| 1 |
/* Matsushita 10300 specific support for 32-bit ELF |
| 2 |
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
| 3 |
2006, 2007 Free Software Foundation, Inc. |
| 4 |
|
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This file is part of BFD, the Binary File Descriptor library. |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 3 of the License, or |
| 10 |
(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
| 18 |
along with this program; if not, write to the Free Software |
| 19 |
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 |
MA 02110-1301, USA. */ |
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|
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#include "sysdep.h" |
| 23 |
#include "bfd.h" |
| 24 |
#include "libbfd.h" |
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#include "elf-bfd.h" |
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#include "elf/mn10300.h" |
| 27 |
#include "libiberty.h" |
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|
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/* The mn10300 linker needs to keep track of the number of relocs that |
| 30 |
it decides to copy in check_relocs for each symbol. This is so |
| 31 |
that it can discard PC relative relocs if it doesn't need them when |
| 32 |
linking with -Bsymbolic. We store the information in a field |
| 33 |
extending the regular ELF linker hash table. */ |
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|
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struct elf32_mn10300_link_hash_entry |
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{ |
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/* The basic elf link hash table entry. */ |
| 38 |
struct elf_link_hash_entry root; |
| 39 |
|
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/* For function symbols, the number of times this function is |
| 41 |
called directly (ie by name). */ |
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unsigned int direct_calls; |
| 43 |
|
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/* For function symbols, the size of this function's stack |
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(if <= 255 bytes). We stuff this into "call" instructions |
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to this target when it's valid and profitable to do so. |
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|
| 48 |
This does not include stack allocated by movm! */ |
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unsigned char stack_size; |
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|
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/* For function symbols, arguments (if any) for movm instruction |
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in the prologue. We stuff this value into "call" instructions |
| 53 |
to the target when it's valid and profitable to do so. */ |
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unsigned char movm_args; |
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|
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/* For function symbols, the amount of stack space that would be allocated |
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by the movm instruction. This is redundant with movm_args, but we |
| 58 |
add it to the hash table to avoid computing it over and over. */ |
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unsigned char movm_stack_size; |
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|
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/* When set, convert all "call" instructions to this target into "calls" |
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instructions. */ |
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#define MN10300_CONVERT_CALL_TO_CALLS 0x1 |
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|
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/* Used to mark functions which have had redundant parts of their |
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prologue deleted. */ |
| 67 |
#define MN10300_DELETED_PROLOGUE_BYTES 0x2 |
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unsigned char flags; |
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|
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/* Calculated value. */ |
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bfd_vma value; |
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}; |
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|
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/* We derive a hash table from the main elf linker hash table so |
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we can store state variables and a secondary hash table without |
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resorting to global variables. */ |
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struct elf32_mn10300_link_hash_table |
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{ |
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/* The main hash table. */ |
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struct elf_link_hash_table root; |
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|
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/* A hash table for static functions. We could derive a new hash table |
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instead of using the full elf32_mn10300_link_hash_table if we wanted |
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to save some memory. */ |
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struct elf32_mn10300_link_hash_table *static_hash_table; |
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|
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/* Random linker state flags. */ |
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#define MN10300_HASH_ENTRIES_INITIALIZED 0x1 |
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char flags; |
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}; |
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|
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#ifndef streq |
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#define streq(a, b) (strcmp ((a),(b)) == 0) |
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#endif |
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|
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/* For MN10300 linker hash table. */ |
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|
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/* Get the MN10300 ELF linker hash table from a link_info structure. */ |
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|
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#define elf32_mn10300_hash_table(p) \ |
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((struct elf32_mn10300_link_hash_table *) ((p)->hash)) |
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|
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#define elf32_mn10300_link_hash_traverse(table, func, info) \ |
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(elf_link_hash_traverse \ |
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(&(table)->root, \ |
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(bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
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(info))) |
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|
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static reloc_howto_type elf_mn10300_howto_table[] = |
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{ |
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/* Dummy relocation. Does nothing. */ |
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HOWTO (R_MN10300_NONE, |
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0, |
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2, |
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16, |
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FALSE, |
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0, |
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complain_overflow_bitfield, |
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bfd_elf_generic_reloc, |
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"R_MN10300_NONE", |
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FALSE, |
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0, |
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0, |
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FALSE), |
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/* Standard 32 bit reloc. */ |
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HOWTO (R_MN10300_32, |
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0, |
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2, |
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32, |
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FALSE, |
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0, |
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complain_overflow_bitfield, |
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bfd_elf_generic_reloc, |
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"R_MN10300_32", |
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FALSE, |
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0xffffffff, |
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0xffffffff, |
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FALSE), |
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/* Standard 16 bit reloc. */ |
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HOWTO (R_MN10300_16, |
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0, |
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1, |
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16, |
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FALSE, |
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0, |
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complain_overflow_bitfield, |
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bfd_elf_generic_reloc, |
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"R_MN10300_16", |
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FALSE, |
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0xffff, |
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0xffff, |
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FALSE), |
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/* Standard 8 bit reloc. */ |
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HOWTO (R_MN10300_8, |
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0, |
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0, |
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8, |
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FALSE, |
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0, |
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complain_overflow_bitfield, |
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bfd_elf_generic_reloc, |
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"R_MN10300_8", |
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FALSE, |
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0xff, |
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0xff, |
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FALSE), |
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/* Standard 32bit pc-relative reloc. */ |
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HOWTO (R_MN10300_PCREL32, |
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0, |
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2, |
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32, |
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TRUE, |
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0, |
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complain_overflow_bitfield, |
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bfd_elf_generic_reloc, |
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"R_MN10300_PCREL32", |
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FALSE, |
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0xffffffff, |
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0xffffffff, |
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TRUE), |
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/* Standard 16bit pc-relative reloc. */ |
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HOWTO (R_MN10300_PCREL16, |
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0, |
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1, |
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16, |
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TRUE, |
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0, |
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complain_overflow_bitfield, |
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bfd_elf_generic_reloc, |
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"R_MN10300_PCREL16", |
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FALSE, |
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0xffff, |
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0xffff, |
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TRUE), |
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/* Standard 8 pc-relative reloc. */ |
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HOWTO (R_MN10300_PCREL8, |
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0, |
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0, |
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8, |
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TRUE, |
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0, |
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complain_overflow_bitfield, |
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bfd_elf_generic_reloc, |
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"R_MN10300_PCREL8", |
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FALSE, |
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0xff, |
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0xff, |
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TRUE), |
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|
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/* GNU extension to record C++ vtable hierarchy. */ |
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HOWTO (R_MN10300_GNU_VTINHERIT, /* type */ |
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0, /* rightshift */ |
| 213 |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
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0, /* bitsize */ |
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FALSE, /* pc_relative */ |
| 216 |
0, /* bitpos */ |
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complain_overflow_dont, /* complain_on_overflow */ |
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NULL, /* special_function */ |
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"R_MN10300_GNU_VTINHERIT", /* name */ |
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FALSE, /* partial_inplace */ |
| 221 |
0, /* src_mask */ |
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0, /* dst_mask */ |
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FALSE), /* pcrel_offset */ |
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|
| 225 |
/* GNU extension to record C++ vtable member usage */ |
| 226 |
HOWTO (R_MN10300_GNU_VTENTRY, /* type */ |
| 227 |
0, /* rightshift */ |
| 228 |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
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0, /* bitsize */ |
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FALSE, /* pc_relative */ |
| 231 |
0, /* bitpos */ |
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complain_overflow_dont, /* complain_on_overflow */ |
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NULL, /* special_function */ |
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"R_MN10300_GNU_VTENTRY", /* name */ |
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FALSE, /* partial_inplace */ |
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0, /* src_mask */ |
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0, /* dst_mask */ |
