From 3a65329d1f9b69ca9b1310ca2cbf22d051be92bd Mon Sep 17 00:00:00 2001 From: Stephane Carrez Date: Mon, 21 Apr 2003 13:22:14 +0000 Subject: [PATCH] * elf32-m68hc1x.c: New file (from elf32-m68hc11.c and elf32-m68hc12.c) (m68hc11_elf_hash_table_create): New function. (elf32_m68hc11_link_hash_table_free): New function. (stub_hash_newfunc): New function. (m68hc11_add_stub): New function. (elf32_m68hc11_add_symbol_hook): New function. (elf32_m68hc11_setup_section_lists): New function. (elf32_m68hc11_next_input_section): New function. (elf32_m68hc11_size_stubs): New function. (elf32_m68hc11_build_stubs): New function. (m68hc11_get_relocation_value): New function. (elf32_m68hc11_relocate_section): Call the above to redirect some relocations to the trampoline code. (m68hc11_elf_export_one_stub): New function. (m68hc11_elf_set_symbol): New function. (elf32_m68hc11_build_stubs): Call it via bfd_hash_traverse. (m68hc11_elf_get_bank_parameters): Get parameters only when the info is not yet initialized. * elf32-m68hc1x.h: New file (from elf32-m68hc11.c and elf32-m68hc12.c) (elf32_m68hc11_stub_hash_entry): New struct. (m68hc11_page_info): Add trampoline handler address. (m68hc11_elf_link_hash_table): Add stubs generation members. (elf32_m68hc11_add_symbol_hook): Declare. (elf32_m68hc11_setup_section_lists): Declare. (elf32_m68hc11_size_stubs): Declare. (elf32_m68hc11_build_stubs): Declare. * elf32-m68hc11.c (m68hc11_elf_ignore_reloc): Move to elf32-m68hc1x.c. (elf32_m68hc11_gc_mark_hook, elf32_m68hc11_gc_sweep_hook): Likewise. (elf32_m68hc11_check_relocs, elf32_m68hc11_relocate_section): Ditto. (_bfd_m68hc11_elf_set_private_flags): Ditto. (_bfd_m68hc11_elf_merge_private_bfd_data): Ditto. (_bfd_m68hc11_elf_print_private_bfd_data): Ditto. (bfd_elf32_bfd_link_hash_table_create): Define. (elf_backend_add_symbol_hook): Define. (m68hc11_elf_bfd_link_hash_table_create): New function. (m68hc11_elf_build_one_stub): New function. (m68hc11_elf_size_one_stub): New function. (m68hc11_elf_bfd_link_hash_table_create): Install the above. (bfd_elf32_bfd_link_hash_table_create): Define. * elf32-m68hc12.c (m68hc11_elf_ignore_reloc): Remove. (m68hc12_addr_is_banked): Remove, use m68hc11_addr_is_banked. (m68hc12_phys_addr): Ditto. (m68hc12_phys_page): Ditto. (m68hc12_elf_special_reloc): Move to elf32-m68hc1x.c. (elf32_m68hc11_gc_mark_hook): Likewise. (elf32_m68hc11_gc_sweep_hook): Likewise. (elf32_m68hc11_check_relocs): Likewise. (elf32_m68hc11_relocate_section): Likewise. (_bfd_m68hc12_elf_set_private_flags): Likewise. (_bfd_m68hc12_elf_merge_private_bfd_data): Likewise. (_bfd_m68hc12_elf_print_private_bfd_data): Likewise. (m68hc12_elf_build_one_stub): New function. (m68hc12_elf_size_one_stub): New function. (m68hc12_elf_bfd_link_hash_table_create): New function, use the above. (elf_backend_add_symbol_hook): Define. (elf_m68hc11_howto_table): Use TRUE for pcrel relocs; fix masks. --- bfd/ChangeLog | 62 ++ bfd/elf32-m68hc11.c | 549 ++++------------ bfd/elf32-m68hc12.c | 477 ++++---------- bfd/elf32-m68hc1x.c | 1508 +++++++++++++++++++++++++++++++++++++++++++ bfd/elf32-m68hc1x.h | 205 ++++++ 5 files changed, 1998 insertions(+), 803 deletions(-) create mode 100644 bfd/elf32-m68hc1x.c create mode 100644 bfd/elf32-m68hc1x.h diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 00042678430..ba50cbcf651 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,65 @@ +2003-04-21 Stephane Carrez + + * elf32-m68hc1x.c: New file (from elf32-m68hc11.c and elf32-m68hc12.c) + (m68hc11_elf_hash_table_create): New function. + (elf32_m68hc11_link_hash_table_free): New function. + (stub_hash_newfunc): New function. + (m68hc11_add_stub): New function. + (elf32_m68hc11_add_symbol_hook): New function. + (elf32_m68hc11_setup_section_lists): New function. + (elf32_m68hc11_next_input_section): New function. + (elf32_m68hc11_size_stubs): New function. + (elf32_m68hc11_build_stubs): New function. + (m68hc11_get_relocation_value): New function. + (elf32_m68hc11_relocate_section): Call the above to redirect + some relocations to the trampoline code. + (m68hc11_elf_export_one_stub): New function. + (m68hc11_elf_set_symbol): New function. + (elf32_m68hc11_build_stubs): Call it via bfd_hash_traverse. + (m68hc11_elf_get_bank_parameters): Get parameters only when the info + is not yet initialized. + + * elf32-m68hc1x.h: New file (from elf32-m68hc11.c and elf32-m68hc12.c) + (elf32_m68hc11_stub_hash_entry): New struct. + (m68hc11_page_info): Add trampoline handler address. + (m68hc11_elf_link_hash_table): Add stubs generation members. + (elf32_m68hc11_add_symbol_hook): Declare. + (elf32_m68hc11_setup_section_lists): Declare. + (elf32_m68hc11_size_stubs): Declare. + (elf32_m68hc11_build_stubs): Declare. + + * elf32-m68hc11.c (m68hc11_elf_ignore_reloc): Move to elf32-m68hc1x.c. + (elf32_m68hc11_gc_mark_hook, elf32_m68hc11_gc_sweep_hook): Likewise. + (elf32_m68hc11_check_relocs, elf32_m68hc11_relocate_section): Ditto. + (_bfd_m68hc11_elf_set_private_flags): Ditto. + (_bfd_m68hc11_elf_merge_private_bfd_data): Ditto. + (_bfd_m68hc11_elf_print_private_bfd_data): Ditto. + (bfd_elf32_bfd_link_hash_table_create): Define. + (elf_backend_add_symbol_hook): Define. + (m68hc11_elf_bfd_link_hash_table_create): New function. + (m68hc11_elf_build_one_stub): New function. + (m68hc11_elf_size_one_stub): New function. + (m68hc11_elf_bfd_link_hash_table_create): Install the above. + (bfd_elf32_bfd_link_hash_table_create): Define. + + * elf32-m68hc12.c (m68hc11_elf_ignore_reloc): Remove. + (m68hc12_addr_is_banked): Remove, use m68hc11_addr_is_banked. + (m68hc12_phys_addr): Ditto. + (m68hc12_phys_page): Ditto. + (m68hc12_elf_special_reloc): Move to elf32-m68hc1x.c. + (elf32_m68hc11_gc_mark_hook): Likewise. + (elf32_m68hc11_gc_sweep_hook): Likewise. + (elf32_m68hc11_check_relocs): Likewise. + (elf32_m68hc11_relocate_section): Likewise. + (_bfd_m68hc12_elf_set_private_flags): Likewise. + (_bfd_m68hc12_elf_merge_private_bfd_data): Likewise. + (_bfd_m68hc12_elf_print_private_bfd_data): Likewise. + (m68hc12_elf_build_one_stub): New function. + (m68hc12_elf_size_one_stub): New function. + (m68hc12_elf_bfd_link_hash_table_create): New function, use the above. + (elf_backend_add_symbol_hook): Define. + (elf_m68hc11_howto_table): Use TRUE for pcrel relocs; fix masks. + 2003-04-18 Nick Clifton * format.c (bfd_check_format_matches): Only check associated diff --git a/bfd/elf32-m68hc11.c b/bfd/elf32-m68hc11.c index 26fa3933a74..ebd9d42b95e 100644 --- a/bfd/elf32-m68hc11.c +++ b/bfd/elf32-m68hc11.c @@ -24,29 +24,25 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "bfdlink.h" #include "libbfd.h" #include "elf-bfd.h" +#include "elf32-m68hc1x.h" #include "elf/m68hc11.h" +#include "opcode/m68hc11.h" +/* Relocation functions. */ static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); static void m68hc11_info_to_howto_rel PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); -static bfd_reloc_status_type m68hc11_elf_ignore_reloc - PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); - -/* GC mark and sweep. */ -static asection *elf32_m68hc11_gc_mark_hook - PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); -static bfd_boolean elf32_m68hc11_gc_sweep_hook - PARAMS ((bfd *, struct bfd_link_info *, asection *, - const Elf_Internal_Rela *)); -static bfd_boolean elf32_m68hc11_check_relocs - PARAMS ((bfd *, struct bfd_link_info *, asection *, - const Elf_Internal_Rela *)); -static bfd_boolean elf32_m68hc11_relocate_section - PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, - Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); +/* Trampoline generation. */ +static bfd_boolean m68hc11_elf_size_one_stub + PARAMS((struct bfd_hash_entry *gen_entry, PTR in_arg)); +static bfd_boolean m68hc11_elf_build_one_stub + PARAMS((struct bfd_hash_entry *gen_entry, PTR in_arg)); +static struct bfd_link_hash_table* m68hc11_elf_bfd_link_hash_table_create + PARAMS ((bfd* abfd)); + +/* Linker relaxation. */ static bfd_boolean m68hc11_elf_relax_section PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *)); static void m68hc11_elf_relax_delete_bytes @@ -56,18 +52,14 @@ static void m68hc11_relax_group unsigned long, unsigned long)); static int compare_reloc PARAMS ((const void *, const void *)); - -bfd_boolean _bfd_m68hc11_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); -bfd_boolean _bfd_m68hc11_elf_set_private_flags PARAMS ((bfd *, flagword)); -bfd_boolean _bfd_m68hc11_elf_print_private_bfd_data PARAMS ((bfd *, PTR)); - /* Use REL instead of RELA to save space */ #define USE_REL 1 -/* The Motorola 68HC11 microcontroler only addresses 64Kb. +/* The Motorola 68HC11 microcontroller only addresses 64Kb but we also + support a memory bank switching mechanism similar to 68HC12. We must handle 8 and 16-bit relocations. The 32-bit relocation - is defined but not used except by gas when -gstabs is used (which - is wrong). + are used for debugging sections (DWARF2) to represent a virtual + address. The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */ static reloc_howto_type elf_m68hc11_howto_table[] = { /* This reloc does nothing. */ @@ -367,25 +359,6 @@ bfd_elf32_bfd_reloc_type_lookup (abfd, code) return NULL; } -/* This function is used for relocs which are only used for relaxing, - which the linker should otherwise ignore. */ - -static bfd_reloc_status_type -m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section, - output_bfd, error_message) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *reloc_entry; - asymbol *symbol ATTRIBUTE_UNUSED; - PTR data ATTRIBUTE_UNUSED; - asection *input_section; - bfd *output_bfd; - char **error_message ATTRIBUTE_UNUSED; -{ - if (output_bfd != NULL) - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; -} - /* Set the howto pointer for an M68HC11 ELF reloc. */ static void @@ -401,50 +374,106 @@ m68hc11_info_to_howto_rel (abfd, cache_ptr, dst) cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; } -static asection * -elf32_m68hc11_gc_mark_hook (sec, info, rel, h, sym) - asection *sec; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - Elf_Internal_Rela *rel; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; -{ - if (h != NULL) - { - switch (ELF32_R_TYPE (rel->r_info)) - { - default: - 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; + +/* Far trampoline generation. */ - default: - break; - } - } - } - else - return bfd_section_from_elf_index (sec->owner, sym->st_shndx); +/* Build a 68HC11 trampoline stub. */ +static bfd_boolean +m68hc11_elf_build_one_stub (gen_entry, in_arg) + struct bfd_hash_entry *gen_entry; + PTR in_arg; +{ + struct elf32_m68hc11_stub_hash_entry *stub_entry; + struct bfd_link_info *info; + struct m68hc11_elf_link_hash_table *htab; + asection *stub_sec; + bfd *stub_bfd; + bfd_byte *loc; + bfd_vma sym_value, phys_page, phys_addr; + + /* Massage our args to the form they really have. */ + stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; + info = (struct bfd_link_info *) in_arg; + + htab = m68hc11_elf_hash_table (info); + + stub_sec = stub_entry->stub_sec; + + /* Make a note of the offset within the stubs for this entry. */ + stub_entry->stub_offset = stub_sec->_raw_size; + stub_sec->_raw_size += 10; + loc = stub_sec->contents + stub_entry->stub_offset; + + stub_bfd = stub_sec->owner; + + /* Create the trampoline call stub: + + pshb + ldab #%page(symbol) + ldy #%addr(symbol) + jmp __trampoline + + */ + sym_value = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value); + phys_page = m68hc11_phys_page (&htab->pinfo, sym_value); + + /* pshb; ldab #%page(sym) */ + bfd_put_8 (stub_bfd, 0x37, loc); + bfd_put_8 (stub_bfd, 0xC6, loc + 1); + bfd_put_8 (stub_bfd, phys_page, loc + 2); + loc += 3; + + /* ldy #%addr(sym) */ + bfd_put_8 (stub_bfd, 0x18, loc); + bfd_put_8 (stub_bfd, 0xCE, loc + 1); + bfd_put_16 (stub_bfd, phys_addr, loc + 2); + loc += 4; + + /* jmp __trampoline */ + bfd_put_8 (stub_bfd, 0x7E, loc); + bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1); - return NULL; + return TRUE; } +/* As above, but don't actually build the stub. Just bump offset so + we know stub section sizes. */ + static bfd_boolean -elf32_m68hc11_gc_sweep_hook (abfd, info, sec, relocs) - bfd *abfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - asection *sec ATTRIBUTE_UNUSED; - const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; +m68hc11_elf_size_one_stub (gen_entry, in_arg) + struct bfd_hash_entry *gen_entry; + PTR in_arg ATTRIBUTE_UNUSED; { - /* We don't use got and plt entries for 68hc11/68hc12. */ + struct elf32_m68hc11_stub_hash_entry *stub_entry; + + /* Massage our args to the form they really have. */ + stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; + + stub_entry->stub_sec->_raw_size += 10; return TRUE; } +/* Create a 68HC11 ELF linker hash table. */ + +static struct bfd_link_hash_table * +m68hc11_elf_bfd_link_hash_table_create (abfd) + bfd *abfd; +{ + struct m68hc11_elf_link_hash_table *ret; + + ret = m68hc11_elf_hash_table_create (abfd); + if (ret == (struct m68hc11_elf_link_hash_table *) NULL) + return NULL; + + ret->size_one_stub = m68hc11_elf_size_one_stub; + ret->build_one_stub = m68hc11_elf_build_one_stub; + + return &ret->root.root; +} + /* 68HC11 Linker Relaxation. */ @@ -1251,365 +1280,7 @@ m68hc11_elf_relax_delete_bytes (abfd, sec, addr, count) } } -/* 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 -elf32_m68hc11_check_relocs (abfd, info, sec, 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->relocateable) - 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]; - - switch (ELF32_R_TYPE (rel->r_info)) - { - /* This relocation describes the C++ object vtable hierarchy. - Reconstruct it for later use during GC. */ - case R_M68HC11_GNU_VTINHERIT: - if (!_bfd_elf32_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_M68HC11_GNU_VTENTRY: - if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) - return FALSE; - break; - } - } - - return TRUE; -} - -/* Relocate a 68hc11/68hc12 ELF section. */ -static bfd_boolean -elf32_m68hc11_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, *relend; - const char *name; - - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (input_bfd); - - rel = relocs; - relend = relocs + input_section->reloc_count; - for (; rel < relend; rel++) - { - int r_type; - 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; - - r_symndx = ELF32_R_SYM (rel->r_info); - r_type = ELF32_R_TYPE (rel->r_info); - - if (r_type == R_M68HC11_GNU_VTENTRY - || r_type == R_M68HC11_GNU_VTINHERIT ) - continue; - - howto = elf_m68hc11_howto_table + r_type; - - 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. */ - 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); - } - 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; - 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; - } - } - - 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 || *name == '\0') - name = bfd_section_name (input_bfd, sec); - } - - r = _bfd_final_link_relocate (howto, input_bfd, input_section, - contents, rel->r_offset, - relocation, rel->r_addend); - - if (r != bfd_reloc_ok) - { - const char * msg = (const char *) 0; - - switch (r) - { - case bfd_reloc_overflow: - if (!((*info->callbacks->reloc_overflow) - (info, name, howto->name, (bfd_vma) 0, - input_bfd, input_section, rel->r_offset))) - return FALSE; - break; - - case bfd_reloc_undefined: - if (!((*info->callbacks->undefined_symbol) - (info, name, input_bfd, input_section, - rel->r_offset, TRUE))) - return FALSE; - break; - - case bfd_reloc_outofrange: - msg = _ ("internal error: out of range error"); - goto common_error; - - case bfd_reloc_notsupported: - msg = _ ("internal error: unsupported relocation error"); - goto common_error; - - case bfd_reloc_dangerous: - msg = _ ("internal error: dangerous error"); - goto common_error; - - default: - msg = _ ("internal error: unknown error"); - /* fall through */ - - common_error: - if (!((*info->callbacks->warning) - (info, msg, name, input_bfd, input_section, - rel->r_offset))) - return FALSE; - break; - } - } - } - - return TRUE; -} - - -/* Set and control ELF flags in ELF header. */ - -bfd_boolean -_bfd_m68hc11_elf_set_private_flags (abfd, flags) - bfd *abfd; - flagword flags; -{ - BFD_ASSERT (!elf_flags_init (abfd) - || elf_elfheader (abfd)->e_flags == flags); - - elf_elfheader (abfd)->e_flags = flags; - elf_flags_init (abfd) = TRUE; - return TRUE; -} - -/* Merge backend specific data from an object file to the output - object file when linking. */ - -bfd_boolean -_bfd_m68hc11_elf_merge_private_bfd_data (ibfd, obfd) - bfd *ibfd; - bfd *obfd; -{ - flagword old_flags; - flagword new_flags; - bfd_boolean ok = TRUE; - - /* Check if we have the same endianess */ - if (!_bfd_generic_verify_endian_match (ibfd, obfd)) - return FALSE; - - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour - || bfd_get_flavour (obfd) != bfd_target_elf_flavour) - return TRUE; - - new_flags = elf_elfheader (ibfd)->e_flags; - elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI; - old_flags = elf_elfheader (obfd)->e_flags; - - if (! elf_flags_init (obfd)) - { - elf_flags_init (obfd) = TRUE; - elf_elfheader (obfd)->e_flags = new_flags; - elf_elfheader (obfd)->e_ident[EI_CLASS] - = elf_elfheader (ibfd)->e_ident[EI_CLASS]; - - if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) - && bfd_get_arch_info (obfd)->the_default) - { - if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), - bfd_get_mach (ibfd))) - return FALSE; - } - - return TRUE; - } - - /* Check ABI compatibility. */ - if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) - { - (*_bfd_error_handler) - (_("%s: linking files compiled for 16-bit integers (-mshort) " - "and others for 32-bit integers"), - bfd_archive_filename (ibfd)); - ok = FALSE; - } - if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) - { - (*_bfd_error_handler) - (_("%s: linking files compiled for 32-bit double (-fshort-double) " - "and others for 64-bit double"), - bfd_archive_filename (ibfd)); - ok = FALSE; - } - new_flags &= ~EF_M68HC11_ABI; - old_flags &= ~EF_M68HC11_ABI; - - /* Warn about any other mismatches */ - if (new_flags != old_flags) - { - (*_bfd_error_handler) - (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), - bfd_archive_filename (ibfd), (unsigned long) new_flags, - (unsigned long) old_flags); - ok = FALSE; - } - - if (! ok) - { - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - - return TRUE; -} - -bfd_boolean -_bfd_m68hc11_elf_print_private_bfd_data (abfd, ptr) - bfd *abfd; - PTR ptr; -{ - FILE *file = (FILE *) ptr; - - BFD_ASSERT (abfd != NULL && ptr != NULL); - - /* Print normal ELF private data. */ - _bfd_elf_print_private_bfd_data (abfd, ptr); - - /* xgettext:c-format */ - fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); - - if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) - fprintf (file, _("[abi=32-bit int,")); - else - fprintf (file, _("[abi=16-bit int,")); - - if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) - fprintf (file, _(" 64-bit double]")); - else - fprintf (file, _(" 32-bit double]")); - - if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS) - fprintf (file, _(" [memory=bank-model]")); - else - fprintf (file, _(" [memory=flat]")); - - fputc ('\n', file); - - return TRUE; -} - -/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c. - The Motorola spec says to use a different Elf machine code. */ #define ELF_ARCH bfd_arch_m68hc11 #define ELF_MACHINE_CODE EM_68HC11 #define ELF_MAXPAGESIZE 0x1000 @@ -1624,9 +1295,15 @@ _bfd_m68hc11_elf_print_private_bfd_data (abfd, ptr) #define elf_backend_gc_sweep_hook elf32_m68hc11_gc_sweep_hook #define elf_backend_check_relocs elf32_m68hc11_check_relocs #define elf_backend_relocate_section elf32_m68hc11_relocate_section +#define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook #define elf_backend_object_p 0 #define elf_backend_final_write_processing 0 #define elf_backend_can_gc_sections 1 + +#define bfd_elf32_bfd_link_hash_table_create \ + m68hc11_elf_bfd_link_hash_table_create +#define bfd_elf32_bfd_link_hash_table_free \ + m68hc11_elf_bfd_link_hash_table_free #define