| /* 32-bit ELF support for Nios II. |
| Copyright (C) 2012-2023 Free Software Foundation, Inc. |
| Contributed by Nigel Gray (ngray@altera.com). |
| Contributed by Mentor Graphics, Inc. |
| |
| 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. */ |
| |
| /* This file handles Altera Nios II ELF targets. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| #include "bfdlink.h" |
| #include "genlink.h" |
| #include "elf-bfd.h" |
| #include "elf/nios2.h" |
| #include "opcode/nios2.h" |
| #include "elf32-nios2.h" |
| #include "libiberty.h" |
| |
| /* Use RELA relocations. */ |
| #ifndef USE_RELA |
| #define USE_RELA |
| #endif |
| |
| #ifdef USE_REL |
| #undef USE_REL |
| #endif |
| |
| /* Forward declarations. */ |
| static bfd_reloc_status_type nios2_elf32_ignore_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_hi16_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_lo16_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_hiadj16_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_pcrel16_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_call26_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_gprel_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_ujmp_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_cjmp_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bfd_reloc_status_type nios2_elf32_callr_relocate |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| |
| /* Target vector. */ |
| extern const bfd_target nios2_elf32_le_vec; |
| extern const bfd_target nios2_elf32_be_vec; |
| |
| /* Offset of tp and dtp pointers from start of TLS block. */ |
| #define TP_OFFSET 0x7000 |
| #define DTP_OFFSET 0x8000 |
| |
| /* The relocation tables used for SHT_REL sections. There are separate |
| tables for R1 and R2 encodings. */ |
| static reloc_howto_type elf_nios2_r1_howto_table_rel[] = { |
| /* No relocation. */ |
| HOWTO (R_NIOS2_NONE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_NIOS2_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16-bit signed immediate relocation. */ |
| HOWTO (R_NIOS2_S16, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 6, /* bitpos */ |
| complain_overflow_signed, /* complain on overflow */ |
| bfd_elf_generic_reloc, /* special function */ |
| "R_NIOS2_S16", /* name */ |
| false, /* partial_inplace */ |
| 0x003fffc0, /* src_mask */ |
| 0x003fffc0, /* dest_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16-bit unsigned immediate relocation. */ |
| HOWTO (R_NIOS2_U16, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 6, /* bitpos */ |
| complain_overflow_unsigned, /* complain on overflow */ |
| bfd_elf_generic_reloc, /* special function */ |
| "R_NIOS2_U16", /* name */ |
| false, /* partial_inplace */ |
| 0x003fffc0, /* src_mask */ |
| 0x003fffc0, /* dest_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_NIOS2_PCREL16, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 16, /* bitsize */ |
| true, /* pc_relative */ |
| 6, /* bitpos */ |
| complain_overflow_signed, /* complain on overflow */ |
| nios2_elf32_pcrel16_relocate, /* special function */ |
| "R_NIOS2_PCREL16", /* name */ |
| false, /* partial_inplace */ |
| 0x003fffc0, /* src_mask */ |
| 0x003fffc0, /* dest_mask */ |
| true), /* pcrel_offset */ |
| |
| HOWTO (R_NIOS2_CALL26, /* type */ |
| 2, /* rightshift */ |
| 4, /* size */ |
| 26, /* bitsize */ |
| false, /* pc_relative */ |
| 6, /* bitpos */ |
| complain_overflow_dont, /* complain on overflow */ |
| nios2_elf32_call26_relocate, /* special function */ |
| "R_NIOS2_CALL26", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffc0, /* src_mask */ |
| 0xffffffc0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_NIOS2_IMM5, |
| 0, |
| 4, |
| 5, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_IMM5", |
| false, |
| 0x000007c0, |
| 0x000007c0, |
| false), |
| |
| HOWTO (R_NIOS2_CACHE_OPX, |
| 0, |
| 4, |
| 5, |
| false, |
| 22, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_CACHE_OPX", |
| false, |
| 0x07c00000, |
| 0x07c00000, |
| false), |
| |
| HOWTO (R_NIOS2_IMM6, |
| 0, |
| 4, |
| 6, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_IMM6", |
| false, |
| 0x00000fc0, |
| 0x00000fc0, |
| false), |
| |
| HOWTO (R_NIOS2_IMM8, |
| 0, |
| 4, |
| 8, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_IMM8", |
| false, |
| 0x00003fc0, |
| 0x00003fc0, |
| false), |
| |
| HOWTO (R_NIOS2_HI16, |
| 0, |
| 4, |
| 32, |
| false, |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_hi16_relocate, |
| "R_NIOS2_HI16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_LO16, |
| 0, |
| 4, |
| 32, |
| false, |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_lo16_relocate, |
| "R_NIOS2_LO16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_HIADJ16, |
| 0, |
| 4, |
| 32, |
| false, |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_hiadj16_relocate, |
| "R_NIOS2_HIADJ16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_BFD_RELOC_32, |
| 0, |
| 4, /* long */ |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_BFD_RELOC32", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_BFD_RELOC_16, |
| 0, |
| 2, /* short */ |
| 16, |
| false, |
| 0, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_BFD_RELOC16", |
| false, |
| 0x0000ffff, |
| 0x0000ffff, |
| false), |
| |
| HOWTO (R_NIOS2_BFD_RELOC_8, |
| 0, |
| 1, /* byte */ |
| 8, |
| false, |
| 0, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_BFD_RELOC8", |
| false, |
| 0x000000ff, |
| 0x000000ff, |
| false), |
| |
| HOWTO (R_NIOS2_GPREL, |
| 0, |
| 4, |
| 32, |
| false, |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_gprel_relocate, |
| "R_NIOS2_GPREL", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_GNU_VTINHERIT, |
| 0, |
| 4, |
| 0, |
| false, |
| 0, |
| complain_overflow_dont, |
| NULL, |
| "R_NIOS2_GNU_VTINHERIT", |
| false, |
| 0, |
| 0, |
| false), |
| |
| HOWTO (R_NIOS2_GNU_VTENTRY, |
| 0, |
| 4, |
| 0, |
| false, |
| 0, |
| complain_overflow_dont, |
| _bfd_elf_rel_vtable_reloc_fn, |
| "R_NIOS2_GNU_VTENTRY", |
| false, |
| 0, |
| 0, |
| false), |
| |
| HOWTO (R_NIOS2_UJMP, |
| 0, |
| 4, |
| 32, |
| false, |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_ujmp_relocate, |
| "R_NIOS2_UJMP", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_CJMP, |
| 0, |
| 4, |
| 32, |
| false, |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_cjmp_relocate, |
| "R_NIOS2_CJMP", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_CALLR, |
| 0, |
| 4, |
| 32, |
| false, |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_callr_relocate, |
| "R_NIOS2_CALLR", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_ALIGN, |
| 0, |
| 4, |
| 0, |
| false, |
| 0, |
| complain_overflow_dont, |
| nios2_elf32_ignore_reloc, |
| "R_NIOS2_ALIGN", |
| false, |
| 0, |
| 0, |
| true), |
| |
| |
| HOWTO (R_NIOS2_GOT16, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOT16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_CALL16, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_CALL16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_GOTOFF_LO, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOTOFF_LO", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_GOTOFF_HA, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOTOFF_HA", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_PCREL_LO, |
| 0, |
| 4, |
| 16, |
| true, |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_pcrel_lo16_relocate, |
| "R_NIOS2_PCREL_LO", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| true), |
| |
| HOWTO (R_NIOS2_PCREL_HA, |
| 0, |
| 4, |
| 16, |
| false, /* This is a PC-relative relocation, but we need to subtract |
| PC ourselves before the HIADJ. */ |
| 6, |
| complain_overflow_dont, |
| nios2_elf32_pcrel_hiadj16_relocate, |
| "R_NIOS2_PCREL_HA", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| true), |
| |
| HOWTO (R_NIOS2_TLS_GD16, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_GD16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_LDM16, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_LDM16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_LDO16, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_LDO16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_IE16, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_IE16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_LE16, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_LE16", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_DTPMOD, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_DTPMOD", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_DTPREL, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_DTPREL", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_TPREL, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_TPREL", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_COPY, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_COPY", |
| false, |
| 0, |
| 0, |
| false), |
| |
| HOWTO (R_NIOS2_GLOB_DAT, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GLOB_DAT", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_JUMP_SLOT, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_JUMP_SLOT", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_RELATIVE, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_RELATIVE", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_GOTOFF, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOTOFF", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_CALL26_NOAT, /* type */ |
| 2, /* rightshift */ |
| 4, /* size */ |
| 26, /* bitsize */ |
| false, /* pc_relative */ |
| 6, /* bitpos */ |
| complain_overflow_dont, /* complain on overflow */ |
| nios2_elf32_call26_relocate, /* special function */ |
| "R_NIOS2_CALL26_NOAT", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffc0, /* src_mask */ |
| 0xffffffc0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_NIOS2_GOT_LO, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOT_LO", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_GOT_HA, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOT_HA", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_CALL_LO, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_CALL_LO", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| HOWTO (R_NIOS2_CALL_HA, |
| 0, |
| 4, |
| 16, |
| false, |
| 6, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_CALL_HA", |
| false, |
| 0x003fffc0, |
| 0x003fffc0, |
| false), |
| |
| /* Add other relocations here. */ |
| }; |
| |
| static reloc_howto_type elf_nios2_r2_howto_table_rel[] = { |
| /* No relocation. */ |
| HOWTO (R_NIOS2_NONE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_NIOS2_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16-bit signed immediate relocation. */ |
| HOWTO (R_NIOS2_S16, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 16, /* bitpos */ |
| complain_overflow_signed, /* complain on overflow */ |
| bfd_elf_generic_reloc, /* special function */ |
| "R_NIOS2_S16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff0000, /* src_mask */ |
| 0xffff0000, /* dest_mask */ |
| false), /* pcrel_offset */ |
| |
| /* 16-bit unsigned immediate relocation. */ |
| HOWTO (R_NIOS2_U16, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 16, /* bitpos */ |
| complain_overflow_unsigned, /* complain on overflow */ |
| bfd_elf_generic_reloc, /* special function */ |
| "R_NIOS2_U16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff0000, /* src_mask */ |
| 0xffff0000, /* dest_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_NIOS2_PCREL16, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 16, /* bitsize */ |
| true, /* pc_relative */ |
| 16, /* bitpos */ |
| complain_overflow_signed, /* complain on overflow */ |
| nios2_elf32_pcrel16_relocate, /* special function */ |
| "R_NIOS2_PCREL16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff0000, /* src_mask */ |
| 0xffff0000, /* dest_mask */ |
| true), /* pcrel_offset */ |
| |
| HOWTO (R_NIOS2_CALL26, /* type */ |
| 2, /* rightshift */ |
| 4, /* size */ |
| 26, /* bitsize */ |
| false, /* pc_relative */ |
| 6, /* bitpos */ |
| complain_overflow_dont, /* complain on overflow */ |
| nios2_elf32_call26_relocate, /* special function */ |
| "R_NIOS2_CALL26", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffc0, /* src_mask */ |
| 0xffffffc0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_NIOS2_IMM5, |
| 0, |
| 4, |
| 5, |
| false, |
| 21, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_IMM5", |
| false, |
| 0x03e00000, |
| 0x03e00000, |
| false), |
| |
| HOWTO (R_NIOS2_CACHE_OPX, |
| 0, |
| 4, |
| 5, |
| false, |
| 11, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_CACHE_OPX", |
| false, |
| 0x0000f800, |
| 0x0000f800, |
| false), |
| |
| HOWTO (R_NIOS2_IMM6, |
| 0, |
| 4, |
| 6, |
| false, |
| 26, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_IMM6", |
| false, |
| 0xfc000000, |
| 0xfc000000, |
| false), |
| |
| HOWTO (R_NIOS2_IMM8, |
| 0, |
| 4, |
| 8, |
| false, |
| 24, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_IMM8", |
| false, |
| 0xff000000, |
| 0xff000000, |
| false), |
| |
| HOWTO (R_NIOS2_HI16, |
| 0, |
| 4, |
| 32, |
| false, |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_hi16_relocate, |
| "R_NIOS2_HI16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_LO16, |
| 0, |
| 4, |
| 32, |
| false, |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_lo16_relocate, |
| "R_NIOS2_LO16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_HIADJ16, |
| 0, |
| 4, |
| 32, |
| false, |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_hiadj16_relocate, |
| "R_NIOS2_HIADJ16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_BFD_RELOC_32, |
| 0, |
| 4, /* long */ |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_BFD_RELOC32", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_BFD_RELOC_16, |
| 0, |
| 2, /* short */ |
| 16, |
| false, |
| 0, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_BFD_RELOC16", |
| false, |
| 0x0000ffff, |
| 0x0000ffff, |
| false), |
| |
| HOWTO (R_NIOS2_BFD_RELOC_8, |
| 0, |
| 1, /* byte */ |
| 8, |
| false, |
| 0, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_BFD_RELOC8", |
| false, |
| 0x000000ff, |
| 0x000000ff, |
| false), |
| |
| HOWTO (R_NIOS2_GPREL, |
| 0, |
| 4, |
| 32, |
| false, |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_gprel_relocate, |
| "R_NIOS2_GPREL", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_GNU_VTINHERIT, |
| 0, |
| 4, |
| 0, |
| false, |
| 0, |
| complain_overflow_dont, |
| NULL, |
| "R_NIOS2_GNU_VTINHERIT", |
| false, |
| 0, |
| 0, |
| false), |
| |
| HOWTO (R_NIOS2_GNU_VTENTRY, |
| 0, |
| 4, |
| 0, |
| false, |
| 0, |
| complain_overflow_dont, |
| _bfd_elf_rel_vtable_reloc_fn, |
| "R_NIOS2_GNU_VTENTRY", |
| false, |
| 0, |
| 0, |
| false), |
| |
| HOWTO (R_NIOS2_UJMP, |
| 0, |
| 4, |
| 32, |
| false, |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_ujmp_relocate, |
| "R_NIOS2_UJMP", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_CJMP, |
| 0, |
| 4, |
| 32, |
| false, |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_cjmp_relocate, |
| "R_NIOS2_CJMP", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_CALLR, |
| 0, |
| 4, |
| 32, |
| false, |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_callr_relocate, |
| "R_NIOS2_CALLR", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_ALIGN, |
| 0, |
| 4, |
| 0, |
| false, |
| 0, |
| complain_overflow_dont, |
| nios2_elf32_ignore_reloc, |
| "R_NIOS2_ALIGN", |
| false, |
| 0, |
| 0, |
| true), |
| |
| HOWTO (R_NIOS2_GOT16, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOT16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_CALL16, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_CALL16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_GOTOFF_LO, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOTOFF_LO", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_GOTOFF_HA, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOTOFF_HA", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_PCREL_LO, |
| 0, |
| 4, |
| 16, |
| true, |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_pcrel_lo16_relocate, |
| "R_NIOS2_PCREL_LO", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| true), |
| |
| HOWTO (R_NIOS2_PCREL_HA, |
| 0, |
| 4, |
| 16, |
| false, /* This is a PC-relative relocation, but we need to subtract |
| PC ourselves before the HIADJ. */ |
| 16, |
| complain_overflow_dont, |
| nios2_elf32_pcrel_hiadj16_relocate, |
| "R_NIOS2_PCREL_HA", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| true), |
| |
