6158 lines
184 KiB
C
6158 lines
184 KiB
C
/* PowerPC64-specific support for 64-bit ELF.
|
||
Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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Written by Linus Nordberg, Swox AB <info@swox.com>,
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based on elf32-ppc.c by Ian Lance Taylor.
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||
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This file is part of BFD, the Binary File Descriptor library.
|
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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||
You should have received a copy of the GNU General Public License
|
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along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This file is based on the 64-bit PowerPC ELF ABI. It is also based
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on the file elf32-ppc.c. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/ppc.h"
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#include "elf64-ppc.h"
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#define USE_RELA /* we want RELA relocations, not REL. */
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static void ppc_howto_init
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PARAMS ((void));
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static reloc_howto_type *ppc64_elf_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void ppc64_elf_info_to_howto
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PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst));
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static bfd_reloc_status_type ppc64_elf_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_brtaken_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_sectoff_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_toc_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_toc64_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_unhandled_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static void ppc64_elf_get_symbol_info
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PARAMS ((bfd *, asymbol *, symbol_info *));
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static boolean ppc64_elf_set_private_flags
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PARAMS ((bfd *, flagword));
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static boolean ppc64_elf_merge_private_bfd_data
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PARAMS ((bfd *, bfd *));
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static boolean ppc64_elf_section_from_shdr
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PARAMS ((bfd *, Elf64_Internal_Shdr *, const char *));
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/* The name of the dynamic interpreter. This is put in the .interp
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section. */
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
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/* The size in bytes of an entry in the procedure linkage table. */
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#define PLT_ENTRY_SIZE 24
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/* The initial size of the plt reserved for the dynamic linker. */
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#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
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/* TOC base pointers offset from start of TOC. */
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#define TOC_BASE_OFF (0x8000)
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/* .plt call stub instructions. */
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#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
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#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
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#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
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#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
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#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
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/* ld %r11,xxx+16@l(%r12) */
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#define BCTR 0x4e800420 /* bctr */
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/* The normal stub is this size. */
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#define PLT_CALL_STUB_SIZE (7*4)
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/* But sometimes the .plt entry crosses a 64k boundary, and we need
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to adjust the high word with this insn. */
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#define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
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/* The .glink fixup call stub is the same as the .plt call stub, but
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the first instruction restores r2, and the std is omitted. */
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#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
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/* Always allow this much space. */
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#define GLINK_CALL_STUB_SIZE (8*4)
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/* Pad with this. */
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#define NOP 0x60000000
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/* Some other nops. */
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#define CROR_151515 0x4def7b82
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#define CROR_313131 0x4ffffb82
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/* .glink entries for the first 32k functions are two instructions. */
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#define LI_R0_0 0x38000000 /* li %r0,0 */
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#define B_DOT 0x48000000 /* b . */
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/* After that, we need two instructions to load the index, followed by
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a branch. */
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#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
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#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
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/* Instructions to save and restore floating point regs. */
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#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
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#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
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#define BLR 0x4e800020 /* blr */
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/* Since .opd is an array of descriptors and each entry will end up
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with identical R_PPC64_RELATIVE relocs, there is really no need to
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propagate .opd relocs; The dynamic linker should be taught to
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relocate .opd without reloc entries. FIXME: .opd should be trimmed
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of unused values. */
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#ifndef NO_OPD_RELOCS
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#define NO_OPD_RELOCS 0
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#endif
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/* Relocation HOWTO's. */
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static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
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static reloc_howto_type ppc64_elf_howto_raw[] = {
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/* This reloc does nothing. */
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HOWTO (R_PPC64_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_NONE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 32 bit relocation. */
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HOWTO (R_PPC64_ADDR32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR32", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 26 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC64_ADDR24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR24", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x3fffffc, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 16 bit relocation. */
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HOWTO (R_PPC64_ADDR16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16 bit relocation without overflow. */
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HOWTO (R_PPC64_ADDR16_LO, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16_LO", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Bits 16-31 of an address. */
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HOWTO (R_PPC64_ADDR16_HI, /* type */
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16, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16_HI", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Bits 16-31 of an address, plus 1 if the contents of the low 16
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bits, treated as a signed number, is negative. */
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HOWTO (R_PPC64_ADDR16_HA, /* type */
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16, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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ppc64_elf_ha_reloc, /* special_function */
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"R_PPC64_ADDR16_HA", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC64_ADDR14, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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||
false, /* pc_relative */
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||
0, /* bitpos */
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||
complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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||
"R_PPC64_ADDR14", /* name */
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false, /* partial_inplace */
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||
0, /* src_mask */
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||
0xfffc, /* dst_mask */
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||
false), /* pcrel_offset */
|
||
|
||
/* An absolute 16 bit branch, for which bit 10 should be set to
|
||
indicate that the branch is expected to be taken. The lower two
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bits must be zero. */
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HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
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||
0, /* rightshift */
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||
2, /* size (0 = byte, 1 = short, 2 = long) */
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||
16, /* bitsize */
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||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc64_elf_brtaken_reloc, /* special_function */
|
||
"R_PPC64_ADDR14_BRTAKEN",/* name */
|
||
false, /* partial_inplace */
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||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
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||
false), /* pcrel_offset */
|
||
|
||
/* An absolute 16 bit branch, for which bit 10 should be set to
|
||
indicate that the branch is not expected to be taken. The lower
|
||
two bits must be zero. */
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||
HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
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||
0, /* rightshift */
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||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
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||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc64_elf_brtaken_reloc, /* special_function */
|
||
"R_PPC64_ADDR14_BRNTAKEN",/* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A relative 26 bit branch; the lower two bits must be zero. */
|
||
HOWTO (R_PPC64_REL24, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_REL24", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x3fffffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 16 bit branch; the lower two bits must be zero. */
|
||
HOWTO (R_PPC64_REL14, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_REL14", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 16 bit branch. Bit 10 should be set to indicate that
|
||
the branch is expected to be taken. The lower two bits must be
|
||
zero. */
|
||
HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc64_elf_brtaken_reloc, /* special_function */
|
||
"R_PPC64_REL14_BRTAKEN", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 16 bit branch. Bit 10 should be set to indicate that
|
||
the branch is not expected to be taken. The lower two bits must
|
||
be zero. */
|
||
HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc64_elf_brtaken_reloc, /* special_function */
|
||
"R_PPC64_REL14_BRNTAKEN",/* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
|
||
symbol. */
|
||
HOWTO (R_PPC64_GOT16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_GOT16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC64_GOT16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_GOT16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC64_GOT16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont,/* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_GOT16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC64_GOT16_HA, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont,/* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_GOT16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* This is used only by the dynamic linker. The symbol should exist
|
||
both in the object being run and in some shared library. The
|
||
dynamic linker copies the data addressed by the symbol from the
|
||
shared library into the object, because the object being
|
||
run has to have the data at some particular address. */
|
||
HOWTO (R_PPC64_COPY, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_COPY", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR64, but used when setting global offset table
|
||
entries. */
|
||
HOWTO (R_PPC64_GLOB_DAT, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_GLOB_DAT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffffffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Created by the link editor. Marks a procedure linkage table
|
||
entry for a symbol. */
|
||
HOWTO (R_PPC64_JMP_SLOT, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_JMP_SLOT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Used only by the dynamic linker. When the object is run, this
|
||
doubleword64 is set to the load address of the object, plus the
|
||
addend. */
|
||
HOWTO (R_PPC64_RELATIVE, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_RELATIVE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffffffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR32, but may be unaligned. */
|
||
HOWTO (R_PPC64_UADDR32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_UADDR32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16, but may be unaligned. */
|
||
HOWTO (R_PPC64_UADDR16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_UADDR16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32-bit PC relative. */
|
||
HOWTO (R_PPC64_REL32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
/* FIXME: Verify. Was complain_overflow_bitfield. */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_REL32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 32-bit relocation to the symbol's procedure linkage table. */
|
||
HOWTO (R_PPC64_PLT32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLT32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32-bit PC relative relocation to the symbol's procedure linkage table.
|
||
FIXME: R_PPC64_PLTREL32 not supported. */
|
||
HOWTO (R_PPC64_PLTREL32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_PLTREL32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC64_PLT16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLT16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC64_PLT16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLT16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC64_PLT16_HA, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLT16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16-bit section relative relocation. */
|
||
HOWTO (R_PPC64_SECTOFF, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc64_elf_sectoff_reloc, /* special_function */
|
||
"R_PPC64_SECTOFF", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_SECTOFF, but no overflow warning. */
|
||
HOWTO (R_PPC64_SECTOFF_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_sectoff_reloc, /* special_function */
|
||
"R_PPC64_SECTOFF_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16-bit upper half section relative relocation. */
|
||
HOWTO (R_PPC64_SECTOFF_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_sectoff_reloc, /* special_function */
|
||
"R_PPC64_SECTOFF_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16-bit upper half adjusted section relative relocation. */
|
||
HOWTO (R_PPC64_SECTOFF_HA, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_sectoff_ha_reloc, /* special_function */
|
||
"R_PPC64_SECTOFF_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_REL24 without touching the two least significant
|
||
bits. Should have been named R_PPC64_REL30! */
|
||
HOWTO (R_PPC64_ADDR30, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
30, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_ADDR30", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffffffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
|
||
|
||
/* A standard 64-bit relocation. */
|
||
HOWTO (R_PPC64_ADDR64, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_ADDR64", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffffffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The bits 32-47 of an address. */
|
||
HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
|
||
32, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_ADDR16_HIGHER", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The bits 32-47 of an address, plus 1 if the contents of the low
|
||
16 bits, treated as a signed number, is negative. */
|
||
HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
|
||
32, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_ha_reloc, /* special_function */
|
||
"R_PPC64_ADDR16_HIGHERA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The bits 48-63 of an address. */
|
||
HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
|
||
48, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_ADDR16_HIGHEST", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The bits 48-63 of an address, plus 1 if the contents of the low
|
||
16 bits, treated as a signed number, is negative. */
|
||
HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
|
||
48, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_ha_reloc, /* special_function */
|
||
"R_PPC64_ADDR16_HIGHESTA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like ADDR64, but may be unaligned. */
|
||
HOWTO (R_PPC64_UADDR64, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_UADDR64", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffffffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 64-bit relative relocation. */
|
||
HOWTO (R_PPC64_REL64, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
||
64, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_REL64", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffffffffffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 64-bit relocation to the symbol's procedure linkage table. */
|
||
HOWTO (R_PPC64_PLT64, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLT64", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 64-bit PC relative relocation to the symbol's procedure linkage
|
||
table. */
|
||
/* FIXME: R_PPC64_PLTREL64 not supported. */
|
||
HOWTO (R_PPC64_PLTREL64, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
||
64, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLTREL64", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 16 bit TOC-relative relocation. */
|
||
|
||
/* R_PPC64_TOC16 47 half16* S + A - .TOC. */
|
||
HOWTO (R_PPC64_TOC16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc64_elf_toc_reloc, /* special_function */
|
||
"R_PPC64_TOC16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit TOC-relative relocation without overflow. */
|
||
|
||
/* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
|
||
HOWTO (R_PPC64_TOC16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_toc_reloc, /* special_function */
|
||
"R_PPC64_TOC16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit TOC-relative relocation, high 16 bits. */
|
||
|
||
/* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
|
||
HOWTO (R_PPC64_TOC16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_toc_reloc, /* special_function */
|
||
"R_PPC64_TOC16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
|
||
contents of the low 16 bits, treated as a signed number, is
|
||
negative. */
|
||
|
||
/* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
|
||
HOWTO (R_PPC64_TOC16_HA, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_toc_ha_reloc, /* special_function */
|
||
"R_PPC64_TOC16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 64-bit relocation; insert value of TOC base (.TOC.). */
|
||
|
||
/* R_PPC64_TOC 51 doubleword64 .TOC. */
|
||
HOWTO (R_PPC64_TOC, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc64_elf_toc64_reloc, /* special_function */
|
||
"R_PPC64_TOC", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffffffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_GOT16, but also informs the link editor that the
|
||
value to relocate may (!) refer to a PLT entry which the link
|
||
editor (a) may replace with the symbol value. If the link editor
|
||
is unable to fully resolve the symbol, it may (b) create a PLT
|
||
entry and store the address to the new PLT entry in the GOT.
|
||
This permits lazy resolution of function symbols at run time.
|
||
The link editor may also skip all of this and just (c) emit a
|
||
R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
|
||
/* FIXME: R_PPC64_PLTGOT16 not implemented. */
|
||
HOWTO (R_PPC64_PLTGOT16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLTGOT16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_PLTGOT16, but without overflow. */
|
||
/* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
|
||
HOWTO (R_PPC64_PLTGOT16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLTGOT16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
|
||
/* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
|
||
HOWTO (R_PPC64_PLTGOT16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLTGOT16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
|
||
1 if the contents of the low 16 bits, treated as a signed number,
|
||
is negative. */
|
||
/* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
|
||
HOWTO (R_PPC64_PLTGOT16_HA, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont,/* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLTGOT16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_ADDR16_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_ADDR16_DS", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont,/* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC64_ADDR16_LO_DS",/* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_GOT16, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_GOT16_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_GOT16_DS", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_GOT16_LO_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_GOT16_LO_DS", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_PLT16_LO_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLT16_LO_DS", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_SECTOFF_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc64_elf_sectoff_reloc, /* special_function */
|
||
"R_PPC64_SECTOFF_DS", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_sectoff_reloc, /* special_function */
|
||
"R_PPC64_SECTOFF_LO_DS",/* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_TOC16, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_TOC16_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc64_elf_toc_reloc, /* special_function */
|
||
"R_PPC64_TOC16_DS", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
|
||
HOWTO (R_PPC64_TOC16_LO_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_toc_reloc, /* special_function */
|
||
"R_PPC64_TOC16_LO_DS", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
|
||
/* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
|
||
HOWTO (R_PPC64_PLTGOT16_DS, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLTGOT16_DS", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
|
||
/* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
|
||
HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc64_elf_unhandled_reloc, /* special_function */
|
||
"R_PPC64_PLTGOT16_LO_DS",/* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable hierarchy. */
|
||
HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
NULL, /* special_function */
|
||
"R_PPC64_GNU_VTINHERIT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable member usage. */
|
||
HOWTO (R_PPC64_GNU_VTENTRY, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
NULL, /* special_function */
|
||
"R_PPC64_GNU_VTENTRY", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
};
|
||
|
||
|
||
/* Initialize the ppc64_elf_howto_table, so that linear accesses can
|
||
be done. */
|
||
|
||
static void
|
||
ppc_howto_init ()
|
||
{
|
||
unsigned int i, type;
|
||
|
||
for (i = 0;
|
||
i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
|
||
i++)
|
||
{
|
||
type = ppc64_elf_howto_raw[i].type;
|
||
BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
|
||
/ sizeof (ppc64_elf_howto_table[0])));
|
||
ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
|
||
}
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
ppc64_elf_reloc_type_lookup (abfd, code)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
|
||
|
||
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
|
||
/* Initialize howto table if needed. */
|
||
ppc_howto_init ();
|
||
|
||
switch ((int) code)
|
||
{
|
||
default:
|
||
return (reloc_howto_type *) NULL;
|
||
|
||
case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE;
|
||
break;
|
||
case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32;
|
||
break;
|
||
case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24;
|
||
break;
|
||
case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16;
|
||
break;
|
||
case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO;
|
||
break;
|
||
case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI;
|
||
break;
|
||
case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA;
|
||
break;
|
||
case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14;
|
||
break;
|
||
case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN;
|
||
break;
|
||
case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN;
|
||
break;
|
||
case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24;
|
||
break;
|
||
case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14;
|
||
break;
|
||
case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN;
|
||
break;
|
||
case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN;
|
||
break;
|
||
case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16;
|
||
break;
|
||
case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO;
|
||
break;
|
||
case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI;
|
||
break;
|
||
case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA;
|
||
break;
|
||
case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY;
|
||
break;
|
||
case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT;
|
||
break;
|
||
case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32;
|
||
break;
|
||
case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32;
|
||
break;
|
||
case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32;
|
||
break;
|
||
case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO;
|
||
break;
|
||
case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI;
|
||
break;
|
||
case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA;
|
||
break;
|
||
case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
|
||
break;
|
||
case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO;
|
||
break;
|
||
case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI;
|
||
break;
|
||
case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA;
|
||
break;
|
||
case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64;
|
||
break;
|
||
case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64;
|
||
break;
|
||
case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER;
|
||
break;
|
||
case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA;
|
||
break;
|
||
case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST;
|
||
break;
|
||
case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA;
|
||
break;
|
||
case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64;
|
||
break;
|
||
case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64;
|
||
break;
|
||
case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64;
|
||
break;
|
||
case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16;
|
||
break;
|
||
case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO;
|
||
break;
|
||
case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI;
|
||
break;
|
||
case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA;
|
||
break;
|
||
case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC;
|
||
break;
|
||
case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16;
|
||
break;
|
||
case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO;
|
||
break;
|
||
case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI;
|
||
break;
|
||
case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA;
|
||
break;
|
||
case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS;
|
||
break;
|
||
case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS;
|
||
break;
|
||
case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT;
|
||
break;
|
||
case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY;
|
||
break;
|
||
}
|
||
|
||
return ppc64_elf_howto_table[(int) ppc_reloc];
|
||
};
|
||
|
||
/* Set the howto pointer for a PowerPC ELF reloc. */
|
||
|
||
static void
|
||
ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *cache_ptr;
|
||
Elf64_Internal_Rela *dst;
|
||
{
|
||
unsigned int type;
|
||
|
||
/* Initialize howto table if needed. */
|
||
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
|
||
ppc_howto_init ();
|
||
|
||
type = ELF64_R_TYPE (dst->r_info);
|
||
BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
|
||
/ sizeof (ppc64_elf_howto_table[0])));
|
||
cache_ptr->howto = ppc64_elf_howto_table[type];
|
||
}
|
||
|
||
/* Handle the R_PPC_ADDR16_HA and similar relocs. */
|
||
|
||
static bfd_reloc_status_type
|
||
ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
/* If this is a relocatable link (output_bfd test tells us), just
|
||
call the generic function. Any adjustment will be done at final
|
||
link time. */
|
||
if (output_bfd != NULL)
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
/* Adjust the addend for sign extension of the low 16 bits.