bfd_elf32_bfd_merge_private_bfd_data \ _bfd_m68hc11_elf_merge_private_bfd_data #define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags diff --git a/bfd/elf32-m68hc12.c b/bfd/elf32-m68hc12.c index 219fd6b0da3..54fdca28277 100644 --- a/bfd/elf32-m68hc12.c +++ b/bfd/elf32-m68hc12.c @@ -1,5 +1,5 @@ /* Motorola 68HC12-specific support for 32-bit ELF - Copyright 1999, 2000, 2002 Free Software Foundation, Inc. + Copyright 1999, 2000, 2002, 2003 Free Software Foundation, Inc. Contributed by Stephane Carrez (stcarrez@nerim.fr) (Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com)) @@ -21,49 +21,33 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "bfd.h" #include "sysdep.h" +#include "bfdlink.h" #include "libbfd.h" #include "elf-bfd.h" +#include "elf32-m68hc1x.h" #include "elf/m68hc11.h" #include "opcode/m68hc11.h" +/* Relocation functions. */ static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); static void m68hc11_info_to_howto_rel PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); -static bfd_reloc_status_type m68hc11_elf_ignore_reloc - PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); -static bfd_reloc_status_type m68hc12_elf_special_reloc - PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); -static int m68hc12_addr_is_banked PARAMS ((bfd_vma)); -static bfd_vma m68hc12_phys_addr PARAMS ((bfd_vma)); -static bfd_vma m68hc12_phys_page PARAMS ((bfd_vma)); - -/* GC mark and sweep. */ -static asection *elf32_m68hc11_gc_mark_hook - PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); -static bfd_boolean elf32_m68hc11_gc_sweep_hook - PARAMS ((bfd *, struct bfd_link_info *, asection *, - const Elf_Internal_Rela *)); +/* Trampoline generation. */ +static bfd_boolean m68hc12_elf_size_one_stub + PARAMS((struct bfd_hash_entry *gen_entry, PTR in_arg)); +static bfd_boolean m68hc12_elf_build_one_stub + PARAMS((struct bfd_hash_entry *gen_entry, PTR in_arg)); +static struct bfd_link_hash_table* m68hc12_elf_bfd_link_hash_table_create + PARAMS((bfd*)); static bfd_boolean m68hc12_elf_set_mach_from_flags PARAMS ((bfd *)); -bfd_boolean _bfd_m68hc12_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); -bfd_boolean _bfd_m68hc12_elf_set_private_flags PARAMS ((bfd *, flagword)); -bfd_boolean _bfd_m68hc12_elf_print_private_bfd_data PARAMS ((bfd *, PTR)); - - - /* Use REL instead of RELA to save space */ #define USE_REL 1 -/* The Motorola 68HC11 microcontroler only addresses 64Kb. - We must handle 8 and 16-bit relocations. The 32-bit relocation - is defined but not used except by gas when -gstabs is used (which - is wrong). - - The 68HC12 microcontroler has a memory bank switching system +/* The 68HC12 microcontroler has a memory bank switching system with a 16Kb window in the 64Kb address space. The extended memory is mapped in the 16Kb window (at 0x8000). The page register controls which 16Kb bank is mapped. The call/rtc instructions take care of @@ -199,7 +183,7 @@ static reloc_howto_type elf_m68hc11_howto_table[] = { FALSE, /* partial_inplace */ 0x00ff, /* src_mask */ 0x00ff, /* dst_mask */ - FALSE), /* pcrel_offset */ + TRUE), /* pcrel_offset */ /* A 16 bit absolute relocation */ HOWTO (R_M68HC11_16, /* type */ @@ -209,7 +193,7 @@ static reloc_howto_type elf_m68hc11_howto_table[] = { FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont /*bitfield */ , /* complain_on_overflow */ - m68hc12_elf_special_reloc, /* special_function */ + bfd_elf_generic_reloc, /* special_function */ "R_M68HC12_16", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -260,7 +244,7 @@ static reloc_howto_type elf_m68hc11_howto_table[] = { FALSE, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ - FALSE), /* pcrel_offset */ + TRUE), /* pcrel_offset */ /* GNU extension to record C++ vtable hierarchy */ HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */ @@ -295,16 +279,16 @@ static reloc_howto_type elf_m68hc11_howto_table[] = { /* A 24 bit relocation */ HOWTO (R_M68HC11_24, /* type */ 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ 24, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - m68hc12_elf_special_reloc, /* special_function */ + m68hc11_elf_special_reloc, /* special_function */ "R_M68HC12_24", /* name */ FALSE, /* partial_inplace */ - 0xffff, /* src_mask */ - 0xffff, /* dst_mask */ + 0xffffff, /* src_mask */ + 0xffffff, /* dst_mask */ FALSE), /* pcrel_offset */ /* A 16-bit low relocation */ @@ -315,7 +299,7 @@ static reloc_howto_type elf_m68hc11_howto_table[] = { FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - m68hc12_elf_special_reloc,/* special_function */ + m68hc11_elf_special_reloc,/* special_function */ "R_M68HC12_LO16", /* name */ FALSE, /* partial_inplace */ 0xffff, /* src_mask */ @@ -330,7 +314,7 @@ static reloc_howto_type elf_m68hc11_howto_table[] = { FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ - m68hc12_elf_special_reloc,/* special_function */ + m68hc11_elf_special_reloc,/* special_function */ "R_M68HC12_PAGE", /* name */ FALSE, /* partial_inplace */ 0x00ff, /* src_mask */ @@ -423,217 +407,112 @@ bfd_elf32_bfd_reloc_type_lookup (abfd, code) return NULL; } -/* This function is used for relocs which are only used for relaxing, - which the linker should otherwise ignore. */ +/* Set the howto pointer for an M68HC11 ELF reloc. */ -static bfd_reloc_status_type -m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section, - output_bfd, error_message) +static void +m68hc11_info_to_howto_rel (abfd, cache_ptr, dst) bfd *abfd ATTRIBUTE_UNUSED; - arelent *reloc_entry; - asymbol *symbol ATTRIBUTE_UNUSED; - PTR data ATTRIBUTE_UNUSED; - asection *input_section; - bfd *output_bfd; - char **error_message ATTRIBUTE_UNUSED; + arelent *cache_ptr; + Elf_Internal_Rela *dst; { - if (output_bfd != NULL) - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; -} + unsigned int r_type; -static int -m68hc12_addr_is_banked (addr) - bfd_vma addr; -{ - return (addr >= M68HC12_BANK_VIRT) ? 1 : 0; + r_type = ELF32_R_TYPE (dst->r_info); + BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max); + cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; } -/* Return the physical address seen by the processor, taking - into account banked memory. */ -static bfd_vma -m68hc12_phys_addr (addr) - bfd_vma addr; -{ - if (addr < M68HC12_BANK_VIRT) - return addr; - - /* Map the address to the memory bank. */ - addr -= M68HC12_BANK_VIRT; - addr &= M68HC12_BANK_MASK; - addr += M68HC12_BANK_BASE; - return addr; -} + +/* Far trampoline generation. */ -/* Return the page number corresponding to an address in banked memory. */ -static bfd_vma -m68hc12_phys_page (addr) - bfd_vma addr; +/* Build a 68HC12 trampoline stub. */ +static bfd_boolean +m68hc12_elf_build_one_stub (gen_entry, in_arg) + struct bfd_hash_entry *gen_entry; + PTR in_arg; { - if (addr < M68HC12_BANK_VIRT) - return 0; - - /* Map the address to the memory bank. */ - addr -= M68HC12_BANK_VIRT; - addr >>= M68HC12_BANK_SHIFT; - addr &= M68HC12_BANK_PAGE_MASK; - return addr; -} + struct elf32_m68hc11_stub_hash_entry *stub_entry; + struct bfd_link_info *info; + struct m68hc11_elf_link_hash_table *htab; + asection *stub_sec; + bfd *stub_bfd; + bfd_byte *loc; + bfd_vma sym_value, phys_page, phys_addr; -static bfd_reloc_status_type -m68hc12_elf_special_reloc (abfd, reloc_entry, symbol, data, input_section, - output_bfd, error_message) - bfd *abfd; - arelent *reloc_entry; - asymbol *symbol; - PTR data; - asection *input_section; - bfd *output_bfd; - char **error_message ATTRIBUTE_UNUSED; -{ - reloc_howto_type *howto; - bfd_vma relocation; - bfd_vma phys_addr; - bfd_vma phys_page; - bfd_vma insn_page; - bfd_vma insn_addr; - - if (output_bfd != (bfd *) NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (! reloc_entry->howto->partial_inplace - || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } + /* Massage our args to the form they really have. */ + stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; + info = (struct bfd_link_info *) in_arg; - if (output_bfd != NULL) - return bfd_reloc_continue; + htab = m68hc11_elf_hash_table (info); - if (reloc_entry->address > input_section->_cooked_size) - return bfd_reloc_outofrange; + stub_sec = stub_entry->stub_sec; - /* Compute relocation. */ - relocation = (symbol->value - + symbol->section->output_section->vma - + symbol->section->output_offset); - relocation += reloc_entry->addend; - relocation += bfd_get_16 (abfd, (bfd_byte*) data + reloc_entry->address); + /* Make a note of the offset within the stubs for this entry. */ + stub_entry->stub_offset = stub_sec->_raw_size; + stub_sec->_raw_size += 7; + loc = stub_sec->contents + stub_entry->stub_offset; - /* Do the memory bank mapping. */ - phys_addr = m68hc12_phys_addr (relocation); - phys_page = m68hc12_phys_page (relocation); + stub_bfd = stub_sec->owner; - howto = reloc_entry->howto; - if (howto->complain_on_overflow != complain_overflow_dont - && (phys_addr & (((bfd_vma) -1) << 16))) - return bfd_reloc_overflow; + /* Create the trampoline call stub: - switch (howto->type) - { - case R_M68HC11_16: - /* Get virtual address of instruction having the relocation. */ - insn_addr = input_section->output_section->vma - + input_section->output_offset - + reloc_entry->address; - - insn_page = m68hc12_phys_page (insn_addr); - - if (m68hc12_addr_is_banked (relocation) - && m68hc12_addr_is_banked (insn_addr) - && phys_page != insn_page) - { - *error_message = _("address is not in the same bank"); - return bfd_reloc_dangerous; - } - if (m68hc12_addr_is_banked (relocation) - && !m68hc12_addr_is_banked (insn_addr)) - { - *error_message = _("reference to a banked address in " - "the normal address space"); - return bfd_reloc_dangerous; - } - - case R_M68HC11_LO16: - bfd_put_16 (abfd, phys_addr, (bfd_byte*) data + reloc_entry->address); - break; + ldy #%addr(symbol) + call %page(symbol), __trampoline - case R_M68HC11_24: - bfd_put_16 (abfd, phys_addr, (bfd_byte*) data + reloc_entry->address); - bfd_put_8 (abfd, phys_page, (bfd_byte*) data + reloc_entry->address + 2); - break; + */ + sym_value = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value); + phys_page = m68hc11_phys_page (&htab->pinfo, sym_value); - case R_M68HC11_PAGE: - bfd_put_8 (abfd, phys_page, (bfd_byte*) data + reloc_entry->address); - break; + /* ldy #%page(sym) */ + bfd_put_8 (stub_bfd, 0xCD, loc); + bfd_put_16 (stub_bfd, phys_addr, loc + 1); + loc += 3; - default: - abort (); - break; - } + /* call %page(sym), __trampoline */ + bfd_put_8 (stub_bfd, 0x4a, loc); + bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1); + bfd_put_8 (stub_bfd, phys_page, loc + 3); - return bfd_reloc_ok; + return TRUE; } -/* Set the howto pointer for an M68HC11 ELF reloc. */ +/* As above, but don't actually build the stub. Just bump offset so + we know stub section sizes. */ -static void -m68hc11_info_to_howto_rel (abfd, cache_ptr, dst) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *cache_ptr; - Elf_Internal_Rela *dst; +static bfd_boolean +m68hc12_elf_size_one_stub (gen_entry, in_arg) + struct bfd_hash_entry *gen_entry; + PTR in_arg ATTRIBUTE_UNUSED; { - unsigned int r_type; + struct elf32_m68hc11_stub_hash_entry *stub_entry; - r_type = ELF32_R_TYPE (dst->r_info); - BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max); - cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; + /* Massage our args to the form they really have. */ + stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; + + stub_entry->stub_sec->_raw_size += 7; + return TRUE; } -static asection * -elf32_m68hc11_gc_mark_hook (sec, info, rel, h, sym) - asection *sec; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - Elf_Internal_Rela *rel; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; +/* Create a 68HC12 ELF linker hash table. */ + +static struct bfd_link_hash_table * +m68hc12_elf_bfd_link_hash_table_create (abfd) + bfd *abfd; { - if (h != NULL) - { - switch (ELF32_R_TYPE (rel->r_info)) - { - default: - 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 - return bfd_section_from_elf_index (sec->owner, sym->st_shndx); + struct m68hc11_elf_link_hash_table *ret; - return NULL; -} + ret = m68hc11_elf_hash_table_create (abfd); + if (ret == (struct m68hc11_elf_link_hash_table *) NULL) + return NULL; -static bfd_boolean -elf32_m68hc11_gc_sweep_hook (abfd, info, sec, relocs) - bfd *abfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - asection *sec ATTRIBUTE_UNUSED; - const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; -{ - /* We don't use got and plt entries for 68hc11/68hc12. */ - return TRUE; -} + ret->size_one_stub = m68hc12_elf_size_one_stub; + ret->build_one_stub = m68hc12_elf_build_one_stub; + return &ret->root.root; +} static bfd_boolean m68hc12_elf_set_mach_from_flags (abfd) @@ -659,149 +538,6 @@ m68hc12_elf_set_mach_from_flags (abfd) return TRUE; } -/* Set and control ELF flags in ELF header. */ - -bfd_boolean -_bfd_m68hc12_elf_set_private_flags (abfd, flags) - bfd *abfd; - flagword flags; -{ - BFD_ASSERT (!elf_flags_init (abfd) - || elf_elfheader (abfd)->e_flags == flags); - - elf_elfheader (abfd)->e_flags = flags; - elf_flags_init (abfd) = TRUE; - return m68hc12_elf_set_mach_from_flags (abfd); -} - -/* Merge backend specific data from an object file to the output - object file when linking. */ - -bfd_boolean -_bfd_m68hc12_elf_merge_private_bfd_data (ibfd, obfd) - bfd *ibfd; - bfd *obfd; -{ - flagword old_flags; - flagword new_flags; - bfd_boolean ok = TRUE; - - /* Check if we have the same endianess */ - if (!_bfd_generic_verify_endian_match (ibfd, obfd)) - return FALSE; - - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour - || bfd_get_flavour (obfd) != bfd_target_elf_flavour) - return TRUE; - - new_flags = elf_elfheader (ibfd)->e_flags; - old_flags = elf_elfheader (obfd)->e_flags; - - if (! elf_flags_init (obfd)) - { - elf_flags_init (obfd) = TRUE; - elf_elfheader (obfd)->e_flags = new_flags; - elf_elfheader (obfd)->e_ident[EI_CLASS] - = elf_elfheader (ibfd)->e_ident[EI_CLASS]; - - if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) - && bfd_get_arch_info (obfd)->the_default) - { - if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), - bfd_get_mach (ibfd))) - return FALSE; - } - - return TRUE; - } - - /* Check ABI compatibility. */ - if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) - { - (*_bfd_error_handler) - (_("%s: linking files compiled for 16-bit integers (-mshort) " - "and others for 32-bit integers"), - bfd_archive_filename (ibfd)); - ok = FALSE; - } - if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) - { - (*_bfd_error_handler) - (_("%s: linking files compiled for 32-bit double (-fshort-double) " - "and others for 64-bit double"), - bfd_archive_filename (ibfd)); - ok = FALSE; - } - - /* Processor compatibility. */ - if (!EF_M68HC11_CAN_MERGE_MACH (new_flags, old_flags)) - { - (*_bfd_error_handler) - (_("%s: linking files compiled for HCS12 with " - "others compiled for HC12"), - bfd_archive_filename (ibfd)); - ok = FALSE; - } - new_flags = ((new_flags & ~EF_M68HC11_MACH_MASK) - | (EF_M68HC11_MERGE_MACH (new_flags, old_flags))); - - elf_elfheader (obfd)->e_flags = new_flags; - - /* Warn about any other mismatches */ - new_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); - old_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK); - if (new_flags != old_flags) - { - (*_bfd_error_handler) - (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), - bfd_archive_filename (ibfd), (unsigned long) new_flags, - (unsigned long) old_flags); - ok = FALSE; - } - - if (! ok) - { - bfd_set_error (bfd_error_bad_value); - return FALSE; - } - - return TRUE; -} - -bfd_boolean -_bfd_m68hc12_elf_print_private_bfd_data (abfd, ptr) - bfd *abfd; - PTR ptr; -{ - FILE *file = (FILE *) ptr; - - BFD_ASSERT (abfd != NULL && ptr != NULL); - - /* Print normal ELF private data. */ - _bfd_elf_print_private_bfd_data (abfd, ptr); - - /* xgettext:c-format */ - fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); - - if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) - fprintf (file, _("[abi=32-bit int,")); - else - fprintf (file, _("[abi=16-bit int,")); - - if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) - fprintf (file, _(" 64-bit double,")); - else - fprintf (file, _(" 32-bit double,")); - - if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH) - fprintf (file, _(" cpu=HCS12]")); - else - fprintf (file, _(" cpu=HC12]")); - fputc ('\n', file); - - return TRUE; -} - #define ELF_ARCH bfd_arch_m68hc12 #define ELF_MACHINE_CODE EM_68HC12 #define ELF_MAXPAGESIZE 0x1000 @@ -813,15 +549,22 @@ _bfd_m68hc12_elf_print_private_bfd_data (abfd, ptr) #define elf_info_to_howto_rel m68hc11_info_to_howto_rel #define elf_backend_gc_mark_hook elf32_m68hc11_gc_mark_hook #define elf_backend_gc_sweep_hook elf32_m68hc11_gc_sweep_hook +#define elf_backend_check_relocs elf32_m68hc11_check_relocs +#define elf_backend_relocate_section elf32_m68hc11_relocate_section #define elf_backend_object_p m68hc12_elf_set_mach_from_flags #define elf_backend_final_write_processing 0 -/* Disabled as this backend uses the generic linker. */ -#define elf_backend_can_gc_sections 0 - +#define elf_backend_can_gc_sections 1 +#define elf_backend_post_process_headers elf32_m68hc11_post_process_headers +#define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook + +#define bfd_elf32_bfd_link_hash_table_create \ + m68hc12_elf_bfd_link_hash_table_create +#define bfd_elf32_bfd_link_hash_table_free \ + m68hc11_elf_bfd_link_hash_table_free #define bfd_elf32_bfd_merge_private_bfd_data \ - _bfd_m68hc12_elf_merge_private_bfd_data -#define bfd_elf32_bfd_set_private_flags _bfd_m68hc12_elf_set_private_flags + _bfd_m68hc11_elf_merge_private_bfd_data +#define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags #define bfd_elf32_bfd_print_private_bfd_data \ - _bfd_m68hc12_elf_print_private_bfd_data + _bfd_m68hc11_elf_print_private_bfd_data #include "elf32-target.h" diff --git a/bfd/elf32-m68hc1x.c b/bfd/elf32-m68hc1x.c new file mode 100644 index 00000000000..0696a364251 --- /dev/null +++ b/bfd/elf32-m68hc1x.c @@ -0,0 +1,1508 @@ +/* Motorola 68HC11/HC12-specific support for 32-bit ELF + Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. + Contributed by Stephane Carrez (stcarrez@nerim.fr) + +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 "bfdlink.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf32-m68hc1x.h" +#include "elf/m68hc11.h" +#include "opcode/m68hc11.h" + + +#define m68hc12_stub_hash_lookup(table, string, create, copy) \ + ((struct elf32_m68hc11_stub_hash_entry *) \ + bfd_hash_lookup ((table), (string), (create), (copy))) + +static struct elf32_m68hc11_stub_hash_entry* m68hc12_add_stub + PARAMS((const char *stub_name, + asection *section, + struct m68hc11_elf_link_hash_table *htab)); + +static struct bfd_hash_entry *stub_hash_newfunc + PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); + +static void m68hc11_elf_set_symbol + PARAMS ((bfd* abfd, struct bfd_link_info *info, + const char* name, bfd_vma value, asection* sec)); + +static bfd_boolean m68hc11_elf_export_one_stub + PARAMS((struct bfd_hash_entry *gen_entry, PTR in_arg)); + +static bfd_boolean m68hc11_get_relocation_value + PARAMS ((bfd* abfd, + struct bfd_link_info* info, + asection **local_sections, + Elf_Internal_Sym* local_syms, + Elf_Internal_Rela* rel, + const char** name, + bfd_vma* relocation, + bfd_boolean* is_far)); + +static void scan_sections_for_abi PARAMS ((bfd*, asection*, PTR)); + +struct m68hc11_scan_param +{ + struct m68hc11_page_info* pinfo; + bfd_boolean use_memory_banks; +}; + + +/* Create a 68HC11/68HC12 ELF linker hash table. */ + +struct m68hc11_elf_link_hash_table* +m68hc11_elf_hash_table_create (abfd) + bfd *abfd; +{ + struct m68hc11_elf_link_hash_table *ret; + bfd_size_type amt = sizeof (struct m68hc11_elf_link_hash_table); + + ret = (struct m68hc11_elf_link_hash_table *) bfd_zalloc (abfd, amt); + if (ret == (struct m68hc11_elf_link_hash_table *) NULL) + return NULL; + + if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, + _bfd_elf_link_hash_newfunc)) + { + bfd_release (abfd, ret); + return NULL; + } + + /* Init the stub hash table too. */ + amt = sizeof (struct bfd_hash_table); + ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt); + if (ret->stub_hash_table == NULL) + { + bfd_release (abfd, ret); + return NULL; + } + if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc)) + return NULL; + + ret->stub_bfd = NULL; + ret->stub_section = 0; + ret->add_stub_section = NULL; + ret->sym_sec.abfd = NULL; + + return ret; +} + +/* Free the derived linker hash table. */ + +void +m68hc11_elf_bfd_link_hash_table_free (hash) + struct bfd_link_hash_table *hash; +{ + struct m68hc11_elf_link_hash_table *ret + = (struct m68hc11_elf_link_hash_table *) hash; + + bfd_hash_table_free (ret->stub_hash_table); + free (ret->stub_hash_table); + _bfd_generic_link_hash_table_free (hash); +} + +/* Assorted hash table functions. */ + +/* Initialize an entry in the stub hash table. */ + +static struct bfd_hash_entry * +stub_hash_newfunc (entry, table, string) + struct bfd_hash_entry *entry; + struct bfd_hash_table *table; + const char *string; +{ + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = bfd_hash_allocate (table, + sizeof (struct elf32_m68hc11_stub_hash_entry)); + if (entry == NULL) + return entry; + } + + /* Call the allocation method of the superclass. */ + entry = bfd_hash_newfunc (entry, table, string); + if (entry != NULL) + { + struct elf32_m68hc11_stub_hash_entry *eh; + + /* Initialize the local fields. */ + eh = (struct elf32_m68hc11_stub_hash_entry *) entry; + eh->stub_sec = NULL; + eh->stub_offset = 0; + eh->target_value = 0; + eh->target_section = NULL; + } + + return entry; +} + +/* Add a new stub entry to the stub hash. Not all fields of the new + stub entry are initialised. */ + +static struct elf32_m68hc11_stub_hash_entry * +m68hc12_add_stub (stub_name, section, htab) + const char *stub_name; + asection *section; + struct m68hc11_elf_link_hash_table *htab; +{ + struct elf32_m68hc11_stub_hash_entry *stub_entry; + + /* Enter this entry into the linker stub hash table. */ + stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name, + TRUE, FALSE); + if (stub_entry == NULL) + { + (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), + bfd_archive_filename (section->owner), + stub_name); + return NULL; + } + + if (htab->stub_section == 0) + { + htab->stub_section = (*htab->add_stub_section) (".tramp", + htab->tramp_section); + } + + stub_entry->stub_sec = htab->stub_section; + stub_entry->stub_offset = 0; + return stub_entry; +} + +/* Hook called by the linker routine which adds symbols from an object + file. We use it for identify far symbols and force a loading of + the trampoline handler. */ + +bfd_boolean +elf32_m68hc11_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) + bfd *abfd; + struct bfd_link_info *info; + const Elf_Internal_Sym *sym; + const char **namep ATTRIBUTE_UNUSED; + flagword *flagsp ATTRIBUTE_UNUSED; + asection **secp ATTRIBUTE_UNUSED; + bfd_vma *valp ATTRIBUTE_UNUSED; +{ + if (sym->st_other & STO_M68HC12_FAR) + { + struct elf_link_hash_entry *h; + + h = (struct elf_link_hash_entry *) + bfd_link_hash_lookup (info->hash, "__far_trampoline", + FALSE, FALSE, FALSE); + if (h == NULL) + { + struct bfd_link_hash_entry* entry = NULL; + + _bfd_generic_link_add_one_symbol (info, abfd, + "__far_trampoline", + BSF_GLOBAL, + bfd_und_section_ptr, + (bfd_vma) 0, (const char*) NULL, + FALSE, FALSE, &entry); + } + + } + return TRUE; +} + +/* External entry points for sizing and building linker stubs. */ + +/* Set up various things so that we can make a list of input sections + for each output section included in the link. Returns -1 on error, + 0 when no stubs will be needed, and 1 on success. */ + +int +elf32_m68hc11_setup_section_lists (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + bfd *input_bfd; + unsigned int bfd_count; + int top_id, top_index; + asection *section; + asection **input_list, **list; + bfd_size_type amt; + asection *text_section; + struct m68hc11_elf_link_hash_table *htab; + + htab = m68hc11_elf_hash_table (info); + + if (htab->root.root.creator->flavour != bfd_target_elf_flavour) + return 0; + + /* Count the number of input BFDs and find the top input section id. + Also search for an existing ".tramp" section so that we know + where generated trampolines must go. Default to ".text" if we + can't find it. */ + htab->tramp_section = 0; + text_section = 0; + for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; + input_bfd != NULL; + input_bfd = input_bfd->link_next) + { + bfd_count += 1; + for (section = input_bfd->sections; + section != NULL; + section = section->next) + { + const char* name = bfd_get_section_name (input_bfd, section); + + if (!strcmp (name, ".tramp")) + htab->tramp_section = section; + + if (!strcmp (name, ".text")) + text_section = section; + + if (top_id < section->id) + top_id = section->id; + } + } + htab->bfd_count = bfd_count; + if (htab->tramp_section == 0) + htab->tramp_section = text_section; + + /* We can't use output_bfd->section_count here to find the top output + section index as some sections may have been removed, and + _bfd_strip_section_from_output doesn't renumber the indices. */ + for (section = output_bfd->sections, top_index = 0; + section != NULL; + section = section->next) + { + if (top_index < section->index) + top_index = section->index; + } + + htab->top_index = top_index; + amt = sizeof (asection *) * (top_index + 1); + input_list = (asection **) bfd_malloc (amt); + htab->input_list = input_list; + if (input_list == NULL) + return -1; + + /* For sections we aren't interested in, mark their entries with a + value we can check later. */ + list = input_list + top_index; + do + *list = bfd_abs_section_ptr; + while (list-- != input_list); + + for (section = output_bfd->sections; + section != NULL; + section = section->next) + { + if ((section->flags & SEC_CODE) != 0) + input_list[section->index] = NULL; + } + + return 1; +} + +/* Determine and set the size of the stub section for a final link. + + The basic idea here is to examine all the relocations looking for + PC-relative calls to a target that is unreachable with a "bl" + instruction. */ + +bfd_boolean +elf32_m68hc11_size_stubs (output_bfd, stub_bfd, info, add_stub_section) + bfd *output_bfd; + bfd *stub_bfd; + struct bfd_link_info *info; + asection * (*add_stub_section) PARAMS ((const char *, asection *)); +{ + bfd *input_bfd; + asection *section; + Elf_Internal_Sym *local_syms, **all_local_syms; + unsigned int bfd_indx, bfd_count; + bfd_size_type amt; + asection *stub_sec; + + struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info); + + /* Stash our params away. */ + htab->stub_bfd = stub_bfd; + htab->add_stub_section = add_stub_section; + + /* Count the number of input BFDs and find the top input section id. */ + for (input_bfd = info->input_bfds, bfd_count = 0; + input_bfd != NULL; + input_bfd = input_bfd->link_next) + { + bfd_count += 1; + } + + /* We want to read in symbol extension records only once. To do this + we need to read in the local symbols in parallel and save them for + later use; so hold pointers to the local symbols in an array. */ + amt = sizeof (Elf_Internal_Sym *) * bfd_count; + all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt); + if (all_local_syms == NULL) + return FALSE; + + /* Walk over all the input BFDs, swapping in local symbols. */ + for (input_bfd = info->input_bfds, bfd_indx = 0; + input_bfd != NULL; + input_bfd = input_bfd->link_next, bfd_indx++) + { + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Shdr *shndx_hdr; + Elf_Internal_Sym *isym; + Elf32_External_Sym *extsyms, *esym, *end_sy; + Elf_External_Sym_Shndx *shndx_buf, *shndx; + bfd_size_type sec_size; + + /* We'll need the symbol table in a second. */ + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + if (symtab_hdr->sh_info == 0) + continue; + + /* We need an array of the local symbols attached to the input bfd. + Unfortunately, we're going to have to read & swap them in. */ + sec_size = symtab_hdr->sh_info; + sec_size *= sizeof (Elf_Internal_Sym); + local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size); + if (local_syms == NULL) + goto error_ret_free_local; + + all_local_syms[bfd_indx] = local_syms; + sec_size = symtab_hdr->sh_info; + sec_size *= sizeof (Elf32_External_Sym); + + /* Get the cached copy. */ + if (symtab_hdr->contents != NULL) + extsyms = (Elf32_External_Sym *) symtab_hdr->contents; + else + { + /* Go get them off disk. */ + bfd_size_type amt = symtab_hdr->sh_size; + extsyms = (Elf32_External_Sym *) bfd_malloc (amt); + if (extsyms == NULL) + goto error_ret_free_local; + + if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 + || bfd_bread ((PTR) extsyms, amt, input_bfd) != amt) + { + error_ret_free_ext_syms: + free (extsyms); + goto error_ret_free_local; + } + } + shndx_buf = NULL; + shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr; + if (shndx_hdr->sh_size != 0) + { + bfd_size_type amt; + + amt = symtab_hdr->sh_info * sizeof (Elf_External_Sym_Shndx); + shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); + if (shndx_buf == NULL) + goto error_ret_free_ext_syms; + if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0 + || bfd_bread ((PTR) shndx_buf, amt, input_bfd) != amt) + { + free (shndx_buf); + goto error_ret_free_ext_syms; + } + shndx_hdr->contents = (PTR) shndx_buf; + } + + /* Swap the local symbols in. */ + for (esym = extsyms, end_sy = esym + symtab_hdr->sh_info, + isym = local_syms, shndx = shndx_buf; + esym < end_sy; + esym++, isym++, shndx = (shndx ? shndx + 1 : NULL)) + bfd_elf32_swap_symbol_in (input_bfd, esym, shndx, isym); + + /* Now we can free the external symbols. */ + free (shndx_buf); + } + + for (input_bfd = info->input_bfds, bfd_indx = 0; + input_bfd != NULL; + input_bfd = input_bfd->link_next, bfd_indx++) + { + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Sym *local_syms; + struct elf_link_hash_entry ** sym_hashes; + + sym_hashes = elf_sym_hashes (input_bfd); + + /* We'll need the symbol table in a second. */ + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + if (symtab_hdr->sh_info == 0) + continue; + + local_syms = all_local_syms[bfd_indx]; + + /* Walk over each section attached to the input bfd. */ + for (section = input_bfd->sections; + section != NULL; + section = section->next) + { + Elf_Internal_Rela *internal_relocs, *irelaend, *irela; + + /* If there aren't any relocs, then there's nothing more + to do. */ + if ((section->flags & SEC_RELOC) == 0 + || section->reloc_count == 0) + continue; + + /* If this section is a link-once section that will be + discarded, then don't create any stubs. */ + if (section->output_section == NULL + || section->output_section->owner != output_bfd) + continue; + + /* Get the relocs. */ + internal_relocs + = _bfd_elf32_link_read_relocs (input_bfd, section, NULL, + (Elf_Internal_Rela *) NULL, + info->keep_memory); + if (internal_relocs == NULL) + goto error_ret_free_local; + + /* Now examine each relocation. */ + irela = internal_relocs; + irelaend = irela + section->reloc_count; + for (; irela < irelaend; irela++) + { + unsigned int r_type, r_indx; + struct elf32_m68hc11_stub_hash_entry *stub_entry; + asection *sym_sec; + bfd_vma sym_value; + struct elf_link_hash_entry *hash; + const char *stub_name; + Elf_Internal_Sym *sym; + + r_type = ELF32_R_TYPE (irela->r_info); + + /* Only look at 16-bit relocs. */ + if (r_type != (unsigned int) R_M68HC11_16) + continue; + + /* Now determine the call target, its name, value, + section. */ + r_indx = ELF32_R_SYM (irela->r_info); + if (r_indx < symtab_hdr->sh_info) + { + /* It's a local symbol. */ + Elf_Internal_Shdr *hdr; + bfd_boolean is_far; + + sym = local_syms + r_indx; + hdr = elf_elfsections (input_bfd)[sym->st_shndx]; + sym_sec = hdr->bfd_section; + is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); + if (!is_far) + continue; + stub_name = (bfd_elf_string_from_elf_section + (input_bfd, symtab_hdr->sh_link, + sym->st_name)); + sym_value = sym->st_value; + hash = NULL; + } + else + { + /* It's an external symbol. */ + int e_indx; + + e_indx = r_indx - symtab_hdr->sh_info; + hash = (struct elf_link_hash_entry *) + (sym_hashes[e_indx]); + + while (hash->root.type == bfd_link_hash_indirect + || hash->root.type == bfd_link_hash_warning) + hash = ((struct elf_link_hash_entry *) + hash->root.u.i.link); + + if (hash->root.type == bfd_link_hash_defined + || hash->root.type == bfd_link_hash_defweak) + { + if (!(hash->other & STO_M68HC12_FAR)) + continue; + } + else if (hash->root.type == bfd_link_hash_undefweak) + { + continue; + } + else if (hash->root.type == bfd_link_hash_undefined) + { + continue; + } + else + { + bfd_set_error (bfd_error_bad_value); + goto error_ret_free_internal; + } + sym_sec = hash->root.u.def.section; + sym_value = hash->root.u.def.value; + stub_name = hash->root.root.string; + } + + if (!stub_name) + goto error_ret_free_internal; + + stub_entry = m68hc12_stub_hash_lookup + (htab->stub_hash_table, + stub_name, + FALSE, FALSE); + if (stub_entry == NULL) + { + if (add_stub_section == 0) + continue; + + stub_entry = m68hc12_add_stub (stub_name, section, htab); + if (stub_entry == NULL) + { + error_ret_free_internal: + if (elf_section_data (section)->relocs == NULL) + free (internal_relocs); + goto error_ret_free_local; + } + } + + stub_entry->target_value = sym_value; + stub_entry->target_section = sym_sec; + } + + /* We're done with the internal relocs, free them. */ + if (elf_section_data (section)->relocs == NULL) + free (internal_relocs); + } + } + + if (add_stub_section) + { + /* OK, we've added some stubs. Find out the new size of the + stub sections. */ + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + { + stub_sec->_raw_size = 0; + stub_sec->_cooked_size = 0; + } + + bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab); + } + free (htab->all_local_syms); + return TRUE; + + error_ret_free_local: + free (htab->all_local_syms); + return FALSE; +} + +/* Export the trampoline addresses in the symbol table. */ +static bfd_boolean +m68hc11_elf_export_one_stub (gen_entry, in_arg) + struct bfd_hash_entry *gen_entry; + PTR in_arg; +{ + struct bfd_link_info *info; + struct m68hc11_elf_link_hash_table *htab; + struct elf32_m68hc11_stub_hash_entry *stub_entry; + char* name; + bfd_boolean result; + + info = (struct bfd_link_info *) in_arg; + htab = m68hc11_elf_hash_table (info); + + /* Massage our args to the form they really have. */ + stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; + + /* Generate the trampoline according to HC11 or HC12. */ + result = (* htab->build_one_stub) (gen_entry, in_arg); + + /* Make a printable name that does not conflict with the real function. */ + name = alloca (strlen (stub_entry->root.string) + 16); + sprintf (name, "tramp.%s", stub_entry->root.string); + + /* Export the symbol for debugging/disassembling. */ + m68hc11_elf_set_symbol (htab->stub_bfd, info, name, + stub_entry->stub_offset, + stub_entry->stub_sec); + return result; +} + +/* Export a symbol or set its value and section. */ +static void +m68hc11_elf_set_symbol (abfd, info, name, value, sec) + bfd* abfd; + struct bfd_link_info *info; + const char* name; + bfd_vma value; + asection* sec; +{ + struct elf_link_hash_entry *h; + + h = (struct elf_link_hash_entry *) + bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE); + if (h == NULL) + { + _bfd_generic_link_add_one_symbol (info, abfd, + name, + BSF_GLOBAL, + sec, + value, + (const char*) NULL, + TRUE, FALSE, NULL); + } + else + { + h->root.type = bfd_link_hash_defined; + h->root.u.def.value = value; + h->root.u.def.section = sec; + } +} + + +/* Build all the stubs associated with the current output file. The + stubs are kept in a hash table attached to the main linker hash + table. This function is called via m68hc12elf_finish in the + linker. */ + +bfd_boolean +elf32_m68hc11_build_stubs (abfd, info) + bfd* abfd; + struct bfd_link_info *info; +{ + asection *stub_sec; + struct bfd_hash_table *table; + struct m68hc11_elf_link_hash_table *htab; + struct m68hc11_scan_param param; + + m68hc11_elf_get_bank_parameters (info); + htab = m68hc11_elf_hash_table (info); + + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + { + bfd_size_type size; + + /* Allocate memory to hold the linker stubs. */ + size = stub_sec->_raw_size; + stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); + if (stub_sec->contents == NULL && size != 0) + return FALSE; + stub_sec->_raw_size = 0; + } + + /* Build the stubs as directed by the stub hash table. */ + table = htab->stub_hash_table; + bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info); + + /* Scan the output sections to see if we use the memory banks. + If so, export the symbols that define how the memory banks + are mapped. This is used by gdb and the simulator to obtain + the information. It can be used by programs to burn the eprom + at the good addresses. */ + param.use_memory_banks = FALSE; + param.pinfo = &htab->pinfo; + bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); + if (param.use_memory_banks) + { + m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME, + htab->pinfo.bank_physical, + bfd_abs_section_ptr); + m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME, + htab->pinfo.bank_virtual, + bfd_abs_section_ptr); + m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME, + htab->pinfo.bank_size, + bfd_abs_section_ptr); + } + + return TRUE; +} + +void +m68hc11_elf_get_bank_parameters (info) + struct bfd_link_info *info; +{ + unsigned i; + struct m68hc11_page_info *pinfo; + struct bfd_link_hash_entry *h; + + pinfo = &m68hc11_elf_hash_table (info)->pinfo; + if (pinfo->bank_param_initialized) + return; + + pinfo->bank_virtual = M68HC12_BANK_VIRT; + pinfo->bank_mask = M68HC12_BANK_MASK; + pinfo->bank_physical = M68HC12_BANK_BASE; + pinfo->bank_shift = M68HC12_BANK_SHIFT; + pinfo->bank_size = 1 << M68HC12_BANK_SHIFT; + + h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME, + FALSE, FALSE, TRUE); + if (h != (struct bfd_link_hash_entry*) NULL + && h->type == bfd_link_hash_defined) + pinfo->bank_physical = (h->u.def.value + + h->u.def.section->output_section->vma + + h->u.def.section->output_offset); + + h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME, + FALSE, FALSE, TRUE); + if (h != (struct bfd_link_hash_entry*) NULL + && h->type == bfd_link_hash_defined) + pinfo->bank_virtual = (h->u.def.value + + h->u.def.section->output_section->vma + + h->u.def.section->output_offset); + + h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME, + FALSE, FALSE, TRUE); + if (h != (struct bfd_link_hash_entry*) NULL + && h->type == bfd_link_hash_defined) + pinfo->bank_size = (h->u.def.value + + h->u.def.section->output_section->vma + + h->u.def.section->output_offset); + + pinfo->bank_shift = 0; + for (i = pinfo->bank_size; i != 0; i >>= 1) + pinfo->bank_shift++; + pinfo->bank_shift--; + pinfo->bank_mask = (1 << pinfo->bank_shift) - 1; + pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size; + pinfo->bank_param_initialized = 1; + + h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE, + FALSE, TRUE); + if (h != (struct bfd_link_hash_entry*) NULL + && h->type == bfd_link_hash_defined) + pinfo->trampoline_addr = (h->u.def.value + + h->u.def.section->output_section->vma + + h->u.def.section->output_offset); +} + +/* Return 1 if the address is in banked memory. + This can be applied to a virtual address and to a physical address. */ +int +m68hc11_addr_is_banked (pinfo, addr) + struct m68hc11_page_info *pinfo; + bfd_vma addr; +{ + if (addr >= pinfo->bank_virtual) + return 1; + + if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end) + return 1; + + return 0; +} + +/* Return the physical address seen by the processor, taking + into account banked memory. */ +bfd_vma +m68hc11_phys_addr (pinfo, addr) + struct m68hc11_page_info *pinfo; + bfd_vma addr; +{ + if (addr < pinfo->bank_virtual) + return addr; + + /* Map the address to the memory bank. */ + addr -= pinfo->bank_virtual; + addr &= pinfo->bank_mask; + addr += pinfo->bank_physical; + return addr; +} + +/* Return the page number corresponding to an address in banked