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[/] [or1k/] [trunk/] [gdb-5.0/] [bfd/] [elf64-sparc.c] - Rev 1772
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/* SPARC-specific support for 64-bit ELF Copyright (C) 1993, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "elf-bfd.h" /* This is defined if one wants to build upward compatible binaries with the original sparc64-elf toolchain. The support is kept in for now but is turned off by default. dje 970930 */ /*#define SPARC64_OLD_RELOCS*/ #include "elf/sparc.h" /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ #define MINUS_ONE (~ (bfd_vma) 0) static struct bfd_link_hash_table * sparc64_elf_bfd_link_hash_table_create PARAMS((bfd *)); static reloc_howto_type *sparc64_elf_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); static void sparc64_elf_info_to_howto PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); static void sparc64_elf_build_plt PARAMS((bfd *, unsigned char *, int)); static bfd_vma sparc64_elf_plt_entry_offset PARAMS((int)); static bfd_vma sparc64_elf_plt_ptr_offset PARAMS((int, int)); static boolean sparc64_elf_check_relocs PARAMS((bfd *, struct bfd_link_info *, asection *sec, const Elf_Internal_Rela *)); static boolean sparc64_elf_adjust_dynamic_symbol PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *)); static boolean sparc64_elf_size_dynamic_sections PARAMS((bfd *, struct bfd_link_info *)); static int sparc64_elf_get_symbol_type PARAMS (( Elf_Internal_Sym *, int)); static boolean sparc64_elf_add_symbol_hook PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, const char **, flagword *, asection **, bfd_vma *)); static void sparc64_elf_symbol_processing PARAMS ((bfd *, asymbol *)); static boolean sparc64_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); static boolean sparc64_elf_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); static boolean sparc64_elf_object_p PARAMS ((bfd *)); static long sparc64_elf_get_reloc_upper_bound PARAMS ((bfd *, asection *)); static long sparc64_elf_get_dynamic_reloc_upper_bound PARAMS ((bfd *)); static boolean sparc64_elf_slurp_one_reloc_table PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, asymbol **, boolean)); static boolean sparc64_elf_slurp_reloc_table PARAMS ((bfd *, asection *, asymbol **, boolean)); static long sparc64_elf_canonicalize_dynamic_reloc PARAMS ((bfd *, arelent **, asymbol **)); static void sparc64_elf_write_relocs PARAMS ((bfd *, asection *, PTR)); /* The relocation "howto" table. */ static bfd_reloc_status_type sparc_elf_notsup_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); static bfd_reloc_status_type sparc_elf_wdisp16_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); static bfd_reloc_status_type sparc_elf_hix22_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); static bfd_reloc_status_type sparc_elf_lox10_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); static reloc_howto_type sparc64_elf_howto_table[] = { HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true), HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true), HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true), HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true), HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true), HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true), HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true), HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true), HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true), HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true), HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true), HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true), HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true), HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true), HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true), HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true), HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true), HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true), HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true), HOWTO(R_SPARC_GLOB_DAT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT",false,0,0x00000000,true), HOWTO(R_SPARC_JMP_SLOT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT",false,0,0x00000000,true), HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true), HOWTO(R_SPARC_UA32, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0x00000000,true), #ifndef SPARC64_OLD_RELOCS /* These aren't implemented yet. */ HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PLT32", false,0,0x00000000,true), HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true), HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true), HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true), HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true), HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true), #endif HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true), HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true), HOWTO(R_SPARC_64, 0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", false,0,MINUS_ONE, true), HOWTO(R_SPARC_OLO10, 0,2,13,false,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", false,0,0x00001fff,true), HOWTO(R_SPARC_HH22, 42,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true), HOWTO(R_SPARC_HM10, 32,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true), HOWTO(R_SPARC_LM22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true), HOWTO(R_SPARC_PC_HH22, 42,2,22,true, 0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_PC_HH22", false,0,0x003fffff,true), HOWTO(R_SPARC_PC_HM10, 32,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_HM10", false,0,0x000003ff,true), HOWTO(R_SPARC_PC_LM22, 10,2,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_LM22", false,0,0x003fffff,true), HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true), HOWTO(R_SPARC_WDISP19, 2,2,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true), HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UNUSED_42",false,0,0x00000000,true), HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true), HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true), HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true), HOWTO(R_SPARC_DISP64, 0,4,64,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", false,0,MINUS_ONE, true), HOWTO(R_SPARC_PLT64, 0,4,64,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_PLT64", false,0,MINUS_ONE, false), HOWTO(R_SPARC_HIX22, 0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", false,0,MINUS_ONE, false), HOWTO(R_SPARC_LOX10, 0,4, 0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", false,0,MINUS_ONE, false), HOWTO(R_SPARC_H44, 22,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", false,0,0x003fffff,false), HOWTO(R_SPARC_M44, 12,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", false,0,0x000003ff,false), HOWTO(R_SPARC_L44, 0,2,13,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", false,0,0x00000fff,false), HOWTO(R_SPARC_REGISTER, 0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",false,0,MINUS_ONE, false), HOWTO(R_SPARC_UA64, 0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", false,0,MINUS_ONE, true), HOWTO(R_SPARC_UA16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", false,0,0x0000ffff,true) }; struct elf_reloc_map { bfd_reloc_code_real_type bfd_reloc_val; unsigned char elf_reloc_val; }; static CONST struct elf_reloc_map sparc_reloc_map[] = { { BFD_RELOC_NONE, R_SPARC_NONE, }, { BFD_RELOC_16, R_SPARC_16, }, { BFD_RELOC_8, R_SPARC_8 }, { BFD_RELOC_8_PCREL, R_SPARC_DISP8 }, { BFD_RELOC_CTOR, R_SPARC_64 }, { BFD_RELOC_32, R_SPARC_32 }, { BFD_RELOC_32_PCREL, R_SPARC_DISP32 }, { BFD_RELOC_HI22, R_SPARC_HI22 }, { BFD_RELOC_LO10, R_SPARC_LO10, }, { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 }, { BFD_RELOC_SPARC22, R_SPARC_22 }, { BFD_RELOC_SPARC13, R_SPARC_13 }, { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 }, { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 }, { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 }, { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 }, { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 }, { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 }, { BFD_RELOC_SPARC_COPY, R_SPARC_COPY }, { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT }, { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT }, { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE }, { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 }, /* ??? Doesn't dwarf use this? */ /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */ {BFD_RELOC_SPARC_10, R_SPARC_10}, {BFD_RELOC_SPARC_11, R_SPARC_11}, {BFD_RELOC_SPARC_64, R_SPARC_64}, {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10}, {BFD_RELOC_SPARC_HH22, R_SPARC_HH22}, {BFD_RELOC_SPARC_HM10, R_SPARC_HM10}, {BFD_RELOC_SPARC_LM22, R_SPARC_LM22}, {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22}, {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10}, {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22}, {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16}, {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19}, {BFD_RELOC_SPARC_7, R_SPARC_7}, {BFD_RELOC_SPARC_5, R_SPARC_5}, {BFD_RELOC_SPARC_6, R_SPARC_6}, {BFD_RELOC_SPARC_DISP64, R_SPARC_DISP64}, {BFD_RELOC_SPARC_PLT64, R_SPARC_PLT64}, {BFD_RELOC_SPARC_HIX22, R_SPARC_HIX22}, {BFD_RELOC_SPARC_LOX10, R_SPARC_LOX10}, {BFD_RELOC_SPARC_H44, R_SPARC_H44}, {BFD_RELOC_SPARC_M44, R_SPARC_M44}, {BFD_RELOC_SPARC_L44, R_SPARC_L44}, {BFD_RELOC_SPARC_REGISTER, R_SPARC_REGISTER} }; static reloc_howto_type * sparc64_elf_reloc_type_lookup (abfd, code) bfd *abfd; bfd_reloc_code_real_type code; { unsigned int i; for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++) { if (sparc_reloc_map[i].bfd_reloc_val == code) return &sparc64_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val]; } return 0; } static void sparc64_elf_info_to_howto (abfd, cache_ptr, dst) bfd *abfd; arelent *cache_ptr; Elf64_Internal_Rela *dst; { BFD_ASSERT (ELF64_R_TYPE_ID (dst->r_info) < (unsigned int) R_SPARC_max_std); cache_ptr->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (dst->r_info)]; } /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA section can represent up to two relocs, we must tell the user to allocate more space. */ static long sparc64_elf_get_reloc_upper_bound (abfd, sec) bfd *abfd; asection *sec; { return (sec->reloc_count * 2 + 1) * sizeof (arelent *); } static long sparc64_elf_get_dynamic_reloc_upper_bound (abfd) bfd *abfd; { return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2; } /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of them. We cannot use generic elf routines for this, because R_SPARC_OLO10 has secondary addend in ELF64_R_TYPE_DATA. We handle it as two relocations for the same location, R_SPARC_LO10 and R_SPARC_13. */ static boolean sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, dynamic) bfd *abfd; asection *asect; Elf_Internal_Shdr *rel_hdr; asymbol **symbols; boolean dynamic; { struct elf_backend_data * const ebd = get_elf_backend_data (abfd); PTR allocated = NULL; bfd_byte *native_relocs; arelent *relent; unsigned int i; int entsize; bfd_size_type count; arelent *relents; allocated = (PTR) bfd_malloc ((size_t) rel_hdr->sh_size); if (allocated == NULL) goto error_return; if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 || (bfd_read (allocated, 1, rel_hdr->sh_size, abfd) != rel_hdr->sh_size)) goto error_return; native_relocs = (bfd_byte *) allocated; relents = asect->relocation + asect->reloc_count; entsize = rel_hdr->sh_entsize; BFD_ASSERT (entsize == sizeof (Elf64_External_Rela)); count = rel_hdr->sh_size / entsize; for (i = 0, relent = relents; i < count; i++, relent++, native_relocs += entsize) { Elf_Internal_Rela rela; bfd_elf64_swap_reloca_in (abfd, (Elf64_External_Rela *) native_relocs, &rela); /* The address of an ELF reloc is section relative for an object file, and absolute for an executable file or shared library. The address of a normal BFD reloc is always section relative, and the address of a dynamic reloc is absolute.. */ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) relent->address = rela.r_offset; else relent->address = rela.r_offset - asect->vma; if (ELF64_R_SYM (rela.r_info) == 0) relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; else { asymbol **ps, *s; ps = symbols + ELF64_R_SYM (rela.r_info) - 1; s = *ps; /* Canonicalize ELF section symbols. FIXME: Why? */ if ((s->flags & BSF_SECTION_SYM) == 0) relent->sym_ptr_ptr = ps; else relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; } relent->addend = rela.r_addend; BFD_ASSERT (ELF64_R_TYPE_ID (rela.r_info) < (unsigned int) R_SPARC_max_std); if (ELF64_R_TYPE_ID (rela.r_info) == R_SPARC_OLO10) { relent->howto = &sparc64_elf_howto_table[R_SPARC_LO10]; relent[1].address = relent->address; relent++; relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; relent->addend = ELF64_R_TYPE_DATA (rela.r_info); relent->howto = &sparc64_elf_howto_table[R_SPARC_13]; } else relent->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (rela.r_info)]; } asect->reloc_count += relent - relents; if (allocated != NULL) free (allocated); return true; error_return: if (allocated != NULL) free (allocated); return false; } /* Read in and swap the external relocs. */ static boolean sparc64_elf_slurp_reloc_table (abfd, asect, symbols, dynamic) bfd *abfd; asection *asect; asymbol **symbols; boolean dynamic; { struct bfd_elf_section_data * const d = elf_section_data (asect); Elf_Internal_Shdr *rel_hdr; Elf_Internal_Shdr *rel_hdr2; if (asect->relocation != NULL) return true; if (! dynamic) { if ((asect->flags & SEC_RELOC) == 0 || asect->reloc_count == 0) return true; rel_hdr = &d->rel_hdr; rel_hdr2 = d->rel_hdr2; BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); } else { /* Note that ASECT->RELOC_COUNT tends not to be accurate in this case because relocations against this section may use the dynamic symbol table, and in that case bfd_section_from_shdr in elf.c does not update the RELOC_COUNT. */ if (asect->_raw_size == 0) return true; rel_hdr = &d->this_hdr; asect->reloc_count = rel_hdr->sh_size / rel_hdr->sh_entsize; rel_hdr2 = NULL; } asect->relocation = ((arelent *) bfd_alloc (abfd, asect->reloc_count * 2 * sizeof (arelent))); if (asect->relocation == NULL) return false; /* The sparc64_elf_slurp_one_reloc_table routine increments reloc_count. */ asect->reloc_count = 0; if (!sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, dynamic)) return false; if (rel_hdr2 && !sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols, dynamic)) return false; return true; } /* Canonicalize the dynamic relocation entries. Note that we return the dynamic relocations as a single block, although they are actually associated with particular sections; the interface, which was designed for SunOS style shared libraries, expects that there is only one set of dynamic relocs. Any section that was actually installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the dynamic symbol table, is considered to be a dynamic reloc section. */ static long sparc64_elf_canonicalize_dynamic_reloc (abfd, storage, syms) bfd *abfd; arelent **storage; asymbol **syms; { asection *s; long ret; if (elf_dynsymtab (abfd) == 0) { bfd_set_error (bfd_error_invalid_operation); return -1; } ret = 0; for (s = abfd->sections; s != NULL; s = s->next) { if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) { arelent *p; long count, i; if (! sparc64_elf_slurp_reloc_table (abfd, s, syms, true)) return -1; count = s->reloc_count; p = s->relocation; for (i = 0; i < count; i++) *storage++ = p++; ret += count; } } *storage = NULL; return ret; } /* Write out the relocs. */ static void sparc64_elf_write_relocs (abfd, sec, data) bfd *abfd; asection *sec; PTR data; { boolean *failedp = (boolean *) data; Elf_Internal_Shdr *rela_hdr; Elf64_External_Rela *outbound_relocas, *src_rela; unsigned int idx, count; asymbol *last_sym = 0; int last_sym_idx = 0; /* If we have already failed, don't do anything. */ if (*failedp) return; if ((sec->flags & SEC_RELOC) == 0) return; /* The linker backend writes the relocs out itself, and sets the reloc_count field to zero to inhibit writing them here. Also, sometimes the SEC_RELOC flag gets set even when there aren't any relocs. */ if (sec->reloc_count == 0) return; /* We can combine two relocs that refer to the same address into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the latter is R_SPARC_13 with no associated symbol. */ count = 0; for (idx = 0; idx < sec->reloc_count; idx++) { bfd_vma addr; unsigned int i; ++count; addr = sec->orelocation[idx]->address; if (sec->orelocation[idx]->howto->type == R_SPARC_LO10 && idx < sec->reloc_count - 1) { arelent *r = sec->orelocation[idx + 1]; if (r->howto->type == R_SPARC_13 && r->address == addr && bfd_is_abs_section ((*r->sym_ptr_ptr)->section) && (*r->sym_ptr_ptr)->value == 0) ++idx; } } rela_hdr = &elf_section_data (sec)->rel_hdr; rela_hdr->sh_size = rela_hdr->sh_entsize * count; rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size); if (rela_hdr->contents == NULL) { *failedp = true; return; } /* Figure out whether the relocations are RELA or REL relocations. */ if (rela_hdr->sh_type != SHT_RELA) abort (); /* orelocation has the data, reloc_count has the count... */ outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents; src_rela = outbound_relocas; for (idx = 0; idx < sec->reloc_count; idx++) { Elf_Internal_Rela dst_rela; arelent *ptr; asymbol *sym; int n; ptr = sec->orelocation[idx]; /* The address of an ELF reloc