|
||
We won't actually be using the low 16 bits, so trashing them
|
||
doesn't matter. */
|
||
reloc_entry->addend += 0x8000;
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
long insn;
|
||
enum elf_ppc_reloc_type r_type;
|
||
bfd_size_type octets;
|
||
/* Disabled until we sort out how ld should choose 'y' vs 'at'. */
|
||
boolean is_power4 = false;
|
||
|
||
/* If this is a relocatable link (output_bfd test tells us), just
|
||
call the generic function. Any adjustment will be done at final
|
||
link time. */
|
||
if (output_bfd != NULL)
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
octets = reloc_entry->address * bfd_octets_per_byte (abfd);
|
||
insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
|
||
insn &= ~(0x01 << 21);
|
||
r_type = (enum elf_ppc_reloc_type) reloc_entry->howto->type;
|
||
if (r_type == R_PPC64_ADDR14_BRTAKEN
|
||
|| r_type == R_PPC64_REL14_BRTAKEN)
|
||
insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
|
||
|
||
if (is_power4)
|
||
{
|
||
/* Set 'a' bit. This is 0b00010 in BO field for branch
|
||
on CR(BI) insns (BO == 001at or 011at), and 0b01000
|
||
for branch on CTR insns (BO == 1a00t or 1a01t). */
|
||
if ((insn & (0x14 << 21)) == (0x04 << 21))
|
||
insn |= 0x02 << 21;
|
||
else if ((insn & (0x14 << 21)) == (0x10 << 21))
|
||
insn |= 0x08 << 21;
|
||
else
|
||
return bfd_reloc_continue;
|
||
}
|
||
else
|
||
{
|
||
bfd_vma target = 0;
|
||
bfd_vma from;
|
||
|
||
if (!bfd_is_com_section (symbol->section))
|
||
target = symbol->value;
|
||
target += symbol->section->output_section->vma;
|
||
target += symbol->section->output_offset;
|
||
target += reloc_entry->addend;
|
||
|
||
from = (reloc_entry->address
|
||
+ input_section->output_offset
|
||
+ input_section->output_section->vma);
|
||
|
||
/* Invert 'y' bit if not the default. */
|
||
if ((bfd_signed_vma) (target - from) < 0)
|
||
insn ^= 0x01 << 21;
|
||
}
|
||
bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets);
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
/* If this is a relocatable link (output_bfd test tells us), just
|
||
call the generic function. Any adjustment will be done at final
|
||
link time. */
|
||
if (output_bfd != NULL)
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
/* Subtract the symbol section base address. */
|
||
reloc_entry->addend -= symbol->section->output_section->vma;
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
/* If this is a relocatable link (output_bfd test tells us), just
|
||
call the generic function. Any adjustment will be done at final
|
||
link time. */
|
||
if (output_bfd != NULL)
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
/* Subtract the symbol section base address. */
|
||
reloc_entry->addend -= symbol->section->output_section->vma;
|
||
|
||
/* Adjust the addend for sign extension of the low 16 bits. */
|
||
reloc_entry->addend += 0x8000;
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
bfd_vma TOCstart;
|
||
|
||
/* If this is a relocatable link (output_bfd test tells us), just
|
||
call the generic function. Any adjustment will be done at final
|
||
link time. */
|
||
if (output_bfd != NULL)
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
|
||
if (TOCstart == 0)
|
||
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
|
||
|
||
/* Subtract the TOC base address. */
|
||
reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
bfd_vma TOCstart;
|
||
|
||
/* If this is a relocatable link (output_bfd test tells us), just
|
||
call the generic function. Any adjustment will be done at final
|
||
link time. */
|
||
if (output_bfd != NULL)
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
|
||
if (TOCstart == 0)
|
||
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
|
||
|
||
/* Subtract the TOC base address. */
|
||
reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
|
||
|
||
/* Adjust the addend for sign extension of the low 16 bits. */
|
||
reloc_entry->addend += 0x8000;
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
bfd_vma TOCstart;
|
||
bfd_size_type octets;
|
||
|
||
/* If this is a relocatable link (output_bfd test tells us), just
|
||
call the generic function. Any adjustment will be done at final
|
||
link time. */
|
||
if (output_bfd != NULL)
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
|
||
if (TOCstart == 0)
|
||
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
|
||
|
||
octets = reloc_entry->address * bfd_octets_per_byte (abfd);
|
||
bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
/* If this is a relocatable link (output_bfd test tells us), just
|
||
call the generic function. Any adjustment will be done at final
|
||
link time. */
|
||
if (output_bfd != NULL)
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
if (error_message != NULL)
|
||
{
|
||
static char buf[60];
|
||
sprintf (buf, "generic linker can't handle %s",
|
||
reloc_entry->howto->name);
|
||
*error_message = buf;
|
||
}
|
||
return bfd_reloc_dangerous;
|
||
}
|
||
|
||
/* Return symbol info as per usual for ELF targets, except that
|
||
symbols in .opd are given 'd' or 'D' for type. */
|
||
|
||
static void
|
||
ppc64_elf_get_symbol_info (abfd, symbol, ret)
|
||
bfd *abfd;
|
||
asymbol *symbol;
|
||
symbol_info *ret;
|
||
{
|
||
_bfd_elf_get_symbol_info (abfd, symbol, ret);
|
||
if (ret->type == '?'
|
||
&& (symbol->flags & (BSF_GLOBAL | BSF_LOCAL)) != 0
|
||
&& strcmp (symbol->section->name, ".opd") == 0)
|
||
ret->type = (symbol->flags & BSF_GLOBAL) != 0 ? 'D' : 'd';
|
||
}
|
||
|
||
/* Function to set whether a module needs the -mrelocatable bit set. */
|
||
|
||
static boolean
|
||
ppc64_elf_set_private_flags (abfd, flags)
|
||
bfd *abfd;
|
||
flagword flags;
|
||
{
|
||
BFD_ASSERT (!elf_flags_init (abfd)
|
||
|| elf_elfheader (abfd)->e_flags == flags);
|
||
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = true;
|
||
return true;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
static boolean
|
||
ppc64_elf_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
flagword old_flags;
|
||
flagword new_flags;
|
||
boolean error;
|
||
|
||
/* Check if we have the same endianess. */
|
||
if (ibfd->xvec->byteorder != obfd->xvec->byteorder
|
||
&& obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
|
||
{
|
||
const char *msg;
|
||
|
||
if (bfd_big_endian (ibfd))
|
||
msg = _("%s: compiled for a big endian system and target is little endian");
|
||
else
|
||
msg = _("%s: compiled for a little endian system and target is big endian");
|
||
|
||
(*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
|
||
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return false;
|
||
}
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
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;
|
||
}
|
||
|
||
else if (new_flags == old_flags)
|
||
/* Compatible flags are ok. */
|
||
;
|
||
|
||
else
|
||
{
|
||
/* Incompatible flags. Warn about -mrelocatable mismatch.
|
||
Allow -mrelocatable-lib to be linked with either. */
|
||
error = false;
|
||
if ((new_flags & EF_PPC_RELOCATABLE) != 0
|
||
&& (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
|
||
{
|
||
error = true;
|
||
(*_bfd_error_handler)
|
||
(_("%s: compiled with -mrelocatable and linked with modules compiled normally"),
|
||
bfd_archive_filename (ibfd));
|
||
}
|
||
else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
|
||
&& (old_flags & EF_PPC_RELOCATABLE) != 0)
|
||
{
|
||
error = true;
|
||
(*_bfd_error_handler)
|
||
(_("%s: compiled normally and linked with modules compiled with -mrelocatable"),
|
||
bfd_archive_filename (ibfd));
|
||
}
|
||
|
||
/* The output is -mrelocatable-lib iff both the input files are. */
|
||
if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
|
||
elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
|
||
|
||
/* The output is -mrelocatable iff it can't be -mrelocatable-lib,
|
||
but each input file is either -mrelocatable or -mrelocatable-lib. */
|
||
if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
|
||
&& (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
|
||
&& (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
|
||
elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
|
||
|
||
/* Do not warn about eabi vs. V.4 mismatch, just or in the bit
|
||
if any module uses it. */
|
||
elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
|
||
|
||
new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
|
||
old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
|
||
|
||
/* Warn about any other mismatches. */
|
||
if (new_flags != old_flags)
|
||
{
|
||
error = true;
|
||
(*_bfd_error_handler)
|
||
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
|
||
bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
|
||
}
|
||
|
||
if (error)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Handle a PowerPC specific section when reading an object file. This
|
||
is called when elfcode.h finds a section with an unknown type. */
|
||
|
||
static boolean
|
||
ppc64_elf_section_from_shdr (abfd, hdr, name)
|
||
bfd *abfd;
|
||
Elf64_Internal_Shdr *hdr;
|
||
const char *name;
|
||
{
|
||
asection *newsect;
|
||
flagword flags;
|
||
|
||
if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
|
||
return false;
|
||
|
||
newsect = hdr->bfd_section;
|
||
flags = bfd_get_section_flags (abfd, newsect);
|
||
if (hdr->sh_flags & SHF_EXCLUDE)
|
||
flags |= SEC_EXCLUDE;
|
||
|
||
if (hdr->sh_type == SHT_ORDERED)
|
||
flags |= SEC_SORT_ENTRIES;
|
||
|
||
bfd_set_section_flags (abfd, newsect, flags);
|
||
return true;
|
||
}
|
||
|
||
/* The following functions are specific to the ELF linker, while
|
||
functions above are used generally. Those named ppc64_elf_* are
|
||
called by the main ELF linker code. They appear in this file more
|
||
or less in the order in which they are called. eg.
|
||
ppc64_elf_check_relocs is called early in the link process,
|
||
ppc64_elf_finish_dynamic_sections is one of the last functions
|
||
called.
|
||
|
||
PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
|
||
functions have both a function code symbol and a function descriptor
|
||
symbol. A call to foo in a relocatable object file looks like:
|
||
|
||
. .text
|
||
. x:
|
||
. bl .foo
|
||
. nop
|
||
|
||
The function definition in another object file might be:
|
||
|
||
. .section .opd
|
||
. foo: .quad .foo
|
||
. .quad .TOC.@tocbase
|
||
. .quad 0
|
||
.
|
||
. .text
|
||
. .foo: blr
|
||
|
||
When the linker resolves the call during a static link, the branch
|
||
unsurprisingly just goes to .foo and the .opd information is unused.
|
||
If the function definition is in a shared library, things are a little
|
||
different: The call goes via a plt call stub, the opd information gets
|
||
copied to the plt, and the linker patches the nop.
|
||
|
||
. x:
|
||
. bl .foo_stub
|
||
. ld 2,40(1)
|
||
.
|
||
.
|
||
. .foo_stub:
|
||
. addis 12,2,Lfoo@toc@ha # in practice, the call stub
|
||
. addi 12,12,Lfoo@toc@l # is slightly optimised, but
|
||
. std 2,40(1) # this is the general idea
|
||
. ld 11,0(12)
|
||
. ld 2,8(12)
|
||
. mtctr 11
|
||
. ld 11,16(12)
|
||
. bctr
|
||
.
|
||
. .section .plt
|
||
. Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
|
||
|
||
The "reloc ()" notation is supposed to indicate that the linker emits
|
||
an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
|
||
copying.
|
||
|
||
What are the difficulties here? Well, firstly, the relocations
|
||
examined by the linker in check_relocs are against the function code
|
||
sym .foo, while the dynamic relocation in the plt is emitted against
|
||
the function descriptor symbol, foo. Somewhere along the line, we need
|
||
to carefully copy dynamic link information from one symbol to the other.
|
||
Secondly, the generic part of the elf linker will make .foo a dynamic
|
||
symbol as is normal for most other backends. We need foo dynamic
|
||
instead, at least for an application final link. However, when
|
||
creating a shared library containing foo, we need to have both symbols
|
||
dynamic so that references to .foo are satisfied during the early
|
||
stages of linking. Otherwise the linker might decide to pull in a
|
||
definition from some other object, eg. a static library. */
|
||
|
||
/* The linker needs to keep track of the number of relocs that it
|
||
decides to copy as dynamic relocs in check_relocs for each symbol.
|
||
This is so that it can later discard them if they are found to be
|
||
unnecessary. We store the information in a field extending the
|
||
regular ELF linker hash table. */
|
||
|
||
struct ppc_dyn_relocs
|
||
{
|
||
struct ppc_dyn_relocs *next;
|
||
|
||
/* The input section of the reloc. */
|
||
asection *sec;
|
||
|
||
/* Total number of relocs copied for the input section. */
|
||
bfd_size_type count;
|
||
|
||
/* Number of pc-relative relocs copied for the input section. */
|
||
bfd_size_type pc_count;
|
||
};
|
||
|
||
/* Of those relocs that might be copied as dynamic relocs, this macro
|
||
selects between relative and absolute types. */
|
||
|
||
#define IS_ABSOLUTE_RELOC(RTYPE) \
|
||
((RTYPE) != R_PPC64_REL32 \
|
||
&& (RTYPE) != R_PPC64_REL64 \
|
||
&& (RTYPE) != R_PPC64_ADDR30)
|
||
|
||
/* Section name for stubs is the associated section name plus this
|
||
string. */
|
||
#define STUB_SUFFIX ".stub"
|
||
|
||
/* Linker stubs.
|
||
ppc_stub_long_branch:
|
||
Used when a 14 bit branch (or even a 24 bit branch) can't reach its
|
||
destination, but a 24 bit branch in a stub section will reach.
|
||
. b dest
|
||
|
||
ppc_stub_plt_branch:
|
||
Similar to the above, but a 24 bit branch in the stub section won't
|
||
reach its destination.
|
||
. addis %r12,%r2,xxx@ha
|
||
. ld %r11,xxx@l(%r12)
|
||
. mtctr %r11
|
||
. bctr
|
||
|
||
ppc_stub_plt_call:
|
||
Used to call a function in a shared library.
|
||
. addis %r12,%r2,xxx@ha
|
||
. std %r2,40(%r1)
|
||
. ld %r11,xxx+0@l(%r12)
|
||
. ld %r2,xxx+8@l(%r12)
|
||
. mtctr %r11
|
||
. ld %r11,xxx+16@l(%r12)
|
||
. bctr
|
||
*/
|
||
|
||
enum ppc_stub_type {
|
||
ppc_stub_none,
|
||
ppc_stub_long_branch,
|
||
ppc_stub_plt_branch,
|
||
ppc_stub_plt_call
|
||
};
|
||
|
||
struct ppc_stub_hash_entry {
|
||
|
||
/* Base hash table entry structure. */
|
||
struct bfd_hash_entry 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 ppc_stub_type stub_type;
|
||
|
||
/* The symbol table entry, if any, that this was derived from. */
|
||
struct ppc_link_hash_entry *h;
|
||
|
||
/* 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;
|
||
};
|
||
|
||
struct ppc_branch_hash_entry {
|
||
|
||
/* Base hash table entry structure. */
|
||
struct bfd_hash_entry root;
|
||
|
||
/* Offset within .branch_lt. */
|
||
unsigned int offset;
|
||
|
||
/* Generation marker. */
|
||
unsigned int iter;
|
||
};
|
||
|
||
struct ppc_link_hash_entry
|
||
{
|
||
struct elf_link_hash_entry elf;
|
||
|
||
/* A pointer to the most recently used stub hash entry against this
|
||
symbol. */
|
||
struct ppc_stub_hash_entry *stub_cache;
|
||
|
||
/* Track dynamic relocs copied for this symbol. */
|
||
struct ppc_dyn_relocs *dyn_relocs;
|
||
|
||
/* Link between function code and descriptor symbols. */
|
||
struct elf_link_hash_entry *oh;
|
||
|
||
/* Flag function code and descriptor symbols. */
|
||
unsigned int is_func:1;
|
||
unsigned int is_func_descriptor:1;
|
||
};
|
||
|
||
/* ppc64 ELF linker hash table. */
|
||
|
||
struct ppc_link_hash_table
|
||
{
|
||
struct elf_link_hash_table elf;
|
||
|
||
/* The stub hash table. */
|
||
struct bfd_hash_table stub_hash_table;
|
||
|
||
/* Another hash table for plt_branch stubs. */
|
||
struct bfd_hash_table branch_hash_table;
|
||
|
||
/* Linker stub bfd. */
|
||
bfd *stub_bfd;
|
||
|
||
/* Linker call-backs. */
|
||
asection * (*add_stub_section) PARAMS ((const char *, asection *));
|
||
void (*layout_sections_again) PARAMS ((void));
|
||
|
||
/* Array to keep track of which stub sections have been created, and
|
||
information on stub grouping. */
|
||
struct map_stub {
|
||
/* This is the section to which stubs in the group will be attached. */
|
||
asection *link_sec;
|
||
/* The stub section. */
|
||
asection *stub_sec;
|
||
} *stub_group;
|
||
|
||
/* Assorted information used by ppc64_elf_size_stubs. */
|
||
unsigned int bfd_count;
|
||
int top_index;
|
||
asection **input_list;
|
||
Elf_Internal_Sym **all_local_syms;
|
||
|
||
/* Short-cuts to get to dynamic linker sections. */
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
asection *splt;
|
||
asection *srelplt;
|
||
asection *sdynbss;
|
||
asection *srelbss;
|
||
asection *sglink;
|
||
asection *sfpr;
|
||
asection *sbrlt;
|
||
asection *srelbrlt;
|
||
|
||
/* Set on error. */
|
||
unsigned int stub_error;
|
||
|
||
/* Flag set when small branches are detected. Used to
|
||
select suitable defaults for the stub group size. */
|
||
unsigned int has_14bit_branch;
|
||
|
||
/* Set if we detect a reference undefined weak symbol. */
|
||
unsigned int have_undefweak;
|
||
|
||
/* Incremented every time we size stubs. */
|
||
unsigned int stub_iteration;
|
||
|
||
/* Small local sym to section mapping cache. */
|
||
struct sym_sec_cache sym_sec;
|
||
};
|
||
|
||
static struct bfd_hash_entry *stub_hash_newfunc
|
||
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
||
static struct bfd_hash_entry *branch_hash_newfunc
|
||
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
||
static struct bfd_hash_entry *link_hash_newfunc
|
||
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
||
static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
|
||
PARAMS ((bfd *));
|
||
static void ppc64_elf_link_hash_table_free
|
||
PARAMS ((struct bfd_link_hash_table *));
|
||
static char *ppc_stub_name
|
||
PARAMS ((const asection *, const asection *,
|
||
const struct ppc_link_hash_entry *, const Elf_Internal_Rela *));
|
||
static struct ppc_stub_hash_entry *ppc_get_stub_entry
|
||
PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *,
|
||
const Elf_Internal_Rela *, struct ppc_link_hash_table *));
|
||
static struct ppc_stub_hash_entry *ppc_add_stub
|
||
PARAMS ((const char *, asection *, struct ppc_link_hash_table *));
|
||
static boolean create_linkage_sections
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static boolean create_got_section
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static boolean ppc64_elf_create_dynamic_sections
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static void ppc64_elf_copy_indirect_symbol
|
||
PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
|
||
static boolean ppc64_elf_check_relocs
|
||
PARAMS ((bfd *, struct bfd_link_info *, asection *,
|
||
const Elf_Internal_Rela *));
|
||
static asection * ppc64_elf_gc_mark_hook
|
||
PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel,
|
||
struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
|
||
static boolean ppc64_elf_gc_sweep_hook
|
||
PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec,
|
||
const Elf_Internal_Rela *relocs));
|
||
static boolean func_desc_adjust
|
||
PARAMS ((struct elf_link_hash_entry *, PTR));
|
||
static boolean ppc64_elf_func_desc_adjust
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static boolean ppc64_elf_adjust_dynamic_symbol
|
||
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
|
||
static void ppc64_elf_hide_symbol
|
||
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
|
||
static boolean allocate_dynrelocs
|
||
PARAMS ((struct elf_link_hash_entry *, PTR));
|
||
static boolean readonly_dynrelocs
|
||
PARAMS ((struct elf_link_hash_entry *, PTR));
|
||
static enum elf_reloc_type_class ppc64_elf_reloc_type_class
|
||
PARAMS ((const Elf_Internal_Rela *));
|
||
static boolean ppc64_elf_size_dynamic_sections
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static INLINE enum ppc_stub_type ppc_type_of_stub
|
||
PARAMS ((asection *, const Elf_Internal_Rela *,
|
||
struct ppc_link_hash_entry **, bfd_vma));
|
||
static bfd_byte *build_plt_stub
|
||
PARAMS ((bfd *, bfd_byte *, int, int));
|
||
static boolean ppc_build_one_stub
|
||
PARAMS ((struct bfd_hash_entry *, PTR));
|
||
static boolean ppc_size_one_stub
|
||
PARAMS ((struct bfd_hash_entry *, PTR));
|
||
static void group_sections
|
||
PARAMS ((struct ppc_link_hash_table *, bfd_size_type, boolean));
|
||
static boolean get_local_syms
|
||
PARAMS ((bfd *, struct ppc_link_hash_table *));
|
||
static boolean ppc64_elf_fake_sections
|
||
PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *));
|
||
static boolean ppc64_elf_relocate_section
|
||
PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
|
||
Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
|
||
asection **));
|
||
static boolean ppc64_elf_finish_dynamic_symbol
|
||
PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
|
||
Elf_Internal_Sym *));
|
||
static boolean ppc64_elf_finish_dynamic_sections
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
|
||
/* Get the ppc64 ELF linker hash table from a link_info structure. */
|
||
|
||
#define ppc_hash_table(p) \
|
||
((struct ppc_link_hash_table *) ((p)->hash))
|
||
|
||
#define ppc_stub_hash_lookup(table, string, create, copy) \
|
||
((struct ppc_stub_hash_entry *) \
|
||
bfd_hash_lookup ((table), (string), (create), (copy)))
|
||
|
||
#define ppc_branch_hash_lookup(table, string, create, copy) \
|
||
((struct ppc_branch_hash_entry *) \
|
||
bfd_hash_lookup ((table), (string), (create), (copy)))
|
||
|
||
/* Create an entry in the stub hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
stub_hash_newfunc (entry, table, string)
|
||
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 ppc_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 ppc_stub_hash_entry *eh;
|
||
|
||
/* Initialize the local fields. */
|
||
eh = (struct ppc_stub_hash_entry *) entry;
|
||
eh->stub_sec = NULL;
|
||
eh->stub_offset = 0;
|
||
eh->target_value = 0;
|
||
eh->target_section = NULL;
|
||
eh->stub_type = ppc_stub_none;
|
||
eh->h = NULL;
|
||
eh->id_sec = NULL;
|
||
}
|
||
|
||
return entry;
|
||
}
|
||
|
||
/* Create an entry in the branch hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
branch_hash_newfunc (entry, table, string)
|
||
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 ppc_branch_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 ppc_branch_hash_entry *eh;
|
||
|
||
/* Initialize the local fields. */
|
||
eh = (struct ppc_branch_hash_entry *) entry;
|
||
eh->offset = 0;
|
||
eh->iter = 0;
|
||
}
|
||
|
||
return entry;
|
||
}
|
||
|
||
/* Create an entry in a ppc64 ELF linker hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
link_hash_newfunc (entry, table, string)
|
||
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 ppc_link_hash_entry));
|
||
if (entry == NULL)
|
||
return entry;
|
||
}
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
|
||
if (entry != NULL)
|
||
{
|
||
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
|
||
|
||
eh->stub_cache = NULL;
|
||
eh->dyn_relocs = NULL;
|
||
eh->oh = NULL;
|
||
eh->is_func = 0;
|
||
eh->is_func_descriptor = 0;
|
||
}
|
||
|
||
return entry;
|
||
}
|
||
|
||
/* Create a ppc64 ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
ppc64_elf_link_hash_table_create (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
bfd_size_type amt = sizeof (struct ppc_link_hash_table);
|
||
|
||
htab = (struct ppc_link_hash_table *) bfd_malloc (amt);
|
||
if (htab == NULL)
|
||
return NULL;
|
||
|
||
if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
|
||
{
|
||
free (htab);
|
||
return NULL;
|
||
}
|
||
|
||
/* Init the stub hash table too. */
|
||
if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
|
||
return NULL;
|
||
|
||
/* And the branch hash table. */
|
||
if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
|
||
return NULL;
|
||
|
||
htab->stub_bfd = NULL;
|
||
htab->add_stub_section = NULL;
|
||
htab->layout_sections_again = NULL;
|
||
htab->stub_group = NULL;
|
||
htab->sgot = NULL;
|
||
htab->srelgot = NULL;
|
||
htab->splt = NULL;
|
||
htab->srelplt = NULL;
|
||
htab->sdynbss = NULL;
|
||
htab->srelbss = NULL;
|
||
htab->sglink = NULL;
|
||
htab->sfpr = NULL;
|
||
htab->sbrlt = NULL;
|
||
htab->srelbrlt = NULL;
|
||
htab->stub_error = 0;
|
||
htab->has_14bit_branch = 0;
|
||
htab->have_undefweak = 0;
|
||
htab->stub_iteration = 0;
|
||
htab->sym_sec.abfd = NULL;
|
||
|
||
return &htab->elf.root;
|
||
}
|
||
|
||
/* Free the derived linker hash table. */
|
||
|
||
static void
|
||
ppc64_elf_link_hash_table_free (hash)
|
||
struct bfd_link_hash_table *hash;
|
||
{
|
||
struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
|
||
|
||
bfd_hash_table_free (&ret->stub_hash_table);
|
||
bfd_hash_table_free (&ret->branch_hash_table);
|
||
_bfd_generic_link_hash_table_free (hash);
|
||
}
|
||
|
||
/* Build a name for an entry in the stub hash table. */
|
||
|
||
static char *
|
||
ppc_stub_name (input_section, sym_sec, h, rel)
|
||
const asection *input_section;
|
||
const asection *sym_sec;
|
||
const struct ppc_link_hash_entry *h;
|
||
const Elf_Internal_Rela *rel;
|
||
{
|
||
char *stub_name;
|
||
bfd_size_type len;
|
||
|
||
/* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
|
||
offsets from a sym as a branch target? In fact, we could
|
||
probably assume the addend is always zero. */
|
||
BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
|
||
|
||
if (h)
|
||
{
|
||
len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
|
||
stub_name = bfd_malloc (len);
|
||
if (stub_name != NULL)
|
||
{
|
||
sprintf (stub_name, "%08x_%s+%x",
|
||
input_section->id & 0xffffffff,
|
||
h->elf.root.root.string,
|
||
(int) rel->r_addend & 0xffffffff);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
|
||
stub_name = bfd_malloc (len);
|
||
if (stub_name != NULL)
|
||
{
|
||
sprintf (stub_name, "%08x_%x:%x+%x",
|
||
input_section->id & 0xffffffff,
|
||
sym_sec->id & 0xffffffff,
|
||
(int) ELF64_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 ppc_stub_hash_entry *
|
||
ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab)
|
||
const asection *input_section;
|
||
const asection *sym_sec;
|
||
struct elf_link_hash_entry *hash;
|
||
const Elf_Internal_Rela *rel;
|
||
struct ppc_link_hash_table *htab;
|
||
{
|
||
struct ppc_stub_hash_entry *stub_entry;
|
||
struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
|
||
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 section in 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. */
|
||
id_sec = htab->stub_group[input_section->id].link_sec;
|
||
|
||
if (h != NULL && h->stub_cache != NULL
|
||
&& h->stub_cache->h == h
|
||
&& h->stub_cache->id_sec == id_sec)
|
||
{
|
||
stub_entry = h->stub_cache;
|
||
}
|
||
else
|
||
{
|
||
char *stub_name;
|
||
|
||
stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
|
||
if (stub_name == NULL)
|
||
return NULL;
|
||
|
||
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
|
||
stub_name, false, false);
|
||
if (h != NULL)
|
||
h->stub_cache = stub_entry;
|
||
|
||
free (stub_name);
|
||
}
|
||
|
||
return stub_entry;
|
||
}
|
||
|
||
/* Add a new stub entry to the stub hash. Not all fields of the new
|
||
stub entry are initialised. */
|
||
|
||
static struct ppc_stub_hash_entry *
|
||
ppc_add_stub (stub_name, section, htab)
|
||
const char *stub_name;
|
||
asection *section;
|
||
struct ppc_link_hash_table *htab;
|
||
{
|
||
asection *link_sec;
|
||
asection *stub_sec;
|
||
struct ppc_stub_hash_entry *stub_entry;
|
||
|
||
link_sec = htab->stub_group[section->id].link_sec;
|
||
stub_sec = htab->stub_group[section->id].stub_sec;
|
||
if (stub_sec == NULL)
|
||
{
|
||
stub_sec = htab->stub_group[link_sec->id].stub_sec;
|
||
if (stub_sec == NULL)
|
||
{
|
||
bfd_size_type len;
|
||
char *s_name;
|
||
|
||
len = strlen (link_sec->name) + sizeof (STUB_SUFFIX);
|
||
s_name = bfd_alloc (htab->stub_bfd, len);
|
||
if (s_name == NULL)
|
||
return NULL;
|
||
|
||
strcpy (s_name, link_sec->name);
|
||
strcpy (s_name + len - sizeof (STUB_SUFFIX), STUB_SUFFIX);
|
||
stub_sec = (*htab->add_stub_section) (s_name, link_sec);
|
||
if (stub_sec == NULL)
|
||
return NULL;
|
||
htab->stub_group[link_sec->id].stub_sec = stub_sec;
|
||
}
|
||
htab->stub_group[section->id].stub_sec = stub_sec;
|
||
}
|
||
|
||
/* Enter this entry into the linker stub hash table. */
|
||
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
|
||
true, false);
|
||
if (stub_entry == NULL)
|
||
{
|
||
(*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
|
||
bfd_archive_filename (section->owner),
|
||
stub_name);
|
||
return NULL;
|
||
}
|
||
|
||
stub_entry->stub_sec = stub_sec;
|
||
stub_entry->stub_offset = 0;
|
||
stub_entry->id_sec = link_sec;
|
||
return stub_entry;
|
||
}
|
||
|
||
/* Create sections for linker generated code. */
|
||
|
||
static boolean
|
||
create_linkage_sections (dynobj, info)
|
||
bfd *dynobj;
|
||
struct bfd_link_info *info;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
flagword flags;
|
||
|
||
htab = ppc_hash_table (info);
|
||
|
||
/* Create .sfpr for code to save and restore fp regs. */
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
|
||
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
|
||
if (htab->sfpr == NULL
|
||
|| ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
|
||
|| ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
|
||
return false;
|
||
|
||
/* Create .glink for lazy dynamic linking support. */
|
||
htab->sglink = bfd_make_section_anyway (dynobj, ".glink");
|
||
if (htab->sglink == NULL
|
||
|| ! bfd_set_section_flags (dynobj, htab->sglink, flags)
|
||
|| ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
|
||
return false;
|
||
|
||
/* Create .branch_lt for plt_branch stubs. */
|
||
flags = (SEC_ALLOC | SEC_LOAD
|
||
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt");
|
||
if (htab->sbrlt == NULL
|
||
|| ! bfd_set_section_flags (dynobj, htab->sbrlt, flags)
|
||
|| ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3))
|
||
return false;
|
||
|
||
if (info->shared)
|
||
{
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
|
||
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
htab->srelbrlt = bfd_make_section (dynobj, ".rela.branch_lt");
|
||
if (!htab->srelbrlt
|
||
|| ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags)
|
||
|| ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3))
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/* Create .got and .rela.got sections in DYNOBJ, and set up
|
||
shortcuts to them in our hash table. */
|
||
|
||
static boolean
|
||
create_got_section (dynobj, info)
|
||
bfd *dynobj;
|
||
struct bfd_link_info *info;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
|
||
if (! _bfd_elf_create_got_section (dynobj, info))
|
||
return false;
|
||
|
||
htab = ppc_hash_table (info);
|
||
htab->sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
if (!htab->sgot)
|
||
abort ();
|
||
|
||
htab->srelgot = bfd_make_section (dynobj, ".rela.got");
|
||
if (!htab->srelgot
|
||
|| ! bfd_set_section_flags (dynobj, htab->srelgot,
|
||
(SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY | SEC_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
|
||
return false;
|
||
return true;
|
||
}
|
||
|
||
/* Create the dynamic sections, and set up shortcuts. */
|
||
|
||
static boolean
|
||
ppc64_elf_create_dynamic_sections (dynobj, info)
|
||
bfd *dynobj;
|
||
struct bfd_link_info *info;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
|
||
htab = ppc_hash_table (info);
|
||
if (!htab->sgot && !create_got_section (dynobj, info))
|
||
return false;
|
||
|
||
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
|
||
return false;
|
||
|
||
htab->splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
|
||
if (!info->shared)
|
||
htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
|
||
|
||
if (!htab->splt || !htab->srelplt || !htab->sdynbss
|
||
|| (!info->shared && !htab->srelbss))
|
||
abort ();
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
||
|
||
static void
|
||
ppc64_elf_copy_indirect_symbol (dir, ind)
|
||
struct elf_link_hash_entry *dir, *ind;
|
||
{
|
||
struct ppc_link_hash_entry *edir, *eind;
|
||
|
||
edir = (struct ppc_link_hash_entry *) dir;
|
||
eind = (struct ppc_link_hash_entry *) ind;
|
||
|
||
if (eind->dyn_relocs != NULL)
|
||
{
|
||
if (edir->dyn_relocs != NULL)
|
||
{
|
||
struct ppc_dyn_relocs **pp;
|
||
struct ppc_dyn_relocs *p;
|
||
|
||
if (ind->root.type == bfd_link_hash_indirect)
|
||
abort ();
|
||
|
||
/* Add reloc counts against the weak sym to the strong sym
|
||
list. Merge any entries against the same section. */
|
||
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
|
||
{
|
||
struct ppc_dyn_relocs *q;
|
||
|
||
for (q = edir->dyn_relocs; q != NULL; q = q->next)
|
||
if (q->sec == p->sec)
|
||
{
|
||
q->pc_count += p->pc_count;
|
||
q->count += p->count;
|
||
*pp = p->next;
|
||
break;
|
||
}
|
||
if (q == NULL)
|
||
pp = &p->next;
|
||
}
|
||
*pp = edir->dyn_relocs;
|
||
}
|
||
|
||
edir->dyn_relocs = eind->dyn_relocs;
|
||
eind->dyn_relocs = NULL;
|
||
}
|
||
|
||
edir->is_func |= eind->is_func;
|
||
edir->is_func_descriptor |= eind->is_func_descriptor;
|
||
|
||
_bfd_elf_link_hash_copy_indirect (dir, ind);
|
||
}
|
||
|
||
/* Look through the relocs for a section during the first phase, and
|
||
calculate needed space in the global offset table, procedure
|
||
linkage table, and dynamic reloc sections. */
|
||
|
||
static boolean
|
||
ppc64_elf_check_relocs (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
asection *sreloc;
|
||
boolean is_opd;
|
||
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
htab = ppc_hash_table (info);
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
sym_hashes_end = (sym_hashes
|
||
+ symtab_hdr->sh_size / sizeof (Elf64_External_Sym));
|
||
if (!elf_bad_symtab (abfd))
|
||
sym_hashes_end -= symtab_hdr->sh_info;
|
||
|
||
sreloc = NULL;
|
||
is_opd = strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0;
|
||
|
||
if (htab->elf.dynobj == NULL)
|
||
htab->elf.dynobj = abfd;
|
||
if (htab->sfpr == NULL
|
||
&& !create_linkage_sections (htab->elf.dynobj, info))
|
||
return false;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
enum elf_ppc_reloc_type r_type;
|
||
|
||
r_symndx = ELF64_R_SYM (rel->r_info);
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
|
||
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
||
switch (r_type)
|
||
{
|
||
/* GOT16 relocations */
|
||
case R_PPC64_GOT16:
|
||
case R_PPC64_GOT16_DS:
|
||
case R_PPC64_GOT16_HA:
|
||
case R_PPC64_GOT16_HI:
|
||
case R_PPC64_GOT16_LO:
|
||
case R_PPC64_GOT16_LO_DS:
|
||
|
||
/* This symbol requires a global offset table entry. */
|
||
if (htab->sgot == NULL
|
||
&& !create_got_section (htab->elf.dynobj, info))
|
||
return false;
|
||
|
||
if (h != NULL)
|
||
{
|
||
h->got.refcount += 1;
|
||
}
|
||
else
|
||
{
|
||
bfd_signed_vma *local_got_refcounts;
|
||
|
||
/* This is a global offset table entry for a local symbol. */
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
if (local_got_refcounts == NULL)
|
||
{
|
||
bfd_size_type size;
|
||
|
||
size = symtab_hdr->sh_info;
|
||
size *= sizeof (bfd_signed_vma);
|
||
local_got_refcounts = ((bfd_signed_vma *)
|
||
bfd_zalloc (abfd, size));
|
||
if (local_got_refcounts == NULL)
|
||
return false;
|
||
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
||
}
|
||
local_got_refcounts[r_symndx] += 1;
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_PLT16_HA:
|
||
case R_PPC64_PLT16_HI:
|
||
case R_PPC64_PLT16_LO:
|
||
case R_PPC64_PLT32:
|
||
case R_PPC64_PLT64:
|
||
/* This symbol requires a procedure linkage table entry. We
|
||
actually build the entry in adjust_dynamic_symbol,
|
||
because this might be a case of linking PIC code without
|
||
linking in any dynamic objects, in which case we don't
|
||
need to generate a procedure linkage table after all. */
|
||
if (h == NULL)
|
||
{
|
||
/* It does not make sense to have a procedure linkage
|
||
table entry for a local symbol. */
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
||
h->plt.refcount += 1;
|
||
((struct ppc_link_hash_entry *) h)->is_func = 1;
|
||
break;
|
||
|
||
/* The following relocations don't need to propagate the
|
||
relocation if linking a shared object since they are
|
||
section relative. */
|
||
case R_PPC64_SECTOFF:
|
||
case R_PPC64_SECTOFF_LO:
|
||
case R_PPC64_SECTOFF_HI:
|
||
case R_PPC64_SECTOFF_HA:
|
||
case R_PPC64_SECTOFF_DS:
|
||
case R_PPC64_SECTOFF_LO_DS:
|
||
case R_PPC64_TOC16:
|
||
case R_PPC64_TOC16_LO:
|
||
case R_PPC64_TOC16_HI:
|
||
case R_PPC64_TOC16_HA:
|
||
case R_PPC64_TOC16_DS:
|
||
case R_PPC64_TOC16_LO_DS:
|
||
break;
|
||
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_PPC64_GNU_VTINHERIT:
|
||
if (!_bfd_elf64_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_PPC64_GNU_VTENTRY:
|
||
if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return false;
|
||
break;
|
||
|
||
case R_PPC64_REL14:
|
||
case R_PPC64_REL14_BRTAKEN:
|
||
case R_PPC64_REL14_BRNTAKEN:
|
||
htab->has_14bit_branch = 1;
|
||
/* Fall through. */
|
||
|
||
case R_PPC64_REL24:
|
||
if (h != NULL
|
||
&& h->root.root.string[0] == '.'
|
||
&& h->root.root.string[1] != 0)
|
||
{
|
||
/* We may need a .plt entry if the function this reloc
|
||
refers to is in a shared lib. */
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
||
h->plt.refcount += 1;
|
||
((struct ppc_link_hash_entry *) h)->is_func = 1;
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_ADDR64:
|
||
if (is_opd
|
||
&& h != NULL
|
||
&& h->root.root.string[0] == '.'