| HOWTO (R_NIOS2_TLS_GD16, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_GD16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_LDM16, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_LDM16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_LDO16, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_LDO16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_IE16, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_IE16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_LE16, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_bitfield, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_LE16", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_DTPMOD, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_DTPMOD", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_DTPREL, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_DTPREL", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_TLS_TPREL, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_TLS_TPREL", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_COPY, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_COPY", |
| false, |
| 0, |
| 0, |
| false), |
| |
| HOWTO (R_NIOS2_GLOB_DAT, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GLOB_DAT", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_JUMP_SLOT, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_JUMP_SLOT", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_RELATIVE, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_RELATIVE", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_GOTOFF, |
| 0, |
| 4, |
| 32, |
| false, |
| 0, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOTOFF", |
| false, |
| 0xffffffff, |
| 0xffffffff, |
| false), |
| |
| HOWTO (R_NIOS2_CALL26_NOAT, /* type */ |
| 2, /* rightshift */ |
| 4, /* size */ |
| 26, /* bitsize */ |
| false, /* pc_relative */ |
| 6, /* bitpos */ |
| complain_overflow_dont, /* complain on overflow */ |
| nios2_elf32_call26_relocate, /* special function */ |
| "R_NIOS2_CALL26_NOAT", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffc0, /* src_mask */ |
| 0xffffffc0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_NIOS2_GOT_LO, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOT_LO", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_GOT_HA, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_GOT_HA", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_CALL_LO, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_CALL_LO", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_CALL_HA, |
| 0, |
| 4, |
| 16, |
| false, |
| 16, |
| complain_overflow_dont, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_CALL_HA", |
| false, |
| 0xffff0000, |
| 0xffff0000, |
| false), |
| |
| HOWTO (R_NIOS2_R2_S12, |
| 0, |
| 4, |
| 12, |
| false, |
| 16, |
| complain_overflow_signed, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_S12", |
| false, |
| 0x0fff0000, |
| 0x0fff0000, |
| false), |
| |
| HOWTO (R_NIOS2_R2_I10_1_PCREL, |
| 1, |
| 2, |
| 10, |
| true, |
| 6, |
| complain_overflow_signed, |
| bfd_elf_generic_reloc, /* FIXME? */ |
| "R_NIOS2_R2_I10_1_PCREL", |
| false, |
| 0xffc0, |
| 0xffc0, |
| true), |
| |
| HOWTO (R_NIOS2_R2_T1I7_1_PCREL, |
| 1, |
| 2, |
| 7, |
| true, |
| 9, |
| complain_overflow_signed, |
| bfd_elf_generic_reloc, /* FIXME? */ |
| "R_NIOS2_R2_T1I7_1_PCREL", |
| false, |
| 0xfe00, |
| 0xfe00, |
| true), |
| |
| HOWTO (R_NIOS2_R2_T1I7_2, |
| 2, |
| 2, |
| 7, |
| false, |
| 9, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_T1I7_2", |
| false, |
| 0xfe00, |
| 0xfe00, |
| false), |
| |
| HOWTO (R_NIOS2_R2_T2I4, |
| 0, |
| 2, |
| 4, |
| false, |
| 12, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_T2I4", |
| false, |
| 0xf000, |
| 0xf000, |
| false), |
| |
| HOWTO (R_NIOS2_R2_T2I4_1, |
| 1, |
| 2, |
| 4, |
| false, |
| 12, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_T2I4_1", |
| false, |
| 0xf000, |
| 0xf000, |
| false), |
| |
| HOWTO (R_NIOS2_R2_T2I4_2, |
| 2, |
| 2, |
| 4, |
| false, |
| 12, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_T2I4_2", |
| false, |
| 0xf000, |
| 0xf000, |
| false), |
| |
| HOWTO (R_NIOS2_R2_X1I7_2, |
| 2, |
| 2, |
| 7, |
| false, |
| 6, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_X1I7_2", |
| false, |
| 0x1fc0, |
| 0x1fc0, |
| false), |
| |
| HOWTO (R_NIOS2_R2_X2L5, |
| 0, |
| 2, |
| 5, |
| false, |
| 6, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_X2L5", |
| false, |
| 0x07c0, |
| 0x07c0, |
| false), |
| |
| HOWTO (R_NIOS2_R2_F1I5_2, |
| 2, |
| 2, |
| 5, |
| false, |
| 6, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_F1L5_2", |
| false, |
| 0x07c0, |
| 0x07c0, |
| false), |
| |
| HOWTO (R_NIOS2_R2_L5I4X1, |
| 2, |
| 2, |
| 4, |
| false, |
| 6, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_L5I4X1", |
| false, |
| 0x03c0, |
| 0x03c0, |
| false), |
| |
| HOWTO (R_NIOS2_R2_T1X1I6, |
| 0, |
| 2, |
| 6, |
| false, |
| 9, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_T1X1I6", |
| false, |
| 0x7e00, |
| 0x7e00, |
| false), |
| |
| HOWTO (R_NIOS2_R2_T1X1I6_2, |
| 2, |
| 4, |
| 6, |
| false, |
| 9, |
| complain_overflow_unsigned, |
| bfd_elf_generic_reloc, |
| "R_NIOS2_R2_T1I1X6_2", |
| false, |
| 0x7e00, |
| 0x7e00, |
| false), |
| |
| /* Add other relocations here. */ |
| }; |
| |
| static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1]; |
| |
| |
| /* Return true if producing output for a R2 BFD. */ |
| #define BFD_IS_R2(abfd) (bfd_get_mach (abfd) == bfd_mach_nios2r2) |
| |
| /* Return the howto for relocation RTYPE. */ |
| static reloc_howto_type * |
| lookup_howto (unsigned int rtype, bfd *abfd) |
| { |
| static int initialized = 0; |
| int i; |
| /* R2 relocations are a superset of R1, so use that for the lookup |
| table. */ |
| int r1_howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel); |
| int r2_howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel); |
| |
| if (!initialized) |
| { |
| initialized = 1; |
| memset (elf_code_to_howto_index, 0xff, |
| sizeof (elf_code_to_howto_index)); |
| for (i = 0; i < r2_howto_tbl_size; i++) |
| { |
| elf_code_to_howto_index[elf_nios2_r2_howto_table_rel[i].type] = i; |
| if (i < r1_howto_tbl_size) |
| BFD_ASSERT (elf_nios2_r2_howto_table_rel[i].type |
| == elf_nios2_r1_howto_table_rel[i].type); |
| } |
| } |
| |
| if (rtype > R_NIOS2_ILLEGAL) |
| return NULL; |
| i = elf_code_to_howto_index[rtype]; |
| if (BFD_IS_R2 (abfd)) |
| { |
| if (i >= r2_howto_tbl_size) |
| return NULL; |
| return elf_nios2_r2_howto_table_rel + i; |
| } |
| else |
| { |
| if (i >= r1_howto_tbl_size) |
| return NULL; |
| return elf_nios2_r1_howto_table_rel + i; |
| } |
| } |
| |
| /* Map for converting BFD reloc types to Nios II reloc types. */ |
| struct elf_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_val; |
| enum elf_nios2_reloc_type elf_val; |
| }; |
| |
| static const struct elf_reloc_map nios2_reloc_map[] = |
| { |
| {BFD_RELOC_NONE, R_NIOS2_NONE}, |
| {BFD_RELOC_NIOS2_S16, R_NIOS2_S16}, |
| {BFD_RELOC_NIOS2_U16, R_NIOS2_U16}, |
| {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16}, |
| {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26}, |
| {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5}, |
| {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX}, |
| {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6}, |
| {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8}, |
| {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16}, |
| {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16}, |
| {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16}, |
| {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32}, |
| {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16}, |
| {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8}, |
| {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL}, |
| {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT}, |
| {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY}, |
| {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP}, |
| {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP}, |
| {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR}, |
| {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN}, |
| {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16}, |
| {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16}, |
| {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO}, |
| {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA}, |
| {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO}, |
| {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA}, |
| {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16}, |
| {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16}, |
| {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16}, |
| {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16}, |
| {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16}, |
| {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD}, |
| {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL}, |
| {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL}, |
| {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY}, |
| {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT}, |
| {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT}, |
| {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE}, |
| {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF}, |
| {BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT}, |
| {BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO}, |
| {BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA}, |
| {BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO}, |
| {BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA}, |
| {BFD_RELOC_NIOS2_R2_S12, R_NIOS2_R2_S12}, |
| {BFD_RELOC_NIOS2_R2_I10_1_PCREL, R_NIOS2_R2_I10_1_PCREL}, |
| {BFD_RELOC_NIOS2_R2_T1I7_1_PCREL, R_NIOS2_R2_T1I7_1_PCREL}, |
| {BFD_RELOC_NIOS2_R2_T1I7_2, R_NIOS2_R2_T1I7_2}, |
| {BFD_RELOC_NIOS2_R2_T2I4, R_NIOS2_R2_T2I4}, |
| {BFD_RELOC_NIOS2_R2_T2I4_1, R_NIOS2_R2_T2I4_1}, |
| {BFD_RELOC_NIOS2_R2_T2I4_2, R_NIOS2_R2_T2I4_2}, |
| {BFD_RELOC_NIOS2_R2_X1I7_2, R_NIOS2_R2_X1I7_2}, |
| {BFD_RELOC_NIOS2_R2_X2L5, R_NIOS2_R2_X2L5}, |
| {BFD_RELOC_NIOS2_R2_F1I5_2, R_NIOS2_R2_F1I5_2}, |
| {BFD_RELOC_NIOS2_R2_L5I4X1, R_NIOS2_R2_L5I4X1}, |
| {BFD_RELOC_NIOS2_R2_T1X1I6, R_NIOS2_R2_T1X1I6}, |
| {BFD_RELOC_NIOS2_R2_T1X1I6_2, R_NIOS2_R2_T1X1I6_2}, |
| }; |
| |
| enum elf32_nios2_stub_type |
| { |
| nios2_stub_call26_before, |
| nios2_stub_call26_after, |
| nios2_stub_none |
| }; |
| |
| struct elf32_nios2_stub_hash_entry |
| { |
| /* Base hash table entry structure. */ |
| struct bfd_hash_entry bh_root; |
| |
| /* The stub section. */ |
| asection *stub_sec; |
| |
| /* Offset within stub_sec of the beginning of this stub. */ |
| bfd_vma stub_offset; |
| |
| /* Given the symbol's value and its section we can determine its final |
| value when building the stubs (so the stub knows where to jump. */ |
| bfd_vma target_value; |
| asection *target_section; |
| |
| enum elf32_nios2_stub_type stub_type; |
| |
| /* The symbol table entry, if any, that this was derived from. */ |
| struct elf32_nios2_link_hash_entry *hh; |
| |
| /* And the reloc addend that this was derived from. */ |
| bfd_vma addend; |
| |
| /* Where this stub is being called from, or, in the case of combined |
| stub sections, the first input section in the group. */ |
| asection *id_sec; |
| }; |
| |
| #define nios2_stub_hash_entry(ent) \ |
| ((struct elf32_nios2_stub_hash_entry *)(ent)) |
| |
| #define nios2_stub_hash_lookup(table, string, create, copy) \ |
| ((struct elf32_nios2_stub_hash_entry *) \ |
| bfd_hash_lookup ((table), (string), (create), (copy))) |
| |
| |
| /* Nios II ELF linker hash entry. */ |
| |
| struct elf32_nios2_link_hash_entry |
| { |
| struct elf_link_hash_entry root; |
| |
| /* A pointer to the most recently used stub hash entry against this |
| symbol. */ |
| struct elf32_nios2_stub_hash_entry *hsh_cache; |
| |
| #define GOT_UNKNOWN 0 |
| #define GOT_NORMAL 1 |
| #define GOT_TLS_GD 2 |
| #define GOT_TLS_IE 4 |
| unsigned char tls_type; |
| |
| /* We need to detect and take special action for symbols which are only |
| referenced with %call() and not with %got(). Such symbols do not need |
| a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy |
| linking will not work if the dynamic GOT reloc exists. |
| To check for this condition efficiently, we compare got_types_used against |
| CALL_USED, meaning |
| (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED. |
| */ |
| #define GOT_USED 1 |
| #define CALL_USED 2 |
| unsigned char got_types_used; |
| }; |
| |
| #define elf32_nios2_hash_entry(ent) \ |
| ((struct elf32_nios2_link_hash_entry *) (ent)) |
| |
| /* Get the Nios II elf linker hash table from a link_info structure. */ |
| #define elf32_nios2_hash_table(info) \ |
| ((struct elf32_nios2_link_hash_table *) ((info)->hash)) |
| |
| /* Nios II ELF linker hash table. */ |
| struct elf32_nios2_link_hash_table |
| { |
| /* The main hash table. */ |
| struct elf_link_hash_table root; |
| |
| /* The stub hash table. */ |
| struct bfd_hash_table bstab; |
| |
| /* Linker stub bfd. */ |
| bfd *stub_bfd; |
| |
| /* Linker call-backs. */ |
| asection * (*add_stub_section) (const char *, asection *, bool); |
| void (*layout_sections_again) (void); |
| |
| /* Array to keep track of which stub sections have been created, and |
| information on stub grouping. */ |
| struct map_stub |
| { |
| /* These are the section to which stubs in the group will be |
| attached. */ |
| asection *first_sec, *last_sec; |
| /* The stub sections. There might be stubs inserted either before |
| or after the real section.*/ |
| asection *first_stub_sec, *last_stub_sec; |
| } *stub_group; |
| |
| /* Assorted information used by nios2_elf32_size_stubs. */ |
| unsigned int bfd_count; |
| unsigned int top_index; |
| asection **input_list; |
| Elf_Internal_Sym **all_local_syms; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *sbss; |
| |
| /* GOT pointer symbol _gp_got. */ |
| struct elf_link_hash_entry *h_gp_got; |
| |
| union { |
| bfd_signed_vma refcount; |
| bfd_vma offset; |
| } tls_ldm_got; |
| |
| bfd_vma res_n_size; |
| }; |
| |
| struct nios2_elf32_obj_tdata |
| { |
| struct elf_obj_tdata root; |
| |
| /* tls_type for each local got entry. */ |
| char *local_got_tls_type; |
| |
| /* TRUE if TLS GD relocs have been seen for this object. */ |
| bool has_tlsgd; |
| }; |
| |
| #define elf32_nios2_tdata(abfd) \ |
| ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any) |
| |
| #define elf32_nios2_local_got_tls_type(abfd) \ |
| (elf32_nios2_tdata (abfd)->local_got_tls_type) |
| |
| /* The name of the dynamic interpreter. This is put in the .interp |
| section. */ |
| #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| |
| /* PLT implementation for position-dependent code. */ |
| static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */ |
| 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */ |
| 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */ |
| 0x7800683a /* jmp r15 */ |
| }; |
| |
| static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */ |
| 0x03800034, /* movhi r14, %hiadj(res_0) */ |
| 0x73800004, /* addi r14, r14, %lo(res_0) */ |
| 0x7b9fc83a, /* sub r15, r15, r14 */ |
| 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ |
| 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ |
| 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ |
| 0x6800683a /* jmp r13 */ |
| }; |
| |
| /* PLT implementation for position-independent code. */ |
| static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */ |
| 0x03c00034, /* movhi r15, %hiadj(index * 4) */ |
| 0x7bc00004, /* addi r15, r15, %lo(index * 4) */ |
| 0x00000006 /* br .PLTresolve */ |
| }; |
| |
| static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */ |
| 0x001ce03a, /* nextpc r14 */ |
| 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ |
| 0x6b9b883a, /* add r13, r13, r14 */ |
| 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ |
| 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ |
| 0x6800683a /* jmp r13 */ |
| }; |
| |
| /* CALL26 stub. */ |
| static const bfd_vma nios2_call26_stub_entry[] = { |
| 0x00400034, /* orhi at, r0, %hiadj(dest) */ |
| 0x08400004, /* addi at, at, %lo(dest) */ |
| 0x0800683a /* jmp at */ |
| }; |
| |
| /* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */ |
| static void |
| nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value) |
| { |
| bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset); |
| |
| BFD_ASSERT (value <= 0xffff || ((bfd_signed_vma) value) >= -0xffff); |
| |
| bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6), |
| sec->contents + offset); |
| } |
| |
| /* Install COUNT 32-bit values DATA starting at offset OFFSET into |
| section SEC. */ |
| static void |
| nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset, |
| int count) |
| { |
| while (count--) |
| { |
| bfd_put_32 (sec->owner, *data, sec->contents + offset); |