is section relative for an object file, and absolute for an executable file or shared library. The address of a BFD reloc is always section relative. */ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) dst_rela.r_offset = ptr->address; else dst_rela.r_offset = ptr->address + sec->vma; sym = *ptr->sym_ptr_ptr; if (sym == last_sym) n = last_sym_idx; else if (bfd_is_abs_section (sym->section) && sym->value == 0) n = STN_UNDEF; else { last_sym = sym; n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); if (n < 0) { *failedp = true; return; } last_sym_idx = n; } if ((*ptr->sym_ptr_ptr)->the_bfd != NULL && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec && ! _bfd_elf_validate_reloc (abfd, ptr)) { *failedp = true; return; } if (ptr->howto->type == R_SPARC_LO10 && idx < sec->reloc_count - 1) { arelent *r = sec->orelocation[idx + 1]; if (r->howto->type == R_SPARC_13 && r->address == ptr->address && bfd_is_abs_section ((*r->sym_ptr_ptr)->section) && (*r->sym_ptr_ptr)->value == 0) { idx++; dst_rela.r_info = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend, R_SPARC_OLO10)); } else dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10); } else dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type); dst_rela.r_addend = ptr->addend; bfd_elf64_swap_reloca_out (abfd, &dst_rela, src_rela); ++src_rela; } } /* Sparc64 ELF linker hash table. */ struct sparc64_elf_app_reg { unsigned char bind; unsigned short shndx; bfd *abfd; char *name; }; struct sparc64_elf_link_hash_table { struct elf_link_hash_table root; struct sparc64_elf_app_reg app_regs [4]; }; /* Get the Sparc64 ELF linker hash table from a link_info structure. */ #define sparc64_elf_hash_table(p) \ ((struct sparc64_elf_link_hash_table *) ((p)->hash)) /* Create a Sparc64 ELF linker hash table. */ static struct bfd_link_hash_table * sparc64_elf_bfd_link_hash_table_create (abfd) bfd *abfd; { struct sparc64_elf_link_hash_table *ret; ret = ((struct sparc64_elf_link_hash_table *) bfd_zalloc (abfd, sizeof (struct sparc64_elf_link_hash_table))); if (ret == (struct sparc64_elf_link_hash_table *) NULL) return NULL; if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, _bfd_elf_link_hash_newfunc)) { bfd_release (abfd, ret); return NULL; } return &ret->root.root; } /* Utility for performing the standard initial work of an instruction relocation. *PRELOCATION will contain the relocated item. *PINSN will contain the instruction from the input stream. If the result is `bfd_reloc_other' the caller can continue with performing the relocation. Otherwise it must stop and return the value to its caller. */ static bfd_reloc_status_type init_insn_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, prelocation, pinsn) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; bfd_vma *prelocation; bfd_vma *pinsn; { bfd_vma relocation; reloc_howto_type *howto = reloc_entry->howto; if (output_bfd != (bfd *) NULL && (symbol->flags & BSF_SECTION_SYM) == 0 && (! howto->partial_inplace || reloc_entry->addend == 0)) { reloc_entry->address += input_section->output_offset; return bfd_reloc_ok; } /* This works because partial_inplace == false. */ if (output_bfd != NULL) return bfd_reloc_continue; if (reloc_entry->address > input_section->_cooked_size) return bfd_reloc_outofrange; relocation = (symbol->value + symbol->section->output_section->vma + symbol->section->output_offset); relocation += reloc_entry->addend; if (howto->pc_relative) { relocation -= (input_section->output_section->vma + input_section->output_offset); relocation -= reloc_entry->address; } *prelocation = relocation; *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); return bfd_reloc_other; } /* For unsupported relocs. */ static bfd_reloc_status_type sparc_elf_notsup_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; { return bfd_reloc_notsupported; } /* Handle the WDISP16 reloc. */ static bfd_reloc_status_type sparc_elf_wdisp16_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 relocation; bfd_vma insn; bfd_reloc_status_type status; status = init_insn_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, &relocation, &insn); if (status != bfd_reloc_other) return status; insn = (insn & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6) | ((relocation >> 2) & 0x3fff)); bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); if ((bfd_signed_vma) relocation < - 0x40000 || (bfd_signed_vma) relocation > 0x3ffff) return bfd_reloc_overflow; else return bfd_reloc_ok; } /* Handle the HIX22 reloc. */ static bfd_reloc_status_type sparc_elf_hix22_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 relocation; bfd_vma insn; bfd_reloc_status_type status; status = init_insn_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, &relocation, &insn); if (status != bfd_reloc_other) return status; relocation ^= MINUS_ONE; insn = (insn & ~0x3fffff) | ((relocation >> 10) & 0x3fffff); bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); if ((relocation & ~ (bfd_vma) 0xffffffff) != 0) return bfd_reloc_overflow; else return bfd_reloc_ok; } /* Handle the LOX10 reloc. */ static bfd_reloc_status_type sparc_elf_lox10_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 relocation; bfd_vma insn; bfd_reloc_status_type status; status = init_insn_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, &relocation, &insn); if (status != bfd_reloc_other) return status; insn = (insn & ~0x1fff) | 0x1c00 | (relocation & 0x3ff); bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); return bfd_reloc_ok; } /* PLT/GOT stuff */ /* Both the headers and the entries are icache aligned. */ #define PLT_ENTRY_SIZE 32 #define PLT_HEADER_SIZE (4 * PLT_ENTRY_SIZE) #define LARGE_PLT_THRESHOLD 32768 #define GOT_RESERVED_ENTRIES 1 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1" /* Fill in the .plt section. */ static void sparc64_elf_build_plt (output_bfd, contents, nentries) bfd *output_bfd; unsigned char *contents; int nentries; { const unsigned int nop = 0x01000000; int i, j; /* The first four entries are reserved, and are initially undefined. We fill them with `illtrap 0' to force ld.so to do something. */ for (i = 0; i < PLT_HEADER_SIZE/4; ++i) bfd_put_32 (output_bfd, 0, contents+i*4); /* The first 32768 entries are close enough to plt1 to get there via a straight branch. */ for (i = 4; i < LARGE_PLT_THRESHOLD && i < nentries; ++i) { unsigned char *entry = contents + i * PLT_ENTRY_SIZE; unsigned int sethi, ba; /* sethi (. - plt0), %g1 */ sethi = 0x03000000 | (i * PLT_ENTRY_SIZE); /* ba,a,pt %xcc, plt1 */ ba = 0x30680000 | (((contents+PLT_ENTRY_SIZE) - (entry+4)) / 4 & 0x7ffff); bfd_put_32 (output_bfd, sethi, entry); bfd_put_32 (output_bfd, ba, entry+4); bfd_put_32 (output_bfd, nop, entry+8); bfd_put_32 (output_bfd, nop, entry+12); bfd_put_32 (output_bfd, nop, entry+16); bfd_put_32 (output_bfd, nop, entry+20); bfd_put_32 (output_bfd, nop, entry+24); bfd_put_32 (output_bfd, nop, entry+28); } /* Now the tricky bit. Entries 32768 and higher are grouped in blocks of 160: 160 entries and 160 pointers. This is to separate code from data, which is much friendlier on the cache. */ for (; i < nentries; i += 160) { int block = (i + 160 <= nentries ? 160 : nentries - i); for (j = 0; j < block; ++j) { unsigned char *entry, *ptr; unsigned int ldx; entry = contents + i*PLT_ENTRY_SIZE + j*4*6; ptr = contents + i*PLT_ENTRY_SIZE + block*4*6 + j*8; /* ldx [%o7 + ptr - entry+4], %g1 */ ldx = 0xc25be000 | ((ptr - entry+4) & 0x1fff); bfd_put_32 (output_bfd, 0x8a10000f, entry); /* mov %o7,%g5 */ bfd_put_32 (output_bfd, 0x40000002, entry+4); /* call .+8 */ bfd_put_32 (output_bfd, nop, entry+8); /* nop */ bfd_put_32 (output_bfd, ldx, entry+12); /* ldx [%o7+P],%g1 */ bfd_put_32 (output_bfd, 0x83c3c001, entry+16); /* jmpl %o7+%g1,%g1 */ bfd_put_32 (output_bfd, 0x9e100005, entry+20); /* mov %g5,%o7 */ bfd_put_64 (output_bfd, contents - (entry+4), ptr); } } } /* Return the offset of a particular plt entry within the .plt section. */ static bfd_vma sparc64_elf_plt_entry_offset (index) int index; { int block, ofs; if (index < LARGE_PLT_THRESHOLD) return index * PLT_ENTRY_SIZE; /* See above for details. */ block = (index - LARGE_PLT_THRESHOLD) / 160; ofs = (index - LARGE_PLT_THRESHOLD) % 160; return ((bfd_vma)(LARGE_PLT_THRESHOLD + block*160) * PLT_ENTRY_SIZE + ofs * 6*4); } static bfd_vma sparc64_elf_plt_ptr_offset (index, max) int index, max; { int block, ofs, last; BFD_ASSERT(index >= LARGE_PLT_THRESHOLD); /* See above for details. */ block = (((index - LARGE_PLT_THRESHOLD) / 160) * 160) + LARGE_PLT_THRESHOLD; ofs = index - block; if (block + 160 > max) last = (max - LARGE_PLT_THRESHOLD) % 160; else last = 160; return (block * PLT_ENTRY_SIZE + last * 6*4 + ofs * 8); } /* Look through the relocs for a section during the first phase, and allocate space in the global offset table or procedure linkage table. */ static boolean sparc64_elf_check_relocs (abfd, info, sec, relocs) bfd *abfd; struct bfd_link_info *info; asection *sec; const Elf_Internal_Rela *relocs; { bfd *dynobj; Elf_Internal_Shdr *symtab_hdr; struct elf_link_hash_entry **sym_hashes; bfd_vma *local_got_offsets; const Elf_Internal_Rela *rel; const Elf_Internal_Rela *rel_end; asection *sgot; asection *srelgot; asection *sreloc; if (info->relocateable || !