|
||
&& h->root.root.string[1] != 0)
|
||
{
|
||
struct elf_link_hash_entry *fdh;
|
||
|
||
fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
|
||
false, false, false);
|
||
if (fdh != NULL)
|
||
{
|
||
((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
|
||
((struct ppc_link_hash_entry *) fdh)->oh = h;
|
||
((struct ppc_link_hash_entry *) h)->is_func = 1;
|
||
((struct ppc_link_hash_entry *) h)->oh = fdh;
|
||
}
|
||
}
|
||
/* Fall through. */
|
||
|
||
case R_PPC64_REL64:
|
||
case R_PPC64_REL32:
|
||
case R_PPC64_ADDR14:
|
||
case R_PPC64_ADDR14_BRNTAKEN:
|
||
case R_PPC64_ADDR14_BRTAKEN:
|
||
case R_PPC64_ADDR16:
|
||
case R_PPC64_ADDR16_DS:
|
||
case R_PPC64_ADDR16_HA:
|
||
case R_PPC64_ADDR16_HI:
|
||
case R_PPC64_ADDR16_HIGHER:
|
||
case R_PPC64_ADDR16_HIGHERA:
|
||
case R_PPC64_ADDR16_HIGHEST:
|
||
case R_PPC64_ADDR16_HIGHESTA:
|
||
case R_PPC64_ADDR16_LO:
|
||
case R_PPC64_ADDR16_LO_DS:
|
||
case R_PPC64_ADDR24:
|
||
case R_PPC64_ADDR30:
|
||
case R_PPC64_ADDR32:
|
||
case R_PPC64_UADDR16:
|
||
case R_PPC64_UADDR32:
|
||
case R_PPC64_UADDR64:
|
||
case R_PPC64_TOC:
|
||
/* Don't propagate .opd relocs. */
|
||
if (NO_OPD_RELOCS && is_opd)
|
||
break;
|
||
|
||
/* If we are creating a shared library, and this is a reloc
|
||
against a global symbol, or a non PC relative reloc
|
||
against a local symbol, then we need to copy the reloc
|
||
into the shared library. However, if we are linking with
|
||
-Bsymbolic, we do not need to copy a reloc against a
|
||
global symbol which is defined in an object we are
|
||
including in the link (i.e., DEF_REGULAR is set). At
|
||
this point we have not seen all the input files, so it is
|
||
possible that DEF_REGULAR is not set now but will be set
|
||
later (it is never cleared). In case of a weak definition,
|
||
DEF_REGULAR may be cleared later by a strong definition in
|
||
a shared library. We account for that possibility below by
|
||
storing information in the relocs_copied field of the hash
|
||
table entry. A similar situation occurs when creating
|
||
shared libraries and symbol visibility changes render the
|
||
symbol local.
|
||
|
||
If on the other hand, we are creating an executable, we
|
||
may need to keep relocations for symbols satisfied by a
|
||
dynamic library if we manage to avoid copy relocs for the
|
||
symbol. */
|
||
if ((info->shared
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& (IS_ABSOLUTE_RELOC (r_type)
|
||
|| (h != NULL
|
||
&& (! info->symbolic
|
||
|| h->root.type == bfd_link_hash_defweak
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
||
|| (!info->shared
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& h != NULL
|
||
&& (h->root.type == bfd_link_hash_defweak
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)))
|
||
{
|
||
struct ppc_dyn_relocs *p;
|
||
struct ppc_dyn_relocs **head;
|
||
|
||
/* We must copy these reloc types into the output file.
|
||
Create a reloc section in dynobj and make room for
|
||
this reloc. */
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name;
|
||
bfd *dynobj;
|
||
|
||
name = (bfd_elf_string_from_elf_section
|
||
(abfd,
|
||
elf_elfheader (abfd)->e_shstrndx,
|
||
elf_section_data (sec)->rel_hdr.sh_name));
|
||
if (name == NULL)
|
||
return false;
|
||
|
||
if (strncmp (name, ".rela", 5) != 0
|
||
|| strcmp (bfd_get_section_name (abfd, sec),
|
||
name + 5) != 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: bad relocation section name `%s\'"),
|
||
bfd_archive_filename (abfd), name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
}
|
||
|
||
dynobj = htab->elf.dynobj;
|
||
sreloc = bfd_get_section_by_name (dynobj, name);
|
||
if (sreloc == NULL)
|
||
{
|
||
flagword flags;
|
||
|
||
sreloc = bfd_make_section (dynobj, name);
|
||
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
||
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
if ((sec->flags & SEC_ALLOC) != 0)
|
||
flags |= SEC_ALLOC | SEC_LOAD;
|
||
if (sreloc == NULL
|
||
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
|
||
|| ! bfd_set_section_alignment (dynobj, sreloc, 3))
|
||
return false;
|
||
}
|
||
elf_section_data (sec)->sreloc = sreloc;
|
||
}
|
||
|
||
/* If this is a global symbol, we count the number of
|
||
relocations we need for this symbol. */
|
||
if (h != NULL)
|
||
{
|
||
head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
|
||
}
|
||
else
|
||
{
|
||
/* Track dynamic relocs needed for local syms too.
|
||
We really need local syms available to do this
|
||
easily. Oh well. */
|
||
|
||
asection *s;
|
||
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
|
||
sec, r_symndx);
|
||
if (s == NULL)
|
||
return false;
|
||
|
||
head = ((struct ppc_dyn_relocs **)
|
||
&elf_section_data (s)->local_dynrel);
|
||
}
|
||
|
||
p = *head;
|
||
if (p == NULL || p->sec != sec)
|
||
{
|
||
p = ((struct ppc_dyn_relocs *)
|
||
bfd_alloc (htab->elf.dynobj,
|
||
(bfd_size_type) sizeof *p));
|
||
if (p == NULL)
|
||
return false;
|
||
p->next = *head;
|
||
*head = p;
|
||
p->sec = sec;
|
||
p->count = 0;
|
||
p->pc_count = 0;
|
||
}
|
||
|
||
p->count += 1;
|
||
if (!IS_ABSOLUTE_RELOC (r_type))
|
||
p->pc_count += 1;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
ppc64_elf_gc_mark_hook (abfd, info, rel, h, sym)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
Elf_Internal_Rela *rel;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
enum elf_ppc_reloc_type r_type;
|
||
|
||
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
||
switch (r_type)
|
||
{
|
||
case R_PPC64_GNU_VTINHERIT:
|
||
case R_PPC64_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
return h->root.u.def.section;
|
||
|
||
case bfd_link_hash_common:
|
||
return h->root.u.c.p->section;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Update the .got, .plt. and dynamic reloc reference counts for the
|
||
section being removed. */
|
||
|
||
static boolean
|
||
ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_signed_vma *local_got_refcounts;
|
||
const Elf_Internal_Rela *rel, *relend;
|
||
|
||
elf_section_data (sec)->local_dynrel = NULL;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
|
||
relend = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < relend; rel++)
|
||
{
|
||
unsigned long r_symndx;
|
||
enum elf_ppc_reloc_type r_type;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
r_symndx = ELF64_R_SYM (rel->r_info);
|
||
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
||
switch (r_type)
|
||
{
|
||
case R_PPC64_GOT16:
|
||
case R_PPC64_GOT16_DS:
|
||
case R_PPC64_GOT16_HA:
|
||
case R_PPC64_GOT16_HI:
|
||
case R_PPC64_GOT16_LO:
|
||
case R_PPC64_GOT16_LO_DS:
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
if (h->got.refcount > 0)
|
||
h->got.refcount--;
|
||
}
|
||
else
|
||
{
|
||
if (local_got_refcounts[r_symndx] > 0)
|
||
local_got_refcounts[r_symndx]--;
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_PLT16_HA:
|
||
case R_PPC64_PLT16_HI:
|
||
case R_PPC64_PLT16_LO:
|
||
case R_PPC64_PLT32:
|
||
case R_PPC64_PLT64:
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
if (h->plt.refcount > 0)
|
||
h->plt.refcount--;
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_REL14:
|
||
case R_PPC64_REL14_BRNTAKEN:
|
||
case R_PPC64_REL14_BRTAKEN:
|
||
case R_PPC64_REL24:
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
if (h->plt.refcount > 0)
|
||
h->plt.refcount--;
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_REL32:
|
||
case R_PPC64_REL64:
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
struct ppc_link_hash_entry *eh;
|
||
struct ppc_dyn_relocs **pp;
|
||
struct ppc_dyn_relocs *p;
|
||
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
eh = (struct ppc_link_hash_entry *) h;
|
||
|
||
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
|
||
if (p->sec == sec)
|
||
{
|
||
p->pc_count -= 1;
|
||
p->count -= 1;
|
||
if (p->count == 0)
|
||
*pp = p->next;
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_ADDR14:
|
||
case R_PPC64_ADDR14_BRNTAKEN:
|
||
case R_PPC64_ADDR14_BRTAKEN:
|
||
case R_PPC64_ADDR16:
|
||
case R_PPC64_ADDR16_DS:
|
||
case R_PPC64_ADDR16_HA:
|
||
case R_PPC64_ADDR16_HI:
|
||
case R_PPC64_ADDR16_HIGHER:
|
||
case R_PPC64_ADDR16_HIGHERA:
|
||
case R_PPC64_ADDR16_HIGHEST:
|
||
case R_PPC64_ADDR16_HIGHESTA:
|
||
case R_PPC64_ADDR16_LO:
|
||
case R_PPC64_ADDR16_LO_DS:
|
||
case R_PPC64_ADDR24:
|
||
case R_PPC64_ADDR30:
|
||
case R_PPC64_ADDR32:
|
||
case R_PPC64_ADDR64:
|
||
case R_PPC64_UADDR16:
|
||
case R_PPC64_UADDR32:
|
||
case R_PPC64_UADDR64:
|
||
case R_PPC64_TOC:
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
struct ppc_link_hash_entry *eh;
|
||
struct ppc_dyn_relocs **pp;
|
||
struct ppc_dyn_relocs *p;
|
||
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
eh = (struct ppc_link_hash_entry *) h;
|
||
|
||
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
|
||
if (p->sec == sec)
|
||
{
|
||
p->count -= 1;
|
||
if (p->count == 0)
|
||
*pp = p->next;
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/* Called via elf_link_hash_traverse to transfer dynamic linking
|
||
information on function code symbol entries to their corresponding
|
||
function descriptor symbol entries. */
|
||
static boolean
|
||
func_desc_adjust (h, inf)
|
||
struct elf_link_hash_entry *h;
|
||
PTR inf;
|
||
{
|
||
struct bfd_link_info *info;
|
||
struct ppc_link_hash_table *htab;
|
||
|
||
if (h->root.type == bfd_link_hash_indirect)
|
||
return true;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
info = (struct bfd_link_info *) inf;
|
||
htab = ppc_hash_table (info);
|
||
|
||
/* If this is a function code symbol, transfer dynamic linking
|
||
information to the function descriptor symbol. */
|
||
if (!((struct ppc_link_hash_entry *) h)->is_func)
|
||
return true;
|
||
|
||
if (h->root.type == bfd_link_hash_undefweak
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
|
||
htab->have_undefweak = true;
|
||
|
||
if (h->plt.refcount > 0
|
||
&& h->root.root.string[0] == '.'
|
||
&& h->root.root.string[1] != '\0')
|
||
{
|
||
struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
|
||
boolean force_local;
|
||
|
||
/* Find the corresponding function descriptor symbol. Create it
|
||
as undefined if necessary. */
|
||
|
||
if (fdh == NULL)
|
||
fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
|
||
false, false, true);
|
||
|
||
if (fdh == NULL
|
||
&& info->shared
|
||
&& (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak))
|
||
{
|
||
bfd *abfd;
|
||
asymbol *newsym;
|
||
|
||
abfd = h->root.u.undef.abfd;
|
||
newsym = bfd_make_empty_symbol (abfd);
|
||
newsym->name = h->root.root.string + 1;
|
||
newsym->section = bfd_und_section_ptr;
|
||
newsym->value = 0;
|
||
newsym->flags = BSF_OBJECT;
|
||
if (h->root.type == bfd_link_hash_undefweak)
|
||
newsym->flags |= BSF_WEAK;
|
||
|
||
if ( !(_bfd_generic_link_add_one_symbol
|
||
(info, abfd, newsym->name, newsym->flags,
|
||
newsym->section, newsym->value, NULL, false, false,
|
||
(struct bfd_link_hash_entry **) &fdh)))
|
||
{
|
||
return false;
|
||
}
|
||
fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
|
||
}
|
||
|
||
if (fdh != NULL
|
||
&& (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
|
||
&& (info->shared
|
||
|| (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
|| (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
|
||
{
|
||
if (fdh->dynindx == -1)
|
||
if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
|
||
return false;
|
||
fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
|
||
& (ELF_LINK_HASH_REF_REGULAR
|
||
| ELF_LINK_HASH_REF_DYNAMIC
|
||
| ELF_LINK_HASH_REF_REGULAR_NONWEAK
|
||
| ELF_LINK_NON_GOT_REF));
|
||
if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
||
{
|
||
fdh->plt.refcount = h->plt.refcount;
|
||
fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
||
}
|
||
((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
|
||
((struct ppc_link_hash_entry *) fdh)->oh = h;
|
||
((struct ppc_link_hash_entry *) h)->oh = fdh;
|
||
}
|
||
|
||
/* Now that the info is on the function descriptor, clear the
|
||
function code sym info. Any function code syms for which we
|
||
don't have a definition in a regular file, we force local.
|
||
This prevents a shared library from exporting syms that have
|
||
been imported from another library. Function code syms that
|
||
are really in the library we must leave global to prevent the
|
||
linker dragging in a definition from a static library. */
|
||
force_local = (info->shared
|
||
&& ((h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0
|
||
|| fdh == NULL
|
||
|| (fdh->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0
|
||
|| (fdh->elf_link_hash_flags
|
||
& ELF_LINK_FORCED_LOCAL) != 0));
|
||
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
#define MIN_SAVE_FPR 14
|
||
#define MAX_SAVE_FPR 31
|
||
|
||
/* Called near the start of bfd_elf_size_dynamic_sections. We use
|
||
this hook to a) provide some gcc support functions, and b) transfer
|
||
dynamic linking information gathered so far on function code symbol
|
||
entries, to their corresponding function descriptor symbol entries. */
|
||
static boolean
|
||
ppc64_elf_func_desc_adjust (obfd, info)
|
||
bfd *obfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *info;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
unsigned int lowest_savef = MAX_SAVE_FPR + 2;
|
||
unsigned int lowest_restf = MAX_SAVE_FPR + 2;
|
||
unsigned int i;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_byte *p;
|
||
char sym[10];
|
||
|
||
htab = ppc_hash_table (info);
|
||
|
||
if (htab->sfpr == NULL)
|
||
/* We don't have any relocs. */
|
||
return true;
|
||
|
||
/* First provide any missing ._savef* and ._restf* functions. */
|
||
memcpy (sym, "._savef14", 10);
|
||
for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
|
||
{
|
||
sym[7] = i / 10 + '0';
|
||
sym[8] = i % 10 + '0';
|
||
h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
|
||
if (h != NULL
|
||
&& h->root.type == bfd_link_hash_undefined)
|
||
{
|
||
if (lowest_savef > i)
|
||
lowest_savef = i;
|
||
h->root.type = bfd_link_hash_defined;
|
||
h->root.u.def.section = htab->sfpr;
|
||
h->root.u.def.value = (i - lowest_savef) * 4;
|
||
h->type = STT_FUNC;
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
||
_bfd_elf_link_hash_hide_symbol (info, h, info->shared);
|
||
}
|
||
}
|
||
|
||
memcpy (sym, "._restf14", 10);
|
||
for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
|
||
{
|
||
sym[7] = i / 10 + '0';
|
||
sym[8] = i % 10 + '0';
|
||
h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
|
||
if (h != NULL
|
||
&& h->root.type == bfd_link_hash_undefined)
|
||
{
|
||
if (lowest_restf > i)
|
||
lowest_restf = i;
|
||
h->root.type = bfd_link_hash_defined;
|
||
h->root.u.def.section = htab->sfpr;
|
||
h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
|
||
+ (i - lowest_restf) * 4);
|
||
h->type = STT_FUNC;
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
||
_bfd_elf_link_hash_hide_symbol (info, h, info->shared);
|
||
}
|
||
}
|
||
|
||
elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
|
||
|
||
htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
|
||
+ (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
|
||
|
||
if (htab->sfpr->_raw_size == 0)
|
||
{
|
||
if (!htab->have_undefweak)
|
||
{
|
||
_bfd_strip_section_from_output (info, htab->sfpr);
|
||
return true;
|
||
}
|
||
|
||
htab->sfpr->_raw_size = 4;
|
||
}
|
||
|
||
p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
|
||
if (p == NULL)
|
||
return false;
|
||
htab->sfpr->contents = p;
|
||
|
||
for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
|
||
{
|
||
unsigned int fpr = i << 21;
|
||
unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
|
||
bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
|
||
p += 4;
|
||
}
|
||
if (lowest_savef <= MAX_SAVE_FPR)
|
||
{
|
||
bfd_put_32 (htab->elf.dynobj, BLR, p);
|
||
p += 4;
|
||
}
|
||
|
||
for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
|
||
{
|
||
unsigned int fpr = i << 21;
|
||
unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
|
||
bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
|
||
p += 4;
|
||
}
|
||
if (lowest_restf <= MAX_SAVE_FPR
|
||
|| htab->sfpr->_raw_size == 4)
|
||
{
|
||
bfd_put_32 (htab->elf.dynobj, BLR, p);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* 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 boolean
|
||
ppc64_elf_adjust_dynamic_symbol (info, h)
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
struct ppc_link_hash_entry * eh;
|
||
struct ppc_dyn_relocs *p;
|
||
asection *s;
|
||
unsigned int power_of_two;
|
||
|
||
htab = ppc_hash_table (info);
|
||
|
||
/* Deal with function syms. */
|
||
if (h->type == STT_FUNC
|
||
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
||
{
|
||
/* Clear procedure linkage table information for any symbol that
|
||
won't need a .plt entry. */
|
||
if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
|
||
|| h->plt.refcount <= 0
|
||
|| (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|
||
|| (! info->shared
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
|
||
{
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
||
}
|
||
return true;
|
||
}
|
||
else
|
||
h->plt.offset = (bfd_vma) -1;
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
if (h->weakdef != NULL)
|
||
{
|
||
BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
|
||
|| h->weakdef->root.type == bfd_link_hash_defweak);
|
||
h->root.u.def.section = h->weakdef->root.u.def.section;
|
||
h->root.u.def.value = h->weakdef->root.u.def.value;
|
||
return true;
|
||
}
|
||
|
||
/* This is a reference to a symbol defined by a dynamic object which
|
||
is not a function. */
|
||
|
||
/* If we are creating a shared library, we must presume that the
|
||
only references to the symbol are via the global offset table.