| offset += 4; |
| ++data; |
| } |
| } |
| |
| /* The usual way of loading a 32-bit constant into a Nios II register is to |
| load the high 16 bits in one instruction and then add the low 16 bits with |
| a signed add. This means that the high halfword needs to be adjusted to |
| compensate for the sign bit of the low halfword. This function returns the |
| adjusted high halfword for a given 32-bit constant. */ |
| static |
| bfd_vma hiadj (bfd_vma symbol_value) |
| { |
| return ((symbol_value + 0x8000) >> 16) & 0xffff; |
| } |
| |
| /* Implement elf_backend_grok_prstatus: |
| Support for core dump NOTE sections. */ |
| static bool |
| nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| { |
| int offset; |
| size_t size; |
| |
| switch (note->descsz) |
| { |
| default: |
| return false; |
| |
| case 212: /* Linux/Nios II */ |
| /* pr_cursig */ |
| elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| |
| /* pr_pid */ |
| elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); |
| |
| /* pr_reg */ |
| offset = 72; |
| size = 136; |
| |
| break; |
| } |
| |
| /* Make a ".reg/999" section. */ |
| return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| size, note->descpos + offset); |
| } |
| |
| /* Implement elf_backend_grok_psinfo. */ |
| static bool |
| nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| { |
| switch (note->descsz) |
| { |
| default: |
| return false; |
| |
| case 124: /* Linux/Nios II elf_prpsinfo */ |
| elf_tdata (abfd)->core->program |
| = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| elf_tdata (abfd)->core->command |
| = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| } |
| |
| /* Note that for some reason, a spurious space is tacked |
| onto the end of the args in some (at least one anyway) |
| implementations, so strip it off if it exists. */ |
| |
| { |
| char *command = elf_tdata (abfd)->core->command; |
| int n = strlen (command); |
| |
| if (0 < n && command[n - 1] == ' ') |
| command[n - 1] = '\0'; |
| } |
| |
| return true; |
| } |
| |
| /* Assorted hash table functions. */ |
| |
| /* Initialize an entry in the stub hash table. */ |
| static struct bfd_hash_entry * |
| stub_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 elf32_nios2_stub_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = bfd_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct elf32_nios2_stub_hash_entry *hsh; |
| |
| /* Initialize the local fields. */ |
| hsh = (struct elf32_nios2_stub_hash_entry *) entry; |
| hsh->stub_sec = NULL; |
| hsh->stub_offset = 0; |
| hsh->target_value = 0; |
| hsh->target_section = NULL; |
| hsh->stub_type = nios2_stub_none; |
| hsh->hh = NULL; |
| hsh->id_sec = NULL; |
| } |
| |
| return entry; |
| } |
| |
| /* Create an entry in a Nios II 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 elf32_nios2_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) |
| { |
| struct elf32_nios2_link_hash_entry *eh; |
| |
| eh = (struct elf32_nios2_link_hash_entry *) entry; |
| eh->hsh_cache = NULL; |
| eh->tls_type = GOT_UNKNOWN; |
| eh->got_types_used = 0; |
| } |
| |
| return entry; |
| } |
| |
| /* Section name for stubs is the associated section name plus this |
| string. */ |
| #define STUB_SUFFIX ".stub" |
| |
| /* Build a name for an entry in the stub hash table. */ |
| static char * |
| nios2_stub_name (const asection *input_section, |
| const asection *sym_sec, |
| const struct elf32_nios2_link_hash_entry *hh, |
| const Elf_Internal_Rela *rel, |
| enum elf32_nios2_stub_type stub_type) |
| { |
| char *stub_name; |
| bfd_size_type len; |
| char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a'; |
| |
| if (hh) |
| { |
| len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name != NULL) |
| { |
| sprintf (stub_name, "%08x_%c_%s+%x", |
| input_section->id & 0xffffffff, |
| stubpos, |
| hh->root.root.root.string, |
| (int) rel->r_addend & 0xffffffff); |
| } |
| } |
| else |
| { |
| len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name != NULL) |
| { |
| sprintf (stub_name, "%08x_%c_%x:%x+%x", |
| input_section->id & 0xffffffff, |
| stubpos, |
| sym_sec->id & 0xffffffff, |
| (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, |
| (int) rel->r_addend & 0xffffffff); |
| } |
| } |
| return stub_name; |
| } |
| |
| /* Look up an entry in the stub hash. Stub entries are cached because |
| creating the stub name takes a bit of time. */ |
| static struct elf32_nios2_stub_hash_entry * |
| nios2_get_stub_entry (const asection *input_section, |
| const asection *sym_sec, |
| struct elf32_nios2_link_hash_entry *hh, |
| const Elf_Internal_Rela *rel, |
| struct elf32_nios2_link_hash_table *htab, |
| enum elf32_nios2_stub_type stub_type) |
| { |
| struct elf32_nios2_stub_hash_entry *hsh; |
| const asection *id_sec; |
| |
| /* If this input section is part of a group of sections sharing one |
| stub section, then use the id of the first/last section in the group, |
| depending on the stub section placement relative to the group. |
| Stub names need to include a section id, as there may well be |
| more than one stub used to reach say, printf, and we need to |
| distinguish between them. */ |
| if (stub_type == nios2_stub_call26_before) |
| id_sec = htab->stub_group[input_section->id].first_sec; |
| else |
| id_sec = htab->stub_group[input_section->id].last_sec; |
| |
| if (hh != NULL && hh->hsh_cache != NULL |
| && hh->hsh_cache->hh == hh |
| && hh->hsh_cache->id_sec == id_sec |
| && hh->hsh_cache->stub_type == stub_type) |
| { |
| hsh = hh->hsh_cache; |
| } |
| else |
| { |
| char *stub_name; |
| |
| stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type); |
| if (stub_name == NULL) |
| return NULL; |
| |
| hsh = nios2_stub_hash_lookup (&htab->bstab, |
| stub_name, false, false); |
| |
| if (hh != NULL) |
| hh->hsh_cache = hsh; |
| |
| free (stub_name); |
| } |
| |
| return hsh; |
| } |
| |
| /* Add a new stub entry to the stub hash. Not all fields of the new |
| stub entry are initialised. */ |
| static struct elf32_nios2_stub_hash_entry * |
| nios2_add_stub (const char *stub_name, |
| asection *section, |
| struct elf32_nios2_link_hash_table *htab, |
| enum elf32_nios2_stub_type stub_type) |
| { |
| asection *link_sec; |
| asection *stub_sec; |
| asection **secptr, **linkptr; |
| struct elf32_nios2_stub_hash_entry *hsh; |
| bool afterp; |
| |
| if (stub_type == nios2_stub_call26_before) |
| { |
| link_sec = htab->stub_group[section->id].first_sec; |
| secptr = &(htab->stub_group[section->id].first_stub_sec); |
| linkptr = &(htab->stub_group[link_sec->id].first_stub_sec); |
| afterp = false; |
| } |
| else |
| { |
| link_sec = htab->stub_group[section->id].last_sec; |
| secptr = &(htab->stub_group[section->id].last_stub_sec); |
| linkptr = &(htab->stub_group[link_sec->id].last_stub_sec); |
| afterp = true; |
| } |
| stub_sec = *secptr; |
| if (stub_sec == NULL) |
| { |
| stub_sec = *linkptr; |
| if (stub_sec == NULL) |
| { |
| size_t namelen; |
| bfd_size_type len; |
| char *s_name; |
| |
| namelen = strlen (link_sec->name); |
| len = namelen + sizeof (STUB_SUFFIX); |
| s_name = bfd_alloc (htab->stub_bfd, len); |
| if (s_name == NULL) |
| return NULL; |
| |
| memcpy (s_name, link_sec->name, namelen); |
| memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| |
| stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp); |
| if (stub_sec == NULL) |
| return NULL; |
| *linkptr = stub_sec; |
| } |
| *secptr = stub_sec; |
| } |
| |
| /* Enter this entry into the linker stub hash table. */ |
| hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name, |
| true, false); |
| if (hsh == NULL) |
| { |
| /* xgettext:c-format */ |
| _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
| section->owner, |
| stub_name); |
| return NULL; |
| } |
| |
| hsh->stub_sec = stub_sec; |
| hsh->stub_offset = 0; |
| hsh->id_sec = link_sec; |
| return hsh; |
| } |
| |
| /* Set up various things so that we can make a list of input sections |
| for each output section included in the link. Returns -1 on error, |
| 0 when no stubs will be needed, and 1 on success. */ |
| int |
| nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) |
| { |
| bfd *input_bfd; |
| unsigned int bfd_count; |
| unsigned int top_id, top_index; |
| asection *section; |
| asection **input_list, **list; |
| size_t amt; |
| struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
| |
| /* Count the number of input BFDs and find the top input section id. */ |
| for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link.next) |
| { |
| bfd_count += 1; |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| if (top_id < section->id) |
| top_id = section->id; |
| } |
| } |
| |
| htab->bfd_count = bfd_count; |
| |
| amt = sizeof (struct map_stub) * (top_id + 1); |
| htab->stub_group = bfd_zmalloc (amt); |
| if (htab->stub_group == NULL) |
| return -1; |
| |
| /* We can't use output_bfd->section_count here to find the top output |
| section index as some sections may have been removed, and |
| strip_excluded_output_sections doesn't renumber the indices. */ |
| for (section = output_bfd->sections, top_index = 0; |
| section != NULL; |
| section = section->next) |
| { |
| if (top_index < section->index) |
| top_index = section->index; |
| } |
| |
| htab->top_index = top_index; |
| amt = sizeof (asection *) * (top_index + 1); |
| input_list = bfd_malloc (amt); |
| htab->input_list = input_list; |
| if (input_list == NULL) |
| return -1; |
| |
| /* For sections we aren't interested in, mark their entries with a |
| value we can check later. */ |
| list = input_list + top_index; |
| do |
| *list = bfd_abs_section_ptr; |
| while (list-- != input_list); |
| |
| for (section = output_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| /* FIXME: This is a bit of hack. Currently our .ctors and .dtors |
| * have PC relative relocs in them but no code flag set. */ |
| if (((section->flags & SEC_CODE) != 0) || |
| strcmp(".ctors", section->name) || |
| strcmp(".dtors", section->name)) |
| input_list[section->index] = NULL; |
| } |
| |
| return 1; |
| } |
| |
| /* The linker repeatedly calls this function for each input section, |
| in the order that input sections are linked into output sections. |
| Build lists of input sections to determine groupings between which |
| we may insert linker stubs. */ |
| void |
| nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec) |
| { |
| struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
| |
| if (isec->output_section->index <= htab->top_index) |
| { |
| asection **list = htab->input_list + isec->output_section->index; |
| if (*list != bfd_abs_section_ptr) |
| { |
| /* Steal the last_sec pointer for our list. |
| This happens to make the list in reverse order, |
| which is what we want. */ |
| htab->stub_group[isec->id].last_sec = *list; |
| *list = isec; |
| } |
| } |
| } |
| |
| /* Segment mask for CALL26 relocation relaxation. */ |
| #define CALL26_SEGMENT(x) ((x) & 0xf0000000) |
| |
| /* Fudge factor for approximate maximum size of all stubs that might |
| be inserted by the linker. This does not actually limit the number |
| of stubs that might be inserted, and only affects strategy for grouping |
| and placement of stubs. Perhaps this should be computed based on number |
| of relocations seen, or be specifiable on the command line. */ |
| #define MAX_STUB_SECTION_SIZE 0xffff |
| |
| /* See whether we can group stub sections together. Grouping stub |
| sections may result in fewer stubs. More importantly, we need to |
| put all .init* and .fini* stubs at the end of the .init or |
| .fini output sections respectively, because glibc splits the |
| _init and _fini functions into multiple parts. Putting a stub in |
| the middle of a function is not a good idea. |
| Rather than computing groups of a maximum fixed size, for Nios II |
| CALL26 relaxation it makes more sense to compute the groups based on |
| sections that fit within a 256MB address segment. Also do not allow |
| a group to span more than one output section, since different output |
| sections might correspond to different memory banks on a bare-metal |
| target, etc. */ |
| static void |
| group_sections (struct elf32_nios2_link_hash_table *htab) |
| { |
| asection **list = htab->input_list + htab->top_index; |
| do |
| { |
| /* The list is in reverse order so we'll search backwards looking |
| for the first section that begins in the same memory segment, |
| marking sections along the way to point at the tail for this |
| group. */ |
| asection *tail = *list; |
| if (tail == bfd_abs_section_ptr) |
| continue; |
| while (tail != NULL) |
| { |
| bfd_vma start = tail->output_section->vma + tail->output_offset; |
| bfd_vma end = start + tail->size; |
| bfd_vma segment = CALL26_SEGMENT (end); |
| asection *prev; |
| |
| if (segment != CALL26_SEGMENT (start) |
| || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE)) |
| /* This section spans more than one memory segment, or is |
| close enough to the end of the segment that adding stub |
| sections before it might cause it to move so that it |
| spans memory segments, or that stubs added at the end of |
| this group might overflow into the next memory segment. |
| Put it in a group by itself to localize the effects. */ |
| { |
| prev = htab->stub_group[tail->id].last_sec; |
| htab->stub_group[tail->id].last_sec = tail; |
| htab->stub_group[tail->id].first_sec = tail; |
| } |
| else |
| /* Collect more sections for this group. */ |
| { |
| asection *curr, *first; |
| for (curr = tail; ; curr = prev) |
| { |
| prev = htab->stub_group[curr->id].last_sec; |
| if (!prev |
| || tail->output_section != prev->output_section |
| || (CALL26_SEGMENT (prev->output_section->vma |
| + prev->output_offset) |
| != segment)) |
| break; |
| } |
| first = curr; |
| for (curr = tail; ; curr = prev) |
| { |
| prev = htab->stub_group[curr->id].last_sec; |
| htab->stub_group[curr->id].last_sec = tail; |
| htab->stub_group[curr->id].first_sec = first; |
| if (curr == first) |
| break; |
| } |
| } |
| |
| /* Reset tail for the next group. */ |
| tail = prev; |
| } |
| } |
| while (list-- != htab->input_list); |
| free (htab->input_list); |
| } |
| |
| /* Determine the type of stub needed, if any, for a call. */ |
| static enum elf32_nios2_stub_type |
| nios2_type_of_stub (asection *input_sec, |
| const Elf_Internal_Rela *rel, |
| struct elf32_nios2_link_hash_entry *hh, |
| struct elf32_nios2_link_hash_table *htab, |
| bfd_vma destination, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| { |
| bfd_vma location, segment, start, end; |
| asection *s0, *s1, *s; |
| |
| if (hh != NULL && |
| !(hh->root.root.type == bfd_link_hash_defined |
| || hh->root.root.type == bfd_link_hash_defweak)) |
| return nios2_stub_none; |
| |
| /* Determine where the call point is. */ |
| location = (input_sec->output_section->vma |
| + input_sec->output_offset + rel->r_offset); |
| segment = CALL26_SEGMENT (location); |
| |
| /* Nios II CALL and JMPI instructions can transfer control to addresses |
| within the same 256MB segment as the PC. */ |
| if (segment == CALL26_SEGMENT (destination)) |
| return nios2_stub_none; |
| |
| /* Find the start and end addresses of the stub group. Also account for |
| any already-created stub sections for this group. Note that for stubs |
| in the end section, only the first instruction of the last stub |
| (12 bytes long) needs to be within range. */ |
| s0 = htab->stub_group[input_sec->id].first_sec; |
| s = htab->stub_group[s0->id].first_stub_sec; |
| if (s != NULL && s->size > 0) |
| start = s->output_section->vma + s->output_offset; |
| else |
| start = s0->output_section->vma + s0->output_offset; |
| |
| s1 = htab->stub_group[input_sec->id].last_sec; |
| s = htab->stub_group[s1->id].last_stub_sec; |
| if (s != NULL && s->size > 0) |
| end = s->output_section->vma + s->output_offset + s->size - 8; |
| else |
| end = s1->output_section->vma + s1->output_offset + s1->size; |
| |
| BFD_ASSERT (start < end); |
| BFD_ASSERT (start <= location); |
| BFD_ASSERT (location < end); |
| |
| /* Put stubs at the end of the group unless that is not a valid |
| location and the beginning of the group is. It might be that |
| neither the beginning nor end works if we have an input section |
| so large that it spans multiple segment boundaries. In that |
| case, punt; the end result will be a relocation overflow error no |
| matter what we do here. |
| |
| Note that adding stubs pushes up the addresses of all subsequent |
| sections, so that stubs allocated on one pass through the |
| relaxation loop may not be valid on the next pass. (E.g., we may |
| allocate a stub at the beginning of the section on one pass and |
| find that the call site has been bumped into the next memory |
| segment on the next pass.) The important thing to note is that |