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FALSE), /* pcrel_offset */ |
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|
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/* Standard 24 bit reloc. */ |
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HOWTO (R_MN10300_24, |
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0, |
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2, |
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24, |
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FALSE, |
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0, |
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complain_overflow_bitfield, |
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bfd_elf_generic_reloc, |
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"R_MN10300_24", |
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FALSE, |
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0xffffff, |
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0xffffff, |
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FALSE), |
| 254 |
HOWTO (R_MN10300_GOTPC32, /* type */ |
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0, /* rightshift */ |
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2, /* size (0 = byte, 1 = short, 2 = long) */ |
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32, /* bitsize */ |
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TRUE, /* pc_relative */ |
| 259 |
0, /* bitpos */ |
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complain_overflow_bitfield, /* complain_on_overflow */ |
| 261 |
bfd_elf_generic_reloc, /* */ |
| 262 |
"R_MN10300_GOTPC32", /* name */ |
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FALSE, /* partial_inplace */ |
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0xffffffff, /* src_mask */ |
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0xffffffff, /* dst_mask */ |
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TRUE), /* pcrel_offset */ |
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|
| 268 |
HOWTO (R_MN10300_GOTPC16, /* type */ |
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0, /* rightshift */ |
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1, /* size (0 = byte, 1 = short, 2 = long) */ |
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16, /* bitsize */ |
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TRUE, /* pc_relative */ |
| 273 |
0, /* bitpos */ |
| 274 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 275 |
bfd_elf_generic_reloc, /* */ |
| 276 |
"R_MN10300_GOTPC16", /* name */ |
| 277 |
FALSE, /* partial_inplace */ |
| 278 |
0xffff, /* src_mask */ |
| 279 |
0xffff, /* dst_mask */ |
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TRUE), /* pcrel_offset */ |
| 281 |
|
| 282 |
HOWTO (R_MN10300_GOTOFF32, /* type */ |
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0, /* rightshift */ |
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2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 285 |
32, /* bitsize */ |
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FALSE, /* pc_relative */ |
| 287 |
0, /* bitpos */ |
| 288 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 289 |
bfd_elf_generic_reloc, /* */ |
| 290 |
"R_MN10300_GOTOFF32", /* name */ |
| 291 |
FALSE, /* partial_inplace */ |
| 292 |
0xffffffff, /* src_mask */ |
| 293 |
0xffffffff, /* dst_mask */ |
| 294 |
FALSE), /* pcrel_offset */ |
| 295 |
|
| 296 |
HOWTO (R_MN10300_GOTOFF24, /* type */ |
| 297 |
0, /* rightshift */ |
| 298 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 299 |
24, /* bitsize */ |
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FALSE, /* pc_relative */ |
| 301 |
0, /* bitpos */ |
| 302 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 303 |
bfd_elf_generic_reloc, /* */ |
| 304 |
"R_MN10300_GOTOFF24", /* name */ |
| 305 |
FALSE, /* partial_inplace */ |
| 306 |
0xffffff, /* src_mask */ |
| 307 |
0xffffff, /* dst_mask */ |
| 308 |
FALSE), /* pcrel_offset */ |
| 309 |
|
| 310 |
HOWTO (R_MN10300_GOTOFF16, /* type */ |
| 311 |
0, /* rightshift */ |
| 312 |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 313 |
16, /* bitsize */ |
| 314 |
FALSE, /* pc_relative */ |
| 315 |
0, /* bitpos */ |
| 316 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 317 |
bfd_elf_generic_reloc, /* */ |
| 318 |
"R_MN10300_GOTOFF16", /* name */ |
| 319 |
FALSE, /* partial_inplace */ |
| 320 |
0xffff, /* src_mask */ |
| 321 |
0xffff, /* dst_mask */ |
| 322 |
FALSE), /* pcrel_offset */ |
| 323 |
|
| 324 |
HOWTO (R_MN10300_PLT32, /* type */ |
| 325 |
0, /* rightshift */ |
| 326 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 327 |
32, /* bitsize */ |
| 328 |
TRUE, /* pc_relative */ |
| 329 |
0, /* bitpos */ |
| 330 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 331 |
bfd_elf_generic_reloc, /* */ |
| 332 |
"R_MN10300_PLT32", /* name */ |
| 333 |
FALSE, /* partial_inplace */ |
| 334 |
0xffffffff, /* src_mask */ |
| 335 |
0xffffffff, /* dst_mask */ |
| 336 |
TRUE), /* pcrel_offset */ |
| 337 |
|
| 338 |
HOWTO (R_MN10300_PLT16, /* type */ |
| 339 |
0, /* rightshift */ |
| 340 |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 341 |
16, /* bitsize */ |
| 342 |
TRUE, /* pc_relative */ |
| 343 |
0, /* bitpos */ |
| 344 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 345 |
bfd_elf_generic_reloc, /* */ |
| 346 |
"R_MN10300_PLT16", /* name */ |
| 347 |
FALSE, /* partial_inplace */ |
| 348 |
0xffff, /* src_mask */ |
| 349 |
0xffff, /* dst_mask */ |
| 350 |
TRUE), /* pcrel_offset */ |
| 351 |
|
| 352 |
HOWTO (R_MN10300_GOT32, /* type */ |
| 353 |
0, /* rightshift */ |
| 354 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 355 |
32, /* bitsize */ |
| 356 |
FALSE, /* pc_relative */ |
| 357 |
0, /* bitpos */ |
| 358 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 359 |
bfd_elf_generic_reloc, /* */ |
| 360 |
"R_MN10300_GOT32", /* name */ |
| 361 |
FALSE, /* partial_inplace */ |
| 362 |
0xffffffff, /* src_mask */ |
| 363 |
0xffffffff, /* dst_mask */ |
| 364 |
FALSE), /* pcrel_offset */ |
| 365 |
|
| 366 |
HOWTO (R_MN10300_GOT24, /* type */ |
| 367 |
0, /* rightshift */ |
| 368 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 369 |
24, /* bitsize */ |
| 370 |
FALSE, /* pc_relative */ |
| 371 |
0, /* bitpos */ |
| 372 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 373 |
bfd_elf_generic_reloc, /* */ |
| 374 |
"R_MN10300_GOT24", /* name */ |
| 375 |
FALSE, /* partial_inplace */ |
| 376 |
0xffffffff, /* src_mask */ |
| 377 |
0xffffffff, /* dst_mask */ |
| 378 |
FALSE), /* pcrel_offset */ |
| 379 |
|
| 380 |
HOWTO (R_MN10300_GOT16, /* type */ |
| 381 |
0, /* rightshift */ |
| 382 |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 383 |
16, /* bitsize */ |
| 384 |
FALSE, /* pc_relative */ |
| 385 |
0, /* bitpos */ |
| 386 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 387 |
bfd_elf_generic_reloc, /* */ |
| 388 |
"R_MN10300_GOT16", /* name */ |
| 389 |
FALSE, /* partial_inplace */ |
| 390 |
0xffffffff, /* src_mask */ |
| 391 |
0xffffffff, /* dst_mask */ |
| 392 |
FALSE), /* pcrel_offset */ |
| 393 |
|
| 394 |
HOWTO (R_MN10300_COPY, /* type */ |
| 395 |
0, /* rightshift */ |
| 396 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 397 |
32, /* bitsize */ |
| 398 |
FALSE, /* pc_relative */ |
| 399 |
0, /* bitpos */ |
| 400 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 401 |
bfd_elf_generic_reloc, /* */ |
| 402 |
"R_MN10300_COPY", /* name */ |
| 403 |
FALSE, /* partial_inplace */ |
| 404 |
0xffffffff, /* src_mask */ |
| 405 |
0xffffffff, /* dst_mask */ |
| 406 |
FALSE), /* pcrel_offset */ |
| 407 |
|
| 408 |
HOWTO (R_MN10300_GLOB_DAT, /* type */ |
| 409 |
0, /* rightshift */ |
| 410 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 411 |
32, /* bitsize */ |
| 412 |
FALSE, /* pc_relative */ |
| 413 |
0, /* bitpos */ |
| 414 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 415 |
bfd_elf_generic_reloc, /* */ |
| 416 |
"R_MN10300_GLOB_DAT", /* name */ |
| 417 |
FALSE, /* partial_inplace */ |
| 418 |
0xffffffff, /* src_mask */ |
| 419 |
0xffffffff, /* dst_mask */ |
| 420 |
FALSE), /* pcrel_offset */ |
| 421 |
|
| 422 |
HOWTO (R_MN10300_JMP_SLOT, /* type */ |
| 423 |
0, /* rightshift */ |
| 424 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 425 |
32, /* bitsize */ |
| 426 |
FALSE, /* pc_relative */ |
| 427 |
0, /* bitpos */ |
| 428 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 429 |
bfd_elf_generic_reloc, /* */ |
| 430 |
"R_MN10300_JMP_SLOT", /* name */ |
| 431 |
FALSE, /* partial_inplace */ |
| 432 |
0xffffffff, /* src_mask */ |
| 433 |
0xffffffff, /* dst_mask */ |
| 434 |
FALSE), /* pcrel_offset */ |
| 435 |
|
| 436 |
HOWTO (R_MN10300_RELATIVE, /* type */ |
| 437 |
0, /* rightshift */ |
| 438 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 439 |
32, /* bitsize */ |
| 440 |
FALSE, /* pc_relative */ |
| 441 |
0, /* bitpos */ |
| 442 |
complain_overflow_bitfield, /* complain_on_overflow */ |
| 443 |
bfd_elf_generic_reloc, /* */ |
| 444 |
"R_MN10300_RELATIVE", /* name */ |
| 445 |
FALSE, /* partial_inplace */ |
| 446 |
0xffffffff, /* src_mask */ |
| 447 |
0xffffffff, /* dst_mask */ |
| 448 |
FALSE), /* pcrel_offset */ |
| 449 |
|
| 450 |
EMPTY_HOWTO (24), |
| 451 |
EMPTY_HOWTO (25), |
| 452 |
EMPTY_HOWTO (26), |
| 453 |
EMPTY_HOWTO (27), |
| 454 |
EMPTY_HOWTO (28), |
| 455 |
EMPTY_HOWTO (29), |
| 456 |
EMPTY_HOWTO (30), |
| 457 |
EMPTY_HOWTO (31), |
| 458 |
EMPTY_HOWTO (32), |
| 459 |
|
| 460 |
HOWTO (R_MN10300_SYM_DIFF, /* type */ |
| 461 |
0, /* rightshift */ |
| 462 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 463 |
32, /* bitsize */ |
| 464 |
FALSE, /* pc_relative */ |
| 465 |
0, /* bitpos */ |
| 466 |
complain_overflow_dont,/* complain_on_overflow */ |
| 467 |
NULL, /* special handler. */ |
| 468 |
"R_MN10300_SYM_DIFF", /* name */ |
| 469 |
FALSE, /* partial_inplace */ |
| 470 |
0xffffffff, /* src_mask */ |
| 471 |
0xffffffff, /* dst_mask */ |
| 472 |
FALSE), /* pcrel_offset */ |
| 473 |
|
| 474 |
HOWTO (R_MN10300_ALIGN, /* type */ |
| 475 |
0, /* rightshift */ |
| 476 |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 477 |
32, /* bitsize */ |
| 478 |
FALSE, /* pc_relative */ |
| 479 |
0, /* bitpos */ |
| 480 |
complain_overflow_dont,/* complain_on_overflow */ |
| 481 |
NULL, /* special handler. */ |
| 482 |
"R_MN10300_ALIGN", /* name */ |
| 483 |
FALSE, /* partial_inplace */ |
| 484 |
0, /* src_mask */ |
| 485 |
0, /* dst_mask */ |
| 486 |
FALSE) /* pcrel_offset */ |
| 487 |
}; |
| 488 |
|
| 489 |
struct mn10300_reloc_map |
| 490 |
{ |
| 491 |
bfd_reloc_code_real_type bfd_reloc_val; |
| 492 |
unsigned char elf_reloc_val; |
| 493 |
}; |
| 494 |
|
| 495 |
static const struct mn10300_reloc_map mn10300_reloc_map[] = |
| 496 |
{ |
| 497 |
{ BFD_RELOC_NONE, R_MN10300_NONE, }, |
| 498 |
{ BFD_RELOC_32, R_MN10300_32, }, |
| 499 |
{ BFD_RELOC_16, R_MN10300_16, }, |
| 500 |
{ BFD_RELOC_8, R_MN10300_8, }, |
| 501 |
{ BFD_RELOC_32_PCREL, R_MN10300_PCREL32, }, |
| 502 |
{ BFD_RELOC_16_PCREL, R_MN10300_PCREL16, }, |
| 503 |
{ BFD_RELOC_8_PCREL, R_MN10300_PCREL8, }, |
| 504 |
{ BFD_RELOC_24, R_MN10300_24, }, |
| 505 |
{ BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT }, |
| 506 |
{ BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY }, |
| 507 |
{ BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 }, |
| 508 |
{ BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 }, |
| 509 |
{ BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 }, |
| 510 |
{ BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 }, |
| 511 |
{ BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 }, |
| 512 |
{ BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 }, |
| 513 |
{ BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 }, |
| 514 |
{ BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 }, |
| 515 |
{ BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 }, |
| 516 |
{ BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 }, |
| 517 |
{ BFD_RELOC_MN10300_COPY, R_MN10300_COPY }, |
| 518 |
{ BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT }, |
| 519 |
{ BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT }, |
| 520 |
{ BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE }, |
| 521 |
{ BFD_RELOC_MN10300_SYM_DIFF, R_MN10300_SYM_DIFF }, |
| 522 |
{ BFD_RELOC_MN10300_ALIGN, R_MN10300_ALIGN } |
| 523 |
}; |
| 524 |
|
| 525 |
/* Create the GOT section. */ |
| 526 |
|
| 527 |
static bfd_boolean |
| 528 |
_bfd_mn10300_elf_create_got_section (bfd * abfd, |
| 529 |
struct bfd_link_info * info) |
| 530 |
{ |
| 531 |
flagword flags; |
| 532 |
flagword pltflags; |
| 533 |
asection * s; |
| 534 |
struct elf_link_hash_entry * h; |
| 535 |
const struct elf_backend_data * bed = get_elf_backend_data (abfd); |
| 536 |
int ptralign; |
| 537 |
|
| 538 |
/* This function may be called more than once. */ |
| 539 |
if (bfd_get_section_by_name (abfd, ".got") != NULL) |
| 540 |
return TRUE; |
| 541 |
|
| 542 |
switch (bed->s->arch_size) |
| 543 |
{ |
| 544 |
case 32: |
| 545 |
ptralign = 2; |
| 546 |
break; |
| 547 |
|
| 548 |
case 64: |
| 549 |
ptralign = 3; |
| 550 |
break; |
| 551 |
|
| 552 |
default: |
| 553 |
bfd_set_error (bfd_error_bad_value); |
| 554 |
return FALSE; |
| 555 |
} |
| 556 |
|
| 557 |
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 558 |
| SEC_LINKER_CREATED); |
| 559 |
|
| 560 |
pltflags = flags; |
| 561 |
pltflags |= SEC_CODE; |
| 562 |
if (bed->plt_not_loaded) |
| 563 |
pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); |
| 564 |
if (bed->plt_readonly) |
| 565 |
pltflags |= SEC_READONLY; |
| 566 |
|
| 567 |
s = bfd_make_section_with_flags (abfd, ".plt", pltflags); |
| 568 |
if (s == NULL |
| 569 |
|| ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
| 570 |
return FALSE; |
| 571 |
|
| 572 |
/* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| 573 |
.plt section. */ |
| 574 |
if (bed->want_plt_sym) |
| 575 |
{ |
| 576 |
h = _bfd_elf_define_linkage_sym (abfd, info, s, |
| 577 |
"_PROCEDURE_LINKAGE_TABLE_"); |
| 578 |
elf_hash_table (info)->hplt = h; |
| 579 |
if (h == NULL) |
| 580 |
return FALSE; |
| 581 |
} |
| 582 |
|
| 583 |
s = bfd_make_section_with_flags (abfd, ".got", flags); |
| 584 |
if (s == NULL |
| 585 |
|| ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 586 |
return FALSE; |
| 587 |
|
| 588 |
if (bed->want_got_plt) |
| 589 |
{ |
| 590 |
s = bfd_make_section_with_flags (abfd, ".got.plt", flags); |
| 591 |
if (s == NULL |
| 592 |
|| ! bfd_set_section_alignment (abfd, s, ptralign)) |
| 593 |
return FALSE; |
| 594 |
} |
| 595 |
|
| 596 |
/* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
| 597 |
(or .got.plt) section. We don't do this in the linker script |
| 598 |
because we don't want to define the symbol if we are not creating |
| 599 |
a global offset table. */ |
| 600 |
h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_"); |
| 601 |
elf_hash_table (info)->hgot = h; |
| 602 |
if (h == NULL) |
| 603 |
return FALSE; |
| 604 |
|
| 605 |
/* The first bit of the global offset table is the header. */ |
| 606 |
s->size += bed->got_header_size; |
| 607 |
|
| 608 |
return TRUE; |
| 609 |
} |
| 610 |
|
| 611 |
static reloc_howto_type * |
| 612 |
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 613 |
bfd_reloc_code_real_type code) |
| 614 |
{ |
| 615 |
unsigned int i; |
| 616 |
|
| 617 |
for (i = ARRAY_SIZE (mn10300_reloc_map); i--;) |
| 618 |
if (mn10300_reloc_map[i].bfd_reloc_val == code) |
| 619 |
return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val]; |
| 620 |
|
| 621 |
return NULL; |
| 622 |
} |
| 623 |
|
| 624 |
static reloc_howto_type * |
| 625 |
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 626 |
const char *r_name) |
| 627 |
{ |
| 628 |
unsigned int i; |
| 629 |
|
| 630 |
for (i = ARRAY_SIZE (elf_mn10300_howto_table); i--;) |
| 631 |
if (elf_mn10300_howto_table[i].name != NULL |
| 632 |
&& strcasecmp (elf_mn10300_howto_table[i].name, r_name) == 0) |
| 633 |
return elf_mn10300_howto_table + i; |
| 634 |
|
| 635 |
return NULL; |
| 636 |
} |
| 637 |
|
| 638 |
/* Set the howto pointer for an MN10300 ELF reloc. */ |
| 639 |
|
| 640 |
static void |
| 641 |
mn10300_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 642 |
arelent *cache_ptr, |
| 643 |
Elf_Internal_Rela *dst) |
| 644 |
{ |
| 645 |
unsigned int r_type; |
| 646 |
|
| 647 |
r_type = ELF32_R_TYPE (dst->r_info); |