|
||
For such cases we need not do anything here; the relocations will
|
||
be handled correctly by relocate_section. */
|
||
if (info->shared)
|
||
return true;
|
||
|
||
/* If there are no references to this symbol that do not use the
|
||
GOT, we don't need to generate a copy reloc. */
|
||
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
|
||
return true;
|
||
|
||
eh = (struct ppc_link_hash_entry *) h;
|
||
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
||
{
|
||
s = p->sec->output_section;
|
||
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
||
break;
|
||
}
|
||
|
||
/* If we didn't find any dynamic relocs in read-only sections, then
|
||
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
|
||
if (p == NULL)
|
||
{
|
||
h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
|
||
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_PPC_COPY reloc to tell the dynamic linker to
|
||
copy the initial value out of the dynamic object and into the
|
||
runtime process image. We need to remember the offset into the
|
||
.rela.bss section we are going to use. */
|
||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
|
||
}
|
||
|
||
/* We need to figure out the alignment required for this symbol. I
|
||
have no idea how ELF linkers handle this. */
|
||
power_of_two = bfd_log2 (h->size);
|
||
if (power_of_two > 4)
|
||
power_of_two = 4;
|
||
|
||
/* Apply the required alignment. */
|
||
s = htab->sdynbss;
|
||
s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
|
||
if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
|
||
{
|
||
if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
|
||
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->_raw_size;
|
||
|
||
/* Increment the section size to make room for the symbol. */
|
||
s->_raw_size += h->size;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* If given a function descriptor symbol, hide both the function code
|
||
sym and the descriptor. */
|
||
static void
|
||
ppc64_elf_hide_symbol (info, h, force_local)
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
boolean force_local;
|
||
{
|
||
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
|
||
|
||
if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
|
||
{
|
||
struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
|
||
|
||
if (fh == NULL)
|
||
{
|
||
const char *p, *q;
|
||
struct ppc_link_hash_table *htab;
|
||
char save;
|
||
|
||
/* We aren't supposed to use alloca in BFD because on
|
||
systems which do not have alloca the version in libiberty
|
||
calls xmalloc, which might cause the program to crash
|
||
when it runs out of memory. This function doesn't have a
|
||
return status, so there's no way to gracefully return an
|
||
error. So cheat. We know that string[-1] can be safely
|
||
dereferenced; It's either a string in an ELF string
|
||
table, or allocated in an objalloc structure. */
|
||
|
||
p = h->root.root.string - 1;
|
||
save = *p;
|
||
*(char *) p = '.';
|
||
htab = ppc_hash_table (info);
|
||
fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
|
||
*(char *) p = save;
|
||
|
||
/* Unfortunately, if it so happens that the string we were
|
||
looking for was allocated immediately before this string,
|
||
then we overwrote the string terminator. That's the only
|
||
reason the lookup should fail. */
|
||
if (fh == NULL)
|
||
{
|
||
q = h->root.root.string + strlen (h->root.root.string);
|
||
while (q >= h->root.root.string && *q == *p)
|
||
--q, --p;
|
||
if (q < h->root.root.string && *p == '.')
|
||
fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
|
||
}
|
||
if (fh != NULL)
|
||
{
|
||
((struct ppc_link_hash_entry *) h)->oh = fh;
|
||
((struct ppc_link_hash_entry *) fh)->oh = h;
|
||
}
|
||
}
|
||
if (fh != NULL)
|
||
_bfd_elf_link_hash_hide_symbol (info, fh, force_local);
|
||
}
|
||
}
|
||
|
||
/* This is the condition under which ppc64_elf_finish_dynamic_symbol
|
||
will be called from elflink.h. If elflink.h doesn't call our
|
||
finish_dynamic_symbol routine, we'll need to do something about
|
||
initializing any .plt and .got entries in ppc64_elf_relocate_section. */
|
||
#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
|
||
((DYN) \
|
||
&& ((INFO)->shared \
|
||
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
|
||
&& ((H)->dynindx != -1 \
|
||
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
|
||
|
||
/* Allocate space in .plt, .got and associated reloc sections for
|
||
dynamic relocs. */
|
||
|
||
static boolean
|
||
allocate_dynrelocs (h, inf)
|
||
struct elf_link_hash_entry *h;
|
||
PTR inf;
|
||
{
|
||
struct bfd_link_info *info;
|
||
struct ppc_link_hash_table *htab;
|
||
asection *s;
|
||
struct ppc_link_hash_entry *eh;
|
||
struct ppc_dyn_relocs *p;
|
||
|
||
if (h->root.type == bfd_link_hash_indirect)
|
||
return true;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
info = (struct bfd_link_info *) inf;
|
||
htab = ppc_hash_table (info);
|
||
|
||
if (htab->elf.dynamic_sections_created
|
||
&& h->plt.refcount > 0
|
||
&& h->dynindx != -1)
|
||
{
|
||
BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
|
||
|
||
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
|
||
{
|
||
/* If this is the first .plt entry, make room for the special
|
||
first entry. */
|
||
s = htab->splt;
|
||
if (s->_raw_size == 0)
|
||
s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
|
||
|
||
h->plt.offset = s->_raw_size;
|
||
|
||
/* Make room for this entry. */
|
||
s->_raw_size += PLT_ENTRY_SIZE;
|
||
|
||
/* Make room for the .glink code. */
|
||
s = htab->sglink;
|
||
if (s->_raw_size == 0)
|
||
s->_raw_size += GLINK_CALL_STUB_SIZE;
|
||
/* We need bigger stubs past index 32767. */
|
||
if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
|
||
s->_raw_size += 4;
|
||
s->_raw_size += 2*4;
|
||
|
||
/* We also need to make an entry in the .rela.plt section. */
|
||
s = htab->srelplt;
|
||
s->_raw_size += sizeof (Elf64_External_Rela);
|
||
}
|
||
else
|
||
{
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
h->plt.offset = (bfd_vma) -1;
|
||
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
||
}
|
||
|
||
if (h->got.refcount > 0)
|
||
{
|
||
boolean dyn;
|
||
|
||
/* 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->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
|
||
{
|
||
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
s = htab->sgot;
|
||
h->got.offset = s->_raw_size;
|
||
s->_raw_size += 8;
|
||
dyn = htab->elf.dynamic_sections_created;
|
||
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
|
||
htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
|
||
}
|
||
else
|
||
h->got.offset = (bfd_vma) -1;
|
||
|
||
eh = (struct ppc_link_hash_entry *) h;
|
||
if (eh->dyn_relocs == NULL)
|
||
return true;
|
||
|
||
/* In the shared -Bsymbolic case, discard space allocated for
|
||
dynamic pc-relative relocs against symbols which turn out to be
|
||
defined in regular objects. For the normal shared case, discard
|
||
space for relocs that have become local due to symbol visibility
|
||
changes. */
|
||
|
||
if (info->shared)
|
||
{
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
|
||
&& ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|
||
|| info->symbolic))
|
||
{
|
||
struct ppc_dyn_relocs **pp;
|
||
|
||
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
|
||
{
|
||
p->count -= p->pc_count;
|
||
p->pc_count = 0;
|
||
if (p->count == 0)
|
||
*pp = p->next;
|
||
else
|
||
pp = &p->next;
|
||
}
|
||
}
|
||
}
|
||
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->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
|
||
&& (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
|| (htab->elf.dynamic_sections_created
|
||
&& (h->root.type == bfd_link_hash_undefweak
|
||
|| h->root.type == bfd_link_hash_undefined))))
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol.
|
||
Undefined weak syms won't yet be marked as dynamic. */
|
||
if (h->dynindx == -1
|
||
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
|
||
{
|
||
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
/* If that succeeded, we know we'll be keeping all the
|
||
relocs. */
|
||
if (h->dynindx != -1)
|
||
goto keep;
|
||
}
|
||
|
||
eh->dyn_relocs = NULL;
|
||
|
||
keep: ;
|
||
}
|
||
|
||
/* Finally, allocate space. */
|
||
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
||
{
|
||
asection *sreloc = elf_section_data (p->sec)->sreloc;
|
||
sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Find any dynamic relocs that apply to read-only sections. */
|
||
|
||
static boolean
|
||
readonly_dynrelocs (h, inf)
|
||
struct elf_link_hash_entry *h;
|
||
PTR inf;
|
||
{
|
||
struct ppc_link_hash_entry *eh;
|
||
struct ppc_dyn_relocs *p;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
eh = (struct ppc_link_hash_entry *) h;
|
||
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
||
{
|
||
asection *s = p->sec->output_section;
|
||
|
||
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
||
{
|
||
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
||
|
||
info->flags |= DF_TEXTREL;
|
||
|
||
/* Not an error, just cut short the traversal. */
|
||
return false;
|
||
}
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static boolean
|
||
ppc64_elf_size_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *info;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
bfd *dynobj;
|
||
asection *s;
|
||
boolean relocs;
|
||
bfd *ibfd;
|
||
|
||
htab = ppc_hash_table (info);
|
||
dynobj = htab->elf.dynobj;
|
||
if (dynobj == NULL)
|
||
abort ();
|
||
|
||
if (htab->elf.dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (! info->shared)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, ".interp");
|
||
if (s == NULL)
|
||
abort ();
|
||
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
}
|
||
|
||
/* Set up .got offsets for local syms, and space for local dynamic
|
||
relocs. */
|
||
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
|
||
{
|
||
bfd_signed_vma *local_got;
|
||
bfd_signed_vma *end_local_got;
|
||
bfd_size_type locsymcount;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
asection *srel;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
|
||
continue;
|
||
|
||
for (s = ibfd->sections; s != NULL; s = s->next)
|
||
{
|
||
struct ppc_dyn_relocs *p;
|
||
|
||
for (p = *((struct ppc_dyn_relocs **)
|
||
&elf_section_data (s)->local_dynrel);
|
||
p != NULL;
|
||
p = p->next)
|
||
{
|
||
if (!bfd_is_abs_section (p->sec)
|
||
&& bfd_is_abs_section (p->sec->output_section))
|
||
{
|
||
/* Input section has been discarded, either because
|
||
it is a copy of a linkonce section or due to
|
||
linker script /DISCARD/, so we'll be discarding
|
||
the relocs too. */
|
||
}
|
||
else if (p->count != 0)
|
||
{
|
||
srel = elf_section_data (p->sec)->sreloc;
|
||
srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
|
||
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
|
||
info->flags |= DF_TEXTREL;
|
||
}
|
||
}
|
||
}
|
||
|
||
local_got = elf_local_got_refcounts (ibfd);
|
||
if (!local_got)
|
||
continue;
|
||
|
||
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
||
locsymcount = symtab_hdr->sh_info;
|
||
end_local_got = local_got + locsymcount;
|
||
s = htab->sgot;
|
||
srel = htab->srelgot;
|
||
for (; local_got < end_local_got; ++local_got)
|
||
{
|
||
if (*local_got > 0)
|
||
{
|
||
*local_got = s->_raw_size;
|
||
s->_raw_size += 8;
|
||
if (info->shared)
|
||
srel->_raw_size += sizeof (Elf64_External_Rela);
|
||
}
|
||
else
|
||
*local_got = (bfd_vma) -1;
|
||
}
|
||
}
|
||
|
||
/* Allocate global sym .plt and .got entries, and space for global
|
||
sym dynamic relocs. */
|
||
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
|
||
|
||
/* We now have determined the sizes of the various dynamic sections.
|
||
Allocate memory for them. */
|
||
relocs = false;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
||
continue;
|
||
|
||
if (s == htab->sbrlt || s == htab->srelbrlt)
|
||
/* These haven't been allocated yet; don't strip. */
|
||
continue;
|
||
else if (s == htab->splt
|
||
|| s == htab->sgot
|
||
|| s == htab->sglink)
|
||
{
|
||
/* Strip this section if we don't need it; see the
|
||
comment below. */
|
||
}
|
||
else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
|
||
{
|
||
if (s->_raw_size == 0)
|
||
{
|
||
/* If we don't need this section, strip it from the
|
||
output file. This is mostly to handle .rela.bss and
|
||
.rela.plt. We must create both sections in
|
||
create_dynamic_sections, because they must be created
|
||
before the linker maps input sections to output
|
||
sections. The linker does that before
|
||
adjust_dynamic_symbol is called, and it is that
|
||
function which decides whether anything needs to go
|
||
into these sections. */
|
||
}
|
||
else
|
||
{
|
||
if (s != htab->srelplt)
|
||
relocs = true;
|
||
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
s->reloc_count = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (s->_raw_size == 0)
|
||
{
|
||
_bfd_strip_section_from_output (info, s);
|
||
continue;
|
||
}
|
||
|
||
/* .plt is in the bss section. We don't initialise it. */
|
||
if ((s->flags & SEC_LOAD) == 0)
|
||
continue;
|
||
|
||
/* Allocate memory for the section contents. We use bfd_zalloc
|
||
here in case unused entries are not reclaimed before the
|
||
section's contents are written out. This should not happen,
|
||
but this way if it does, we get a R_PPC64_NONE reloc instead
|
||
of garbage. */
|
||
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
|
||
if (s->contents == NULL)
|
||
return false;
|
||
}
|
||
|
||
if (htab->elf.dynamic_sections_created)
|
||
{
|
||
/* Add some entries to the .dynamic section. We fill in the
|
||
values later, in ppc64_elf_finish_dynamic_sections, but we
|
||
must add the entries now so that we get the correct size for
|
||
the .dynamic section. The DT_DEBUG entry is filled in by the
|
||
dynamic linker and used by the debugger. */
|
||
#define add_dynamic_entry(TAG, VAL) \
|
||
bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
|
||
|
||
if (!info->shared)
|
||
{
|
||
if (!add_dynamic_entry (DT_DEBUG, 0))
|
||
return false;
|
||
}
|
||
|
||
if (htab->splt != NULL && htab->splt->_raw_size != 0)
|
||
{
|
||
if (!add_dynamic_entry (DT_PLTGOT, 0)
|
||
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
||
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
||
|| !add_dynamic_entry (DT_JMPREL, 0)
|
||
|| !add_dynamic_entry (DT_PPC64_GLINK, 0))
|
||
return false;
|
||
}
|
||
|
||
if (NO_OPD_RELOCS)
|
||
{
|
||
if (!add_dynamic_entry (DT_PPC64_OPD, 0)
|
||
|| !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
|
||
return false;
|
||
}
|
||
|
||
if (relocs)
|
||
{
|
||
if (!add_dynamic_entry (DT_RELA, 0)
|
||
|| !add_dynamic_entry (DT_RELASZ, 0)
|
||
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
|
||
return false;
|
||
|
||
/* If any dynamic relocs apply to a read-only section,
|
||
then we need a DT_TEXTREL entry. */
|
||
if ((info->flags & DF_TEXTREL) == 0)
|
||
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
|
||
(PTR) info);
|
||
|
||
if ((info->flags & DF_TEXTREL) != 0)
|
||
{
|
||
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
#undef add_dynamic_entry
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Determine the type of stub needed, if any, for a call. */
|
||
|
||
static INLINE enum ppc_stub_type
|
||
ppc_type_of_stub (input_sec, rel, hash, destination)
|
||
asection *input_sec;
|
||
const Elf_Internal_Rela *rel;
|
||
struct ppc_link_hash_entry **hash;
|
||
bfd_vma destination;
|
||
{
|
||
struct ppc_link_hash_entry *h = *hash;
|
||
bfd_vma location;
|
||
bfd_vma branch_offset;
|
||
bfd_vma max_branch_offset;
|
||
unsigned int r_type;
|
||
|
||
if (h != NULL)
|
||
{
|
||
if (h->oh != NULL
|
||
&& h->oh->plt.offset != (bfd_vma) -1
|
||
&& h->oh->dynindx != -1)
|
||
{
|
||
*hash = (struct ppc_link_hash_entry *) h->oh;
|
||
return ppc_stub_plt_call;
|
||
}
|
||
|
||
if (h->elf.root.type == bfd_link_hash_undefweak
|
||
|| h->elf.root.type == bfd_link_hash_undefined)
|
||
return ppc_stub_none;
|
||
}
|
||
|
||
/* Determine where the call point is. */
|
||
location = (input_sec->output_offset
|
||
+ input_sec->output_section->vma
|
||
+ rel->r_offset);
|
||
|
||
branch_offset = destination - location;
|
||
r_type = ELF64_R_TYPE (rel->r_info);
|
||
|
||
/* Determine if a long branch stub is needed. */
|
||
max_branch_offset = 1 << 25;
|
||
if (r_type != (unsigned int) R_PPC64_REL24)
|
||
max_branch_offset = 1 << 15;
|
||
|
||
if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
|
||
/* We need a stub. Figure out whether a long_branch or plt_branch
|
||
is needed later. */
|
||
return ppc_stub_long_branch;
|
||
|
||
return ppc_stub_none;
|
||
}
|
||
|
||
/* Build a .plt call stub. */
|
||
|
||
static bfd_byte *
|
||
build_plt_stub (obfd, p, offset, glink)
|
||
bfd *obfd;
|
||
bfd_byte *p;
|
||
int offset;
|
||
int glink;
|
||
{
|
||
#define PPC_LO(v) ((v) & 0xffff)
|
||
#define PPC_HI(v) (((v) >> 16) & 0xffff)
|
||
#define PPC_HA(v) PPC_HI ((v) + 0x8000)
|
||
|
||
if (glink)
|
||
bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
|
||
bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
|
||
if (!glink)
|
||
bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
|
||
bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
|
||
if (PPC_HA (offset + 8) != PPC_HA (offset))
|
||
bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
|
||
offset += 8;
|
||
bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
|
||
if (PPC_HA (offset + 8) != PPC_HA (offset))
|
||
bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
|
||
offset += 8;
|
||
bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
|
||
bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
|
||
bfd_put_32 (obfd, BCTR, p), p += 4;
|
||
return p;
|
||
}
|
||
|
||
static boolean
|
||
ppc_build_one_stub (gen_entry, in_arg)
|
||
struct bfd_hash_entry *gen_entry;
|
||
PTR in_arg;
|
||
{
|
||
struct ppc_stub_hash_entry *stub_entry;
|
||
struct ppc_branch_hash_entry *br_entry;
|
||
struct bfd_link_info *info;
|
||
struct ppc_link_hash_table *htab;
|
||
asection *stub_sec;
|
||
bfd *stub_bfd;
|
||
bfd_byte *loc;
|
||
bfd_byte *p;
|
||
unsigned int indx;
|
||
bfd_vma off;
|
||
int size;
|
||
|
||