| we never try to reclaim the space allocated to such unused stubs, |
| so code size and section addresses can only increase with each |
| iteration. Accounting for the start and end addresses of the |
| already-created stub sections ensures that when the algorithm |
| converges, it converges accurately, with the entire appropriate |
| stub section accessible from the call site and not just the |
| address at the start or end of the stub group proper. */ |
| |
| if (segment == CALL26_SEGMENT (end)) |
| return nios2_stub_call26_after; |
| else if (segment == CALL26_SEGMENT (start)) |
| return nios2_stub_call26_before; |
| else |
| /* Perhaps this should be a dedicated error code. */ |
| return nios2_stub_none; |
| } |
| |
| static bool |
| nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) |
| { |
| struct elf32_nios2_stub_hash_entry *hsh |
| = (struct elf32_nios2_stub_hash_entry *) gen_entry; |
| asection *stub_sec = hsh->stub_sec; |
| bfd_vma sym_value; |
| struct bfd_link_info *info; |
| |
| info = (struct bfd_link_info *) in_arg; |
| |
| /* Fail if the target section could not be assigned to an output |
| section. The user should fix his linker script. */ |
| if (hsh->target_section->output_section == NULL |
| && info->non_contiguous_regions) |
| info->callbacks->einfo (_("%F%P: Could not assign `%pA' to an output section. " |
| "Retry without --enable-non-contiguous-regions.\n"), |
| hsh->target_section); |
| |
| /* Make a note of the offset within the stubs for this entry. */ |
| hsh->stub_offset = stub_sec->size; |
| |
| switch (hsh->stub_type) |
| { |
| case nios2_stub_call26_before: |
| case nios2_stub_call26_after: |
| /* A call26 stub looks like: |
| orhi at, %hiadj(dest) |
| addi at, at, %lo(dest) |
| jmp at |
| Note that call/jmpi instructions can't be used in PIC code |
| so there is no reason for the stub to be PIC, either. */ |
| sym_value = (hsh->target_value |
| + hsh->target_section->output_offset |
| + hsh->target_section->output_section->vma |
| + hsh->addend); |
| |
| nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry, |
| hsh->stub_offset, 3); |
| nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset, |
| hiadj (sym_value)); |
| nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4, |
| (sym_value & 0xffff)); |
| stub_sec->size += 12; |
| break; |
| default: |
| BFD_FAIL (); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* As above, but don't actually build the stub. Just bump offset so |
| we know stub section sizes. */ |
| static bool |
| nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) |
| { |
| struct elf32_nios2_stub_hash_entry *hsh |
| = (struct elf32_nios2_stub_hash_entry *) gen_entry; |
| |
| switch (hsh->stub_type) |
| { |
| case nios2_stub_call26_before: |
| case nios2_stub_call26_after: |
| hsh->stub_sec->size += 12; |
| break; |
| default: |
| BFD_FAIL (); |
| return false; |
| } |
| return true; |
| } |
| |
| /* Read in all local syms for all input bfds. |
| Returns -1 on error, 0 otherwise. */ |
| |
| static int |
| get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd, |
| struct bfd_link_info *info) |
| { |
| unsigned int bfd_indx; |
| Elf_Internal_Sym *local_syms, **all_local_syms; |
| struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
| |
| /* We want to read in symbol extension records only once. To do this |
| we need to read in the local symbols in parallel and save them for |
| later use; so hold pointers to the local symbols in an array. */ |
| size_t amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
| all_local_syms = bfd_zmalloc (amt); |
| htab->all_local_syms = all_local_syms; |
| if (all_local_syms == NULL) |
| return -1; |
| |
| /* Walk over all the input BFDs, swapping in local symbols. */ |
| for (bfd_indx = 0; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link.next, bfd_indx++) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| |
| /* We'll need the symbol table in a second. */ |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| if (symtab_hdr->sh_info == 0) |
| continue; |
| |
| /* We need an array of the local symbols attached to the input bfd. */ |
| local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| if (local_syms == NULL) |
| { |
| local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| symtab_hdr->sh_info, 0, |
| NULL, NULL, NULL); |
| /* Cache them for elf_link_input_bfd. */ |
| symtab_hdr->contents = (unsigned char *) local_syms; |
| } |
| if (local_syms == NULL) |
| return -1; |
| |
| all_local_syms[bfd_indx] = local_syms; |
| } |
| |
| return 0; |
| } |
| |
| /* Determine and set the size of the stub section for a final link. */ |
| bool |
| nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd, |
| struct bfd_link_info *info, |
| asection *(*add_stub_section) (const char *, |
| asection *, bool), |
| void (*layout_sections_again) (void)) |
| { |
| bool stub_changed = false; |
| struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); |
| |
| /* Stash our params away. */ |
| htab->stub_bfd = stub_bfd; |
| htab->add_stub_section = add_stub_section; |
| htab->layout_sections_again = layout_sections_again; |
| |
| /* FIXME: We only compute the section groups once. This could cause |
| problems if adding a large stub section causes following sections, |
| or parts of them, to move into another segment. However, this seems |
| to be consistent with the way other back ends handle this.... */ |
| group_sections (htab); |
| |
| if (get_local_syms (output_bfd, info->input_bfds, info)) |
| { |
| if (htab->all_local_syms) |
| goto error_ret_free_local; |
| return false; |
| } |
| |
| while (1) |
| { |
| bfd *input_bfd; |
| unsigned int bfd_indx; |
| asection *stub_sec; |
| |
| for (input_bfd = info->input_bfds, bfd_indx = 0; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link.next, bfd_indx++) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *section; |
| Elf_Internal_Sym *local_syms; |
| |
| /* We'll need the symbol table in a second. */ |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| if (symtab_hdr->sh_info == 0) |
| continue; |
| |
| local_syms = htab->all_local_syms[bfd_indx]; |
| |
| /* Walk over each section attached to the input bfd. */ |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| |
| /* If there aren't any relocs, then there's nothing more |
| to do. */ |
| if ((section->flags & SEC_RELOC) == 0 |
| || section->reloc_count == 0) |
| continue; |
| |
| /* If this section is a link-once section that will be |
| discarded, then don't create any stubs. */ |
| if (section->output_section == NULL |
| || section->output_section->owner != output_bfd) |
| continue; |
| |
| /* Get the relocs. */ |
| internal_relocs |
| = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, |
| info->keep_memory); |
| if (internal_relocs == NULL) |
| goto error_ret_free_local; |
| |
| /* Now examine each relocation. */ |
| irela = internal_relocs; |
| irelaend = irela + section->reloc_count; |
| for (; irela < irelaend; irela++) |
| { |
| unsigned int r_type, r_indx; |
| enum elf32_nios2_stub_type stub_type; |
| struct elf32_nios2_stub_hash_entry *hsh; |
| asection *sym_sec; |
| bfd_vma sym_value; |
| bfd_vma destination; |
| struct elf32_nios2_link_hash_entry *hh; |
| char *stub_name; |
| const asection *id_sec; |
| |
| r_type = ELF32_R_TYPE (irela->r_info); |
| r_indx = ELF32_R_SYM (irela->r_info); |
| |
| if (r_type >= (unsigned int) R_NIOS2_ILLEGAL) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| error_ret_free_internal: |
| if (elf_section_data (section)->relocs == NULL) |
| free (internal_relocs); |
| goto error_ret_free_local; |
| } |
| |
| /* Only look for stubs on CALL and JMPI instructions. */ |
| if (r_type != (unsigned int) R_NIOS2_CALL26) |
| continue; |
| |
| /* Now determine the call target, its name, value, |
| section. */ |
| sym_sec = NULL; |
| sym_value = 0; |
| destination = 0; |
| hh = NULL; |
| if (r_indx < symtab_hdr->sh_info) |
| { |
| /* It's a local symbol. */ |
| Elf_Internal_Sym *sym; |
| Elf_Internal_Shdr *hdr; |
| unsigned int shndx; |
| |
| sym = local_syms + r_indx; |
| if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| sym_value = sym->st_value; |
| shndx = sym->st_shndx; |
| if (shndx < elf_numsections (input_bfd)) |
| { |
| hdr = elf_elfsections (input_bfd)[shndx]; |
| sym_sec = hdr->bfd_section; |
| destination = (sym_value + irela->r_addend |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| } |
| } |
| else |
| { |
| /* It's an external symbol. */ |
| int e_indx; |
| |
| e_indx = r_indx - symtab_hdr->sh_info; |
| hh = ((struct elf32_nios2_link_hash_entry *) |
| elf_sym_hashes (input_bfd)[e_indx]); |
| |
| while (hh->root.root.type == bfd_link_hash_indirect |
| || hh->root.root.type == bfd_link_hash_warning) |
| hh = ((struct elf32_nios2_link_hash_entry *) |
| hh->root.root.u.i.link); |
| |
| if (hh->root.root.type == bfd_link_hash_defined |
| || hh->root.root.type == bfd_link_hash_defweak) |
| { |
| sym_sec = hh->root.root.u.def.section; |
| sym_value = hh->root.root.u.def.value; |
| |
| if (sym_sec->output_section != NULL) |
| destination = (sym_value + irela->r_addend |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| else |
| continue; |
| } |
| else if (hh->root.root.type == bfd_link_hash_undefweak) |
| { |
| if (! bfd_link_pic (info)) |
| continue; |
| } |
| else if (hh->root.root.type == bfd_link_hash_undefined) |
| { |
| if (! (info->unresolved_syms_in_objects == RM_IGNORE |
| && (ELF_ST_VISIBILITY (hh->root.other) |
| == STV_DEFAULT))) |
| continue; |
| } |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| goto error_ret_free_internal; |
| } |
| } |
| |
| /* Determine what (if any) linker stub is needed. */ |
| stub_type = nios2_type_of_stub (section, irela, hh, htab, |
| destination, info); |
| if (stub_type == nios2_stub_none) |
| continue; |
| |
| /* Support for grouping stub sections. */ |
| if (stub_type == nios2_stub_call26_before) |
| id_sec = htab->stub_group[section->id].first_sec; |
| else |
| id_sec = htab->stub_group[section->id].last_sec; |
| |
| /* Get the name of this stub. */ |
| stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela, |
| stub_type); |
| if (!stub_name) |
| goto error_ret_free_internal; |
| |
| hsh = nios2_stub_hash_lookup (&htab->bstab, |
| stub_name, |
| false, false); |
| if (hsh != NULL) |
| { |
| /* The proper stub has already been created. */ |
| free (stub_name); |
| continue; |
| } |
| |
| hsh = nios2_add_stub (stub_name, section, htab, stub_type); |
| if (hsh == NULL) |
| { |
| free (stub_name); |
| goto error_ret_free_internal; |
| } |
| hsh->target_value = sym_value; |
| hsh->target_section = sym_sec; |
| hsh->stub_type = stub_type; |
| hsh->hh = hh; |
| hsh->addend = irela->r_addend; |
| stub_changed = true; |
| } |
| |
| /* We're done with the internal relocs, free them. */ |
| if (elf_section_data (section)->relocs == NULL) |
| free (internal_relocs); |
| } |
| } |
| |
| if (!stub_changed) |
| break; |
| |
| /* OK, we've added some stubs. Find out the new size of the |
| stub sections. */ |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| stub_sec->size = 0; |
| |
| bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab); |
| |
| /* Ask the linker to do its stuff. */ |
| (*htab->layout_sections_again) (); |
| stub_changed = false; |
| } |
| |
| free (htab->all_local_syms); |
| return true; |
| |
| error_ret_free_local: |
| free (htab->all_local_syms); |
| return false; |
| } |
| |
| /* Build all the stubs associated with the current output file. The |
| stubs are kept in a hash table attached to the main linker hash |
| table. This function is called via nios2elf_finish in the linker. */ |
| bool |
| nios2_elf32_build_stubs (struct bfd_link_info *info) |
| { |
| asection *stub_sec; |
| struct bfd_hash_table *table; |
| struct elf32_nios2_link_hash_table *htab; |
| |
| htab = elf32_nios2_hash_table (info); |
| |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| /* The stub_bfd may contain non-stub sections if it is also the |
| dynobj. Any such non-stub sections are created with the |
| SEC_LINKER_CREATED flag set, while stub sections do not |
| have that flag. Ignore any non-stub sections here. */ |
| if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) |
| { |
| bfd_size_type size; |
| |
| /* Allocate memory to hold the linker stubs. */ |
| size = stub_sec->size; |
| stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); |
| if (stub_sec->contents == NULL && size != 0) |
| return false; |
| stub_sec->size = 0; |
| } |
| |
| /* Build the stubs as directed by the stub hash table. */ |
| table = &htab->bstab; |
| bfd_hash_traverse (table, nios2_build_one_stub, info); |
| |
| return true; |
| } |
| |
| |
| #define is_nios2_elf(bfd) \ |
| (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| && elf_object_id (bfd) == NIOS2_ELF_DATA) |
| |
| /* Merge backend specific data from an object file to the output |
| object file when linking. */ |
| |
| static bool |
| nios2_elf32_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| { |
| bfd *obfd = info->output_bfd; |
| flagword old_flags; |
| flagword new_flags; |
| |
| if (!is_nios2_elf (ibfd) || !is_nios2_elf (obfd)) |
| return true; |
| |
| /* Check if we have the same endianness. */ |
| if (! _bfd_generic_verify_endian_match (ibfd, info)) |
| return false; |
| |
| new_flags = elf_elfheader (ibfd)->e_flags; |
| old_flags = elf_elfheader (obfd)->e_flags; |
| if (!elf_flags_init (obfd)) |
| { |
| /* First call, no flags set. */ |
| elf_flags_init (obfd) = true; |
| elf_elfheader (obfd)->e_flags = new_flags; |
| |
| switch (new_flags) |
| { |
| default: |
| case EF_NIOS2_ARCH_R1: |
| bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r1); |
| break; |
| case EF_NIOS2_ARCH_R2: |
| if (bfd_big_endian (ibfd)) |
| { |
| _bfd_error_handler |
| (_("error: %pB: big-endian R2 is not supported"), ibfd); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r2); |
| break; |
| } |
| } |
| |
| /* Incompatible flags. */ |
| else if (new_flags != old_flags) |
| { |
| /* So far, the only incompatible flags denote incompatible |
| architectures. */ |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("error: %pB: conflicting CPU architectures %d/%d"), |
| ibfd, new_flags, old_flags); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| /* Merge Tag_compatibility attributes and any common GNU ones. */ |
| _bfd_elf_merge_object_attributes (ibfd, info); |
| |
| return true; |
| } |
| |
| /* Implement bfd_elf32_bfd_reloc_type_lookup: |
| Given a BFD reloc type, return a howto structure. */ |
| |
| static reloc_howto_type * |
| nios2_elf32_bfd_reloc_type_lookup (bfd *abfd, |
| bfd_reloc_code_real_type code) |
| { |
| int i; |
| |
| for (i = 0; i < (int) ARRAY_SIZE (nios2_reloc_map); ++i) |
| if (nios2_reloc_map[i].bfd_val == code) |
| return lookup_howto (nios2_reloc_map[i].elf_val, abfd); |
| return NULL; |
| } |
| |
| /* Implement bfd_elf32_bfd_reloc_name_lookup: |
| Given a reloc name, return a howto structure. */ |
| |
| static reloc_howto_type * |
| nios2_elf32_bfd_reloc_name_lookup (bfd *abfd, |
| const char *r_name) |
| { |
| int i; |
| reloc_howto_type *howto_tbl; |
| int howto_tbl_size; |
| |
| if (BFD_IS_R2 (abfd)) |
| { |
| howto_tbl = elf_nios2_r2_howto_table_rel; |
| howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel); |
| } |
| else |
| { |
| howto_tbl = elf_nios2_r1_howto_table_rel; |
| howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel); |
| } |
| |
| for (i = 0; i < howto_tbl_size; i++) |
| if (howto_tbl[i].name && strcasecmp (howto_tbl[i].name, r_name) == 0) |
| return howto_tbl + i; |
| |
| return NULL; |
| } |
| |
| /* Implement elf_info_to_howto: |
| Given a ELF32 relocation, fill in a arelent structure. */ |
| |
| static bool |
| nios2_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr, |
| Elf_Internal_Rela *dst) |
| { |
| unsigned int r_type; |
| |
| r_type = ELF32_R_TYPE (dst->r_info); |
| if ((cache_ptr->howto = lookup_howto (r_type, abfd)) == NULL) |
| { |
| /* xgettext:c-format */ |
| _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| abfd, r_type); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| 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 address - htab->tls_sec->vma; |
| } |
| |
| /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| dangerous relocation. */ |
| static bool |
| nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info) |
| { |
| |
| bool gp_found; |
| struct bfd_hash_entry *h; |
| struct bfd_link_hash_entry *lh; |
| |
| /* If we've already figured out what GP will be, just return it. */ |
| *pgp = _bfd_get_gp_value (output_bfd); |
| if (*pgp) |
| return true; |
| |
| h = bfd_hash_lookup (&info->hash->table, "_gp", false, false); |