| 648 |
BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX); |
| 649 |
cache_ptr->howto = elf_mn10300_howto_table + r_type; |
| 650 |
} |
| 651 |
|
| 652 |
/* Look through the relocs for a section during the first phase. |
| 653 |
Since we don't do .gots or .plts, we just need to consider the |
| 654 |
virtual table relocs for gc. */ |
| 655 |
|
| 656 |
static bfd_boolean |
| 657 |
mn10300_elf_check_relocs (bfd *abfd, |
| 658 |
struct bfd_link_info *info, |
| 659 |
asection *sec, |
| 660 |
const Elf_Internal_Rela *relocs) |
| 661 |
{ |
| 662 |
bfd_boolean sym_diff_reloc_seen; |
| 663 |
Elf_Internal_Shdr *symtab_hdr; |
| 664 |
Elf_Internal_Sym * isymbuf = NULL; |
| 665 |
struct elf_link_hash_entry **sym_hashes; |
| 666 |
const Elf_Internal_Rela *rel; |
| 667 |
const Elf_Internal_Rela *rel_end; |
| 668 |
bfd * dynobj; |
| 669 |
bfd_vma * local_got_offsets; |
| 670 |
asection * sgot; |
| 671 |
asection * srelgot; |
| 672 |
asection * sreloc; |
| 673 |
bfd_boolean result = FALSE; |
| 674 |
|
| 675 |
sgot = NULL; |
| 676 |
srelgot = NULL; |
| 677 |
sreloc = NULL; |
| 678 |
|
| 679 |
if (info->relocatable) |
| 680 |
return TRUE; |
| 681 |
|
| 682 |
symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 683 |
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 684 |
sym_hashes = elf_sym_hashes (abfd); |
| 685 |
|
| 686 |
dynobj = elf_hash_table (info)->dynobj; |
| 687 |
local_got_offsets = elf_local_got_offsets (abfd); |
| 688 |
rel_end = relocs + sec->reloc_count; |
| 689 |
sym_diff_reloc_seen = FALSE; |
| 690 |
|
| 691 |
for (rel = relocs; rel < rel_end; rel++) |
| 692 |
{ |
| 693 |
struct elf_link_hash_entry *h; |
| 694 |
unsigned long r_symndx; |
| 695 |
unsigned int r_type; |
| 696 |
|
| 697 |
r_symndx = ELF32_R_SYM (rel->r_info); |
| 698 |
if (r_symndx < symtab_hdr->sh_info) |
| 699 |
h = NULL; |
| 700 |
else |
| 701 |
{ |
| 702 |
h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 703 |
while (h->root.type == bfd_link_hash_indirect |
| 704 |
|| h->root.type == bfd_link_hash_warning) |
| 705 |
h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 706 |
} |
| 707 |
|
| 708 |
r_type = ELF32_R_TYPE (rel->r_info); |
| 709 |
|
| 710 |
/* Some relocs require a global offset table. */ |
| 711 |
if (dynobj == NULL) |
| 712 |
{ |
| 713 |
switch (r_type) |
| 714 |
{ |
| 715 |
case R_MN10300_GOT32: |
| 716 |
case R_MN10300_GOT24: |
| 717 |
case R_MN10300_GOT16: |
| 718 |
case R_MN10300_GOTOFF32: |
| 719 |
case R_MN10300_GOTOFF24: |
| 720 |
case R_MN10300_GOTOFF16: |
| 721 |
case R_MN10300_GOTPC32: |
| 722 |
case R_MN10300_GOTPC16: |
| 723 |
elf_hash_table (info)->dynobj = dynobj = abfd; |
| 724 |
if (! _bfd_mn10300_elf_create_got_section (dynobj, info)) |
| 725 |
goto fail; |
| 726 |
break; |
| 727 |
|
| 728 |
default: |
| 729 |
break; |
| 730 |
} |
| 731 |
} |
| 732 |
|
| 733 |
switch (r_type) |
| 734 |
{ |
| 735 |
/* This relocation describes the C++ object vtable hierarchy. |
| 736 |
Reconstruct it for later use during GC. */ |
| 737 |
case R_MN10300_GNU_VTINHERIT: |
| 738 |
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 739 |
goto fail; |
| 740 |
break; |
| 741 |
|
| 742 |
/* This relocation describes which C++ vtable entries are actually |
| 743 |
used. Record for later use during GC. */ |
| 744 |
case R_MN10300_GNU_VTENTRY: |
| 745 |
BFD_ASSERT (h != NULL); |
| 746 |
if (h != NULL |
| 747 |
&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 748 |
goto fail; |
| 749 |
break; |
| 750 |
|
| 751 |
case R_MN10300_GOT32: |
| 752 |
case R_MN10300_GOT24: |
| 753 |
case R_MN10300_GOT16: |
| 754 |
/* This symbol requires a global offset table entry. */ |
| 755 |
|
| 756 |
if (sgot == NULL) |
| 757 |
{ |
| 758 |
sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 759 |
BFD_ASSERT (sgot != NULL); |
| 760 |
} |
| 761 |
|
| 762 |
if (srelgot == NULL |
| 763 |
&& (h != NULL || info->shared)) |
| 764 |
{ |
| 765 |
srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 766 |
if (srelgot == NULL) |
| 767 |
{ |
| 768 |
srelgot = bfd_make_section_with_flags (dynobj, |
| 769 |
".rela.got", |
| 770 |
(SEC_ALLOC |
| 771 |
| SEC_LOAD |
| 772 |
| SEC_HAS_CONTENTS |
| 773 |
| SEC_IN_MEMORY |
| 774 |
| SEC_LINKER_CREATED |
| 775 |
| SEC_READONLY)); |
| 776 |
if (srelgot == NULL |
| 777 |
|| ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 778 |
goto fail; |
| 779 |
} |
| 780 |
} |
| 781 |
|
| 782 |
if (h != NULL) |
| 783 |
{ |
| 784 |
if (h->got.offset != (bfd_vma) -1) |
| 785 |
/* We have already allocated space in the .got. */ |
| 786 |
break; |
| 787 |
|
| 788 |
h->got.offset = sgot->size; |
| 789 |
|
| 790 |
/* Make sure this symbol is output as a dynamic symbol. */ |
| 791 |
if (h->dynindx == -1) |
| 792 |
{ |
| 793 |
if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 794 |
goto fail; |
| 795 |
} |
| 796 |
|
| 797 |
srelgot->size += sizeof (Elf32_External_Rela); |
| 798 |
} |
| 799 |
else |
| 800 |
{ |
| 801 |
/* This is a global offset table entry for a local |
| 802 |
symbol. */ |
| 803 |
if (local_got_offsets == NULL) |
| 804 |
{ |
| 805 |
size_t size; |
| 806 |
unsigned int i; |
| 807 |
|
| 808 |
size = symtab_hdr->sh_info * sizeof (bfd_vma); |
| 809 |
local_got_offsets = bfd_alloc (abfd, size); |
| 810 |
|
| 811 |
if (local_got_offsets == NULL) |
| 812 |
goto fail; |
| 813 |
|
| 814 |
elf_local_got_offsets (abfd) = local_got_offsets; |
| 815 |
|
| 816 |
for (i = 0; i < symtab_hdr->sh_info; i++) |
| 817 |
local_got_offsets[i] = (bfd_vma) -1; |
| 818 |
} |
| 819 |
|
| 820 |
if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
| 821 |
/* We have already allocated space in the .got. */ |
| 822 |
break; |
| 823 |
|
| 824 |
local_got_offsets[r_symndx] = sgot->size; |
| 825 |
|
| 826 |
if (info->shared) |
| 827 |
/* If we are generating a shared object, we need to |
| 828 |
output a R_MN10300_RELATIVE reloc so that the dynamic |
| 829 |
linker can adjust this GOT entry. */ |
| 830 |
srelgot->size += sizeof (Elf32_External_Rela); |
| 831 |
} |
| 832 |
|
| 833 |
sgot->size += 4; |
| 834 |
break; |
| 835 |
|
| 836 |
case R_MN10300_PLT32: |
| 837 |
case R_MN10300_PLT16: |
| 838 |
/* This symbol requires a procedure linkage table entry. We |
| 839 |
actually build the entry in adjust_dynamic_symbol, |
| 840 |
because this might be a case of linking PIC code which is |
| 841 |
never referenced by a dynamic object, in which case we |
| 842 |
don't need to generate a procedure linkage table entry |
| 843 |
after all. */ |
| 844 |
|
| 845 |
/* If this is a local symbol, we resolve it directly without |
| 846 |
creating a procedure linkage table entry. */ |
| 847 |
if (h == NULL) |
| 848 |
continue; |
| 849 |
|
| 850 |
if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
| 851 |
|| ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) |
| 852 |
break; |
| 853 |
|
| 854 |
h->needs_plt = 1; |
| 855 |
break; |
| 856 |
|
| 857 |
case R_MN10300_24: |
| 858 |
case R_MN10300_16: |
| 859 |
case R_MN10300_8: |
| 860 |
case R_MN10300_PCREL32: |
| 861 |
case R_MN10300_PCREL16: |
| 862 |
case R_MN10300_PCREL8: |
| 863 |
if (h != NULL) |
| 864 |
h->non_got_ref = 1; |
| 865 |
break; |
| 866 |
|
| 867 |
case R_MN10300_SYM_DIFF: |
| 868 |
sym_diff_reloc_seen = TRUE; |
| 869 |
break; |
| 870 |
|
| 871 |
case R_MN10300_32: |
| 872 |
if (h != NULL) |
| 873 |
h->non_got_ref = 1; |
| 874 |
|
| 875 |
/* If we are creating a shared library, then we |
| 876 |
need to copy the reloc into the shared library. */ |
| 877 |
if (info->shared |
| 878 |
&& (sec->flags & SEC_ALLOC) != 0 |
| 879 |
/* Do not generate a dynamic reloc for a |
| 880 |
reloc associated with a SYM_DIFF operation. */ |
| 881 |
&& ! sym_diff_reloc_seen) |
| 882 |
{ |
| 883 |
asection * sym_section = NULL; |
| 884 |
|
| 885 |
/* Find the section containing the |
| 886 |
symbol involved in the relocation. */ |
| 887 |
if (h == NULL) |
| 888 |
{ |
| 889 |
Elf_Internal_Sym * isym; |
| 890 |
|
| 891 |
if (isymbuf == NULL) |
| 892 |
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 893 |
symtab_hdr->sh_info, 0, |
| 894 |
NULL, NULL, NULL); |
| 895 |
if (isymbuf) |
| 896 |
{ |
| 897 |
isym = isymbuf + r_symndx; |
| 898 |
/* All we care about is whether this local symbol is absolute. */ |
| 899 |
if (isym->st_shndx == SHN_ABS) |
| 900 |
sym_section = bfd_abs_section_ptr; |
| 901 |
} |
| 902 |
} |
| 903 |
else |
| 904 |
{ |
| 905 |
if (h->root.type == bfd_link_hash_defined |
| 906 |
|| h->root.type == bfd_link_hash_defweak) |
| 907 |
sym_section = h->root.u.def.section; |
| 908 |
} |
| 909 |
|
| 910 |
/* If the symbol is absolute then the relocation can |
| 911 |
be resolved during linking and there is no need for |
| 912 |
a dynamic reloc. */ |
| 913 |
if (sym_section != bfd_abs_section_ptr) |
| 914 |
{ |
| 915 |
/* When creating a shared object, we must copy these |
| 916 |
reloc types into the output file. We create a reloc |
| 917 |
section in dynobj and make room for this reloc. */ |
| 918 |
if (sreloc == NULL) |
| 919 |
{ |
| 920 |
sreloc = _bfd_elf_make_dynamic_reloc_section |
| 921 |
(sec, dynobj, 2, abfd, /*rela?*/ TRUE); |
| 922 |
if (sreloc == NULL) |
| 923 |
goto fail; |
| 924 |
} |
| 925 |
|
| 926 |
sreloc->size += sizeof (Elf32_External_Rela); |
| 927 |
} |
| 928 |
} |
| 929 |
|
| 930 |
break; |
| 931 |
} |
| 932 |
|
| 933 |
if (ELF32_R_TYPE (rel->r_info) != R_MN10300_SYM_DIFF) |
| 934 |
sym_diff_reloc_seen = FALSE; |
| 935 |
} |
| 936 |
|
| 937 |
result = TRUE; |
| 938 |
fail: |
| 939 |
if (isymbuf != NULL) |
| 940 |
free (isymbuf); |
| 941 |
|
| 942 |
return result; |
| 943 |
} |
| 944 |
|
| 945 |
/* Return the section that should be marked against GC for a given |
| 946 |
relocation. */ |
| 947 |
|
| 948 |
static asection * |
| 949 |
mn10300_elf_gc_mark_hook (asection *sec, |
| 950 |
struct bfd_link_info *info, |
| 951 |
Elf_Internal_Rela *rel, |
| 952 |
struct elf_link_hash_entry *h, |
| 953 |
Elf_Internal_Sym *sym) |
| 954 |
{ |
| 955 |
if (h != NULL) |
| 956 |
switch (ELF32_R_TYPE (rel->r_info)) |
| 957 |
{ |
| 958 |
case R_MN10300_GNU_VTINHERIT: |
| 959 |
case R_MN10300_GNU_VTENTRY: |
| 960 |
return NULL; |
| 961 |
} |
| 962 |
|
| 963 |
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 964 |
} |
| 965 |
|
| 966 |
/* Perform a relocation as part of a final link. */ |
| 967 |
|
| 968 |
static bfd_reloc_status_type |
| 969 |
mn10300_elf_final_link_relocate (reloc_howto_type *howto, |
| 970 |
bfd *input_bfd, |
| 971 |
bfd *output_bfd ATTRIBUTE_UNUSED, |
| 972 |
asection *input_section, |
| 973 |
bfd_byte *contents, |
| 974 |
bfd_vma offset, |
| 975 |
bfd_vma value, |
| 976 |
bfd_vma addend, |
| 977 |
struct elf_link_hash_entry * h, |
| 978 |
unsigned long symndx, |
| 979 |
struct bfd_link_info *info, |
| 980 |
asection *sym_sec ATTRIBUTE_UNUSED, |
| 981 |
int is_local ATTRIBUTE_UNUSED) |
| 982 |
{ |
| 983 |
static asection * sym_diff_section; |
| 984 |
static bfd_vma sym_diff_value; |
| 985 |
bfd_boolean is_sym_diff_reloc; |
| 986 |
unsigned long r_type = howto->type; |
| 987 |
bfd_byte * hit_data = contents + offset; |
| 988 |
bfd * dynobj; |
| 989 |
bfd_vma * local_got_offsets; |
| 990 |
asection * sgot; |
| 991 |
asection * splt; |
| 992 |
asection * sreloc; |
| 993 |
|
| 994 |
dynobj = elf_hash_table (info)->dynobj; |
| 995 |
local_got_offsets = elf_local_got_offsets (input_bfd); |
| 996 |
|
| 997 |
sgot = NULL; |
| 998 |
splt = NULL; |
| 999 |
sreloc = NULL; |
| 1000 |
|
| 1001 |
switch (r_type) |
| 1002 |
{ |
| 1003 |
case R_MN10300_24: |
| 1004 |
case R_MN10300_16: |
| 1005 |
case R_MN10300_8: |
| 1006 |
case R_MN10300_PCREL8: |
| 1007 |
case R_MN10300_PCREL16: |
| 1008 |
case R_MN10300_PCREL32: |
| 1009 |
case R_MN10300_GOTOFF32: |
| 1010 |
case R_MN10300_GOTOFF24: |
| 1011 |
case R_MN10300_GOTOFF16: |
| 1012 |
if (info->shared |
| 1013 |
&& (input_section->flags & SEC_ALLOC) != 0 |
| 1014 |
&& h != NULL |
| 1015 |
&& ! SYMBOL_REFERENCES_LOCAL (info, h)) |
| 1016 |
return bfd_reloc_dangerous; |
| 1017 |
} |
| 1018 |
|
| 1019 |
is_sym_diff_reloc = FALSE; |
| 1020 |
if (sym_diff_section != NULL) |
| 1021 |
{ |
| 1022 |
BFD_ASSERT (sym_diff_section == input_section); |
| 1023 |
|
| 1024 |
switch (r_type) |
| 1025 |
{ |
| 1026 |
case R_MN10300_32: |
| 1027 |
case R_MN10300_24: |
| 1028 |
case R_MN10300_16: |
| 1029 |
case R_MN10300_8: |
| 1030 |
value -= sym_diff_value; |
| 1031 |
/* If we are computing a 32-bit value for the location lists |
| 1032 |
and the result is 0 then we add one to the value. A zero |
| 1033 |
value can result because of linker relaxation deleteing |
| 1034 |
prologue instructions and using a value of 1 (for the begin |
| 1035 |
and end offsets in the location list entry) results in a |
| 1036 |
nul entry which does not prevent the following entries from |
| 1037 |
being parsed. */ |
| 1038 |
if (r_type == R_MN10300_32 |
| 1039 |
&& value == 0 |
| 1040 |
&& strcmp (input_section->name, ".debug_loc") == 0) |
| 1041 |
value = 1; |
| 1042 |
sym_diff_section = NULL; |
| 1043 |
is_sym_diff_reloc = TRUE; |
| 1044 |
break; |
| 1045 |
|
| 1046 |
default: |
| 1047 |
sym_diff_section = NULL; |
| 1048 |
break; |
| 1049 |
} |
| 1050 |
} |
| 1051 |
|
| 1052 |
switch (r_type) |
| 1053 |
{ |
| 1054 |
case R_MN10300_SYM_DIFF: |
| 1055 |
BFD_ASSERT (addend == 0); |
| 1056 |
/* Cache the input section and value. |
| 1057 |
The offset is unreliable, since relaxation may |
| 1058 |
have reduced the following reloc's offset. */ |
| 1059 |
sym_diff_section = input_section; |
| 1060 |
sym_diff_value = value; |
| 1061 |
return bfd_reloc_ok; |
| 1062 |
|
| 1063 |
case R_MN10300_ALIGN: |
| 1064 |
case R_MN10300_NONE: |
| 1065 |
return bfd_reloc_ok; |
| 1066 |
|
| 1067 |
case R_MN10300_32: |
| 1068 |
if (info->shared |
| 1069 |
/* Do not generate relocs when an R_MN10300_32 has been used |
| 1070 |
with an R_MN10300_SYM_DIFF to compute a difference of two |
| 1071 |
symbols. */ |
| 1072 |
&& is_sym_diff_reloc == FALSE |
| 1073 |
/* Also, do not generate a reloc when the symbol associated |
| 1074 |
with the R_MN10300_32 reloc is absolute - there is no |
| 1075 |
need for a run time computation in this case. */ |
| 1076 |
&& sym_sec != bfd_abs_section_ptr |
| 1077 |
/* If the section is not going to be allocated at load time |
| 1078 |
then there is no need to generate relocs for it. */ |
| 1079 |
&& (input_section->flags & SEC_ALLOC) != 0) |
| 1080 |
{ |
| 1081 |
Elf_Internal_Rela outrel; |
| 1082 |
bfd_boolean skip, relocate; |
| 1083 |
|
| 1084 |
/* When generating a shared object, these relocations are |
| 1085 |
copied into the output file to be resolved at run |
| 1086 |
time. */ |
| 1087 |
if (sreloc == NULL) |
| 1088 |
{ |
| 1089 |
sreloc = _bfd_elf_get_dynamic_reloc_section |
| 1090 |
(input_bfd, input_section, /*rela?*/ TRUE); |
| 1091 |
if (sreloc == NULL) |
| 1092 |
return FALSE; |
| 1093 |
} |
| 1094 |
|
| 1095 |
skip = FALSE; |
| 1096 |
|
| 1097 |
outrel.r_offset = _bfd_elf_section_offset (input_bfd, info, |
| 1098 |
input_section, offset); |
| 1099 |
if (outrel.r_offset == (bfd_vma) -1) |
| 1100 |
skip = TRUE; |
| 1101 |
|
| 1102 |
outrel.r_offset += (input_section->output_section->vma |
| 1103 |
+ input_section->output_offset); |
| 1104 |
|
| 1105 |
if (skip) |
| 1106 |
{ |
| 1107 |
memset (&outrel, 0, sizeof outrel); |
| 1108 |
relocate = FALSE; |
| 1109 |
} |
| 1110 |
else |
| 1111 |
{ |
| 1112 |
/* h->dynindx may be -1 if this symbol was marked to |
| 1113 |
become local. */ |
| 1114 |
if (h == NULL |
| 1115 |
|| SYMBOL_REFERENCES_LOCAL (info, h)) |
| 1116 |
{ |
| 1117 |
relocate = TRUE; |
| 1118 |
outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE); |
| 1119 |
outrel.r_addend = value + addend; |
| 1120 |
} |
| 1121 |
else |
| 1122 |
{ |
| 1123 |
BFD_ASSERT (h->dynindx != -1); |
| 1124 |
relocate = FALSE; |
| 1125 |
outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32); |
| 1126 |
outrel.r_addend = value + addend; |
| 1127 |
} |
| 1128 |
} |
| 1129 |
|
| 1130 |
bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1131 |
(bfd_byte *) (((Elf32_External_Rela *) sreloc->contents) |
| 1132 |
+ sreloc->reloc_count)); |
| 1133 |
++sreloc->reloc_count; |
| 1134 |
|
| 1135 |
/* If this reloc is against an external symbol, we do |
| 1136 |
not want to fiddle with the addend. Otherwise, we |
| 1137 |
need to include the symbol value so that it becomes |
| 1138 |
an addend for the dynamic reloc. */ |
| 1139 |
if (! relocate) |
| 1140 |
