diff options
| author | Christian Svensson <blue@cmd.nu> | 2014-04-22 15:57:47 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2014-04-22 15:57:47 +0100 |
| commit | 73589c9dbddc7906fa6a150f2a2a0ff6b746e8ba (patch) | |
| tree | 92412e946a93c7cee10640c68d2cd79f4e786c9f /bfd/elf32-or1k.c | |
| parent | a75fef0e5bc3bfeb4eac434c1c68831f55ab597d (diff) | |
| download | gdb-73589c9dbddc7906fa6a150f2a2a0ff6b746e8ba.zip gdb-73589c9dbddc7906fa6a150f2a2a0ff6b746e8ba.tar.gz gdb-73589c9dbddc7906fa6a150f2a2a0ff6b746e8ba.tar.bz2 | |
Remove support for the (deprecated) openrisc and or32 configurations and replace
with support for the new or1k configuration.
Diffstat (limited to 'bfd/elf32-or1k.c')
| -rw-r--r-- | bfd/elf32-or1k.c | 2872 |
1 files changed, 2872 insertions, 0 deletions
diff --git a/bfd/elf32-or1k.c b/bfd/elf32-or1k.c new file mode 100644 index 0000000..c7f1875 --- /dev/null +++ b/bfd/elf32-or1k.c @@ -0,0 +1,2872 @@ +/* Or1k-specific support for 32-bit ELF. + Copyright 2001-2014 Free Software Foundation, Inc. + Contributed for OR32 by Johan Rydberg, jrydberg@opencores.org + + PIC parts added by Stefan Kristiansson, stefan.kristiansson@saunalahti.fi, + largely based on elf32-m32r.c and elf32-microblaze.c. + + 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, see <http://www.gnu.org/licenses/>. */ + +#include "sysdep.h" +#include "bfd.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/or1k.h" +#include "libiberty.h" + +#define PLT_ENTRY_SIZE 20 + +#define PLT0_ENTRY_WORD0 0x19800000 /* l.movhi r12, 0 <- hi(.got+4) */ +#define PLT0_ENTRY_WORD1 0xa98c0000 /* l.ori r12, r12, 0 <- lo(.got+4) */ +#define PLT0_ENTRY_WORD2 0x85ec0004 /* l.lwz r15, 4(r12) <- *(.got+8)*/ +#define PLT0_ENTRY_WORD3 0x44007800 /* l.jr r15 */ +#define PLT0_ENTRY_WORD4 0x858c0000 /* l.lwz r12, 0(r12) */ + +#define PLT0_PIC_ENTRY_WORD0 0x85900004 /* l.lwz r12, 4(r16) */ +#define PLT0_PIC_ENTRY_WORD1 0x85f00008 /* l.lwz r15, 8(r16) */ +#define PLT0_PIC_ENTRY_WORD2 0x44007800 /* l.jr r15 */ +#define PLT0_PIC_ENTRY_WORD3 0x15000000 /* l.nop */ +#define PLT0_PIC_ENTRY_WORD4 0x15000000 /* l.nop */ + +#define PLT_ENTRY_WORD0 0x19800000 /* l.movhi r12, 0 <- hi(got idx addr) */ +#define PLT_ENTRY_WORD1 0xa98c0000 /* l.ori r12, r12, 0 <- lo(got idx addr) */ +#define PLT_ENTRY_WORD2 0x858c0000 /* l.lwz r12, 0(r12) */ +#define PLT_ENTRY_WORD3 0x44006000 /* l.jr r12 */ +#define PLT_ENTRY_WORD4 0xa9600000 /* l.ori r11, r0, 0 <- reloc offset */ + +#define PLT_PIC_ENTRY_WORD0 0x85900000 /* l.lwz r12, 0(r16) <- index in got */ +#define PLT_PIC_ENTRY_WORD1 0xa9600000 /* l.ori r11, r0, 0 <- reloc offset */ +#define PLT_PIC_ENTRY_WORD2 0x44006000 /* l.jr r12 */ +#define PLT_PIC_ENTRY_WORD3 0x15000000 /* l.nop */ +#define PLT_PIC_ENTRY_WORD4 0x15000000 /* l.nop */ + +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" + +static reloc_howto_type or1k_elf_howto_table[] = +{ + /* This reloc does nothing. */ + HOWTO (R_OR1K_NONE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_NONE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_32, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_unsigned, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_unsigned, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_8, + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_unsigned, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_8", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_LO_16_IN_INSN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_LO_16_IN_INSN", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_HI_16_IN_INSN, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_HI_16_IN_INSN", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A PC relative 26 bit relocation, right shifted by 2. */ + HOWTO (R_OR1K_INSN_REL_26, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_INSN_REL_26", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x03ffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy. */ + HOWTO (R_OR1K_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_OR1K_GNU_VTINHERIT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable member usage. */ + HOWTO (R_OR1K_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + _bfd_elf_rel_vtable_reloc_fn, /* special_function */ + "R_OR1K_GNU_VTENTRY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_32_PCREL, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_32_PCREL", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_16_PCREL, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_16_PCREL", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_8_PCREL, + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_8_PCREL", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_GOTPC_HI16, /* Type. */ + 16, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + TRUE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain on overflow. */ + bfd_elf_generic_reloc, /* Special Function. */ + "R_OR1K_GOTPC_HI16", /* Name. */ + FALSE, /* Partial Inplace. */ + 0, /* Source Mask. */ + 0xffff, /* Dest Mask. */ + TRUE), /* PC relative offset? */ + + HOWTO (R_OR1K_GOTPC_LO16, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + TRUE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain on overflow. */ + bfd_elf_generic_reloc, /* Special Function. */ + "R_OR1K_GOTPC_LO16", /* Name. */ + FALSE, /* Partial Inplace. */ + 0, /* Source Mask. */ + 0xffff, /* Dest Mask. */ + TRUE), /* PC relative offset? */ + + HOWTO (R_OR1K_GOT16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_GOT16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 26 bit PLT relocation. Shifted by 2. */ + HOWTO (R_OR1K_PLT26, /* Type. */ + 2, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 26, /* Bitsize. */ + TRUE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain on overflow. */ + bfd_elf_generic_reloc,/* Special Function. */ + "R_OR1K_PLT26", /* Name. */ + FALSE, /* Partial Inplace. */ + 0, /* Source Mask. */ + 0x03ffffff, /* Dest Mask. */ + TRUE), /* PC relative offset? */ + + HOWTO (R_OR1K_GOTOFF_HI16, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_GOTOFF_HI16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_GOTOFF_LO16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_GOTOFF_LO16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_COPY, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_COPY", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_GLOB_DAT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_GLOB_DAT", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_JMP_SLOT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_JMP_SLOT", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_RELATIVE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_RELATIVE", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_GD_HI16, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_GD_HI16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_GD_LO16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_GD_LO16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_LDM_HI16, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_LDM_HI16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_LDM_LO16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_LDM_LO16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_LDO_HI16, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_LDO_HI16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_LDO_LO16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_LDO_LO16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_IE_HI16, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_IE_HI16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_IE_LO16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_IE_LO16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_LE_HI16, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_LE_HI16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OR1K_TLS_LE_LO16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OR1K_TLS_LE_LO16", /* name */ + FALSE, /* partial_inplace */ + 0x0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + +}; + +/* Map BFD reloc types to Or1k ELF reloc types. */ + +struct or1k_reloc_map +{ + bfd_reloc_code_real_type bfd_reloc_val; + unsigned int or1k_reloc_val; +}; + +static const struct or1k_reloc_map or1k_reloc_map[] = +{ + { BFD_RELOC_NONE, R_OR1K_NONE }, + { BFD_RELOC_32, R_OR1K_32 }, + { BFD_RELOC_16, R_OR1K_16 }, + { BFD_RELOC_8, R_OR1K_8 }, + { BFD_RELOC_LO16, R_OR1K_LO_16_IN_INSN }, + { BFD_RELOC_HI16, R_OR1K_HI_16_IN_INSN }, + { BFD_RELOC_OR1K_REL_26, R_OR1K_INSN_REL_26 }, + { BFD_RELOC_VTABLE_ENTRY, R_OR1K_GNU_VTENTRY }, + { BFD_RELOC_VTABLE_INHERIT, R_OR1K_GNU_VTINHERIT }, + { BFD_RELOC_32_PCREL, R_OR1K_32_PCREL }, + { BFD_RELOC_16_PCREL, R_OR1K_16_PCREL }, + { BFD_RELOC_8_PCREL, R_OR1K_8_PCREL }, + { BFD_RELOC_OR1K_GOTPC_HI16, R_OR1K_GOTPC_HI16 }, + { BFD_RELOC_OR1K_GOTPC_LO16, R_OR1K_GOTPC_LO16 }, + { BFD_RELOC_OR1K_GOT16, R_OR1K_GOT16 }, + { BFD_RELOC_OR1K_PLT26, R_OR1K_PLT26 }, + { BFD_RELOC_OR1K_GOTOFF_HI16, R_OR1K_GOTOFF_HI16 }, + { BFD_RELOC_OR1K_GOTOFF_LO16, R_OR1K_GOTOFF_LO16 }, + { BFD_RELOC_OR1K_GLOB_DAT, R_OR1K_GLOB_DAT }, + { BFD_RELOC_OR1K_COPY, R_OR1K_COPY }, + { BFD_RELOC_OR1K_JMP_SLOT, R_OR1K_JMP_SLOT }, + { BFD_RELOC_OR1K_RELATIVE, R_OR1K_RELATIVE }, + { BFD_RELOC_OR1K_TLS_GD_HI16, R_OR1K_TLS_GD_HI16 }, + { BFD_RELOC_OR1K_TLS_GD_LO16, R_OR1K_TLS_GD_LO16 }, + { BFD_RELOC_OR1K_TLS_LDM_HI16, R_OR1K_TLS_LDM_HI16 }, + { BFD_RELOC_OR1K_TLS_LDM_LO16, R_OR1K_TLS_LDM_LO16 }, + { BFD_RELOC_OR1K_TLS_LDO_HI16, R_OR1K_TLS_LDO_HI16 }, + { BFD_RELOC_OR1K_TLS_LDO_LO16, R_OR1K_TLS_LDO_LO16 }, + { BFD_RELOC_OR1K_TLS_IE_HI16, R_OR1K_TLS_IE_HI16 }, + { BFD_RELOC_OR1K_TLS_IE_LO16, R_OR1K_TLS_IE_LO16 }, + { BFD_RELOC_OR1K_TLS_LE_HI16, R_OR1K_TLS_LE_HI16 }, + { BFD_RELOC_OR1K_TLS_LE_LO16, R_OR1K_TLS_LE_LO16 }, +}; + +/* The linker needs to keep track of the number of relocs that it + decides to copy as dynamic relocs in check_relocs for each symbol. + This is so that it can later discard them if they are found to be + unnecessary. We store the information in a field extending the + regular ELF linker hash table. */ + +struct elf_or1k_dyn_relocs +{ + struct elf_or1k_dyn_relocs *next; + + /* The input section of the reloc. */ + asection *sec; + + /* Total number of relocs copied for the input section. */ + bfd_size_type count; + + /* Number of pc-relative relocs copied for the input section. */ + bfd_size_type pc_count; +}; + +#define TLS_UNKNOWN 0 +#define TLS_NONE 1 +#define TLS_GD 2 +#define TLS_LD 3 +#define TLS_IE 4 +#define TLS_LE 5 + +/* ELF linker hash entry. */ +struct elf_or1k_link_hash_entry +{ + struct elf_link_hash_entry root; + + /* Track dynamic relocs copied for this symbol. */ + struct elf_or1k_dyn_relocs *dyn_relocs; + + /* Track type of TLS access. */ + unsigned char tls_type; +}; + +/* ELF object data. */ +struct elf_or1k_obj_tdata +{ + struct elf_obj_tdata root; + + /* tls_type for each local got entry. */ + unsigned char *local_tls_type; +}; + +#define elf_or1k_tdata(abfd) \ + ((struct elf_or1k_obj_tdata *) (abfd)->tdata.any) + +#define elf_or1k_local_tls_type(abfd) \ + (elf_or1k_tdata (abfd)->local_tls_type) + +/* ELF linker hash table. */ +struct elf_or1k_link_hash_table +{ + struct elf_link_hash_table root; + + /* Short-cuts to get to dynamic linker sections. */ + asection *sgot; + asection *sgotplt; + asection *srelgot; + asection *splt; + asection *srelplt; + asection *sdynbss; + asection *srelbss; + + /* Small local sym to section mapping cache. */ + struct sym_cache sym_sec; +}; + +/* Get the ELF linker hash table from a link_info structure. */ +#define or1k_elf_hash_table(p) \ + (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ + == OR1K_ELF_DATA ? ((struct elf_or1k_link_hash_table *) ((p)->hash)) : NULL) + +static bfd_boolean +elf_or1k_mkobject (bfd *abfd) +{ + return bfd_elf_allocate_object (abfd, sizeof (struct elf_or1k_obj_tdata), + OR1K_ELF_DATA); +} + +/* Create an entry in an or1k ELF linker hash table. */ + +static struct bfd_hash_entry * +or1k_elf_link_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + struct elf_or1k_link_hash_entry *ret = + (struct elf_or1k_link_hash_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == NULL) + ret = bfd_hash_allocate (table, + sizeof (struct elf_or1k_link_hash_entry)); + if (ret == NULL) + return NULL; + + /* Call the allocation method of the superclass. */ + ret = ((struct elf_or1k_link_hash_entry *) + _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, + table, string)); + if (ret != NULL) + { + struct elf_or1k_link_hash_entry *eh; + + eh = (struct elf_or1k_link_hash_entry *) ret; + eh->dyn_relocs = NULL; + eh->tls_type = TLS_UNKNOWN; + } + + return (struct bfd_hash_entry *) ret; +} + +/* Create an or1k ELF linker hash table. */ + +static struct bfd_link_hash_table * +or1k_elf_link_hash_table_create (bfd *abfd) +{ + struct elf_or1k_link_hash_table *ret; + bfd_size_type amt = sizeof (struct elf_or1k_link_hash_table); + + ret = bfd_zmalloc (amt); + if (ret == NULL) + return NULL; + + if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, + or1k_elf_link_hash_newfunc, + sizeof (struct elf_or1k_link_hash_entry), + OR1K_ELF_DATA)) + { + free (ret); + return NULL; + } + + return &ret->root.root; +} + +static reloc_howto_type * +or1k_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + unsigned int i; + + for (i = ARRAY_SIZE (or1k_reloc_map); --i;) + if (or1k_reloc_map[i].bfd_reloc_val == code) + return & or1k_elf_howto_table[or1k_reloc_map[i].or1k_reloc_val]; + + return NULL; +} + +static reloc_howto_type * +or1k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < (sizeof (or1k_elf_howto_table) + / sizeof (or1k_elf_howto_table[0])); + i++) + if (or1k_elf_howto_table[i].name != NULL + && strcasecmp (or1k_elf_howto_table[i].name, r_name) == 0) + return &or1k_elf_howto_table[i]; + + return NULL; +} + +/* Set the howto pointer for an Or1k