offset); - if ((insn & 0xff000fff) != 0x4d000000 && - (insn & 0xffff0000) != 0xc0e50000 && - (insn & 0xff000000) != 0x0d000000) - invalid_tls_insn (input_bfd, input_section, rel); - if (!info->shared && (h == NULL || h->dynindx == -1)) - { - if ((insn & 0xff000000) == 0x0d000000) - { - /* GD->LE transition. - basr rx, ry -> nopr r7 */ - insn = 0x07070000 | (insn & 0xffff); - } - else if ((insn & 0xff000000) == 0x4d000000) - { - /* GD->LE transition. - bas %r14,0(%rx,%r13) -> bc 0,0 */ - insn = 0x47000000; - } - else - { - /* GD->LE transition. - brasl %r14,_tls_get_offset@plt -> brcl 0,. */ - insn = 0xc0040000; - bfd_put_16 (output_bfd, 0x0000, - contents + rel->r_offset + 4); - } - } - else - { - /* If basr is used in the pic case to invoke - _tls_get_offset, something went wrong before. */ - if ((insn & 0xff000000) == 0x0d000000) - invalid_tls_insn (input_bfd, input_section, rel); - - if ((insn & 0xff000000) == 0x4d000000) - { - /* GD->IE transition. - bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */ - insn = 0x5822c000; - } - else - { - /* GD->IE transition. - brasl %r14,__tls_get_addr@plt -> - l %r2,0(%r2,%r12) ; bcr 0,0 */ - insn = 0x5822c000; - bfd_put_16 (output_bfd, 0x0700, - contents + rel->r_offset + 4); - } - } - bfd_put_32 (output_bfd, insn, contents + rel->r_offset); - } - else if (r_type == R_390_TLS_LDCALL) - { - if (!info->shared) - { - unsigned int insn; - - insn = bfd_get_32 (input_bfd, contents + rel->r_offset); - if ((insn & 0xff000fff) != 0x4d000000 && - (insn & 0xffff0000) != 0xc0e50000 && - (insn & 0xff000000) != 0x0d000000) - invalid_tls_insn (input_bfd, input_section, rel); - - if ((insn & 0xff000000) == 0x0d000000) - { - /* LD->LE transition. - basr rx, ry -> nopr r7 */ - insn = 0x07070000 | (insn & 0xffff); - } - else if ((insn & 0xff000000) == 0x4d000000) - { - /* LD->LE transition. - bas %r14,0(%rx,%r13) -> bc 0,0 */ - insn = 0x47000000; - } - else - { - /* LD->LE transition. - brasl %r14,__tls_get_offset@plt -> brcl 0,. */ - insn = 0xc0040000; - bfd_put_16 (output_bfd, 0x0000, - contents + rel->r_offset + 4); - } - bfd_put_32 (output_bfd, insn, contents + rel->r_offset); - } - } - 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) - (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), - input_bfd, - input_section, - (long) 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 (input_bfd, sec); - } - - if (r == bfd_reloc_overflow) - { - - if (! ((*info->callbacks->reloc_overflow) - (info, (h ? &h->root : NULL), name, howto->name, - (bfd_vma) 0, input_bfd, input_section, - rel->r_offset))) - return FALSE; - } - else - { - (*_bfd_error_handler) - (_("%B(%A+0x%lx): reloc against `%s': error %d"), - input_bfd, input_section, - (long) 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 iplt_offset, - bfd_vma resolver_address) -{ - bfd_vma iplt_index; - bfd_vma got_offset; - bfd_vma igotiplt_offset; - Elf_Internal_Rela rela; - bfd_byte *loc; - asection *plt, *gotplt, *relplt; - bfd_vma relative_offset; - - if (htab->elf.iplt == NULL - || htab->elf.igotplt == NULL - || htab->elf.irelplt == NULL) - abort (); - - gotplt = htab->elf.igotplt; - relplt = htab->elf.irelplt; - - /* Index of the PLT slot within iplt section. */ - iplt_index = iplt_offset / PLT_ENTRY_SIZE; - plt = htab->elf.iplt; - /* Offset into the igot.plt section. */ - igotiplt_offset = iplt_index * GOT_ENTRY_SIZE; - /* Offset into the got section. */ - got_offset = igotiplt_offset + gotplt->output_offset; - - /* S390 uses halfwords for relative branch calc! */ - relative_offset = - (plt->output_offset + - (PLT_ENTRY_SIZE * iplt_index) + 18) / 2; -/* If offset is > 32768, branch to a previous branch - 390 can only handle +-64 K jumps. */ - if ( -32768 > (int) relative_offset ) - relative_offset - = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); - - /* Fill in the entry in the procedure linkage table. */ - if (!info->shared) - { - memcpy (plt->contents + iplt_offset, elf_s390_plt_entry, - PLT_ENTRY_SIZE); - - /* Adjust jump to the first plt entry. */ - bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), - plt->contents + iplt_offset + 20); - - /* Push the GOT offset field. */ - bfd_put_32 (output_bfd, - (gotplt->output_section->vma - + got_offset), - plt->contents + iplt_offset + 24); - } - else if (got_offset < 4096) - { - /* The GOT offset is small enough to be used directly as - displacement. */ - memcpy (plt->contents + iplt_offset, - elf_s390_plt_pic12_entry, - PLT_ENTRY_SIZE); - - /* Put in the GOT offset as displacement value. The 0xc000 - value comes from the first word of the plt entry. Look - at the elf_s390_plt_pic16_entry content. */ - bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset, - plt->contents + iplt_offset + 2); - - /* Adjust the jump to the first plt entry. */ - bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), - plt->contents + iplt_offset + 20); - } - else if (got_offset < 32768) - { - /* The GOT offset is too big for a displacement but small - enough to be a signed 16 bit immediate value as it can be - used in an lhi instruction. */ - memcpy (plt->contents + iplt_offset, - elf_s390_plt_pic16_entry, - PLT_ENTRY_SIZE); - - /* Put in the GOT offset for the lhi instruction. */ - bfd_put_16 (output_bfd, (bfd_vma)got_offset, - plt->contents + iplt_offset + 2); - - /* Adjust the jump to the first plt entry. */ - bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), - plt->contents + iplt_offset + 20); - } - else - { - memcpy (plt->contents + iplt_offset, - elf_s390_plt_pic_entry, - PLT_ENTRY_SIZE); - - /* Adjust the jump to the first plt entry. */ - bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), - plt->contents + iplt_offset + 20); - - /* Push the GOT offset field. */ - bfd_put_32 (output_bfd, got_offset, - plt->contents + iplt_offset + 24); - } - /* Insert offset into reloc. table here. */ - bfd_put_32 (output_bfd, relplt->output_offset + - iplt_index * RELA_ENTRY_SIZE, - plt->contents + iplt_offset + 28); - - /* Fill in the entry in the global offset table. - Points to instruction after GOT offset. */ - bfd_put_32 (output_bfd, - (plt->output_section->vma - + plt->output_offset - + iplt_offset - + 12), - gotplt->contents + igotiplt_offset); - - /* Fill in the entry in the .rela.plt section. */ - rela.r_offset = gotplt->output_section->vma + got_offset; - - if (!h - || h->dynindx == -1 - || ((info->executable - || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) - && h->def_regular)) - { - /* The symbol can be locally resolved. */ - rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE); - rela.r_addend = resolver_address; - } - else - { - rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); - rela.r_addend = 0; - } - - loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE; - bfd_elf32_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 (h->plt.offset != (bfd_vma) -1) - { - bfd_vma plt_index; - bfd_vma got_offset; - Elf_Internal_Rela rela; - bfd_byte *loc; - bfd_vma relative_offset; - - /* This symbol has an entry in the procedure linkage table. Set - it up. */ - if (s390_is_ifunc_symbol_p (h)) - { - /* If we can resolve the IFUNC symbol locally we generate an - IRELATIVE reloc. */ - 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); - /* Fallthrough. 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; - - /* Offset in GOT is PLT index plus GOT headers(3) times 4, - addr & GOT addr. */ - got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; - - /* S390 uses halfwords for relative branch calc! */ - relative_offset = - ((PLT_FIRST_ENTRY_SIZE + - (PLT_ENTRY_SIZE * plt_index) + 18) / 2); - /* If offset is > 32768, branch to a previous branch - 390 can only handle +-64 K jumps. */ - if ( -32768 > (int) relative_offset ) - relative_offset - = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2); - - /* Fill in the entry in the procedure linkage table. */ - if (!info->shared) - { - memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry, - PLT_ENTRY_SIZE); - - /* Adjust jump to the first plt entry. */ - bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), - htab->elf.splt->contents + h->plt.offset + 20); - - /* Push the GOT offset field. */ - bfd_put_32 (output_bfd, - (htab->elf.sgotplt->output_section->vma - + htab->elf.sgotplt->output_offset - + got_offset), - htab->elf.splt->contents + h->plt.offset + 24); - } - else if (got_offset < 4096) - { - /* The GOT offset is small enough to be used directly as - displacement. */ - memcpy (htab->elf.splt->contents + h->plt.offset, - elf_s390_plt_pic12_entry, - PLT_ENTRY_SIZE); - - /* Put in the GOT offset as displacement value. The 0xc000 - value comes from the first word of the plt entry. Look - at the elf_s390_plt_pic16_entry content. */ - bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset, - htab->elf.splt->contents + h->plt.offset + 2); - - /* Adjust the jump to the first plt entry. */ - bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), - htab->elf.splt->contents + h->plt.offset + 20); - } - else if (got_offset < 32768) - { - /* The GOT offset is too big for a displacement but small - enough to be a signed 16 bit immediate value as it can be - used in an lhi instruction. */ - memcpy (htab->elf.splt->contents + h->plt.offset, - elf_s390_plt_pic16_entry, - PLT_ENTRY_SIZE); - - /* Put in the GOT offset for the lhi instruction. */ - bfd_put_16 (output_bfd, (bfd_vma)got_offset, - htab->elf.splt->contents + h->plt.offset + 2); - - /* Adjust the jump to the first plt entry. */ - bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), - htab->elf.splt->contents + h->plt.offset + 20); - } - else - { - memcpy (htab->elf.splt->contents + h->plt.offset, - elf_s390_plt_pic_entry, - PLT_ENTRY_SIZE); - - /* Adjust the jump to the first plt entry. */ - bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16), - htab->elf.splt->contents + h->plt.offset + 20); - - /* Push the GOT offset field. */ - bfd_put_32 (output_bfd, got_offset, - htab->elf.splt->contents + h->plt.offset + 24); - } - /* Insert offset into reloc. table here. */ - bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_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_32 (output_bfd, - (htab->elf.splt->output_section->vma - + htab->elf.splt->output_offset - + h->plt.offset - + 12), - htab->elf.sgotplt->contents + got_offset); - - /* Fill in the entry in the .rela.plt section. */ - rela.r_offset = (htab->elf.sgotplt->output_section->vma - + htab->elf.sgotplt->output_offset - + got_offset); - rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT); - rela.r_addend = 0; - loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela); - bfd_elf32_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 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 && s390_is_ifunc_symbol_p (h)) - { - if (info->shared) - { - /* 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_32 (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 (info->shared - && SYMBOL_REFERENCES_LOCAL (info, h)) - { - /* 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) - return FALSE; - BFD_ASSERT((h->got.offset & 1) != 0); - rela.r_info = ELF32_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_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset); - rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT); - rela.r_addend = 0; - } - - loc = htab->elf.srelgot->contents; - loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); - } - - if (h->needs_copy) - { - Elf_Internal_Rela rela; - 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->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 = ELF32_R_INFO (h->dynindx, R_390_COPY); - rela.r_addend = 0; - loc = htab->srelbss->contents; - loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_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) -{ - switch ((int) ELF32_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); - dynobj = htab->elf.dynobj; - sdyn = bfd_get_linker_section (dynobj, ".dynamic"); - - if (htab->elf.dynamic_sections_created) - { - Elf32_External_Dyn *dyncon, *dynconend; - - if (sdyn == NULL || htab->elf.sgot == NULL) - abort (); - - dyncon = (Elf32_External_Dyn *) sdyn->contents; - dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); - for (; dyncon < dynconend; dyncon++) - { - Elf_Internal_Dyn dyn; - asection *s; - - bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); - - switch (dyn.d_tag) - { - default: - continue; - - case DT_PLTGOT: - dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma; - break; - - case DT_JMPREL: - dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; - break; - - case DT_PLTRELSZ: - s = htab->elf.srelplt->output_section; - dyn.d_un.d_val = s->size; - break; - } - - bfd_elf32_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) - { - memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE); - if (info->shared) - { - memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry, - PLT_FIRST_ENTRY_SIZE); - } - else - { - memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry, - PLT_FIRST_ENTRY_SIZE); - bfd_put_32 (output_bfd, - htab->elf.sgotplt->output_section->vma - + htab->elf.sgotplt->output_offset, - htab->elf.splt->contents + 24); - } - elf_section_data (htab->elf.splt->output_section) - ->this_hdr.sh_entsize = 4; - } - - } - - if (htab->elf.sgotplt) - { - /* Fill in the first three entries in the global offset table. */ - if (htab->elf.sgotplt->size > 0) - { - bfd_put_32 (output_bfd, - (sdyn == NULL ? (bfd_vma) 0 - : sdyn->output_section->vma + sdyn->output_offset), - htab->elf.sgotplt->contents); - /* One entry for shared object struct ptr. */ - bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4); - /* One entry for _dl_runtime_resolve. */ - bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8); - } - - elf_section_data (htab->elf.sgotplt->output_section) - ->this_hdr.sh_entsize = 4; - } - /* 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); - - 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->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; -} - -static bfd_boolean -elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note) -{ - int offset; - unsigned int size; - - switch (note->descsz) - { - default: - return FALSE; - - case 224: /* S/390 Linux. */ - /* 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 + 24); - - /* pr_reg */ - offset = 72; - size = 144; - break; - } - - /* Make a ".reg/999" section. */ - return _bfd_elfcore_make_pseudosection (abfd, ".reg", - size, note->descpos + offset); -} - -/* 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; -} - -static bfd_boolean -elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd) -{ - elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags; - return TRUE; -} - - -#define TARGET_BIG_SYM bfd_elf32_s390_vec -#define TARGET_BIG_NAME "elf32-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_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 12 -#define elf_backend_rela_normal 1 - -#define elf_info_to_howto elf_s390_info_to_howto - -#define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name -#define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create -#define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup -#define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup - -#define bfd_elf32_bfd_merge_private_bfd_data elf32_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 elf_s390_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_gc_sweep_hook elf_s390_gc_sweep_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_plt_sym_val elf_s390_plt_sym_val -#define elf_backend_add_symbol_hook elf_s390_add_symbol_hook - -#define bfd_elf32_mkobject elf_s390_mkobject -#define elf_backend_object_p elf_s390_object_p - -#include "elf32-target.h" |