return bfd_reloc_ok; |
| 1141 |
} |
| 1142 |
value += addend; |
| 1143 |
bfd_put_32 (input_bfd, value, hit_data); |
| 1144 |
return bfd_reloc_ok; |
| 1145 |
|
| 1146 |
case R_MN10300_24: |
| 1147 |
value += addend; |
| 1148 |
|
| 1149 |
if ((long) value > 0x7fffff || (long) value < -0x800000) |
| 1150 |
return bfd_reloc_overflow; |
| 1151 |
|
| 1152 |
bfd_put_8 (input_bfd, value & 0xff, hit_data); |
| 1153 |
bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); |
| 1154 |
bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); |
| 1155 |
return bfd_reloc_ok; |
| 1156 |
|
| 1157 |
case R_MN10300_16: |
| 1158 |
value += addend; |
| 1159 |
|
| 1160 |
if ((long) value > 0x7fff || (long) value < -0x8000) |
| 1161 |
return bfd_reloc_overflow; |
| 1162 |
|
| 1163 |
bfd_put_16 (input_bfd, value, hit_data); |
| 1164 |
return bfd_reloc_ok; |
| 1165 |
|
| 1166 |
case R_MN10300_8: |
| 1167 |
value += addend; |
| 1168 |
|
| 1169 |
if ((long) value > 0x7f || (long) value < -0x80) |
| 1170 |
return bfd_reloc_overflow; |
| 1171 |
|
| 1172 |
bfd_put_8 (input_bfd, value, hit_data); |
| 1173 |
return bfd_reloc_ok; |
| 1174 |
|
| 1175 |
case R_MN10300_PCREL8: |
| 1176 |
value -= (input_section->output_section->vma |
| 1177 |
+ input_section->output_offset); |
| 1178 |
value -= offset; |
| 1179 |
value += addend; |
| 1180 |
|
| 1181 |
if ((long) value > 0x7f || (long) value < -0x80) |
| 1182 |
return bfd_reloc_overflow; |
| 1183 |
|
| 1184 |
bfd_put_8 (input_bfd, value, hit_data); |
| 1185 |
return bfd_reloc_ok; |
| 1186 |
|
| 1187 |
case R_MN10300_PCREL16: |
| 1188 |
value -= (input_section->output_section->vma |
| 1189 |
+ input_section->output_offset); |
| 1190 |
value -= offset; |
| 1191 |
value += addend; |
| 1192 |
|
| 1193 |
if ((long) value > 0x7fff || (long) value < -0x8000) |
| 1194 |
return bfd_reloc_overflow; |
| 1195 |
|
| 1196 |
bfd_put_16 (input_bfd, value, hit_data); |
| 1197 |
return bfd_reloc_ok; |
| 1198 |
|
| 1199 |
case R_MN10300_PCREL32: |
| 1200 |
value -= (input_section->output_section->vma |
| 1201 |
+ input_section->output_offset); |
| 1202 |
value -= offset; |
| 1203 |
value += addend; |
| 1204 |
|
| 1205 |
bfd_put_32 (input_bfd, value, hit_data); |
| 1206 |
return bfd_reloc_ok; |
| 1207 |
|
| 1208 |
case R_MN10300_GNU_VTINHERIT: |
| 1209 |
case R_MN10300_GNU_VTENTRY: |
| 1210 |
return bfd_reloc_ok; |
| 1211 |
|
| 1212 |
case R_MN10300_GOTPC32: |
| 1213 |
/* Use global offset table as symbol value. */ |
| 1214 |
value = bfd_get_section_by_name (dynobj, |
| 1215 |
".got")->output_section->vma; |
| 1216 |
value -= (input_section->output_section->vma |
| 1217 |
+ input_section->output_offset); |
| 1218 |
value -= offset; |
| 1219 |
value += addend; |
| 1220 |
|
| 1221 |
bfd_put_32 (input_bfd, value, hit_data); |
| 1222 |
return bfd_reloc_ok; |
| 1223 |
|
| 1224 |
case R_MN10300_GOTPC16: |
| 1225 |
/* Use global offset table as symbol value. */ |
| 1226 |
value = bfd_get_section_by_name (dynobj, |
| 1227 |
".got")->output_section->vma; |
| 1228 |
value -= (input_section->output_section->vma |
| 1229 |
+ input_section->output_offset); |
| 1230 |
value -= offset; |
| 1231 |
value += addend; |
| 1232 |
|
| 1233 |
if ((long) value > 0x7fff || (long) value < -0x8000) |
| 1234 |
return bfd_reloc_overflow; |
| 1235 |
|
| 1236 |
bfd_put_16 (input_bfd, value, hit_data); |
| 1237 |
return bfd_reloc_ok; |
| 1238 |
|
| 1239 |
case R_MN10300_GOTOFF32: |
| 1240 |
value -= bfd_get_section_by_name (dynobj, |
| 1241 |
".got")->output_section->vma; |
| 1242 |
value += addend; |
| 1243 |
|
| 1244 |
bfd_put_32 (input_bfd, value, hit_data); |
| 1245 |
return bfd_reloc_ok; |
| 1246 |
|
| 1247 |
case R_MN10300_GOTOFF24: |
| 1248 |
value -= bfd_get_section_by_name (dynobj, |
| 1249 |
".got")->output_section->vma; |
| 1250 |
value += addend; |
| 1251 |
|
| 1252 |
if ((long) value > 0x7fffff || (long) value < -0x800000) |
| 1253 |
return bfd_reloc_overflow; |
| 1254 |
|
| 1255 |
bfd_put_8 (input_bfd, value, hit_data); |
| 1256 |
bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); |
| 1257 |
bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); |
| 1258 |
return bfd_reloc_ok; |
| 1259 |
|
| 1260 |
case R_MN10300_GOTOFF16: |
| 1261 |
value -= bfd_get_section_by_name (dynobj, |
| 1262 |
".got")->output_section->vma; |
| 1263 |
value += addend; |
| 1264 |
|
| 1265 |
if ((long) value > 0x7fff || (long) value < -0x8000) |
| 1266 |
return bfd_reloc_overflow; |
| 1267 |
|
| 1268 |
bfd_put_16 (input_bfd, value, hit_data); |
| 1269 |
return bfd_reloc_ok; |
| 1270 |
|
| 1271 |
case R_MN10300_PLT32: |
| 1272 |
if (h != NULL |
| 1273 |
&& ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
| 1274 |
&& ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
| 1275 |
&& h->plt.offset != (bfd_vma) -1) |
| 1276 |
{ |
| 1277 |
asection * splt; |
| 1278 |
|
| 1279 |
splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1280 |
|
| 1281 |
value = (splt->output_section->vma |
| 1282 |
+ splt->output_offset |
| 1283 |
+ h->plt.offset) - value; |
| 1284 |
} |
| 1285 |
|
| 1286 |
value -= (input_section->output_section->vma |
| 1287 |
+ input_section->output_offset); |
| 1288 |
value -= offset; |
| 1289 |
value += addend; |
| 1290 |
|
| 1291 |
bfd_put_32 (input_bfd, value, hit_data); |
| 1292 |
return bfd_reloc_ok; |
| 1293 |
|
| 1294 |
case R_MN10300_PLT16: |
| 1295 |
if (h != NULL |
| 1296 |
&& ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
| 1297 |
&& ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
| 1298 |
&& h->plt.offset != (bfd_vma) -1) |
| 1299 |
{ |
| 1300 |
asection * splt; |
| 1301 |
|
| 1302 |
splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1303 |
|
| 1304 |
value = (splt->output_section->vma |
| 1305 |
+ splt->output_offset |
| 1306 |
+ h->plt.offset) - value; |
| 1307 |
} |
| 1308 |
|
| 1309 |
value -= (input_section->output_section->vma |
| 1310 |
+ input_section->output_offset); |
| 1311 |
value -= offset; |
| 1312 |
value += addend; |
| 1313 |
|
| 1314 |
if ((long) value > 0x7fff || (long) value < -0x8000) |
| 1315 |
return bfd_reloc_overflow; |
| 1316 |
|
| 1317 |
bfd_put_16 (input_bfd, value, hit_data); |
| 1318 |
return bfd_reloc_ok; |
| 1319 |
|
| 1320 |
case R_MN10300_GOT32: |
| 1321 |
case R_MN10300_GOT24: |
| 1322 |
case R_MN10300_GOT16: |
| 1323 |
{ |
| 1324 |
asection * sgot; |
| 1325 |
|
| 1326 |
sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1327 |
|
| 1328 |
if (h != NULL) |
| 1329 |
{ |
| 1330 |
bfd_vma off; |
| 1331 |
|
| 1332 |
off = h->got.offset; |
| 1333 |
BFD_ASSERT (off != (bfd_vma) -1); |
| 1334 |
|
| 1335 |
if (! elf_hash_table (info)->dynamic_sections_created |
| 1336 |
|| SYMBOL_REFERENCES_LOCAL (info, h)) |
| 1337 |
/* This is actually a static link, or it is a |
| 1338 |
-Bsymbolic link and the symbol is defined |
| 1339 |
locally, or the symbol was forced to be local |
| 1340 |
because of a version file. We must initialize |
| 1341 |
this entry in the global offset table. |
| 1342 |
|
| 1343 |
When doing a dynamic link, we create a .rela.got |
| 1344 |
relocation entry to initialize the value. This |
| 1345 |
is done in the finish_dynamic_symbol routine. */ |
| 1346 |
bfd_put_32 (output_bfd, value, |
| 1347 |
sgot->contents + off); |
| 1348 |
|
| 1349 |
value = sgot->output_offset + off; |
| 1350 |
} |
| 1351 |
else |
| 1352 |
{ |
| 1353 |
bfd_vma off; |
| 1354 |
|
| 1355 |
off = elf_local_got_offsets (input_bfd)[symndx]; |
| 1356 |
|
| 1357 |
bfd_put_32 (output_bfd, value, sgot->contents + off); |
| 1358 |
|
| 1359 |
if (info->shared) |
| 1360 |
{ |
| 1361 |
asection * srelgot; |
| 1362 |
Elf_Internal_Rela outrel; |
| 1363 |
|
| 1364 |
srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1365 |
BFD_ASSERT (srelgot != NULL); |
| 1366 |
|
| 1367 |
outrel.r_offset = (sgot->output_section->vma |
| 1368 |
+ sgot->output_offset |
| 1369 |
+ off); |
| 1370 |
outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE); |
| 1371 |
outrel.r_addend = value; |
| 1372 |
bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1373 |
(bfd_byte *) (((Elf32_External_Rela *) |
| 1374 |
srelgot->contents) |
| 1375 |
+ srelgot->reloc_count)); |
| 1376 |
++ srelgot->reloc_count; |
| 1377 |
} |
| 1378 |
|
| 1379 |
value = sgot->output_offset + off; |
| 1380 |
} |
| 1381 |
} |
| 1382 |
|
| 1383 |
value += addend; |
| 1384 |
|
| 1385 |
if (r_type == R_MN10300_GOT32) |
| 1386 |
{ |
| 1387 |
bfd_put_32 (input_bfd, value, hit_data); |
| 1388 |
return bfd_reloc_ok; |
| 1389 |
} |
| 1390 |
else if (r_type == R_MN10300_GOT24) |
| 1391 |
{ |
| 1392 |
if ((long) value > 0x7fffff || (long) value < -0x800000) |
| 1393 |
return bfd_reloc_overflow; |
| 1394 |
|
| 1395 |
bfd_put_8 (input_bfd, value & 0xff, hit_data); |
| 1396 |
bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1); |
| 1397 |
bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2); |
| 1398 |
return bfd_reloc_ok; |
| 1399 |
} |
| 1400 |
else if (r_type == R_MN10300_GOT16) |
| 1401 |
{ |
| 1402 |
if ((long) value > 0x7fff || (long) value < -0x8000) |
| 1403 |
return bfd_reloc_overflow; |
| 1404 |
|
| 1405 |
bfd_put_16 (input_bfd, value, hit_data); |
| 1406 |
return bfd_reloc_ok; |
| 1407 |
} |
| 1408 |
/* Fall through. */ |
| 1409 |
|
| 1410 |
default: |
| 1411 |
return bfd_reloc_notsupported; |
| 1412 |
} |
| 1413 |
} |
| 1414 |
|
| 1415 |
/* Relocate an MN10300 ELF section. */ |
| 1416 |
|
| 1417 |
static bfd_boolean |
| 1418 |
mn10300_elf_relocate_section (bfd *output_bfd, |
| 1419 |
struct bfd_link_info *info, |
| 1420 |
bfd *input_bfd, |
| 1421 |
asection *input_section, |
| 1422 |
bfd_byte *contents, |
| 1423 |
Elf_Internal_Rela *relocs, |
| 1424 |
Elf_Internal_Sym *local_syms, |
| 1425 |
asection **local_sections) |
| 1426 |
{ |
| 1427 |
Elf_Internal_Shdr *symtab_hdr; |
| 1428 |
struct elf_link_hash_entry **sym_hashes; |
| 1429 |
Elf_Internal_Rela *rel, *relend; |
| 1430 |
|
| 1431 |
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1432 |
sym_hashes = elf_sym_hashes (input_bfd); |
| 1433 |
|
| 1434 |
rel = relocs; |
| 1435 |
relend = relocs + input_section->reloc_count; |
| 1436 |
for (; rel < relend; rel++) |
| 1437 |
{ |
| 1438 |
int r_type; |
| 1439 |
reloc_howto_type *howto; |
| 1440 |
unsigned long r_symndx; |
| 1441 |
Elf_Internal_Sym *sym; |
| 1442 |
asection *sec; |
| 1443 |
struct elf32_mn10300_link_hash_entry *h; |
| 1444 |
bfd_vma relocation; |
| 1445 |
bfd_reloc_status_type r; |
| 1446 |
|
| 1447 |
r_symndx = ELF32_R_SYM (rel->r_info); |
| 1448 |
r_type = ELF32_R_TYPE (rel->r_info); |
| 1449 |
howto = elf_mn10300_howto_table + r_type; |
| 1450 |
|
| 1451 |
/* Just skip the vtable gc relocs. */ |
| 1452 |
if (r_type == R_MN10300_GNU_VTINHERIT |
| 1453 |
|| r_type == R_MN10300_GNU_VTENTRY) |
| 1454 |
continue; |
| 1455 |
|
| 1456 |
h = NULL; |
| 1457 |
sym = NULL; |
| 1458 |
sec = NULL; |
| 1459 |
if (r_symndx < symtab_hdr->sh_info) |
| 1460 |
{ |
| 1461 |
sym = local_syms + r_symndx; |
| 1462 |
sec = local_sections[r_symndx]; |
| 1463 |
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1464 |
} |
| 1465 |
else |
| 1466 |
{ |
| 1467 |
bfd_boolean unresolved_reloc; |
| 1468 |
bfd_boolean warned; |
| 1469 |
struct elf_link_hash_entry *hh; |
| 1470 |
|
| 1471 |
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1472 |
r_symndx, symtab_hdr, sym_hashes, |
| 1473 |
hh, sec, relocation, |
| 1474 |
unresolved_reloc, warned); |
| 1475 |
|
| 1476 |
h = (struct elf32_mn10300_link_hash_entry *) hh; |
| 1477 |
|
| 1478 |
if ((h->root.root.type == bfd_link_hash_defined |
| 1479 |
|| h->root.root.type == bfd_link_hash_defweak) |
| 1480 |
&& ( r_type == R_MN10300_GOTPC32 |
| 1481 |
|| r_type == R_MN10300_GOTPC16 |
| 1482 |
|| (( r_type == R_MN10300_PLT32 |
| 1483 |
|| r_type == R_MN10300_PLT16) |
| 1484 |
&& ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL |
| 1485 |
&& ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN |
| 1486 |
&& h->root.plt.offset != (bfd_vma) -1) |
| 1487 |
|| (( r_type == R_MN10300_GOT32 |
| 1488 |
|| r_type == R_MN10300_GOT24 |
| 1489 |
|| r_type == R_MN10300_GOT16) |
| 1490 |
&& elf_hash_table (info)->dynamic_sections_created |
| 1491 |
&& !SYMBOL_REFERENCES_LOCAL (info, hh)) |
| 1492 |
|| (r_type == R_MN10300_32 |
| 1493 |
/* _32 relocs in executables force _COPY relocs, |
| 1494 |
such that the address of the symbol ends up |
| 1495 |
being local. */ |
| 1496 |
&& !info->executable |
| 1497 |
&& !SYMBOL_REFERENCES_LOCAL (info, hh) |
| 1498 |
&& ((input_section->flags & SEC_ALLOC) != 0 |
| 1499 |
/* DWARF will emit R_MN10300_32 relocations |
| 1500 |
in its sections against symbols defined |
| 1501 |
externally in shared libraries. We can't |
| 1502 |
do anything with them here. */ |
| 1503 |
|| ((input_section->flags & SEC_DEBUGGING) != 0 |
| 1504 |
&& h->root.def_dynamic))))) |
| 1505 |
/* In these cases, we don't need the relocation |
| 1506 |
value. We check specially because in some |
| 1507 |
obscure cases sec->output_section will be NULL. */ |
| 1508 |
relocation = 0; |
| 1509 |
|
| 1510 |
else if (!info->relocatable && unresolved_reloc) |
| 1511 |
(*_bfd_error_handler) |
| 1512 |
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 1513 |
input_bfd, |
| 1514 |
input_section, |
| 1515 |
(long) rel->r_offset, |
| 1516 |
howto->name, |
| 1517 |
h->root.root.root.string); |
| 1518 |
} |
| 1519 |
|
| 1520 |
if (sec != NULL && elf_discarded_section (sec)) |
| 1521 |
{ |
| 1522 |
/* For relocs against symbols from removed linkonce sections, |
| 1523 |
or sections discarded by a linker script, we just want the |
| 1524 |
section contents zeroed. Avoid any special processing. */ |
| 1525 |
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); |
| 1526 |
rel->r_info = 0; |
| 1527 |
rel->r_addend = 0; |
| 1528 |
continue; |
| 1529 |
} |
| 1530 |
|
| 1531 |
if (info->relocatable) |
| 1532 |
continue; |
| 1533 |
|
| 1534 |
r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 1535 |
input_section, |
| 1536 |
contents, rel->r_offset, |
| 1537 |
relocation, rel->r_addend, |
| 1538 |
(struct elf_link_hash_entry *) h, |
| 1539 |
r_symndx, |
| 1540 |
info, sec, h == NULL); |
| 1541 |
|
| 1542 |
if (r != bfd_reloc_ok) |
| 1543 |
{ |
| 1544 |
const char *name; |
| 1545 |
const char *msg = NULL; |
| 1546 |
|
| 1547 |
if (h != NULL) |
| 1548 |
name = h->root.root.root.string; |
| 1549 |
else |
| 1550 |
{ |
| 1551 |
name = (bfd_elf_string_from_elf_section |
| 1552 |
(input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 1553 |
if (name == NULL || *name == '\0') |
| 1554 |
name = bfd_section_name (input_bfd, sec); |
| 1555 |
} |
| 1556 |
|
| 1557 |
switch (r) |
| 1558 |
{ |
| 1559 |
case bfd_reloc_overflow: |
| 1560 |
if (! ((*info->callbacks->reloc_overflow) |
| 1561 |
(info, (h ? &h->root.root : NULL), name, |
| 1562 |
howto->name, (bfd_vma) 0, input_bfd, |
| 1563 |
input_section, rel->r_offset))) |
| 1564 |
return FALSE; |
| 1565 |
break; |
| 1566 |
|
| 1567 |
case bfd_reloc_undefined: |
| 1568 |
if (! ((*info->callbacks->undefined_symbol) |
| 1569 |
(info, name, input_bfd, input_section, |
| 1570 |
rel->r_offset, TRUE))) |
| 1571 |
return FALSE; |
| 1572 |
break; |
| 1573 |
|
| 1574 |
case bfd_reloc_outofrange: |
| 1575 |
msg = _("internal error: out of range error"); |
| 1576 |
goto common_error; |
| 1577 |
|
| 1578 |
case bfd_reloc_notsupported: |
| 1579 |
msg = _("internal error: unsupported relocation error"); |
| 1580 |
goto common_error; |
| 1581 |
|
| 1582 |
case bfd_reloc_dangerous: |
| 1583 |
if (r_type == R_MN10300_PCREL32) |
| 1584 |
msg = _("error: inappropriate relocation type for shared" |
| 1585 |
" library (did you forget -fpic?)"); |
| 1586 |
else |
| 1587 |
msg = _("internal error: suspicious relocation type used" |
| 1588 |
" in shared library"); |
| 1589 |
goto common_error; |
| 1590 |
|
| 1591 |
default: |
| 1592 |
msg = _("internal error: unknown error"); |
| 1593 |
/* Fall through. */ |
| 1594 |
|
| 1595 |
common_error: |
| 1596 |
if (!((*info->callbacks->warning) |
| 1597 |
(info, msg, name, input_bfd, input_section, |
| 1598 |
rel->r_offset))) |
| 1599 |
return FALSE; |
| 1600 |
break; |
| 1601 |
} |
| 1602 |
} |
| 1603 |
} |
| 1604 |
|
| 1605 |
return TRUE; |
| 1606 |
} |
| 1607 |
|
| 1608 |
/* Finish initializing one hash table entry. */ |
| 1609 |
|
| 1610 |
static bfd_boolean |
| 1611 |
elf32_mn10300_finish_hash_table_entry (struct bfd_hash_entry *gen_entry, |
| 1612 |
void * in_args) |
| 1613 |