ELF reloc. */ + +static void +or1k_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, + arelent * cache_ptr, + Elf_Internal_Rela * dst) +{ + unsigned int r_type; + + r_type = ELF32_R_TYPE (dst->r_info); + BFD_ASSERT (r_type < (unsigned int) R_OR1K_max); + cache_ptr->howto = & or1k_elf_howto_table[r_type]; +} + + +/* Return the relocation value for @tpoff relocations.. */ +static bfd_vma +tpoff (struct bfd_link_info *info, bfd_vma address) +{ + /* If tls_sec is NULL, we should have signalled an error already. */ + if (elf_hash_table (info)->tls_sec == NULL) + return 0; + + /* The thread pointer on or1k stores the address after the TCB where + the data is, just compute the difference. No need to compensate + for the size of TCB. */ + return (address - elf_hash_table (info)->tls_sec->vma); +} + +/* Relocate an Or1k ELF section. + + The RELOCATE_SECTION function is called by the new ELF backend linker + to handle the relocations for a section. + + The relocs are always passed as Rela structures; if the section + actually uses Rel structures, the r_addend field will always be + zero. + + This function is responsible for adjusting the section contents as + necessary, and (if using Rela relocs and generating a relocatable + output file) adjusting the reloc addend as necessary. + + This function does not have to worry about setting the reloc + address or the reloc symbol index. + + LOCAL_SYMS is a pointer to the swapped in local symbols. + + LOCAL_SECTIONS is an array giving the section in the input file + corresponding to the st_shndx field of each local symbol. + + The global hash table entry for the global symbols can be found + via elf_sym_hashes (input_bfd). + + When generating relocatable output, this function must handle + STB_LOCAL/STT_SECTION symbols specially. The output symbol is + going to be the section symbol corresponding to the output + section, which means that the addend must be adjusted + accordingly. */ + +static bfd_boolean +or1k_elf_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) +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + struct elf_or1k_link_hash_table *htab = or1k_elf_hash_table (info); + bfd *dynobj; + asection *sreloc; + bfd_vma *local_got_offsets; + asection *sgot; + + if (htab == NULL) + return FALSE; + + dynobj = htab->root.dynobj; + local_got_offsets = elf_local_got_offsets (input_bfd); + + sreloc = elf_section_data (input_section)->sreloc; + + sgot = htab->sgot; + + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + relend = relocs + input_section->reloc_count; + + for (rel = relocs; rel < relend; rel++) + { + reloc_howto_type *howto; + unsigned long r_symndx; + Elf_Internal_Sym *sym; + asection *sec; + struct elf_link_hash_entry *h; + bfd_vma relocation; + bfd_reloc_status_type r; + const char *name = NULL; + int r_type; + + r_type = ELF32_R_TYPE (rel->r_info); + r_symndx = ELF32_R_SYM (rel->r_info); + + if (r_type == R_OR1K_GNU_VTINHERIT + || r_type == R_OR1K_GNU_VTENTRY) + continue; + + if (r_type < 0 || r_type >= (int) R_OR1K_max) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + howto = or1k_elf_howto_table + ELF32_R_TYPE (rel->r_info); + h = NULL; + sym = NULL; + sec = NULL; + + if (r_symndx < symtab_hdr->sh_info) + { + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); + + name = bfd_elf_string_from_elf_section + (input_bfd, symtab_hdr->sh_link, sym->st_name); + name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; + } + else + { + bfd_boolean unresolved_reloc, warned, ignored; + + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned, ignored); + } + + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, howto, 0, contents); + + if (info->relocatable) + continue; + + switch (howto->type) + { + case R_OR1K_PLT26: + { + if (htab->splt != NULL && h != NULL + && h->plt.offset != (bfd_vma) -1) + { + relocation = (htab->splt->output_section->vma + + htab->splt->output_offset + + h->plt.offset); + } + break; + } + + case R_OR1K_GOT16: + /* Relocation is to the entry for this symbol in the global + offset table. */ + BFD_ASSERT (sgot != NULL); + if (h != NULL) + { + bfd_boolean dyn; + bfd_vma off; + + off = h->got.offset; + BFD_ASSERT (off != (bfd_vma) -1); + + dyn = htab->root.dynamic_sections_created; + if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) + || (info->shared + && (info->symbolic + || h->dynindx == -1 + || h->forced_local) + && h->def_regular)) + { + /* 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 4, we use the + least significant bit to record whether we have + initialized it already. + + When doing a dynamic link, we create a .rela.got + relocation entry to initialize the value. This + is done in the finish_dynamic_symbol routine. */ + if ((off & 1) != 0) + off &= ~1; + else + { + /* Write entry in GOT. */ + bfd_put_32 (output_bfd, relocation, + sgot->contents + off); + /* Mark GOT entry as having been written. */ + h->got.offset |= 1; + } + } + + relocation = sgot->output_offset + off; + } + else + { + bfd_vma off; + bfd_byte *loc; + + BFD_ASSERT (local_got_offsets != NULL + && local_got_offsets[r_symndx] != (bfd_vma) -1); + + /* Get offset into GOT table. */ + 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 processed this entry. */ + if ((off & 1) != 0) + off &= ~1; + else + { + /* Write entry in GOT. */ + bfd_put_32 (output_bfd, relocation, sgot->contents + off); + if (info->shared) + { + asection *srelgot; + Elf_Internal_Rela outrel; + + /* We need to generate a R_OR1K_RELATIVE reloc + for the dynamic linker. */ + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srelgot != NULL); + + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + off); + outrel.r_info = ELF32_R_INFO (0, R_OR1K_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); + ++srelgot->reloc_count; + } + + local_got_offsets[r_symndx] |= 1; + } + relocation = sgot->output_offset + off; + } + + /* Addend should be zero. */ + if (rel->r_addend != 0) + (*_bfd_error_handler) + (_("internal error: addend should be zero for R_OR1K_GOT16")); + + break; + + case R_OR1K_GOTOFF_LO16: + case R_OR1K_GOTOFF_HI16: + /* Relocation is offset from GOT. */ + BFD_ASSERT (sgot != NULL); + relocation -= sgot->output_section->vma; + break; + + case R_OR1K_INSN_REL_26: + case R_OR1K_HI_16_IN_INSN: + case R_OR1K_LO_16_IN_INSN: + case R_OR1K_32: + /* R_OR1K_16? */ + { + /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols + from removed linkonce sections, or sections discarded by + a linker script. */ + if (r_symndx == STN_UNDEF + || (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) + && (!howto->pc_relative + || (h != NULL + && h->dynindx != -1 + && (!info->symbolic + || !h->def_regular)))) + || (!