static void elf32_i860_info_to_howto_rela
PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
+static bfd_reloc_status_type elf32_i860_relocate_splitn
+ PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
+
+#if 0
+static bfd_reloc_status_type elf32_i860_relocate_pc16
+ PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
+#endif
+
+static bfd_reloc_status_type elf32_i860_relocate_highadj
+ PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
+
+static boolean elf32_i860_relocate_section
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
+
+static bfd_reloc_status_type i860_final_link_relocate
+ PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *, bfd_vma));
+
+
/* This howto table is preliminary. */
static reloc_howto_type elf32_i860_howto_table [] =
/* A 26-bit PC-relative relocation. */
HOWTO (R_860_PC26, /* type */
- 0, /* rightshift */
+ 2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
true, /* pc_relative */
/* A 16-bit PC-relative relocation. */
HOWTO (R_860_PC16, /* type */
- 0, /* rightshift */
+ 2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
true, /* pc_relative */
true), /* pcrel_offset */
HOWTO (R_860_HIGH, /* type */
- 0, /* rightshift */
+ 16, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
}
+\f
+/* Specialized relocation handler for R_860_SPLITn. These relocations
+ involves a 16-bit field that is split into two contiguous parts. */
+static bfd_reloc_status_type
+elf32_i860_relocate_splitn (input_bfd, rello, contents, value)
+ bfd *input_bfd;
+ Elf_Internal_Rela *rello;
+ bfd_byte *contents;
+ bfd_vma value;
+{
+ bfd_vma insn, t;
+ reloc_howto_type *howto;
+ howto = lookup_howto (ELF32_R_TYPE (rello->r_info));
+ insn = bfd_get_32 (input_bfd, contents + rello->r_offset);
+
+ /* Remove encode bits and intervening bits. Then concatenate the
+ two fields into one 16-bit quantity. */
+ t = (insn & howto->src_mask);
+ t = ((t >> 5) & 0xf8) | (t & 0x7ff);
+
+ /* Relocate. */
+ value += (rello->r_addend + t);
+
+ /* Separate the fields and re-insert. */
+ value = (((value & 0xf8) << 5) | (value & 0x7ff)) & howto->dst_mask;
+ insn = (insn & ~howto->dst_mask) | value;
+
+ bfd_put_32 (input_bfd, insn, contents + rello->r_offset);
+ return bfd_reloc_ok;
+}
+
+
+#if 0
+/* Specialized relocation handler for R_860_PC16. This relocation
+ involves a 16-bit, PC-relative field that is split into two contiguous
+ parts. */
+static bfd_reloc_status_type
+elf32_i860_relocate_pc16 (input_bfd, rello, contents, value)
+ bfd *input_bfd;
+ Elf_Internal_Rela *rello;
+ bfd_byte *contents;
+ bfd_vma value;
+{
+}
+#endif
+
+
+/* Specialized relocation handler for R_860_HIGHADJ. */
+static bfd_reloc_status_type
+elf32_i860_relocate_highadj (input_bfd, rel, contents, value)
+ bfd *input_bfd;
+ Elf_Internal_Rela *rel;
+ bfd_byte *contents;
+ bfd_vma value;
+{
+ bfd_vma insn;
+
+ insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
+
+ value += ((rel->r_addend & 0x8000) << 1);
+ value += rel->r_addend;
+ value = ((value >> 16) & 0xffff);
+ value = (value + (insn & 0xffff)) & 0xffff;
+
+ insn = (insn & 0xffff0000) | value;
+
+ bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
+ return bfd_reloc_ok;
+}
+
+
+/* Perform a single relocation. By default we use the standard BFD
+ routines. However, we handle some specially. */
+static bfd_reloc_status_type
+i860_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation)
+ reloc_howto_type * howto;
+ bfd * input_bfd;
+ asection * input_section;
+ bfd_byte * contents;
+ Elf_Internal_Rela * rel;
+ bfd_vma relocation;
+{
+ return _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset, relocation,
+ rel->r_addend);
+}
+
+
+/* Relocate an i860 ELF section.
+ This is boiler-plate code copied from fr30.
+ There is some attempt to make this function usable for many architectures,
+ both USE_REL and USE_RELA ['twould be nice if such a critter existed],
+ if only to serve as a learning tool.
