From 54f1b3cf509cd889905287cb8ce6c5ae33911a21 Mon Sep 17 00:00:00 2001 From: Andrew Hsieh Date: Fri, 13 Jun 2014 12:38:00 -0700 Subject: Add upstream binutils-2.25 snapshot 4/4 2014 For MIPS -mmsa support Change-Id: I08c4f002fa7b33dec85ed75956e6ab551bb03c96 --- binutils-2.25/bfd/elf32-openrisc.c | 570 +++++++++++++++++++++++++++++++++++++ 1 file changed, 570 insertions(+) create mode 100644 binutils-2.25/bfd/elf32-openrisc.c (limited to 'binutils-2.25/bfd/elf32-openrisc.c') diff --git a/binutils-2.25/bfd/elf32-openrisc.c b/binutils-2.25/bfd/elf32-openrisc.c new file mode 100644 index 00000000..7abc938b --- /dev/null +++ b/binutils-2.25/bfd/elf32-openrisc.c @@ -0,0 +1,570 @@ +/* OpenRISC-specific support for 32-bit ELF. + Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2010, 2012 + Free Software Foundation, Inc. + Contributed by Johan Rydberg, jrydberg@opencores.org + + This file is part of BFD, the Binary File Descriptor library. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#include "sysdep.h" +#include "bfd.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/openrisc.h" +#include "libiberty.h" + +static reloc_howto_type openrisc_elf_howto_table[] = +{ + /* This reloc does nothing. */ + HOWTO (R_OPENRISC_NONE, /* 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_OPENRISC_NONE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A PC relative 26 bit relocation, right shifted by 2. */ + HOWTO (R_OPENRISC_INSN_REL_26, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OPENRISC_INSN_REL_26", /* name */ + FALSE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x03ffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A absolute 26 bit relocation, right shifted by 2. */ + HOWTO (R_OPENRISC_INSN_ABS_26, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OPENRISC_INSN_ABS_26", /* name */ + FALSE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x03ffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OPENRISC_LO_16_IN_INSN, /* 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_OPENRISC_LO_16_IN_INSN", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_OPENRISC_HI_16_IN_INSN, /* type */ + 16, /* 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_OPENRISC_HI_16_IN_INSN", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An 8 bit absolute relocation. */ + HOWTO (R_OPENRISC_8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_OPENRISC_8", /* name */ + TRUE, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x00ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit absolute relocation. */ + HOWTO (R_OPENRISC_16, /* 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_OPENRISC_16", /* name */ + TRUE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 32 bit absolute relocation. */ + HOWTO (R_OPENRISC_32, /* 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_OPENRISC_32", /* name */ + TRUE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy. */ + HOWTO (R_OPENRISC_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_OPENRISC_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_OPENRISC_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + _bfd_elf_rel_vtable_reloc_fn, /* special_function */ + "R_OPENRISC_GNU_VTENTRY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ +}; + +/* Map BFD reloc types to OpenRISC ELF reloc types. */ + +struct openrisc_reloc_map +{ + bfd_reloc_code_real_type bfd_reloc_val; + unsigned int openrisc_reloc_val; +}; + +static const struct openrisc_reloc_map openrisc_reloc_map[] = +{ + { BFD_RELOC_NONE, R_OPENRISC_NONE }, + { BFD_RELOC_32, R_OPENRISC_32 }, + { BFD_RELOC_16, R_OPENRISC_16 }, + { BFD_RELOC_8, R_OPENRISC_8 }, + { BFD_RELOC_OPENRISC_REL_26, R_OPENRISC_INSN_REL_26 }, + { BFD_RELOC_OPENRISC_ABS_26, R_OPENRISC_INSN_ABS_26 }, + { BFD_RELOC_HI16, R_OPENRISC_HI_16_IN_INSN }, + { BFD_RELOC_LO16, R_OPENRISC_LO_16_IN_INSN }, + { BFD_RELOC_VTABLE_INHERIT, R_OPENRISC_GNU_VTINHERIT }, + { BFD_RELOC_VTABLE_ENTRY, R_OPENRISC_GNU_VTENTRY } +}; + +static reloc_howto_type * +openrisc_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + unsigned