{ |
| 1614 |
struct elf32_mn10300_link_hash_entry *entry; |
| 1615 |
struct bfd_link_info *link_info = (struct bfd_link_info *) in_args; |
| 1616 |
unsigned int byte_count = 0; |
| 1617 |
|
| 1618 |
entry = (struct elf32_mn10300_link_hash_entry *) gen_entry; |
| 1619 |
|
| 1620 |
if (entry->root.root.type == bfd_link_hash_warning) |
| 1621 |
entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link; |
| 1622 |
|
| 1623 |
/* If we already know we want to convert "call" to "calls" for calls |
| 1624 |
to this symbol, then return now. */ |
| 1625 |
if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS) |
| 1626 |
return TRUE; |
| 1627 |
|
| 1628 |
/* If there are no named calls to this symbol, or there's nothing we |
| 1629 |
can move from the function itself into the "call" instruction, |
| 1630 |
then note that all "call" instructions should be converted into |
| 1631 |
"calls" instructions and return. If a symbol is available for |
| 1632 |
dynamic symbol resolution (overridable or overriding), avoid |
| 1633 |
custom calling conventions. */ |
| 1634 |
if (entry->direct_calls == 0 |
| 1635 |
|| (entry->stack_size == 0 && entry->movm_args == 0) |
| 1636 |
|| (elf_hash_table (link_info)->dynamic_sections_created |
| 1637 |
&& ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL |
| 1638 |
&& ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN)) |
| 1639 |
{ |
| 1640 |
/* Make a note that we should convert "call" instructions to "calls" |
| 1641 |
instructions for calls to this symbol. */ |
| 1642 |
entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; |
| 1643 |
return TRUE; |
| 1644 |
} |
| 1645 |
|
| 1646 |
/* We may be able to move some instructions from the function itself into |
| 1647 |
the "call" instruction. Count how many bytes we might be able to |
| 1648 |
eliminate in the function itself. */ |
| 1649 |
|
| 1650 |
/* A movm instruction is two bytes. */ |
| 1651 |
if (entry->movm_args) |
| 1652 |
byte_count += 2; |
| 1653 |
|
| 1654 |
/* Count the insn to allocate stack space too. */ |
| 1655 |
if (entry->stack_size > 0) |
| 1656 |
{ |
| 1657 |
if (entry->stack_size <= 128) |
| 1658 |
byte_count += 3; |
| 1659 |
else |
| 1660 |
byte_count += 4; |
| 1661 |
} |
| 1662 |
|
| 1663 |
/* If using "call" will result in larger code, then turn all |
| 1664 |
the associated "call" instructions into "calls" instructions. */ |
| 1665 |
if (byte_count < entry->direct_calls) |
| 1666 |
entry->flags |= MN10300_CONVERT_CALL_TO_CALLS; |
| 1667 |
|
| 1668 |
/* This routine never fails. */ |
| 1669 |
return TRUE; |
| 1670 |
} |
| 1671 |
|
| 1672 |
/* Used to count hash table entries. */ |
| 1673 |
|
| 1674 |
static bfd_boolean |
| 1675 |
elf32_mn10300_count_hash_table_entries (struct bfd_hash_entry *gen_entry ATTRIBUTE_UNUSED, |
| 1676 |
void * in_args) |
| 1677 |
{ |
| 1678 |
int *count = (int *) in_args; |
| 1679 |
|
| 1680 |
(*count) ++; |
| 1681 |
return TRUE; |
| 1682 |
} |
| 1683 |
|
| 1684 |
/* Used to enumerate hash table entries into a linear array. */ |
| 1685 |
|
| 1686 |
static bfd_boolean |
| 1687 |
elf32_mn10300_list_hash_table_entries (struct bfd_hash_entry *gen_entry, |
| 1688 |
void * in_args) |
| 1689 |
{ |
| 1690 |
struct bfd_hash_entry ***ptr = (struct bfd_hash_entry ***) in_args; |
| 1691 |
|
| 1692 |
**ptr = gen_entry; |
| 1693 |
(*ptr) ++; |
| 1694 |
return TRUE; |
| 1695 |
} |
| 1696 |
|
| 1697 |
/* Used to sort the array created by the above. */ |
| 1698 |
|
| 1699 |
static int |
| 1700 |
sort_by_value (const void *va, const void *vb) |
| 1701 |
{ |
| 1702 |
struct elf32_mn10300_link_hash_entry *a |
| 1703 |
= *(struct elf32_mn10300_link_hash_entry **) va; |
| 1704 |
struct elf32_mn10300_link_hash_entry *b |
| 1705 |
= *(struct elf32_mn10300_link_hash_entry **) vb; |
| 1706 |
|
| 1707 |
return a->value - b->value; |
| 1708 |
} |
| 1709 |
|
| 1710 |
/* Compute the stack size and movm arguments for the function |
| 1711 |
referred to by HASH at address ADDR in section with |
| 1712 |
contents CONTENTS, store the information in the hash table. */ |
| 1713 |
|
| 1714 |
static void |
| 1715 |
compute_function_info (bfd *abfd, |
| 1716 |
struct elf32_mn10300_link_hash_entry *hash, |
| 1717 |
bfd_vma addr, |
| 1718 |
unsigned char *contents) |
| 1719 |
{ |
| 1720 |
unsigned char byte1, byte2; |
| 1721 |
/* We only care about a very small subset of the possible prologue |
| 1722 |
sequences here. Basically we look for: |
| 1723 |
|
| 1724 |
movm [d2,d3,a2,a3],sp (optional) |
| 1725 |
add <size>,sp (optional, and only for sizes which fit in an unsigned |
| 1726 |
8 bit number) |
| 1727 |
|
| 1728 |
If we find anything else, we quit. */ |
| 1729 |
|
| 1730 |
/* Look for movm [regs],sp. */ |
| 1731 |
byte1 = bfd_get_8 (abfd, contents + addr); |
| 1732 |
byte2 = bfd_get_8 (abfd, contents + addr + 1); |
| 1733 |
|
| 1734 |
if (byte1 == 0xcf) |
| 1735 |
{ |
| 1736 |
hash->movm_args = byte2; |
| 1737 |
addr += 2; |
| 1738 |
byte1 = bfd_get_8 (abfd, contents + addr); |
| 1739 |
byte2 = bfd_get_8 (abfd, contents + addr + 1); |
| 1740 |
} |
| 1741 |
|
| 1742 |
/* Now figure out how much stack space will be allocated by the movm |
| 1743 |
instruction. We need this kept separate from the function's normal |
| 1744 |
stack space. */ |
| 1745 |
if (hash->movm_args) |
| 1746 |
{ |
| 1747 |
/* Space for d2. */ |
| 1748 |
if (hash->movm_args & 0x80) |
| 1749 |
hash->movm_stack_size += 4; |
| 1750 |
|
| 1751 |
/* Space for d3. */ |
| 1752 |
if (hash->movm_args & 0x40) |
| 1753 |
hash->movm_stack_size += 4; |
| 1754 |
|
| 1755 |
/* Space for a2. */ |
| 1756 |
if (hash->movm_args & 0x20) |
| 1757 |
hash->movm_stack_size += 4; |
| 1758 |
|
| 1759 |
/* Space for a3. */ |
| 1760 |
if (hash->movm_args & 0x10) |
| 1761 |
hash->movm_stack_size += 4; |
| 1762 |
|
| 1763 |
/* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */ |
| 1764 |
if (hash->movm_args & 0x08) |
| 1765 |
hash->movm_stack_size += 8 * 4; |
| 1766 |
|
| 1767 |
if (bfd_get_mach (abfd) == bfd_mach_am33 |
| 1768 |
|| bfd_get_mach (abfd) == bfd_mach_am33_2) |
| 1769 |
{ |
| 1770 |
/* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */ |
| 1771 |
if (hash->movm_args & 0x1) |
| 1772 |
hash->movm_stack_size += 6 * 4; |
| 1773 |
|
| 1774 |
/* exreg1 space. e4, e5, e6, e7 */ |
| 1775 |
if (hash->movm_args & 0x2) |
| 1776 |
hash->movm_stack_size += 4 * 4; |
| 1777 |
|
| 1778 |
/* exreg0 space. e2, e3 */ |
| 1779 |
if (hash->movm_args & 0x4) |
| 1780 |
hash->movm_stack_size += 2 * 4; |
| 1781 |
} |
| 1782 |
} |
| 1783 |
|
| 1784 |
/* Now look for the two stack adjustment variants. */ |
| 1785 |
if (byte1 == 0xf8 && byte2 == 0xfe) |
| 1786 |
{ |
| 1787 |
int temp = bfd_get_8 (abfd, contents + addr + 2); |
| 1788 |
temp = ((temp & 0xff) ^ (~0x7f)) + 0x80; |
| 1789 |
|
| 1790 |
hash->stack_size = -temp; |
| 1791 |
} |
| 1792 |
else if (byte1 == 0xfa && byte2 == 0xfe) |
| 1793 |
{ |
| 1794 |
int temp = bfd_get_16 (abfd, contents + addr + 2); |
| 1795 |
temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000; |
| 1796 |
temp = -temp; |
| 1797 |
|
| 1798 |
if (temp < 255) |
| 1799 |
hash->stack_size = temp; |
| 1800 |
} |
| 1801 |
|
| 1802 |
/* If the total stack to be allocated by the call instruction is more |
| 1803 |
than 255 bytes, then we can't remove the stack adjustment by using |
| 1804 |
"call" (we might still be able to remove the "movm" instruction. */ |
| 1805 |
if (hash->stack_size + hash->movm_stack_size > 255) |
| 1806 |
hash->stack_size = 0; |
| 1807 |
} |
| 1808 |
|
| 1809 |
/* Delete some bytes from a section while relaxing. */ |
| 1810 |
|
| 1811 |
static bfd_boolean |
| 1812 |
mn10300_elf_relax_delete_bytes (bfd *abfd, |
| 1813 |
asection *sec, |
| 1814 |
bfd_vma addr, |
| 1815 |
int count) |
| 1816 |
{ |
| 1817 |
Elf_Internal_Shdr *symtab_hdr; |
| 1818 |
unsigned int sec_shndx; |
| 1819 |
bfd_byte *contents; |
| 1820 |
Elf_Internal_Rela *irel, *irelend; |
| 1821 |
Elf_Internal_Rela *irelalign; |
| 1822 |
bfd_vma toaddr; |
| 1823 |
Elf_Internal_Sym *isym, *isymend; |
| 1824 |
struct elf_link_hash_entry **sym_hashes; |
| 1825 |
struct elf_link_hash_entry **end_hashes; |
| 1826 |
unsigned int symcount; |
| 1827 |
|
| 1828 |
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1829 |
|
| 1830 |
contents = elf_section_data (sec)->this_hdr.contents; |
| 1831 |
|
| 1832 |
irelalign = NULL; |
| 1833 |
toaddr = sec->size; |
| 1834 |
|
| 1835 |
irel = elf_section_data (sec)->relocs; |
| 1836 |
irelend = irel + sec->reloc_count; |
| 1837 |
|
| 1838 |
if (sec->reloc_count > 0) |
| 1839 |
{ |
| 1840 |
/* If there is an align reloc at the end of the section ignore it. |
| 1841 |
GAS creates these relocs for reasons of its own, and they just |
| 1842 |
serve to keep the section artifically inflated. */ |
| 1843 |
if (ELF32_R_TYPE ((irelend - 1)->r_info) == (int) R_MN10300_ALIGN) |
| 1844 |
--irelend; |
| 1845 |
|
| 1846 |
/* The deletion must stop at the next ALIGN reloc for an aligment |
| 1847 |
power larger than, or not a multiple of, the number of bytes we |
| 1848 |
are deleting. */ |
| 1849 |
for (; irel < irelend; irel++) |
| 1850 |
{ |
| 1851 |
int alignment = 1 << irel->r_addend; |
| 1852 |
|
| 1853 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN |
| 1854 |
&& irel->r_offset > addr |
| 1855 |
&& irel->r_offset < toaddr |
| 1856 |
&& (count < alignment |
| 1857 |
|| alignment % count != 0)) |
| 1858 |
{ |
| 1859 |
irelalign = irel; |
| 1860 |
toaddr = irel->r_offset; |
| 1861 |
break; |
| 1862 |
} |
| 1863 |
} |
| 1864 |
} |
| 1865 |
|
| 1866 |
/* Actually delete the bytes. */ |
| 1867 |
memmove (contents + addr, contents + addr + count, |
| 1868 |
(size_t) (toaddr - addr - count)); |
| 1869 |
|
| 1870 |
/* Adjust the section's size if we are shrinking it, or else |
| 1871 |
pad the bytes between the end of the shrunken region and |
| 1872 |
the start of the next region with NOP codes. */ |
| 1873 |
if (irelalign == NULL) |
| 1874 |
{ |
| 1875 |
sec->size -= count; |
| 1876 |
/* Include symbols at the end of the section, but |
| 1877 |
not at the end of a sub-region of the section. */ |
| 1878 |
toaddr ++; |
| 1879 |
} |
| 1880 |
else |
| 1881 |
{ |
| 1882 |
int i; |
| 1883 |
|
| 1884 |
#define NOP_OPCODE 0xcb |
| 1885 |
|
| 1886 |
for (i = 0; i < count; i ++) |
| 1887 |
bfd_put_8 (abfd, (bfd_vma) NOP_OPCODE, contents + toaddr - count + i); |
| 1888 |
} |
| 1889 |
|
| 1890 |
/* Adjust all the relocs. */ |
| 1891 |
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 1892 |
{ |
| 1893 |
/* Get the new reloc address. */ |
| 1894 |
if ((irel->r_offset > addr |
| 1895 |
&& irel->r_offset < toaddr) |
| 1896 |
|| (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN |
| 1897 |
&& irel->r_offset == toaddr)) |
| 1898 |
irel->r_offset -= count; |
| 1899 |
} |
| 1900 |
|
| 1901 |
/* Adjust the local symbols in the section, reducing their value |
| 1902 |
by the number of bytes deleted. Note - symbols within the deleted |
| 1903 |
region are moved to the address of the start of the region, which |
| 1904 |
actually means that they will address the byte beyond the end of |
| 1905 |
the region once the deletion has been completed. */ |
| 1906 |
symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1907 |
isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1908 |
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 1909 |
{ |
| 1910 |
if (isym->st_shndx == sec_shndx |
| 1911 |
&& isym->st_value > addr |
| 1912 |
&& isym->st_value < toaddr) |
| 1913 |
{ |
| 1914 |
if (isym->st_value < addr + count) |
| 1915 |
isym->st_value = addr; |
| 1916 |
else |
| 1917 |
isym->st_value -= count; |
| 1918 |
} |
| 1919 |
/* Adjust the function symbol's size as well. */ |
| 1920 |
else if (isym->st_shndx == sec_shndx |
| 1921 |
&& ELF_ST_TYPE (isym->st_info) == STT_FUNC |
| 1922 |
&& isym->st_value + isym->st_size > addr |
| 1923 |
&& isym->st_value + isym->st_size < toaddr) |
| 1924 |
isym->st_size -= count; |
| 1925 |
} |
| 1926 |
|
| 1927 |
/* Now adjust the global symbols defined in this section. */ |
| 1928 |
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1929 |
- symtab_hdr->sh_info); |
| 1930 |
sym_hashes = elf_sym_hashes (abfd); |
| 1931 |
end_hashes = sym_hashes + symcount; |
| 1932 |
for (; sym_hashes < end_hashes; sym_hashes++) |
| 1933 |
{ |
| 1934 |
struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 1935 |
|
| 1936 |
if ((sym_hash->root.type == bfd_link_hash_defined |
| 1937 |
|| sym_hash->root.type == bfd_link_hash_defweak) |
| 1938 |
&& sym_hash->root.u.def.section == sec |
| 1939 |
&& sym_hash->root.u.def.value > addr |
| 1940 |
&& sym_hash->root.u.def.value < toaddr) |
| 1941 |
{ |
| 1942 |
if (sym_hash->root.u.def.value < addr + count) |
| 1943 |
sym_hash->root.u.def.value = addr; |
| 1944 |
else |
| 1945 |
sym_hash->root.u.def.value -= count; |
| 1946 |
} |
| 1947 |
/* Adjust the function symbol's size as well. */ |
| 1948 |
else if (sym_hash->root.type == bfd_link_hash_defined |
| 1949 |
&& sym_hash->root.u.def.section == sec |
| 1950 |
&& sym_hash->type == STT_FUNC |
| 1951 |
&& sym_hash->root.u.def.value + sym_hash->size > addr |
| 1952 |
&& sym_hash->root.u.def.value + sym_hash->size < toaddr) |
| 1953 |
sym_hash->size -= count; |
| 1954 |
} |
| 1955 |
|
| 1956 |
/* See if we can move the ALIGN reloc forward. |
| 1957 |
We have adjusted r_offset for it already. */ |
| 1958 |
if (irelalign != NULL) |
| 1959 |
{ |
| 1960 |
bfd_vma alignto, alignaddr; |
| 1961 |
|
| 1962 |
if ((int) irelalign->r_addend > 0) |
| 1963 |
{ |
| 1964 |
/* This is the old address. */ |
| 1965 |
alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend); |
| 1966 |
/* This is where the align points to now. */ |
| 1967 |
alignaddr = BFD_ALIGN (irelalign->r_offset, |
| 1968 |
1 << irelalign->r_addend); |
| 1969 |
if (alignaddr < alignto) |
| 1970 |
/* Tail recursion. */ |
| 1971 |
return mn10300_elf_relax_delete_bytes (abfd, sec, alignaddr, |
| 1972 |
(int) (alignto - alignaddr)); |
| 1973 |
} |
| 1974 |
} |
| 1975 |
|
| 1976 |
return TRUE; |
| 1977 |
} |
| 1978 |
|
| 1979 |
/* Return TRUE if a symbol exists at the given address, else return |
| 1980 |
FALSE. */ |
| 1981 |
|
| 1982 |
static bfd_boolean |
| 1983 |
mn10300_elf_symbol_address_p (bfd *abfd, |
| 1984 |
asection *sec, |
| 1985 |
Elf_Internal_Sym *isym, |
| 1986 |
bfd_vma addr) |
| 1987 |
{ |
| 1988 |
Elf_Internal_Shdr *symtab_hdr; |
| 1989 |
unsigned int sec_shndx; |
| 1990 |
Elf_Internal_Sym *isymend; |
| 1991 |
struct elf_link_hash_entry **sym_hashes; |
| 1992 |
struct elf_link_hash_entry **end_hashes; |
| 1993 |
unsigned int symcount; |
| 1994 |
|
| 1995 |
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1996 |
|
| 1997 |
/* Examine all the symbols. */ |
| 1998 |
symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1999 |
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 2000 |
if (isym->st_shndx == sec_shndx |
| 2001 |
&& isym->st_value == addr) |
| 2002 |
return TRUE; |
| 2003 |
|
| 2004 |
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 2005 |
- symtab_hdr->sh_info); |
| 2006 |
sym_hashes = elf_sym_hashes (abfd); |
| 2007 |
end_hashes = sym_hashes + symcount; |
| 2008 |
for (; sym_hashes < end_hashes; sym_hashes++) |
| 2009 |
{ |
| 2010 |
struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 2011 |
|
| 2012 |
if ((sym_hash->root.type == bfd_link_hash_defined |
| 2013 |
|| sym_hash->root.type == bfd_link_hash_defweak) |
| 2014 |
&& sym_hash->root.u.def.section == sec |
| 2015 |
&& sym_hash->root.u.def.value == addr) |
| 2016 |
return TRUE; |
| 2017 |
} |
| 2018 |
|
| 2019 |
return FALSE; |
| 2020 |
} |
| 2021 |
|
| 2022 |
/* This function handles relaxing for the mn10300. |
| 2023 |
|
| 2024 |
There are quite a few relaxing opportunities available on the mn10300: |
| 2025 |
|
| 2026 |
* calls:32 -> calls:16 2 bytes |
| 2027 |
* call:32 -> call:16 2 bytes |
| 2028 |
|
| 2029 |
* call:32 -> calls:32 1 byte |
| 2030 |
* call:16 -> calls:16 1 byte |
| 2031 |
* These are done anytime using "calls" would result |
| 2032 |
in smaller code, or when necessary to preserve the |
| 2033 |
meaning of the program. |
| 2034 |
|
| 2035 |
* call:32 varies |
| 2036 |
* call:16 |
| 2037 |
* In some circumstances we can move instructions |
| 2038 |
from a function prologue into a "call" instruction. |
| 2039 |
This is only done if the resulting code is no larger |
| 2040 |
than the original code. |
| 2041 |