| lh = (struct bfd_link_hash_entry *) h; |
| lookup: |
| if (lh) |
| { |
| switch (lh->type) |
| { |
| case bfd_link_hash_undefined: |
| case bfd_link_hash_undefweak: |
| case bfd_link_hash_common: |
| gp_found = false; |
| break; |
| case bfd_link_hash_defined: |
| case bfd_link_hash_defweak: |
| gp_found = true; |
| { |
| asection *sym_sec = lh->u.def.section; |
| bfd_vma sym_value = lh->u.def.value; |
| |
| if (sym_sec->output_section) |
| sym_value = (sym_value + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| *pgp = sym_value; |
| } |
| break; |
| case bfd_link_hash_indirect: |
| case bfd_link_hash_warning: |
| lh = lh->u.i.link; |
| /* @@FIXME ignoring warning for now */ |
| goto lookup; |
| case bfd_link_hash_new: |
| default: |
| abort (); |
| } |
| } |
| else |
| gp_found = false; |
| |
| if (!gp_found) |
| { |
| /* Only get the error once. */ |
| *pgp = 4; |
| _bfd_set_gp_value (output_bfd, *pgp); |
| return false; |
| } |
| |
| _bfd_set_gp_value (output_bfd, *pgp); |
| |
| return true; |
| } |
| |
| /* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous |
| if it's not available as we don't have a link_info pointer available here |
| to look it up in the output symbol table. We don't need to adjust the |
| symbol value for an external symbol if we are producing relocatable |
| output. */ |
| static bfd_reloc_status_type |
| nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bool relocatable, |
| char **error_message, bfd_vma *pgp) |
| { |
| if (bfd_is_und_section (symbol->section) && !relocatable) |
| { |
| *pgp = 0; |
| return bfd_reloc_undefined; |
| } |
| |
| *pgp = _bfd_get_gp_value (output_bfd); |
| if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| { |
| if (relocatable) |
| { |
| /* Make up a value. */ |
| *pgp = symbol->section->output_section->vma + 0x4000; |
| _bfd_set_gp_value (output_bfd, *pgp); |
| } |
| else |
| { |
| *error_message |
| = (char *) _("global pointer relative relocation when _gp not defined"); |
| return bfd_reloc_dangerous; |
| } |
| } |
| |
| return bfd_reloc_ok; |
| } |
| |
| /* Do the relocations that require special handling. */ |
| static bfd_reloc_status_type |
| nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| symbol_value = symbol_value + addend; |
| addend = 0; |
| symbol_value = (symbol_value >> 16) & 0xffff; |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| symbol_value = symbol_value + addend; |
| addend = 0; |
| symbol_value = symbol_value & 0xffff; |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| symbol_value = symbol_value + addend; |
| addend = 0; |
| symbol_value = hiadj(symbol_value); |
| return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, |
| symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| symbol_value = symbol_value + addend; |
| addend = 0; |
| symbol_value = symbol_value & 0xffff; |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| symbol_value = symbol_value + addend; |
| symbol_value -= (input_section->output_section->vma |
| + input_section->output_offset); |
| symbol_value -= offset; |
| addend = 0; |
| symbol_value = hiadj(symbol_value); |
| return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, |
| symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| /* NIOS2 pc relative relocations are relative to the next 32-bit instruction |
| so we need to subtract 4 before doing a final_link_relocate. */ |
| symbol_value = symbol_value + addend - 4; |
| addend = 0; |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| /* Check that the relocation is in the same page as the current address. */ |
| if (CALL26_SEGMENT (symbol_value + addend) |
| != CALL26_SEGMENT (input_section->output_section->vma |
| + input_section->output_offset |
| + offset)) |
| return bfd_reloc_overflow; |
| |
| /* Check that the target address is correctly aligned on a 4-byte |
| boundary. */ |
| if ((symbol_value + addend) & 0x3) |
| return bfd_reloc_overflow; |
| |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| /* Because we need the output_bfd, the special handling is done |
| in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */ |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| bfd_vma symbol_lo16, symbol_hi16; |
| bfd_reloc_status_type r; |
| symbol_value = symbol_value + addend; |
| addend = 0; |
| symbol_hi16 = (symbol_value >> 16) & 0xffff; |
| symbol_lo16 = symbol_value & 0xffff; |
| |
| r = _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_hi16, addend); |
| |
| if (r == bfd_reloc_ok) |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset + 4, symbol_lo16, addend); |
| |
| return r; |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| bfd_vma symbol_lo16, symbol_hi16; |
| bfd_reloc_status_type r; |
| symbol_value = symbol_value + addend; |
| addend = 0; |
| symbol_hi16 = (symbol_value >> 16) & 0xffff; |
| symbol_lo16 = symbol_value & 0xffff; |
| |
| r = _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_hi16, addend); |
| |
| if (r == bfd_reloc_ok) |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset + 4, symbol_lo16, addend); |
| |
| return r; |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto, |
| asection *input_section, |
| bfd_byte *data, bfd_vma offset, |
| bfd_vma symbol_value, bfd_vma addend) |
| { |
| bfd_vma symbol_lo16, symbol_hi16; |
| bfd_reloc_status_type r; |
| symbol_value = symbol_value + addend; |
| addend = 0; |
| symbol_hi16 = (symbol_value >> 16) & 0xffff; |
| symbol_lo16 = symbol_value & 0xffff; |
| |
| r = _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_hi16, addend); |
| |
| if (r == bfd_reloc_ok) |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset + 4, symbol_lo16, addend); |
| |
| return r; |
| } |
| |
| /* HOWTO handlers for relocations that require special handling. */ |
| |
| /* This is for relocations used only when relaxing to ensure |
| changes in size of section don't screw up .align. */ |
| static bfd_reloc_status_type |
| nios2_elf32_ignore_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 != NULL) |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry, |
| asymbol *symbol, void *data, |
| asection *input_section, bfd *output_bfd, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_pcrel_lo16_relocate ( |
| abfd, reloc_entry->howto, input_section, data, reloc_entry->address, |
| (symbol->value + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, |
| asymbol *symbol, void *data, |
| asection *input_section, bfd *output_bfd, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_pcrel_hiadj16_relocate ( |
| abfd, reloc_entry->howto, input_section, data, reloc_entry->address, |
| (symbol->value + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, |
| char **error_message ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **msg) |
| { |
| bfd_vma relocation; |
| bfd_vma gp; |
| bfd_reloc_status_type r; |
| |
| |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| relocation = (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset); |
| |
| /* This assumes we've already cached the _gp symbol. */ |
| r = nios2_elf_final_gp (abfd, symbol, false, msg, &gp); |
| if (r == bfd_reloc_ok) |
| { |
| relocation = relocation + reloc_entry->addend - gp; |
| reloc_entry->addend = 0; |
| if ((signed) relocation < -32768 || (signed) relocation > 32767) |
| { |
| *msg = _("global pointer relative address out of range"); |
| r = bfd_reloc_outofrange; |
| } |
| else |
| r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| relocation, reloc_entry->addend); |
| } |
| |
| return r; |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| static bfd_reloc_status_type |
| nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| void *data, asection *input_section, |
| bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) |
| { |
| /* This part is from bfd_elf_generic_reloc. */ |
| if (output_bfd != NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| /* FIXME: See bfd_perform_relocation. Is this right? */ |
| return bfd_reloc_continue; |
| |
| return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| |
| /* Implement elf_backend_relocate_section. */ |
| static int |
| nios2_elf32_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 elf32_nios2_link_hash_table *htab; |
| asection *sgot; |
| asection *splt; |
| asection *sreloc = NULL; |
| bfd_vma *local_got_offsets; |
| bfd_vma got_base; |
| |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (input_bfd); |
| relend = relocs + input_section->reloc_count; |
| |
| htab = elf32_nios2_hash_table (info); |
| sgot = htab->root.sgot; |
| splt = htab->root.splt; |
| local_got_offsets = elf_local_got_offsets (input_bfd); |
| |
| if (htab->h_gp_got == NULL) |
| got_base = 0; |
| else |
| got_base = htab->h_gp_got->root.u.def.value; |
| |
| 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; |
| struct elf32_nios2_link_hash_entry *eh; |
| bfd_vma relocation; |
| bfd_vma gp; |
| bfd_reloc_status_type r = bfd_reloc_ok; |
| const char *name = NULL; |
| int r_type; |
| const char *format; |
| char *msgbuf = NULL; |
| char *msg = NULL; |
| bool unresolved_reloc; |
| bfd_vma off; |
| int use_plt; |
| |
| r_type = ELF32_R_TYPE (rel->r_info); |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| |
| howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info), output_bfd); |
| 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); |
| } |
| else |
| { |
| bool 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 && discarded_section (sec)) |
| RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| rel, 1, relend, howto, 0, contents); |
| |
| /* Nothing more to do unless this is a final link. */ |
| if (bfd_link_relocatable (info)) |
| continue; |
| |
| if (howto) |
| { |
| bool resolved_to_zero; |
| |
| resolved_to_zero = (h != NULL |
| && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); |
| switch (howto->type) |
| { |
| case R_NIOS2_HI16: |
| r = nios2_elf32_do_hi16_relocate (input_bfd, howto, |
| input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| break; |
| case R_NIOS2_LO16: |
| r = nios2_elf32_do_lo16_relocate (input_bfd, howto, |
| input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| break; |
| case R_NIOS2_PCREL_LO: |
| r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto, |
| input_section, |
| contents, |
| rel->r_offset, |
| relocation, |
| rel->r_addend); |
| break; |
| case R_NIOS2_HIADJ16: |
| r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| case R_NIOS2_PCREL_HA: |
| r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto, |
| input_section, |
| contents, |
| rel->r_offset, |
| relocation, |
| rel->r_addend); |
| break; |
| case R_NIOS2_PCREL16: |
| r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| case R_NIOS2_GPREL: |
| /* Turns an absolute address into a gp-relative address. */ |
| if (!nios2_elf_assign_gp (output_bfd, &gp, info)) |
| { |
| bfd_vma reloc_address; |
| |
| if (sec && sec->output_section) |
| reloc_address = (sec->output_section->vma |
| + sec->output_offset |
| + rel->r_offset); |
| else |
| reloc_address = 0; |
| |
| format = _("global pointer relative relocation at address " |
| "%#" PRIx64 " when _gp not defined\n"); |
| if (asprintf (&msgbuf, format, |
| (uint64_t) reloc_address) == -1) |
| msgbuf = NULL; |
| msg = msgbuf; |
| r = bfd_reloc_dangerous; |
| } |
| else |
| { |
| bfd_vma symbol_address = rel->r_addend + relocation; |
| relocation = symbol_address - gp; |
| rel->r_addend = 0; |
| if (((signed) relocation < -32768 |
| || (signed) relocation > 32767) |
| && (!h |
| || h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak)) |
| { |
| if (h) |
| 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 || *name == '\0') |
| name = bfd_section_name (sec); |
| } |
| /* xgettext:c-format */ |
| format = _("unable to reach %s (at %#" PRIx64 ") from " |
| "the global pointer (at %#" PRIx64 ") " |
| "because the offset (%" PRId64 ") is out of " |
| "the allowed range, -32678 to 32767\n" ); |
| if (asprintf (&msgbuf, format, name, |
| (uint64_t) symbol_address, (uint64_t) gp, |
| (int64_t) relocation) == -1) |
| msgbuf = NULL; |
| msg = msgbuf; |
| r = bfd_reloc_outofrange; |
| } |
| else |
| r = _bfd_final_link_relocate (howto, input_bfd, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| } |
| break; |
| case R_NIOS2_UJMP: |
| r = nios2_elf32_do_ujmp_relocate (input_bfd, howto, |
| input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| break; |
| case R_NIOS2_CJMP: |
| r = nios2_elf32_do_cjmp_relocate (input_bfd, howto, |
| input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| break; |
| case R_NIOS2_CALLR: |
| r = nios2_elf32_do_callr_relocate (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| case R_NIOS2_CALL26: |
| case R_NIOS2_CALL26_NOAT: |
| /* If we have a call to an undefined weak symbol, we just want |
| to stuff a zero in the bits of the call instruction and |
| bypass the normal call26 relocation handling, because it'll |
| diagnose an overflow error if address 0 isn't in the same |
| 256MB segment as the call site. Presumably the call |
| should be guarded by a null check anyway. */ |
| if (h != NULL && h->root.type == bfd_link_hash_undefweak) |
| { |
| BFD_ASSERT (relocation == 0 && rel->r_addend == 0); |
| r = _bfd_final_link_relocate (howto, input_bfd, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| } |
| /* Handle relocations which should use the PLT entry. |
| NIOS2_BFD_RELOC_32 relocations will use the symbol's value, |
| which may point to a PLT entry, but we don't need to handle |
| that here. If we created a PLT entry, all branches in this |
| object should go to it. */ |
| if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) |
| { |
| /* If we've created a .plt section, and assigned a PLT entry |
| to this function, it should not be known to bind locally. |
| If it were, we would have cleared the PLT entry. */ |
| BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); |
| |
| relocation = (splt->output_section->vma |
| + splt->output_offset |
| + h->plt.offset); |
| |
| unresolved_reloc = false; |
| } |
| /* Detect R_NIOS2_CALL26 relocations that would overflow the |
| 256MB segment. Replace the target with a reference to a |
| trampoline instead. |
| Note that htab->stub_group is null if relaxation has been |
| disabled by the --no-relax linker command-line option, so |
| we can use that to skip this processing entirely. */ |
| if (howto->type == R_NIOS2_CALL26 && htab->stub_group) |
| { |
| bfd_vma dest = relocation + rel->r_addend; |
| enum elf32_nios2_stub_type stub_type; |
| |
| eh = (struct elf32_nios2_link_hash_entry *)h; |
| stub_type = nios2_type_of_stub (input_section, rel, eh, |
| htab, dest, NULL); |
| |
| if (stub_type != nios2_stub_none) |
| { |
| struct elf32_nios2_stub_hash_entry *hsh; |
| |
| hsh = nios2_get_stub_entry (input_section, sec, |
| eh, rel, htab, stub_type); |
| if (hsh == NULL) |
| { |
| r = bfd_reloc_undefined; |
| break; |
| } |
| |
| dest = (hsh->stub_offset |
| + hsh->stub_sec->output_offset |
| + hsh->stub_sec->output_section->vma); |
| r = nios2_elf32_do_call26_relocate (input_bfd, howto, |
| input_section, |
| contents, |
| rel->r_offset, |
| dest, 0); |
| break; |
| } |
| } |
| |
| /* Normal case. */ |
| r = nios2_elf32_do_call26_relocate (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| case R_NIOS2_ALIGN: |
| r = bfd_reloc_ok; |
| /* For symmetry this would be |
| r = nios2_elf32_do_ignore_reloc (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| but do_ignore_reloc would do no more than return |
| bfd_reloc_ok. */ |
| break; |
| |
| case R_NIOS2_GOT16: |
| case R_NIOS2_CALL16: |
| case R_NIOS2_GOT_LO: |
| case R_NIOS2_GOT_HA: |
| case R_NIOS2_CALL_LO: |
| case R_NIOS2_CALL_HA: |
| /* Relocation is to the entry for this symbol in the |
| global offset table. */ |
| if (sgot == NULL) |
| { |
| r = bfd_reloc_notsupported; |
| break; |
| } |
| |
| use_plt = 0; |
| |
| if (h != NULL) |
| { |
| bool dyn; |
| |
| eh = (struct elf32_nios2_link_hash_entry *)h; |
| use_plt = (eh->got_types_used == CALL_USED |
| && h->plt.offset != (bfd_vma) -1); |
| |
| off = h->got.offset; |
| BFD_ASSERT (off != (bfd_vma) -1); |
| dyn = htab->root.dynamic_sections_created; |
| if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| bfd_link_pic (info), |
| h) |
| || (bfd_link_pic (info) |
| && SYMBOL_REFERENCES_LOCAL (info, h)) |
| || ((ELF_ST_VISIBILITY (h->other) |
| || resolved_to_zero) |
| && 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. 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 |
| { |
| bfd_put_32 (output_bfd, relocation, |
| sgot->contents + off); |
| h->got.offset |= 1; |
| } |
| } |
| else |
| unresolved_reloc = false; |
| } |
| else |
| { |
| BFD_ASSERT (local_got_offsets != NULL |
| && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| |
