diff options
Diffstat (limited to 'bfd/elf-m10300.c')
| -rw-r--r-- | bfd/elf-m10300.c | 2986 |
1 files changed, 0 insertions, 2986 deletions
diff --git a/bfd/elf-m10300.c b/bfd/elf-m10300.c deleted file mode 100644 index 15380bc64ad..00000000000 --- a/bfd/elf-m10300.c +++ /dev/null @@ -1,2986 +0,0 @@ -/* Matsushita 10300 specific support for 32-bit ELF - Copyright 1996, 1997, 1998, 1999, 2000, 2001 - Free Software Foundation, Inc. - -This file is part of BFD, the Binary File Descriptor library. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf/mn10300.h" - -struct elf32_mn10300_link_hash_entry { - /* The basic elf link hash table entry. */ - struct elf_link_hash_entry root; - - /* For function symbols, the number of times this function is - called directly (ie by name). */ - unsigned int direct_calls; - - /* For function symbols, the size of this function's stack - (if <= 255 bytes). We stuff this into "call" instructions - to this target when it's valid and profitable to do so. - - This does not include stack allocated by movm! */ - unsigned char stack_size; - - /* For function symbols, arguments (if any) for movm instruction - in the prologue. We stuff this value into "call" instructions - to the target when it's valid and profitable to do so. */ - unsigned char movm_args; - - /* For funtion symbols, the amount of stack space that would be allocated - by the movm instruction. This is redundant with movm_args, but we - add it to the hash table to avoid computing it over and over. */ - unsigned char movm_stack_size; - -/* When set, convert all "call" instructions to this target into "calls" - instructions. */ -#define MN10300_CONVERT_CALL_TO_CALLS 0x1 - -/* Used to mark functions which have had redundant parts of their - prologue deleted. */ -#define MN10300_DELETED_PROLOGUE_BYTES 0x2 - unsigned char flags; -}; - -/* We derive a hash table from the main elf linker hash table so - we can store state variables and a secondary hash table without - resorting to global variables. */ -struct elf32_mn10300_link_hash_table { - /* The main hash table. */ - struct elf_link_hash_table root; - - /* A hash table for static functions. We could derive a new hash table - instead of using the full elf32_mn10300_link_hash_table if we wanted - to save some memory. */ - struct elf32_mn10300_link_hash_table *static_hash_table; - - /* Random linker state flags. */ -#define MN10300_HASH_ENTRIES_INITIALIZED 0x1 - char flags; -}; - -/* For MN10300 linker hash table. */ - -/* Get the MN10300 ELF linker hash table from a link_info structure. */ - -#define elf32_mn10300_hash_table(p) \ - ((struct elf32_mn10300_link_hash_table *) ((p)->hash)) - -#define elf32_mn10300_link_hash_traverse(table, func, info) \ - (elf_link_hash_traverse \ - (&(table)->root, \ - (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ - (info))) - -static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc - PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); -static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create - PARAMS ((bfd *)); - -static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup - PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); -static void mn10300_info_to_howto - PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); -static boolean mn10300_elf_check_relocs - PARAMS ((bfd *, struct bfd_link_info *, asection *, - const Elf_Internal_Rela *)); -static asection *mn10300_elf_gc_mark_hook - PARAMS ((bfd *, struct bfd_link_info *info, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); -static boolean mn10300_elf_relax_delete_bytes - PARAMS ((bfd *, asection *, bfd_vma, int)); -static boolean mn10300_elf_symbol_address_p - PARAMS ((bfd *, asection *, Elf32_External_Sym *, bfd_vma)); -static boolean elf32_mn10300_finish_hash_table_entry - PARAMS ((struct bfd_hash_entry *, PTR)); -static void compute_function_info - PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *, - bfd_vma, unsigned char *)); - -/* We have to use RELA instructions since md_apply_fix3 in the assembler - does absolutely nothing. */ -#define USE_RELA - -static reloc_howto_type elf_mn10300_howto_table[] = { - /* Dummy relocation. Does nothing. */ - HOWTO (R_MN10300_NONE, - 0, - 2, - 16, - false, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10300_NONE", - false, - 0, - 0, - false), - /* Standard 32 bit reloc. */ - HOWTO (R_MN10300_32, - 0, - 2, - 32, - false, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10300_32", - false, - 0xffffffff, - 0xffffffff, - false), - /* Standard 16 bit reloc. */ - HOWTO (R_MN10300_16, - 0, - 1, - 16, - false, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10300_16", - false, - 0xffff, - 0xffff, - false), - /* Standard 8 bit reloc. */ - HOWTO (R_MN10300_8, - 0, - 0, - 8, - false, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10300_8", - false, - 0xff, - 0xff, - false), - /* Standard 32bit pc-relative reloc. */ - HOWTO (R_MN10300_PCREL32, - 0, - 2, - 32, - true, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10300_PCREL32", - false, - 0xffffffff, - 0xffffffff, - true), - /* Standard 16bit pc-relative reloc. */ - HOWTO (R_MN10300_PCREL16, - 0, - 1, - 16, - true, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10300_PCREL16", - false, - 0xffff, - 0xffff, - true), - /* Standard 8 pc-relative reloc. */ - HOWTO (R_MN10300_PCREL8, - 0, - 0, - 8, - true, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10300_PCREL8", - false, - 0xff, - 0xff, - true), - - /* GNU extension to record C++ vtable hierarchy */ - HOWTO (R_MN10300_GNU_VTINHERIT, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - NULL, /* special_function */ - "R_MN10300_GNU_VTINHERIT", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - /* GNU extension to record C++ vtable member usage */ - HOWTO (R_MN10300_GNU_VTENTRY, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - NULL, /* special_function */ - "R_MN10300_GNU_VTENTRY", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - /* Standard 24 bit reloc. */ - HOWTO (R_MN10300_24, - 0, - 2, - 24, - false, - 0, - complain_overflow_bitfield, - bfd_elf_generic_reloc, - "R_MN10300_24", - false, - 0xffffff, - 0xffffff, - false), -}; - -struct mn10300_reloc_map { - bfd_reloc_code_real_type bfd_reloc_val; - unsigned char elf_reloc_val; -}; - -static const struct mn10300_reloc_map mn10300_reloc_map[] = { - { BFD_RELOC_NONE, R_MN10300_NONE, }, - { BFD_RELOC_32, R_MN10300_32, }, - { BFD_RELOC_16, R_MN10300_16, }, - { BFD_RELOC_8, R_MN10300_8, }, - { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, }, - { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, }, - { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, }, - { BFD_RELOC_24, R_MN10300_24, }, - { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT }, - { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY }, -}; - -static reloc_howto_type * -bfd_elf32_bfd_reloc_type_lookup (abfd, code) - bfd *abfd ATTRIBUTE_UNUSED; - bfd_reloc_code_real_type code; -{ - unsigned int i; - - for (i = 0; - i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map); - i++) - { - if (mn10300_reloc_map[i].bfd_reloc_val == code) - return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val]; - } - - return NULL; -} - -/* Set the howto pointer for an MN10300 ELF reloc. */ - -static void -mn10300_info_to_howto (abfd, cache_ptr, dst) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *cache_ptr; - Elf32_Internal_Rela *dst; -{ - unsigned int r_type; - - r_type = ELF32_R_TYPE (dst->r_info); - BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX); - cache_ptr->howto = &elf_mn10300_howto_table[r_type]; -} - -/* 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 boolean -mn10300_elf_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, **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_MN10300_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_MN10300_GNU_VTENTRY: - if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) - return false; - break; - } - } - - return true; -} - -/* Return the section that should be marked against GC for a given - relocation. */ - -static asection * -mn10300_elf_gc_mark_hook (abfd, info, rel, h, sym) - bfd *abfd; - 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)) - { - case R_MN10300_GNU_VTINHERIT: - case R_MN10300_GNU_VTENTRY: - break; - - 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 - { - if (!