|
| 2042 |
* jmp:32 -> jmp:16 2 bytes |
| 2043 |
* jmp:16 -> bra:8 1 byte |
| 2044 |
|
| 2045 |
* If the previous instruction is a conditional branch |
| 2046 |
around the jump/bra, we may be able to reverse its condition |
| 2047 |
and change its target to the jump's target. The jump/bra |
| 2048 |
can then be deleted. 2 bytes |
| 2049 |
|
| 2050 |
* mov abs32 -> mov abs16 1 or 2 bytes |
| 2051 |
|
| 2052 |
* Most instructions which accept imm32 can relax to imm16 1 or 2 bytes |
| 2053 |
- Most instructions which accept imm16 can relax to imm8 1 or 2 bytes |
| 2054 |
|
| 2055 |
* Most instructions which accept d32 can relax to d16 1 or 2 bytes |
| 2056 |
- Most instructions which accept d16 can relax to d8 1 or 2 bytes |
| 2057 |
|
| 2058 |
We don't handle imm16->imm8 or d16->d8 as they're very rare |
| 2059 |
and somewhat more difficult to support. */ |
| 2060 |
|
| 2061 |
static bfd_boolean |
| 2062 |
mn10300_elf_relax_section (bfd *abfd, |
| 2063 |
asection *sec, |
| 2064 |
struct bfd_link_info *link_info, |
| 2065 |
bfd_boolean *again) |
| 2066 |
{ |
| 2067 |
Elf_Internal_Shdr *symtab_hdr; |
| 2068 |
Elf_Internal_Rela *internal_relocs = NULL; |
| 2069 |
Elf_Internal_Rela *irel, *irelend; |
| 2070 |
bfd_byte *contents = NULL; |
| 2071 |
Elf_Internal_Sym *isymbuf = NULL; |
| 2072 |
struct elf32_mn10300_link_hash_table *hash_table; |
| 2073 |
asection *section = sec; |
| 2074 |
bfd_vma align_gap_adjustment; |
| 2075 |
|
| 2076 |
if (link_info->relocatable) |
| 2077 |
(*link_info->callbacks->einfo) |
| 2078 |
(_("%P%F: --relax and -r may not be used together\n")); |
| 2079 |
|
| 2080 |
/* Assume nothing changes. */ |
| 2081 |
*again = FALSE; |
| 2082 |
|
| 2083 |
/* We need a pointer to the mn10300 specific hash table. */ |
| 2084 |
hash_table = elf32_mn10300_hash_table (link_info); |
| 2085 |
|
| 2086 |
/* Initialize fields in each hash table entry the first time through. */ |
| 2087 |
if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0) |
| 2088 |
{ |
| 2089 |
bfd *input_bfd; |
| 2090 |
|
| 2091 |
/* Iterate over all the input bfds. */ |
| 2092 |
for (input_bfd = link_info->input_bfds; |
| 2093 |
input_bfd != NULL; |
| 2094 |
input_bfd = input_bfd->link_next) |
| 2095 |
{ |
| 2096 |
/* We're going to need all the symbols for each bfd. */ |
| 2097 |
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2098 |
if (symtab_hdr->sh_info != 0) |
| 2099 |
{ |
| 2100 |
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2101 |
if (isymbuf == NULL) |
| 2102 |
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 2103 |
symtab_hdr->sh_info, 0, |
| 2104 |
NULL, NULL, NULL); |
| 2105 |
if (isymbuf == NULL) |
| 2106 |
goto error_return; |
| 2107 |
} |
| 2108 |
|
| 2109 |
/* Iterate over each section in this bfd. */ |
| 2110 |
for (section = input_bfd->sections; |
| 2111 |
section != NULL; |
| 2112 |
section = section->next) |
| 2113 |
{ |
| 2114 |
struct elf32_mn10300_link_hash_entry *hash; |
| 2115 |
Elf_Internal_Sym *sym; |
| 2116 |
asection *sym_sec = NULL; |
| 2117 |
const char *sym_name; |
| 2118 |
char *new_name; |
| 2119 |
|
| 2120 |
/* If there's nothing to do in this section, skip it. */ |
| 2121 |
if (! ((section->flags & SEC_RELOC) != 0 |
| 2122 |
&& section->reloc_count != 0)) |
| 2123 |
continue; |
| 2124 |
if ((section->flags & SEC_ALLOC) == 0) |
| 2125 |
continue; |
| 2126 |
|
| 2127 |
/* Get cached copy of section contents if it exists. */ |
| 2128 |
if (elf_section_data (section)->this_hdr.contents != NULL) |
| 2129 |
contents = elf_section_data (section)->this_hdr.contents; |
| 2130 |
else if (section->size != 0) |
| 2131 |
{ |
| 2132 |
/* Go get them off disk. */ |
| 2133 |
if (!bfd_malloc_and_get_section (input_bfd, section, |
| 2134 |
&contents)) |
| 2135 |
goto error_return; |
| 2136 |
} |
| 2137 |
else |
| 2138 |
contents = NULL; |
| 2139 |
|
| 2140 |
/* If there aren't any relocs, then there's nothing to do. */ |
| 2141 |
if ((section->flags & SEC_RELOC) != 0 |
| 2142 |
&& section->reloc_count != 0) |
| 2143 |
{ |
| 2144 |
/* Get a copy of the native relocations. */ |
| 2145 |
internal_relocs = _bfd_elf_link_read_relocs (input_bfd, section, |
| 2146 |
NULL, NULL, |
| 2147 |
link_info->keep_memory); |
| 2148 |
if (internal_relocs == NULL) |
| 2149 |
goto error_return; |
| 2150 |
|
| 2151 |
/* Now examine each relocation. */ |
| 2152 |
irel = internal_relocs; |
| 2153 |
irelend = irel + section->reloc_count; |
| 2154 |
for (; irel < irelend; irel++) |
| 2155 |
{ |
| 2156 |
long r_type; |
| 2157 |
unsigned long r_index; |
| 2158 |
unsigned char code; |
| 2159 |
|
| 2160 |
r_type = ELF32_R_TYPE (irel->r_info); |
| 2161 |
r_index = ELF32_R_SYM (irel->r_info); |
| 2162 |
|
| 2163 |
if (r_type < 0 || r_type >= (int) R_MN10300_MAX) |
| 2164 |
goto error_return; |
| 2165 |
|
| 2166 |
/* We need the name and hash table entry of the target |
| 2167 |
symbol! */ |
| 2168 |
hash = NULL; |
| 2169 |
sym = NULL; |
| 2170 |
sym_sec = NULL; |
| 2171 |
|
| 2172 |
if (r_index < symtab_hdr->sh_info) |
| 2173 |
{ |
| 2174 |
/* A local symbol. */ |
| 2175 |
Elf_Internal_Sym *isym; |
| 2176 |
struct elf_link_hash_table *elftab; |
| 2177 |
bfd_size_type amt; |
| 2178 |
|
| 2179 |
isym = isymbuf + r_index; |
| 2180 |
if (isym->st_shndx == SHN_UNDEF) |
| 2181 |
sym_sec = bfd_und_section_ptr; |
| 2182 |
else if (isym->st_shndx == SHN_ABS) |
| 2183 |
sym_sec = bfd_abs_section_ptr; |
| 2184 |
else if (isym->st_shndx == SHN_COMMON) |
| 2185 |
sym_sec = bfd_com_section_ptr; |
| 2186 |
else |
| 2187 |
sym_sec |
| 2188 |
= bfd_section_from_elf_index (input_bfd, |
| 2189 |
isym->st_shndx); |
| 2190 |
|
| 2191 |
sym_name |
| 2192 |
= bfd_elf_string_from_elf_section (input_bfd, |
| 2193 |
(symtab_hdr |
| 2194 |
->sh_link), |
| 2195 |
isym->st_name); |
| 2196 |
|
| 2197 |
/* If it isn't a function, then we don't care |
| 2198 |
about it. */ |
| 2199 |
if (ELF_ST_TYPE (isym->st_info) != STT_FUNC) |
| 2200 |
continue; |
| 2201 |
|
| 2202 |
/* Tack on an ID so we can uniquely identify this |
| 2203 |
local symbol in the global hash table. */ |
| 2204 |
amt = strlen (sym_name) + 10; |
| 2205 |
new_name = bfd_malloc (amt); |
| 2206 |
if (new_name == NULL) |
| 2207 |
goto error_return; |
| 2208 |
|
| 2209 |
sprintf (new_name, "%s_%08x", sym_name, sym_sec->id); |
| 2210 |
sym_name = new_name; |
| 2211 |
|
| 2212 |
elftab = &hash_table->static_hash_table->root; |
| 2213 |
hash = ((struct elf32_mn10300_link_hash_entry *) |
| 2214 |
elf_link_hash_lookup (elftab, sym_name, |
| 2215 |
TRUE, TRUE, FALSE)); |
| 2216 |
free (new_name); |
| 2217 |
} |
| 2218 |
else |
| 2219 |
{ |
| 2220 |
r_index -= symtab_hdr->sh_info; |
| 2221 |
hash = (struct elf32_mn10300_link_hash_entry *) |
| 2222 |
elf_sym_hashes (input_bfd)[r_index]; |
| 2223 |
} |
| 2224 |
|
| 2225 |
sym_name = hash->root.root.root.string; |
| 2226 |
if ((section->flags & SEC_CODE) != 0) |
| 2227 |
{ |
| 2228 |
/* If this is not a "call" instruction, then we |
| 2229 |
should convert "call" instructions to "calls" |
| 2230 |
instructions. */ |
| 2231 |
code = bfd_get_8 (input_bfd, |
| 2232 |
contents + irel->r_offset - 1); |
| 2233 |
if (code != 0xdd && code != 0xcd) |
| 2234 |
hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; |
| 2235 |
} |
| 2236 |
|
| 2237 |
/* If this is a jump/call, then bump the |
| 2238 |
direct_calls counter. Else force "call" to |
| 2239 |
"calls" conversions. */ |
| 2240 |
if (r_type == R_MN10300_PCREL32 |
| 2241 |
|| r_type == R_MN10300_PLT32 |
| 2242 |
|| r_type == R_MN10300_PLT16 |
| 2243 |
|| r_type == R_MN10300_PCREL16) |
| 2244 |
hash->direct_calls++; |
| 2245 |
else |
| 2246 |
hash->flags |= MN10300_CONVERT_CALL_TO_CALLS; |
| 2247 |
} |
| 2248 |
} |
| 2249 |
|
| 2250 |
/* Now look at the actual contents to get the stack size, |
| 2251 |
and a list of what registers were saved in the prologue |
| 2252 |
(ie movm_args). */ |
| 2253 |
if ((section->flags & SEC_CODE) != 0) |
| 2254 |
{ |
| 2255 |
Elf_Internal_Sym *isym, *isymend; |
| 2256 |
unsigned int sec_shndx; |
| 2257 |
struct elf_link_hash_entry **hashes; |
| 2258 |
struct elf_link_hash_entry **end_hashes; |
| 2259 |
unsigned int symcount; |
| 2260 |
|
| 2261 |
sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd, |
| 2262 |
section); |
| 2263 |
|
| 2264 |
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 2265 |
- symtab_hdr->sh_info); |
| 2266 |
hashes = elf_sym_hashes (input_bfd); |
| 2267 |
end_hashes = hashes + symcount; |
| 2268 |
|
| 2269 |
/* Look at each function defined in this section and |
| 2270 |
update info for that function. */ |
| 2271 |
isymend = isymbuf + symtab_hdr->sh_info; |
| 2272 |
for (isym = isymbuf; isym < isymend; isym++) |
| 2273 |
{ |
| 2274 |
if (isym->st_shndx == sec_shndx |
| 2275 |
&& ELF_ST_TYPE (isym->st_info) == STT_FUNC) |
| 2276 |
{ |
| 2277 |
struct elf_link_hash_table *elftab; |
| 2278 |
bfd_size_type amt; |
| 2279 |
struct elf_link_hash_entry **lhashes = hashes; |
| 2280 |
|
| 2281 |
/* Skip a local symbol if it aliases a |
| 2282 |
global one. */ |
| 2283 |
for (; lhashes < end_hashes; lhashes++) |
| 2284 |
{ |
| 2285 |
hash = (struct elf32_mn10300_link_hash_entry *) *lhashes; |
| 2286 |
if ((hash->root.root.type == bfd_link_hash_defined |
| 2287 |
|| hash->root.root.type == bfd_link_hash_defweak) |
| 2288 |
&& hash->root.root.u.def.section == section |
| 2289 |
&& hash->root.type == STT_FUNC |
| 2290 |
&& hash->root.root.u.def.value == isym->st_value) |
| 2291 |
break; |
| 2292 |
} |
| 2293 |
if (lhashes != end_hashes) |
| 2294 |
continue; |
| 2295 |
|
| 2296 |
if (isym->st_shndx == SHN_UNDEF) |
| 2297 |
sym_sec = bfd_und_section_ptr; |
| 2298 |
else if (isym->st_shndx == SHN_ABS) |
| 2299 |
sym_sec = bfd_abs_section_ptr; |
| 2300 |
else if (isym->st_shndx == SHN_COMMON) |
| 2301 |
sym_sec = bfd_com_section_ptr; |
| 2302 |
else |
| 2303 |
sym_sec |
| 2304 |
= bfd_section_from_elf_index (input_bfd, |
| 2305 |
isym->st_shndx); |
| 2306 |
|
| 2307 |
sym_name = (bfd_elf_string_from_elf_section |
| 2308 |
(input_bfd, symtab_hdr->sh_link, |
| 2309 |
isym->st_name)); |
| 2310 |
|
| 2311 |
/* Tack on an ID so we can uniquely identify this |
| 2312 |
local symbol in the global hash table. */ |
| 2313 |
amt = strlen (sym_name) + 10; |
| 2314 |
new_name = bfd_malloc (amt); |
| 2315 |
if (new_name == NULL) |
| 2316 |
goto error_return; |
| 2317 |
|
| 2318 |
sprintf (new_name, "%s_%08x", sym_name, sym_sec->id); |
| 2319 |
sym_name = new_name; |
| 2320 |
|
| 2321 |
elftab = &hash_table->static_hash_table->root; |
| 2322 |
hash = ((struct elf32_mn10300_link_hash_entry *) |
| 2323 |
elf_link_hash_lookup (elftab, sym_name, |
| 2324 |
TRUE, TRUE, FALSE)); |
| 2325 |
free (new_name); |
| 2326 |
compute_function_info (input_bfd, hash, |
| 2327 |
isym->st_value, contents); |
| 2328 |
hash->value = isym->st_value; |
| 2329 |
} |
| 2330 |
} |
| 2331 |
|
| 2332 |
for (; hashes < end_hashes; hashes++) |
| 2333 |
{ |
| 2334 |
hash = (struct elf32_mn10300_link_hash_entry *) *hashes; |
| 2335 |
if ((hash->root.root.type == bfd_link_hash_defined |
| 2336 |
|| hash->root.root.type == bfd_link_hash_defweak) |
| 2337 |
&& hash->root.root.u.def.section == section |
| 2338 |
&& hash->root.type == STT_FUNC) |
| 2339 |
compute_function_info (input_bfd, hash, |
| 2340 |
(hash)->root.root.u.def.value, |
| 2341 |
contents); |
| 2342 |
} |
| 2343 |
} |
| 2344 |
|
| 2345 |
/* Cache or free any memory we allocated for the relocs. */ |
| 2346 |
if (internal_relocs != NULL |
| 2347 |
&& elf_section_data (section)->relocs != internal_relocs) |
| 2348 |
free (internal_relocs); |
| 2349 |
internal_relocs = NULL; |
| 2350 |
|
| 2351 |
/* Cache or free any memory we allocated for the contents. */ |
| 2352 |
if (contents != NULL |
| 2353 |
&& elf_section_data (section)->this_hdr.contents != contents) |
| 2354 |
{ |
| 2355 |
if (! link_info->keep_memory) |
| 2356 |
free (contents); |
| 2357 |
else |
| 2358 |
{ |
| 2359 |
/* Cache the section contents for elf_link_input_bfd. */ |
| 2360 |
elf_section_data (section)->this_hdr.contents = contents; |
| 2361 |
} |
| 2362 |
} |
| 2363 |
contents = NULL; |
| 2364 |
} |
| 2365 |
|
| 2366 |
/* Cache or free any memory we allocated for the symbols. */ |
| 2367 |
if (isymbuf != NULL |
| 2368 |
&& symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2369 |
{ |
| 2370 |
if (! link_info->keep_memory) |
| 2371 |
free (isymbuf); |
| 2372 |
else |
| 2373 |
{ |
| 2374 |
/* Cache the symbols for elf_link_input_bfd. */ |
| 2375 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2376 |
} |
| 2377 |
} |
| 2378 |
isymbuf = NULL; |
| 2379 |
} |
| 2380 |
|
| 2381 |
/* Now iterate on each symbol in the hash table and perform |
| 2382 |
the final initialization steps on each. */ |
| 2383 |
elf32_mn10300_link_hash_traverse (hash_table, |
| 2384 |
elf32_mn10300_finish_hash_table_entry, |
| 2385 |
link_info); |
| 2386 |
elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, |
| 2387 |
elf32_mn10300_finish_hash_table_entry, |
| 2388 |
link_info); |
| 2389 |
|
| 2390 |
{ |
| 2391 |
/* This section of code collects all our local symbols, sorts |
| 2392 |
them by value, and looks for multiple symbols referring to |
| 2393 |
the same address. For those symbols, the flags are merged. |
| 2394 |
At this point, the only flag that can be set is |
| 2395 |
MN10300_CONVERT_CALL_TO_CALLS, so we simply OR the flags |
| 2396 |
together. */ |
| 2397 |
int static_count = 0, i; |
| 2398 |
struct elf32_mn10300_link_hash_entry **entries; |
| 2399 |
struct elf32_mn10300_link_hash_entry **ptr; |
| 2400 |
|
| 2401 |
elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, |
| 2402 |
elf32_mn10300_count_hash_table_entries, |
| 2403 |
&static_count); |
| 2404 |
|
| 2405 |
entries = bfd_malloc (static_count * sizeof (* ptr)); |
| 2406 |
|
| 2407 |
ptr = entries; |
| 2408 |
elf32_mn10300_link_hash_traverse (hash_table->static_hash_table, |
| 2409 |
elf32_mn10300_list_hash_table_entries, |
| 2410 |
& ptr); |
| 2411 |
|
| 2412 |
qsort (entries, static_count, sizeof (entries[0]), sort_by_value); |
| 2413 |
|
| 2414 |
for (i = 0; i < static_count - 1; i++) |
| 2415 |
if (entries[i]->value && entries[i]->value == entries[i+1]->value) |
| 2416 |
{ |
| 2417 |
int v = entries[i]->flags; |
| 2418 |
int j; |
| 2419 |
|
| 2420 |
for (j = i + 1; j < static_count && entries[j]->value == entries[i]->value; j++) |
| 2421 |
v |= entries[j]->flags; |
| 2422 |
|
| 2423 |
for (j = i; j < static_count && entries[j]->value == entries[i]->value; j++) |
| 2424 |
entries[j]->flags = v; |
| 2425 |
|
| 2426 |
i = j - 1; |
| 2427 |
} |
| 2428 |
} |
| 2429 |
|
| 2430 |
/* All entries in the hash table are fully initialized. */ |
| 2431 |
hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED; |
| 2432 |
|
| 2433 |
/* Now that everything has been initialized, go through each |
| 2434 |
code section and delete any prologue insns which will be |
| 2435 |
redundant because their operations will be performed by |
| 2436 |
a "call" instruction. */ |
| 2437 |
for (input_bfd = link_info->input_bfds; |
| 2438 |
input_bfd != NULL; |
| 2439 |
input_bfd = input_bfd->link_next) |
| 2440 |
{ |
| 2441 |
/* We're going to need all the local symbols for each bfd. */ |
| 2442 |
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2443 |
if (symtab_hdr->sh_info != 0) |
| 2444 |
{ |
| 2445 |
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2446 |
if (isymbuf == NULL) |
| 2447 |
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 2448 |
symtab_hdr->sh_info, 0, |
| 2449 |
NULL, NULL, NULL); |
| 2450 |
if (isymbuf == NULL) |
| 2451 |
goto error_return; |
| 2452 |
} |
| 2453 |
|
| 2454 |
/* Walk over each section in this bfd. */ |
| 2455 |
for (section = input_bfd->sections; |
| 2456 |
section != NULL; |
| 2457 |
section = section->next) |
| 2458 |
{ |
| 2459 |
unsigned int sec_shndx; |
| 2460 |
Elf_Internal_Sym *isym, *isymend; |
| 2461 |
struct elf_link_hash_entry **hashes; |
| 2462 |
struct elf_link_hash_entry **end_hashes; |
| 2463 |
unsigned int symcount; |
| 2464 |
|
| 2465 |
/* Skip non-code sections and empty sections. */ |
| 2466 |
if ((section->flags & SEC_CODE) == 0 || section->size == 0) |
| 2467 |
continue; |
| 2468 |
|
| 2469 |
if (section->reloc_count != 0) |
| 2470 |
{ |
| 2471 |
/* Get a copy of the native relocations. */ |
| 2472 |
internal_relocs = _bfd_elf_link_read_relocs (input_bfd, section, |
| 2473 |
NULL, NULL, |
| 2474 |
