--- /dev/null
+/* Morpho Technologies MS1 specific support for 32-bit ELF
+ Copyright 2001, 2002, 2003, 2004, 2005
+ 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"
+#include "elf/ms1.h"
+
+/* Prototypes. */
+static reloc_howto_type * ms1_reloc_type_lookup
+ (bfd *, bfd_reloc_code_real_type);
+
+static void ms1_info_to_howto_rela
+ (bfd *, arelent *, Elf_Internal_Rela *);
+
+static bfd_reloc_status_type ms1_elf_relocate_hi16
+ (bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma);
+
+static bfd_reloc_status_type ms1_final_link_relocate
+ (reloc_howto_type *, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *, bfd_vma);
+
+static bfd_boolean ms1_elf_relocate_section
+ (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
+
+/* Relocation tables. */
+static reloc_howto_type ms1_elf_howto_table [] =
+{
+ /* This reloc does nothing. */
+ HOWTO (R_MS1_NONE, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MS1_NONE", /* name */
+ FALSE, /* partial_inplace */
+ 0 , /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 16 bit absolute relocation. */
+ HOWTO (R_MS1_16, /* type */
+ 0, /* rightshift */
+ 2, /* 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_MS1_16", /* name */
+ FALSE, /* partial_inplace */
+ 0 , /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 32 bit absolute relocation. */
+ HOWTO (R_MS1_32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MS1_32", /* name */
+ FALSE, /* partial_inplace */
+ 0 , /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 32 bit pc-relative relocation. */
+ HOWTO (R_MS1_32_PCREL, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MS1_32_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0 , /* src_mask */
+ 0xffffffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 16 bit pc-relative relocation. */
+ HOWTO (R_MS1_PC16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MS1_PC16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* high 16 bits of symbol value. */
+ HOWTO (R_MS1_HI16, /* type */
+ 0, /* rightshift */
+ 2, /* 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_MS1_HI16", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff0000, /* src_mask */
+ 0xffff0000, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* Low 16 bits of symbol value. */
+ HOWTO (R_MS1_LO16, /* type */
+ 0, /* rightshift */
+ 2, /* 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_MS1_LO16", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+};
+
+/* Map BFD reloc types to MS1 ELF reloc types. */
+
+static reloc_howto_type *
+ms1_reloc_type_lookup
+ (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ /* Note that the ms1_elf_howto_table is indxed by the R_
+ constants. Thus, the order that the howto records appear in the
+ table *must* match the order of the relocation types defined in
+ include/elf/ms1.h. */
+
+ switch (code)
+ {
+ case BFD_RELOC_NONE:
+ return &ms1_elf_howto_table[ (int) R_MS1_NONE];
+ case BFD_RELOC_16:
+ return &ms1_elf_howto_table[ (int) R_MS1_16];
+ case BFD_RELOC_32:
+ return &ms1_elf_howto_table[ (int) R_MS1_32];
+ case BFD_RELOC_32_PCREL:
+ return &ms1_elf_howto_table[ (int) R_MS1_32_PCREL];
+ case BFD_RELOC_16_PCREL:
+ return &ms1_elf_howto_table[ (int) R_MS1_PC16];
+ case BFD_RELOC_HI16:
+ return &ms1_elf_howto_table[ (int) R_MS1_HI16];
+ case BFD_RELOC_LO16:
+ return &ms1_elf_howto_table[ (int) R_MS1_LO16];
+
+ default:
+ /* Pacify gcc -Wall. */
+ return NULL;
+ }
+ return NULL;
+}
+
+bfd_reloc_status_type
+ms1_elf_relocate_hi16
+ (bfd * input_bfd,
+ Elf_Internal_Rela * relhi,
+ bfd_byte * contents,
+ bfd_vma value)
+{
+ bfd_vma insn;
+
+ insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
+
+ value += relhi->r_addend;
+ value >>= 16;
+ insn = ((insn & ~0xFFFF) | value);
+
+ bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
+ return bfd_reloc_ok;
+}
+\f
+/* XXX: The following code is the result of a cut&paste. This unfortunate
+ practice is very widespread in the various target back-end files. */
+
+/* Set the howto pointer for a MS1 ELF reloc. */
+
+static void
+ms1_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);
+ cache_ptr->howto = & ms1_elf_howto_table [r_type];
+}
+
+/* Perform a single relocation. By default we use the standard BFD
+ routines. */
+
+static bfd_reloc_status_type
+ms1_final_link_relocate
+ (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 a MS1 ELF section.