memory. */ +bfd_vma +m68hc11_phys_page (pinfo, addr) + struct m68hc11_page_info *pinfo; + bfd_vma addr; +{ + if (addr < pinfo->bank_virtual) + return 0; + + /* Map the address to the memory bank. */ + addr -= pinfo->bank_virtual; + addr >>= pinfo->bank_shift; + addr &= 0x0ff; + return addr; +} + +/* This function is used for relocs which are only used for relaxing, + which the linker should otherwise ignore. */ + +bfd_reloc_status_type +m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *reloc_entry; + asymbol *symbol ATTRIBUTE_UNUSED; + PTR data ATTRIBUTE_UNUSED; + asection *input_section; + bfd *output_bfd; + char **error_message ATTRIBUTE_UNUSED; +{ + if (output_bfd != NULL) + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; +} + +bfd_reloc_status_type +m68hc11_elf_special_reloc (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *reloc_entry; + asymbol *symbol; + PTR data ATTRIBUTE_UNUSED; + asection *input_section; + bfd *output_bfd; + char **error_message ATTRIBUTE_UNUSED; +{ + if (output_bfd != (bfd *) NULL + && (symbol->flags & BSF_SECTION_SYM) == 0 + && (! reloc_entry->howto->partial_inplace + || reloc_entry->addend == 0)) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + if (output_bfd != NULL) + return bfd_reloc_continue; + + if (reloc_entry->address > input_section->_cooked_size) + return bfd_reloc_outofrange; + + abort(); +} + +asection * +elf32_m68hc11_gc_mark_hook (sec, info, rel, h, sym) + asection *sec; + struct bfd_link_info *info ATTRIBUTE_UNUSED; + Elf_Internal_Rela *rel; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; +{ + if (h != NULL) + { + switch (ELF32_R_TYPE (rel->r_info)) + { + default: + 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 + return bfd_section_from_elf_index (sec->owner, sym->st_shndx); + + return NULL; +} + +bfd_boolean +elf32_m68hc11_gc_sweep_hook (abfd, info, sec, relocs) + bfd *abfd ATTRIBUTE_UNUSED; + struct bfd_link_info *info ATTRIBUTE_UNUSED; + asection *sec ATTRIBUTE_UNUSED; + const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; +{ + /* We don't use got and plt entries for 68hc11/68hc12. */ + 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. */ + +bfd_boolean +elf32_m68hc11_check_relocs (abfd, info, sec, 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->relocateable) + 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]; + + switch (ELF32_R_TYPE (rel->r_info)) + { + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_M68HC11_GNU_VTINHERIT: + if (!_bfd_elf32_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_M68HC11_GNU_VTENTRY: + if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; + } + } + + return TRUE; +} + +static bfd_boolean +m68hc11_get_relocation_value (abfd, info, local_sections, local_syms, + rel, name, + relocation, is_far) + bfd *abfd; + struct bfd_link_info *info; + asection **local_sections; + Elf_Internal_Sym* local_syms; + Elf_Internal_Rela* rel; + const char** name; + bfd_vma* relocation; + bfd_boolean* is_far; +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + unsigned long r_symndx; + asection *sec; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + const char* stub_name = 0; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + + r_symndx = ELF32_R_SYM (rel->r_info); + + /* This is a final link. */ + 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); + *is_far = (sym && (sym->st_other & STO_M68HC12_FAR)); + if (*is_far) + stub_name = (bfd_elf_string_from_elf_section + (abfd, symtab_hdr->sh_link, + sym->st_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; + 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, abfd, + sec, rel->r_offset, TRUE))) + return FALSE; + *relocation = 0; + } + *is_far = (h && (h->other & STO_M68HC12_FAR)); + stub_name = h->root.root.string; + } + + if (h != NULL) + *name = h->root.root.string; + else + { + *name = (bfd_elf_string_from_elf_section + (abfd, symtab_hdr->sh_link, sym->st_name)); + if (*name == NULL || **name == '\0') + *name = bfd_section_name (input_bfd, sec); + } + + if (*is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16) + { + struct elf32_m68hc11_stub_hash_entry* stub; + struct m68hc11_elf_link_hash_table *htab; + + htab = m68hc11_elf_hash_table (info); + stub = m68hc12_stub_hash_lookup (htab->stub_hash_table, + *name, FALSE, FALSE); + if (stub) + { + *relocation = stub->stub_offset + + stub->stub_sec->output_section->vma + + stub->stub_sec->output_offset; + *is_far = FALSE; + } + } + return TRUE; +} + +/* Relocate a 68hc11/68hc12 ELF section. */ +bfd_boolean +elf32_m68hc11_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, *relend; + const char *name; + struct m68hc11_page_info *pinfo; + struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd); + + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + + /* Get memory bank parameters. */ + m68hc11_elf_get_bank_parameters (info); + pinfo = &m68hc11_elf_hash_table (info)->pinfo; + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + int r_type; + arelent arel; + reloc_howto_type *howto; + unsigned long r_symndx; + Elf_Internal_Sym *sym; + asection *sec; + bfd_vma relocation; + bfd_reloc_status_type r = bfd_reloc_undefined; + bfd_vma phys_page; + bfd_vma phys_addr; + bfd_vma insn_addr; + bfd_vma insn_page; + bfd_boolean is_far; + + r_symndx = ELF32_R_SYM (rel->r_info); + r_type = ELF32_R_TYPE (rel->r_info); + + if (r_type == R_M68HC11_GNU_VTENTRY + || r_type == R_M68HC11_GNU_VTINHERIT ) + continue; + + 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; + } + (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel); + howto = arel.howto; + + m68hc11_get_relocation_value (input_bfd, info, + local_sections, local_syms, + rel, &name, &relocation, &is_far); + + /* Do the memory bank mapping. */ + phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend); + phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend); + switch (r_type) + { + case R_M68HC11_24: + /* Reloc used by 68HC12 call instruction. */ + bfd_put_16 (input_bfd, phys_addr, + (bfd_byte*) contents + rel->r_offset); + bfd_put_8 (input_bfd, phys_page, + (bfd_byte*) contents + rel->r_offset + 2); + r = bfd_reloc_ok; + r_type = R_M68HC11_NONE; + break; + + case R_M68HC11_NONE: + r = bfd_reloc_ok; + break; + + case R_M68HC11_LO16: + /* Reloc generated by %addr(expr) gas to obtain the + address as mapped in the memory bank window. */ + relocation = phys_addr; + break; + + case R_M68HC11_PAGE: + /* Reloc generated by %page(expr) gas to obtain the + page number associated with the address. */ + relocation = phys_page; + break; + + case R_M68HC11_16: + /* Get virtual address of instruction having the relocation. */ + if (is_far) + { + const char* msg; + char* buf; + msg = _("Reference to the far symbol `%s' using a wrong " + "relocation may result in incorrect execution"); + buf = alloca (strlen (msg) + strlen (name) + 10); + sprintf (buf, msg, name); + + (* info->callbacks->warning) + (info, buf, name, input_bfd, NULL, rel->r_offset); + } + + /* Get virtual address of instruction having the relocation. */ + insn_addr = input_section->output_section->vma + + input_section->output_offset + + rel->r_offset; + + insn_page = m68hc11_phys_page (pinfo, insn_addr); + + if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend) + && m68hc11_addr_is_banked (pinfo, insn_addr) + && phys_page != insn_page) + { + const char* msg; + char* buf; + + msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank " + "as current banked address [%lx:%04lx] (%lx)"); + + buf = alloca (strlen (msg) + 128); + sprintf (buf, msg, phys_page, phys_addr, + (long) (relocation + rel->r_addend), + insn_page, m68hc11_phys_addr (pinfo, insn_addr), + (long) (insn_addr)); + if (!((*info->callbacks->warning) + (info, buf, name, input_bfd, input_section, + rel->r_offset))) + return FALSE; + break; + } + if (phys_page != 0 && insn_page == 0) + { + const char* msg; + char* buf; + + msg = _("reference to a banked address [%lx:%04lx] in the " + "normal address space at %04lx"); + + buf = alloca (strlen (msg) + 128); + sprintf (buf, msg, phys_page, phys_addr, insn_addr); + if (!((*info->callbacks->warning) + (info, buf, name, input_bfd, input_section, + insn_addr))) + return FALSE; + + relocation = phys_addr; + break; + } + + /* If this is a banked address use the phys_addr so that + we stay in the banked window. */ + if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)) + relocation = phys_addr; + break; + } + if (r_type != R_M68HC11_NONE) + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, rel->r_addend); + + if (r != bfd_reloc_ok) + { + const char * msg = (const char *) 0; + + switch (r) + { + case bfd_reloc_overflow: + if (!((*info->callbacks->reloc_overflow) + (info, name, howto->name, (bfd_vma) 0, + input_bfd, input_section, rel->r_offset))) + return FALSE; + break; + + case bfd_reloc_undefined: + if (!((*info->callbacks->undefined_symbol) + (info, name, input_bfd, input_section, + rel->r_offset, TRUE))) + return FALSE; + break; + + case bfd_reloc_outofrange: + msg = _ ("internal error: out of range error"); + goto common_error; + + case bfd_reloc_notsupported: + msg = _ ("internal error: unsupported relocation error"); + goto common_error; + + case bfd_reloc_dangerous: + msg = _ ("internal error: dangerous error"); + goto common_error; + + default: + msg = _ ("internal error: unknown error"); + /* fall through */ + + common_error: + if (!((*info->callbacks->warning) + (info, msg, name, input_bfd, input_section, + rel->r_offset))) + return FALSE; + break; + } + } + } + + return TRUE; +} + + + +/* Set and control ELF flags in ELF header. */ + +bfd_boolean +_bfd_m68hc11_elf_set_private_flags (abfd, flags) + bfd *abfd; + flagword flags; +{ + BFD_ASSERT (!elf_flags_init (abfd) + || elf_elfheader (abfd)->e_flags == flags); + + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = TRUE; + return TRUE; +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ + +bfd_boolean +_bfd_m68hc11_elf_merge_private_bfd_data (ibfd, obfd) + bfd *ibfd; + bfd *obfd; +{ + flagword old_flags; + flagword new_flags; + bfd_boolean ok = TRUE; + + /* Check if we have the same endianess */ + if (!