/* Massage our args to the form they really have. */
|
||
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
|
||
info = (struct bfd_link_info *) in_arg;
|
||
|
||
htab = ppc_hash_table (info);
|
||
stub_sec = stub_entry->stub_sec;
|
||
|
||
/* Make a note of the offset within the stubs for this entry. */
|
||
stub_entry->stub_offset = stub_sec->_cooked_size;
|
||
loc = stub_sec->contents + stub_entry->stub_offset;
|
||
|
||
stub_bfd = stub_sec->owner;
|
||
|
||
switch (stub_entry->stub_type)
|
||
{
|
||
case ppc_stub_long_branch:
|
||
/* Branches are relative. This is where we are going to. */
|
||
off = (stub_entry->target_value
|
||
+ stub_entry->target_section->output_offset
|
||
+ stub_entry->target_section->output_section->vma);
|
||
|
||
/* And this is where we are coming from. */
|
||
off -= (stub_entry->stub_offset
|
||
+ stub_sec->output_offset
|
||
+ stub_sec->output_section->vma);
|
||
|
||
BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
|
||
|
||
bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
|
||
size = 4;
|
||
break;
|
||
|
||
case ppc_stub_plt_branch:
|
||
br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
|
||
stub_entry->root.string + 9,
|
||
false, false);
|
||
if (br_entry == NULL)
|
||
{
|
||
(*_bfd_error_handler) (_("can't find branch stub `%s'"),
|
||
stub_entry->root.string + 9);
|
||
htab->stub_error = true;
|
||
return false;
|
||
}
|
||
|
||
off = (stub_entry->target_value
|
||
+ stub_entry->target_section->output_offset
|
||
+ stub_entry->target_section->output_section->vma);
|
||
|
||
bfd_put_64 (htab->sbrlt->owner, off,
|
||
htab->sbrlt->contents + br_entry->offset);
|
||
|
||
if (info->shared)
|
||
{
|
||
/* Create a reloc for the branch lookup table entry. */
|
||
Elf_Internal_Rela rela;
|
||
Elf64_External_Rela *r;
|
||
|
||
rela.r_offset = (br_entry->offset
|
||
+ htab->sbrlt->output_offset
|
||
+ htab->sbrlt->output_section->vma);
|
||
rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
|
||
rela.r_addend = off;
|
||
|
||
r = (Elf64_External_Rela *) htab->srelbrlt->contents;
|
||
r += htab->srelbrlt->reloc_count++;
|
||
bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r);
|
||
}
|
||
|
||
off = (br_entry->offset
|
||
+ htab->sbrlt->output_offset
|
||
+ htab->sbrlt->output_section->vma
|
||
- elf_gp (htab->sbrlt->output_section->owner)
|
||
- TOC_BASE_OFF);
|
||
|
||
if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("linkage table error against `%s'"),
|
||
stub_entry->root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
htab->stub_error = true;
|
||
return false;
|
||
}
|
||
|
||
indx = off;
|
||
bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
|
||
bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4);
|
||
bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8);
|
||
bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12);
|
||
size = 16;
|
||
break;
|
||
|
||
case ppc_stub_plt_call:
|
||
/* Build the .glink lazy link call stub. */
|
||
p = htab->sglink->contents + htab->sglink->_cooked_size;
|
||
indx = htab->sglink->reloc_count;
|
||
if (indx < 0x8000)
|
||
{
|
||
bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
|
||
p += 4;
|
||
}
|
||
else
|
||
{
|
||
bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
|
||
p += 4;
|
||
bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
|
||
p += 4;
|
||
}
|
||
bfd_put_32 (htab->sglink->owner,
|
||
B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
|
||
p += 4;
|
||
htab->sglink->_cooked_size = p - htab->sglink->contents;
|
||
htab->sglink->reloc_count += 1;
|
||
|
||
/* Do the best we can for shared libraries built without
|
||
exporting ".foo" for each "foo". This can happen when symbol
|
||
versioning scripts strip all bar a subset of symbols. */
|
||
if (stub_entry->h->oh->root.type != bfd_link_hash_defined
|
||
&& stub_entry->h->oh->root.type != bfd_link_hash_defweak)
|
||
{
|
||
/* Point the symbol at the stub. There may be multiple stubs,
|
||
we don't really care; The main thing is to make this sym
|
||
defined somewhere. */
|
||
stub_entry->h->oh->root.type = bfd_link_hash_defined;
|
||
stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
|
||
stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
|
||
}
|
||
|
||
/* Now build the stub. */
|
||
off = stub_entry->h->elf.plt.offset;
|
||
if (off >= (bfd_vma) -2)
|
||
abort ();
|
||
|
||
off &= ~ (bfd_vma) 1;
|
||
off += (htab->splt->output_offset
|
||
+ htab->splt->output_section->vma
|
||
- elf_gp (htab->splt->output_section->owner)
|
||
- TOC_BASE_OFF);
|
||
|
||
if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("linkage table error against `%s'"),
|
||
stub_entry->h->elf.root.root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
htab->stub_error = true;
|
||
return false;
|
||
}
|
||
|
||
p = build_plt_stub (stub_bfd, loc, (int) off, 0);
|
||
size = p - loc;
|
||
break;
|
||
|
||
default:
|
||
BFD_FAIL ();
|
||
return false;
|
||
}
|
||
|
||
stub_sec->_cooked_size += size;
|
||
return true;
|
||
}
|
||
|
||
/* As above, but don't actually build the stub. Just bump offset so
|
||
we know stub section sizes, and select plt_branch stubs where
|
||
long_branch stubs won't do. */
|
||
|
||
static boolean
|
||
ppc_size_one_stub (gen_entry, in_arg)
|
||
struct bfd_hash_entry *gen_entry;
|
||
PTR in_arg;
|
||
{
|
||
struct ppc_stub_hash_entry *stub_entry;
|
||
struct ppc_link_hash_table *htab;
|
||
bfd_vma off;
|
||
int size;
|
||
|
||
/* Massage our args to the form they really have. */
|
||
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
|
||
htab = (struct ppc_link_hash_table *) in_arg;
|
||
|
||
if (stub_entry->stub_type == ppc_stub_plt_call)
|
||
{
|
||
off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1;
|
||
off += (htab->splt->output_offset
|
||
+ htab->splt->output_section->vma
|
||
- elf_gp (htab->splt->output_section->owner)
|
||
- TOC_BASE_OFF);
|
||
|
||
size = 28;
|
||
if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
|
||
size += 4;
|
||
}
|
||
else
|
||
{
|
||
/* ppc_stub_long_branch or ppc_stub_plt_branch. */
|
||
stub_entry->stub_type = ppc_stub_long_branch;
|
||
size = 4;
|
||
|
||
off = (stub_entry->target_value
|
||
+ stub_entry->target_section->output_offset
|
||
+ stub_entry->target_section->output_section->vma);
|
||
off -= (stub_entry->stub_sec->_raw_size
|
||
+ stub_entry->stub_sec->output_offset
|
||
+ stub_entry->stub_sec->output_section->vma);
|
||
|
||
if (off + (1 << 25) >= (bfd_vma) (1 << 26))
|
||
{
|
||
struct ppc_branch_hash_entry *br_entry;
|
||
|
||
br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
|
||
stub_entry->root.string + 9,
|
||
true, false);
|
||
if (br_entry == NULL)
|
||
{
|
||
(*_bfd_error_handler) (_("can't build branch stub `%s'"),
|
||
stub_entry->root.string + 9);
|
||
htab->stub_error = true;
|
||
return false;
|
||
}
|
||
|
||
if (br_entry->iter != htab->stub_iteration)
|
||
{
|
||
br_entry->iter = htab->stub_iteration;
|
||
br_entry->offset = htab->sbrlt->_raw_size;
|
||
htab->sbrlt->_raw_size += 8;
|
||
}
|
||
stub_entry->stub_type = ppc_stub_plt_branch;
|
||
size = 16;
|
||
}
|
||
}
|
||
|
||
stub_entry->stub_sec->_raw_size += size;
|
||
return true;
|
||
}
|
||
|
||
/* 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
|
||
ppc64_elf_setup_section_lists (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *input_bfd;
|
||
unsigned int bfd_count;
|
||
int top_id, top_index;
|
||
asection *section;
|
||
asection **input_list, **list;
|
||
bfd_size_type amt;
|
||
struct ppc_link_hash_table *htab = ppc_hash_table (info);
|
||
|
||
if (htab->elf.root.creator->flavour != bfd_target_elf_flavour
|
||
|| htab->sbrlt == NULL)
|
||
return 0;
|
||
|
||
/* 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 = (struct map_stub *) 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
|
||
_bfd_strip_section_from_output 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 = (asection **) 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)
|
||
{
|
||
if ((section->flags & SEC_CODE) != 0)
|
||
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
|
||
ppc64_elf_next_input_section (info, isec)
|
||
struct bfd_link_info *info;
|
||
asection *isec;
|
||
{
|
||
struct ppc_link_hash_table *htab = ppc_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 link_sec pointer for our list. */
|
||
#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
|
||
/* This happens to make the list in reverse order,
|
||
which is what we want. */
|
||
PREV_SEC (isec) = *list;
|
||
*list = isec;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* 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 beginning 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. */
|
||
|
||
static void
|
||
group_sections (htab, stub_group_size, stubs_always_before_branch)
|
||
struct ppc_link_hash_table *htab;
|
||
bfd_size_type stub_group_size;
|
||
boolean stubs_always_before_branch;
|
||
{
|
||
asection **list = htab->input_list + htab->top_index;
|
||
do
|
||
{
|
||
asection *tail = *list;
|
||
if (tail == bfd_abs_section_ptr)
|
||
continue;
|
||
while (tail != NULL)
|
||
{
|
||
asection *curr;
|
||
asection *prev;
|
||
bfd_size_type total;
|
||
|
||
curr = tail;
|
||
if (tail->_cooked_size)
|
||
total = tail->_cooked_size;
|
||
else
|
||
total = tail->_raw_size;
|
||
while ((prev = PREV_SEC (curr)) != NULL
|
||
&& ((total += curr->output_offset - prev->output_offset)
|
||
< stub_group_size))
|
||
curr = prev;
|
||
|
||
/* OK, the size from the start of CURR to the end is less
|
||
than stub_group_size and thus can be handled by one stub
|
||
section. (or the tail section is itself larger than
|
||
stub_group_size, in which case we may be toast.) We
|
||
should really be keeping track of the total size of stubs
|
||
added here, as stubs contribute to the final output
|
||
section size. That's a little tricky, and this way will
|
||
only break if stubs added make the total size more than
|
||
2^25, ie. for the default stub_group_size, if stubs total
|
||
more than 2834432 bytes, or over 100000 plt call stubs. */
|
||
do
|
||
{
|
||
prev = PREV_SEC (tail);
|
||
/* Set up this stub group. */
|
||
htab->stub_group[tail->id].link_sec = curr;
|
||
}
|
||
while (tail != curr && (tail = prev) != NULL);
|
||
|
||
/* But wait, there's more! Input sections up to stub_group_size
|
||
bytes before the stub section can be handled by it too. */
|
||
if (!stubs_always_before_branch)
|
||
{
|
||
total = 0;
|
||
while (prev != NULL
|
||
&& ((total += tail->output_offset - prev->output_offset)
|
||
< stub_group_size))
|
||
{
|
||
tail = prev;
|
||
prev = PREV_SEC (tail);
|
||
htab->stub_group[tail->id].link_sec = curr;
|
||
}
|
||
}
|
||
tail = prev;
|
||
}
|
||
}
|
||
while (list-- != htab->input_list);
|
||
free (htab->input_list);
|
||
#undef PREV_SEC
|
||
}
|
||
|
||
/* Read in all local syms for all input bfds. */
|
||
|
||
static boolean
|
||
get_local_syms (input_bfd, htab)
|
||
bfd *input_bfd;
|
||
struct ppc_link_hash_table *htab;
|
||
{
|
||
unsigned int bfd_indx;
|
||
Elf_Internal_Sym *local_syms, **all_local_syms;
|
||
|
||
/* 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. */
|
||
bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
|
||
all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt);
|
||
htab->all_local_syms = all_local_syms;
|
||
if (all_local_syms == NULL)
|
||
return false;
|
||
|
||
/* Walk over all the input BFDs, swapping in local symbols.
|
||
If we are creating a shared library, create hash entries for the
|
||
export stubs. */
|
||
for (bfd_indx = 0;
|
||
input_bfd != NULL;
|
||
input_bfd = input_bfd->link_next, bfd_indx++)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Shdr *shndx_hdr;
|
||
Elf_Internal_Sym *isym;
|
||
Elf64_External_Sym *ext_syms, *esym, *end_sy;
|
||
Elf_External_Sym_Shndx *shndx_buf, *shndx;
|
||
bfd_size_type sec_size;
|
||
|
||
/* 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.
|
||
Unfortunately, we're going to have to read & swap them in. */
|
||
sec_size = symtab_hdr->sh_info;
|
||
sec_size *= sizeof (Elf_Internal_Sym);
|
||
local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size);
|
||
if (local_syms == NULL)
|
||
return false;
|
||
|
||
all_local_syms[bfd_indx] = local_syms;
|
||
sec_size = symtab_hdr->sh_info;
|
||
sec_size *= sizeof (Elf64_External_Sym);
|
||
ext_syms = (Elf64_External_Sym *) bfd_malloc (sec_size);
|
||
if (ext_syms == NULL)
|
||
return false;
|
||
|
||
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread ((PTR) ext_syms, sec_size, input_bfd) != sec_size)
|
||
{
|
||
error_ret_free_ext_syms:
|
||
free (ext_syms);
|
||
return false;
|
||
}
|
||
|
||
shndx_buf = NULL;
|
||
shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr;
|
||
if (shndx_hdr->sh_size != 0)
|
||
{
|
||
sec_size = symtab_hdr->sh_info;
|
||
sec_size *= sizeof (Elf_External_Sym_Shndx);
|
||
shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (sec_size);
|
||
if (shndx_buf == NULL)
|
||
goto error_ret_free_ext_syms;
|
||
|
||
if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread ((PTR) shndx_buf, sec_size, input_bfd) != sec_size)
|
||
{
|
||
free (shndx_buf);
|
||
goto error_ret_free_ext_syms;
|
||
}
|
||
}
|
||
|
||
/* Swap the local symbols in. */
|
||
for (esym = ext_syms, end_sy = esym + symtab_hdr->sh_info,
|
||
isym = local_syms, shndx = shndx_buf;
|
||
esym < end_sy;
|
||
esym++, isym++, shndx = (shndx ? shndx + 1 : NULL))
|
||
bfd_elf64_swap_symbol_in (input_bfd, (const PTR) esym,
|
||
(const PTR) shndx, isym);
|
||
|
||
/* Now we can free the external symbols. */
|
||
free (shndx_buf);
|
||
free (ext_syms);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Determine and set the size of the stub section for a final link.
|
||
|
||
The basic idea here is to examine all the relocations looking for
|
||
PC-relative calls to a target that is unreachable with a "bl"
|
||
instruction. */
|
||
|
||
boolean
|
||
ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
|
||
add_stub_section, layout_sections_again)
|
||
bfd *output_bfd;
|
||
bfd *stub_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd_signed_vma group_size;
|
||
asection * (*add_stub_section) PARAMS ((const char *, asection *));
|
||
void (*layout_sections_again) PARAMS ((void));
|
||
{
|
||
bfd_size_type stub_group_size;
|
||
boolean stubs_always_before_branch;
|
||
boolean ret = false;
|
||
struct ppc_link_hash_table *htab = ppc_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;
|
||
stubs_always_before_branch = group_size < 0;
|
||
if (group_size < 0)
|
||
stub_group_size = -group_size;
|
||
else
|
||
stub_group_size = group_size;
|
||
if (stub_group_size == 1)
|
||
{
|
||
/* Default values. */
|
||
stub_group_size = 30720000;
|
||
if (htab->has_14bit_branch)
|
||
stub_group_size = 30000;
|
||
}
|
||
|
||
group_sections (htab, stub_group_size, stubs_always_before_branch);
|
||
|
||
if (! get_local_syms (info->input_bfds, htab))
|
||
{
|
||
if (htab->all_local_syms)
|
||
goto error_ret_free_local;
|
||
return false;
|
||
}
|
||
|
||
while (1)
|
||
{
|
||
bfd *input_bfd;
|
||
unsigned int bfd_indx;
|
||
asection *stub_sec;
|
||
boolean stub_changed;
|
||
|
||
htab->stub_iteration += 1;
|
||
stub_changed = false;
|
||
|
||
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_Shdr *input_rel_hdr;
|
||
Elf64_External_Rela *external_relocs, *erelaend, *erela;
|
||
Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
|
||
bfd_size_type amt;
|
||
|
||
/* 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;
|
||
|
||
/* Allocate space for the external relocations. */
|
||
amt = section->reloc_count;
|
||
amt *= sizeof (Elf64_External_Rela);
|
||
external_relocs = (Elf64_External_Rela *) bfd_malloc (amt);
|
||
if (external_relocs == NULL)
|
||
{
|
||
goto error_ret_free_local;
|
||
}
|
||
|
||
/* Likewise for the internal relocations. */
|
||
amt = section->reloc_count;
|
||
amt *= sizeof (Elf_Internal_Rela);
|
||
internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt);
|
||
if (internal_relocs == NULL)
|
||
{
|
||
free (external_relocs);
|
||
goto error_ret_free_local;
|
||
}
|
||
|
||
/* Read in the external relocs. */
|
||
input_rel_hdr = &elf_section_data (section)->rel_hdr;
|
||
if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread ((PTR) external_relocs,
|
||
input_rel_hdr->sh_size,
|
||
input_bfd) != input_rel_hdr->sh_size)
|
||
{
|
||
free (external_relocs);
|
||
error_ret_free_internal:
|
||
free (internal_relocs);
|
||
goto error_ret_free_local;
|
||
}
|
||
|
||
/* Swap in the relocs. */
|
||
erela = external_relocs;
|
||
erelaend = erela + section->reloc_count;
|
||
irela = internal_relocs;
|
||
for (; erela < erelaend; erela++, irela++)
|
||
bfd_elf64_swap_reloca_in (input_bfd, erela, irela);
|
||
|
||
/* We're done with the external relocs, free them. */
|
||
free (external_relocs);
|
||
|
||
/* Now examine each relocation. */
|
||
irela = internal_relocs;
|
||
irelaend = irela + section->reloc_count;
|
||
for (; irela < irelaend; irela++)
|
||
{
|
||
unsigned int r_type, r_indx;
|
||
enum ppc_stub_type stub_type;
|
||
struct ppc_stub_hash_entry *stub_entry;
|
||
asection *sym_sec;
|
||
bfd_vma sym_value;
|
||
bfd_vma destination;
|
||
struct ppc_link_hash_entry *hash;
|
||
char *stub_name;
|
||
const asection *id_sec;
|
||
|
||
r_type = ELF64_R_TYPE (irela->r_info);
|
||
r_indx = ELF64_R_SYM (irela->r_info);
|
||
|
||
if (r_type >= (unsigned int) R_PPC_max)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_ret_free_internal;
|
||
}
|
||
|
||
/* Only look for stubs on branch instructions. */
|
||
if (r_type != (unsigned int) R_PPC64_REL24
|
||
&& r_type != (unsigned int) R_PPC64_REL14
|
||
&& r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
|
||
&& r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
|
||
continue;
|
||
|
||
/* Now determine the call target, its name, value,
|
||
section. */
|
||
sym_sec = NULL;
|
||
sym_value = 0;
|
||
destination = 0;
|
||
hash = NULL;
|
||
if (r_indx < symtab_hdr->sh_info)
|
||
{
|
||
/* It's a local symbol. */
|
||
Elf_Internal_Sym *sym;
|
||
Elf_Internal_Shdr *hdr;
|
||
|
||
sym = local_syms + r_indx;
|
||
hdr = elf_elfsections (input_bfd)[sym->st_shndx];
|
||
sym_sec = hdr->bfd_section;
|
||
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
||
sym_value = sym->st_value;
|
||
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;