(elf_bad_symtab (abfd) - && ELF_ST_BIND (sym->st_info) != STB_LOCAL) - && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) - && sym->st_shndx != SHN_COMMON)) - { - return bfd_section_from_elf_index (abfd, sym->st_shndx); - } - } - - return NULL; -} - -/* Perform a relocation as part of a final link. */ -static bfd_reloc_status_type -mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, - input_section, contents, offset, value, - addend, info, sym_sec, is_local) - reloc_howto_type *howto; - bfd *input_bfd; - bfd *output_bfd ATTRIBUTE_UNUSED; - asection *input_section; - bfd_byte *contents; - bfd_vma offset; - bfd_vma value; - bfd_vma addend; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - asection *sym_sec ATTRIBUTE_UNUSED; - int is_local ATTRIBUTE_UNUSED; -{ - unsigned long r_type = howto->type; - bfd_byte *hit_data = contents + offset; - - switch (r_type) - { - case R_MN10300_NONE: - return bfd_reloc_ok; - - case R_MN10300_32: - value += addend; - bfd_put_32 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10300_24: - value += addend; - - if ((long) value > 0x7fffff || (long) value < -0x800000) - return bfd_reloc_overflow; - - bfd_put_8 (input_bfd, value & 0xff, hit_data); - bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); - bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); - return bfd_reloc_ok; - - case R_MN10300_16: - value += addend; - - if ((long) value > 0x7fff || (long) value < -0x8000) - return bfd_reloc_overflow; - - bfd_put_16 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10300_8: - value += addend; - - if ((long) value > 0x7f || (long) value < -0x80) - return bfd_reloc_overflow; - - bfd_put_8 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10300_PCREL8: - value -= (input_section->output_section->vma - + input_section->output_offset); - value -= offset; - value += addend; - - if ((long) value > 0xff || (long) value < -0x100) - return bfd_reloc_overflow; - - bfd_put_8 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10300_PCREL16: - value -= (input_section->output_section->vma - + input_section->output_offset); - value -= offset; - value += addend; - - if ((long) value > 0xffff || (long) value < -0x10000) - return bfd_reloc_overflow; - - bfd_put_16 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10300_PCREL32: - value -= (input_section->output_section->vma - + input_section->output_offset); - value -= offset; - value += addend; - - bfd_put_32 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_MN10300_GNU_VTINHERIT: - case R_MN10300_GNU_VTENTRY: - return bfd_reloc_ok; - - default: - return bfd_reloc_notsupported; - } -} - -/* Relocate an MN10300 ELF section. */ -static boolean -mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section, - contents, relocs, local_syms, local_sections) - bfd *output_bfd; - struct bfd_link_info *info; - bfd *input_bfd; - asection *input_section; - bfd_byte *contents; - Elf_Internal_Rela *relocs; - Elf_Internal_Sym *local_syms; - asection **local_sections; -{ - Elf_Internal_Shdr *symtab_hdr; - struct elf32_mn10300_link_hash_entry **sym_hashes; - Elf_Internal_Rela *rel, *relend; - - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - sym_hashes = (struct elf32_mn10300_link_hash_entry **) - (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 elf32_mn10300_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); - howto = elf_mn10300_howto_table + r_type; - - /* Just skip the vtable gc relocs. */ - if (r_type == R_MN10300_GNU_VTINHERIT - || r_type == R_MN10300_GNU_VTENTRY) - 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; - } - - /* 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 elf32_mn10300_link_hash_entry *) h->root.root.u.i.link; - if (h->root.root.type == bfd_link_hash_defined - || h->root.root.type == bfd_link_hash_defweak) - { - sec = h->root.root.u.def.section; - relocation = (h->root.root.u.def.value - + sec->output_section->vma - + sec->output_offset); - } - else if (h->root.root.type == bfd_link_hash_undefweak) - relocation = 0; - else - { - if (! ((*info->callbacks->undefined_symbol) - (info, h->root.root.root.string, input_bfd, - input_section, rel->r_offset, true))) - return false; - relocation = 0; - } - } - - r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, - input_section, - contents, rel->r_offset, - relocation, rel->r_addend, - info, sec, h == NULL); - - if (r != bfd_reloc_ok) - { - const char *name; - const char *msg = (const char *) 0; - - if (h != NULL) - name = h->root.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); - } - - 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; -} - -/* Finish initializing one hash table entry. */ -static boolean -elf32_mn10300_finish_hash_table_entry (gen_entry, in_args) - struct bfd_hash_entry *gen_entry; - PTR in_args ATTRIBUTE_UNUSED; -{ - struct elf32_mn10300_link_hash_entry *entry; - unsigned int byte_count = 0; - - entry = (struct elf32_mn10300_link_hash_entry *) gen_entry; - - /* If we already know we want to convert "call" to "calls" for calls - to this symbol, then return now. */ - if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS) - return true; - - /* If there are no named calls to this symbol, or there's nothing we - can move from the function itself into the "call" instruction, then - note that all "call" instructions should be converted into "calls" - instructions and return. */ - if (entry->direct_calls == 0 - || (entry->stack_size == 0 && entry->movm_args == 0)) - { - /* Make a note that we should convert "call" instructions to "calls" - instructions for calls to this symbol. */ - entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; - return true; - } - - /* We may be able to move some instructions from the function itself into - the "call" instruction. Count how many bytes we might be able to - eliminate in the function itself. */ - - /* A movm instruction is two bytes. */ - if (entry->movm_args) - byte_count += 2; - - /* Count the insn to allocate stack space too. */ - if (entry->stack_size > 0 && entry->stack_size <= 128) - byte_count += 3; - else if (entry->stack_size > 0 && entry->stack_size < 256) - byte_count += 4; - - /* If using "call" will result in larger code, then turn all - the associated "call" instructions into "calls" instrutions. */ - if (byte_count < entry->direct_calls) - entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; - - /* This routine never fails. */ - return true; -} - -/* This function handles relaxing for the mn10300. - - There's quite a few relaxing opportunites available on the mn10300: - - * calls:32 -> calls:16 2 bytes - * call:32 -> call:16 2 bytes - - * call:32 -> calls:32 1 byte - * call:16 -> calls:16 1 byte - * These are done anytime using "calls" would result - in smaller code, or when necessary to preserve the - meaning of the program. - - * call:32 varies - * call:16 - * In some circumstances we can move instructions - from a function prologue into a "call" instruction. - This is only done if the resulting code is no larger - than the original code. - - * jmp:32 -> jmp:16 2 bytes - * jmp:16 -> bra:8 1 byte - - * If the previous instruction is a conditional branch - around the jump/bra, we may be able to reverse its condition - and change its target to the jump's target. The jump/bra - can then be deleted. 2 bytes - - * mov abs32 -> mov abs16 1 or 2 bytes - - * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes - - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes - - * Most instructions which accept d32 can relax to d16 1 or 2 bytes - - Most instructions which accept d16 can relax to d8 1 or 2 bytes - - We don't handle imm16->imm8 or d16->d8 as they're very rare - and somewhat more difficult to support. */ - -static boolean -mn10300_elf_relax_section (abfd, sec, link_info, again) - bfd *abfd; - asection *sec; - struct bfd_link_info *link_info; - boolean *again; -{ - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Rela *internal_relocs = NULL; - Elf_Internal_Rela *free_relocs = NULL; - Elf_Internal_Rela *irel, *irelend; - bfd_byte *contents = NULL; - bfd_byte *free_contents = NULL; - Elf32_External_Sym *extsyms = NULL; - Elf32_External_Sym *free_extsyms = NULL; - struct elf32_mn10300_link_hash_table *hash_table; - - /* Assume nothing changes. */ - *again = false; - - /* We need a pointer to the mn10300 specific hash table. */ - hash_table = elf32_mn10300_hash_table (link_info); - - /* Initialize fields in each hash table entry the first time through. */ - if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0) - { - bfd *input_bfd; - - /* Iterate over all the input bfds. */ - for (input_bfd = link_info->input_bfds; - input_bfd != NULL; - input_bfd = input_bfd->link_next) - { - asection *section; - - /* We're going to need all the symbols for each bfd. */ - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - - /* Get cached copy if it exists. */ - if (symtab_hdr->contents != NULL) - extsyms = (Elf32_External_Sym *) symtab_hdr->contents; - else - { - /* Go get them off disk. */ - extsyms = ((Elf32_External_Sym *) - bfd_malloc (symtab_hdr->sh_size)); - if (extsyms == NULL) - goto error_return; - free_extsyms = extsyms; - if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 - || (bfd_read (extsyms, 1, symtab_hdr->sh_size, input_bfd) - != symtab_hdr->sh_size)) - goto error_return; - } - - /* Iterate