+ 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 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
+ms1_elf_relocate_section
+ (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);
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
+ /* This is a final link. */
+ howto = ms1_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;
+ bfd_boolean warned;
+
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ h, sec, relocation,
+ unresolved_reloc, warned);
+
+ name = h->root.root.string;
+ }
+
+
+ /* Finally, the sole MS1-specific part. */
+ switch (r_type)
+ {
+ case R_MS1_HI16:
+ r = ms1_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
+ break;
+ default:
+ r = ms1_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel, relocation);
+ break;
+ }
+
+
+ if (r != bfd_reloc_ok)
+ {
+ const char * msg = (const char *) 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_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 *
+ms1_elf_gc_mark_hook
+ (asection * sec,
+ struct bfd_link_info * info ATTRIBUTE_UNUSED,
+ Elf_Internal_Rela * rel ATTRIBUTE_UNUSED,
+ struct elf_link_hash_entry * h,
+ Elf_Internal_Sym * sym)
+{
+ if (h != NULL)
+ {
+ switch (h->root.type)
+ {
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ return h->root.u.def.section;
+
+ case bfd_link_hash_common:
+ return h->root.u.c.p->section;
+
+ default:
+ break;
+ }
+ }
+ else
+ {
+ if (!(elf_bad_symtab (sec->owner)
+ && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
+ && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
+ && sym->st_shndx != SHN_COMMON))
+ return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
+ }
+
+ return NULL;
+}
+
+/* Update the got entry reference counts for the section being
+ removed. */
+
+static bfd_boolean
+ms1_elf_gc_sweep_hook
+ (bfd * abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info * info ATTRIBUTE_UNUSED,
+ asection * sec ATTRIBUTE_UNUSED,
+ const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
+{
+ return TRUE;
+}
+
+/* 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
+ms1_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;
+ struct elf_link_hash_entry ** sym_hashes_end;
+ 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);
+ sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
+ if (!elf_bad_symtab (abfd))
+ sym_hashes_end -= symtab_hdr->sh_info;
+
+ 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];
+ }
+
+ return TRUE;
+}
+
+/* Return the MACH for an e_flags value. */
+
+static int
+elf32_ms1_machine (bfd *abfd)
+{
+ switch (elf_elfheader (abfd)->e_flags & EF_MS1_CPU_MASK)
+ {
+ case EF_MS1_CPU_MRISC: return bfd_mach_ms1;
+ case EF_MS1_CPU_MRISC2: return bfd_mach_mrisc2;
+ }
+
+ return bfd_mach_ms1;
+}
+
+static bfd_boolean
+ms1_elf_object_p (bfd * abfd)
+{
+ bfd_default_set_arch_mach (abfd, bfd_arch_ms1, elf32_ms1_machine (abfd));
+
+ return TRUE;
+}
+
+/* Function to set the ELF flag bits. */
+
+static bfd_boolean
+ms1_elf_set_private_flags (bfd * abfd,
+ flagword flags)
+{
+ elf_elfheader (abfd)->e_flags = flags;
+ elf_flags_init (abfd) = TRUE;
+ return TRUE;
+}
+
+static bfd_boolean
+ms1_elf_copy_private_bfd_data (bfd * ibfd, bfd * obfd)
+{
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return TRUE;
+
+ BFD_ASSERT (!elf_flags_init (obfd)
+ || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
+
+ elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
+ elf_flags_init (obfd) = TRUE;
+ return TRUE;
+}
+
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
+
+static bfd_boolean
+ms1_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
+{
+ flagword old_flags, new_flags;
+ bfd_boolean error = FALSE;
+ static bfd * last_ibfd = 0;
+
+ /* Check if we have the same endianess. */
+ if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
+ return FALSE;
+
+ /* If they're not both ms1, then merging is meaningless, so just
+ don't do it. */
+ if (strcmp (ibfd->arch_info->arch_name, "ms1") != 0)
+ return TRUE;
+ if (strcmp (obfd->arch_info->arch_name, "ms1") != 0)
+ return TRUE;
+
+ new_flags = elf_elfheader (ibfd)->e_flags;
+ old_flags = elf_elfheader (obfd)->e_flags;
+
+#ifdef DEBUG
+ _bfd_error_handler ("%B: old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s",
+ ibfd, old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no");
+#endif
+
+ elf_flags_init (obfd) = TRUE;
+
+ if ((new_flags & EF_MS1_CPU_MASK) == EF_MS1_CPU_MRISC2)
+ {
+ elf_elfheader (obfd)->e_flags = new_flags;
+ last_ibfd = ibfd;
+ obfd->arch_info = ibfd->arch_info;
+ }
+
+ return !error;
+}
+
+static bfd_boolean
+ms1_elf_print_private_bfd_data (bfd * abfd, void * ptr)
+{
+ FILE * file = (FILE *) ptr;
+ flagword flags;
+
+ BFD_ASSERT (abfd != NULL && ptr != NULL);
+
+ /* Print normal ELF private data. */
+ _bfd_elf_print_private_bfd_data (abfd, ptr);
+
+ flags = elf_elfheader (abfd)->e_flags;
+ fprintf (file, _("private flags = 0x%lx:"), (long)flags);
+
+ switch (flags & EF_MS1_CPU_MASK)
+ {
+ default:
+ case EF_MS1_CPU_MRISC: fprintf (file, " ms1-16-002"); break;
+ case EF_MS1_CPU_MRISC2: fprintf (file, " ms1-16-003"); break;
+ }
+
+ fputc ('\n', file);
+
+ return TRUE;
+}
+
+\f
+#define TARGET_BIG_SYM bfd_elf32_ms1_vec
+#define TARGET_BIG_NAME "elf32-ms1"
+
+#define ELF_ARCH bfd_arch_ms1
+#define ELF_MACHINE_CODE EM_MS1
+#define ELF_MAXPAGESIZE 1 /* No pages on the MS1. */
+
+#define elf_info_to_howto_rel NULL
+#define elf_info_to_howto ms1_info_to_howto_rela
+
+#define elf_backend_relocate_section ms1_elf_relocate_section
+
+#define bfd_elf32_bfd_reloc_type_lookup ms1_reloc_type_lookup
+
+#define elf_backend_gc_mark_hook ms1_elf_gc_mark_hook
+#define elf_backend_gc_sweep_hook ms1_elf_gc_sweep_hook
+#define elf_backend_check_relocs ms1_elf_check_relocs
+#define elf_backend_object_p ms1_elf_object_p
+#define elf_backend_rela_normal 1
+
+#define elf_backend_can_gc_sections 1
+
+#define bfd_elf32_bfd_set_private_flags ms1_elf_set_private_flags
+#define bfd_elf32_bfd_copy_private_bfd_data ms1_elf_copy_private_bfd_data
+#define bfd_elf32_bfd_merge_private_bfd_data ms1_elf_merge_private_bfd_data
+#define bfd_elf32_bfd_print_private_bfd_data ms1_elf_print_private_bfd_data
+
+#include "elf32-target.h"
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