+
+ 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 relocateable
+ output file) adjusting the reloc addend as necessary.
+
+ This function does not have to worry about setting the reloc
+ address or the reloc symbol index.
+
+ LOCAL_SYMS is a pointer to the swapped in local symbols.
+
+ LOCAL_SECTIONS is an array giving the section in the input file
+ corresponding to the st_shndx field of each local symbol.
+
+ The global hash table entry for the global symbols can be found
+ via elf_sym_hashes (input_bfd).
+
+ When generating relocateable output, this function must handle
+ STB_LOCAL/STT_SECTION symbols specially. The output symbol is
+ going to be the section symbol corresponding to the output
+ section, which means that the addend must be adjusted
+ accordingly. */
+static boolean
+elf32_i860_relocate_section (output_bfd, info, input_bfd, input_section,
+ contents, relocs, local_syms, local_sections)
+ bfd * output_bfd ATTRIBUTE_UNUSED;
+ 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);
+
+#if 0
+ if ( r_type == R_860_GNU_VTINHERIT
+ || r_type == R_860_GNU_VTENTRY)
+ continue;
+#endif
+
+ r_symndx = ELF32_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. */
+ howto = lookup_howto (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 = (sec->output_section->vma
+ + sec->output_offset
+ + sym->st_value);
+
+ 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
+ {
+ 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;
+
+ name = h->root.root.string;
+
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ sec = h->root.u.def.section;
+ 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->callbacks->undefined_symbol)
+ (info, h->root.root.string, input_bfd,
+ input_section, rel->r_offset, true)))
+ return false;
+ relocation = 0;
+ }
+ }
+
+ switch (r_type)
+ {
+ default:
+ r = i860_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel, relocation);
+ break;
+
+ case R_860_HIGHADJ:
+ r = elf32_i860_relocate_highadj (input_bfd, rel, contents,
+ relocation);
+ break;
+
+#if 0
+ case R_860_PC16:
+ r = elf32_i860_relocate_pc16 (input_bfd, rel, contents,
+ relocation);
+ break;
+#endif
+
+ case R_860_SPLIT0:
+ case R_860_SPLIT1:
+ case R_860_SPLIT2:
+ r = elf32_i860_relocate_splitn (input_bfd, rel, contents,
+ relocation);
+ break;
+
+ /* We do not yet handle GOT/PLT/Dynamic relocations. */
+ case R_860_COPY:
+ case R_860_GLOB_DAT:
+ case R_860_JUMP_SLOT:
+ case R_860_RELATIVE:
+ case R_860_PLT26:
+ case R_860_LOGOT0:
+ case R_860_SPGOT0:
+ case R_860_LOGOT1:
+ case R_860_SPGOT1:
+ case R_860_LOGOTOFF0:
+ case R_860_SPGOTOFF0:
+ case R_860_LOGOTOFF1:
+ case R_860_SPGOTOFF1:
+ case R_860_LOGOTOFF2:
+ case R_860_LOGOTOFF3:
+ case R_860_LOPC:
+ case R_860_HAGOT:
+ case R_860_HAGOTOFF:
+ case R_860_HAPC:
+ case R_860_HIGOT:
+ case R_860_HIGOTOFF:
+ r = bfd_reloc_notsupported;
+ break;
+ }
+
+ if (r != bfd_reloc_ok)
+ {
+ const char * msg = (const char *) NULL;
+
+ switch (r)
+ {
+ case bfd_reloc_overflow:
+ r = info->callbacks->reloc_overflow
+ (info, 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;
+}
+
+
+\f
#define TARGET_BIG_SYM bfd_elf32_i860_vec
#define TARGET_BIG_NAME "elf32-i860"
#define TARGET_LITTLE_SYM bfd_elf32_i860_little_vec
#define ELF_MACHINE_CODE EM_860
#define ELF_MAXPAGESIZE 4096
-
+#define elf_info_to_howto_rel NULL
#define elf_info_to_howto elf32_i860_info_to_howto_rela
+#define elf_backend_relocate_section elf32_i860_relocate_section
#define bfd_elf32_bfd_reloc_type_lookup elf32_i860_reloc_type_lookup
#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / commitdiff