(sec->flags & SEC_ALLOC)) return true; dynobj = elf_hash_table (info)->dynobj; symtab_hdr = &elf_tdata (abfd)->symtab_hdr; sym_hashes = elf_sym_hashes (abfd); local_got_offsets = elf_local_got_offsets (abfd); sgot = NULL; srelgot = NULL; sreloc = NULL; rel_end = relocs + sec->reloc_count; for (rel = relocs; rel < rel_end; rel++) { unsigned long r_symndx; struct elf_link_hash_entry *h; 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]; switch (ELF64_R_TYPE_ID (rel->r_info)) { case R_SPARC_GOT10: case R_SPARC_GOT13: case R_SPARC_GOT22: /* This symbol requires a global offset table entry. */ if (dynobj == NULL) { /* Create the .got section. */ elf_hash_table (info)->dynobj = dynobj = abfd; if (! _bfd_elf_create_got_section (dynobj, info)) return false; } if (sgot == NULL) { sgot = bfd_get_section_by_name (dynobj, ".got"); BFD_ASSERT (sgot != NULL); } if (srelgot == NULL && (h != NULL || info->shared)) { srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); if (srelgot == NULL) { srelgot = bfd_make_section (dynobj, ".rela.got"); if (srelgot == NULL || ! bfd_set_section_flags (dynobj, srelgot, (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED | SEC_READONLY)) || ! bfd_set_section_alignment (dynobj, srelgot, 3)) return false; } } if (h != NULL) { if (h->got.offset != (bfd_vma) -1) { /* We have already allocated space in the .got. */ break; } h->got.offset = sgot->_raw_size; /* Make sure this symbol is output as a dynamic symbol. */ if (h->dynindx == -1) { if (! bfd_elf64_link_record_dynamic_symbol (info, h)) return false; } srelgot->_raw_size += sizeof (Elf64_External_Rela); } else { /* This is a global offset table entry for a local symbol. */ if (local_got_offsets == NULL) { size_t size; register unsigned int i; size = symtab_hdr->sh_info * sizeof (bfd_vma); local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); if (local_got_offsets == NULL) return false; elf_local_got_offsets (abfd) = local_got_offsets; for (i = 0; i < symtab_hdr->sh_info; i++) local_got_offsets[i] = (bfd_vma) -1; } if (local_got_offsets[r_symndx] != (bfd_vma) -1) { /* We have already allocated space in the .got. */ break; } local_got_offsets[r_symndx] = sgot->_raw_size; if (info->shared) { /* If we are generating a shared object, we need to output a R_SPARC_RELATIVE reloc so that the dynamic linker can adjust this GOT entry. */ srelgot->_raw_size += sizeof (Elf64_External_Rela); } } sgot->_raw_size += 8; #if 0 /* Doesn't work for 64-bit -fPIC, since sethi/or builds unsigned numbers. If we permit ourselves to modify code so we get sethi/xor, this could work. Question: do we consider conditionally re-enabling this for -fpic, once we know about object code models? */ /* If the .got section is more than 0x1000 bytes, we add 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 bit relocations have a greater chance of working. */ if (sgot->_raw_size >= 0x1000 && elf_hash_table (info)->hgot->root.u.def.value == 0) elf_hash_table (info)->hgot->root.u.def.value = 0x1000; #endif break; case R_SPARC_WPLT30: case R_SPARC_PLT32: case R_SPARC_HIPLT22: case R_SPARC_LOPLT10: case R_SPARC_PCPLT32: case R_SPARC_PCPLT22: case R_SPARC_PCPLT10: case R_SPARC_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; } /* Make sure this symbol is output as a dynamic symbol. */ if (h->dynindx == -1) { if (! bfd_elf64_link_record_dynamic_symbol (info, h)) return false; } h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; break; case R_SPARC_PC10: case R_SPARC_PC22: case R_SPARC_PC_HH22: case R_SPARC_PC_HM10: case R_SPARC_PC_LM22: if (h != NULL && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) break; /* Fall through. */ case R_SPARC_DISP8: case R_SPARC_DISP16: case R_SPARC_DISP32: case R_SPARC_DISP64: case R_SPARC_WDISP30: case R_SPARC_WDISP22: case R_SPARC_WDISP19: case R_SPARC_WDISP16: if (h == NULL) break; /* Fall through. */ case R_SPARC_8: case R_SPARC_16: case R_SPARC_32: case R_SPARC_HI22: case R_SPARC_22: case R_SPARC_13: case R_SPARC_LO10: case R_SPARC_UA32: case R_SPARC_10: case R_SPARC_11: case R_SPARC_64: case R_SPARC_OLO10: case R_SPARC_HH22: case R_SPARC_HM10: case R_SPARC_LM22: case R_SPARC_7: case R_SPARC_5: case R_SPARC_6: case R_SPARC_HIX22: case R_SPARC_LOX10: case R_SPARC_H44: case R_SPARC_M44: case R_SPARC_L44: case R_SPARC_UA64: case R_SPARC_UA16: /* When creating a shared object, we must copy these relocs into the output file. We create a reloc section in dynobj and make room for the reloc. But don't do this for debugging sections -- this shows up with DWARF2 -- first because they are not loaded, and second because DWARF sez the debug info is not to be biased by the load address. */ if (info->shared && (sec->flags & SEC_ALLOC)) { if (sreloc == NULL) { const char *name; 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; BFD_ASSERT (strncmp (name, ".rela", 5) == 0 && strcmp (bfd_get_section_name (abfd, sec), name + 5) == 0); 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; } } sreloc->_raw_size += sizeof (Elf64_External_Rela); } break; case R_SPARC_REGISTER: /* Nothing to do. */ break; default: (*_bfd_error_handler)(_("%s: check_relocs: unhandled reloc type %d"), bfd_get_filename(abfd), ELF64_R_TYPE_ID (rel->r_info)); return false; } } return true; } /* Hook called by the linker routine which adds symbols from an object file. We use it for STT_REGISTER symbols. */ static boolean sparc64_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) bfd *abfd; struct bfd_link_info *info; const Elf_Internal_Sym *sym; const char **namep; flagword *flagsp; asection **secp; bfd_vma *valp; { static char *stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" }; if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER) { int reg; struct sparc64_elf_app_reg *p; reg = (int)sym->st_value; switch (reg & ~1) { case 2: reg -= 2; break; case 6: reg -= 4; break; default: (*_bfd_error_handler) (_("%s: Only registers %%g[2367] can be declared using STT_REGISTER"), bfd_get_filename (abfd)); return false; } if (info->hash->creator != abfd->xvec || (abfd->flags & DYNAMIC) != 0) { /* STT_REGISTER only works when linking an elf64_sparc object. If STT_REGISTER comes from a dynamic object, don't put it into the output bfd. The dynamic linker will recheck it. */ *namep = NULL; return true; } p = sparc64_elf_hash_table(info)->app_regs + reg; if (p->name != NULL && strcmp (p->name, *namep)) { (*_bfd_error_handler) (_("Register %%g%d used incompatibly: " "previously declared in %s to %s, in %s redefined to %s"), (int)sym->st_value, bfd_get_filename (p->abfd), *p->name ? p->name : "#scratch", bfd_get_filename (abfd), **namep ? *namep : "#scratch"); return false; } if (p->name == NULL) { if (**namep) { struct elf_link_hash_entry *h; h = (struct elf_link_hash_entry *) bfd_link_hash_lookup (info->hash, *namep, false, false, false); if (h != NULL) { unsigned char type = h->type; if (type > STT_FUNC) type = 0; (*_bfd_error_handler) (_("Symbol `%s' has differing types: " "previously %s, REGISTER in %s"), *namep, stt_types [type], bfd_get_filename (abfd)); return false; } p->name = bfd_hash_allocate (&info->hash->table, strlen (*namep) + 1); if (!p->name) return false; strcpy (p->name, *namep); } else p->name = ""; p->bind = ELF_ST_BIND (sym->st_info); p->abfd = abfd; p->shndx = sym->st_shndx; } else { if (p->bind == STB_WEAK && ELF_ST_BIND (sym->st_info) == STB_GLOBAL) { p->bind = STB_GLOBAL; p->abfd = abfd; } } *namep = NULL; return true; } else if (! *namep || ! **namep) return true; else { int i; struct sparc64_elf_app_reg *p; p = sparc64_elf_hash_table(info)->app_regs; for (i = 0; i < 4; i++, p++) if (p->name != NULL && ! strcmp (p->name, *namep)) { unsigned char type = ELF_ST_TYPE (sym->st_info); if (type > STT_FUNC) type = 0; (*_bfd_error_handler) (_("Symbol `%s' has differing types: " "REGISTER in %s, %s in %s"), *namep, bfd_get_filename (p->abfd), stt_types [type], bfd_get_filename (abfd)); return false; } } return true; } /* This function takes care of emiting STT_REGISTER symbols which we cannot easily keep in the symbol hash table. */ static boolean sparc64_elf_output_arch_syms (output_bfd, info, finfo, func) bfd *output_bfd; struct bfd_link_info *info; PTR finfo; boolean (*func) PARAMS ((PTR, const char *, Elf_Internal_Sym *, asection *)); { int reg; struct sparc64_elf_app_reg *app_regs = sparc64_elf_hash_table(info)->app_regs; Elf_Internal_Sym sym; /* We arranged in size_dynamic_sections to put the STT_REGISTER entries at the end