_bfd_generic_verify_endian_match (ibfd, obfd)) + return FALSE; + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return TRUE; + + new_flags = elf_elfheader (ibfd)->e_flags; + elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI; + old_flags = elf_elfheader (obfd)->e_flags; + + if (! elf_flags_init (obfd)) + { + elf_flags_init (obfd) = TRUE; + elf_elfheader (obfd)->e_flags = new_flags; + elf_elfheader (obfd)->e_ident[EI_CLASS] + = elf_elfheader (ibfd)->e_ident[EI_CLASS]; + + if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) + && bfd_get_arch_info (obfd)->the_default) + { + if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), + bfd_get_mach (ibfd))) + return FALSE; + } + + return TRUE; + } + + /* Check ABI compatibility. */ + if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32)) + { + (*_bfd_error_handler) + (_("%s: linking files compiled for 16-bit integers (-mshort) " + "and others for 32-bit integers"), + bfd_archive_filename (ibfd)); + ok = FALSE; + } + if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64)) + { + (*_bfd_error_handler) + (_("%s: linking files compiled for 32-bit double (-fshort-double) " + "and others for 64-bit double"), + bfd_archive_filename (ibfd)); + ok = FALSE; + } + new_flags &= ~EF_M68HC11_ABI; + old_flags &= ~EF_M68HC11_ABI; + + /* Warn about any other mismatches */ + if (new_flags != old_flags) + { + (*_bfd_error_handler) + (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), + bfd_archive_filename (ibfd), (unsigned long) new_flags, + (unsigned long) old_flags); + ok = FALSE; + } + + if (! ok) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + return TRUE; +} + +bfd_boolean +_bfd_m68hc11_elf_print_private_bfd_data (abfd, ptr) + bfd *abfd; + PTR ptr; +{ + FILE *file = (FILE *) ptr; + + BFD_ASSERT (abfd != NULL && ptr != NULL); + + /* Print normal ELF private data. */ + _bfd_elf_print_private_bfd_data (abfd, ptr); + + /* xgettext:c-format */ + fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); + + if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32) + fprintf (file, _("[abi=32-bit int, ")); + else + fprintf (file, _("[abi=16-bit int, ")); + + if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64) + fprintf (file, _("64-bit double, ")); + else + fprintf (file, _("32-bit double, ")); + + if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0) + fprintf (file, _("cpu=HC11]")); + else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH) + fprintf (file, _("cpu=HCS12]")); + else + fprintf (file, _("cpu=HC12]")); + + if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS) + fprintf (file, _(" [memory=bank-model]")); + else + fprintf (file, _(" [memory=flat]")); + + fputc ('\n', file); + + return TRUE; +} + +static void scan_sections_for_abi (abfd, asect, arg) + bfd* abfd ATTRIBUTE_UNUSED; + asection* asect; + PTR arg; +{ + struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg; + + if (asect->vma >= p->pinfo->bank_virtual) + p->use_memory_banks = TRUE; +} + +/* Tweak the OSABI field of the elf header. */ + +void +elf32_m68hc11_post_process_headers (abfd, link_info) + bfd *abfd; + struct bfd_link_info *link_info; +{ + struct m68hc11_scan_param param; + + if (link_info == 0) + return; + + m68hc11_elf_get_bank_parameters (link_info); + + param.use_memory_banks = FALSE; + param.pinfo = &m68hc11_elf_hash_table (link_info)->pinfo; + bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m); + if (param.use_memory_banks) + { + Elf_Internal_Ehdr * i_ehdrp; + + i_ehdrp = elf_elfheader (abfd); + i_ehdrp->e_flags |= E_M68HC12_BANKS; + } +} + diff --git a/bfd/elf32-m68hc1x.h b/bfd/elf32-m68hc1x.h new file mode 100644 index 00000000000..e70c172c37d --- /dev/null +++ b/bfd/elf32-m68hc1x.h @@ -0,0 +1,205 @@ +/* Motorola 68HC11/68HC12-specific support for 32-bit ELF + Copyright 2003 Free Software Foundation, Inc. + Contributed by Stephane Carrez (stcarrez@nerim.fr) + +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. */ + +#ifndef _ELF32_M68HC1X_H +#define _ELF32_M68HC1X_H + +#include "elf-bfd.h" +#include "bfdlink.h" +#include "elf/m68hc11.h" + +/* Name of symbols exported by HC11/HC12 linker when there is a memory + bank window. */ +#define BFD_M68HC11_BANK_START_NAME "__bank_start" +#define BFD_M68HC11_BANK_SIZE_NAME "__bank_size" +#define BFD_M68HC11_BANK_VIRTUAL_NAME "__bank_virtual" + +/* Set and control ELF flags in ELF header. */ +extern bfd_boolean _bfd_m68hc11_elf_merge_private_bfd_data PARAMS ((bfd*,bfd*)); +extern bfd_boolean _bfd_m68hc11_elf_set_private_flags PARAMS ((bfd*,flagword)); +extern bfd_boolean _bfd_m68hc11_elf_print_private_bfd_data PARAMS ((bfd*,PTR)); + +/* This hash entry is used to record a trampoline that must be generated + to call a far function using a normal calling convention ('jsr'). + The trampoline is used when a pointer to a far function is used. + It takes care of installing the proper memory bank as well as creating + the 'call/rtc' calling convention. */ +struct elf32_m68hc11_stub_hash_entry { + + /* Base hash table entry structure. */ + struct bfd_hash_entry root; + + /* The stub section. */ + asection *stub_sec; + + /* Offset within stub_sec of the beginning of this stub. */ + bfd_vma stub_offset; + + /* Given the symbol's value and its section we can determine its final + value when building the stubs (so the stub knows where to jump. */ + bfd_vma target_value; + asection *target_section; +}; + +/* Placeholder for the parameters to compute memory page and physical address. + The following formulas are used: + + sym > bank_virtual => + %addr(sym) = (((sym - bank_virtual) & bank_mask) + bank_physical + %page(sym) = (((sym - bank_virtual) >> bank_shift) % 256 + + sym < bank_virtual => + %addr(sym) = sym + %page(sym) = 0 + + + These parameters are obtained from the symbol table by looking + at the following: + + __bank_start Symbol marking the start of memory bank window + (bank_physical) + __bank_virtual Logical address of symbols for which the transformation + must be computed + __bank_page_size Size in bytes of page size (this is *NOT* the memory + bank window size and the window size is always + less or equal to the page size) + + For 68HC12, the window is at 0x8000 and the page size is 16K (full window). + For 68HC11 this is board specific (implemented by external hardware). + +*/ +struct m68hc11_page_info +{ + bfd_vma bank_virtual; + bfd_vma bank_physical; + bfd_vma bank_physical_end; + bfd_vma bank_mask; + bfd_vma bank_size; + int bank_shift; + int bank_param_initialized; + bfd_vma trampoline_addr; +}; + +struct m68hc11_elf_link_hash_table +{ + struct elf_link_hash_table root; + struct m68hc11_page_info pinfo; + + /* The stub hash table. */ + struct bfd_hash_table* stub_hash_table; + + /* Linker stub bfd. */ + bfd *stub_bfd; + + asection* stub_section; + asection* tramp_section; + + /* Linker call-backs. */ + asection * (*add_stub_section) PARAMS ((const char *, asection *)); + + /* Assorted information used by elf32_hppa_size_stubs. */ + unsigned int bfd_count; + int top_index; + asection **input_list; + Elf_Internal_Sym **all_local_syms; + + /* Small local sym to section mapping cache. */ + struct sym_sec_cache sym_sec; + + bfd_boolean (* size_one_stub) PARAMS((struct bfd_hash_entry*, PTR)); + bfd_boolean (* build_one_stub) PARAMS((struct bfd_hash_entry*, PTR)); +}; + +/* Get the Sparc64 ELF linker hash table from a link_info structure. */ + +#define m68hc11_elf_hash_table(p) \ + ((struct m68hc11_elf_link_hash_table *) ((p)->hash)) + +/* Create a 68HC11/68HC12 ELF linker hash table. */ + +extern struct m68hc11_elf_link_hash_table* m68hc11_elf_hash_table_create + PARAMS ((bfd*)); +extern void m68hc11_elf_bfd_link_hash_table_free + PARAMS ((struct bfd_link_hash_table*)); + +extern void m68hc11_elf_get_bank_parameters + PARAMS ((struct bfd_link_info*)); + +/* Return 1 if the address is in banked memory. + This can be applied to a virtual address and to a physical address. */ +extern int m68hc11_addr_is_banked + PARAMS ((struct m68hc11_page_info*, bfd_vma)); + +/* Return the physical address seen by the processor, taking + into account banked memory. */ +extern bfd_vma m68hc11_phys_addr + PARAMS ((struct m68hc11_page_info*, bfd_vma)); + +/* Return the page number corresponding to an address in banked memory. */ +extern bfd_vma m68hc11_phys_page + PARAMS ((struct m68hc11_page_info*, bfd_vma)); + +bfd_reloc_status_type m68hc11_elf_ignore_reloc + PARAMS ((bfd *abfd, arelent *reloc_entry, + asymbol *symbol, PTR data, asection *input_section, + bfd *output_bfd, char **error_message)); +bfd_reloc_status_type m68hc11_elf_special_reloc + PARAMS ((bfd *abfd, arelent *reloc_entry, + asymbol *symbol, PTR data, asection *input_section, + bfd *output_bfd, char **error_message)); + +/* GC mark and sweep. */ +asection *elf32_m68hc11_gc_mark_hook + PARAMS ((asection *sec, struct bfd_link_info *info, + Elf_Internal_Rela *rel, struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym)); +bfd_boolean elf32_m68hc11_gc_sweep_hook + PARAMS ((bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs)); +bfd_boolean elf32_m68hc11_check_relocs + PARAMS ((bfd * abfd, struct bfd_link_info * info, + asection * sec, const Elf_Internal_Rela * relocs)); +bfd_boolean elf32_m68hc11_relocate_section + PARAMS ((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_boolean elf32_m68hc11_add_symbol_hook + PARAMS ((bfd *abfd, struct bfd_link_info *info, + const Elf_Internal_Sym *sym, const char **namep, + flagword *flagsp, asection **secp, + bfd_vma *valp)); + +/* Tweak the OSABI field of the elf header. */ + +extern void elf32_m68hc11_post_process_headers + PARAMS ((bfd*, struct bfd_link_info*)); + +int elf32_m68hc11_setup_section_lists + PARAMS ((bfd *, struct bfd_link_info *)); + +bfd_boolean elf32_m68hc11_size_stubs + PARAMS ((bfd *, bfd *, struct bfd_link_info *, + asection * (*) PARAMS ((const char *, asection *)))); + +bfd_boolean elf32_m68hc11_build_stubs + PARAMS ((bfd* abfd, struct bfd_link_info *)); +#endif -- 2.39.2