diff options
author | Bernd Schmidt <bernds@codesourcery.com> | 2008-07-16 15:27:05 +0000 |
---|---|---|
committer | Bernd Schmidt <bernds@codesourcery.com> | 2008-07-16 15:27:05 +0000 |
commit | c96a857020fd6e0cb9c5ad1ca10280deecfea52d (patch) | |
tree | 8582a217fd35bffb11adff0cf613df10be932abb /bfd | |
parent | 86be91b866e00cd24709f0871a4b8571eb3154da (diff) | |
download | gdb-c96a857020fd6e0cb9c5ad1ca10280deecfea52d.zip gdb-c96a857020fd6e0cb9c5ad1ca10280deecfea52d.tar.gz gdb-c96a857020fd6e0cb9c5ad1ca10280deecfea52d.tar.bz2 |
* elf32-bfin.c (bfin_check_relocs, bfin_relocate_section,
bfin_final_link_relocate, bfin_gc_mark_hook, bfin_gc_sweep_hook,
ELF_DYNAMIC_INTERPRETER, DEFAULT_STACK_SIZE,
struct _bfinfdpic_dynamic_got_info): Moved around to keep FD-PIC code
separate from non-FD-PIC.
Diffstat (limited to 'bfd')
-rw-r--r-- | bfd/ChangeLog | 8 | ||||
-rw-r--r-- | bfd/elf32-bfin.c | 1234 |
2 files changed, 624 insertions, 618 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 443786b..bcb636e 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,11 @@ +2008-07-16 Bernd Schmidt <bernd.schmidt@analog.com> + + * elf32-bfin.c (bfin_check_relocs, bfin_relocate_section, + bfin_final_link_relocate, bfin_gc_mark_hook, bfin_gc_sweep_hook, + ELF_DYNAMIC_INTERPRETER, DEFAULT_STACK_SIZE, + struct _bfinfdpic_dynamic_got_info): Moved around to keep FD-PIC code + separate from non-FD-PIC. + 2008-07-14 DJ Delorie <dj@redhat.com> * elf-m10300.c (mn10300_elf_final_link_relocate): Correct overflow diff --git a/bfd/elf32-bfin.c b/bfd/elf32-bfin.c index b899b6e..a5c2400 100644 --- a/bfd/elf32-bfin.c +++ b/bfd/elf32-bfin.c @@ -1131,7 +1131,592 @@ bfin_is_local_label_name ( return _bfd_elf_is_local_label_name (abfd, label); } + +/* Look through the relocs for a section during the first phase, and + allocate space in the global offset table or procedure linkage + table. */ + +static bfd_boolean +bfin_check_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_signed_vma *local_got_refcounts; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + asection *sgot; + asection *srelgot; + asection *sreloc; + if (info->relocatable) + return TRUE; + + dynobj = elf_hash_table (info)->dynobj; + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + local_got_refcounts = elf_local_got_refcounts (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 = 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]; + + switch (ELF32_R_TYPE (rel->r_info)) + { + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_BFIN_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_BFIN_GNU_VTENTRY: + BFD_ASSERT (h != NULL); + if (h != NULL + && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; + + case R_got: + if (h != NULL + && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) + break; + /* Fall through. */ + + 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) + { + flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS + | SEC_IN_MEMORY | SEC_LINKER_CREATED + | SEC_READONLY); + srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", + flags); + if (srelgot == NULL + || !bfd_set_section_alignment (dynobj, srelgot, 2)) + return FALSE; + } + } + + if (h != NULL) + { + if (h->got.refcount == 0) + { + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1 && !h->forced_local) + { + if (!bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + /* Allocate space in the .got section. */ + sgot->size += 4; + /* Allocate relocation space. */ + srelgot->size += sizeof (Elf32_External_Rela); + } + h->got.refcount++; + } + else + { + /* This is a global offset table entry for a local symbol. */ + if (local_got_refcounts == NULL) + { + bfd_size_type size; + + size = symtab_hdr->sh_info; + size *= sizeof (bfd_signed_vma); + local_got_refcounts = ((bfd_signed_vma *) + bfd_zalloc (abfd, size)); + if (local_got_refcounts == NULL) + return FALSE; + elf_local_got_refcounts (abfd) = local_got_refcounts; + } + if (local_got_refcounts[r_symndx] == 0) + { + sgot->size += 4; + if (info->shared) + { + /* If we are generating a shared object, we need to + output a R_68K_RELATIVE reloc so that the dynamic + linker can adjust this GOT entry. */ + srelgot->size += sizeof (Elf32_External_Rela); + } + } + local_got_refcounts[r_symndx]++; + } + break; + + default: + break; + } + } + + return TRUE; +} + +static enum elf_reloc_type_class +elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela) +{ + switch ((int) ELF32_R_TYPE (rela->r_info)) + { + default: + return