| 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, |
| sgot->contents + off); |
| |
| if (bfd_link_pic (info)) |
| { |
| asection *srelgot; |
| Elf_Internal_Rela outrel; |
| bfd_byte *loc; |
| |
| srelgot = htab->root.srelgot; |
| BFD_ASSERT (srelgot != NULL); |
| |
| outrel.r_addend = relocation; |
| outrel.r_offset = (sgot->output_section->vma |
| + sgot->output_offset |
| + off); |
| outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); |
| 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 (use_plt && bfd_link_pic (info)) |
| { |
| off = ((h->plt.offset - 24) / 12 + 3) * 4; |
| relocation = (htab->root.sgotplt->output_offset + off |
| - got_base); |
| } |
| else |
| relocation = sgot->output_offset + off - got_base; |
| |
| /* This relocation does not use the addend. */ |
| rel->r_addend = 0; |
| |
| switch (howto->type) |
| { |
| case R_NIOS2_GOT_LO: |
| case R_NIOS2_CALL_LO: |
| r = nios2_elf32_do_lo16_relocate (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| case R_NIOS2_GOT_HA: |
| case R_NIOS2_CALL_HA: |
| r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, |
| relocation, |
| rel->r_addend); |
| break; |
| default: |
| r = _bfd_final_link_relocate (howto, input_bfd, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| } |
| break; |
| |
| case R_NIOS2_GOTOFF_LO: |
| case R_NIOS2_GOTOFF_HA: |
| case R_NIOS2_GOTOFF: |
| /* Relocation is relative to the global offset table pointer. */ |
| |
| BFD_ASSERT (sgot != NULL); |
| if (sgot == NULL) |
| { |
| r = bfd_reloc_notsupported; |
| break; |
| } |
| |
| /* Note that sgot->output_offset is not involved in this |
| calculation. We always want the start of .got. */ |
| relocation -= sgot->output_section->vma; |
| |
| /* Now we adjust the relocation to be relative to the GOT pointer |
| (the _gp_got symbol), which possibly contains the 0x8000 bias. */ |
| relocation -= got_base; |
| |
| switch (howto->type) |
| { |
| case R_NIOS2_GOTOFF_LO: |
| r = nios2_elf32_do_lo16_relocate (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| case R_NIOS2_GOTOFF_HA: |
| r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, |
| input_section, contents, |
| rel->r_offset, |
| relocation, |
| rel->r_addend); |
| break; |
| default: |
| r = _bfd_final_link_relocate (howto, input_bfd, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| } |
| break; |
| |
| case R_NIOS2_TLS_LDO16: |
| relocation -= dtpoff_base (info) + DTP_OFFSET; |
| |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| break; |
| case R_NIOS2_TLS_LDM16: |
| if (htab->root.sgot == NULL) |
| abort (); |
| |
| off = htab->tls_ldm_got.offset; |
| |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| /* If we don't know the module number, create a relocation |
| for it. */ |
| if (bfd_link_pic (info)) |
| { |
| Elf_Internal_Rela outrel; |
| bfd_byte *loc; |
| |
| if (htab->root.srelgot == NULL) |
| abort (); |
| |
| outrel.r_addend = 0; |
| outrel.r_offset = (htab->root.sgot->output_section->vma |
| + htab->root.sgot->output_offset |
| + off); |
| outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD); |
| |
| loc = htab->root.srelgot->contents; |
| loc += (htab->root.srelgot->reloc_count++ |
| * sizeof (Elf32_External_Rela)); |
| bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| } |
| else |
| bfd_put_32 (output_bfd, 1, |
| htab->root.sgot->contents + off); |
| |
| htab->tls_ldm_got.offset |= 1; |
| } |
| |
| relocation = htab->root.sgot->output_offset + off - got_base; |
| |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| |
| break; |
| case R_NIOS2_TLS_GD16: |
| case R_NIOS2_TLS_IE16: |
| { |
| int indx; |
| char tls_type; |
| |
| if (htab->root.sgot == NULL) |
| abort (); |
| |
| indx = 0; |
| if (h != NULL) |
| { |
| bool dyn; |
| dyn = htab->root.dynamic_sections_created; |
| if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| bfd_link_pic (info), |
| h) |
| && (!bfd_link_pic (info) |
| || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| { |
| unresolved_reloc = false; |
| indx = h->dynindx; |
| } |
| off = h->got.offset; |
| tls_type = (((struct elf32_nios2_link_hash_entry *) h) |
| ->tls_type); |
| } |
| else |
| { |
| if (local_got_offsets == NULL) |
| abort (); |
| off = local_got_offsets[r_symndx]; |
| tls_type = (elf32_nios2_local_got_tls_type (input_bfd) |
| [r_symndx]); |
| } |
| |
| if (tls_type == GOT_UNKNOWN) |
| abort (); |
| |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bool need_relocs = false; |
| Elf_Internal_Rela outrel; |
| bfd_byte *loc = NULL; |
| int cur_off = off; |
| |
| /* The GOT entries have not been initialized yet. Do it |
| now, and emit any relocations. If both an IE GOT and a |
| GD GOT are necessary, we emit the GD first. */ |
| |
| if ((bfd_link_pic (info) || indx != 0) |
| && (h == NULL |
| || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| && !resolved_to_zero) |
| || h->root.type != bfd_link_hash_undefweak)) |
| { |
| need_relocs = true; |
| if (htab->root.srelgot == NULL) |
| abort (); |
| loc = htab->root.srelgot->contents; |
| loc += (htab->root.srelgot->reloc_count * |
| sizeof (Elf32_External_Rela)); |
| } |
| |
| if (tls_type & GOT_TLS_GD) |
| { |
| if (need_relocs) |
| { |
| outrel.r_addend = 0; |
| outrel.r_offset = (htab->root.sgot->output_section->vma |
| + htab->root.sgot->output_offset |
| + cur_off); |
| outrel.r_info = ELF32_R_INFO (indx, |
| R_NIOS2_TLS_DTPMOD); |
| |
| bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| loc); |
| htab->root.srelgot->reloc_count++; |
| loc += sizeof (Elf32_External_Rela); |
| |
| if (indx == 0) |
| bfd_put_32 (output_bfd, |
| (relocation - dtpoff_base (info) - |
| DTP_OFFSET), |
| htab->root.sgot->contents + cur_off + 4); |
| else |
| { |
| outrel.r_addend = 0; |
| outrel.r_info = ELF32_R_INFO (indx, |
| R_NIOS2_TLS_DTPREL); |
| outrel.r_offset += 4; |
| |
| bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| loc); |
| htab->root.srelgot->reloc_count++; |
| loc += sizeof (Elf32_External_Rela); |
| } |
| } |
| else |
| { |
| /* If we are not emitting relocations for a |
| general dynamic reference, then we must be in a |
| static link or an executable link with the |
| symbol binding locally. Mark it as belonging |
| to module 1, the executable. */ |
| bfd_put_32 (output_bfd, 1, |
| htab->root.sgot->contents + cur_off); |
| bfd_put_32 (output_bfd, (relocation - |
| dtpoff_base (info) - |
| DTP_OFFSET), |
| htab->root.sgot->contents + cur_off + 4); |
| } |
| |
| cur_off += 8; |
| } |
| |
| if (tls_type & GOT_TLS_IE) |
| { |
| if (need_relocs) |
| { |
| if (indx == 0) |
| outrel.r_addend = (relocation - |
| dtpoff_base (info)); |
| else |
| outrel.r_addend = 0; |
| outrel.r_offset = (htab->root.sgot->output_section->vma |
| + htab->root.sgot->output_offset |
| + cur_off); |
| outrel.r_info = ELF32_R_INFO (indx, |
| R_NIOS2_TLS_TPREL); |
| |
| bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| loc); |
| htab->root.srelgot->reloc_count++; |
| loc += sizeof (Elf32_External_Rela); |
| } |
| else |
| bfd_put_32 (output_bfd, (tpoff (info, relocation) |
| - TP_OFFSET), |
| htab->root.sgot->contents + cur_off); |
| cur_off += 4; |
| } |
| |
| if (h != NULL) |
| h->got.offset |= 1; |
| else |
| local_got_offsets[r_symndx] |= 1; |
| } |
| |
| if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16) |
| off += 8; |
| relocation = htab->root.sgot->output_offset + off - got_base; |
| |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| } |
| |
| break; |
| case R_NIOS2_TLS_LE16: |
| if (bfd_link_dll (info)) |
| { |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("%pB(%pA+%#" PRIx64 "): %s relocation not " |
| "permitted in shared object"), |
| input_bfd, input_section, |
| (uint64_t) rel->r_offset, howto->name); |
| return false; |
| } |
| else |
| relocation = tpoff (info, relocation) - TP_OFFSET; |
| |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| break; |
| |
| case R_NIOS2_BFD_RELOC_32: |
| if (bfd_link_pic (info) |
| && (input_section->flags & SEC_ALLOC) != 0 |
| && (h == NULL |
| || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| && !resolved_to_zero) |
| || h->root.type != bfd_link_hash_undefweak)) |
| { |
| Elf_Internal_Rela outrel; |
| bfd_byte *loc; |
| bool skip, relocate; |
| |
| /* 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 |
| && (!bfd_link_pic (info) |
| || !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; |
| relocate = true; |
| outrel.r_info = ELF32_R_INFO (0, R_NIOS2_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_reloca_out (output_bfd, &outrel, loc); |
| |
| /* This reloc will be computed at runtime, so there's no |
| need to do anything now, except for R_NIOS2_BFD_RELOC_32 |
| relocations that have been turned into |
| R_NIOS2_RELATIVE. */ |
| if (!relocate) |
| break; |
| } |
| |
| r = _bfd_final_link_relocate (howto, input_bfd, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| |
| case R_NIOS2_TLS_DTPREL: |
| relocation -= dtpoff_base (info); |
| /* Fall through. */ |
| |
| default: |
| r = _bfd_final_link_relocate (howto, input_bfd, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| break; |
| } |
| } |
| else |
| r = bfd_reloc_notsupported; |
| |
| if (r != bfd_reloc_ok) |
| { |
| 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 || *name == '\0') |
| name = bfd_section_name (sec); |
| } |
| |
| switch (r) |
| { |
| case bfd_reloc_overflow: |
| (*info->callbacks->reloc_overflow) (info, NULL, name, |
| howto->name, (bfd_vma) 0, |
| input_bfd, input_section, |
| rel->r_offset); |
| break; |
| |
| case bfd_reloc_undefined: |
| (*info->callbacks->undefined_symbol) (info, name, input_bfd, |
| input_section, |
| rel->r_offset, true); |
| break; |
| |
| case bfd_reloc_outofrange: |
| if (msg == NULL) |
| msg = _("relocation out of range"); |
| break; |
| |
| case bfd_reloc_notsupported: |
| if (msg == NULL) |
| msg = _("unsupported relocation"); |
| break; |
| |
| case bfd_reloc_dangerous: |
| if (msg == NULL) |
| msg = _("dangerous relocation"); |
| break; |
| |
| default: |
| if (msg == NULL) |
| msg = _("unknown error"); |
| break; |
| } |
| |
| if (msg) |
| { |
| (*info->callbacks->warning) (info, msg, name, input_bfd, |
| input_section, rel->r_offset); |
| free (msgbuf); |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| /* Implement elf-backend_section_flags: |
| Convert NIOS2 specific section flags to bfd internal section flags. */ |
| static bool |
| nios2_elf32_section_flags (const Elf_Internal_Shdr *hdr) |
| { |
| if (hdr->sh_flags & SHF_NIOS2_GPREL) |
| hdr->bfd_section->flags |= SEC_SMALL_DATA; |
| |
| return true; |
| } |
| |
| /* Implement elf_backend_fake_sections: |
| Set the correct type for an NIOS2 ELF section. We do this by the |
| section name, which is a hack, but ought to work. */ |
| static bool |
| nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| Elf_Internal_Shdr *hdr, asection *sec) |
| { |
| const char *name = bfd_section_name (sec); |
| |
| if ((sec->flags & SEC_SMALL_DATA) |
| || strcmp (name, ".sdata") == 0 |
| || strcmp (name, ".sbss") == 0 |
| || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0) |
| hdr->sh_flags |= SHF_NIOS2_GPREL; |
| |
| return true; |
| } |
| |
| /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up |
| shortcuts to them in our hash table. */ |
| static bool |
| create_got_section (bfd *dynobj, struct bfd_link_info *info) |
| { |
| struct elf32_nios2_link_hash_table *htab; |
| struct elf_link_hash_entry *h; |
| |
| htab = elf32_nios2_hash_table (info); |
| |
| if (! _bfd_elf_create_got_section (dynobj, info)) |
| return false; |
| |
| /* In order for the two loads in .PLTresolve to share the same %hiadj, |
| _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */ |
| if (!bfd_set_section_alignment (htab->root.sgotplt, 4)) |
| return false; |
| |
| /* The Nios II ABI specifies that GOT-relative relocations are relative |
| to the linker-created symbol _gp_got, rather than using |
| _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always |
| points to the base of the GOT while _gp_got may include a bias. */ |
| h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt, |
| "_gp_got"); |
| htab->h_gp_got = h; |
| if (h == NULL) |
| return false; |
| |
| return true; |
| } |
| |
| /* Implement elf_backend_create_dynamic_sections: |
| 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 bool |
| nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
| { |
| struct elf32_nios2_link_hash_table *htab; |
| |
| htab = elf32_nios2_hash_table (info); |
| if (!htab->root.sgot && !create_got_section (dynobj, info)) |
| return false; |
| |
| if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| return false; |
| |
| /* In order for the two loads in a shared object .PLTresolve to share the |
| same %hiadj, the start of the PLT (as well as the GOT) must be aligned |
| to a 16-byte boundary. This is because the addresses for these loads |
| include the -(.plt+4) PIC correction. */ |
| return bfd_set_section_alignment (htab->root.splt, 4); |
| } |
| |
| /* Implement elf_backend_copy_indirect_symbol: |
| Copy the extra info we tack onto an elf_link_hash_entry. */ |
| static void |
| nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *dir, |
| struct elf_link_hash_entry *ind) |
| { |
| struct elf32_nios2_link_hash_entry *edir, *eind; |
| |
| edir = (struct elf32_nios2_link_hash_entry *) dir; |
| eind = (struct elf32_nios2_link_hash_entry *) ind; |
| |
| if (ind->root.type == bfd_link_hash_indirect |
| && dir->got.refcount <= 0) |
| { |
| edir->tls_type = eind->tls_type; |
| eind->tls_type = GOT_UNKNOWN; |
| } |
| |
| edir->got_types_used |= eind->got_types_used; |
| |
| _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| } |
| |
| /* Set the right machine number for a NIOS2 ELF file. */ |
| |
| static bool |
| nios2_elf32_object_p (bfd *abfd) |
| { |
| unsigned long mach; |
| |
| mach = elf_elfheader (abfd)->e_flags; |
| |
| switch (mach) |
| { |
| default: |
| case EF_NIOS2_ARCH_R1: |
| bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r1); |
| break; |
| case EF_NIOS2_ARCH_R2: |
| bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r2); |
| break; |
| } |
| |
| return true; |
| } |
| |
| /* Implement elf_backend_check_relocs: |
| Look through the relocs for a section during the first phase. */ |
| static bool |
| nios2_elf32_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 elf32_nios2_link_hash_table *htab; |
| asection *sreloc = NULL; |
| bfd_signed_vma *local_got_refcounts; |
| |
| if (bfd_link_relocatable (info)) |
| return true; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| local_got_refcounts = elf_local_got_refcounts (abfd); |
| |
| htab = elf32_nios2_hash_table (info); |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| unsigned int r_type; |
| struct elf_link_hash_entry *h; |
| unsigned long r_symndx; |
| |
| 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; |
| } |
| |
| r_type = ELF32_R_TYPE (rel->r_info); |
| |
| switch (r_type) |
| { |
| case R_NIOS2_GOT16: |
| case R_NIOS2_GOT_LO: |
| case R_NIOS2_GOT_HA: |
| case R_NIOS2_CALL16: |
| case R_NIOS2_CALL_LO: |
| case R_NIOS2_CALL_HA: |
| case R_NIOS2_TLS_GD16: |
| case R_NIOS2_TLS_IE16: |
| /* This symbol requires a global offset table entry. */ |
| { |
| int tls_type, old_tls_type; |
| |
| switch (r_type) |
| { |
| default: |
| case R_NIOS2_GOT16: |
| case R_NIOS2_GOT_LO: |
| case R_NIOS2_GOT_HA: |
| case R_NIOS2_CALL16: |
| case R_NIOS2_CALL_LO: |
| case R_NIOS2_CALL_HA: |
| tls_type = GOT_NORMAL; |
| break; |
| case R_NIOS2_TLS_GD16: |
| tls_type = GOT_TLS_GD; |
| break; |
| case R_NIOS2_TLS_IE16: |
| tls_type = GOT_TLS_IE; |
| break; |
| } |
| |
| if (h != NULL) |
| { |
| struct elf32_nios2_link_hash_entry *eh |
| = (struct elf32_nios2_link_hash_entry *)h; |
| h->got.refcount++; |
| old_tls_type = elf32_nios2_hash_entry(h)->tls_type; |
| if (r_type == R_NIOS2_CALL16 |
| || r_type == R_NIOS2_CALL_LO |
| || r_type == R_NIOS2_CALL_HA) |
| { |
| /* Make sure a plt entry is created for this symbol if |
| it turns out to be a function defined by a dynamic |
| object. */ |
| h->plt.refcount++; |
| h->needs_plt = 1; |
| h->type = STT_FUNC; |
| eh->got_types_used |= CALL_USED; |
| } |
| else |
| eh->got_types_used |= GOT_USED; |
| } |
| else |
| { |
| /* This is a global offset table entry for a local symbol. */ |
| if (local_got_refcounts == NULL) |
| { |
| bfd_size_type size; |
| |
| size = symtab_hdr->sh_info; |
| size *= (sizeof (bfd_signed_vma) + sizeof (char)); |
| local_got_refcounts |
| = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); |
| if (local_got_refcounts == NULL) |
| return false; |
| elf_local_got_refcounts (abfd) = local_got_refcounts; |
| elf32_nios2_local_got_tls_type (abfd) |
| = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| } |
| local_got_refcounts[r_symndx]++; |