of the dynlocal list, so they came at the end of the local symbols in the symtab. Except that they aren't STB_LOCAL, so we need to back up symtab->sh_info. */ if (elf_hash_table (info)->dynlocal) { bfd * dynobj = elf_hash_table (info)->dynobj; asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym"); struct elf_link_local_dynamic_entry *e; for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) if (e->input_indx == -1) break; if (e) { elf_section_data (dynsymsec->output_section)->this_hdr.sh_info = e->dynindx; } } if (info->strip == strip_all) return true; for (reg = 0; reg < 4; reg++) if (app_regs [reg].name != NULL) { if (info->strip == strip_some && bfd_hash_lookup (info->keep_hash, app_regs [reg].name, false, false) == NULL) continue; sym.st_value = reg < 2 ? reg + 2 : reg + 4; sym.st_size = 0; sym.st_other = 0; sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER); sym.st_shndx = app_regs [reg].shndx; if (! (*func) (finfo, app_regs [reg].name, &sym, sym.st_shndx == SHN_ABS ? bfd_abs_section_ptr : bfd_und_section_ptr)) return false; } return true; } static int sparc64_elf_get_symbol_type (elf_sym, type) Elf_Internal_Sym * elf_sym; int type; { if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER) return STT_REGISTER; else return type; } /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL even in SHN_UNDEF section. */ static void sparc64_elf_symbol_processing (abfd, asym) bfd *abfd; asymbol *asym; { elf_symbol_type *elfsym; elfsym = (elf_symbol_type *) asym; if (elfsym->internal_elf_sym.st_info == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER)) { asym->flags |= BSF_GLOBAL; } } /* 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 sparc64_elf_adjust_dynamic_symbol (info, h) struct bfd_link_info *info; struct elf_link_hash_entry *h; { bfd *dynobj; asection *s; unsigned int power_of_two; dynobj = elf_hash_table (info)->dynobj; /* Make sure we know what is going on here. */ BFD_ASSERT (dynobj != NULL && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) || h->weakdef != NULL || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))); /* If this is a function, put it in the procedure linkage table. We will fill in the contents of the procedure linkage table later (although we could actually do it here). The STT_NOTYPE condition is a hack specifically for the Oracle libraries delivered for Solaris; for some inexplicable reason, they define some of their functions as STT_NOTYPE when they really should be STT_FUNC. */ if (h->type == STT_FUNC || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 || (h->type == STT_NOTYPE && (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak) && (h->root.u.def.section->flags & SEC_CODE) != 0)) { if (! elf_hash_table (info)->dynamic_sections_created) { /* This case can occur if we saw a WPLT30 reloc in an input file, but none of the input files were dynamic objects. In such a case, we don't actually need to build a procedure linkage table, and we can just do a WDISP30 reloc instead. */ BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); return true; } s = bfd_get_section_by_name (dynobj, ".plt"); BFD_ASSERT (s != NULL); /* The first four bit in .plt is reserved. */ if (s->_raw_size == 0) s->_raw_size = PLT_HEADER_SIZE; /* If this symbol is not defined in a regular file, and we are not generating a shared library, then set the symbol to this location in the .plt. This is required to make function pointers compare as equal between the normal executable and the shared library. */ if (! info->shared && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) { h->root.u.def.section = s; h->root.u.def.value = s->_raw_size; } /* To simplify matters later, just store the plt index here. */ h->plt.offset = s->_raw_size / PLT_ENTRY_SIZE; /* Make room for this entry. */ s->_raw_size += PLT_ENTRY_SIZE; /* We also need to make an entry in the .rela.plt section. */ s = bfd_get_section_by_name (dynobj, ".rela.plt"); BFD_ASSERT (s != NULL); /* The first plt entries are reserved, and the relocations must pair up exactly. */ if (s->_raw_size == 0) s->_raw_size += (PLT_HEADER_SIZE/PLT_ENTRY_SIZE * sizeof (Elf64_External_Rela)); s->_raw_size += sizeof (Elf64_External_Rela); /* The procedure linkage table size is bounded by the magnitude of the offset we can describe in the entry. */ if (s->_raw_size >= (bfd_vma)1 << 32) { bfd_set_error (bfd_error_bad_value); return false; } return true; } /* 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; /* 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. */ s = bfd_get_section_by_name (dynobj, ".dynbss"); BFD_ASSERT (s != NULL); /* We must generate a R_SPARC_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 .rel.bss section we are going to use. */ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) { asection *srel; srel = bfd_get_section_by_name (dynobj, ".rela.bss"); BFD_ASSERT (srel != NULL); srel->_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. 16-bytes is the size of the largest type that requires hard alignment -- long double. */ power_of_two = bfd_log2 (h->size); if (power_of_two > 4) power_of_two = 4; /* Apply the required alignment. */ s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); if (power_of_two > bfd_get_section_alignment (dynobj, s)) { if (! bfd_set_section_alignment (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; } /* Set the sizes of the dynamic sections. */ static boolean sparc64_elf_size_dynamic_sections (output_bfd, info) bfd *output_bfd; struct bfd_link_info *info; { bfd *dynobj; asection *s; boolean reltext; boolean relplt; dynobj = elf_hash_table (info)->dynobj; BFD_ASSERT (dynobj != NULL); if (elf_hash_table (info)->dynamic_sections_created) { /* Set the contents of the .interp section to the interpreter. */ if (! info->shared) { s = bfd_get_section_by_name (dynobj, ".interp"); BFD_ASSERT (s != NULL); s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; } } else { /* We may have created entries in the .rela.got section. However, if we are not creating the dynamic sections, we will not actually use these entries. Reset the size of .rela.got, which will cause it to get stripped from the output file below. */ s = bfd_get_section_by_name (dynobj, ".rela.got"); if (s != NULL) s->_raw_size = 0; } /* The check_relocs and adjust_dynamic_symbol entry points have determined the sizes of the various dynamic sections. Allocate memory for them. */ reltext = false; relplt = false; for (s = dynobj->sections; s != NULL; s = s->next) { const char *name; boolean strip; if ((s->flags & SEC_LINKER_CREATED) == 0) continue; /* It's OK to base decisions on the section name, because none of the dynobj section names depend upon the input files. */ name = bfd_get_section_name (dynobj, s); strip = false; if (strncmp (name, ".rela", 5) == 0) { if (s->_raw_size == 0) { /* If we don't need this section, strip it from the output file. This is to handle .rela.bss and .rel.plt. We must create it in create_dynamic_sections, because it must be created before the linker maps input sections to output sections. The linker does that before adjust_dynamic_symbol is called, and it is that function which decides whether anything needs to go into these sections. */ strip = true; } else { const char *outname; asection *target; /* If this relocation section applies to a read only section, then we probably need a DT_TEXTREL entry. */ outname = bfd_get_section_name (output_bfd, s->output_section); target = bfd_get_section_by_name (output_bfd, outname + 5); if (target != NULL && (target->flags & SEC_READONLY) != 0) reltext = true; if (strcmp (name, ".rela.plt") == 0) relplt = true; /* We use the reloc_count field as a counter if we need to copy relocs into the output file. */ s->reloc_count = 0; } } else if (strcmp (name, ".plt") != 0 && strncmp (name, ".got", 4) != 0) { /* It's not one of our sections, so don't allocate space. */ continue; } if (strip) { _bfd_strip_section_from_output (info, s); continue; } /* Allocate memory for the section contents. Zero the memory for the benefit of .rela.plt, which has 4 unused entries at the beginning, and we don't want garbage. */ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); if (s->contents == NULL && s->_raw_size != 0) return false; } if (elf_hash_table (info)->dynamic_sections_created) { /* Add some entries to the .dynamic section. We fill in the values later, in sparc64_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. */ int reg; struct sparc64_elf_app_reg * app_regs; struct bfd_strtab_hash *dynstr; struct elf_link_hash_table *eht = elf_hash_table (info); if (! info->shared) { if (! bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0)) return false; } if (relplt) { if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0) || ! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0) || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA) || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0)) return false; } if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0) || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0) || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT, sizeof (Elf64_External_Rela))) return false; if (reltext) { if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0)) return false; } /* Add dynamic STT_REGISTER symbols and corresponding DT_SPARC_REGISTER entries if needed. */ app_regs = sparc64_elf_hash_table (info)->app_regs; dynstr = eht->dynstr; for (reg = 0; reg < 4; reg++) if (app_regs [reg].name != NULL) { struct elf_link_local_dynamic_entry *entry, *e; if (! bfd_elf64_add_dynamic_entry (info, DT_SPARC_REGISTER, 0)) return false; entry = (struct elf_link_local_dynamic_entry *) bfd_hash_allocate (&info->hash->table, sizeof (*entry)); if (entry == NULL) return false; /* We cheat here a little bit: the symbol will not be local, so we put it at the end of the dynlocal linked list. We will fix it later on, as we have to fix other fields anyway. */ entry->isym.st_value = reg < 2 ? reg + 2 : reg + 4; entry->isym.st_size = 0; if (*app_regs [reg].name != '\0') entry->isym.st_name = _bfd_stringtab_add (dynstr, app_regs[reg].name, true, false); else entry->isym.st_name = 0; entry->isym.st_other = 0; entry->isym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER); entry->isym.st_shndx = app_regs [reg].shndx; entry->next = NULL; entry->input_bfd = output_bfd; entry->input_indx = -1; if (eht->dynlocal == NULL) eht->dynlocal = entry; else { for (e = eht->dynlocal; e->next; e = e->next) ; e->next = entry; } eht->dynsymcount++; } } return true; } /* Relocate a SPARC64 ELF section. */ static boolean sparc64_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; { bfd *dynobj; Elf_Internal_Shdr *symtab_hdr; struct elf_link_hash_entry **sym_hashes; bfd_vma *local_got_offsets; bfd_vma got_base; asection *sgot; asection *splt; asection *sreloc; Elf_Internal_Rela *rel; Elf_Internal_Rela *relend; dynobj = elf_hash_table (info)->dynobj; symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; sym_hashes = elf_sym_hashes (input_bfd); local_got_offsets = elf_local_got_offsets (input_bfd); if (elf_hash_table(info)->hgot == NULL) got_base = 0; else got_base = elf_hash_table (info)->hgot->root.u.def.value; sgot = splt = sreloc = NULL; rel = relocs; relend = relocs + input_section->reloc_count; for (; rel < relend; rel++) { int r_type; reloc_howto_type *howto; long r_symndx; struct elf_link_hash_entry *h; Elf_Internal_Sym *sym; asection *sec; bfd_vma relocation; bfd_reloc_status_type r; r_type = ELF64_R_TYPE_ID (rel->r_info); if (r_type < 0 || r_type >= (int) R_SPARC_max_std) { bfd_set_error (bfd_error_bad_value); return false; } howto = sparc64_elf_howto_table + r_type; r_symndx = ELF64_R_SYM (rel->r_info); if (info->relocateable) { /* This is a relocateable link. We don't have to change anything, unless the reloc is against a section symbol, in which case we have to adjust according to where the section symbol winds up in the output section. */ if (r_symndx < symtab_hdr->sh_info) { sym = local_syms + r_symndx; if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) { sec = local_sections[r_symndx]; rel->r_addend += sec->output_offset + sym->st_value; } } continue; } /* This is a final link. */ h = NULL; sym = NULL; sec = NULL; if (r_symndx < symtab_hdr->sh_info) { sym = local_syms + r_symndx; sec = local_sections[r_symndx]; relocation = (sec->output_section->vma + sec->output_offset + sym->st_value); } else { h = sym_hashes[r_symndx - symtab_hdr->sh_info]; while (h->root.type == bfd_link_hash_indirect || h->root.type == bfd_link_hash_warning) h = (struct elf_link_hash_entry *) h->root.u.i.link; if (h->root.type == bfd_link_hash_defined || h->root.type == bfd_link_hash_defweak) { boolean skip_it = false; sec = h->root.u.def.section; switch (r_type) { case R_SPARC_WPLT30: case R_SPARC_PLT32: case R_SPARC_HIPLT22: case R_SPARC_LOPLT10: case R_SPARC_PCPLT32: case R_SPARC_PCPLT22: case R_SPARC_PCPLT10: case R_SPARC_PLT64: if (h->plt.offset != (bfd_vma) -1) skip_it = true; break; case R_SPARC_GOT10: case R_SPARC_GOT13: case R_SPARC_GOT22: if (elf_hash_table(info)->dynamic_sections_created && (!info->shared || (!info->symbolic && h->dynindx != -1) || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) skip_it = true; break; case R_SPARC_PC10: case R_SPARC_PC22: case R_SPARC_PC_HH22: case R_SPARC_PC_HM10: case R_SPARC_PC_LM22: if (!strcmp(h->root.root.string, "_GLOBAL_OFFSET_TABLE_")) break; /* FALLTHRU */ case R_SPARC_8: case R_SPARC_16: case R_SPARC_32: case R_SPARC_DISP8: case R_SPARC_DISP16: case R_SPARC_DISP32: case R_SPARC_WDISP30: case R_SPARC_WDISP22: case R_SPARC_HI22: case R_SPARC_22: case R_SPARC_13: case R_SPARC_LO10: case R_SPARC_UA32: case R_SPARC_10: case R_SPARC_11: case R_SPARC_64: case R_SPARC_OLO10: case R_SPARC_HH22: case R_SPARC_HM10: case R_SPARC_LM22: case R_SPARC_WDISP19: case R_SPARC_WDISP16: case R_SPARC_7: case R_SPARC_5: case R_SPARC_6: case R_SPARC_DISP64: case R_SPARC_HIX22: case R_SPARC_LOX10: case R_SPARC_H44: case R_SPARC_M44: case R_SPARC_L44: case R_SPARC_UA64: case R_SPARC_UA16: if (info->shared && ((!info->symbolic && h->dynindx != -1) || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) skip_it = true; break; } if (skip_it) { /* In these cases, we don't need the relocation value. We check specially because in some obscure cases sec->output_section will be NULL. */ relocation = 0; } else { relocation = (h->root.u.def.value + sec->output_section->vma + sec->output_offset); } } else if (h->root.type == bfd_link_hash_undefweak) relocation = 0; else if (info->shared && !info->symbolic && !info->no_undefined) relocation = 0; else { if (! ((*info->callbacks->undefined_symbol) (info, h->root.root.string, input_bfd, input_section, rel->r_offset, (!info->shared || info->no_undefined)))) return false; relocation = 0; } } /* When generating a shared object, these relocations are copied into the output file to be resolved at run time. */ if (info->shared && (input_section->flags & SEC_ALLOC)) { switch (r_type) { case R_SPARC_PC10: case R_SPARC_PC22: case R_SPARC_PC_HH22: case R_SPARC_PC_HM10: case R_SPARC_PC_LM22: if (h != NULL && !strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_")) break; /* Fall through. */ case R_SPARC_DISP8: case R_SPARC_DISP16: case R_SPARC_DISP32: case R_SPARC_WDISP30: case R_SPARC_WDISP22: case R_SPARC_WDISP19: case R_SPARC_WDISP16: case R_SPARC_DISP64: if (h == NULL) break; /* Fall through. */ case R_SPARC_8: case R_SPARC_16: case R_SPARC_32: case R_SPARC_HI22: case R_SPARC_22: case R_SPARC_13: case R_SPARC_LO10: case R_SPARC_UA32: case R_SPARC_10: case R_SPARC_11: case R_SPARC_64: case R_SPARC_OLO10: case R_SPARC_HH22: case R_SPARC_HM10: case R_SPARC_LM22: case R_SPARC_7: case R_SPARC_5: case R_SPARC_6: case R_SPARC_HIX22: case R_SPARC_LOX10: case R_SPARC_H44: case R_SPARC_M44: case R_SPARC_L44: case R_SPARC_UA64: case R_SPARC_UA16: { Elf_Internal_Rela outrel; boolean skip; if (sreloc == NULL) { const char *name = (bfd_elf_string_from_elf_section (input_bfd, elf_elfheader (input_bfd)->e_shstrndx, elf_section_data (input_section)->rel_hdr.sh_name)); if (name == NULL) return false; BFD_ASSERT (strncmp (name, ".rela", 5) == 0 && strcmp (bfd_get_section_name(input_bfd, input_section), name + 5) == 0); sreloc = bfd_get_section_by_name (dynobj, name); BFD_ASSERT (sreloc != NULL); } skip = false; if (elf_section_data (input_section)->stab_info == NULL) outrel.r_offset = rel->r_offset; else { bfd_vma off; off = (_bfd_stab_section_offset (output_bfd, &elf_hash_table (info)->stab_info, input_section, &elf_section_data (input_section)->stab_info, rel->r_offset)); if (off == MINUS_ONE) skip = true; outrel.r_offset = off; } outrel.r_offset += (input_section->output_section->vma + input_section->output_offset); /* Optimize unaligned reloc usage now that we know where it finally resides. */ switch (r_type) { case R_SPARC_16: if (outrel.r_offset & 1) r_type = R_SPARC_UA16; break; case R_SPARC_UA16: if (!(outrel.r_offset & 1)) r_type = R_SPARC_16; break; case R_SPARC_32: if (outrel.r_offset & 3) r_type = R_SPARC_UA32; break; case R_SPARC_UA32: if (!(outrel.r_offset & 3)) r_type = R_SPARC_32; break; case R_SPARC_64: if (outrel.r_offset & 7) r_type = R_SPARC_UA64; break; case R_SPARC_UA64: if (!