diff options
Diffstat (limited to 'binutils-2.25/bfd/elf32-s390.c')
| -rw-r--r-- | binutils-2.25/bfd/elf32-s390.c | 4029 |
1 files changed, 4029 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf32-s390.c b/binutils-2.25/bfd/elf32-s390.c new file mode 100644 index 00000000..6467b032 --- /dev/null +++ b/binutils-2.25/bfd/elf32-s390.c @@ -0,0 +1,4029 @@ +/* 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" |