| old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx]; |
| } |
| |
| /* We will already have issued an error message if there is a |
| TLS / non-TLS mismatch, based on the symbol type. We don't |
| support any linker relaxations. So just combine any TLS |
| types needed. */ |
| if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL |
| && tls_type != GOT_NORMAL) |
| tls_type |= old_tls_type; |
| |
| if (old_tls_type != tls_type) |
| { |
| if (h != NULL) |
| elf32_nios2_hash_entry (h)->tls_type = tls_type; |
| else |
| elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| } |
| } |
| make_got: |
| if (htab->root.sgot == NULL) |
| { |
| if (htab->root.dynobj == NULL) |
| htab->root.dynobj = abfd; |
| if (!create_got_section (htab->root.dynobj, info)) |
| return false; |
| } |
| break; |
| |
| case R_NIOS2_TLS_LDM16: |
| htab->tls_ldm_got.refcount++; |
| goto make_got; |
| |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_NIOS2_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_NIOS2_GNU_VTENTRY: |
| if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| return false; |
| break; |
| |
| case R_NIOS2_BFD_RELOC_32: |
| case R_NIOS2_CALL26: |
| case R_NIOS2_CALL26_NOAT: |
| case R_NIOS2_HIADJ16: |
| case R_NIOS2_LO16: |
| |
| 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. */ |
| if (!bfd_link_pic (info)) |
| h->non_got_ref = 1; |
| |
| /* Make sure a plt entry is created for this symbol if it |
| turns out to be a function defined by a dynamic object. */ |
| h->plt.refcount++; |
| |
| if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT) |
| h->needs_plt = 1; |
| } |
| |
| /* If we are creating a shared library, we need to copy the |
| reloc into the shared library. */ |
| if (bfd_link_pic (info) |
| && (sec->flags & SEC_ALLOC) != 0 |
| && (r_type == R_NIOS2_BFD_RELOC_32 |
| || (h != NULL && ! h->needs_plt |
| && (! SYMBOLIC_BIND (info, h) || ! h->def_regular)))) |
| { |
| struct elf_dyn_relocs *p; |
| struct elf_dyn_relocs **head; |
| |
| /* When creating a shared object, we must copy these |
| reloc types into the output file. We create a reloc |
| section in dynobj and make room for this reloc. */ |
| if (sreloc == NULL) |
| { |
| if (htab->root.dynobj == NULL) |
| htab->root.dynobj = abfd; |
| |
| sreloc = _bfd_elf_make_dynamic_reloc_section |
| (sec, htab->root.dynobj, 2, abfd, true); |
| if (sreloc == NULL) |
| return false; |
| } |
| |
| /* If this is a global symbol, we count the number of |
| relocations we need for this symbol. */ |
| if (h != NULL) |
| head = &h->dyn_relocs; |
| else |
| { |
| /* Track dynamic relocs needed for local syms too. |
| We really need local syms available to do this |
| easily. Oh well. */ |
| |
| asection *s; |
| void *vpp; |
| Elf_Internal_Sym *isym; |
| |
| isym = bfd_sym_from_r_symndx (&htab->root.sym_cache, |
| abfd, r_symndx); |
| if (isym == NULL) |
| return false; |
| |
| s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| if (s == NULL) |
| s = sec; |
| |
| vpp = &elf_section_data (s)->local_dynrel; |
| head = (struct elf_dyn_relocs **) vpp; |
| } |
| |
| p = *head; |
| if (p == NULL || p->sec != sec) |
| { |
| size_t amt = sizeof *p; |
| p = ((struct elf_dyn_relocs *) |
| bfd_alloc (htab->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; |
| |
| } |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| |
| /* Implement elf_backend_gc_mark_hook: |
| Return the section that should be marked against GC for a given |
| relocation. */ |
| static asection * |
| nios2_elf32_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_NIOS2_GNU_VTINHERIT: |
| case R_NIOS2_GNU_VTENTRY: |
| return NULL; |
| } |
| return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| } |
| |
| /* Implement elf_backend_finish_dynamic_symbols: |
| Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| static bool |
| nios2_elf32_finish_dynamic_symbol (bfd *output_bfd, |
| struct bfd_link_info *info, |
| struct elf_link_hash_entry *h, |
| Elf_Internal_Sym *sym) |
| { |
| struct elf32_nios2_link_hash_table *htab; |
| struct elf32_nios2_link_hash_entry *eh |
| = (struct elf32_nios2_link_hash_entry *)h; |
| int use_plt; |
| |
| htab = elf32_nios2_hash_table (info); |
| |
| if (h->plt.offset != (bfd_vma) -1) |
| { |
| asection *splt; |
| asection *sgotplt; |
| asection *srela; |
| bfd_vma plt_index; |
| bfd_vma got_offset; |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| bfd_vma got_address; |
| |
| /* This symbol has an entry in the procedure linkage table. Set |
| it up. */ |
| BFD_ASSERT (h->dynindx != -1); |
| splt = htab->root.splt; |
| sgotplt = htab->root.sgotplt; |
| srela = htab->root.srelplt; |
| BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL); |
| |
| /* Emit the PLT entry. */ |
| if (bfd_link_pic (info)) |
| { |
| nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset, |
| 3); |
| plt_index = (h->plt.offset - 24) / 12; |
| got_offset = (plt_index + 3) * 4; |
| nios2_elf32_install_imm16 (splt, h->plt.offset, |
| hiadj(plt_index * 4)); |
| nios2_elf32_install_imm16 (splt, h->plt.offset + 4, |
| (plt_index * 4) & 0xffff); |
| nios2_elf32_install_imm16 (splt, h->plt.offset + 8, |
| 0xfff4 - h->plt.offset); |
| got_address = (sgotplt->output_section->vma + sgotplt->output_offset |
| + got_offset); |
| |
| /* Fill in the entry in the global offset table. There are no |
| res_n slots for a shared object PLT, instead the .got.plt entries |
| point to the PLT entries. */ |
| bfd_put_32 (output_bfd, |
| splt->output_section->vma + splt->output_offset |
| + h->plt.offset, sgotplt->contents + got_offset); |
| } |
| else |
| { |
| plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12; |
| got_offset = (plt_index + 3) * 4; |
| |
| nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3); |
| got_address = (sgotplt->output_section->vma + sgotplt->output_offset |
| + got_offset); |
| nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address)); |
| nios2_elf32_install_imm16 (splt, h->plt.offset + 4, |
| got_address & 0xffff); |
| |
| /* Fill in the entry in the global offset table. */ |
| bfd_put_32 (output_bfd, |
| splt->output_section->vma + splt->output_offset |
| + plt_index * 4, sgotplt->contents + got_offset); |
| } |
| |
| /* Fill in the entry in the .rela.plt section. */ |
| rela.r_offset = got_address; |
| rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT); |
| rela.r_addend = 0; |
| loc = srela->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. */ |
| sym->st_shndx = SHN_UNDEF; |
| /* If the symbol is weak, we do need to clear the value. |
| Otherwise, the PLT entry would provide a definition for |
| the symbol even if the symbol wasn't defined anywhere, |
| and so the symbol would never be NULL. */ |
| if (!h->ref_regular_nonweak) |
| sym->st_value = 0; |
| } |
| } |
| |
| use_plt = (eh->got_types_used == CALL_USED |
| && h->plt.offset != (bfd_vma) -1); |
| |
| if (!use_plt && h->got.offset != (bfd_vma) -1 |
| && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 |
| && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) |
| { |
| asection *sgot; |
| asection *srela; |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| bfd_vma offset; |
| |
| /* This symbol has an entry in the global offset table. Set it |
| up. */ |
| sgot = htab->root.sgot; |
| srela = htab->root.srelgot; |
| BFD_ASSERT (sgot != NULL && srela != NULL); |
| |
| offset = (h->got.offset & ~(bfd_vma) 1); |
| rela.r_offset = (sgot->output_section->vma |
| + sgot->output_offset + offset); |
| |
| /* 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 (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) |
| { |
| rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); |
| rela.r_addend = bfd_get_signed_32 (output_bfd, |
| (sgot->contents + offset)); |
| bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); |
| } |
| else |
| { |
| bfd_put_32 (output_bfd, (bfd_vma) 0, |
| sgot->contents + offset); |
| rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_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); |
| } |
| |
| if (use_plt && h->got.offset != (bfd_vma) -1) |
| { |
| bfd_vma offset = (h->got.offset & ~(bfd_vma) 1); |
| asection *sgot = htab->root.sgot; |
| asection *splt = htab->root.splt; |
| bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset |
| + h->plt.offset), |
| sgot->contents + offset); |
| } |
| |
| if (h->needs_copy) |
| { |
| asection *s; |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| /* This symbol 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)); |
| |
| 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_NIOS2_COPY); |
| rela.r_addend = 0; |
| if (h->root.u.def.section == htab->root.sdynrelro) |
| s = htab->root.sreldynrelro; |
| else |
| s = htab->root.srelbss; |
| BFD_ASSERT (s != NULL); |
| loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */ |
| if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| || h == htab->root.hgot |
| || h == htab->h_gp_got) |
| sym->st_shndx = SHN_ABS; |
| |
| return true; |
| } |
| |
| /* Implement elf_backend_finish_dynamic_sections. */ |
| static bool |
| nios2_elf32_finish_dynamic_sections (bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| asection *sgotplt; |
| asection *sdyn; |
| struct elf32_nios2_link_hash_table *htab; |
| |
| htab = elf32_nios2_hash_table (info); |
| sgotplt = htab->root.sgotplt; |
| sdyn = NULL; |
| |
| if (htab->root.dynamic_sections_created) |
| { |
| asection *splt; |
| Elf32_External_Dyn *dyncon, *dynconend; |
| |
| splt = htab->root.splt; |
| sdyn = bfd_get_linker_section (htab->root.dynobj, ".dynamic"); |
| BFD_ASSERT (splt != NULL && sdyn != NULL && sgotplt != 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 (htab->root.dynobj, dyncon, &dyn); |
| |
| switch (dyn.d_tag) |
| { |
| default: |
| break; |
| |
| case DT_PLTGOT: |
| s = htab->root.sgotplt; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| break; |
| |
| case DT_JMPREL: |
| s = htab->root.srelplt; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| break; |
| |
| case DT_PLTRELSZ: |
| s = htab->root.srelplt; |
| dyn.d_un.d_val = s->size; |
| bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| break; |
| |
| case DT_NIOS2_GP: |
| s = htab->root.sgotplt; |
| dyn.d_un.d_ptr |
| = s->output_section->vma + s->output_offset + 0x7ff0; |
| bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| break; |
| } |
| } |
| |
| /* Fill in the first entry in the procedure linkage table. */ |
| if (splt->size > 0) |
| { |
| bfd_vma got_address = (sgotplt->output_section->vma |
| + sgotplt->output_offset); |
| if (bfd_link_pic (info)) |
| { |
| bfd_vma got_pcrel = got_address - (splt->output_section->vma |
| + splt->output_offset); |
| /* Both GOT and PLT must be aligned to a 16-byte boundary |
| for the two loads to share the %hiadj part. The 4-byte |
| offset for nextpc is accounted for in the %lo offsets |
| on the loads. */ |
| BFD_ASSERT ((got_pcrel & 0xf) == 0); |
| nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6); |
| nios2_elf32_install_imm16 (splt, 4, hiadj (got_pcrel)); |
| nios2_elf32_install_imm16 (splt, 12, got_pcrel & 0xffff); |
| nios2_elf32_install_imm16 (splt, 16, (got_pcrel + 4) & 0xffff); |
| } |
| else |
| { |
| /* Divide by 4 here, not 3 because we already corrected for the |
| res_N branches. */ |
| bfd_vma res_size = (splt->size - 28) / 4; |
| bfd_vma res_start = (splt->output_section->vma |
| + splt->output_offset); |
| bfd_vma res_offset; |
| |
| for (res_offset = 0; res_offset < res_size; res_offset += 4) |
| bfd_put_32 (output_bfd, |
| 6 | ((res_size - (res_offset + 4)) << 6), |
| splt->contents + res_offset); |
| |
| /* The GOT must be aligned to a 16-byte boundary for the |
| two loads to share the same %hiadj part. */ |
| BFD_ASSERT ((got_address & 0xf) == 0); |
| |
| nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7); |
| nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start)); |
| nios2_elf32_install_imm16 (splt, res_size + 4, |
| res_start & 0xffff); |
| nios2_elf32_install_imm16 (splt, res_size + 12, |
| hiadj (got_address)); |
| nios2_elf32_install_imm16 (splt, res_size + 16, |
| (got_address + 4) & 0xffff); |
| nios2_elf32_install_imm16 (splt, res_size + 20, |
| (got_address + 8) & 0xffff); |
| } |
| } |
| } |
| |
| /* Fill in the first three entries in the global offset table. */ |
| if (sgotplt != NULL && sgotplt->size > 0) |
| { |
| if (sdyn == NULL) |
| bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents); |
| else |
| bfd_put_32 (output_bfd, |
| sdyn->output_section->vma + sdyn->output_offset, |
| sgotplt->contents); |
| bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4); |
| bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8); |
| |
| if (sgotplt->output_section != bfd_abs_section_ptr) |
| elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4; |
| } |
| |
| return true; |
| } |
| |
| /* Implement elf_backend_adjust_dynamic_symbol: |
| 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 bool |
| nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *h) |
| { |
| struct elf32_nios2_link_hash_table *htab; |
| bfd *dynobj; |
| asection *s, *srel; |
| unsigned align2; |
| |
| htab = elf32_nios2_hash_table (info); |
| dynobj = htab->root.dynobj; |
| |
| /* Make sure we know what is going on here. */ |
| BFD_ASSERT (dynobj != NULL |
| && (h->needs_plt |
| || h->is_weakalias |
| || (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 (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 PLT 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 PCREL reloc instead. */ |
| h->plt.offset = (bfd_vma) -1; |
| h->needs_plt = 0; |
| } |
| |
| return true; |
| } |
| |
| /* Reinitialize the plt offset now that it is not used as a reference |
| count any more. */ |
| h->plt.offset = (bfd_vma) -1; |
| |
| /* If this is a weak symbol, and there is a real definition, the |
| processor independent code will have arranged for us to see the |
| real definition first, and we can just use the same value. */ |
| if (h->is_weakalias) |
| { |
| struct elf_link_hash_entry *def = weakdef (h); |
| BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| h->root.u.def.section = def->root.u.def.section; |
| h->root.u.def.value = def->root.u.def.value; |
| return true; |
| } |
| |
| /* If there are no non-GOT references, we do not need a copy |
| relocation. */ |
| if (!h->non_got_ref) |
| return true; |
| |
| /* This is a reference to a symbol defined by a dynamic object which |
| is not a function. |
| If we are creating a shared library, we must presume that the |
| only references to the symbol are via the global offset table. |
| For such cases we need not do anything here; the relocations will |
| be handled correctly by relocate_section. */ |
| if (bfd_link_pic (info)) |
| return true; |
| |
| if (h->size == 0) |
| { |
| _bfd_error_handler (_("dynamic variable `%s' is zero size"), |
| h->root.root.string); |
| 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. */ |
| /* We must generate a R_NIOS2_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_READONLY) != 0) |
| { |
| s = htab->root.sdynrelro; |
| srel = htab->root.sreldynrelro; |
| } |
| else |
| { |
| s = htab->root.sdynbss; |
| srel = htab->root.srelbss; |
| } |
| if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| { |
| srel->size += sizeof (Elf32_External_Rela); |
| h->needs_copy = 1; |
| } |
| |
| align2 = bfd_log2 (h->size); |
| if (align2 > h->root.u.def.section->alignment_power) |
| align2 = h->root.u.def.section->alignment_power; |
| |
| /* Align dynbss. */ |
| s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2); |
| if (align2 > bfd_section_alignment (s) |
| && !bfd_set_section_alignment (s, align2)) |
| return false; |
| |
| /* Define the symbol as being at this point in the section. */ |
| h->root.u.def.section = s; |
| h->root.u.def.value = s->size; |
| |
| /* Increment the section size to make room for the symbol. */ |
| s->size += h->size; |
| |
| return true; |
| } |
| |
| /* Worker function for nios2_elf32_size_dynamic_sections. */ |
| static bool |
| adjust_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| { |
| struct bfd_link_info *info; |
| struct elf32_nios2_link_hash_table *htab; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return true; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| /* When warning symbols are created, they **replace** the "real" |
| entry in the hash table, thus we never get to see the real |
| symbol in a hash traversal. So look at it now. */ |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = elf32_nios2_hash_table (info); |
| |
| if (h->plt.offset != (bfd_vma)-1) |
| h->plt.offset += htab->res_n_size; |
| if (htab->root.splt == h->root.u.def.section) |
| h->root.u.def.value += htab->res_n_size; |
| |
| return true; |
| } |