link_info->keep_memory); |
| 2475 |
if (internal_relocs == NULL) |
| 2476 |
goto error_return; |
| 2477 |
} |
| 2478 |
|
| 2479 |
/* Get cached copy of section contents if it exists. */ |
| 2480 |
if (elf_section_data (section)->this_hdr.contents != NULL) |
| 2481 |
contents = elf_section_data (section)->this_hdr.contents; |
| 2482 |
else |
| 2483 |
{ |
| 2484 |
/* Go get them off disk. */ |
| 2485 |
if (!bfd_malloc_and_get_section (input_bfd, section, |
| 2486 |
&contents)) |
| 2487 |
goto error_return; |
| 2488 |
} |
| 2489 |
|
| 2490 |
sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd, |
| 2491 |
section); |
| 2492 |
|
| 2493 |
/* Now look for any function in this section which needs |
| 2494 |
insns deleted from its prologue. */ |
| 2495 |
isymend = isymbuf + symtab_hdr->sh_info; |
| 2496 |
for (isym = isymbuf; isym < isymend; isym++) |
| 2497 |
{ |
| 2498 |
struct elf32_mn10300_link_hash_entry *sym_hash; |
| 2499 |
asection *sym_sec = NULL; |
| 2500 |
const char *sym_name; |
| 2501 |
char *new_name; |
| 2502 |
struct elf_link_hash_table *elftab; |
| 2503 |
bfd_size_type amt; |
| 2504 |
|
| 2505 |
if (isym->st_shndx != sec_shndx) |
| 2506 |
continue; |
| 2507 |
|
| 2508 |
if (isym->st_shndx == SHN_UNDEF) |
| 2509 |
sym_sec = bfd_und_section_ptr; |
| 2510 |
else if (isym->st_shndx == SHN_ABS) |
| 2511 |
sym_sec = bfd_abs_section_ptr; |
| 2512 |
else if (isym->st_shndx == SHN_COMMON) |
| 2513 |
sym_sec = bfd_com_section_ptr; |
| 2514 |
else |
| 2515 |
sym_sec |
| 2516 |
= bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
| 2517 |
|
| 2518 |
sym_name |
| 2519 |
= bfd_elf_string_from_elf_section (input_bfd, |
| 2520 |
symtab_hdr->sh_link, |
| 2521 |
isym->st_name); |
| 2522 |
|
| 2523 |
/* Tack on an ID so we can uniquely identify this |
| 2524 |
local symbol in the global hash table. */ |
| 2525 |
amt = strlen (sym_name) + 10; |
| 2526 |
new_name = bfd_malloc (amt); |
| 2527 |
if (new_name == NULL) |
| 2528 |
goto error_return; |
| 2529 |
sprintf (new_name, "%s_%08x", sym_name, sym_sec->id); |
| 2530 |
sym_name = new_name; |
| 2531 |
|
| 2532 |
elftab = & hash_table->static_hash_table->root; |
| 2533 |
sym_hash = (struct elf32_mn10300_link_hash_entry *) |
| 2534 |
elf_link_hash_lookup (elftab, sym_name, |
| 2535 |
FALSE, FALSE, FALSE); |
| 2536 |
|
| 2537 |
free (new_name); |
| 2538 |
if (sym_hash == NULL) |
| 2539 |
continue; |
| 2540 |
|
| 2541 |
if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS) |
| 2542 |
&& ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES)) |
| 2543 |
{ |
| 2544 |
int bytes = 0; |
| 2545 |
|
| 2546 |
/* Note that we've changed things. */ |
| 2547 |
elf_section_data (section)->relocs = internal_relocs; |
| 2548 |
elf_section_data (section)->this_hdr.contents = contents; |
| 2549 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2550 |
|
| 2551 |
/* Count how many bytes we're going to delete. */ |
| 2552 |
if (sym_hash->movm_args) |
| 2553 |
bytes += 2; |
| 2554 |
|
| 2555 |
if (sym_hash->stack_size > 0) |
| 2556 |
{ |
| 2557 |
if (sym_hash->stack_size <= 128) |
| 2558 |
bytes += 3; |
| 2559 |
else |
| 2560 |
bytes += 4; |
| 2561 |
} |
| 2562 |
|
| 2563 |
/* Note that we've deleted prologue bytes for this |
| 2564 |
function. */ |
| 2565 |
sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; |
| 2566 |
|
| 2567 |
/* Actually delete the bytes. */ |
| 2568 |
if (!mn10300_elf_relax_delete_bytes (input_bfd, |
| 2569 |
section, |
| 2570 |
isym->st_value, |
| 2571 |
bytes)) |
| 2572 |
goto error_return; |
| 2573 |
|
| 2574 |
/* Something changed. Not strictly necessary, but |
| 2575 |
may lead to more relaxing opportunities. */ |
| 2576 |
*again = TRUE; |
| 2577 |
} |
| 2578 |
} |
| 2579 |
|
| 2580 |
/* Look for any global functions in this section which |
| 2581 |
need insns deleted from their prologues. */ |
| 2582 |
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 2583 |
- symtab_hdr->sh_info); |
| 2584 |
hashes = elf_sym_hashes (input_bfd); |
| 2585 |
end_hashes = hashes + symcount; |
| 2586 |
for (; hashes < end_hashes; hashes++) |
| 2587 |
{ |
| 2588 |
struct elf32_mn10300_link_hash_entry *sym_hash; |
| 2589 |
|
| 2590 |
sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes; |
| 2591 |
if ((sym_hash->root.root.type == bfd_link_hash_defined |
| 2592 |
|| sym_hash->root.root.type == bfd_link_hash_defweak) |
| 2593 |
&& sym_hash->root.root.u.def.section == section |
| 2594 |
&& ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS) |
| 2595 |
&& ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES)) |
| 2596 |
{ |
| 2597 |
int bytes = 0; |
| 2598 |
bfd_vma symval; |
| 2599 |
|
| 2600 |
/* Note that we've changed things. */ |
| 2601 |
elf_section_data (section)->relocs = internal_relocs; |
| 2602 |
elf_section_data (section)->this_hdr.contents = contents; |
| 2603 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2604 |
|
| 2605 |
/* Count how many bytes we're going to delete. */ |
| 2606 |
if (sym_hash->movm_args) |
| 2607 |
bytes += 2; |
| 2608 |
|
| 2609 |
if (sym_hash->stack_size > 0) |
| 2610 |
{ |
| 2611 |
if (sym_hash->stack_size <= 128) |
| 2612 |
bytes += 3; |
| 2613 |
else |
| 2614 |
bytes += 4; |
| 2615 |
} |
| 2616 |
|
| 2617 |
/* Note that we've deleted prologue bytes for this |
| 2618 |
function. */ |
| 2619 |
sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES; |
| 2620 |
|
| 2621 |
/* Actually delete the bytes. */ |
| 2622 |
symval = sym_hash->root.root.u.def.value; |
| 2623 |
if (!mn10300_elf_relax_delete_bytes (input_bfd, |
| 2624 |
section, |
| 2625 |
symval, |
| 2626 |
bytes)) |
| 2627 |
goto error_return; |
| 2628 |
|
| 2629 |
/* Something changed. Not strictly necessary, but |
| 2630 |
may lead to more relaxing opportunities. */ |
| 2631 |
*again = TRUE; |
| 2632 |
} |
| 2633 |
} |
| 2634 |
|
| 2635 |
/* Cache or free any memory we allocated for the relocs. */ |
| 2636 |
if (internal_relocs != NULL |
| 2637 |
&& elf_section_data (section)->relocs != internal_relocs) |
| 2638 |
free (internal_relocs); |
| 2639 |
internal_relocs = NULL; |
| 2640 |
|
| 2641 |
/* Cache or free any memory we allocated for the contents. */ |
| 2642 |
if (contents != NULL |
| 2643 |
&& elf_section_data (section)->this_hdr.contents != contents) |
| 2644 |
{ |
| 2645 |
if (! link_info->keep_memory) |
| 2646 |
free (contents); |
| 2647 |
else |
| 2648 |
/* Cache the section contents for elf_link_input_bfd. */ |
| 2649 |
elf_section_data (section)->this_hdr.contents = contents; |
| 2650 |
} |
| 2651 |
contents = NULL; |
| 2652 |
} |
| 2653 |
|
| 2654 |
/* Cache or free any memory we allocated for the symbols. */ |
| 2655 |
if (isymbuf != NULL |
| 2656 |
&& symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2657 |
{ |
| 2658 |
if (! link_info->keep_memory) |
| 2659 |
free (isymbuf); |
| 2660 |
else |
| 2661 |
/* Cache the symbols for elf_link_input_bfd. */ |
| 2662 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2663 |
} |
| 2664 |
isymbuf = NULL; |
| 2665 |
} |
| 2666 |
} |
| 2667 |
|
| 2668 |
/* (Re)initialize for the basic instruction shortening/relaxing pass. */ |
| 2669 |
contents = NULL; |
| 2670 |
internal_relocs = NULL; |
| 2671 |
isymbuf = NULL; |
| 2672 |
/* For error_return. */ |
| 2673 |
section = sec; |
| 2674 |
|
| 2675 |
/* We don't have to do anything for a relocatable link, if |
| 2676 |
this section does not have relocs, or if this is not a |
| 2677 |
code section. */ |
| 2678 |
if (link_info->relocatable |
| 2679 |
|| (sec->flags & SEC_RELOC) == 0 |
| 2680 |
|| sec->reloc_count == 0 |
| 2681 |
|| (sec->flags & SEC_CODE) == 0) |
| 2682 |
return TRUE; |
| 2683 |
|
| 2684 |
symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2685 |
|
| 2686 |
/* Get a copy of the native relocations. */ |
| 2687 |
internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
| 2688 |
link_info->keep_memory); |
| 2689 |
if (internal_relocs == NULL) |
| 2690 |
goto error_return; |
| 2691 |
|
| 2692 |
/* Scan for worst case alignment gap changes. Note that this logic |
| 2693 |
is not ideal; what we should do is run this scan for every |
| 2694 |
opcode/address range and adjust accordingly, but that's |
| 2695 |
expensive. Worst case is that for an alignment of N bytes, we |
| 2696 |
move by 2*N-N-1 bytes, assuming we have aligns of 1, 2, 4, 8, etc |
| 2697 |
all before it. Plus, this still doesn't cover cross-section |
| 2698 |
jumps with section alignment. */ |
| 2699 |
irelend = internal_relocs + sec->reloc_count; |
| 2700 |
align_gap_adjustment = 0; |
| 2701 |
for (irel = internal_relocs; irel < irelend; irel++) |
| 2702 |
{ |
| 2703 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN) |
| 2704 |
{ |
| 2705 |
bfd_vma adj = 1 << irel->r_addend; |
| 2706 |
bfd_vma aend = irel->r_offset; |
| 2707 |
|
| 2708 |
aend = BFD_ALIGN (aend, 1 << irel->r_addend); |
| 2709 |
adj = 2 * adj - adj - 1; |
| 2710 |
|
| 2711 |
/* Record the biggest adjustmnet. Skip any alignment at the |
| 2712 |
end of our section. */ |
| 2713 |
if (align_gap_adjustment < adj |
| 2714 |
&& aend < sec->output_section->vma + sec->output_offset + sec->size) |
| 2715 |
align_gap_adjustment = adj; |
| 2716 |
} |
| 2717 |
} |
| 2718 |
|
| 2719 |
/* Walk through them looking for relaxing opportunities. */ |
| 2720 |
irelend = internal_relocs + sec->reloc_count; |
| 2721 |
for (irel = internal_relocs; irel < irelend; irel++) |
| 2722 |
{ |
| 2723 |
bfd_vma symval; |
| 2724 |
bfd_signed_vma jump_offset; |
| 2725 |
asection *sym_sec = NULL; |
| 2726 |
struct elf32_mn10300_link_hash_entry *h = NULL; |
| 2727 |
|
| 2728 |
/* If this isn't something that can be relaxed, then ignore |
| 2729 |
this reloc. */ |
| 2730 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE |
| 2731 |
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8 |
| 2732 |
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX) |
| 2733 |
continue; |
| 2734 |
|
| 2735 |
/* Get the section contents if we haven't done so already. */ |
| 2736 |
if (contents == NULL) |
| 2737 |
{ |
| 2738 |
/* Get cached copy if it exists. */ |
| 2739 |
if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 2740 |
contents = elf_section_data (sec)->this_hdr.contents; |
| 2741 |
else |
| 2742 |
{ |
| 2743 |
/* Go get them off disk. */ |
| 2744 |
if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 2745 |
goto error_return; |
| 2746 |
} |
| 2747 |
} |
| 2748 |
|
| 2749 |
/* Read this BFD's symbols if we haven't done so already. */ |
| 2750 |
if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 2751 |
{ |
| 2752 |
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2753 |
if (isymbuf == NULL) |
| 2754 |
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 2755 |
symtab_hdr->sh_info, 0, |
| 2756 |
NULL, NULL, NULL); |
| 2757 |
if (isymbuf == NULL) |
| 2758 |
goto error_return; |
| 2759 |
} |
| 2760 |
|
| 2761 |
/* Get the value of the symbol referred to by the reloc. */ |
| 2762 |
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 2763 |
{ |
| 2764 |
Elf_Internal_Sym *isym; |
| 2765 |
const char *sym_name; |
| 2766 |
char *new_name; |
| 2767 |
|
| 2768 |
/* A local symbol. */ |
| 2769 |
isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 2770 |
if (isym->st_shndx == SHN_UNDEF) |
| 2771 |
sym_sec = bfd_und_section_ptr; |
| 2772 |
else if (isym->st_shndx == SHN_ABS) |
| 2773 |
sym_sec = bfd_abs_section_ptr; |
| 2774 |
else if (isym->st_shndx == SHN_COMMON) |
| 2775 |
sym_sec = bfd_com_section_ptr; |
| 2776 |
else |
| 2777 |
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2778 |
|
| 2779 |
sym_name = bfd_elf_string_from_elf_section (abfd, |
| 2780 |
symtab_hdr->sh_link, |
| 2781 |
isym->st_name); |
| 2782 |
|
| 2783 |
if ((sym_sec->flags & SEC_MERGE) |
| 2784 |
&& sym_sec->sec_info_type == ELF_INFO_TYPE_MERGE) |
| 2785 |
{ |
| 2786 |
symval = isym->st_value; |
| 2787 |
|
| 2788 |
/* GAS may reduce relocations against symbols in SEC_MERGE |
| 2789 |
sections to a relocation against the section symbol when |
| 2790 |
the original addend was zero. When the reloc is against |
| 2791 |
a section symbol we should include the addend in the |
| 2792 |
offset passed to _bfd_merged_section_offset, since the |
| 2793 |
location of interest is the original symbol. On the |
| 2794 |
other hand, an access to "sym+addend" where "sym" is not |
| 2795 |
a section symbol should not include the addend; Such an |
| 2796 |
access is presumed to be an offset from "sym"; The |
| 2797 |
location of interest is just "sym". */ |
| 2798 |
if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
| 2799 |
symval += irel->r_addend; |
| 2800 |
|
| 2801 |
symval = _bfd_merged_section_offset (abfd, & sym_sec, |
| 2802 |
elf_section_data (sym_sec)->sec_info, |
| 2803 |
symval); |
| 2804 |
|
| 2805 |
if (ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
| 2806 |
symval += irel->r_addend; |
| 2807 |
|
| 2808 |
symval += sym_sec->output_section->vma |
| 2809 |
+ sym_sec->output_offset - irel->r_addend; |
| 2810 |
} |
| 2811 |
else |
| 2812 |
symval = (isym->st_value |
| 2813 |
+ sym_sec->output_section->vma |
| 2814 |
+ sym_sec->output_offset); |
| 2815 |
|
| 2816 |
/* Tack on an ID so we can uniquely identify this |
| 2817 |
local symbol in the global hash table. */ |
| 2818 |
new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10); |
| 2819 |
if (new_name == NULL) |
| 2820 |
goto error_return; |
| 2821 |
sprintf (new_name, "%s_%08x", sym_name, sym_sec->id); |
| 2822 |
sym_name = new_name; |
| 2823 |
|
| 2824 |
h = (struct elf32_mn10300_link_hash_entry *) |
| 2825 |
elf_link_hash_lookup (&hash_table->static_hash_table->root, |
| 2826 |
sym_name, FALSE, FALSE, FALSE); |
| 2827 |
free (new_name); |
| 2828 |
} |
| 2829 |
else |
| 2830 |
{ |
| 2831 |
unsigned long indx; |
| 2832 |
|
| 2833 |
/* An external symbol. */ |
| 2834 |
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 2835 |
h = (struct elf32_mn10300_link_hash_entry *) |
| 2836 |
(elf_sym_hashes (abfd)[indx]); |
| 2837 |
BFD_ASSERT (h != NULL); |
| 2838 |
if (h->root.root.type != bfd_link_hash_defined |
| 2839 |
&& h->root.root.type != bfd_link_hash_defweak) |
| 2840 |
/* This appears to be a reference to an undefined |
| 2841 |
symbol. Just ignore it--it will be caught by the |
| 2842 |
regular reloc processing. */ |
| 2843 |
continue; |
| 2844 |
|
| 2845 |
/* Check for a reference to a discarded symbol and ignore it. */ |
| 2846 |
if (h->root.root.u.def.section->output_section == NULL) |
| 2847 |
continue; |
| 2848 |
|
| 2849 |
sym_sec = h->root.root.u.def.section->output_section; |
| 2850 |
|
| 2851 |
symval = (h->root.root.u.def.value |
| 2852 |
+ h->root.root.u.def.section->output_section->vma |
| 2853 |
+ h->root.root.u.def.section->output_offset); |
| 2854 |
} |
| 2855 |
|
| 2856 |
/* For simplicity of coding, we are going to modify the section |
| 2857 |
contents, the section relocs, and the BFD symbol table. We |
| 2858 |
must tell the rest of the code not to free up this |
| 2859 |
information. It would be possible to instead create a table |
| 2860 |
of changes which have to be made, as is done in coff-mips.c; |
| 2861 |
that would be more work, but would require less memory when |
| 2862 |
the linker is run. */ |
| 2863 |
|
| 2864 |
/* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative |
| 2865 |
branch/call, also deal with "call" -> "calls" conversions and |
| 2866 |
insertion of prologue data into "call" instructions. */ |
| 2867 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32 |
| 2868 |
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32) |
| 2869 |
{ |
| 2870 |
bfd_vma value = symval; |
| 2871 |
|
| 2872 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32 |
| 2873 |
&& h != NULL |
| 2874 |
&& ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL |
| 2875 |
&& ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN |
| 2876 |
&& h->root.plt.offset != (bfd_vma) -1) |
| 2877 |
{ |
| 2878 |
asection * splt; |
| 2879 |
|
| 2880 |
splt = bfd_get_section_by_name (elf_hash_table (link_info) |
| 2881 |
->dynobj, ".plt"); |
| 2882 |
|
| 2883 |
value = ((splt->output_section->vma |
| 2884 |
+ splt->output_offset |
| 2885 |
+ h->root.plt.offset) |
| 2886 |
- (sec->output_section->vma |
| 2887 |
+ sec->output_offset |
| 2888 |
+ irel->r_offset)); |
| 2889 |
} |
| 2890 |
|
| 2891 |
/* If we've got a "call" instruction that needs to be turned |
| 2892 |
into a "calls" instruction, do so now. It saves a byte. */ |