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_byte *loc; + bfd_boolean skip; + + /* When generating a shared object, these relocations + are copied into the output file to be resolved at run + time. */ + + BFD_ASSERT (sreloc != NULL); + + skip = 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; + outrel.r_offset += (input_section->output_section->vma + + input_section->output_offset); + + if (skip) + memset (&outrel, 0, sizeof outrel); + /* h->dynindx may be -1 if the symbol was marked to + become local. */ + else if (h != NULL + && ((! info->symbolic && h->dynindx != -1) + || !h->def_regular)) + { + BFD_ASSERT (h->dynindx != -1); + outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); + outrel.r_addend = rel->r_addend; + } + else + { + if (r_type == R_OR1K_32) + { + outrel.r_info = ELF32_R_INFO (0, R_OR1K_RELATIVE); + outrel.r_addend = relocation + rel->r_addend; + } + else + { + BFD_FAIL (); + (*_bfd_error_handler) + (_("%B: probably compiled without -fPIC?"), + input_bfd); + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + } + + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + break; + } + break; + } + + case R_OR1K_TLS_LDM_HI16: + case R_OR1K_TLS_LDM_LO16: + case R_OR1K_TLS_LDO_HI16: + case R_OR1K_TLS_LDO_LO16: + /* TODO: implement support for local dynamic. */ + BFD_FAIL (); + (*_bfd_error_handler) + (_("%B: support for local dynamic not implemented"), + input_bfd); + bfd_set_error (bfd_error_bad_value); + return FALSE; + + + case R_OR1K_TLS_GD_HI16: + case R_OR1K_TLS_GD_LO16: + case R_OR1K_TLS_IE_HI16: + case R_OR1K_TLS_IE_LO16: + { + bfd_vma gotoff; + Elf_Internal_Rela rela; + bfd_byte *loc; + int dynamic; + + /* Mark as TLS related GOT entry by setting + bit 2 as well as bit 1. */ + if (h != NULL) + { + gotoff = h->got.offset; + h->got.offset |= 3; + } + else + { + gotoff = local_got_offsets[r_symndx]; + local_got_offsets[r_symndx] |= 3; + } + + /* Only process the relocation once. */ + if (gotoff & 1) + { + relocation = sgot->output_offset + (gotoff & ~3); + break; + } + + BFD_ASSERT (elf_hash_table (info)->hgot == NULL + || elf_hash_table (info)->hgot->root.u.def.value == 0); + + /* Dynamic entries will require relocations. if we do not need + them we will just use the default R_OR1K_NONE and + not set anything. */ + dynamic = info->shared + || (sec && (sec->flags & SEC_ALLOC) != 0 + && h != NULL + && (h->root.type == bfd_link_hash_defweak || !h->def_regular)); + + /* Shared GD. */ + if (dynamic && (howto->type == R_OR1K_TLS_GD_HI16 + || howto->type == R_OR1K_TLS_GD_LO16)) + { + int i; + + /* Add DTPMOD and DTPOFF GOT and rela entries. */ + for (i = 0; i < 2; ++i) + { + rela.r_offset = sgot->output_section->vma + + sgot->output_offset + gotoff + i*4; + if (h != NULL && h->dynindx != -1) + { + rela.r_info = ELF32_R_INFO (h->dynindx, + (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF)); + rela.r_addend = 0; + } + else + { + rela.r_info = ELF32_R_INFO (0, + (i == 0 ? R_OR1K_TLS_DTPMOD : R_OR1K_TLS_DTPOFF)); + rela.r_addend = tpoff (info, relocation); + } + + loc = sreloc->contents; + loc += sreloc->reloc_count++ * + sizeof (Elf32_External_Rela); + + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + bfd_put_32 (output_bfd, 0, sgot->contents + gotoff + i*4); + } + } + /* Static GD. */ + else if (howto->type == R_OR1K_TLS_GD_HI16 + || howto->type == R_OR1K_TLS_GD_LO16) + { + bfd_put_32 (output_bfd, 1, sgot->contents + gotoff); + bfd_put_32 (output_bfd, tpoff (info, relocation), + sgot->contents + gotoff + 4); + } + /* Shared IE. */ + else if (dynamic) + { + /* Add TPOFF GOT and rela entries. */ + rela.r_offset = sgot->output_section->vma + + sgot->output_offset + gotoff; + if (h != NULL && h->dynindx != -1) + { + rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_TLS_TPOFF); + rela.r_addend = 0; + } + else + { + rela.r_info = ELF32_R_INFO (0, R_OR1K_TLS_TPOFF); + rela.r_addend = tpoff (info, relocation); + } + + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); + + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + bfd_put_32 (output_bfd, 0, sgot->contents + gotoff); + } + /* Static IE. */ + else + { + bfd_put_32 (output_bfd, tpoff (info, relocation), + sgot->contents + gotoff); + } + relocation = sgot->output_offset + gotoff; + break; + } + case R_OR1K_TLS_LE_HI16: + case R_OR1K_TLS_LE_LO16: + + /* Relocation is offset from TP. */ + relocation = tpoff (info, relocation); + break; + + case R_OR1K_TLS_DTPMOD: + case R_OR1K_TLS_DTPOFF: + case R_OR1K_TLS_TPOFF: + /* These are resolved dynamically on load and shouldn't + be used as linker input. */ + BFD_FAIL (); + (*_bfd_error_handler) + (_("%B: will not resolve runtime TLS relocation"), + input_bfd); + bfd_set_error (bfd_error_bad_value); + return FALSE; + + default: + break; + } + 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 *msg = NULL; + + switch (r) + { + case bfd_reloc_overflow: + r = info->callbacks->reloc_overflow + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, rel->r_offset); + break; + + case bfd_reloc_undefined: + r = info->callbacks->undefined_symbol + (info, name, input_bfd, input_section, rel->r_offset, TRUE); + break; + + case bfd_reloc_outofrange: + msg = _("internal error: out of range error"); + break; + + case bfd_reloc_notsupported: + msg = _("internal error: unsupported relocation error"); + break; + + case bfd_reloc_dangerous: + msg = _("internal error: dangerous relocation"); + break; + + default: + msg = _("internal error: unknown error"); + break; + } + + if (msg) + r = info->callbacks->warning + (info, msg, name, input_bfd, input_section, rel->r_offset); + + if (!r) + return FALSE; + } + } + + return TRUE; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +or1k_elf_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_OR1K_GNU_VTINHERIT: + case R_OR1K_GNU_VTENTRY: + return NULL; + } + + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); +} + +static bfd_boolean +or1k_elf_gc_sweep_hook (bfd *abfd, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + asection *sec, + const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) +{ + /* Update the got entry reference counts for the section being removed. */ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + bfd_signed_vma *local_got_refcounts; + const Elf_Internal_Rela *rel, *relend; + + elf_section_data (sec)->local_dynrel = NULL; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + 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; + struct elf_link_hash_entry *h = NULL; + + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + 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; + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_OR1K_GOT16: + if (h != NULL) + { + if (h->got.refcount > 0) + h->got.refcount--; + } + else + { + if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx]--; + } + break; + + default: + break; + } + } + return TRUE; +} + +/* 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_or1k_link_hash_table *htab; + asection *s; + + /* This function may be called more than once. */ + s = bfd_get_section_by_name (dynobj, ".got"); + if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) + return TRUE; + + htab = or1k_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + if (! _bfd_elf_create_got_section (dynobj, info)) + return FALSE; + + htab->sgot = bfd_get_section_by_name (dynobj, ".got"); + htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); + htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + + if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot) + abort (); + + if (! bfd_set_section_flags (dynobj, htab->srelgot, SEC_ALLOC + | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY) + || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) + return FALSE; + + return TRUE; +} + +/* Look through the relocs for a section during the first phase. */ + +static bfd_boolean +or1k_elf_check_relocs (bfd *abfd, + struct bfd_link_info *info, + asection *sec, + const Elf_Internal_Rela *relocs) +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel; + + const Elf_Internal_Rela *rel_end; + struct elf_or1k_link_hash_table *htab; + bfd *dynobj; + asection *sreloc = NULL; + + if (info->relocatable) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + + htab = or1k_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + dynobj = htab->root.dynobj; + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + struct elf_link_hash_entry *h; + unsigned long r_symndx; + unsigned char tls_type; + + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + 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; + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_OR1K_TLS_GD_HI16: + case R_OR1K_TLS_GD_LO16: + tls_type = TLS_GD; + break; + case R_OR1K_TLS_LDM_HI16: + case R_OR1K_TLS_LDM_LO16: + case R_OR1K_TLS_LDO_HI16: + case R_OR1K_TLS_LDO_LO16: + tls_type = TLS_LD; + break; + case R_OR1K_TLS_IE_HI16: + case R_OR1K_TLS_IE_LO16: + tls_type = TLS_IE; + break; + case R_OR1K_TLS_LE_HI16: + case R_OR1K_TLS_LE_LO16: + tls_type = TLS_LE; + break; + default: + tls_type = TLS_NONE; + } + + /* Record TLS type. */ + if (h != NULL) + ((struct elf_or1k_link_hash_entry *) h)->tls_type = tls_type; + else + { + unsigned char *local_tls_type; + + /* This is a TLS type record for a local symbol. */ + local_tls_type = (unsigned char *) elf_or1k_local_tls_type (abfd); + if (local_tls_type == NULL) + { + bfd_size_type size; + + size = symtab_hdr->sh_info; + local_tls_type = bfd_zalloc (abfd, size); + if (local_tls_type == NULL) + return FALSE; + elf_or1k_local_tls_type (abfd) = local_tls_type; + } + local_tls_type[r_symndx] = tls_type; + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_OR1K_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_OR1K_GNU_VTENTRY: + BFD_ASSERT (h != NULL); + if (h != NULL + && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; + + /* This relocation requires .plt entry. */ + case R_OR1K_PLT26: + if (h != NULL) + { + h->needs_plt = 1; + h->plt.refcount += 1; + } + break; + + case R_OR1K_GOT16: + case R_OR1K_GOTOFF_HI16: + case R_OR1K_GOTOFF_LO16: + case R_OR1K_TLS_GD_HI16: + case R_OR1K_TLS_GD_LO16: + case R_OR1K_TLS_IE_HI16: + case R_OR1K_TLS_IE_LO16: + if (htab->sgot == NULL) + { + if (dynobj == NULL) + htab->root.dynobj = dynobj = abfd; + if (! create_got_section (dynobj, info)) + return FALSE; + } + + /* TLS specific. */ + if (ELF32_R_TYPE (rel->r_info) >= R_OR1K_TLS_GD_HI16 && + ELF32_R_TYPE (rel->r_info) <= R_OR1K_TLS_IE_LO16) + { + /* Set which rela section to use. */ + elf_section_data (sec)->sreloc = + bfd_get_section_by_name (dynobj, ".rela.got");; + } + + if (ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_HI16 && + ELF32_R_TYPE (rel->r_info) != R_OR1K_GOTOFF_LO16) + { + if (h != NULL) + h->got.refcount += 1; + else + { + bfd_signed_vma *local_got_refcounts; + + /* This is a global offset table entry for a local symbol. */ + local_got_refcounts = elf_local_got_refcounts (abfd); + if (local_got_refcounts == NULL) + { + bfd_size_type size; + + size = symtab_hdr->sh_info; + size *= sizeof (bfd_signed_vma); + local_got_refcounts = bfd_zalloc (abfd, size); + if (local_got_refcounts == NULL) + return FALSE; + elf_local_got_refcounts (abfd) = local_got_refcounts; + } + local_got_refcounts[r_symndx] += 1; + } + } + break; + + case R_OR1K_INSN_REL_26: + case R_OR1K_HI_16_IN_INSN: + case R_OR1K_LO_16_IN_INSN: + case R_OR1K_32: + /* R_OR1K_16? */ + { + if (h != NULL && !info->shared) + { + /* We may need a copy reloc. */ + h->non_got_ref = 1; + + /* We may also need a .plt entry. */ + h->plt.refcount += 1; + if (ELF32_R_TYPE (rel->r_info) != R_OR1K_INSN_REL_26) + h->pointer_equality_needed = 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_OR1K_INSN_REL_26 + || (h != NULL + && (! info->symbolic + || h->root.type == bfd_link_hash_defweak + || !h->def_regular)))) + || (!info->shared + && (sec->flags & SEC_ALLOC) != 0 + && h != NULL + && (h->root.type == bfd_link_hash_defweak + || !h->def_regular))) + { + struct elf_or1k_dyn_relocs *p; + struct elf_or1k_dyn_relocs **head; + + /* When creating a shared object, we must copy these + relocs into the output file. We create a reloc + section in dynobj and make room for the reloc. */ + if (sreloc == NULL) + { + const char *name; + unsigned int strndx = elf_elfheader (abfd)->e_shstrndx; + unsigned int shnam = _bfd_elf_single_rel_hdr (sec)->sh_name; + + name = bfd_elf_string_from_elf_section (abfd, strndx, shnam); + if (name == NULL) + return FALSE; + + if (strncmp (name, ".rela", 5) != 0 + || strcmp (bfd_get_section_name (abfd, sec), + name + 5) != 0) + { + (*_bfd_error_handler) + (_("%B: bad relocation section name `%s\'"), + abfd, name); + } + + if (htab->root.dynobj == NULL) + htab->root.dynobj = abfd; + dynobj = htab->root.dynobj; + + sreloc = bfd_get_section_by_name (dynobj, name); + if (sreloc == NULL) + { + sreloc = _bfd_elf_make_dynamic_reloc_section + (sec, dynobj, 2, abfd, /*rela?*/ TRUE); + + if (sreloc == NULL) + return FALSE; + } + elf_section_data (sec)->sreloc = sreloc; + } + + /* If this is a global symbol, we count the number of + relocations we need for this symbol. */ + if (h != NULL) + head = &((struct elf_or1k_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; + Elf_Internal_Sym *isym; + void *vpp; + + isym = bfd_sym_from_r_symndx (&htab->sym_sec, + abfd, r_symndx); + if (isym == NULL) + return FALSE; + + s = bfd_section_from_elf_index (abfd, isym->st_shndx); + if (s == NULL) + return FALSE; + + vpp = &elf_section_data (s)->local_dynrel; + head = (struct elf_or1k_dyn_relocs **) vpp; + } + + p = *head; + if (p == NULL || p->sec != sec) + { + bfd_size_type amt = sizeof *p; + p = ((struct elf_or1k_dyn_relocs *) + bfd_alloc (htab->root.