over each section in this bfd. */ - for (section = input_bfd->sections; - section != NULL; - section = section->next) - { - struct elf32_mn10300_link_hash_entry *hash; - Elf_Internal_Sym *sym; - asection *sym_sec = NULL; - const char *sym_name; - char *new_name; - - /* Get cached copy of section contents if it exists. */ - if (elf_section_data (section)->this_hdr.contents != NULL) - contents = elf_section_data (section)->this_hdr.contents; - else if (section->_raw_size != 0) - { - /* Go get them off disk. */ - contents = (bfd_byte *) bfd_malloc (section->_raw_size); - if (contents == NULL) - goto error_return; - free_contents = contents; - - if (!bfd_get_section_contents (input_bfd, section, - contents, (file_ptr) 0, - section->_raw_size)) - goto error_return; - } - else - { - contents = NULL; - free_contents = NULL; - } - - /* If there aren't any relocs, then there's nothing to do. */ - if ((section->flags & SEC_RELOC) != 0 - && section->reloc_count != 0) - { - - /* Get a copy of the native relocations. */ - internal_relocs = (_bfd_elf32_link_read_relocs - (input_bfd, section, (PTR) NULL, - (Elf_Internal_Rela *) NULL, - link_info->keep_memory)); - if (internal_relocs == NULL) - goto error_return; - if (! link_info->keep_memory) - free_relocs = internal_relocs; - - /* Now examine each relocation. */ - irel = internal_relocs; - irelend = irel + section->reloc_count; - for (; irel < irelend; irel++) - { - long r_type; - unsigned long r_index; - unsigned char code; - - r_type = ELF32_R_TYPE (irel->r_info); - r_index = ELF32_R_SYM (irel->r_info); - - if (r_type < 0 || r_type >= (int) R_MN10300_MAX) - goto error_return; - - /* We need the name and hash table entry of the target - symbol! */ - hash = NULL; - sym = NULL; - sym_sec = NULL; - - if (r_index < symtab_hdr->sh_info) - { - /* A local symbol. */ - Elf_Internal_Sym isym; - - bfd_elf32_swap_symbol_in (input_bfd, - extsyms + r_index, &isym); - - if (isym.st_shndx == SHN_UNDEF) - sym_sec = bfd_und_section_ptr; - else if (isym.st_shndx > 0 - && isym.st_shndx < SHN_LORESERVE) - sym_sec - = bfd_section_from_elf_index (input_bfd, - isym.st_shndx); - else if (isym.st_shndx == SHN_ABS) - sym_sec = bfd_abs_section_ptr; - else if (isym.st_shndx == SHN_COMMON) - sym_sec = bfd_com_section_ptr; - - sym_name = bfd_elf_string_from_elf_section (input_bfd, - symtab_hdr->sh_link, - isym.st_name); - - /* If it isn't a function, then we don't care - about it. */ - if (r_index < symtab_hdr->sh_info - && ELF_ST_TYPE (isym.st_info) != STT_FUNC) - continue; - - /* Tack on an ID so we can uniquely identify this - local symbol in the global hash table. */ - new_name = bfd_malloc (strlen (sym_name) + 10); - if (new_name == 0) - goto error_return; - - sprintf (new_name, "%s_%08x", - sym_name, (int) sym_sec); - sym_name = new_name; - - hash = (struct elf32_mn10300_link_hash_entry *) - elf_link_hash_lookup (&hash_table->static_hash_table->root, - sym_name, true, - true, false); - free (new_name); - } - else - { - r_index -= symtab_hdr->sh_info; - hash = (struct elf32_mn10300_link_hash_entry *) - elf_sym_hashes (input_bfd)[r_index]; - } - - /* If this is not a "call" instruction, then we - should convert "call" instructions to "calls" - instructions. */ - code = bfd_get_8 (input_bfd, - contents + irel->r_offset - 1); - if (code != 0xdd && code != 0xcd) - hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; - - /* If this is a jump/call, then bump the direct_calls - counter. Else force "call" to "calls" conversions. */ - if (r_type == R_MN10300_PCREL32 - || r_type == R_MN10300_PCREL16) - hash->direct_calls++; - else - hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; - } - } - - /* Now look at the actual contents to get the stack size, - and a list of what registers were saved in the prologue - (ie movm_args). */ - if ((section->flags & SEC_CODE) != 0) - { - - Elf32_External_Sym *esym, *esymend; - int idx, shndx; - - shndx = _bfd_elf_section_from_bfd_section (input_bfd, - section); - - /* Look at each function defined in this section and - update info for that function. */ - esym = extsyms; - esymend = esym + symtab_hdr->sh_info; - for (; esym < esymend; esym++) - { - Elf_Internal_Sym isym; - - bfd_elf32_swap_symbol_in (input_bfd, esym, &isym); - if (isym.st_shndx == shndx - && ELF_ST_TYPE (isym.st_info) == STT_FUNC) - { - if (isym.st_shndx == SHN_UNDEF) - sym_sec = bfd_und_section_ptr; - else if (isym.st_shndx > 0 - && isym.st_shndx < SHN_LORESERVE) - sym_sec - = bfd_section_from_elf_index (input_bfd, - isym.st_shndx); - else if (isym.st_shndx == SHN_ABS) - sym_sec = bfd_abs_section_ptr; - else if (isym.st_shndx == SHN_COMMON) - sym_sec = bfd_com_section_ptr; - - sym_name = bfd_elf_string_from_elf_section (input_bfd, - symtab_hdr->sh_link, - isym.st_name); - - /* Tack on an ID so we can uniquely identify this - local symbol in the global hash table. */ - new_name = bfd_malloc (strlen (sym_name) + 10); - if (new_name == 0) - goto error_return; - - sprintf (new_name, "%s_%08x", - sym_name, (int) sym_sec); - sym_name = new_name; - - hash = (struct elf32_mn10300_link_hash_entry *) - elf_link_hash_lookup (&hash_table->static_hash_table->root, - sym_name, true, - true, false); - free (new_name); - compute_function_info (input_bfd, hash, - isym.st_value, contents); - } - } - - esym = extsyms + symtab_hdr->sh_info; - esymend = extsyms + (symtab_hdr->sh_size - / sizeof (Elf32_External_Sym)); - for (idx = 0; esym < esymend; esym++, idx++) - { - Elf_Internal_Sym isym; - - bfd_elf32_swap_symbol_in (input_bfd, esym, &isym); - hash = (struct elf32_mn10300_link_hash_entry *) - elf_sym_hashes (input_bfd)[idx]; - if (isym.st_shndx == shndx - && ELF_ST_TYPE (isym.st_info) == STT_FUNC - && (hash)->root.root.u.def.section == section - && ((hash)->root.root.type == bfd_link_hash_defined - || (hash)->root.root.type == bfd_link_hash_defweak)) - compute_function_info (input_bfd, hash, - (hash)->root.root.u.def.value, - contents); - } - } - - /* Cache or free any memory we allocated for the relocs. */ - if (free_relocs != NULL) - { - free (free_relocs); - free_relocs = NULL; - } - - /* Cache or free any memory we allocated for the contents. */ - if (free_contents != NULL) - { - if (! link_info->keep_memory) - free (free_contents); - else - { - /* Cache the section contents for elf_link_input_bfd. */ - elf_section_data (section)->this_hdr.contents = contents; - } - free_contents = NULL; - } - } - - /* Cache or free any memory we allocated for the symbols. */ - if (free_extsyms != NULL) - { - if (! link_info->keep_memory) - free (free_extsyms); - else - { - /* Cache the symbols for elf_link_input_bfd. */ - symtab_hdr->contents = extsyms; - } - free_extsyms = NULL; - } - } - - /* Now iterate on each symbol in the hash table and perform - the final initialization steps on each. */ - elf32_mn10300_link_hash_traverse (hash_table, - elf32_mn10300_finish_hash_table_entry, - NULL); - elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, - elf32_mn10300_finish_hash_table_entry, - NULL); - - /* All entries in the hash table are fully initialized. */ - hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED; - - /* Now that everything has been initialized, go through each - code section and delete any prologue insns which will be - redundant because their operations will be performed by - a "call" instruction. */ - for (input_bfd = link_info->input_bfds; - input_bfd != NULL; - input_bfd = input_bfd->link_next) - { - asection *section; - - /* We're going to need all the symbols for each bfd. */ - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - - /* Get cached copy if it exists. */ - if (symtab_hdr->contents != NULL) - extsyms = (Elf32_External_Sym *) symtab_hdr->contents; - else - { - /* Go get them off disk. */ - extsyms = ((Elf32_External_Sym *) - bfd_malloc (symtab_hdr->sh_size)); - if (extsyms == NULL) - goto error_return; - free_extsyms = extsyms; - if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 - || (bfd_read (extsyms, 1, symtab_hdr->sh_size, input_bfd) - != symtab_hdr->sh_size)) - goto error_return; - } - - /* Walk over each section in this bfd. */ - for (section = input_bfd->sections; - section != NULL; - section = section->next) - { - int shndx; - Elf32_External_Sym *esym, *esymend; - int idx; - - /* Skip non-code sections and empty sections. */ - if ((section->flags & SEC_CODE) == 0 || section->_raw_size == 0) - continue; - - if (section->reloc_count != 0) - { - /* Get a copy of the native relocations. */ - internal_relocs = (_bfd_elf32_link_read_relocs - (input_bfd, section, (PTR) NULL, - (Elf_Internal_Rela *) NULL, - link_info->keep_memory)); - if (internal_relocs == NULL) - goto error_return; - if (! link_info->keep_memory) - free_relocs = internal_relocs; - } - - /* Get cached copy of section contents if it exists. */ - if (elf_section_data (section)->this_hdr.contents != NULL) - contents = elf_section_data (section)->this_hdr.contents; - else - { - /* Go get them off disk. */ - contents = (bfd_byte *) bfd_malloc (section->_raw_size); - if (contents == NULL) - goto error_return; - free_contents = contents; - - if (!bfd_get_section_contents (input_bfd, section, - contents, (file_ptr) 0, - section->_raw_size)) - goto error_return; - } - - shndx = _bfd_elf_section_from_bfd_section (input_bfd, section); - - /* Now look for any function in this section which needs - insns deleted from its prologue. */ - esym = extsyms; - esymend = esym + symtab_hdr->sh_info; - for (; esym < esymend; esym++) - { - Elf_Internal_Sym isym; - struct elf32_mn10300_link_hash_entry *sym_hash; - asection *sym_sec = NULL; - const char *sym_name; - char *new_name; - - bfd_elf32_swap_symbol_in (input_bfd, esym, &isym); - - if (isym.st_shndx != shndx) - continue; - - if (isym.st_shndx == SHN_UNDEF) - sym_sec = bfd_und_section_ptr; - else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE) - sym_sec - = bfd_section_from_elf_index (input_bfd, isym.st_shndx); - else if (isym.st_shndx == SHN_ABS) - sym_sec = bfd_abs_section_ptr; - else if (isym.st_shndx == SHN_COMMON) - sym_sec = bfd_com_section_ptr; - else - abort (); - - sym_name = bfd_elf_string_from_elf_section (input_bfd, - symtab_hdr->sh_link, - isym.st_name); - - /* Tack on an ID so we can uniquely identify this - local symbol in the global hash table. */ - new_name = bfd_malloc (strlen (sym_name) + 10); - if (new_name == 0) - goto error_return; - sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec); - sym_name = new_name; - - sym_hash = (struct elf32_mn10300_link_hash_entry *) - elf_link_hash_lookup (&hash_table->static_hash_table->root, - sym_name, false, - false, false); - - free (new_name); - if (sym_hash == NULL) - continue; - - if (! ((sym_hash)->flags & MN10300_CONVERT_CALL_TO_CALLS) - && ! ((sym_hash)->flags & MN10300_DELETED_PROLOGUE_BYTES)) - { - int bytes = 0; - - /* Note that we've changed things. */ - elf_section_data (section)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (section)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Count how many bytes we're going to delete. */ - if (sym_hash->movm_args) - bytes += 2; - - if (sym_hash->stack_size && sym_hash->stack_size <= 128) - bytes += 3; - else if (sym_hash->stack_size - && sym_hash->stack_size < 256) - bytes += 4; - - /* Note that we've deleted prologue bytes for this - function. */ - sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; - - /* Actually delete the bytes. */ - if (!mn10300_elf_relax_delete_bytes (input_bfd, - section, - isym.st_value, - bytes)) - goto error_return; - - /* Something changed. Not strictly necessary, but - may lead to more relaxing opportunities. */ - *again = true; - } - } - - /* Look for any global functions in this section which - need insns deleted from their prologues. */ - esym = extsyms + symtab_hdr->sh_info; - esymend = extsyms + (symtab_hdr->sh_size - / sizeof (Elf32_External_Sym)); - for (idx = 0; esym < esymend; esym++, idx++) - { - Elf_Internal_Sym isym; - struct elf32_mn10300_link_hash_entry *sym_hash; - - bfd_elf32_swap_symbol_in (input_bfd, esym, &isym); - sym_hash = (struct elf32_mn10300_link_hash_entry *) - (elf_sym_hashes (input_bfd)[idx]); - if (isym.st_shndx == shndx - && (sym_hash)->root.root.u.def.section == section - && ! ((sym_hash)->flags & MN10300_CONVERT_CALL_TO_CALLS) - && ! ((sym_hash)->flags & MN10300_DELETED_PROLOGUE_BYTES)) - { - int bytes = 0; - - /* Note that we've changed things. */ - elf_section_data (section)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (section)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Count how many bytes we're going to delete. */ - if (sym_hash->movm_args) - bytes += 2; - - if (sym_hash->stack_size && sym_hash->stack_size <= 128) - bytes += 3; - else if (sym_hash->stack_size - && sym_hash->stack_size < 256) - bytes += 4; - - /* Note that we've deleted prologue bytes for this - function. */ - sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; - - /* Actually delete the bytes. */ - if (!mn10300_elf_relax_delete_bytes (input_bfd, - section, - (sym_hash)->root.root.u.def.value, - bytes)) - goto error_return; - - /* Something changed. Not strictly necessary, but - may lead to more relaxing opportunities. */ - *again = true; - } - } - - /* Cache or free any memory we allocated for the relocs. */ - if (free_relocs != NULL) - { - free (free_relocs); - free_relocs = NULL; - } - - /* Cache or free any memory we allocated for the contents. */ - if (free_contents != NULL) - { - if (! link_info->keep_memory) - free (free_contents); - else - { - /* Cache the section contents for elf_link_input_bfd. */ - elf_section_data (section)->this_hdr.contents = contents; - } - free_contents = NULL; - } - } - - /* Cache or free any memory we allocated for the symbols. */ - if (free_extsyms != NULL) - { - if (! link_info->keep_memory) - free (free_extsyms); - else - { - /* Cache the symbols for elf_link_input_bfd. */ - symtab_hdr->contents = extsyms; - } - free_extsyms = NULL; - } - } - } - - /* (Re)initialize for the basic instruction shortening/relaxing pass. */ - contents = NULL; - extsyms = NULL; - internal_relocs = NULL; - free_relocs = NULL; - free_contents = NULL; - free_extsyms = NULL; - - /* We don't have to do anything for a relocateable link, if - this section does not have relocs, or if this is not a - code section. */ - if (link_info->relocateable - || (sec->flags & SEC_RELOC) == 0 - || sec->reloc_count == 0 - || (sec->flags & SEC_CODE) == 0) - return true; - - /* If this is the first time we have been called for this section, - initialize the cooked size. */ - if (sec->_cooked_size == 0) - sec->_cooked_size = sec->_raw_size; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - - /* Get a copy of the native relocations. */ - internal_relocs = (_bfd_elf32_link_read_relocs - (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, - link_info->keep_memory)); - if (internal_relocs == NULL) - goto error_return; - if (! link_info->keep_memory) - free_relocs = internal_relocs; - - /* Walk through them looking for relaxing opportunities. */ - irelend = internal_relocs + sec->reloc_count; - for (irel = internal_relocs; irel < irelend; irel++) - { - bfd_vma symval; - struct elf32_mn10300_link_hash_entry *h = NULL; - - /* If this isn't something that can be relaxed, then ignore - this reloc. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE - || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8 - || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX) - continue; - - /* Get the section contents if we haven't done so already. */ - if (contents == NULL) - { - /* Get cached copy if it exists. */ - if (elf_section_data (sec)->this_hdr.contents != NULL) - contents = elf_section_data (sec)->this_hdr.contents; - else - { - /* Go get them off disk. */ - contents = (bfd_byte *) bfd_malloc (sec->_raw_size); - if (contents == NULL) - goto error_return; - free_contents = contents; - - if (! bfd_get_section_contents (abfd, sec, contents, - (file_ptr) 0, sec->_raw_size)) - goto error_return; - } - } - - /* Read this BFD's symbols if we haven't done so already. */ - if (extsyms == NULL) - { - /* Get cached copy if it exists. */ - if (symtab_hdr->contents != NULL) - extsyms = (Elf32_External_Sym *) symtab_hdr->contents; - else - { - /* Go get them off disk. */ - extsyms = ((Elf32_External_Sym *) - bfd_malloc (symtab_hdr->sh_size)); - if (extsyms == NULL) - goto error_return; - free_extsyms = extsyms; - if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 - || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) - != symtab_hdr->sh_size)) - goto error_return; - } - } - - /* Get the value of the symbol referred to by the reloc. */ - if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) - { - Elf_Internal_Sym isym; - asection *sym_sec = NULL; - const char *sym_name; - char *new_name; - - /* A local symbol. */ - bfd_elf32_swap_symbol_in (abfd, - extsyms + ELF32_R_SYM (irel->r_info), - &isym); - - if (isym.st_shndx == SHN_UNDEF) - sym_sec = bfd_und_section_ptr; - else if (isym.st_shndx > 0 && isym.st_shndx < SHN_LORESERVE) - sym_sec = bfd_section_from_elf_index (abfd, isym.st_shndx); - else if (isym.st_shndx == SHN_ABS) - sym_sec = bfd_abs_section_ptr; - else if (isym.st_shndx == SHN_COMMON) - sym_sec = bfd_com_section_ptr; - else - abort (); - - symval = (isym.st_value - + sym_sec->output_section->vma - + sym_sec->output_offset); - sym_name = bfd_elf_string_from_elf_section (abfd, - symtab_hdr->sh_link, - isym.st_name); - - /* Tack on an ID so we can uniquely identify this - local symbol in the global hash table. */ - new_name = bfd_malloc (strlen (sym_name) + 10); - if (new_name == 0) - goto error_return; - sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec); - sym_name = new_name; - - h = (struct elf32_mn10300_link_hash_entry *) - elf_link_hash_lookup (&hash_table->static_hash_table->root, - sym_name, false, false, false); - free (new_name); - } - else - { - unsigned long indx; - - /* An external symbol. */ - indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; - h = (struct elf32_mn10300_link_hash_entry *) - (elf_sym_hashes (abfd)[indx]); - BFD_ASSERT (h != NULL); - if (h->root.root.type != bfd_link_hash_defined - && h->root.root.type != bfd_link_hash_defweak) - { - /* This appears to be a reference to an undefined - symbol. Just ignore it--it will be caught by the - regular reloc processing. */ - continue; - } - - symval = (h->root.root.u.def.value - + h->root.root.u.def.section->output_section->vma - + h->root.root.u.def.section->output_offset); - } - - /* For simplicity of coding, we are going to modify the section - contents, the section relocs, and the BFD symbol table. We - must tell the rest of the code not to free up this - information. It would be possible to instead create a table - of changes which have to be made, as is done in coff-mips.c; - that would be more work, but would require less memory when - the linker is run. */ - - /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative - branch/call, also deal with "call" -> "calls" conversions and - insertion of prologue data into "call" instructions. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32) - { - bfd_vma value = symval; - - /* If we've got a "call" instruction that needs to be turned - into a "calls" instruction, do so now. It saves a byte. */ - if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) - { - unsigned char code; - - /* Get the opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - /* Make sure we're working with a "call" instruction! */ - if (code == 0xdd) - { - /* Note that we've changed the relocs, section contents, - etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1); - bfd_put_8 (abfd, 0xff, contents + irel->r_offset); - - /* Fix irel->r_offset and irel->r_addend. */ - irel->r_offset += 1; - irel->r_addend += 1; - - /* Delete one byte of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 3, 1)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - } - } - else if (h) - { - /* We've got a "call" instruction which needs some data - from target function filled in. */ - unsigned char code; - - /* Get the opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - /* Insert data from the target function into the "call" - instruction if needed. */ - if (code == 0xdd) - { - bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4); - bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, - contents + irel->r_offset + 5); - } - } - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= irel->r_offset; - value += irel->r_addend; - - /* See if the value will fit in 16 bits, note the high value is - 0x7fff + 2 as the target will be two bytes closer if we are - able to relax. */ - if ((long) value < 0x8001 && (long) value > -0x8000) - { - unsigned char code; - - /* Get the opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - if (code != 0xdc && code != 0xdd && code != 0xff) - continue; - - /* Note that we've changed the relocs, section contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - if (code == 0xdc) - bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1); - else if (code == 0xdd) - bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1); - else if (code == 0xff) - bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_PCREL16); - - /* Delete two bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 1, 2)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - } - } - - /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative - branch. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16) - { - bfd_vma value = symval; - - /* If we've got a "call" instruction that needs to be turned - into a "calls" instruction, do so now. It saves a byte. */ - if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) - { - unsigned char code; - - /* Get the opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - /* Make sure we're working with a "call" instruction! */ - if (code == 0xcd) - { - /* Note that we've changed the relocs, section contents, - etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1); - bfd_put_8 (abfd, 0xff, contents + irel->r_offset); - - /* Fix irel->r_offset and irel->r_addend. */ - irel->r_offset += 1; - irel->r_addend += 1; - - /* Delete one byte of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 1, 1)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - } - } - else if (h) - { - unsigned char code; - - /* Get the opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - /* Insert data from the target function into the "call" - instruction if needed. */ - if (code == 0xcd) - { - bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2); - bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, - contents + irel->r_offset + 3); - } - } - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= irel->r_offset; - value += irel->r_addend; - - /* See if the value will fit in 8 bits, note the high value is - 0x7f + 1 as the target will be one bytes closer if we are - able to relax. */ - if ((long) value < 0x80 && (long) value > -0x80) - { - unsigned char code; - - /* Get the opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - if (code != 0xcc) - continue; - - /* Note that we've changed the relocs, section contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_PCREL8); - - /* Delete one byte of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 1, 1)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - } - } - - /* Try to eliminate an unconditional 8 bit pc-relative branch - which immediately follows a conditional 8 bit pc-relative - branch around the unconditional branch. - - original: new: - bCC lab1 bCC' lab2 - bra lab2 - lab1: lab1: - - This happens when the bCC can't reach lab2 at assembly time, - but due to other relaxations it can reach at link time. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8) - { - Elf_Internal_Rela *nrel; - bfd_vma value = symval; - unsigned char code; - - /* Deal with pc-relative gunk. */ - value -= (sec->output_section->vma + sec->output_offset); - value -= irel->r_offset; - value += irel->r_addend; - - /* Do nothing if this reloc is the last byte in the section. */ - if (irel->r_offset == sec->_cooked_size) - continue; - - /* See if the next instruction is an unconditional pc-relative - branch, more often than not this test will fail, so we - test it first to speed things up. */ - code = bfd_get_8 (abfd, contents + irel->r_offset + 1); - if (code != 0xca) - continue; - - /* Also make sure the next relocation applies to the next - instruction and that it's a pc-relative 8 bit branch. */ - nrel = irel + 1; - if (nrel == irelend - || irel->r_offset + 2 != nrel->r_offset - || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8) - continue; - - /* Make sure our destination immediately follows the - unconditional branch. */ - if (symval != (sec->output_section->vma + sec->output_offset - + irel->r_offset + 3)) - continue; - - /* Now make sure we are a conditional branch. This may not - be necessary, but why take the chance. - - Note these checks assume that R_MN10300_PCREL8 relocs - only occur on bCC and bCCx insns. If they occured - elsewhere, we'd need to know the start of this insn - for this check to be accurate. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - if (code != 0xc0 && code != 0xc1 && code != 0xc2 - && code != 0xc3 && code != 0xc4 && code != 0xc5 - && code != 0xc6 && code != 0xc7 && code != 0xc8 - && code != 0xc9 && code != 0xe8 && code != 0xe9 - && code != 0xea && code != 0xeb) - continue; - - /* We also have to be sure there is no symbol/label - at the unconditional branch. */ - if (mn10300_elf_symbol_address_p (abfd, sec, extsyms, - irel->r_offset + 1)) - continue; - - /* Note that we've changed the relocs, section contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Reverse the condition of the first branch. */ - switch (code) - { - case 0xc8: - code = 0xc9; - break; - case 0xc9: - code = 0xc8; - break; - case 0xc0: - code = 0xc2; - break; - case 0xc2: - code = 0xc0; - break; - case 0xc3: - code = 0xc1; - break; - case 0xc1: - code = 0xc3; - break; - case 0xc4: - code = 0xc6; - break; - case 0xc6: - code = 0xc4; - break; - case 0xc7: - code = 0xc5; - break; - case 0xc5: - code = 0xc7; - break; - case 0xe8: - code = 0xe9; - break; - case 0x9d: - code = 0xe8; - break; - case 0xea: - code = 0xeb; - break; - case 0xeb: - code = 0xea; - break; - } - bfd_put_8 (abfd, code, contents + irel->r_offset - 1); - - /* Set the reloc type and symbol for the first branch - from the second branch. */ - irel->r_info = nrel->r_info; - - /* Make the reloc for the second branch a null reloc. */ - nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), - R_MN10300_NONE); - - /* Delete two bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 1, 2)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - } - - /* Try to turn a 24 immediate, displacement or absolute address - into a 8 immediate, displacement or absolute address. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24) - { - bfd_vma value = symval; - value += irel->r_addend; - - /* See if the value will fit in 8 bits. */ - if ((long) value < 0x7f && (long) value > -0x80) - { - unsigned char code; - - /* AM33 insns which have 24 operands are 6 bytes long and - will have 0xfd as the first byte. */ - - /* Get the first opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 3); - - if (code == 0xfd) - { - /* Get the second opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 2); - - /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit - equivalent instructions exists. */ - if (code != 0x6b && code != 0x7b - && code != 0x8b && code != 0x9b - && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 - || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b - || (code & 0x0f) == 0x0e)) - { - /* Not safe if the high bit is on as relaxing may - move the value out of high mem and thus not fit - in a signed 8bit value. This is currently over - conservative. */ - if ((value & 0x80) == 0) - { - /* Note that we've changed the relocation contents, - etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3); - bfd_put_8 (abfd, code, contents + irel->r_offset - 2); - - /* Fix the relocation's type. */ - irel->r_info = - ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_8); - - /* Delete two bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 1, 2)) - goto error_return; - - /* That will change things, so, we should relax - again. Note that this is not required, and it - may be slow. */ - *again = true; - break; - } - } - } - } - } - - /* Try to turn a 32bit immediate, displacement or absolute address - into a 16bit immediate, displacement or absolute address. */ - if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32) - { - bfd_vma value = symval; - value += irel->r_addend; - - /* See if the value will fit in 24 bits. - We allow any 16bit match here. We prune those we can't - handle below. */ - if ((long) value < 0x7fffff && (long) value > -0x800000) - { - unsigned char code; - - /* AM33 insns which have 32bit operands are 7 bytes long and - will have 0xfe as the first byte. */ - - /* Get the first opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 3); - - if (code == 0xfe) - { - /* Get the second opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 2); - - /* All the am33 32 -> 24 relaxing possibilities. */ - /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit - equivalent instructions exists. */ - if (code != 0x6b && code != 0x7b - && code != 0x8b && code != 0x9b - && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 - || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b - || (code & 0x0f) == 0x0e)) - { - /* Not safe if the high bit is on as relaxing may - move the value out of high mem and thus not fit - in a signed 16bit value. This is currently over - conservative. */ - if ((value & 0x8000) == 0) - { - /* Note that we've changed the relocation contents, - etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3); - bfd_put_8 (abfd, code, contents + irel->r_offset - 2); - - /* Fix the relocation's type. */ - irel->r_info = - ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_24); - - /* Delete one byte of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 3, 1)) - goto error_return; - - /* That will change things, so, we should relax - again. Note that this is not required, and it - may be slow. */ - *again = true; - break; - } - } - } - } - - /* See if the value will fit in 16 bits. - We allow any 16bit match here. We prune those we can't - handle below. */ - if ((long) value < 0x7fff && (long) value > -0x8000) - { - unsigned char code; - - /* Most insns which have 32bit operands are 6 bytes long; - exceptions are pcrel insns and bit insns. - - We handle pcrel insns above. We don't bother trying - to handle the bit insns here. - - The first byte of the remaining insns will be 0xfc. */ - - /* Get the first opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 2); - - if (code != 0xfc) - continue; - - /* Get the second opcode. */ - code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - - if ((code & 0xf0) < 0x80) - switch (code & 0xf0) - { - /* mov (d32,am),dn -> mov (d32,am),dn - mov dm,(d32,am) -> mov dn,(d32,am) - mov (d32,am),an -> mov (d32,am),an - mov dm,(d32,am) -> mov dn,(d32,am) - movbu (d32,am),dn -> movbu (d32,am),dn - movbu dm,(d32,am) -> movbu dn,(d32,am) - movhu (d32,am),dn -> movhu (d32,am),dn - movhu dm,(d32,am) -> movhu dn,(d32,am) */ - case 0x00: - case 0x10: - case 0x20: - case 0x30: - case 0x40: - case 0x50: - case 0x60: - case 0x70: - /* Not safe if the high bit is on as relaxing may - move the value out of high mem and thus not fit - in a signed 16bit value. */ - if (code == 0xcc - && (value & 0x8000)) - continue; - - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); - bfd_put_8 (abfd, code, contents + irel->r_offset - 1); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_16); - - /* Delete two bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 2, 2)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - break; - } - else if ((code & 0xf0) == 0x80 - || (code & 0xf0) == 0x90) - switch (code & 0xf3) - { - /* mov dn,(abs32) -> mov dn,(abs16) - movbu dn,(abs32) -> movbu dn,(abs16) - movhu dn,(abs32) -> movhu dn,(abs16) */ - case 0x81: - case 0x82: - case 0x83: - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - if ((code & 0xf3) == 0x81) - code = 0x01 + (code & 0x0c); - else if ((code & 0xf3) == 0x82) - code = 0x02 + (code & 0x0c); - else if ((code & 0xf3) == 0x83) - code = 0x03 + (code & 0x0c); - else - abort (); - - /* Fix the opcode. */ - bfd_put_8 (abfd, code, contents + irel->r_offset - 2); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_16); - - /* The opcode got shorter too, so we have to fix the - addend and offset too! */ - irel->r_offset -= 1; - - /* Delete three bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 1, 3)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - break; - - /* mov am,(abs32) -> mov am,(abs16) - mov am,(d32,sp) -> mov am,(d16,sp) - mov dm,(d32,sp) -> mov dm,(d32,sp) - movbu dm,(d32,sp) -> movbu dm,(d32,sp) - movhu dm,(d32,sp) -> movhu dm,(d32,sp) */ - case 0x80: - case 0x90: - case 0x91: - case 0x92: - case 0x93: - /* sp-based offsets are zero-extended. */ - if (code >= 0x90 && code <= 0x93 - && (long)value < 0) - continue; - - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); - bfd_put_8 (abfd, code, contents + irel->r_offset - 1); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_16); - - /* Delete two bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 2, 2)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - break; - } - else if ((code & 0xf0) < 0xf0) - switch (code & 0xfc) - { - /* mov imm32,dn -> mov imm16,dn - mov imm32,an -> mov imm16,an - mov (abs32),dn -> mov (abs16),dn - movbu (abs32),dn -> movbu (abs16),dn - movhu (abs32),dn -> movhu (abs16),dn */ - case 0xcc: - case 0xdc: - case 0xa4: - case 0xa8: - case 0xac: - /* Not safe if the high bit is on as relaxing may - move the value out of high mem and thus not fit - in a signed 16bit value. */ - if (code == 0xcc - && (value & 0x8000)) - continue; - - /* mov imm16, an zero-extends the immediate. */ - if (code == 0xdc - && (long)value < 0) - continue; - - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - if ((code & 0xfc) == 0xcc) - code = 0x2c + (code & 0x03); - else if ((code & 0xfc) == 0xdc) - code = 0x24 + (code & 0x03); - else if ((code & 0xfc) == 0xa4) - code = 0x30 + (code & 0x03); - else if ((code & 0xfc) == 0xa8) - code = 0x34 + (code & 0x03); - else if ((code & 0xfc) == 0xac) - code = 0x38 + (code & 0x03); - else - abort (); - - /* Fix the opcode. */ - bfd_put_8 (abfd, code, contents + irel->r_offset - 2); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_16); - - /* The opcode got shorter too, so we have to fix the - addend and offset too! */ - irel->r_offset -= 1; - - /* Delete three bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 1, 3)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - break; - - /* mov (abs32),an -> mov (abs16),an - mov (d32,sp),an -> mov (d16,sp),an - mov (d32,sp),dn -> mov (d16,sp),dn - movbu (d32,sp),dn -> movbu (d16,sp),dn - movhu (d32,sp),dn -> movhu (d16,sp),dn - add imm32,dn -> add imm16,dn - cmp imm32,dn -> cmp imm16,dn - add imm32,an -> add imm16,an - cmp imm32,an -> cmp imm16,an - and imm32,dn -> and imm16,dn - or imm32,dn -> or imm16,dn - xor