X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bfd%2Felf32-h8300.c;h=e05efbdba93a526f23675deddb3a8117aaa3c29d;hb=0fc1eb3c4d0fb716bad2b525dd5f35168c4f4df9;hp=e3529726e027e47a601222c1cb4487f87a4fa28a;hpb=630a7b0ab74a32287bb2c3b7df1b97a1015e0bc5;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/elf32-h8300.c b/bfd/elf32-h8300.c index e3529726e0..e05efbdba9 100644 --- a/bfd/elf32-h8300.c +++ b/bfd/elf32-h8300.c @@ -1,12 +1,12 @@ /* BFD back-end for Renesas H8/300 ELF binaries. - Copyright 1993, 1995, 1998, 1999, 2001, 2002, 2003, 2004 - Free Software Foundation, Inc. + Copyright 1993, 1995, 1998, 1999, 2001, 2002, 2003, 2004, 2005, 2006, + 2007, 2009, 2010 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 + the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, @@ -16,10 +16,11 @@ 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. */ + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" #include "libbfd.h" #include "elf-bfd.h" #include "elf/h8.h" @@ -42,11 +43,6 @@ static bfd_boolean elf32_h8_symbol_address_p (bfd *, asection *, bfd_vma); static bfd_byte *elf32_h8_get_relocated_section_contents (bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *, bfd_boolean, asymbol **); -static asection *elf32_h8_gc_mark_hook - (asection *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *); -static bfd_boolean elf32_h8_gc_sweep_hook - (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); static bfd_reloc_status_type elf32_h8_final_link_relocate (unsigned long, bfd *, bfd *, asection *, bfd_byte *, bfd_vma, bfd_vma, bfd_vma, @@ -256,6 +252,22 @@ elf32_h8_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, return NULL; } +static reloc_howto_type * +elf32_h8_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < sizeof (h8_elf_howto_table) / sizeof (h8_elf_howto_table[0]); + i++) + if (h8_elf_howto_table[i].name != NULL + && strcasecmp (h8_elf_howto_table[i].name, r_name) == 0) + return &h8_elf_howto_table[i]; + + return NULL; +} + static void elf32_h8_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, Elf_Internal_Rela *elf_reloc) @@ -348,7 +360,7 @@ elf32_h8_final_link_relocate (unsigned long r_type, bfd *input_bfd, value += addend; /* HIT_DATA is the address for the first byte for the relocated - value. Subtract 1 so that we can manipulate the data in 32bit + value. Subtract 1 so that we can manipulate the data in 32-bit hunks. */ hit_data--; @@ -358,7 +370,7 @@ elf32_h8_final_link_relocate (unsigned long r_type, bfd *input_bfd, /* Retrieve the type byte for value from the section contents. */ value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); - /* Now scribble it out in one 32bit hunk. */ + /* Now scribble it out in one 32-bit hunk. */ bfd_put_32 (input_bfd, value, hit_data); return bfd_reloc_ok; @@ -407,9 +419,6 @@ elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info, struct elf_link_hash_entry **sym_hashes; Elf_Internal_Rela *rel, *relend; - if (info->relocatable) - return TRUE; - symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; sym_hashes = elf_sym_hashes (input_bfd); @@ -424,8 +433,12 @@ elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info, struct elf_link_hash_entry *h; bfd_vma relocation; bfd_reloc_status_type r; + arelent bfd_reloc; + reloc_howto_type *howto; + + elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel); + howto = bfd_reloc.howto; - /* This is a final link. */ r_symndx = ELF32_R_SYM (rel->r_info); r_type = ELF32_R_TYPE (rel->r_info); h = NULL; @@ -439,30 +452,28 @@ elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info, } else { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - if (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - { - sec = h->root.u.def.section; - relocation = (h->root.u.def.value - + sec->output_section->vma - + sec->output_offset); - } - else if (h->root.type == bfd_link_hash_undefweak) - relocation = 0; - else - { - if (! ((*info->callbacks->undefined_symbol) - (info, h->root.root.string, input_bfd, - input_section, rel->r_offset, TRUE))) - return FALSE; - relocation = 0; - } + bfd_boolean unresolved_reloc, warned; + + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned); } + if (sec != NULL && elf_discarded_section (sec)) + { + /* For relocs against symbols from removed linkonce sections, + or sections discarded by a linker script, we just want the + section contents zeroed. Avoid any special processing. */ + _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); + rel->r_info = 0; + rel->r_addend = 0; + continue; + } + + if (info->relocatable) + continue; + r = elf32_h8_final_link_relocate (r_type, input_bfd, output_bfd, input_section, contents, rel->r_offset, @@ -473,11 +484,6 @@ elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info, { const char *name; const char *msg = (const char *) 0; - arelent bfd_reloc; - reloc_howto_type *howto; - - elf32_h8_info_to_howto (input_bfd, &bfd_reloc, rel); - howto = bfd_reloc.howto; if (h != NULL) name = h->root.root.string; @@ -493,8 +499,9 @@ elf32_h8_relocate_section (bfd *output_bfd, struct bfd_link_info *info, { case bfd_reloc_overflow: if (! ((*info->callbacks->reloc_overflow) - (info, name, howto->name, (bfd_vma) 0, - input_bfd, input_section, rel->r_offset))) + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, + rel->r_offset))) return FALSE; break; @@ -666,6 +673,9 @@ elf32_h8_merge_private_bfd_data (bfd *ibfd, bfd *obfd) mov.b:16 -> mov.b:8 2 bytes mov.b:24/32 -> mov.b:8 4 bytes + bset:24/32 -> bset:16 2 bytes + (also applicable to other bit manipulation instructions) + mov.[bwl]:24/32 -> mov.[bwl]:16 2 bytes */ static bfd_boolean @@ -692,11 +702,6 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, || (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. */ @@ -717,6 +722,11 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, { bfd_vma symval; + { + arelent bfd_reloc; + + elf32_h8_info_to_howto (abfd, &bfd_reloc, irel); + } /* Keep track of the previous reloc so that we can delete some long jumps created by the compiler. */ if (irel != internal_relocs) @@ -738,12 +748,7 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, else { /* Go get them off disk. */ - contents = (bfd_byte *) bfd_malloc (sec->_raw_size); - if (contents == NULL) - goto error_return; - - if (! bfd_get_section_contents (abfd, sec, contents, - (file_ptr) 0, sec->_raw_size)) + if (!bfd_malloc_and_get_section (abfd, sec, &contents)) goto error_return; } } @@ -808,7 +813,7 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, the linker is run. */ switch (ELF32_R_TYPE (irel->r_info)) { - /* Try to turn a 24 bit absolute branch/call into an 8 bit + /* Try to turn a 24-bit absolute branch/call into an 8-bit pc-relative branch/call. */ case R_H8_DIR24R8: { @@ -919,8 +924,10 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, } if (code == 0x5e) + /* This is jsr. */ bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 1); else if (code == 0x5a) + /* This is jmp. */ bfd_put_8 (abfd, 0x40, contents + irel->r_offset - 1); else abort (); @@ -941,7 +948,7 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, break; } - /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative + /* Try to turn a 16-bit pc-relative branch into a 8-bit pc-relative branch. */ case R_H8_PCREL16: { @@ -975,17 +982,25 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, if (code == 0x58) { /* bCC:16 -> bCC:8 */ - /* Get the condition code from the original insn. */ + /* Get the second byte of the original insn, which + contains the condition code. */ code = bfd_get_8 (abfd, contents + irel->r_offset - 1); + + /* Compute the fisrt byte of the relaxed + instruction. The original sequence 0x58 0xX0 + is relaxed to 0x4X, where X represents the + condition code. */ code &= 0xf0; code >>= 4; code |= 0x40; bfd_put_8 (abfd, code, contents + irel->r_offset - 2); } else if (code == 0x5c) + /* This is bsr. */ bfd_put_8 (abfd, 0x55, contents + irel->r_offset - 2); else - abort (); + /* Might be MOVSD. */ + break; /* Fix the relocation's type. */ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), @@ -1179,10 +1194,17 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, } } - /* Fall through. */ + /* Fall through. */ + + /* This is a 24-/32-bit absolute address in one of the + following instructions: + + "band", "bclr", "biand", "bild", "bior", "bist", + "bixor", "bld", "bnot", "bor", "bset", "bst", "btst", + "bxor", "ldc.w", "stc.w" and "mov.[bwl]" - /* This is a 24/32bit absolute address in a "mov" insn, which may - become a 16-bit absolute address if it is in the right range. */ + We may relax this into an 16-bit absolute address if it's + in the right range. */ case R_H8_DIR32A16: { bfd_vma value; @@ -1191,6 +1213,8 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, if (value <= 0x7fff || value >= 0xffff8000u) { unsigned char code; + unsigned char op0, op1, op2, op3; + unsigned char *op_ptr; /* Note that we've changed the relocs, section contents, etc. */ @@ -1198,14 +1222,98 @@ elf32_h8_relax_section (bfd *abfd, asection *sec, elf_section_data (sec)->this_hdr.contents = contents; symtab_hdr->contents = (unsigned char *) isymbuf; + if (irel->r_offset >= 4) + { + /* Check for 4-byte MOVA relaxation. */ + int second_reloc = 0; + + op_ptr = contents + irel->r_offset - 4; + + if (last_reloc) + { + arelent bfd_reloc; + reloc_howto_type *h; + bfd_vma last_reloc_size; + + elf32_h8_info_to_howto (abfd, &bfd_reloc, last_reloc); + h = bfd_reloc.howto; + last_reloc_size = 1 << h->size; + if (last_reloc->r_offset + last_reloc_size + == irel->r_offset) + { + op_ptr -= last_reloc_size; + second_reloc = 1; + } + } + if (irel < irelend) + { + Elf_Internal_Rela *next_reloc = irel + 1; + arelent bfd_reloc; + reloc_howto_type *h; + bfd_vma next_reloc_size; + + elf32_h8_info_to_howto (abfd, &bfd_reloc, next_reloc); + h = bfd_reloc.howto; + next_reloc_size = 1 << h->size; + if (next_reloc->r_offset + next_reloc_size + == irel->r_offset) + { + op_ptr -= next_reloc_size; + second_reloc = 1; + } + } + + op0 = bfd_get_8 (abfd, op_ptr + 0); + op1 = bfd_get_8 (abfd, op_ptr + 1); + op2 = bfd_get_8 (abfd, op_ptr + 2); + op3 = bfd_get_8 (abfd, op_ptr + 3); + + if (op0 == 0x01 + && (op1 & 0xdf) == 0x5f + && (op2 & 0x40) == 0x40 + && (op3 & 0x80) == 0x80) + { + if ((op2 & 0x08) == 0) + second_reloc = 1; + + if (second_reloc) + { + op3 &= ~0x08; + bfd_put_8 (abfd, op3, op_ptr + 3); + } + else + { + op2 &= ~0x08; + bfd_put_8 (abfd, op2, op_ptr + 2); + } + goto r_h8_dir32a16_common; + } + } + + /* Now check for short version of MOVA. */ + op_ptr = contents + irel->r_offset - 2; + op0 = bfd_get_8 (abfd, op_ptr + 0); + op1 = bfd_get_8 (abfd, op_ptr + 1); + + if (op0 == 0x7a + && (op1 & 0x88) == 0x80) + { + op1 |= 0x08; + bfd_put_8 (abfd, op1, op_ptr + 1); + goto r_h8_dir32a16_common; + } + /* Get the opcode. */ code = bfd_get_8 (abfd, contents + irel->r_offset - 1); - /* We just need to turn off bit 0x20. */ + /* Fix the opcode. For all the instructions that + belong to this relaxation, we simply need to