reloc_class_normal; + } +} + +static bfd_reloc_status_type +bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto, + bfd *input_bfd, asection *input_section, + bfd_byte *contents, bfd_vma address, + bfd_vma value, bfd_vma addend) +{ + int r_type = ELF32_R_TYPE (rel->r_info); + + if (r_type == R_pcrel24 || r_type == R_pcrel24_jump_l) + { + bfd_reloc_status_type r = bfd_reloc_ok; + bfd_vma x; + + if (address > bfd_get_section_limit (input_bfd, input_section)) + return bfd_reloc_outofrange; + + value += addend; + + /* Perform usual pc-relative correction. */ + value -= input_section->output_section->vma + input_section->output_offset; + value -= address; + + /* We are getting reloc_entry->address 2 byte off from + the start of instruction. Assuming absolute postion + of the reloc data. But, following code had been written assuming + reloc address is starting at begining of instruction. + To compensate that I have increased the value of + relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ + + value += 2; + address -= 2; + + if ((value & 0xFF000000) != 0 + && (value & 0xFF000000) != 0xFF000000) + r = bfd_reloc_overflow; + + value >>= 1; + + x = bfd_get_16 (input_bfd, contents + address); + x = (x & 0xff00) | ((value >> 16) & 0xff); + bfd_put_16 (input_bfd, x, contents + address); + + x = bfd_get_16 (input_bfd, contents + address + 2); + x = value & 0xFFFF; + bfd_put_16 (input_bfd, x, contents + address + 2); + return r; + } + + return _bfd_final_link_relocate (howto, input_bfd, input_section, contents, + rel->r_offset, value, addend); + +} + +static bfd_boolean +bfin_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) +{ + bfd *dynobj; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + bfd_vma *local_got_offsets; + asection *sgot; + asection *sreloc; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + int i = 0; + + 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); + + sgot = NULL; + sreloc = NULL; + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++, i++) + { + int r_type; + reloc_howto_type *howto; + unsigned long r_symndx; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + asection *sec; + bfd_vma relocation = 0; + bfd_boolean unresolved_reloc; + bfd_reloc_status_type r; + bfd_vma address; + + r_type = ELF32_R_TYPE (rel->r_info); + if (r_type < 0 || r_type >= 243) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + if (r_type == R_BFIN_GNU_VTENTRY + || r_type == R_BFIN_GNU_VTINHERIT) + continue; + + howto = bfin_reloc_type_lookup (input_bfd, r_type); + if (howto == NULL) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + r_symndx = ELF32_R_SYM (rel->r_info); + + h = NULL; + sym = NULL; + sec = NULL; + unresolved_reloc = FALSE; + + 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); + } + else + { + 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); + } + + if (sec != NULL && elf_discarded_section (sec)) + { + /* For relocs against symbols from removed linkonce sections, + or sections discarded by a linker script, we just want the + section contents zeroed. Avoid any special processing. */ + _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); + rel->r_info = 0; + rel->r_addend = 0; + continue; + } + + if (info->relocatable) + continue; + + address = rel->r_offset; + + /* Then, process normally. */ + switch (r_type) + { + case R_BFIN_GNU_VTINHERIT: + case R_BFIN_GNU_VTENTRY: + return bfd_reloc_ok; + + case R_got: + /* Relocation is to the address of the entry for this symbol + in the global offset table. */ + if (h != NULL + && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) + goto do_default; + /* Fall through. */ + /* Relocation is the offset of the entry for this symbol in + the global offset table. */ + + { + bfd_vma off; + + if (dynobj == NULL) + { + /* Create the .got section. */ + elf_hash_table (info)->dynobj = dynobj = output_bfd; + 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 (h != NULL) + { + bfd_boolean dyn; + + off = h->got.offset; + BFD_ASSERT (off != (bfd_vma) - 1); + dyn = elf_hash_table (info)->dynamic_sections_created; + + if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) + || (info->shared + && (info->symbolic + || h->dynindx == -1 + || h->forced_local) + && h->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 4, 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_32 (output_bfd, relocation, + sgot->contents + off); + h->got.offset |= 1; + } + } + else + unresolved_reloc = FALSE; + } + else + { + 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 