imm32,dn -> xor imm16,dn - btst imm32,dn -> btst imm16,dn */ - - case 0xa0: - case 0xb0: - case 0xb1: - case 0xb2: - case 0xb3: - case 0xc0: - case 0xc8: - - case 0xd0: - case 0xd8: - case 0xe0: - case 0xe1: - case 0xe2: - case 0xe3: - /* cmp imm16, an zero-extends the immediate. */ - if (code == 0xdc - && (long)value < 0) - continue; - - /* So do sp-based offsets. */ - if (code >= 0xb0 && code <= 0xb3 - && (long)value < 0) - continue; - - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); - bfd_put_8 (abfd, code, contents + irel->r_offset - 1); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_16); - - /* Delete two bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 2, 2)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - break; - } - else if (code == 0xfe) - { - /* add imm32,sp -> add imm16,sp */ - - /* Note that we've changed the relocation contents, etc. */ - elf_section_data (sec)->relocs = internal_relocs; - free_relocs = NULL; - - elf_section_data (sec)->this_hdr.contents = contents; - free_contents = NULL; - - symtab_hdr->contents = (bfd_byte *) extsyms; - free_extsyms = NULL; - - /* Fix the opcode. */ - bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); - bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1); - - /* Fix the relocation's type. */ - irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), - R_MN10300_16); - - /* Delete two bytes of data. */ - if (!mn10300_elf_relax_delete_bytes (abfd, sec, - irel->r_offset + 2, 2)) - goto error_return; - - /* That will change things, so, we should relax again. - Note that this is not required, and it may be slow. */ - *again = true; - break; - } - } - } - } - - if (free_relocs != NULL) - { - free (free_relocs); - free_relocs = NULL; - } - - if (free_contents != NULL) - { - if (! link_info->keep_memory) - free (free_contents); - else - { - /* Cache the section contents for elf_link_input_bfd. */ - elf_section_data (sec)->this_hdr.contents = contents; - } - free_contents = NULL; - } - - if (free_extsyms != NULL) - { - if (! link_info->keep_memory) - free (free_extsyms); - else - { - /* Cache the symbols for elf_link_input_bfd. */ - symtab_hdr->contents = extsyms; - } - free_extsyms = NULL; - } - - return true; - - error_return: - if (free_relocs != NULL) - free (free_relocs); - if (free_contents != NULL) - free (free_contents); - if (free_extsyms != NULL) - free (free_extsyms); - return false; -} - -/* Compute the stack size and movm arguments for the function - referred to by HASH at address ADDR in section with - contents CONTENTS, store the information in the hash table. */ -static void -compute_function_info (abfd, hash, addr, contents) - bfd *abfd; - struct elf32_mn10300_link_hash_entry *hash; - bfd_vma addr; - unsigned char *contents; -{ - unsigned char byte1, byte2; - /* We only care about a very small subset of the possible prologue - sequences here. Basically we look for: - - movm [d2,d3,a2,a3],sp (optional) - add <size>,sp (optional, and only for sizes which fit in an unsigned - 8 bit number) - - If we find anything else, we quit. */ - - /* Look for movm [regs],sp */ - byte1 = bfd_get_8 (abfd, contents + addr); - byte2 = bfd_get_8 (abfd, contents + addr + 1); - - if (byte1 == 0xcf) - { - hash->movm_args = byte2; - addr += 2; - byte1 = bfd_get_8 (abfd, contents + addr); - byte2 = bfd_get_8 (abfd, contents + addr + 1); - } - - /* Now figure out how much stack space will be allocated by the movm - instruction. We need this kept separate from the funtion's normal - stack space. */ - if (hash->movm_args) - { - /* Space for d2. */ - if (hash->movm_args & 0x80) - hash->movm_stack_size += 4; - - /* Space for d3. */ - if (hash->movm_args & 0x40) - hash->movm_stack_size += 4; - - /* Space for a2. */ - if (hash->movm_args & 0x20) - hash->movm_stack_size += 4; - - /* Space for a3. */ - if (hash->movm_args & 0x10) - hash->movm_stack_size += 4; - - /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */ - if (hash->movm_args & 0x08) - hash->movm_stack_size += 8 * 4; - - if (bfd_get_mach (abfd) == bfd_mach_am33) - { - /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */ - if (hash->movm_args & 0x1) - hash->movm_stack_size += 6 * 4; - - /* exreg1 space. e4, e5, e6, e7 */ - if (hash->movm_args & 0x2) - hash->movm_stack_size += 4 * 4; - - /* exreg0 space. e2, e3 */ - if (hash->movm_args & 0x4) - hash->movm_stack_size += 2 * 4; - } - } - - /* Now look for the two stack adjustment variants. */ - if (byte1 == 0xf8 && byte2 == 0xfe) - { - int temp = bfd_get_8 (abfd, contents + addr + 2); - temp = ((temp & 0xff) ^ (~0x7f)) + 0x80; - - hash->stack_size = -temp; - } - else if (byte1 == 0xfa && byte2 == 0xfe) - { - int temp = bfd_get_16 (abfd, contents + addr + 2); - temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000; - temp = -temp; - - if (temp < 255) - hash->stack_size = temp; - } - - /* If the total stack to be allocated by the call instruction is more - than 255 bytes, then we can't remove the stack adjustment by using - "call" (we might still be able to remove the "movm" instruction. */ - if (hash->stack_size + hash->movm_stack_size > 255) - hash->stack_size = 0; - - return; -} - -/* Delete some bytes from a section while relaxing. */ - -static boolean -mn10300_elf_relax_delete_bytes (abfd, sec, addr, count) - bfd *abfd; - asection *sec; - bfd_vma addr; - int count; -{ - Elf_Internal_Shdr *symtab_hdr; - Elf32_External_Sym *extsyms; - int shndx, index; - bfd_byte *contents; - Elf_Internal_Rela *irel, *irelend; - Elf_Internal_Rela *irelalign; - bfd_vma toaddr; - Elf32_External_Sym *esym, *esymend; - struct elf32_mn10300_link_hash_entry *sym_hash; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - extsyms = (Elf32_External_Sym *) symtab_hdr->contents; - - shndx = _bfd_elf_section_from_bfd_section (abfd, sec); - - contents = elf_section_data (sec)->this_hdr.contents; - - /* The deletion must stop at the next ALIGN reloc for an aligment - power larger than the number of bytes we are deleting. */ - - irelalign = NULL; - toaddr = sec->_cooked_size; - - irel = elf_section_data (sec)->relocs; - irelend = irel + sec->reloc_count; - - /* Actually delete the bytes. */ - memmove (contents + addr, contents + addr + count, toaddr - addr - count); - sec->_cooked_size -= count; - - /* Adjust all the relocs. */ - for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) - { - /* Get the new reloc address. */ - if ((irel->r_offset > addr - && irel->r_offset < toaddr)) - irel->r_offset -= count; - } - - /* Adjust the local symbols defined in this section. */ - esym = extsyms; - esymend = esym + symtab_hdr->sh_info; - for (; esym < esymend; esym++) - { - Elf_Internal_Sym isym; - - bfd_elf32_swap_symbol_in (abfd, esym, &isym); - - if (isym.st_shndx == shndx - && isym.st_value > addr - && isym.st_value < toaddr) - { - isym.st_value -= count; - bfd_elf32_swap_symbol_out (abfd, &isym, esym); - } - } - - /* Now adjust the global symbols defined in this section. */ - esym = extsyms + symtab_hdr->sh_info; - esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); - for (index = 0; esym < esymend; esym++, index++) - { - Elf_Internal_Sym isym; - - bfd_elf32_swap_symbol_in (abfd, esym, &isym); - sym_hash = (struct elf32_mn10300_link_hash_entry *) - (elf_sym_hashes (abfd)[index]); - if (isym.st_shndx == shndx - && ((sym_hash)->root.root.type == bfd_link_hash_defined - || (sym_hash)->root.root.type == bfd_link_hash_defweak) - && (sym_hash)->root.root.u.def.section == sec - && (sym_hash)->root.root.u.def.value > addr - && (sym_hash)->root.root.u.def.value < toaddr) - { - (sym_hash)->root.root.u.def.value -= count; - } - } - - return true; -} - -/* Return true if a symbol exists at the given address, else return - false. */ -static boolean -mn10300_elf_symbol_address_p (abfd, sec, extsyms, addr) - bfd *abfd; - asection *sec; - Elf32_External_Sym *extsyms; - bfd_vma addr; -{ - Elf_Internal_Shdr *symtab_hdr; - int shndx; - Elf32_External_Sym *esym, *esymend; - struct elf32_mn10300_link_hash_entry **sym_hash, **sym_hash_end; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - shndx = _bfd_elf_section_from_bfd_section (abfd, sec); - - /* Examine all the symbols. */ - esym = extsyms; - esymend = esym + symtab_hdr->sh_info; - for (; esym < esymend; esym++) - { - Elf_Internal_Sym isym; - - bfd_elf32_swap_symbol_in (abfd, esym, &isym); - - if (isym.st_shndx == shndx - && isym.st_value == addr) - return true; - } - - sym_hash = (struct elf32_mn10300_link_hash_entry **) (elf_sym_hashes (abfd)); - sym_hash_end = (sym_hash - + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) - - symtab_hdr->sh_info)); - for (; sym_hash < sym_hash_end; sym_hash++) - { - if (((*sym_hash)->root.root.type == bfd_link_hash_defined - || (*sym_hash)->root.root.type == bfd_link_hash_defweak) - && (*sym_hash)->root.root.u.def.section == sec - && (*sym_hash)->root.root.u.def.value == addr) - return true; - } - return false; -} - -/* This is a version of bfd_generic_get_relocated_section_contents - which uses mn10300_elf_relocate_section. */ - -static bfd_byte * -mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order, - data, relocateable, symbols) - bfd *output_bfd; - struct bfd_link_info *link_info; - struct bfd_link_order *link_order; - bfd_byte *data; - boolean relocateable; - asymbol **symbols; -{ - Elf_Internal_Shdr *symtab_hdr; - asection *input_section = link_order->u.indirect.section; - bfd *input_bfd = input_section->owner; - asection **sections = NULL; - Elf_Internal_Rela *internal_relocs = NULL; - Elf32_External_Sym *external_syms = NULL; - Elf_Internal_Sym *internal_syms = NULL; - - /* We only need to handle the case of relaxing, or of having a - particular set of section contents, specially. */ - if (relocateable - || elf_section_data (input_section)->this_hdr.contents == NULL) - return bfd_generic_get_relocated_section_contents (output_bfd, link_info, - link_order, data, - relocateable, - symbols); - - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; - - memcpy (data, elf_section_data (input_section)->this_hdr.contents, - input_section->_raw_size); - - if ((input_section->flags & SEC_RELOC) != 0 - && input_section->reloc_count > 0) - { - Elf_Internal_Sym *isymp; - asection **secpp; - Elf32_External_Sym *esym, *esymend; - - if (symtab_hdr->contents != NULL) - external_syms = (Elf32_External_Sym *) symtab_hdr->contents; - else - { - external_syms = ((Elf32_External_Sym *) - bfd_malloc (symtab_hdr->sh_info - * sizeof (Elf32_External_Sym))); - if (external_syms == NULL && symtab_hdr->sh_info > 0) - goto error_return; - if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 - || (bfd_read (external_syms, sizeof (Elf32_External_Sym), - symtab_hdr->sh_info, input_bfd) - != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)))) - goto error_return; - } - - internal_relocs = (_bfd_elf32_link_read_relocs - (input_bfd, input_section, (PTR) NULL, - (Elf_Internal_Rela *) NULL, false)); - if (internal_relocs == NULL) - goto error_return; - - internal_syms = ((Elf_Internal_Sym *) - bfd_malloc (symtab_hdr->sh_info - * sizeof (Elf_Internal_Sym))); - if (internal_syms == NULL && symtab_hdr->sh_info > 0) - goto error_return; - - sections = (asection **) bfd_malloc (symtab_hdr->sh_info - * sizeof (asection *)); - if (sections == NULL && symtab_hdr->sh_info > 0) - goto error_return; - - isymp = internal_syms; - secpp = sections; - esym = external_syms; - esymend = esym + symtab_hdr->sh_info; - for (; esym < esymend; ++esym, ++isymp, ++secpp) - { - asection *isec; - - bfd_elf32_swap_symbol_in (input_bfd, esym, isymp); - - if (isymp->st_shndx == SHN_UNDEF) - isec = bfd_und_section_ptr; - else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE) - isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx); - else if (isymp->st_shndx == SHN_ABS) - isec = bfd_abs_section_ptr; - else if (isymp->st_shndx == SHN_COMMON) - isec = bfd_com_section_ptr; - else - { - /* Who knows? */ - isec = NULL; - } - - *secpp = isec; - } - - if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd, - input_section, data, internal_relocs, - internal_syms, sections)) - goto error_return; - - if (sections != NULL) - free (sections); - sections = NULL; - if (internal_syms != NULL) - free (internal_syms); - internal_syms = NULL; - if (external_syms != NULL && symtab_hdr->contents == NULL) - free (external_syms); - external_syms = NULL; - if (internal_relocs != elf_section_data (input_section)->relocs) - free (internal_relocs); - internal_relocs = NULL; - } - - return data; - - error_return: - if (internal_relocs != NULL - && internal_relocs != elf_section_data (input_section)->relocs) - free (internal_relocs); - if (external_syms != NULL && symtab_hdr->contents == NULL) - free (external_syms); - if (internal_syms != NULL) - free (internal_syms); - if (sections != NULL) - free (sections); - return NULL; -} - -/* Assorted hash table functions. */ - -/* Initialize an entry in the link hash table. */ - -/* Create an entry in an MN10300 ELF linker hash table. */ - -static struct bfd_hash_entry * -elf32_mn10300_link_hash_newfunc (entry, table, string) - struct bfd_hash_entry *entry; - struct bfd_hash_table *table; - const char *string; -{ - struct elf32_mn10300_link_hash_entry *ret = - (struct elf32_mn10300_link_hash_entry *) entry; - - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (ret == (struct elf32_mn10300_link_hash_entry *) NULL) - ret = ((struct elf32_mn10300_link_hash_entry *) - bfd_hash_allocate (table, - sizeof (struct elf32_mn10300_link_hash_entry))); - if (ret == (struct elf32_mn10300_link_hash_entry *) NULL) - return (struct bfd_hash_entry *) ret; - - /* Call the allocation method of the superclass. */ - ret = ((struct elf32_mn10300_link_hash_entry *) - _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, - table, string)); - if (ret != (struct elf32_mn10300_link_hash_entry *) NULL) - { - ret->direct_calls = 0; - ret->stack_size = 0; - ret->movm_stack_size = 0; - ret->flags = 0; - ret->movm_args = 0; - } - - return (struct bfd_hash_entry *) ret; -} - -/* Create an mn10300 ELF linker hash table. */ - -static struct bfd_link_hash_table * -elf32_mn10300_link_hash_table_create (abfd) - bfd *abfd; -{ - struct elf32_mn10300_link_hash_table *ret; - - ret = ((struct elf32_mn10300_link_hash_table *) - bfd_alloc (abfd, sizeof (struct elf32_mn10300_link_hash_table))); - if (ret == (struct elf32_mn10300_link_hash_table *) NULL) - return NULL; - - if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, - elf32_mn10300_link_hash_newfunc)) - { - bfd_release (abfd, ret); - return NULL; - } - - ret->flags = 0; - ret->static_hash_table - = ((struct elf32_mn10300_link_hash_table *) - bfd_alloc (abfd, sizeof (struct elf_link_hash_table))); - if (ret->static_hash_table == NULL) - { - bfd_release (abfd, ret); - return NULL; - } - - if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd, - elf32_mn10300_link_hash_newfunc)) - { - bfd_release (abfd, ret->static_hash_table); - bfd_release (abfd, ret); - return NULL; - } - return &ret->root.root; -} - -static int -elf_mn10300_mach (flags) - flagword flags; -{ - switch (flags & EF_MN10300_MACH) - { - case E_MN10300_MACH_MN10300: - default: - return bfd_mach_mn10300; - - case E_MN10300_MACH_AM33: - return bfd_mach_am33; - } -} - -/* The final processing done just before writing out a MN10300 ELF object - file. This gets the MN10300 architecture right based on the machine - number. */ - -void -_bfd_mn10300_elf_final_write_processing (abfd, linker) - bfd *abfd; - boolean linker ATTRIBUTE_UNUSED; -{ - unsigned long val; - - switch (bfd_get_mach (abfd)) - { - default: - case bfd_mach_mn10300: - val = E_MN10300_MACH_MN10300; - break; - - case bfd_mach_am33: - val = E_MN10300_MACH_AM33; - break; - } - - elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH); - elf_elfheader (abfd)->e_flags |= val; -} - -boolean -_bfd_mn10300_elf_object_p (abfd) - bfd *abfd; -{ - bfd_default_set_arch_mach (abfd, bfd_arch_mn10300, - elf_mn10300_mach (elf_elfheader (abfd)->e_flags)); - return true; -} - -/* Merge backend specific data from an object file to the output - object file when linking. */ - -boolean -_bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd) - bfd *ibfd; - bfd *obfd; -{ - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour - || bfd_get_flavour (obfd) != bfd_target_elf_flavour) - return true; - - if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) - && bfd_get_mach (obfd) < bfd_get_mach (ibfd)) - { - if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), - bfd_get_mach (ibfd))) - return false; - } - - return true; -} - -#define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec -#define TARGET_LITTLE_NAME "elf32-mn10300" -#define ELF_ARCH bfd_arch_mn10300 -#define ELF_MACHINE_CODE EM_CYGNUS_MN10300 -#define ELF_MAXPAGESIZE 0x1000 - -#define elf_info_to_howto mn10300_info_to_howto -#define elf_info_to_howto_rel 0 -#define elf_backend_can_gc_sections 1 -#define elf_backend_check_relocs mn10300_elf_check_relocs -#define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook -#define elf_backend_relocate_section mn10300_elf_relocate_section -#define bfd_elf32_bfd_relax_section mn10300_elf_relax_section -#define bfd_elf32_bfd_get_relocated_section_contents \ - mn10300_elf_get_relocated_section_contents -#define bfd_elf32_bfd_link_hash_table_create \ - elf32_mn10300_link_hash_table_create - -#define elf_symbol_leading_char '_' - -/* So we can set bits in e_flags. */ -#define elf_backend_final_write_processing \ - _bfd_mn10300_elf_final_write_processing -#define elf_backend_object_p _bfd_mn10300_elf_object_p - -#define bfd_elf32_bfd_merge_private_bfd_data \ - _bfd_mn10300_elf_merge_private_bfd_data - -#include "elf32-target.h" |