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_OR1K_INSN_REL_26) + p->pc_count += 1; + } + } + break; + } + } + + return TRUE; +} + +/* Finish up the dynamic sections. */ + +static bfd_boolean +or1k_elf_finish_dynamic_sections (bfd *output_bfd, + struct bfd_link_info *info) +{ + bfd *dynobj; + asection *sdyn, *sgot; + struct elf_or1k_link_hash_table *htab; + + htab = or1k_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + dynobj = htab->root.dynobj; + + sgot = htab->sgotplt; + sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); + + if (htab->root.dynamic_sections_created) + { + asection *splt; + Elf32_External_Dyn *dyncon, *dynconend; + + BFD_ASSERT (sgot != NULL && sdyn != NULL); + + 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: + s = htab->sgot->output_section; + BFD_ASSERT (s != NULL); + dyn.d_un.d_ptr = s->vma; + break; + + case DT_JMPREL: + s = htab->srelplt->output_section; + BFD_ASSERT (s != NULL); + dyn.d_un.d_ptr = s->vma; + break; + + case DT_PLTRELSZ: + s = htab->srelplt->output_section; + BFD_ASSERT (s != NULL); + dyn.d_un.d_val = s->size; + break; + + case DT_RELASZ: + /* My reading of the SVR4 ABI indicates that the + procedure linkage table relocs (DT_JMPREL) should be + included in the overall relocs (DT_RELA). This is + what Solaris does. However, UnixWare can not handle + that case. Therefore, we override the DT_RELASZ entry + here to make it not include the JMPREL relocs. Since + the linker script arranges for .rela.plt to follow all + other relocation sections, we don't have to worry + about changing the DT_RELA entry. */ + if (htab->srelplt != NULL) + { + /* FIXME: this calculation sometimes produces + wrong result, the problem is that the dyn.d_un.d_val + is not always correct, needs investigation why + that happens. In the meantime, reading the + ".rela.dyn" section by name seems to yield + correct result. + + s = htab->srelplt->output_section; + dyn.d_un.d_val -= s->size; + */ + + s = bfd_get_section_by_name (output_bfd, ".rela.dyn"); + dyn.d_un.d_val = s ? s->size : 0; + } + break; + } + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + } + + + /* Fill in the first entry in the procedure linkage table. */ + splt = htab->splt; + if (splt && splt->size > 0) + { + if (info->shared) + { + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, + splt->contents); + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, + splt->contents + 4); + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, + splt->contents + 8); + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, + splt->contents + 12); + bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, + splt->contents + 16); + } + else + { + unsigned long addr; + /* addr = .got + 4 */ + addr = sgot->output_section->vma + sgot->output_offset + 4; + bfd_put_32 (output_bfd, + PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), + splt->contents); + bfd_put_32 (output_bfd, + PLT0_ENTRY_WORD1 | (addr & 0xffff), + splt->contents + 4); + bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); + bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); + bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); + } + + elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; + } + } + + /* Set the first entry in the global offset table to the address of + the dynamic section. */ + if (sgot && sgot->size > 0) + { + if (sdyn == NULL) + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); + else + bfd_put_32 (output_bfd, + sdyn->output_section->vma + sdyn->output_offset, + sgot->contents); + elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; + } + + if (htab->sgot && htab->sgot->size > 0) + elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4; + + return TRUE; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static bfd_boolean +or1k_elf_finish_dynamic_symbol (bfd *output_bfd, + struct bfd_link_info *info, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + struct elf_or1k_link_hash_table *htab; + bfd_byte *loc; + + htab = or1k_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + if (h->plt.offset != (bfd_vma) -1) + { + asection *splt; + asection *sgot; + asection *srela; + + bfd_vma plt_index; + bfd_vma got_offset; + bfd_vma got_addr; + Elf_Internal_Rela rela; + + /* This symbol has an entry in the procedure linkage table. Set + it up. */ + BFD_ASSERT (h->dynindx != -1); + + splt = htab->splt; + sgot = htab->sgotplt; + srela = htab->srelplt; + BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); + + /* Get the index in the procedure linkage table which + corresponds to this symbol. This is the index of this symbol + in all the symbols for which we are making plt entries. The + first entry in the procedure linkage table is reserved. */ + plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; + + /* Get the offset into the .got table of the entry that + corresponds to this function. Each .got entry is 4 bytes. + The first three are reserved. */ + got_offset = (plt_index + 3) * 4; + got_addr = got_offset; + + /* Fill in the entry in the procedure linkage table. */ + if (! info->shared) + { + got_addr += htab->sgotplt->output_section->vma + + htab->sgotplt->output_offset; + bfd_put_32 (output_bfd, PLT_ENTRY_WORD0 | ((got_addr >> 16) & 0xffff), + splt->contents + h->plt.offset); + bfd_put_32 (output_bfd, PLT_ENTRY_WORD1 | (got_addr & 0xffff), + splt->contents + h->plt.offset + 4); + bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, + splt->contents + h->plt.offset + 8); + bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, + splt->contents + h->plt.offset + 12); + bfd_put_32 (output_bfd, PLT_ENTRY_WORD4 + | plt_index * sizeof (Elf32_External_Rela), + splt->contents + h->plt.offset + 16); + } + else + { + bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD0 | (got_addr & 0xffff), + splt->contents + h->plt.offset); + bfd_put_32 (output_bfd, PLT_PIC_ENTRY_WORD1 + | plt_index * sizeof (Elf32_External_Rela), + splt->contents + h->plt.offset + 4); + bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2, + splt->contents + h->plt.offset + 8); + bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3, + splt->contents + h->plt.offset + 12); + bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4, + splt->contents + h->plt.offset + 16); + } + + /* Fill in the entry in the global offset table. */ + bfd_put_32 (output_bfd, + (splt->output_section->vma + + splt->output_offset), /* Same offset. */ + sgot->contents + got_offset); + + /* Fill in the entry in the .rela.plt section. */ + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + got_offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_JMP_SLOT); + rela.r_addend = 0; + loc = srela->contents; + loc += 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. */ + sym->st_shndx = SHN_UNDEF; + } + + } + + if (h->got.offset != (bfd_vma) -1 + && (h->got.offset & 2) == 0) /* Homemade TLS check. */ + { + asection *sgot; + asection *srela; + Elf_Internal_Rela rela; + + /* This symbol has an entry in the global offset table. Set it + up. */ + sgot = htab->sgot; + srela = htab->srelgot; + BFD_ASSERT (sgot != NULL && srela != NULL); + + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + (h->got.offset &~ 1)); + + /* If this is a -Bsymbolic link, and the symbol is defined + locally, we just want to emit a RELATIVE reloc. Likewise if + the symbol was forced to be local because of a version file. + The entry