| |
| /* Another worker function for nios2_elf32_size_dynamic_sections. |
| Allocate space in .plt, .got and associated reloc sections for |
| dynamic relocs. */ |
| static bool |
| allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| { |
| struct bfd_link_info *info; |
| struct elf32_nios2_link_hash_table *htab; |
| struct elf32_nios2_link_hash_entry *eh; |
| struct elf_dyn_relocs *p; |
| int use_plt; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return true; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| /* When warning symbols are created, they **replace** the "real" |
| entry in the hash table, thus we never get to see the real |
| symbol in a hash traversal. So look at it now. */ |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = elf32_nios2_hash_table (info); |
| |
| 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 |
| && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| |
| if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) |
| { |
| asection *s = htab->root.splt; |
| |
| /* Allocate room for the header. */ |
| if (s->size == 0) |
| { |
| if (bfd_link_pic (info)) |
| s->size = 24; |
| else |
| s->size = 28; |
| } |
| |
| h->plt.offset = s->size; |
| |
| /* If this symbol is not defined in a regular file, and we are |
| not generating a shared library, then set the symbol to this |
| location in the .plt. This is required to make function |
| pointers compare as equal between the normal executable and |
| the shared library. */ |
| if (! bfd_link_pic (info) |
| && !h->def_regular) |
| { |
| h->root.u.def.section = s; |
| h->root.u.def.value = h->plt.offset; |
| } |
| |
| /* Make room for this entry. */ |
| s->size += 12; |
| |
| /* We also need to make an entry in the .rela.plt section. */ |
| htab->root.srelplt->size += sizeof (Elf32_External_Rela); |
| |
| /* And the .got.plt section. */ |
| htab->root.sgotplt->size += 4; |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->needs_plt = 0; |
| } |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->needs_plt = 0; |
| } |
| |
| eh = (struct elf32_nios2_link_hash_entry *) h; |
| use_plt = (eh->got_types_used == CALL_USED |
| && h->plt.offset != (bfd_vma) -1); |
| |
| if (h->got.refcount > 0) |
| { |
| asection *s; |
| bool dyn; |
| int tls_type = eh->tls_type; |
| int indx; |
| |
| /* 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 |
| && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| |
| s = htab->root.sgot; |
| h->got.offset = s->size; |
| |
| if (tls_type == GOT_UNKNOWN) |
| abort (); |
| |
| if (tls_type == GOT_NORMAL) |
| /* Non-TLS symbols need one GOT slot. */ |
| s->size += 4; |
| else |
| { |
| if (tls_type & GOT_TLS_GD) |
| /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */ |
| s->size += 8; |
| if (tls_type & GOT_TLS_IE) |
| /* R_NIOS2_TLS_IE16 needs one GOT slot. */ |
| s->size += 4; |
| } |
| |
| dyn = htab->root.dynamic_sections_created; |
| |
| indx = 0; |
| if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
| && (!bfd_link_pic (info) |
| || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| indx = h->dynindx; |
| |
| if (tls_type != GOT_NORMAL |
| && (bfd_link_pic (info) || indx != 0) |
| && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak)) |
| { |
| if (tls_type & GOT_TLS_IE) |
| htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| |
| if (tls_type & GOT_TLS_GD) |
| htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| |
| if ((tls_type & GOT_TLS_GD) && indx != 0) |
| htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| } |
| else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak) |
| && !use_plt |
| && (bfd_link_pic (info) |
| || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| } |
| else |
| h->got.offset = (bfd_vma) -1; |
| |
| if (h->dyn_relocs == NULL) |
| return true; |
| |
| /* In the shared -Bsymbolic case, discard space allocated for |
| dynamic pc-relative relocs against symbols which turn out to be |
| defined in regular objects. For the normal shared case, discard |
| space for pc-relative relocs that have become local due to symbol |
| visibility changes. */ |
| |
| if (bfd_link_pic (info)) |
| { |
| if (h->def_regular |
| && (h->forced_local || SYMBOLIC_BIND (info, h))) |
| { |
| struct elf_dyn_relocs **pp; |
| |
| for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
| { |
| p->count -= p->pc_count; |
| p->pc_count = 0; |
| if (p->count == 0) |
| *pp = p->next; |
| else |
| pp = &p->next; |
| } |
| } |
| |
| /* Also discard relocs on undefined weak syms with non-default |
| visibility. */ |
| if (h->dyn_relocs != NULL |
| && h->root.type == bfd_link_hash_undefweak) |
| { |
| if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| h->dyn_relocs = NULL; |
| |
| /* Make sure undefined weak symbols are output as a dynamic |
| symbol in PIEs. */ |
| else if (h->dynindx == -1 |
| && !h->forced_local |
| && !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 |
| && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| |
| /* If that succeeded, we know we'll be keeping all the |
| relocs. */ |
| if (h->dynindx != -1) |
| goto keep; |
| } |
| |
| h->dyn_relocs = NULL; |
| |
| keep: ; |
| } |
| |
| /* Finally, allocate space. */ |
| for (p = h->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *sreloc = elf_section_data (p->sec)->sreloc; |
| sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| } |
| |
| return true; |
| } |
| |
| /* Implement elf_backend_size_dynamic_sections: |
| Set the sizes of the dynamic sections. */ |
| static bool |
| nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info) |
| { |
| bfd *dynobj; |
| asection *s; |
| bool relocs; |
| bfd *ibfd; |
| struct elf32_nios2_link_hash_table *htab; |
| |
| htab = elf32_nios2_hash_table (info); |
| dynobj = htab->root.dynobj; |
| BFD_ASSERT (dynobj != NULL); |
| |
| htab->res_n_size = 0; |
| if (htab->root.dynamic_sections_created) |
| { |
| /* Set the contents of the .interp section to the interpreter. */ |
| if (bfd_link_executable (info) && !info->nointerp) |
| { |
| s = bfd_get_linker_section (dynobj, ".interp"); |
| BFD_ASSERT (s != NULL); |
| s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| } |
| } |
| else |
| { |
| /* We may have created entries in the .rela.got section. |
| However, if we are not creating the dynamic sections, we will |
| not actually use these entries. Reset the size of .rela.got, |
| which will cause it to get stripped from the output file |
| below. */ |
| s = htab->root.srelgot; |
| if (s != NULL) |
| s->size = 0; |
| } |
| |
| /* Set up .got offsets for local syms, and space for local dynamic |
| relocs. */ |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| { |
| bfd_signed_vma *local_got; |
| bfd_signed_vma *end_local_got; |
| char *local_tls_type; |
| bfd_size_type locsymcount; |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *srel; |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 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) |
| { |
| srel = elf_section_data (p->sec)->sreloc; |
| srel->size += p->count * sizeof (Elf32_External_Rela); |
| } |
| } |
| } |
| |
| 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; |
| local_tls_type = elf32_nios2_local_got_tls_type (ibfd); |
| s = htab->root.sgot; |
| srel = htab->root.srelgot; |
| for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
| { |
| if (*local_got > 0) |
| { |
| *local_got = s->size; |
| if (*local_tls_type & GOT_TLS_GD) |
| /* TLS_GD relocs need an 8-byte structure in the GOT. */ |
| s->size += 8; |
| if (*local_tls_type & GOT_TLS_IE) |
| s->size += 4; |
| if (*local_tls_type == GOT_NORMAL) |
| s->size += 4; |
| |
| if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD) |
| srel->size += sizeof (Elf32_External_Rela); |
| } |
| else |
| *local_got = (bfd_vma) -1; |
| } |
| } |
| |
| if (htab->tls_ldm_got.refcount > 0) |
| { |
| /* Allocate two GOT entries and one dynamic relocation (if necessary) |
| for R_NIOS2_TLS_LDM16 relocations. */ |
| htab->tls_ldm_got.offset = htab->root.sgot->size; |
| htab->root.sgot->size += 8; |
| if (bfd_link_pic (info)) |
| htab->root.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->root, allocate_dynrelocs, info); |
| |
| if (htab->root.dynamic_sections_created) |
| { |
| /* If the .got section is more than 0x8000 bytes, we add |
| 0x8000 to the value of _gp_got, so that 16-bit relocations |
| have a greater chance of working. */ |
| if (htab->root.sgot->size >= 0x8000 |
| && htab->h_gp_got->root.u.def.value == 0) |
| htab->h_gp_got->root.u.def.value = 0x8000; |
| } |
| |
| /* The check_relocs and adjust_dynamic_symbol entry points have |
| determined the sizes of the various dynamic sections. Allocate |
| memory for them. */ |
| relocs = false; |
| for (s = dynobj->sections; s != NULL; s = s->next) |
| { |
| const char *name; |
| |
| if ((s->flags & SEC_LINKER_CREATED) == 0) |
| continue; |
| |
| /* It's OK to base decisions on the section name, because none |
| of the dynobj section names depend upon the input files. */ |
| name = bfd_section_name (s); |
| |
| if (startswith (name, ".rela")) |
| { |
| if (s->size != 0) |
| { |
| if (s != htab->root.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 if (s == htab->root.splt) |
| { |
| /* Correct for the number of res_N branches. */ |
| if (s->size != 0 && !bfd_link_pic (info)) |
| { |
| htab->res_n_size = (s->size - 28) / 3; |
| s->size += htab->res_n_size; |
| } |
| } |
| else if (s != htab->sbss |
| && s != htab->root.sgot |
| && s != htab->root.sgotplt |
| && s != htab->root.sdynbss |
| && s != htab->root.sdynrelro) |
| /* It's not one of our sections, so don't allocate space. */ |
| continue; |
| |
| if (s->size == 0) |
| { |
| s->flags |= SEC_EXCLUDE; |
| continue; |
| } |
| |
| if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| continue; |
| |
| /* Allocate memory for the section contents. */ |
| s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| if (s->contents == NULL) |
| return false; |
| } |
| |
| /* Adjust dynamic symbols that point to the plt to account for the |
| now-known number of resN slots. */ |
| if (htab->res_n_size) |
| elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info); |
| |
| return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs); |
| } |
| |
| /* Free the derived linker hash table. */ |
| static void |
| nios2_elf32_link_hash_table_free (bfd *obfd) |
| { |
| struct elf32_nios2_link_hash_table *htab |
| = (struct elf32_nios2_link_hash_table *) obfd->link.hash; |
| |
| bfd_hash_table_free (&htab->bstab); |
| _bfd_elf_link_hash_table_free (obfd); |
| } |
| |
| /* Implement bfd_elf32_bfd_link_hash_table_create. */ |
| static struct bfd_link_hash_table * |
| nios2_elf32_link_hash_table_create (bfd *abfd) |
| { |
| struct elf32_nios2_link_hash_table *ret; |
| size_t amt = sizeof (struct elf32_nios2_link_hash_table); |
| |
| ret = bfd_zmalloc (amt); |
| if (ret == NULL) |
| return NULL; |
| |
| if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| link_hash_newfunc, |
| sizeof (struct |
| elf32_nios2_link_hash_entry), |
| NIOS2_ELF_DATA)) |
| { |
| free (ret); |
| return NULL; |
| } |
| |
| /* Init the stub hash table too. */ |
| if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc, |
| sizeof (struct elf32_nios2_stub_hash_entry))) |
| { |
| _bfd_elf_link_hash_table_free (abfd); |
| return NULL; |
| } |
| ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free; |
| |
| return &ret->root.root; |
| } |
| |
| /* Implement elf_backend_reloc_type_class. */ |
| static enum elf_reloc_type_class |
| nios2_elf32_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_NIOS2_RELATIVE: |
| return reloc_class_relative; |
| case R_NIOS2_JUMP_SLOT: |
| return reloc_class_plt; |
| case R_NIOS2_COPY: |
| return reloc_class_copy; |
| default: |
| return reloc_class_normal; |
| } |
| } |
| |
| /* Return 1 if target is one of ours. */ |
| static bool |
| is_nios2_elf_target (const struct bfd_target *targ) |
| { |
| return (targ == &nios2_elf32_le_vec |
| || targ == &nios2_elf32_be_vec); |
| } |
| |
| /* Implement elf_backend_add_symbol_hook. |
| This hook is called by the linker when adding symbols from an object |
| file. We use it to put .comm items in .sbss, and not .bss. */ |
| static bool |
| nios2_elf_add_symbol_hook (bfd *abfd, |
| struct bfd_link_info *info, |
| Elf_Internal_Sym *sym, |
| const char **namep ATTRIBUTE_UNUSED, |
| flagword *flagsp ATTRIBUTE_UNUSED, |
| asection **secp, |
| bfd_vma *valp) |
| { |
| if (sym->st_shndx == SHN_COMMON |
| && !bfd_link_relocatable (info) |
| && sym->st_size <= elf_gp_size (abfd) |
| && is_nios2_elf_target (info->output_bfd->xvec)) |
| { |
| /* Common symbols less than or equal to -G nn bytes are automatically |
| put into .sbss. */ |
| struct elf32_nios2_link_hash_table *htab; |
| |
| htab = elf32_nios2_hash_table (info); |
| if (htab->sbss == NULL) |
| { |
| flagword flags = SEC_IS_COMMON | SEC_SMALL_DATA | SEC_LINKER_CREATED; |
| |
| if (htab->root.dynobj == NULL) |
| htab->root.dynobj = abfd; |
| |
| htab->sbss = bfd_make_section_anyway_with_flags (htab->root.dynobj, |
| ".sbss", flags); |
| if (htab->sbss == NULL) |
| return false; |
| } |
| |
| *secp = htab->sbss; |
| *valp = sym->st_size; |
| } |
| |
| return true; |
| } |
| |
| /* Implement elf_backend_can_make_relative_eh_frame: |
| Decide whether to attempt to turn absptr or lsda encodings in |
| shared libraries into pcrel within the given input section. */ |
| static bool |
| nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info |
| ATTRIBUTE_UNUSED, |
| asection *eh_frame_section |
| ATTRIBUTE_UNUSED) |
| { |
| /* We can't use PC-relative encodings in the .eh_frame section. */ |
| return false; |
| } |
| |
| /* Implement elf_backend_special_sections. */ |
| const struct bfd_elf_special_section elf32_nios2_special_sections[] = |
| { |
| { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, |
| SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, |
| { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, |
| SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, |
| { NULL, 0, 0, 0, 0 } |
| }; |
| |
| #define ELF_ARCH bfd_arch_nios2 |
| #define ELF_TARGET_ID NIOS2_ELF_DATA |
| #define ELF_MACHINE_CODE EM_ALTERA_NIOS2 |
| |
| /* The Nios II MMU uses a 4K page size. */ |
| |
| #define ELF_MAXPAGESIZE 0x1000 |
| |
| #define bfd_elf32_bfd_link_hash_table_create \ |
| nios2_elf32_link_hash_table_create |
| |
| #define bfd_elf32_bfd_merge_private_bfd_data \ |
| nios2_elf32_merge_private_bfd_data |
| |
| /* Relocation table lookup macros. */ |
| |
| #define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup |
| #define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup |
| |
| /* JUMP_TABLE_LINK macros. */ |
| |
| /* elf_info_to_howto (using RELA relocations). */ |
| |
| #define elf_info_to_howto nios2_elf32_info_to_howto |
| |
| /* elf backend functions. */ |
| |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_can_refcount 1 |
| #define elf_backend_plt_readonly 1 |
| #define elf_backend_want_got_plt 1 |
| #define elf_backend_want_dynrelro 1 |
| #define elf_backend_rela_normal 1 |
| #define elf_backend_dtrel_excludes_plt 1 |
| |
| #define elf_backend_relocate_section nios2_elf32_relocate_section |
| #define elf_backend_section_flags nios2_elf32_section_flags |
| #define elf_backend_fake_sections nios2_elf32_fake_sections |
| #define elf_backend_check_relocs nios2_elf32_check_relocs |
| |
| #define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook |
| #define elf_backend_create_dynamic_sections \ |
| nios2_elf32_create_dynamic_sections |
| #define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol |
| #define elf_backend_finish_dynamic_sections \ |
| nios2_elf32_finish_dynamic_sections |
| #define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol |
| #define elf_backend_reloc_type_class nios2_elf32_reloc_type_class |
| #define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections |
| #define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook |
| #define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol |
| #define elf_backend_object_p nios2_elf32_object_p |
| |
| #define elf_backend_grok_prstatus nios2_grok_prstatus |
| #define elf_backend_grok_psinfo nios2_grok_psinfo |
| |
| #undef elf_backend_can_make_relative_eh_frame |
| #define elf_backend_can_make_relative_eh_frame \ |
| nios2_elf32_can_make_relative_eh_frame |
| |
| #define elf_backend_special_sections elf32_nios2_special_sections |
| |
| #define TARGET_LITTLE_SYM nios2_elf32_le_vec |
| #define TARGET_LITTLE_NAME "elf32-littlenios2" |
| #define TARGET_BIG_SYM nios2_elf32_be_vec |
| #define TARGET_BIG_NAME "elf32-bignios2" |
| |
| #define elf_backend_got_header_size 12 |
| #define elf_backend_default_execstack 0 |
| |
| #include "elf32-target.h" |