(outrel.r_offset & 7)) r_type = R_SPARC_64; break; } if (skip) memset (&outrel, 0, sizeof outrel); /* h->dynindx may be -1 if the symbol was marked to become local. */ else if (h != NULL && ((! info->symbolic && h->dynindx != -1) || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) { BFD_ASSERT (h->dynindx != -1); outrel.r_info = ELF64_R_INFO (h->dynindx, ELF64_R_TYPE_INFO ( ELF64_R_TYPE_DATA (rel->r_info), r_type)); outrel.r_addend = rel->r_addend; } else { if (r_type == R_SPARC_64) { outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); outrel.r_addend = relocation + rel->r_addend; } else { long indx; if (h == NULL) sec = local_sections[r_symndx]; else { BFD_ASSERT (h->root.type == bfd_link_hash_defined || (h->root.type == bfd_link_hash_defweak)); sec = h->root.u.def.section; } if (sec != NULL && bfd_is_abs_section (sec)) indx = 0; 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; /* FIXME: we really should be able to link non-pic shared libraries. */ if (indx == 0) { BFD_FAIL (); (*_bfd_error_handler) (_("%s: probably compiled without -fPIC?"), bfd_get_filename (input_bfd)); bfd_set_error (bfd_error_bad_value); return false; } } outrel.r_info = ELF64_R_INFO (indx, ELF64_R_TYPE_INFO ( ELF64_R_TYPE_DATA (rel->r_info), r_type)); outrel.r_addend = relocation + rel->r_addend; } } bfd_elf64_swap_reloca_out (output_bfd, &outrel, (((Elf64_External_Rela *) sreloc->contents) + sreloc->reloc_count)); ++sreloc->reloc_count; /* This reloc will be computed at runtime, so there's no need to do anything now, unless this is a RELATIVE reloc in an unallocated section. */ if (skip || (input_section->flags & SEC_ALLOC) != 0 || ELF64_R_TYPE_ID (outrel.r_info) != R_SPARC_RELATIVE) continue; } break; } } switch (r_type) { case R_SPARC_GOT10: case R_SPARC_GOT13: case R_SPARC_GOT22: /* Relocation is to the entry for this symbol in the global offset table. */ if (sgot == NULL) { sgot = bfd_get_section_by_name (dynobj, ".got"); BFD_ASSERT (sgot != NULL); } if (h != NULL) { bfd_vma off = h->got.offset; BFD_ASSERT (off != (bfd_vma) -1); if (! elf_hash_table (info)->dynamic_sections_created || (info->shared && (info->symbolic || h->dynindx == -1) && (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 .rela.got relocation entry to initialize the value. This is done in the finish_dynamic_symbol routine. */ if ((off & 1) != 0) off &= ~1; else { bfd_put_64 (output_bfd, relocation, sgot->contents + off); h->got.offset |= 1; } } relocation = sgot->output_offset + off - got_base; } else { bfd_vma off; BFD_ASSERT (local_got_offsets != NULL); off = local_got_offsets[r_symndx]; BFD_ASSERT (off != (bfd_vma) -1); /* 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, sgot->contents + off); local_got_offsets[r_symndx] |= 1; if (info->shared) { asection *srelgot; Elf_Internal_Rela outrel; /* We need to generate a R_SPARC_RELATIVE reloc for the dynamic linker. */ srelgot = bfd_get_section_by_name(dynobj, ".rela.got"); BFD_ASSERT (srelgot != NULL); outrel.r_offset = (sgot->output_section->vma + sgot->output_offset + off); outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); outrel.r_addend = relocation; bfd_elf64_swap_reloca_out (output_bfd, &outrel, (((Elf64_External_Rela *) srelgot->contents) + srelgot->reloc_count)); ++srelgot->reloc_count; } } relocation = sgot->output_offset + off - got_base; } goto do_default; case R_SPARC_WPLT30: case R_SPARC_PLT32: case R_SPARC_HIPLT22: case R_SPARC_LOPLT10: case R_SPARC_PCPLT32: case R_SPARC_PCPLT22: case R_SPARC_PCPLT10: case R_SPARC_PLT64: /* Relocation is to the entry for this symbol in the procedure linkage table. */ BFD_ASSERT (h != NULL); if (h->plt.offset == (bfd_vma) -1) { /* We didn't make a PLT entry for this symbol. This happens when statically linking PIC code, or when using -Bsymbolic. */ goto do_default; } if (splt == NULL) { splt = bfd_get_section_by_name (dynobj, ".plt"); BFD_ASSERT (splt != NULL); } relocation = (splt->output_section->vma + splt->output_offset + sparc64_elf_plt_entry_offset (h->plt.offset)); goto do_default; case R_SPARC_OLO10: { bfd_vma x; relocation += rel->r_addend; relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info); x = bfd_get_32 (input_bfd, contents + rel->r_offset); x = (x & ~0x1fff) | (relocation & 0x1fff); bfd_put_32 (input_bfd, x, contents + rel->r_offset); r = bfd_check_overflow (howto->complain_on_overflow, howto->bitsize, howto->rightshift, bfd_arch_bits_per_address (input_bfd), relocation); } break; case R_SPARC_WDISP16: { bfd_vma x; relocation += rel->r_addend; /* Adjust for pc-relative-ness. */ relocation -= (input_section->output_section->vma + input_section->output_offset); relocation -= rel->r_offset; x = bfd_get_32 (input_bfd, contents + rel->r_offset); x = (x & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6) | ((relocation >> 2) & 0x3fff)); bfd_put_32 (input_bfd, x, contents + rel->r_offset); r = bfd_check_overflow (howto->complain_on_overflow, howto->bitsize, howto->rightshift, bfd_arch_bits_per_address (input_bfd), relocation); } break; case R_SPARC_HIX22: { bfd_vma x; relocation += rel->r_addend; relocation = relocation ^ MINUS_ONE; x = bfd_get_32 (input_bfd, contents + rel->r_offset); x = (x & ~0x3fffff) | ((relocation >> 10) & 0x3fffff); bfd_put_32 (input_bfd, x, contents + rel->r_offset); r = bfd_check_overflow (howto->complain_on_overflow, howto->bitsize, howto->rightshift, bfd_arch_bits_per_address (input_bfd), relocation); } break; case R_SPARC_LOX10: { bfd_vma x; relocation += rel->r_addend; relocation = (relocation & 0x3ff) | 0x1c00; x = bfd_get_32 (input_bfd, contents + rel->r_offset); x = (x & ~0x1fff) | relocation; bfd_put_32 (input_bfd, x, contents + rel->r_offset); r = bfd_reloc_ok; } break; default: do_default: r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, rel->r_offset, relocation, rel->r_addend); break; } switch (r) { case bfd_reloc_ok: break; default: case bfd_reloc_outofrange: abort (); case bfd_reloc_overflow: { const char *name; if (h != NULL) { if (h->root.type == bfd_link_hash_undefweak && howto->pc_relative) { /* Assume this is a call protected by other code that detect 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. */ break; } name = h->root.root.string; } else { name = (bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name)); if (name == NULL) return false; if (*name == '\0') name = bfd_section_name (input_bfd, sec); } if (! ((*info->callbacks->reloc_overflow) (info, name, howto->name, (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) return false; } break; } } return true; } /* Finish up dynamic symbol handling. We set the contents of various dynamic sections here. */ static boolean sparc64_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; { bfd *dynobj; dynobj = elf_hash_table (info)->dynobj; if (h->plt.offset != (bfd_vma) -1) { asection *splt; asection *srela; Elf_Internal_Rela rela; /* This symbol has an entry in the PLT. Set it up. */ BFD_ASSERT (h->dynindx != -1); splt = bfd_get_section_by_name (dynobj, ".plt"); srela = bfd_get_section_by_name (dynobj, ".rela.plt"); BFD_ASSERT (splt != NULL && srela != NULL); /* Fill in the entry in the .rela.plt section. */ if (h->plt.offset < LARGE_PLT_THRESHOLD) { rela.r_offset = sparc64_elf_plt_entry_offset (h->plt.offset); rela.r_addend = 0; } else { int max = splt->_raw_size / PLT_ENTRY_SIZE; rela.r_offset = sparc64_elf_plt_ptr_offset (h->plt.offset, max); rela.r_addend = -(sparc64_elf_plt_entry_offset (h->plt.offset) + 4) -(splt->output_section->vma + splt->output_offset); } rela.r_offset += (splt->output_section->vma + splt->output_offset); rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_JMP_SLOT); bfd_elf64_swap_reloca_out (output_bfd, &rela, ((Elf64_External_Rela *) srela->contents + h->plt.offset)); if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) { /* Mark the symbol as undefined, rather than as defined in the .plt section. Leave the value alone. */ sym->st_shndx = SHN_UNDEF; } } if (h->got.offset != (bfd_vma) -1) { asection *sgot; asection *srela; Elf_Internal_Rela rela; /* This symbol has an entry in the GOT. Set it up. */ sgot = bfd_get_section_by_name (dynobj, ".got"); srela = bfd_get_section_by_name (dynobj, ".rela.got"); BFD_ASSERT (sgot != NULL && srela != NULL); rela.r_offset = (sgot->output_section->vma + sgot->output_offset + (h->got.offset &~ 1)); /* If this is a -Bsymbolic link, and the symbol is defined locally, we just want to emit a RELATIVE reloc. Likewise if the symbol was forced to be local because of a version file. The entry in the global offset table will already have been initialized in the relocate_section function. */ if (info->shared && (info->symbolic || h->dynindx == -1) && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) { asection *sec = h->root.u.def.section; rela.