in the global offset table will already have been + initialized in the relocate_section function. */ + if (info->shared + && (info->symbolic + || h->dynindx == -1 + || h->forced_local) + && h->def_regular) + { + rela.r_info = ELF32_R_INFO (0, R_OR1K_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); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_OR1K_GLOB_DAT); + rela.r_addend = 0; + } + + loc = srela->contents; + loc += srela->reloc_count * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + ++srela->reloc_count; + } + + if (h->needs_copy) + { + asection *s; + Elf_Internal_Rela rela; + + /* This symbols needs a copy reloc. Set it up. */ + BFD_ASSERT (h->dynindx != -1 + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)); + + s = bfd_get_section_by_name (h->root.u.def.section->owner, + ".rela.bss"); + BFD_ASSERT (s != NULL); + + 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_OR1K_COPY); + rela.r_addend = 0; + loc = s->contents; + loc += s->reloc_count * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); + ++s->reloc_count; + } + + /* Mark some specially defined symbols as absolute. */ + if (strcmp (h->root.root.string, "_DYNAMIC") == 0 + || h == htab->root.hgot) + sym->st_shndx = SHN_ABS; + + return TRUE; +} + +static enum elf_reloc_type_class +or1k_elf_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_OR1K_RELATIVE: return reloc_class_relative; + case R_OR1K_JMP_SLOT: return reloc_class_plt; + case R_OR1K_COPY: return reloc_class_copy; + default: return reloc_class_normal; + } +} + +/* 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 +or1k_elf_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) +{ + struct elf_or1k_link_hash_table *htab; + struct elf_or1k_link_hash_entry *eh; + struct elf_or1k_dyn_relocs *p; + bfd *dynobj; + asection *s; + + dynobj = elf_hash_table (info)->dynobj; + + /* Make sure we know what is going on here. */ + BFD_ASSERT (dynobj != NULL + && (h->needs_plt + || h->u.weakdef != NULL + || (h->def_dynamic + && h->ref_regular + && !h->def_regular))); + + /* If this is a function, put it in the procedure linkage table. We + will fill in the contents of the procedure linkage table later, + when we know the address of the .got section. */ + if (h->type == STT_FUNC + || h->needs_plt) + { + if (! info->shared + && !h->def_dynamic + && !h->ref_dynamic + && h->root.type != bfd_link_hash_undefweak + && h->root.type != bfd_link_hash_undefined) + { + /* This case can occur if we saw a PLT reloc in an input + file, but the symbol was never referred to by a dynamic + object. In such a case, we don't actually need to build + a procedure linkage table, and we can just do a PCREL + reloc instead. */ + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + + return TRUE; + } + else + 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; + 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; + } + + eh = (struct elf_or1k_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 | SEC_HAS_CONTENTS)) != 0) + break; + } + + /* If we didn't find any dynamic relocs in sections which needs the + copy reloc, 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 = or1k_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + s = htab->sdynbss; + BFD_ASSERT (s != NULL); + + /* We must generate a R_OR1K_COPY reloc to tell the dynamic linker + to copy the initial value out of the dynamic object and into the + runtime process image. We need to remember the offset into the + .rela.bss section we are going to use. */ + if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) + { + asection *srel; + + srel = htab->srelbss; + BFD_ASSERT (srel != NULL); + srel->size += sizeof (Elf32_External_Rela); + h->needs_copy = 1; + } + + 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_or1k_link_hash_table *htab; + struct elf_or1k_link_hash_entry *eh; + struct elf_or1k_dyn_relocs *p; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + info = (struct bfd_link_info *) inf; + htab = or1k_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + eh = (struct elf_or1k_link_hash_entry *) h; + + if (htab->root.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 (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) + { + asection *s = htab->splt; + + /* If this is the first .plt entry, make room for the special + first entry. */ + if (s->size == 0) + s->size = PLT_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->sgotplt->size += 4; + + /* We also need to make an entry in the .rel.plt section. */ + htab->srelplt->size += sizeof (Elf32_External_Rela); + } + else + { + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + } + else + { + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + + if (h->got.refcount > 0) + { + asection *s; + bfd_boolean dyn; + unsigned char 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->sgot; + + h->got.offset = s->size; + + tls_type = ((struct elf_or1k_link_hash_entry *) h)->tls_type; + + /* TLS GD requires two GOT and two relocs. */ + if (tls_type == TLS_GD) + s->size += 8; + else + s->size += 4; + dyn = htab->root.dynamic_sections_created; + if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) + { + if (tls_type == TLS_GD) + htab->srelgot->size += 2 * sizeof (Elf32_External_Rela); + else + htab->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 (h->def_regular + && (h->forced_local + || info->symbolic)) + { + struct elf_or1k_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 + { + /* 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->root.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_or1k_link_hash_entry *eh; + struct elf_or1k_dyn_relocs *p; + + eh = (struct elf_or1k_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 +or1k_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + struct elf_or1k_link_hash_table *htab; + bfd *dynobj; + asection *s; + bfd_boolean relocs; + bfd *ibfd; + + htab = or1k_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + dynobj = htab->root.dynobj; + BFD_ASSERT (dynobj != NULL); + + if (htab->root.dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (info->executable) + { + s = bfd_get_section_by_name (dynobj, ".interp"); + BFD_ASSERT (s != NULL); + 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; + bfd_size_type locsymcount; + Elf_Internal_Shdr *symtab_hdr; + unsigned char *local_tls_type; + asection *srel; + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) + continue; + + for (s = ibfd->sections; s != NULL; s = s->next) + { + struct elf_or1k_dyn_relocs *p; + + for (p = ((struct elf_or1k_dyn_relocs *) + 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) + { + srel = elf_section_data (p->sec)->sreloc; + srel->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_tdata (ibfd)->symtab_hdr; + locsymcount = symtab_hdr->sh_info; + end_local_got = local_got + locsymcount; + s = htab->sgot; + srel = htab->srelgot; + local_tls_type = (unsigned char *) elf_or1k_local_tls_type (ibfd); + for (; local_got < end_local_got; ++local_got) + { + if (*local_got > 0) + { + *local_got = s->size; + + /* TLS GD requires two GOT and two relocs. */ + if (local_tls_type != NULL && *local_tls_type == TLS_GD) + s->size += 8; + else + s->size += 4; + if (info->shared) + { + if (local_tls_type != NULL && *local_tls_type == TLS_GD) + srel->size += 2 * sizeof (Elf32_External_Rela); + else + srel->size += sizeof (Elf32_External_Rela); + } + } + else + + *local_got = (bfd_vma) -1; + + if (local_tls_type) + ++local_tls_type; + } + } + + /* Allocate global sym .plt and .got entries, and space for global + sym dynamic relocs. */ + elf_link_hash_traverse (&htab->root, 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->splt + || s == htab->sgot + || s == htab->sgotplt + || s == htab->sdynbss) + { + /* 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 && s != htab->srelplt) + relocs = TRUE; + + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + s->reloc_count = 0; + } + else + /* It's not one of our sections, so don't allocate space. */ + continue; + + if (s->size == 0) + { + /* If we don't need this section, strip it from the + output file. This is mostly to handle .rela.bss and + .rela.plt. We must create both sections in + create_dynamic_sections, because they 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_OR1K_NONE reloc instead + of garbage. */ + s->contents = bfd_zalloc (dynobj, s->size); + + if (s->contents == NULL) + return FALSE; + } + + if (htab->root.dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in or1k_elf_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->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->root, readonly_dynrelocs, + info); + + if ((info->flags & DF_TEXTREL) != 0) + { + if (! add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; + } + } + } + +#undef add_dynamic_entry + return TRUE; +} + +/* Create dynamic sections when linking against a dynamic object. */ + +static bfd_boolean +or1k_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) +{ + struct elf_or1k_link_hash_table *htab; + + htab = or1k_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + if (!htab->sgot && !create_got_section (dynobj, info)) + return FALSE; + + if (!_bfd_elf_create_dynamic_sections (dynobj, info)) + return FALSE; + + htab->splt = bfd_get_section_by_name (dynobj, ".plt"); + htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); + htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); + if (!info->shared) + htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); + + if (!htab->splt || !htab->srelplt || !htab->sdynbss + || (!info->shared && !htab->srelbss)) + abort (); + + return TRUE; +} + +/* Copy the extra info we tack onto an elf_link_hash_entry. */ + +static void +or1k_elf_copy_indirect_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct elf_or1k_link_hash_entry * edir; + struct elf_or1k_link_hash_entry * eind; + + edir = (struct elf_or1k_link_hash_entry *) dir; + eind = (struct elf_or1k_link_hash_entry *) ind; + + if (eind->dyn_relocs != NULL) + { + if (edir->dyn_relocs != NULL) + { + struct elf_or1k_dyn_relocs **pp; + struct elf_or1k_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_or1k_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) + { + if (dir->got.refcount <= 0) + { + edir->tls_type = eind->tls_type; + eind->tls_type = TLS_UNKNOWN; + } + } + + _bfd_elf_link_hash_copy_indirect (info, dir, ind); +} + +/* Set the right machine number. */ + +static bfd_boolean +or1k_elf_object_p (bfd *abfd) +{ + unsigned long mach = bfd_mach_or1k; + + if (elf_elfheader (abfd)->e_flags & EF_OR1K_NODELAY) + mach = bfd_mach_or1knd; + + return bfd_default_set_arch_mach (abfd, bfd_arch_or1k, mach); +} + +/* Store the machine number in the flags field. */ + +static void +or1k_elf_final_write_processing (bfd *abfd, + bfd_boolean linker ATTRIBUTE_UNUSED) +{ + switch (bfd_get_mach (abfd)) + { + default: + case bfd_mach_or1k: + break; + case bfd_mach_or1knd: + elf_elfheader (abfd)->e_flags |= EF_OR1K_NODELAY; + break; + } +} + +static bfd_boolean +or1k_elf_set_private_flags (bfd *abfd, flagword flags) +{ + BFD_ASSERT (!elf_flags_init (abfd) + || elf_elfheader (abfd)->e_flags == flags); + + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = TRUE; + return TRUE; +} + +/* Make sure all input files are consistent with respect to + EF_OR1K_NODELAY flag setting. */ + +static bfd_boolean +elf32_or1k_merge_private_bfd_data (bfd *ibfd, bfd *obfd) +{ + flagword out_flags; + flagword in_flags; + + in_flags = elf_elfheader (ibfd)->e_flags; + out_flags = elf_elfheader (obfd)->e_flags; + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return TRUE; + + if (!elf_flags_init (obfd)) + { + elf_flags_init (obfd) = TRUE; + elf_elfheader (obfd)->e_flags = in_flags; + + return TRUE; + } + + if (in_flags == out_flags) + return TRUE; + + if ((in_flags & EF_OR1K_NODELAY) != (out_flags & EF_OR1K_NODELAY)) + { + (*_bfd_error_handler) + (_("%B: EF_OR1K_NODELAY flag mismatch with previous modules"), ibfd); + + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + return TRUE; + +} + +#define ELF_ARCH bfd_arch_or1k +#define ELF_MACHINE_CODE EM_OR1K +#define ELF_TARGET_ID OR1K_ELF_DATA +#define ELF_MAXPAGESIZE 0x2000 + +#define TARGET_BIG_SYM bfd_elf32_or1k_vec +#define TARGET_BIG_NAME "elf32-or1k" + +#define elf_info_to_howto_rel NULL +#define elf_info_to_howto or1k_info_to_howto_rela +#define elf_backend_relocate_section or1k_elf_relocate_section +#define elf_backend_gc_mark_hook or1k_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook or1k_elf_gc_sweep_hook +#define elf_backend_check_relocs or1k_elf_check_relocs +#define elf_backend_reloc_type_class or1k_elf_reloc_type_class +#define elf_backend_can_gc_sections 1 +#define elf_backend_rela_normal 1 + +#define bfd_elf32_mkobject elf_or1k_mkobject + +#define bfd_elf32_bfd_merge_private_bfd_data elf32_or1k_merge_private_bfd_data +#define bfd_elf32_bfd_set_private_flags or1k_elf_set_private_flags +#define bfd_elf32_bfd_reloc_type_lookup or1k_reloc_type_lookup +#define bfd_elf32_bfd_reloc_name_lookup or1k_reloc_name_lookup + +#define elf_backend_object_p or1k_elf_object_p +#define elf_backend_final_write_processing or1k_elf_final_write_processing +#define elf_backend_can_refcount 1 + +#define elf_backend_plt_readonly 1 +#define elf_backend_want_got_plt 1 +#define elf_backend_want_plt_sym 0 +#define elf_backend_got_header_size 12 +#define bfd_elf32_bfd_link_hash_table_create or1k_elf_link_hash_table_create +#define elf_backend_copy_indirect_symbol or1k_elf_copy_indirect_symbol +#define elf_backend_create_dynamic_sections or1k_elf_create_dynamic_sections +#define elf_backend_finish_dynamic_sections or1k_elf_finish_dynamic_sections +#define elf_backend_size_dynamic_sections or1k_elf_size_dynamic_sections +#define elf_backend_adjust_dynamic_symbol or1k_elf_adjust_dynamic_symbol +#define elf_backend_finish_dynamic_symbol or1k_elf_finish_dynamic_symbol + +#include "elf32-target.h" |