4. We use + the least significant bit to record whether we have + already generated the necessary reloc. */ + if ((off & 1) != 0) + off &= ~1; + else + { + bfd_put_32 (output_bfd, relocation, sgot->contents + off); + + if (info->shared) + { + asection *s; + Elf_Internal_Rela outrel; + bfd_byte *loc; + + s = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (s != NULL); + + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + off); + outrel.r_info = + ELF32_R_INFO (0, R_pcrel24); + outrel.r_addend = relocation; + loc = s->contents; + loc += + s->reloc_count++ * sizeof (Elf32_External_Rela); + bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); + } + + local_got_offsets[r_symndx] |= 1; + } + } + + relocation = sgot->output_offset + off; + rel->r_addend = 0; + /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */ + relocation /= 4; + } + goto do_default; + + default: + do_default: + r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, + contents, address, + relocation, rel->r_addend); + + break; + } + + /* Dynamic relocs are not propagated for SEC_DEBUGGING sections + because such sections are not SEC_ALLOC and thus ld.so will + not process them. */ + if (unresolved_reloc + && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)) + { + (*_bfd_error_handler) + (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), + input_bfd, + input_section, (long) rel->r_offset, h->root.root.string); + return FALSE; + } + + if (r != bfd_reloc_ok) + { + const char *name; + + if (h != NULL) + 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 (r == bfd_reloc_overflow) + { + if (!(info->callbacks->reloc_overflow + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) + return FALSE; + } + else + { + (*_bfd_error_handler) + (_("%B(%A+0x%lx): reloc against `%s': error %d"), + input_bfd, input_section, + (long) rel->r_offset, name, (int) r); + return FALSE; + } + } + } + + return TRUE; +} + +static asection * +bfin_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_BFIN_GNU_VTINHERIT: + case R_BFIN_GNU_VTENTRY: + return NULL; + } + + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); +} + +/* Update the got entry reference counts for the section being removed. */ + +static bfd_boolean +bfin_gc_sweep_hook (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; + bfd_signed_vma *local_got_refcounts; + const Elf_Internal_Rela *rel, *relend; + bfd *dynobj; + asection *sgot; + asection *srelgot; + + dynobj = elf_hash_table (info)->dynobj; + if (dynobj == NULL) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + local_got_refcounts = elf_local_got_refcounts (abfd); + + sgot = bfd_get_section_by_name (dynobj, ".got"); + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx; + struct elf_link_hash_entry *h; + + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_got: + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + if (h->got.refcount > 0) + { + --h->got.refcount; + if (h->got.refcount == 0) + { + /* We don't need the .got entry any more. */ + sgot->size -= 4; + srelgot->size -= sizeof (Elf32_External_Rela); + } + } + } + else if (local_got_refcounts != NULL) + { + if (local_got_refcounts[r_symndx] > 0) + { + --local_got_refcounts[r_symndx]; + if (local_got_refcounts[r_symndx] == 0) + { + /* We don't need the .got entry any more. */ + sgot->size -= 4; + if (info->shared) + srelgot->size -= sizeof (Elf32_External_Rela); + } + } + } + break; + default: + break; + } + } + return TRUE; +} + extern const bfd_target bfd_elf32_bfinfdpic_vec; #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec) @@ -1183,6 +1768,37 @@ struct bfinfdpic_elf_link_hash_table #define bfinfdpic_plt_initial_offset(info) \ (bfinfdpic_hash_table (info)->plt0) +/* The name of the dynamic interpreter. This is put in the .interp + section. */ + +#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" + +#define DEFAULT_STACK_SIZE 0x20000 + +/* This structure is used to collect the number of entries present in + each addressable range of the got. */ +struct _bfinfdpic_dynamic_got_info +{ + /* Several bits of information about the current link. */ + struct bfd_link_info *info; + /* Total size needed for GOT entries within the 18- or 32-bit + ranges. */ + bfd_vma got17m4, gothilo; + /* Total size needed for function descriptor entries within the 18- + or 32-bit ranges. */ + bfd_vma fd17m4, fdhilo; + /* Total size needed function descriptor entries referenced in PLT + entries, that would be profitable to place in offsets close