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); rela.r_addend = (h->root.u.def.value + sec->output_section->vma + sec->output_offset); } else { bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_GLOB_DAT); rela.r_addend = 0; } bfd_elf64_swap_reloca_out (output_bfd, &rela, ((Elf64_External_Rela *) srela->contents + srela->reloc_count)); ++srela->reloc_count; } if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) { asection *s; Elf_Internal_Rela rela; /* This symbols needs a copy reloc. Set it up. */ BFD_ASSERT (h->dynindx != -1); s = bfd_get_section_by_name (h->root.u.def.section->owner, ".rela.bss"); BFD_ASSERT (s != NULL); rela.r_offset = (h->root.u.def.value + h->root.u.def.section->output_section->vma + h->root.u.def.section->output_offset); rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_COPY); rela.r_addend = 0; bfd_elf64_swap_reloca_out (output_bfd, &rela, ((Elf64_External_Rela *) s->contents + s->reloc_count)); ++s->reloc_count; } /* Mark some specially defined symbols as absolute. */ if (strcmp (h->root.root.string, "_DYNAMIC") == 0 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) sym->st_shndx = SHN_ABS; return true; } /* Finish up the dynamic sections. */ static boolean sparc64_elf_finish_dynamic_sections (output_bfd, info) bfd *output_bfd; struct bfd_link_info *info; { bfd *dynobj; int stt_regidx = -1; asection *sdyn; asection *sgot; dynobj = elf_hash_table (info)->dynobj; sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); if (elf_hash_table (info)->dynamic_sections_created) { asection *splt; Elf64_External_Dyn *dyncon, *dynconend; splt = bfd_get_section_by_name (dynobj, ".plt"); BFD_ASSERT (splt != NULL && sdyn != NULL); dyncon = (Elf64_External_Dyn *) sdyn->contents; dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); for (; dyncon < dynconend; dyncon++) { Elf_Internal_Dyn dyn; const char *name; boolean size; bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); switch (dyn.d_tag) { case DT_PLTGOT: name = ".plt"; size = false; break; case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; case DT_JMPREL: name = ".rela.plt"; size = false; break; case DT_SPARC_REGISTER: if (stt_regidx == -1) { stt_regidx = _bfd_elf_link_lookup_local_dynindx (info, output_bfd, -1); if (stt_regidx == -1) return false; } dyn.d_un.d_val = stt_regidx++; bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); /* fallthrough */ default: name = NULL; size = false; break; } if (name != NULL) { asection *s; s = bfd_get_section_by_name (output_bfd, name); if (s == NULL) dyn.d_un.d_val = 0; else { if (! size) dyn.d_un.d_ptr = s->vma; else { if (s->_cooked_size != 0) dyn.d_un.d_val = s->_cooked_size; else dyn.d_un.d_val = s->_raw_size; } } bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); } } /* Initialize the contents of the .plt section. */ if (splt->_raw_size > 0) { sparc64_elf_build_plt(output_bfd, splt->contents, splt->_raw_size / PLT_ENTRY_SIZE); } elf_section_data (splt->output_section)->this_hdr.sh_entsize = PLT_ENTRY_SIZE; } /* Set the first entry in the global offset table to the address of the dynamic section. */ sgot = bfd_get_section_by_name (dynobj, ".got"); BFD_ASSERT (sgot != NULL); if (sgot->_raw_size > 0) { if (sdyn == NULL) bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents); else bfd_put_64 (output_bfd, sdyn->output_section->vma + sdyn->output_offset, sgot->contents); } elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 8; return true; } /* Functions for dealing with the e_flags field. */ /* Merge backend specific data from an object file to the output object file when linking. */ static boolean sparc64_elf_merge_private_bfd_data (ibfd, obfd) bfd *ibfd; bfd *obfd; { boolean error; flagword new_flags, old_flags; int new_mm, old_mm; 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 */ { error = false; if ((ibfd->flags & DYNAMIC) != 0) { /* We don't want dynamic objects memory ordering and architecture to have any role. That's what dynamic linker should do. */ old_flags &= ~(EF_SPARCV9_MM | EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1); old_flags |= (new_flags & (EF_SPARCV9_MM | EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)); } else { /* Choose the highest architecture requirements. */ old_flags |= (new_flags & (EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)); new_flags |= (old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)); if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)) == (EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)) { error = true; (*_bfd_error_handler) (_("%s: linking UltraSPARC specific with HAL specific code"), bfd_get_filename (ibfd)); } /* Choose the most restrictive memory ordering. */ old_mm = (old_flags & EF_SPARCV9_MM); new_mm = (new_flags & EF_SPARCV9_MM); old_flags &= ~EF_SPARCV9_MM; new_flags &= ~EF_SPARCV9_MM; if (new_mm < old_mm) old_mm = new_mm; old_flags |= old_mm; new_flags |= old_mm; } /* 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_get_filename (ibfd), (long)new_flags, (long)old_flags); } elf_elfheader (obfd)->e_flags = old_flags; if (error) { bfd_set_error (bfd_error_bad_value); return false; } } return true; } /* Print a STT_REGISTER symbol to file FILE. */ static const char * sparc64_elf_print_symbol_all (abfd, filep, symbol) bfd *abfd; PTR filep; asymbol *symbol; { FILE *file = (FILE *) filep; int reg, type; if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info) != STT_REGISTER) return NULL; reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value; type = symbol->flags; fprintf (file, "REG_%c%c%11s%c%c R", "GOLI" [reg / 8], '0' + (reg & 7), "", ((type & BSF_LOCAL) ? (type & BSF_GLOBAL) ? '!' : 'l' : (type & BSF_GLOBAL) ? 'g' : ' '), (type & BSF_WEAK) ? 'w' : ' '); if (symbol->name == NULL || symbol->name [0] == '\0') return "#scratch"; else return symbol->name; } /* Set the right machine number for a SPARC64 ELF file. */ static boolean sparc64_elf_object_p (abfd) bfd *abfd; { unsigned long mach = bfd_mach_sparc_v9; if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) mach = bfd_mach_sparc_v9a; return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach); } /* Relocations in the 64 bit SPARC ELF ABI are more complex than in standard ELF, because R_SPARC_OLO10 has secondary addend in ELF64_R_TYPE_DATA field. This structure is used to redirect the relocation handling routines. */ const struct elf_size_info sparc64_elf_size_info = { sizeof (Elf64_External_Ehdr), sizeof (Elf64_External_Phdr), sizeof (Elf64_External_Shdr), sizeof (Elf64_External_Rel), sizeof (Elf64_External_Rela), sizeof (Elf64_External_Sym), sizeof (Elf64_External_Dyn), sizeof (Elf_External_Note), 4, /* hash-table entry size */ /* internal relocations per external relocations. For link purposes we use just 1 internal per 1 external, for assembly and slurp symbol table we use 2. */ 1, 64, /* arch_size */ 8, /* file_align */ ELFCLASS64, EV_CURRENT, bfd_elf64_write_out_phdrs, bfd_elf64_write_shdrs_and_ehdr, sparc64_elf_write_relocs, bfd_elf64_swap_symbol_out, sparc64_elf_slurp_reloc_table, bfd_elf64_slurp_symbol_table, bfd_elf64_swap_dyn_in, bfd_elf64_swap_dyn_out, NULL, NULL, NULL, NULL }; #define TARGET_BIG_SYM bfd_elf64_sparc_vec #define TARGET_BIG_NAME "elf64-sparc" #define ELF_ARCH bfd_arch_sparc #define ELF_MAXPAGESIZE 0x100000 /* This is the official ABI value. */ #define ELF_MACHINE_CODE EM_SPARCV9 /* This is the value that we used before the ABI was released. */ #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9 #define bfd_elf64_bfd_link_hash_table_create \ sparc64_elf_bfd_link_hash_table_create #define elf_info_to_howto \ sparc64_elf_info_to_howto #define bfd_elf64_get_reloc_upper_bound \ sparc64_elf_get_reloc_upper_bound #define bfd_elf64_get_dynamic_reloc_upper_bound \ sparc64_elf_get_dynamic_reloc_upper_bound #define bfd_elf64_canonicalize_dynamic_reloc \ sparc64_elf_canonicalize_dynamic_reloc #define bfd_elf64_bfd_reloc_type_lookup \ sparc64_elf_reloc_type_lookup #define elf_backend_create_dynamic_sections \ _bfd_elf_create_dynamic_sections #define elf_backend_add_symbol_hook \ sparc64_elf_add_symbol_hook #define elf_backend_get_symbol_type \ sparc64_elf_get_symbol_type #define elf_backend_symbol_processing \ sparc64_elf_symbol_processing #define elf_backend_check_relocs \ sparc64_elf_check_relocs #define elf_backend_adjust_dynamic_symbol \ sparc64_elf_adjust_dynamic_symbol #define elf_backend_size_dynamic_sections \ sparc64_elf_size_dynamic_sections #define elf_backend_relocate_section \ sparc64_elf_relocate_section #define elf_backend_finish_dynamic_symbol \ sparc64_elf_finish_dynamic_symbol #define elf_backend_finish_dynamic_sections \ sparc64_elf_finish_dynamic_sections #define elf_backend_print_symbol_all \ sparc64_elf_print_symbol_all #define elf_backend_output_arch_syms \ sparc64_elf_output_arch_syms #define bfd_elf64_bfd_merge_private_bfd_data \ sparc64_elf_merge_private_bfd_data #define elf_backend_size_info \ sparc64_elf_size_info #define elf_backend_object_p \ sparc64_elf_object_p #define elf_backend_want_got_plt 0 #define elf_backend_plt_readonly 0 #define elf_backend_want_plt_sym 1 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table. */ #define elf_backend_plt_alignment 8 #define elf_backend_got_header_size 8 #define elf_backend_plt_header_size PLT_HEADER_SIZE #include "elf64-target.h"
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