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-rw-r--r--binutils-2.25/bfd/elf32-openrisc.c570
1 files changed, 570 insertions, 0 deletions
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"
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 05:50:24 +0000