turn + off bit 0x20 in the previous byte. */ code &= ~0x20; bfd_put_8 (abfd, code, contents + irel->r_offset - 1); + r_h8_dir32a16_common: /* Fix the relocation's type. */ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_H8_DIR16); @@ -1276,7 +1384,6 @@ elf32_h8_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count) unsigned int sec_shndx; bfd_byte *contents; Elf_Internal_Rela *irel, *irelend; - Elf_Internal_Rela *irelalign; Elf_Internal_Sym *isym; Elf_Internal_Sym *isymend; bfd_vma toaddr; @@ -1288,11 +1395,7 @@ elf32_h8_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count) 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; + toaddr = sec->size; irel = elf_section_data (sec)->relocs; irelend = irel + sec->reloc_count; @@ -1300,7 +1403,7 @@ elf32_h8_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count) /* Actually delete the bytes. */ memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count)); - sec->_cooked_size -= count; + sec->size -= count; /* Adjust all the relocs. */ for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) @@ -1417,7 +1520,7 @@ elf32_h8_get_relocated_section_contents (bfd *output_bfd, symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; memcpy (data, elf_section_data (input_section)->this_hdr.contents, - (size_t) input_section->_raw_size); + (size_t) input_section->size); if ((input_section->flags & SEC_RELOC) != 0 && input_section->reloc_count > 0) @@ -1494,42 +1597,6 @@ elf32_h8_get_relocated_section_contents (bfd *output_bfd, return NULL; } -static asection * -elf32_h8_gc_mark_hook (asection *sec, - struct bfd_link_info *info ATTRIBUTE_UNUSED, - Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, - struct elf_link_hash_entry *h, - Elf_Internal_Sym *sym) -{ - if (h != NULL) - { - switch (h->root.type) - { - case bfd_link_hash_defined: - case bfd_link_hash_defweak: - return h->root.u.def.section; - - case bfd_link_hash_common: - return h->root.u.c.p->section; - - default: - break; - } - } - else - return bfd_section_from_elf_index (sec->owner, sym->st_shndx); - return NULL; -} - -static bfd_boolean -elf32_h8_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info ATTRIBUTE_UNUSED, - asection *sec ATTRIBUTE_UNUSED, - const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) -{ - return TRUE; -} - #define TARGET_BIG_SYM bfd_elf32_h8300_vec #define TARGET_BIG_NAME "elf32-h8300" @@ -1537,6 +1604,7 @@ elf32_h8_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, #define ELF_MACHINE_CODE EM_H8_300 #define ELF_MAXPAGESIZE 0x1 #define bfd_elf32_bfd_reloc_type_lookup elf32_h8_reloc_type_lookup +#define bfd_elf32_bfd_reloc_name_lookup elf32_h8_reloc_name_lookup #define elf_info_to_howto elf32_h8_info_to_howto #define elf_info_to_howto_rel elf32_h8_info_to_howto_rel @@ -1548,12 +1616,10 @@ elf32_h8_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, elf32_h8_object_p #define bfd_elf32_bfd_merge_private_bfd_data \ elf32_h8_merge_private_bfd_data -#define elf_backend_gc_mark_hook elf32_h8_gc_mark_hook -#define elf_backend_gc_sweep_hook elf32_h8_gc_sweep_hook /* ??? when elf_backend_relocate_section is not defined, elf32-target.h defaults to using _bfd_generic_link_hash_table_create, but - elflink.h:bfd_elf32_size_dynamic_sections uses + bfd_elf_size_dynamic_sections uses dynobj = elf_hash_table (info)->dynobj; and thus requires an elf hash table. */ #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create @@ -1568,5 +1634,6 @@ elf32_h8_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, #define bfd_elf32_bfd_get_relocated_section_contents \ elf32_h8_get_relocated_section_contents +#define elf_symbol_leading_char '_' #include "elf32-target.h"