to + the PIC register. */ + bfd_vma fdplt; + /* Total size needed by lazy PLT entries. */ + bfd_vma lzplt; + /* Number of relocations carried over from input object files. */ + unsigned long relocs; + /* Number of fixups introduced by relocations in input object files. */ + unsigned long fixups; +}; + /* Create a Blackfin ELF linker hash table. */ static struct bfd_link_hash_table * @@ -1905,224 +2521,6 @@ _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry, return TRUE; } - - -/* Look through the relocs for a section during the first phase, and - allocate space in the global offset table or procedure linkage - table. */ - -static bfd_boolean -bfin_check_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_signed_vma *local_got_refcounts; - const Elf_Internal_Rela *rel; - const Elf_Internal_Rela *rel_end; - asection *sgot; - asection *srelgot; - asection *sreloc; - if (info->relocatable) - return TRUE; - - dynobj = elf_hash_table (info)->dynobj; - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (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 = 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]; - - switch (ELF32_R_TYPE (rel->r_info)) - { - /* This relocation describes the C++ object vtable hierarchy. - Reconstruct it for later use during GC. */ - case R_BFIN_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_BFIN_GNU_VTENTRY: - BFD_ASSERT (h != NULL); - if (h != NULL - && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) - return FALSE; - break; - - case R_got: - if (h != NULL - && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) - break; - /* Fall through. */ - - 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) - { - flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS - | SEC_IN_MEMORY | SEC_LINKER_CREATED - | SEC_READONLY); - srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", - flags); - if (srelgot == NULL - || !bfd_set_section_alignment (dynobj, srelgot, 2)) - return FALSE; - } - } - - if (h != NULL) - { - if (h->got.refcount == 0) - { - /* Make sure this symbol is output as a dynamic symbol. */ - if (h->dynindx == -1 && !h->forced_local) - { - if (!bfd_elf_link_record_dynamic_symbol (info, h)) - return FALSE; - } - - /* Allocate space in the .got section. */ - sgot->size += 4; - /* Allocate relocation space. */ - srelgot->size += sizeof (Elf32_External_Rela); - } - h->got.refcount++; - } - else - { - /* This is a global offset table entry for a local symbol. */ - if (local_got_refcounts == NULL) - { - bfd_size_type size; - - size = symtab_hdr->sh_info; - size *= sizeof (bfd_signed_vma); - local_got_refcounts = ((bfd_signed_vma *) - bfd_zalloc (abfd, size)); - if (local_got_refcounts == NULL) - return FALSE; - elf_local_got_refcounts (abfd) = local_got_refcounts; - } - if (local_got_refcounts[r_symndx] == 0) - { - sgot->size += 4; - if (info->shared) - { - /* If we are generating a shared object, we need to - output a R_68K_RELATIVE reloc so that the dynamic - linker can adjust this GOT entry. */ - srelgot->size += sizeof (Elf32_External_Rela); - } - } - local_got_refcounts[r_symndx]++; - } - break; - - default: - break; - } - } - - return TRUE; -} - -static enum elf_reloc_type_class -elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela) -{ - switch ((int) ELF32_R_TYPE (rela->r_info)) - { - default: - return reloc_class_normal; - } -} - -static bfd_reloc_status_type -bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto, - bfd *input_bfd, asection *input_section, - bfd_byte *contents, bfd_vma address, - bfd_vma value, bfd_vma addend) -{ - int r_type = ELF32_R_TYPE (rel->r_info); - - if (r_type == R_pcrel24 || r_type == R_pcrel24_jump_l) - { - bfd_reloc_status_type r = bfd_reloc_ok; - bfd_vma x; - - if (address > bfd_get_section_limit (input_bfd, input_section)) - return bfd_reloc_outofrange; - - value += addend; - - /* Perform usual pc-relative correction. */ - value -= input_section->output_section->vma + input_section->output_offset; - value -= address; - - /* We are getting reloc_entry->address 2 byte off from - the start of instruction. Assuming absolute postion - of the reloc data. But, following code had been written assuming - reloc address is starting at begining of instruction. - To compensate that I have increased the value of - relocation by 1 (effectively 2) and used the addr -2 instead of addr. */ - - value += 2; - address -= 2; - - if ((value & 0xFF000000) != 0 - && (value & 0xFF000000) != 0xFF000000) - r = bfd_reloc_overflow; - - value >>= 1; - - x = bfd_get_16 (input_bfd, contents + address); - x = (x & 0xff00) | ((value >> 16) & 0xff); - bfd_put_16 (input_bfd, x, contents + address); - - x = bfd_get_16 (input_bfd, contents + address + 2); - x = value & 0xFFFF; - bfd_put_16 (input_bfd, x, contents + address + 2); - return r; - } - - return _bfd_final_link_relocate (howto, input_bfd, input_section, contents, - rel->r_offset, value, addend); - -} - /* Relocate an Blackfin ELF section. @@ -2841,302 +3239,6 @@ bfinfdpic_relocate_section (bfd * output_bfd, return TRUE; } -static bfd_boolean -bfin_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) -{ - bfd *dynobj; - Elf_Internal_Shdr *symtab_hdr; - struct elf_link_hash_entry **sym_hashes; - bfd_vma *local_got_offsets; - asection *sgot; - asection *sreloc; - Elf_Internal_Rela *rel; - Elf_Internal_Rela *relend; - int i = 0; - - 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); - - sgot = NULL; - sreloc = NULL; - - rel = relocs; - relend = relocs + input_section->reloc_count; - for (; rel < relend; rel++, i++) - { - int r_type; - reloc_howto_type *howto; - unsigned long r_symndx; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; - asection *sec; - bfd_vma relocation = 0; - bfd_boolean unresolved_reloc; - bfd_reloc_status_type r; - bfd_vma address; - - r_type = ELF32_R_TYPE (rel->r_info); - if (r_type < 0 || r_type >= 243) - { - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - - if (r_type == R_BFIN_GNU_VTENTRY - || r_type == R_BFIN_GNU_VTINHERIT) - continue; - - howto = bfin_reloc_type_lookup (input_bfd, r_type); - if (howto == NULL) - { - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - r_symndx = ELF32_R_SYM (rel->r_info); - - h = NULL; - sym = NULL; - sec = NULL; - unresolved_reloc = FALSE; - - 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); - } - else - { - 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); - } - - if (sec != NULL && elf_discarded_section (sec)) - { - /* For relocs against symbols from removed linkonce sections, - or sections discarded by a linker script, we just want the - section contents zeroed. Avoid any special processing. */ - _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); - rel->r_info = 0; - rel->r_addend = 0; - continue; - } - - if (info->relocatable) - continue; - - address = rel->r_offset; - - /* Then, process normally. */ - switch (r_type) - { - case R_BFIN_GNU_VTINHERIT: - case R_BFIN_GNU_VTENTRY: - return bfd_reloc_ok; - - case R_got: - /* Relocation is to the address of the entry for this symbol - in the global offset table. */ - if (h != NULL - && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0) - goto do_default; - /* Fall through. */ - /* Relocation is the offset of the entry for this symbol in - the global offset table. */ - - { - bfd_vma off; - - if (dynobj == NULL) - { - /* Create the .got section. */ - elf_hash_table (info)->dynobj = dynobj = output_bfd; - 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 (h != NULL) - { - bfd_boolean dyn; - - off = h->got.offset; - BFD_ASSERT (off != (bfd_vma) - 1); - dyn = elf_hash_table (info)->dynamic_sections_created; - - if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) - || (info->shared - && (info->symbolic - || h->dynindx == -1 - || h->forced_local) - && h->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 4, 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_32 (output_bfd, relocation, - sgot->contents + off); - h->got.offset |= 1; - } - } - else - unresolved_reloc = FALSE; - } - else - { - 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 4. We use - the least significant bit to record whether we have - already generated the necessary reloc. */ - if ((off & 1) != 0) - off &= ~1; - else - { - bfd_put_32 (output_bfd, relocation, sgot->contents + off); - - if (info->shared) - { - asection *s; - Elf_Internal_Rela outrel; - bfd_byte *loc; - - s = bfd_get_section_by_name (dynobj, ".rela.got"); - BFD_ASSERT (s != NULL); - - outrel.r_offset = (sgot->output_section->vma - + sgot->output_offset + off); - outrel.r_info = - ELF32_R_INFO (0, R_pcrel24); - outrel.r_addend = relocation; - loc = s->contents; - loc += - s->reloc_count++ * sizeof (Elf32_External_Rela); - bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); - } - - local_got_offsets[r_symndx] |= 1; - } - } - - relocation = sgot->output_offset + off; - rel->r_addend = 0; - /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */ - relocation /= 4; - } - goto do_default; - - default: - do_default: - r = bfin_final_link_relocate (rel, howto, input_bfd, input_section, - contents, address, - relocation, rel->r_addend); - - break; - } - - /* Dynamic relocs are not propagated for SEC_DEBUGGING sections - because such sections are not SEC_ALLOC and thus ld.so will - not process them. */ - if (unresolved_reloc - && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)) - { - (*_bfd_error_handler) - (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), - input_bfd, - input_section, (long) rel->r_offset, h->root.root.string); - return FALSE; - } - - if (r != bfd_reloc_ok) - { - const char *name; - - if (h != NULL) - 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 (r == bfd_reloc_overflow) - { - if (!(info->callbacks->reloc_overflow - (info, (h ? &h->root : NULL), name, howto->name, - (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) - return FALSE; - } - else - { - (*_bfd_error_handler) - (_("%B(%A+0x%lx): reloc against `%s': error %d"), - input_bfd, input_section, - (long) rel->r_offset, name, (int) r); - return FALSE; - } - } - } - - return TRUE; -} - -static asection * -bfin_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_BFIN_GNU_VTINHERIT: - case R_BFIN_GNU_VTENTRY: - return NULL; - } - - return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); -} - /* Update the relocation information for the relocations of the section being removed. */ @@ -3249,79 +3351,6 @@ bfinfdpic_gc_sweep_hook (bfd *abfd, return TRUE; } -/* Update the got entry reference counts for the section being removed. */ - -static bfd_boolean -bfin_gc_sweep_hook (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; - bfd_signed_vma *local_got_refcounts; - const Elf_Internal_Rela *rel, *relend; - bfd *dynobj; - asection *sgot; - asection *srelgot; - - dynobj = elf_hash_table (info)->dynobj; - if (dynobj == NULL) - return TRUE; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - local_got_refcounts = elf_local_got_refcounts (abfd); - - sgot = bfd_get_section_by_name (dynobj, ".got"); - srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); - - relend = relocs + sec->reloc_count; - for (rel = relocs; rel < relend; rel++) - { - unsigned long r_symndx; - struct elf_link_hash_entry *h; - - switch (ELF32_R_TYPE (rel->r_info)) - { - case R_got: - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx >= symtab_hdr->sh_info) - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - if (h->got.refcount > 0) - { - --h->got.refcount; - if (h->got.refcount == 0) - { - /* We don't need the .got entry any more. */ - sgot->size -= 4; - srelgot->size -= sizeof (Elf32_External_Rela); - } - } - } - else if (local_got_refcounts != NULL) - { - if (local_got_refcounts[r_symndx] > 0) - { - --local_got_refcounts[r_symndx]; - if (local_got_refcounts[r_symndx] == 0) - { - /* We don't need the .got entry any more. */ - sgot->size -= 4; - if (info->shared) - srelgot->size -= sizeof (Elf32_External_Rela); - } - } - } - break; - default: - break; - } - } - return TRUE; -} - /* We need dynamic symbols for every section, since segments can relocate independently. */ static bfd_boolean @@ -3557,37 +3586,6 @@ elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) return TRUE; } -/* The name of the dynamic interpreter. This is put in the .interp - section. */ - -#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" - -#define DEFAULT_STACK_SIZE 0x20000 - -/* This structure is used to collect the number of entries present in - each addressable range of the got. */ -struct _bfinfdpic_dynamic_got_info -{ - /* Several bits of information about the current link. */ - struct bfd_link_info *info; - /* Total size needed for GOT entries within the 18- or 32-bit - ranges. */ - bfd_vma got17m4, gothilo; - /* Total size needed for function descriptor entries within the 18- - or 32-bit ranges. */ - bfd_vma fd17m4, fdhilo; - /* Total size needed function descriptor entries referenced in PLT - entries, that would be profitable to place in offsets close to - the PIC register. */ - bfd_vma fdplt; - /* Total size needed by lazy PLT entries. */ - bfd_vma lzplt; - /* Number of relocations carried over from input object files. */ - unsigned long relocs; - /* Number of fixups introduced by relocations in input object files. */ - unsigned long fixups; -}; - /* Compute the total GOT size required by each symbol in each range. Symbols may require up to 4 words in the GOT: an entry pointing to the symbol, an entry pointing to its function descriptor, and a |