int i; + + for (i = ARRAY_SIZE (openrisc_reloc_map); --i;) + if (openrisc_reloc_map[i].bfd_reloc_val == code) + return & openrisc_elf_howto_table[openrisc_reloc_map[i]. + openrisc_reloc_val]; + + return NULL; +} + +static reloc_howto_type * +openrisc_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < (sizeof (openrisc_elf_howto_table) + / sizeof (openrisc_elf_howto_table[0])); + i++) + if (openrisc_elf_howto_table[i].name != NULL + && strcasecmp (openrisc_elf_howto_table[i].name, r_name) == 0) + return &openrisc_elf_howto_table[i]; + + return NULL; +} + +/* Set the howto pointer for an OpenRISC ELF reloc. */ + +static void +openrisc_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, + arelent * cache_ptr, + Elf_Internal_Rela * dst) +{ + unsigned int r_type; + + r_type = ELF32_R_TYPE (dst->r_info); + BFD_ASSERT (r_type < (unsigned int) R_OPENRISC_max); + cache_ptr->howto = & openrisc_elf_howto_table[r_type]; +} + +/* Perform a single relocation. By default we use the standard BFD + routines, but a few relocs, we have to do them ourselves. */ + +static bfd_reloc_status_type +openrisc_final_link_relocate (reloc_howto_type *howto, + bfd *input_bfd, + asection *input_section, + bfd_byte *contents, + Elf_Internal_Rela *rel, + bfd_vma relocation) +{ + bfd_reloc_status_type r = bfd_reloc_ok; + + switch (howto->type) + { + case R_OPENRISC_LO_16_IN_INSN: + relocation &= 0xffff; + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, rel->r_addend); + break; + + default: + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, rel->r_addend); + } + + return r; +} + +/* Relocate an OpenRISC ELF section. + + The RELOCATE_SECTION function is called by the new ELF backend linker + to handle the relocations for a section. + + The relocs are always passed as Rela structures; if the section + actually uses Rel structures, the r_addend field will always be + zero. + + This function is responsible for adjusting the section contents as + necessary, and (if using Rela relocs and generating a relocatable + output file) adjusting the reloc addend as necessary. + + This function does not have to worry about setting the reloc + address or the reloc symbol index. + + LOCAL_SYMS is a pointer to the swapped in local symbols. + + LOCAL_SECTIONS is an array giving the section in the input file + corresponding to the st_shndx field of each local symbol. + + The global hash table entry for the global symbols can be found + via elf_sym_hashes (input_bfd). + + When generating relocatable output, this function must handle + STB_LOCAL/STT_SECTION symbols specially. The output symbol is + going to be the section symbol corresponding to the output + section, which means that the addend must be adjusted + accordingly. */ + +static bfd_boolean +openrisc_elf_relocate_section (bfd *output_bfd, + struct bfd_link_info *info, + bfd *input_bfd, + asection *input_section, + bfd_byte *contents, + Elf_Internal_Rela *relocs, + Elf_Internal_Sym *local_syms, + asection **local_sections) +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + relend = relocs + input_section->reloc_count; + + for (rel = relocs; rel < relend; rel++) + { + reloc_howto_type *howto; + unsigned long r_symndx; + Elf_Internal_Sym *sym; + asection *sec; + struct elf_link_hash_entry *h; + bfd_vma relocation; + bfd_reloc_status_type r; + const char *name = NULL; + int r_type; + + r_type = ELF32_R_TYPE (rel->r_info); + r_symndx = ELF32_R_SYM (rel->r_info); + + if (r_type == R_OPENRISC_GNU_VTINHERIT + || r_type == R_OPENRISC_GNU_VTENTRY) + continue; + + if ((unsigned int) r_type > + (sizeof openrisc_elf_howto_table / sizeof (reloc_howto_type))) + abort (); + + howto = openrisc_elf_howto_table + ELF32_R_TYPE (rel->r_info); + h = NULL; + sym = NULL; + sec = NULL; + + if (r_symndx < symtab_hdr->sh_info) + { + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); + + name = bfd_elf_string_from_elf_section + (input_bfd, symtab_hdr->sh_link, sym->st_name); + name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; + } + else + { + bfd_boolean