diff options
Diffstat (limited to 'bfd/elf-m10300.c')
| -rw-r--r-- | bfd/elf-m10300.c | 2821 |
1 files changed, 2821 insertions, 0 deletions
diff --git a/bfd/elf-m10300.c b/bfd/elf-m10300.c new file mode 100644 index 00000000000..9ba09a88d61 --- /dev/null +++ b/bfd/elf-m10300.c @@ -0,0 +1,2821 @@ +/* Matsushita 10300 specific support for 32-bit ELF + Copyright (C) 1996, 1997, 1998 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; + 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; + 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; + 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; + } + } + } + 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; + asection *input_section; + bfd_byte *contents; + bfd_vma offset; + bfd_vma value; + bfd_vma addend; + struct bfd_link_info *info; + asection *sym_sec; + int is_local; +{ + 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))) + 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))) + 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; +{ + 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; + const char *sym_name; + char *new_name; + Elf_Internal_Shdr *hdr; + + /* 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; + const char *sym_name; + Elf_Internal_Shdr *hdr; + 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; + + 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; + Elf_Internal_Shdr *hdr; + 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; + + 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 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 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: + /* 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; + + /* 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 (d32,sp),an + mov (d32,sp),dn -> mov (d32,sp),dn + movbu (d32,sp),dn -> movbu (d32,sp),dn + movhu (d32,sp),dn -> movhu (d32,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 imm32,dn + or imm32,dn -> or imm32,dn + xor imm32,dn -> xor imm32,dn + btst imm32,dn -> btst imm32,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: + /* 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; + + } + + /* 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; + + } +} + +/* The final processing done just before writing out a MN10300 ELF object + file. This gets the MN10300 architecture right based on the machine + number. */ + +/*ARGSUSED*/ +void +_bfd_mn10300_elf_final_write_processing (abfd, linker) + bfd *abfd; + boolean linker; +{ + unsigned long val; + unsigned int i; + Elf_Internal_Shdr **hdrpp; + const char *name; + asection *sec; + + switch (bfd_get_mach (abfd)) + { + default: + case bfd_mach_mn10300: + val = E_MN10300_MACH_MN10300; + 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" |