|
||
hash = ((struct ppc_link_hash_entry *)
|
||
elf_sym_hashes (input_bfd)[e_indx]);
|
||
|
||
while (hash->elf.root.type == bfd_link_hash_indirect
|
||
|| hash->elf.root.type == bfd_link_hash_warning)
|
||
hash = ((struct ppc_link_hash_entry *)
|
||
hash->elf.root.u.i.link);
|
||
|
||
if (hash->elf.root.type == bfd_link_hash_defined
|
||
|| hash->elf.root.type == bfd_link_hash_defweak)
|
||
{
|
||
sym_sec = hash->elf.root.u.def.section;
|
||
sym_value = hash->elf.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 if (hash->elf.root.type == bfd_link_hash_undefweak)
|
||
;
|
||
else if (hash->elf.root.type == bfd_link_hash_undefined)
|
||
;
|
||
else
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_ret_free_internal;
|
||
}
|
||
}
|
||
|
||
/* Determine what (if any) linker stub is needed. */
|
||
stub_type = ppc_type_of_stub (section, irela, &hash,
|
||
destination);
|
||
if (stub_type == ppc_stub_none)
|
||
continue;
|
||
|
||
/* Support for grouping stub sections. */
|
||
id_sec = htab->stub_group[section->id].link_sec;
|
||
|
||
/* Get the name of this stub. */
|
||
stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
|
||
if (!stub_name)
|
||
goto error_ret_free_internal;
|
||
|
||
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
|
||
stub_name, false, false);
|
||
if (stub_entry != NULL)
|
||
{
|
||
/* The proper stub has already been created. */
|
||
free (stub_name);
|
||
continue;
|
||
}
|
||
|
||
stub_entry = ppc_add_stub (stub_name, section, htab);
|
||
if (stub_entry == NULL)
|
||
{
|
||
free (stub_name);
|
||
goto error_ret_free_local;
|
||
}
|
||
|
||
stub_entry->target_value = sym_value;
|
||
stub_entry->target_section = sym_sec;
|
||
stub_entry->stub_type = stub_type;
|
||
stub_entry->h = hash;
|
||
stub_changed = true;
|
||
}
|
||
|
||
/* We're done with the internal relocs, free them. */
|
||
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->_raw_size = 0;
|
||
stub_sec->_cooked_size = 0;
|
||
}
|
||
htab->sbrlt->_raw_size = 0;
|
||
htab->sbrlt->_cooked_size = 0;
|
||
|
||
bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
|
||
|
||
/* Ask the linker to do its stuff. */
|
||
(*htab->layout_sections_again) ();
|
||
}
|
||
|
||
/* It would be nice to strip .branch_lt from the output if the
|
||
section is empty, but it's too late. If we strip sections here,
|
||
the dynamic symbol table is corrupted since the section symbol
|
||
for the stripped section isn't written. */
|
||
|
||
ret = true;
|
||
|
||
error_ret_free_local:
|
||
while (htab->bfd_count-- > 0)
|
||
if (htab->all_local_syms[htab->bfd_count])
|
||
free (htab->all_local_syms[htab->bfd_count]);
|
||
free (htab->all_local_syms);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Called after we have determined section placement. If sections
|
||
move, we'll be called again. Provide a value for TOCstart. */
|
||
|
||
bfd_vma
|
||
ppc64_elf_toc (obfd)
|
||
bfd *obfd;
|
||
{
|
||
asection *s;
|
||
bfd_vma TOCstart;
|
||
|
||
/* The TOC consists of sections .got, .toc, .tocbss, .plt in that
|
||
order. The TOC starts where the first of these sections starts. */
|
||
s = bfd_get_section_by_name (obfd, ".got");
|
||
if (s == NULL)
|
||
s = bfd_get_section_by_name (obfd, ".toc");
|
||
if (s == NULL)
|
||
s = bfd_get_section_by_name (obfd, ".tocbss");
|
||
if (s == NULL)
|
||
s = bfd_get_section_by_name (obfd, ".plt");
|
||
if (s == NULL)
|
||
{
|
||
/* This may happen for
|
||
o references to TOC base (SYM@toc / TOC[tc0]) without a
|
||
.toc directive
|
||
o bad linker script
|
||
o --gc-sections and empty TOC sections
|
||
|
||
FIXME: Warn user? */
|
||
|
||
/* Look for a likely section. We probably won't even be
|
||
using TOCstart. */
|
||
for (s = obfd->sections; s != NULL; s = s->next)
|
||
if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
|
||
== (SEC_ALLOC | SEC_SMALL_DATA))
|
||
break;
|
||
if (s == NULL)
|
||
for (s = obfd->sections; s != NULL; s = s->next)
|
||
if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
|
||
== (SEC_ALLOC | SEC_SMALL_DATA))
|
||
break;
|
||
if (s == NULL)
|
||
for (s = obfd->sections; s != NULL; s = s->next)
|
||
if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
|
||
break;
|
||
if (s == NULL)
|
||
for (s = obfd->sections; s != NULL; s = s->next)
|
||
if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
|
||
break;
|
||
}
|
||
|
||
TOCstart = 0;
|
||
if (s != NULL)
|
||
TOCstart = s->output_section->vma + s->output_offset;
|
||
|
||
return TOCstart;
|
||
}
|
||
|
||
/* 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 gldelf64ppc_finish. */
|
||
|
||
boolean
|
||
ppc64_elf_build_stubs (info)
|
||
struct bfd_link_info *info;
|
||
{
|
||
struct ppc_link_hash_table *htab = ppc_hash_table (info);
|
||
asection *stub_sec;
|
||
bfd_vma plt_r2;
|
||
bfd_byte *p;
|
||
|
||
for (stub_sec = htab->stub_bfd->sections;
|
||
stub_sec != NULL;
|
||
stub_sec = stub_sec->next)
|
||
{
|
||
bfd_size_type size;
|
||
|
||
/* Allocate memory to hold the linker stubs. */
|
||
size = stub_sec->_raw_size;
|
||
if (size != 0)
|
||
{
|
||
stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
|
||
if (stub_sec->contents == NULL)
|
||
return false;
|
||
}
|
||
stub_sec->_cooked_size = 0;
|
||
}
|
||
|
||
if (htab->splt != NULL)
|
||
{
|
||
/* Build the .glink plt call stub. */
|
||
plt_r2 = (htab->splt->output_offset
|
||
+ htab->splt->output_section->vma
|
||
- elf_gp (htab->splt->output_section->owner)
|
||
- TOC_BASE_OFF);
|
||
p = htab->sglink->contents;
|
||
p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
|
||
while (p - htab->sglink->contents < GLINK_CALL_STUB_SIZE)
|
||
{
|
||
bfd_put_32 (htab->sglink->owner, NOP, p);
|
||
p += 4;
|
||
}
|
||
htab->sglink->_cooked_size = p - htab->sglink->contents;
|
||
|
||
/* Use reloc_count to count entries. */
|
||
htab->sglink->reloc_count = 0;
|
||
}
|
||
|
||
if (htab->sbrlt->_raw_size != 0)
|
||
{
|
||
htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
|
||
htab->sbrlt->_raw_size);
|
||
if (htab->sbrlt->contents == NULL)
|
||
return false;
|
||
}
|
||
|
||
/* Build the stubs as directed by the stub hash table. */
|
||
bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
|
||
htab->sglink->reloc_count = 0;
|
||
|
||
for (stub_sec = htab->stub_bfd->sections;
|
||
stub_sec != NULL;
|
||
stub_sec = stub_sec->next)
|
||
{
|
||
if (stub_sec->_raw_size != stub_sec->_cooked_size)
|
||
break;
|
||
}
|
||
|
||
if (stub_sec != NULL
|
||
|| htab->sglink->_raw_size != htab->sglink->_cooked_size)
|
||
{
|
||
htab->stub_error = true;
|
||
(*_bfd_error_handler) (_("stubs don't match calculated size"));
|
||
}
|
||
|
||
return !htab->stub_error;
|
||
}
|
||
|
||
/* Set up any other section flags and such that may be necessary. */
|
||
|
||
static boolean
|
||
ppc64_elf_fake_sections (abfd, shdr, asect)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
Elf64_Internal_Shdr *shdr;
|
||
asection *asect;
|
||
{
|
||
if ((asect->flags & SEC_EXCLUDE) != 0)
|
||
shdr->sh_flags |= SHF_EXCLUDE;
|
||
|
||
if ((asect->flags & SEC_SORT_ENTRIES) != 0)
|
||
shdr->sh_type = SHT_ORDERED;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* The RELOCATE_SECTION function is called by the ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjust the section contents as
|
||
necessary, and (if using Rela relocs and generating a
|
||
relocateable output file) adjusting the reloc addend as
|
||
necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocateable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static boolean
|
||
ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *relocs;
|
||
Elf_Internal_Sym *local_syms;
|
||
asection **local_sections;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
bfd_vma *local_got_offsets;
|
||
bfd_vma TOCstart;
|
||
boolean ret = true;
|
||
boolean is_opd;
|
||
/* Disabled until we sort out how ld should choose 'y' vs 'at'. */
|
||
boolean is_power4 = false;
|
||
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
/* Initialize howto table if needed. */
|
||
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
|
||
ppc_howto_init ();
|
||
|
||
htab = ppc_hash_table (info);
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
TOCstart = elf_gp (output_bfd);
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
is_opd = strcmp (bfd_get_section_name (abfd, input_section), ".opd") == 0;
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
enum elf_ppc_reloc_type r_type;
|
||
bfd_vma offset;
|
||
bfd_vma addend;
|
||
bfd_reloc_status_type r;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
struct elf_link_hash_entry *h;
|
||
struct elf_link_hash_entry *fdh;
|
||
const char *sym_name;
|
||
unsigned long r_symndx;
|
||
bfd_vma relocation;
|
||
boolean unresolved_reloc;
|
||
boolean warned;
|
||
long insn;
|
||
struct ppc_stub_hash_entry *stub_entry;
|
||
bfd_vma max_br_offset;
|
||
bfd_vma from;
|
||
|
||
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
||
r_symndx = ELF64_R_SYM (rel->r_info);
|
||
offset = rel->r_offset;
|
||
addend = rel->r_addend;
|
||
r = bfd_reloc_other;
|
||
sym = (Elf_Internal_Sym *) 0;
|
||
sec = (asection *) 0;
|
||
h = (struct elf_link_hash_entry *) 0;
|
||
sym_name = (const char *) 0;
|
||
unresolved_reloc = false;
|
||
warned = false;
|
||
|
||
if (r_type == R_PPC64_TOC)
|
||
{
|
||
/* Relocation value is TOC base. Symbol is ignored. */
|
||
relocation = TOCstart + TOC_BASE_OFF;
|
||
}
|
||
else if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
/* It's a local symbol. */
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
sym_name = "<local symbol>";
|
||
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
|
||
/* rel may have changed, update our copy of addend. */
|
||
addend = rel->r_addend;
|
||
}
|
||
else
|
||
{
|
||
/* It's a global symbol. */
|
||
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;
|
||
sym_name = h->root.root.string;
|
||
relocation = 0;
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
if (sec->output_section == NULL)
|
||
/* Set a flag that will be cleared later if we find a
|
||
relocation value for this symbol. output_section
|
||
is typically NULL for symbols satisfied by a shared
|
||
library. */
|
||
unresolved_reloc = true;
|
||
else
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if (h->root.type == bfd_link_hash_undefweak)
|
||
;
|
||
else if (info->shared
|
||
&& (!info->symbolic || info->allow_shlib_undefined)
|
||
&& !info->no_undefined
|
||
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
||
;
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd, input_section,
|
||
offset, (!info->shared
|
||
|| info->no_undefined
|
||
|| ELF_ST_VISIBILITY (h->other)))))
|
||
return false;
|
||
warned = true;
|
||
}
|
||
}
|
||
|
||
/* First handle relocations that tweak non-addend part of insn. */
|
||
insn = 0;
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
/* Branch taken prediction relocations. */
|
||
case R_PPC64_ADDR14_BRTAKEN:
|
||
case R_PPC64_REL14_BRTAKEN:
|
||
insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
|
||
/* Fall thru. */
|
||
|
||
/* Branch not taken prediction relocations. */
|
||
case R_PPC64_ADDR14_BRNTAKEN:
|
||
case R_PPC64_REL14_BRNTAKEN:
|
||
insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21);
|
||
if (is_power4)
|
||
{
|
||
/* Set 'a' bit. This is 0b00010 in BO field for branch
|
||
on CR(BI) insns (BO == 001at or 011at), and 0b01000
|
||
for branch on CTR insns (BO == 1a00t or 1a01t). */
|
||
if ((insn & (0x14 << 21)) == (0x04 << 21))
|
||
insn |= 0x02 << 21;
|
||
else if ((insn & (0x14 << 21)) == (0x10 << 21))
|
||
insn |= 0x08 << 21;
|
||
else
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
from = (offset
|
||
+ input_section->output_offset
|
||
+ input_section->output_section->vma);
|
||
|
||
/* Invert 'y' bit if not the default. */
|
||
if ((bfd_signed_vma) (relocation + addend - from) < 0)
|
||
insn ^= 0x01 << 21;
|
||
}
|
||
|
||
bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
|
||
break;
|
||
|
||
case R_PPC64_REL24:
|
||
/* A REL24 branching to a linkage function is followed by a
|
||
nop. We replace the nop with a ld in order to restore
|
||
the TOC base pointer. Only calls to shared objects need
|
||
to alter the TOC base. These are recognized by their
|
||
need for a PLT entry. */
|
||
if (h != NULL
|
||
&& (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
|
||
&& fdh->plt.offset != (bfd_vma) -1
|
||
&& (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
|
||
rel, htab)) != NULL)
|
||
{
|
||
boolean can_plt_call = 0;
|
||
|
||
if (offset + 8 <= input_section->_cooked_size)
|
||
{
|
||
insn = bfd_get_32 (input_bfd, contents + offset + 4);
|
||
if (insn == NOP
|
||
|| insn == CROR_151515 || insn == CROR_313131)
|
||
{
|
||
bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
|
||
contents + offset + 4);
|
||
can_plt_call = 1;
|
||
}
|
||
}
|
||
|
||
if (!can_plt_call)
|
||
{
|
||
/* If this is a plain branch rather than a branch
|
||
and link, don't require a nop. */
|
||
insn = bfd_get_32 (input_bfd, contents + offset);
|
||
if ((insn & 1) == 0)
|
||
can_plt_call = 1;
|
||
}
|
||
|
||
if (can_plt_call)
|
||
{
|
||
relocation = (stub_entry->stub_offset
|
||
+ stub_entry->stub_sec->output_offset
|
||
+ stub_entry->stub_sec->output_section->vma);
|
||
addend = 0;
|
||
unresolved_reloc = false;
|
||
}
|
||
}
|
||
|
||
if (h != NULL
|
||
&& h->root.type == bfd_link_hash_undefweak
|
||
&& relocation == 0
|
||
&& addend == 0)
|
||
{
|
||
/* Tweak calls to undefined weak functions to point at a
|
||
blr. We can thus call a weak function without first
|
||
checking whether the function is defined. We have a
|
||
blr at the end of .sfpr. */
|
||
BFD_ASSERT (htab->sfpr->_raw_size != 0);
|
||
relocation = (htab->sfpr->_raw_size - 4
|
||
+ htab->sfpr->output_offset
|
||
+ htab->sfpr->output_section->vma);
|
||
from = (offset
|
||
+ input_section->output_offset
|
||
+ input_section->output_section->vma);
|
||
|
||
/* But let's not be silly about it. If the blr isn't in
|
||
reach, just go to the next instruction. */
|
||
if (relocation - from + (1 << 25) >= (1 << 26)
|
||
|| htab->sfpr->_raw_size == 0)
|
||
relocation = from + 4;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/* Set `addend'. */
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
(*_bfd_error_handler)
|
||
(_("%s: unknown relocation type %d for symbol %s"),
|
||
bfd_archive_filename (input_bfd), (int) r_type, sym_name);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
|
||
case R_PPC64_NONE:
|
||
case R_PPC_GNU_VTINHERIT:
|
||
case R_PPC_GNU_VTENTRY:
|
||
continue;
|
||
|
||
/* GOT16 relocations. Like an ADDR16 using the symbol's
|
||
address in the GOT as relocation value instead of the
|
||
symbols value itself. Also, create a GOT entry for the
|
||
symbol and put the symbol value there. */
|
||
case R_PPC64_GOT16:
|
||
case R_PPC64_GOT16_LO:
|
||
case R_PPC64_GOT16_HI:
|
||
case R_PPC64_GOT16_HA:
|
||
case R_PPC64_GOT16_DS:
|
||
case R_PPC64_GOT16_LO_DS:
|
||
{
|
||
/* Relocation is to the entry for this symbol in the global
|
||
offset table. */
|
||
bfd_vma off;
|
||
|
||
if (htab->sgot == NULL)
|
||
abort ();
|
||
|
||
if (h != NULL)
|
||
{
|
||
boolean dyn;
|
||
|
||
off = h->got.offset;
|
||
dyn = htab->elf.dynamic_sections_created;
|
||
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
|
||
|| (info->shared
|
||
&& (info->symbolic
|
||
|| h->dynindx == -1
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_FORCED_LOCAL))
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR)))
|
||
{
|
||
/* This is actually a static link, or it is a
|
||
-Bsymbolic link and the symbol is defined
|
||
locally, or the symbol was forced to be local
|
||
because of a version file. We must initialize
|
||
this entry in the global offset table. Since the
|
||
offset must always be a multiple of 8, we use the
|
||
least significant bit to record whether we have
|
||
initialized it already.
|
||
|
||
When doing a dynamic link, we create a .rel.got
|
||
relocation entry to initialize the value. This
|
||
is done in the finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_64 (output_bfd, relocation,
|
||
htab->sgot->contents + off);
|
||
h->got.offset |= 1;
|
||
}
|
||
}
|
||
else
|
||
unresolved_reloc = false;
|
||
}
|
||
else
|
||
{
|
||
if (local_got_offsets == NULL)
|
||
abort ();
|
||
|
||
off = local_got_offsets[r_symndx];
|
||
|
||
/* The offset must always be a multiple of 8. We use
|
||
the least significant bit to record whether we have
|
||
already processed this entry. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_64 (output_bfd, relocation,
|
||
htab->sgot->contents + off);
|
||
|
||
if (info->shared)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
Elf64_External_Rela *loc;
|
||
|
||
/* We need to generate a R_PPC64_RELATIVE reloc
|
||
for the dynamic linker. */
|
||
outrel.r_offset = (htab->sgot->output_section->vma
|
||
+ htab->sgot->output_offset
|
||
+ off);
|
||
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
|
||
outrel.r_addend = relocation;
|
||
loc = (Elf64_External_Rela *) htab->srelgot->contents;
|
||
loc += htab->srelgot->reloc_count++;
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
}
|
||
|
||
if (off >= (bfd_vma) -2)
|
||
abort ();
|
||
|
||
relocation = htab->sgot->output_offset + off;
|
||
|
||
/* TOC base (r2) is TOC start plus 0x8000. */
|
||
addend -= TOC_BASE_OFF;
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_PLT16_HA:
|
||
case R_PPC64_PLT16_HI:
|
||
case R_PPC64_PLT16_LO:
|
||
case R_PPC64_PLT32:
|
||
case R_PPC64_PLT64:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table. */
|
||
|
||
/* Resolve a PLT reloc against a local symbol directly,
|
||
without using the procedure linkage table. */
|
||
if (h == NULL)
|
||
break;
|
||
|
||
if (h->plt.offset == (bfd_vma) -1
|
||
|| htab->splt == NULL)
|
||
{
|
||
/* We didn't make a PLT entry for this symbol. This
|
||
happens when statically linking PIC code, or when
|
||
using -Bsymbolic. */
|
||
break;
|
||
}
|
||
|
||
relocation = (htab->splt->output_section->vma
|
||
+ htab->splt->output_offset
|
||
+ h->plt.offset);
|
||
unresolved_reloc = false;
|
||
break;
|
||
|
||
/* TOC16 relocs. We want the offset relative to the TOC base,
|
||
which is the address of the start of the TOC plus 0x8000.