unresolved_reloc, warned; + + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned); + } + + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, howto, 0, contents); + + if (info->relocatable) + continue; + + r = openrisc_final_link_relocate (howto, input_bfd, input_section, + contents, rel, relocation); + + if (r != bfd_reloc_ok) + { + const char *msg = NULL; + + switch (r) + { + case bfd_reloc_overflow: + r = info->callbacks->reloc_overflow + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, rel->r_offset); + break; + + case bfd_reloc_undefined: + r = info->callbacks->undefined_symbol + (info, name, input_bfd, input_section, rel->r_offset, TRUE); + break; + + case bfd_reloc_outofrange: + msg = _("internal error: out of range error"); + break; + + case bfd_reloc_notsupported: + msg = _("internal error: unsupported relocation error"); + break; + + case bfd_reloc_dangerous: + msg = _("internal error: dangerous relocation"); + break; + + default: + msg = _("internal error: unknown error"); + break; + } + + if (msg) + r = info->callbacks->warning + (info, msg, name, input_bfd, input_section, rel->r_offset); + + if (!r) + return FALSE; + } + } + + return TRUE; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +openrisc_elf_gc_mark_hook (asection *sec, + struct bfd_link_info *info, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + if (h != NULL) + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_OPENRISC_GNU_VTINHERIT: + case R_OPENRISC_GNU_VTENTRY: + return NULL; + } + + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); +} + +/* Look through the relocs for a section during the first phase. + Since we don't do .gots or .plts, we just need to consider the + virtual table relocs for gc. */ + +static bfd_boolean +openrisc_elf_check_relocs (bfd *abfd, + struct bfd_link_info *info, + asection *sec, + const Elf_Internal_Rela *relocs) +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + + if (info->relocatable) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + struct elf_link_hash_entry *h; + unsigned long r_symndx; + + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + /* PR15323, ref flags aren't set for references in the same + object. */ + h->root.non_ir_ref = 1; + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_OPENRISC_GNU_VTINHERIT: + if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) + return FALSE; + break; + + /* This relocation describes which C++ vtable entries are actually + used. Record for later use during GC. */ + case R_OPENRISC_GNU_VTENTRY: + BFD_ASSERT (h != NULL); + if (h != NULL + && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; + } + } + + return TRUE; +} + +/* Set the right machine number. */ + +static bfd_boolean +openrisc_elf_object_p (bfd *abfd) +{ + bfd_default_set_arch_mach (abfd, bfd_arch_openrisc, 0); + return TRUE; +} + +/* Store the machine number in the flags field. */ + +static void +openrisc_elf_final_write_processing (bfd *abfd, + bfd_boolean linker ATTRIBUTE_UNUSED) +{ + unsigned long val; + + switch (bfd_get_mach (abfd)) + { + default: + val = 0; + break; + } + + elf_elfheader (abfd)->e_flags &= ~0xf; + elf_elfheader (abfd)->e_flags |= val; +} + + +#define ELF_ARCH bfd_arch_openrisc +#define ELF_MACHINE_CODE EM_OPENRISC +#define ELF_MACHINE_ALT1 EM_OPENRISC_OLD +#define ELF_MAXPAGESIZE 0x1000 + +#define TARGET_BIG_SYM bfd_elf32_openrisc_vec +#define TARGET_BIG_NAME "elf32-openrisc" + +#define elf_info_to_howto_rel NULL +#define elf_info_to_howto openrisc_info_to_howto_rela +#define elf_backend_relocate_section openrisc_elf_relocate_section +#define elf_backend_gc_mark_hook openrisc_elf_gc_mark_hook +#define elf_backend_check_relocs openrisc_elf_check_relocs + +#define elf_backend_can_gc_sections 1 +#define elf_backend_rela_normal 1 + +#define bfd_elf32_bfd_reloc_type_lookup openrisc_reloc_type_lookup +#define bfd_elf32_bfd_reloc_name_lookup openrisc_reloc_name_lookup + +#define elf_backend_object_p openrisc_elf_object_p +#define elf_backend_final_write_processing openrisc_elf_final_write_processing + +#include "elf32-target.h" -- cgit v1.2.3