|
||
The TOC consists of sections .got, .toc, .tocbss, and .plt,
|
||
in this order. */
|
||
case R_PPC64_TOC16:
|
||
case R_PPC64_TOC16_LO:
|
||
case R_PPC64_TOC16_HI:
|
||
case R_PPC64_TOC16_DS:
|
||
case R_PPC64_TOC16_LO_DS:
|
||
case R_PPC64_TOC16_HA:
|
||
addend -= TOCstart + TOC_BASE_OFF;
|
||
break;
|
||
|
||
/* Relocate against the beginning of the section. */
|
||
case R_PPC64_SECTOFF:
|
||
case R_PPC64_SECTOFF_LO:
|
||
case R_PPC64_SECTOFF_HI:
|
||
case R_PPC64_SECTOFF_DS:
|
||
case R_PPC64_SECTOFF_LO_DS:
|
||
case R_PPC64_SECTOFF_HA:
|
||
if (sec != (asection *) 0)
|
||
addend -= sec->output_section->vma;
|
||
break;
|
||
|
||
case R_PPC64_REL14:
|
||
case R_PPC64_REL14_BRNTAKEN:
|
||
case R_PPC64_REL14_BRTAKEN:
|
||
case R_PPC64_REL24:
|
||
break;
|
||
|
||
/* Relocations that may need to be propagated if this is a
|
||
dynamic object. */
|
||
case R_PPC64_REL32:
|
||
case R_PPC64_REL64:
|
||
case R_PPC64_ADDR14:
|
||
case R_PPC64_ADDR14_BRNTAKEN:
|
||
case R_PPC64_ADDR14_BRTAKEN:
|
||
case R_PPC64_ADDR16:
|
||
case R_PPC64_ADDR16_DS:
|
||
case R_PPC64_ADDR16_HA:
|
||
case R_PPC64_ADDR16_HI:
|
||
case R_PPC64_ADDR16_HIGHER:
|
||
case R_PPC64_ADDR16_HIGHERA:
|
||
case R_PPC64_ADDR16_HIGHEST:
|
||
case R_PPC64_ADDR16_HIGHESTA:
|
||
case R_PPC64_ADDR16_LO:
|
||
case R_PPC64_ADDR16_LO_DS:
|
||
case R_PPC64_ADDR24:
|
||
case R_PPC64_ADDR30:
|
||
case R_PPC64_ADDR32:
|
||
case R_PPC64_ADDR64:
|
||
case R_PPC64_UADDR16:
|
||
case R_PPC64_UADDR32:
|
||
case R_PPC64_UADDR64:
|
||
/* r_symndx will be zero only for relocs against symbols
|
||
from removed linkonce sections, or sections discarded by
|
||
a linker script. */
|
||
if (r_symndx == 0)
|
||
break;
|
||
/* Fall thru. */
|
||
|
||
case R_PPC64_TOC:
|
||
if ((input_section->flags & SEC_ALLOC) == 0)
|
||
break;
|
||
|
||
if (NO_OPD_RELOCS && is_opd)
|
||
break;
|
||
|
||
if ((info->shared
|
||
&& (IS_ABSOLUTE_RELOC (r_type)
|
||
|| (h != NULL
|
||
&& h->dynindx != -1
|
||
&& (! info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
||
|| (!info->shared
|
||
&& h != NULL
|
||
&& h->dynindx != -1
|
||
&& (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
|
||
&& (((h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
|| h->root.type == bfd_link_hash_undefweak
|
||
|| h->root.type == bfd_link_hash_undefined)))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
boolean skip, relocate;
|
||
asection *sreloc;
|
||
Elf64_External_Rela *loc;
|
||
|
||
/* When generating a dynamic 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);
|
||
outrel.r_addend = addend;
|
||
|
||
if (skip)
|
||
memset (&outrel, 0, sizeof outrel);
|
||
else if (h != NULL
|
||
&& h->dynindx != -1
|
||
&& !is_opd
|
||
&& (!IS_ABSOLUTE_RELOC (r_type)
|
||
|| !info->shared
|
||
|| !info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||
outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
|
||
else
|
||
{
|
||
/* This symbol is local, or marked to become local,
|
||
or this is an opd section reloc which must point
|
||
at a local function. */
|
||
outrel.r_addend += relocation;
|
||
relocate = true;
|
||
if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
|
||
{
|
||
if (is_opd && h != NULL)
|
||
{
|
||
/* Lie about opd entries. This case occurs
|
||
when building shared libraries and we
|
||
reference a function in another shared
|
||
lib. The same thing happens for a weak
|
||
definition in an application that's
|
||
overridden by a strong definition in a
|
||
shared lib. (I believe this is a generic
|
||
bug in binutils handling of weak syms.)
|
||
In these cases we won't use the opd
|
||
entry in this lib; We ought to edit the
|
||
opd section to remove unused entries. */
|
||
unresolved_reloc = false;
|
||
}
|
||
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
|
||
}
|
||
else
|
||
{
|
||
long indx = 0;
|
||
|
||
if (bfd_is_abs_section (sec))
|
||
;
|
||
else if (sec == NULL || sec->owner == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
else
|
||
{
|
||
asection *osec;
|
||
|
||
osec = sec->output_section;
|
||
indx = elf_section_data (osec)->dynindx;
|
||
|
||
/* We are turning this relocation into one
|
||
against a section symbol, so subtract out
|
||
the output section's address but not the
|
||
offset of the input section in the output
|
||
section. */
|
||
outrel.r_addend -= osec->vma;
|
||
}
|
||
|
||
outrel.r_info = ELF64_R_INFO (indx, r_type);
|
||
}
|
||
}
|
||
|
||
sreloc = elf_section_data (input_section)->sreloc;
|
||
if (sreloc == NULL)
|
||
abort ();
|
||
|
||
loc = (Elf64_External_Rela *) sreloc->contents;
|
||
loc += sreloc->reloc_count++;
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
|
||
/* If this reloc is against an external symbol, it will
|
||
be computed at runtime, so there's no need to do
|
||
anything now. */
|
||
if (! relocate)
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_COPY:
|
||
case R_PPC64_GLOB_DAT:
|
||
case R_PPC64_JMP_SLOT:
|
||
case R_PPC64_RELATIVE:
|
||
/* We shouldn't ever see these dynamic relocs in relocatable
|
||
files. */
|
||
/* Fall thru */
|
||
|
||
case R_PPC64_PLTGOT16:
|
||
case R_PPC64_PLTGOT16_DS:
|
||
case R_PPC64_PLTGOT16_HA:
|
||
case R_PPC64_PLTGOT16_HI:
|
||
case R_PPC64_PLTGOT16_LO:
|
||
case R_PPC64_PLTGOT16_LO_DS:
|
||
case R_PPC64_PLTREL32:
|
||
case R_PPC64_PLTREL64:
|
||
/* These ones haven't been implemented yet. */
|
||
|
||
(*_bfd_error_handler)
|
||
(_("%s: Relocation %s is not supported for symbol %s."),
|
||
bfd_archive_filename (input_bfd),
|
||
ppc64_elf_howto_table[(int) r_type]->name, sym_name);
|
||
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
/* Do any further special processing. */
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case R_PPC64_ADDR16_HA:
|
||
case R_PPC64_ADDR16_HIGHERA:
|
||
case R_PPC64_ADDR16_HIGHESTA:
|
||
case R_PPC64_PLT16_HA:
|
||
case R_PPC64_TOC16_HA:
|
||
case R_PPC64_SECTOFF_HA:
|
||
/* It's just possible that this symbol is a weak symbol
|
||
that's not actually defined anywhere. In that case,
|
||
'sec' would be NULL, and we should leave the symbol
|
||
alone (it will be set to zero elsewhere in the link). */
|
||
if (sec != NULL)
|
||
/* Add 0x10000 if sign bit in 0:15 is set. */
|
||
addend += ((relocation + addend) & 0x8000) << 1;
|
||
break;
|
||
|
||
case R_PPC64_ADDR16_DS:
|
||
case R_PPC64_ADDR16_LO_DS:
|
||
case R_PPC64_GOT16_DS:
|
||
case R_PPC64_GOT16_LO_DS:
|
||
case R_PPC64_PLT16_LO_DS:
|
||
case R_PPC64_SECTOFF_DS:
|
||
case R_PPC64_SECTOFF_LO_DS:
|
||
case R_PPC64_TOC16_DS:
|
||
case R_PPC64_TOC16_LO_DS:
|
||
case R_PPC64_PLTGOT16_DS:
|
||
case R_PPC64_PLTGOT16_LO_DS:
|
||
if (((relocation + addend) & 3) != 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: error: relocation %s not a multiple of 4"),
|
||
bfd_archive_filename (input_bfd),
|
||
ppc64_elf_howto_table[(int) r_type]->name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
case R_PPC64_REL14:
|
||
case R_PPC64_REL14_BRNTAKEN:
|
||
case R_PPC64_REL14_BRTAKEN:
|
||
max_br_offset = 1 << 15;
|
||
goto branch_check;
|
||
|
||
case R_PPC64_REL24:
|
||
max_br_offset = 1 << 25;
|
||
|
||
branch_check:
|
||
/* If the branch is out of reach, then redirect the
|
||
call to the local stub for this function. */
|
||
from = (offset
|
||
+ input_section->output_offset
|
||
+ input_section->output_section->vma);
|
||
if (relocation + addend - from + max_br_offset >= 2 * max_br_offset
|
||
&& (stub_entry = ppc_get_stub_entry (input_section, sec, h,
|
||
rel, htab)) != NULL)
|
||
{
|
||
/* Munge up the value and addend so that we call the stub
|
||
rather than the procedure directly. */
|
||
relocation = (stub_entry->stub_offset
|
||
+ stub_entry->stub_sec->output_offset
|
||
+ stub_entry->stub_sec->output_section->vma);
|
||
addend = 0;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/* FIXME: Why do we allow debugging sections to escape this error?
|
||
More importantly, why do we not emit dynamic relocs above in
|
||
debugging sections (which are ! SEC_ALLOC)? If we had
|
||
emitted the dynamic reloc, we could remove the fudge here. */
|
||
if (unresolved_reloc
|
||
&& !(info->shared
|
||
&& (input_section->flags & SEC_DEBUGGING) != 0
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
|
||
bfd_archive_filename (input_bfd),
|
||
bfd_get_section_name (input_bfd, input_section),
|
||
(long) rel->r_offset,
|
||
h->root.root.string);
|
||
ret = false;
|
||
}
|
||
|
||
r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
|
||
input_bfd,
|
||
input_section,
|
||
contents,
|
||
offset,
|
||
relocation,
|
||
addend);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
{
|
||
if (h->root.type == bfd_link_hash_undefweak
|
||
&& ppc64_elf_howto_table[(int) r_type]->pc_relative)
|
||
{
|
||
/* Assume this is a call protected by other code that
|
||
detects the symbol is undefined. If this is the case,
|
||
we can safely ignore the overflow. If not, the
|
||
program is hosed anyway, and a little warning isn't
|
||
going to help. */
|
||
|
||
continue;
|
||
}
|
||
|
||
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)
|
||
continue;
|
||
if (*name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
if (r == bfd_reloc_overflow)
|
||
{
|
||
if (warned)
|
||
continue;
|
||
if (!((*info->callbacks->reloc_overflow)
|
||
(info, name, ppc64_elf_howto_table[(int) r_type]->name,
|
||
rel->r_addend, input_bfd, input_section, offset)))
|
||
return false;
|
||
}
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s(%s+0x%lx): reloc against `%s': error %d"),
|
||
bfd_archive_filename (input_bfd),
|
||
bfd_get_section_name (input_bfd, input_section),
|
||
(long) rel->r_offset, name, (int) r);
|
||
ret = false;
|
||
}
|
||
}
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static boolean
|
||
ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
bfd *dynobj;
|
||
|
||
htab = ppc_hash_table (info);
|
||
dynobj = htab->elf.dynobj;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1
|
||
&& ((struct ppc_link_hash_entry *) h)->is_func_descriptor)
|
||
{
|
||
Elf_Internal_Rela rela;
|
||
Elf64_External_Rela *loc;
|
||
|
||
/* This symbol has an entry in the procedure linkage table. Set
|
||
it up. */
|
||
|
||
if (htab->splt == NULL
|
||
|| htab->srelplt == NULL
|
||
|| htab->sglink == NULL)
|
||
abort ();
|
||
|
||
/* Create a JMP_SLOT reloc to inform the dynamic linker to
|
||
fill in the PLT entry. */
|
||
|
||
rela.r_offset = (htab->splt->output_section->vma
|
||
+ htab->splt->output_offset
|
||
+ h->plt.offset);
|
||
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
|
||
rela.r_addend = 0;
|
||
|
||
loc = (Elf64_External_Rela *) htab->srelplt->contents;
|
||
loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
|
||
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
if (h->got.offset != (bfd_vma) -1)
|
||
{
|
||
Elf_Internal_Rela rela;
|
||
Elf64_External_Rela *loc;
|
||
|
||
/* This symbol has an entry in the global offset table. Set it
|
||
up. */
|
||
|
||
if (htab->sgot == NULL || htab->srelgot == NULL)
|
||
abort ();
|
||
|
||
rela.r_offset = (htab->sgot->output_section->vma
|
||
+ htab->sgot->output_offset
|
||
+ (h->got.offset &~ (bfd_vma) 1));
|
||
|
||
/* If this is a static link, or it is a -Bsymbolic link and the
|
||
symbol is defined locally or was forced to be local because
|
||
of a version file, we just want to emit a RELATIVE reloc.
|
||
The entry in the global offset table will already have been
|
||
initialized in the relocate_section function. */
|
||
if (info->shared
|
||
&& (info->symbolic
|
||
|| h->dynindx == -1
|
||
|| (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
|
||
{
|
||
BFD_ASSERT((h->got.offset & 1) != 0);
|
||
rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
|
||
rela.r_addend = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT ((h->got.offset & 1) == 0);
|
||
bfd_put_64 (output_bfd, (bfd_vma) 0,
|
||
htab->sgot->contents + h->got.offset);
|
||
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
|
||
rela.r_addend = 0;
|
||
}
|
||
|
||
loc = (Elf64_External_Rela *) htab->srelgot->contents;
|
||
loc += htab->srelgot->reloc_count++;
|
||
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
|
||
{
|
||
Elf_Internal_Rela rela;
|
||
Elf64_External_Rela *loc;
|
||
|
||
/* This symbol needs a copy reloc. Set it up. */
|
||
|
||
if (h->dynindx == -1
|
||
|| (h->root.type != bfd_link_hash_defined
|
||
&& h->root.type != bfd_link_hash_defweak)
|
||
|| htab->srelbss == NULL)
|
||
abort ();
|
||
|
||
rela.r_offset = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
|
||
rela.r_addend = 0;
|
||
loc = (Elf64_External_Rela *) htab->srelbss->contents;
|
||
loc += htab->srelbss->reloc_count++;
|
||
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
/* Mark some specially defined symbols as absolute. */
|
||
if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
|
||
sym->st_shndx = SHN_ABS;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Used to decide how to sort relocs in an optimal manner for the
|
||
dynamic linker, before writing them out. */
|
||
|
||
static enum elf_reloc_type_class
|
||
ppc64_elf_reloc_type_class (rela)
|
||
const Elf_Internal_Rela *rela;
|
||
{
|
||
enum elf_ppc_reloc_type r_type;
|
||
|
||
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
|
||
switch (r_type)
|
||
{
|
||
case R_PPC64_RELATIVE:
|
||
return reloc_class_relative;
|
||
case R_PPC64_JMP_SLOT:
|
||
return reloc_class_plt;
|
||
case R_PPC64_COPY:
|
||
return reloc_class_copy;
|
||
default:
|
||
return reloc_class_normal;
|
||
}
|
||
}
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static boolean
|
||
ppc64_elf_finish_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
struct ppc_link_hash_table *htab;
|
||
bfd *dynobj;
|
||
asection *sdyn;
|
||
|
||
htab = ppc_hash_table (info);
|
||
dynobj = htab->elf.dynobj;
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
if (htab->elf.dynamic_sections_created)
|
||
{
|
||
Elf64_External_Dyn *dyncon, *dynconend;
|
||
|
||
if (sdyn == NULL || htab->sgot == NULL)
|
||
abort ();
|
||
|
||
dyncon = (Elf64_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
asection *s;
|
||
|
||
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
default:
|
||
continue;
|
||
|
||
case DT_PPC64_GLINK:
|
||
dyn.d_un.d_ptr = (htab->sglink->output_section->vma
|
||
+ htab->sglink->output_offset);
|
||
break;
|
||
|
||
case DT_PPC64_OPD:
|
||
s = bfd_get_section_by_name (output_bfd, ".opd");
|
||
if (s != NULL)
|
||
dyn.d_un.d_ptr = s->vma;
|
||
break;
|
||
|
||
case DT_PPC64_OPDSZ:
|
||
s = bfd_get_section_by_name (output_bfd, ".opd");
|
||
if (s != NULL)
|
||
dyn.d_un.d_val = s->_raw_size;
|
||
break;
|
||
|
||
case DT_PLTGOT:
|
||
dyn.d_un.d_ptr = (htab->splt->output_section->vma
|
||
+ htab->splt->output_offset);
|
||
break;
|
||
|
||
case DT_JMPREL:
|
||
dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
|
||
+ htab->srelplt->output_offset);
|
||
break;
|
||
|
||
case DT_PLTRELSZ:
|
||
dyn.d_un.d_val = htab->srelplt->_raw_size;
|
||
break;
|
||
|
||
case DT_RELASZ:
|
||
/* Don't count procedure linkage table relocs in the
|
||
overall reloc count. */
|
||
if (htab->srelplt != NULL)
|
||
dyn.d_un.d_val -= htab->srelplt->_raw_size;
|
||
break;
|
||
}
|
||
|
||
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
}
|
||
}
|
||
|
||
if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
|
||
{
|
||
/* Fill in the first entry in the global offset table.
|
||
We use it to hold the link-time TOCbase. */
|
||
bfd_put_64 (output_bfd,
|
||
elf_gp (output_bfd) + TOC_BASE_OFF,
|
||
htab->sgot->contents);
|
||
|
||
/* Set .got entry size. */
|
||
elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
|
||
}
|
||
|
||
if (htab->splt != NULL && htab->splt->_raw_size != 0)
|
||
{
|
||
/* Set .plt entry size. */
|
||
elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
|
||
= PLT_ENTRY_SIZE;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
|
||
#define TARGET_LITTLE_NAME "elf64-powerpcle"
|
||
#define TARGET_BIG_SYM bfd_elf64_powerpc_vec
|
||
#define TARGET_BIG_NAME "elf64-powerpc"
|
||
#define ELF_ARCH bfd_arch_powerpc
|
||
#define ELF_MACHINE_CODE EM_PPC64
|
||
#define ELF_MAXPAGESIZE 0x10000
|
||
#define elf_info_to_howto ppc64_elf_info_to_howto
|
||
|
||
#ifdef EM_CYGNUS_POWERPC
|
||
#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
|
||
#endif
|
||
|
||
#ifdef EM_PPC_OLD
|
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#define ELF_MACHINE_ALT2 EM_PPC_OLD
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#endif
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#define elf_backend_want_got_sym 0
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#define elf_backend_want_plt_sym 0
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#define elf_backend_plt_alignment 3
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#define elf_backend_plt_not_loaded 1
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#define elf_backend_got_symbol_offset 0
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#define elf_backend_got_header_size 8
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#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
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#define elf_backend_can_gc_sections 1
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#define elf_backend_can_refcount 1
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#define elf_backend_rela_normal 1
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#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
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#define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags
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#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
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#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
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#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
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#define bfd_elf64_get_symbol_info ppc64_elf_get_symbol_info
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#define elf_backend_section_from_shdr ppc64_elf_section_from_shdr
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#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
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#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
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#define elf_backend_check_relocs ppc64_elf_check_relocs
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#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
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#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
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#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
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#define elf_backend_hide_symbol ppc64_elf_hide_symbol
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#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
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#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
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#define elf_backend_fake_sections ppc64_elf_fake_sections
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#define elf_backend_relocate_section ppc64_elf_relocate_section
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#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
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#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
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#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
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|
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#include "elf64-target.h"
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