| 2893 |
if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) |
| 2894 |
{ |
| 2895 |
unsigned char code; |
| 2896 |
|
| 2897 |
/* Get the opcode. */ |
| 2898 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2899 |
|
| 2900 |
/* Make sure we're working with a "call" instruction! */ |
| 2901 |
if (code == 0xdd) |
| 2902 |
{ |
| 2903 |
/* Note that we've changed the relocs, section contents, |
| 2904 |
etc. */ |
| 2905 |
elf_section_data (sec)->relocs = internal_relocs; |
| 2906 |
elf_section_data (sec)->this_hdr.contents = contents; |
| 2907 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2908 |
|
| 2909 |
/* Fix the opcode. */ |
| 2910 |
bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1); |
| 2911 |
bfd_put_8 (abfd, 0xff, contents + irel->r_offset); |
| 2912 |
|
| 2913 |
/* Fix irel->r_offset and irel->r_addend. */ |
| 2914 |
irel->r_offset += 1; |
| 2915 |
irel->r_addend += 1; |
| 2916 |
|
| 2917 |
/* Delete one byte of data. */ |
| 2918 |
if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 2919 |
irel->r_offset + 3, 1)) |
| 2920 |
goto error_return; |
| 2921 |
|
| 2922 |
/* That will change things, so, we should relax again. |
| 2923 |
Note that this is not required, and it may be slow. */ |
| 2924 |
*again = TRUE; |
| 2925 |
} |
| 2926 |
} |
| 2927 |
else if (h) |
| 2928 |
{ |
| 2929 |
/* We've got a "call" instruction which needs some data |
| 2930 |
from target function filled in. */ |
| 2931 |
unsigned char code; |
| 2932 |
|
| 2933 |
/* Get the opcode. */ |
| 2934 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2935 |
|
| 2936 |
/* Insert data from the target function into the "call" |
| 2937 |
instruction if needed. */ |
| 2938 |
if (code == 0xdd) |
| 2939 |
{ |
| 2940 |
bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4); |
| 2941 |
bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, |
| 2942 |
contents + irel->r_offset + 5); |
| 2943 |
} |
| 2944 |
} |
| 2945 |
|
| 2946 |
/* Deal with pc-relative gunk. */ |
| 2947 |
value -= (sec->output_section->vma + sec->output_offset); |
| 2948 |
value -= irel->r_offset; |
| 2949 |
value += irel->r_addend; |
| 2950 |
|
| 2951 |
/* See if the value will fit in 16 bits, note the high value is |
| 2952 |
0x7fff + 2 as the target will be two bytes closer if we are |
| 2953 |
able to relax, if it's in the same section. */ |
| 2954 |
if (sec->output_section == sym_sec->output_section) |
| 2955 |
jump_offset = 0x8001; |
| 2956 |
else |
| 2957 |
jump_offset = 0x7fff; |
| 2958 |
|
| 2959 |
/* Account for jumps across alignment boundaries using |
| 2960 |
align_gap_adjustment. */ |
| 2961 |
if ((bfd_signed_vma) value < jump_offset - (bfd_signed_vma) align_gap_adjustment |
| 2962 |
&& ((bfd_signed_vma) value > -0x8000 + (bfd_signed_vma) align_gap_adjustment)) |
| 2963 |
{ |
| 2964 |
unsigned char code; |
| 2965 |
|
| 2966 |
/* Get the opcode. */ |
| 2967 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 2968 |
|
| 2969 |
if (code != 0xdc && code != 0xdd && code != 0xff) |
| 2970 |
continue; |
| 2971 |
|
| 2972 |
/* Note that we've changed the relocs, section contents, etc. */ |
| 2973 |
elf_section_data (sec)->relocs = internal_relocs; |
| 2974 |
elf_section_data (sec)->this_hdr.contents = contents; |
| 2975 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2976 |
|
| 2977 |
/* Fix the opcode. */ |
| 2978 |
if (code == 0xdc) |
| 2979 |
bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1); |
| 2980 |
else if (code == 0xdd) |
| 2981 |
bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1); |
| 2982 |
else if (code == 0xff) |
| 2983 |
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2); |
| 2984 |
|
| 2985 |
/* Fix the relocation's type. */ |
| 2986 |
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2987 |
(ELF32_R_TYPE (irel->r_info) |
| 2988 |
== (int) R_MN10300_PLT32) |
| 2989 |
? R_MN10300_PLT16 : |
| 2990 |
R_MN10300_PCREL16); |
| 2991 |
|
| 2992 |
/* Delete two bytes of data. */ |
| 2993 |
if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 2994 |
irel->r_offset + 1, 2)) |
| 2995 |
goto error_return; |
| 2996 |
|
| 2997 |
/* That will change things, so, we should relax again. |
| 2998 |
Note that this is not required, and it may be slow. */ |
| 2999 |
*again = TRUE; |
| 3000 |
} |
| 3001 |
} |
| 3002 |
|
| 3003 |
/* Try to turn a 16bit pc-relative branch into a 8bit pc-relative |
| 3004 |
branch. */ |
| 3005 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16) |
| 3006 |
{ |
| 3007 |
bfd_vma value = symval; |
| 3008 |
|
| 3009 |
/* If we've got a "call" instruction that needs to be turned |
| 3010 |
into a "calls" instruction, do so now. It saves a byte. */ |
| 3011 |
if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS)) |
| 3012 |
{ |
| 3013 |
unsigned char code; |
| 3014 |
|
| 3015 |
/* Get the opcode. */ |
| 3016 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 3017 |
|
| 3018 |
/* Make sure we're working with a "call" instruction! */ |
| 3019 |
if (code == 0xcd) |
| 3020 |
{ |
| 3021 |
/* Note that we've changed the relocs, section contents, |
| 3022 |
etc. */ |
| 3023 |
elf_section_data (sec)->relocs = internal_relocs; |
| 3024 |
elf_section_data (sec)->this_hdr.contents = contents; |
| 3025 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3026 |
|
| 3027 |
/* Fix the opcode. */ |
| 3028 |
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1); |
| 3029 |
bfd_put_8 (abfd, 0xff, contents + irel->r_offset); |
| 3030 |
|
| 3031 |
/* Fix irel->r_offset and irel->r_addend. */ |
| 3032 |
irel->r_offset += 1; |
| 3033 |
irel->r_addend += 1; |
| 3034 |
|
| 3035 |
/* Delete one byte of data. */ |
| 3036 |
if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3037 |
irel->r_offset + 1, 1)) |
| 3038 |
goto error_return; |
| 3039 |
|
| 3040 |
/* That will change things, so, we should relax again. |
| 3041 |
Note that this is not required, and it may be slow. */ |
| 3042 |
*again = TRUE; |
| 3043 |
} |
| 3044 |
} |
| 3045 |
else if (h) |
| 3046 |
{ |
| 3047 |
unsigned char code; |
| 3048 |
|
| 3049 |
/* Get the opcode. */ |
| 3050 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 3051 |
|
| 3052 |
/* Insert data from the target function into the "call" |
| 3053 |
instruction if needed. */ |
| 3054 |
if (code == 0xcd) |
| 3055 |
{ |
| 3056 |
bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2); |
| 3057 |
bfd_put_8 (abfd, h->stack_size + h->movm_stack_size, |
| 3058 |
contents + irel->r_offset + 3); |
| 3059 |
} |
| 3060 |
} |
| 3061 |
|
| 3062 |
/* Deal with pc-relative gunk. */ |
| 3063 |
value -= (sec->output_section->vma + sec->output_offset); |
| 3064 |
value -= irel->r_offset; |
| 3065 |
value += irel->r_addend; |
| 3066 |
|
| 3067 |
/* See if the value will fit in 8 bits, note the high value is |
| 3068 |
0x7f + 1 as the target will be one bytes closer if we are |
| 3069 |
able to relax. */ |
| 3070 |
if ((long) value < 0x80 && (long) value > -0x80) |
| 3071 |
{ |
| 3072 |
unsigned char code; |
| 3073 |
|
| 3074 |
/* Get the opcode. */ |
| 3075 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 3076 |
|
| 3077 |
if (code != 0xcc) |
| 3078 |
continue; |
| 3079 |
|
| 3080 |
/* Note that we've changed the relocs, section contents, etc. */ |
| 3081 |
elf_section_data (sec)->relocs = internal_relocs; |
| 3082 |
elf_section_data (sec)->this_hdr.contents = contents; |
| 3083 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3084 |
|
| 3085 |
/* Fix the opcode. */ |
| 3086 |
bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1); |
| 3087 |
|
| 3088 |
/* Fix the relocation's type. */ |
| 3089 |
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3090 |
R_MN10300_PCREL8); |
| 3091 |
|
| 3092 |
/* Delete one byte of data. */ |
| 3093 |
if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3094 |
irel->r_offset + 1, 1)) |
| 3095 |
goto error_return; |
| 3096 |
|
| 3097 |
/* That will change things, so, we should relax again. |
| 3098 |
Note that this is not required, and it may be slow. */ |
| 3099 |
*again = TRUE; |
| 3100 |
} |
| 3101 |
} |
| 3102 |
|
| 3103 |
/* Try to eliminate an unconditional 8 bit pc-relative branch |
| 3104 |
which immediately follows a conditional 8 bit pc-relative |
| 3105 |
branch around the unconditional branch. |
| 3106 |
|
| 3107 |
original: new: |
| 3108 |
bCC lab1 bCC' lab2 |
| 3109 |
bra lab2 |
| 3110 |
lab1: lab1: |
| 3111 |
|
| 3112 |
This happens when the bCC can't reach lab2 at assembly time, |
| 3113 |
but due to other relaxations it can reach at link time. */ |
| 3114 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8) |
| 3115 |
{ |
| 3116 |
Elf_Internal_Rela *nrel; |
| 3117 |
bfd_vma value = symval; |
| 3118 |
unsigned char code; |
| 3119 |
|
| 3120 |
/* Deal with pc-relative gunk. */ |
| 3121 |
value -= (sec->output_section->vma + sec->output_offset); |
| 3122 |
value -= irel->r_offset; |
| 3123 |
value += irel->r_addend; |
| 3124 |
|
| 3125 |
/* Do nothing if this reloc is the last byte in the section. */ |
| 3126 |
if (irel->r_offset == sec->size) |
| 3127 |
continue; |
| 3128 |
|
| 3129 |
/* See if the next instruction is an unconditional pc-relative |
| 3130 |
branch, more often than not this test will fail, so we |
| 3131 |
test it first to speed things up. */ |
| 3132 |
code = bfd_get_8 (abfd, contents + irel->r_offset + 1); |
| 3133 |
if (code != 0xca) |
| 3134 |
continue; |
| 3135 |
|
| 3136 |
/* Also make sure the next relocation applies to the next |
| 3137 |
instruction and that it's a pc-relative 8 bit branch. */ |
| 3138 |
nrel = irel + 1; |
| 3139 |
if (nrel == irelend |
| 3140 |
|| irel->r_offset + 2 != nrel->r_offset |
| 3141 |
|| ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8) |
| 3142 |
continue; |
| 3143 |
|
| 3144 |
/* Make sure our destination immediately follows the |
| 3145 |
unconditional branch. */ |
| 3146 |
if (symval != (sec->output_section->vma + sec->output_offset |
| 3147 |
+ irel->r_offset + 3)) |
| 3148 |
continue; |
| 3149 |
|
| 3150 |
/* Now make sure we are a conditional branch. This may not |
| 3151 |
be necessary, but why take the chance. |
| 3152 |
|
| 3153 |
Note these checks assume that R_MN10300_PCREL8 relocs |
| 3154 |
only occur on bCC and bCCx insns. If they occured |
| 3155 |
elsewhere, we'd need to know the start of this insn |
| 3156 |
for this check to be accurate. */ |
| 3157 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 3158 |
if (code != 0xc0 && code != 0xc1 && code != 0xc2 |
| 3159 |
&& code != 0xc3 && code != 0xc4 && code != 0xc5 |
| 3160 |
&& code != 0xc6 && code != 0xc7 && code != 0xc8 |
| 3161 |
&& code != 0xc9 && code != 0xe8 && code != 0xe9 |
| 3162 |
&& code != 0xea && code != 0xeb) |
| 3163 |
continue; |
| 3164 |
|
| 3165 |
/* We also have to be sure there is no symbol/label |
| 3166 |
at the unconditional branch. */ |
| 3167 |
if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf, |
| 3168 |
irel->r_offset + 1)) |
| 3169 |
continue; |
| 3170 |
|
| 3171 |
/* Note that we've changed the relocs, section contents, etc. */ |
| 3172 |
elf_section_data (sec)->relocs = internal_relocs; |
| 3173 |
elf_section_data (sec)->this_hdr.contents = contents; |
| 3174 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3175 |
|
| 3176 |
/* Reverse the condition of the first branch. */ |
| 3177 |
switch (code) |
| 3178 |
{ |
| 3179 |
case 0xc8: |
| 3180 |
code = 0xc9; |
| 3181 |
break; |
| 3182 |
case 0xc9: |
| 3183 |
code = 0xc8; |
| 3184 |
break; |
| 3185 |
case 0xc0: |
| 3186 |
code = 0xc2; |
| 3187 |
break; |
| 3188 |
case 0xc2: |
| 3189 |
code = 0xc0; |
| 3190 |
break; |
| 3191 |
case 0xc3: |
| 3192 |
code = 0xc1; |
| 3193 |
break; |
| 3194 |
case 0xc1: |
| 3195 |
code = 0xc3; |
| 3196 |
break; |
| 3197 |
case 0xc4: |
| 3198 |
code = 0xc6; |
| 3199 |
break; |
| 3200 |
case 0xc6: |
| 3201 |
code = 0xc4; |
| 3202 |
break; |
| 3203 |
case 0xc7: |
| 3204 |
code = 0xc5; |
| 3205 |
break; |
| 3206 |
case 0xc5: |
| 3207 |
code = 0xc7; |
| 3208 |
break; |
| 3209 |
case 0xe8: |
| 3210 |
code = 0xe9; |
| 3211 |
break; |
| 3212 |
case 0x9d: |
| 3213 |
code = 0xe8; |
| 3214 |
break; |
| 3215 |
case 0xea: |
| 3216 |
code = 0xeb; |
| 3217 |
break; |
| 3218 |
case 0xeb: |
| 3219 |
code = 0xea; |
| 3220 |
break; |
| 3221 |
} |
| 3222 |
bfd_put_8 (abfd, code, contents + irel->r_offset - 1); |
| 3223 |
|
| 3224 |
/* Set the reloc type and symbol for the first branch |
| 3225 |
from the second branch. */ |
| 3226 |
irel->r_info = nrel->r_info; |
| 3227 |
|
| 3228 |
/* Make the reloc for the second branch a null reloc. */ |
| 3229 |
nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), |
| 3230 |
R_MN10300_NONE); |
| 3231 |
|
| 3232 |
/* Delete two bytes of data. */ |
| 3233 |
if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3234 |
irel->r_offset + 1, 2)) |
| 3235 |
goto error_return; |
| 3236 |
|
| 3237 |
/* That will change things, so, we should relax again. |
| 3238 |
Note that this is not required, and it may be slow. */ |
| 3239 |
*again = TRUE; |
| 3240 |
} |
| 3241 |
|
| 3242 |
/* Try to turn a 24 immediate, displacement or absolute address |
| 3243 |
into a 8 immediate, displacement or absolute address. */ |
| 3244 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24) |
| 3245 |
{ |
| 3246 |
bfd_vma value = symval; |
| 3247 |
value += irel->r_addend; |
| 3248 |
|
| 3249 |
/* See if the value will fit in 8 bits. */ |
| 3250 |
if ((long) value < 0x7f && (long) value > -0x80) |
| 3251 |
{ |
| 3252 |
unsigned char code; |
| 3253 |
|
| 3254 |
/* AM33 insns which have 24 operands are 6 bytes long and |
| 3255 |
will have 0xfd as the first byte. */ |
| 3256 |
|
| 3257 |
/* Get the first opcode. */ |
| 3258 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 3); |
| 3259 |
|
| 3260 |
if (code == 0xfd) |
| 3261 |
{ |
| 3262 |
/* Get the second opcode. */ |
| 3263 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 3264 |
|
| 3265 |
/* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit |
| 3266 |
equivalent instructions exists. */ |
| 3267 |
if (code != 0x6b && code != 0x7b |
| 3268 |
&& code != 0x8b && code != 0x9b |
| 3269 |
&& ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 |
| 3270 |
|| (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b |
| 3271 |
|| (code & 0x0f) == 0x0e)) |
| 3272 |
{ |
| 3273 |
/* Not safe if the high bit is on as relaxing may |
| 3274 |
move the value out of high mem and thus not fit |
| 3275 |
in a signed 8bit value. This is currently over |
| 3276 |
conservative. */ |
| 3277 |
if ((value & 0x80) == 0) |
| 3278 |
{ |
| 3279 |
/* Note that we've changed the relocation contents, |
| 3280 |
etc. */ |
| 3281 |
elf_section_data (sec)->relocs = internal_relocs; |
| 3282 |
elf_section_data (sec)->this_hdr.contents = contents; |
| 3283 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3284 |
|
| 3285 |
/* Fix the opcode. */ |
| 3286 |
bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3); |
| 3287 |
bfd_put_8 (abfd, code, contents + irel->r_offset - 2); |
| 3288 |
|
| 3289 |
/* Fix the relocation's type. */ |
| 3290 |
irel->r_info = |
| 3291 |
ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3292 |
R_MN10300_8); |
| 3293 |
|
| 3294 |
/* Delete two bytes of data. */ |
| 3295 |
if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3296 |
irel->r_offset + 1, 2)) |
| 3297 |
goto error_return; |
| 3298 |
|
| 3299 |
/* That will change things, so, we should relax |
| 3300 |
again. Note that this is not required, and it |
| 3301 |
may be slow. */ |
| 3302 |
*again = TRUE; |
| 3303 |
break; |
| 3304 |
} |
| 3305 |
} |
| 3306 |
} |
| 3307 |
} |
| 3308 |
} |
| 3309 |
|
| 3310 |
/* Try to turn a 32bit immediate, displacement or absolute address |
| 3311 |
into a 16bit immediate, displacement or absolute address. */ |
| 3312 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32 |
| 3313 |
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32 |
| 3314 |
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32) |
| 3315 |
{ |
| 3316 |
bfd_vma value = symval; |
| 3317 |
|
| 3318 |
if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32) |
| 3319 |
{ |
| 3320 |
asection * sgot; |
| 3321 |
|
| 3322 |
sgot = bfd_get_section_by_name (elf_hash_table (link_info) |
| 3323 |
->dynobj, ".got"); |
| 3324 |
|
| 3325 |
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32) |
| 3326 |
{ |
| 3327 |
value = sgot->output_offset; |
| 3328 |
|
| 3329 |
if (h) |
| 3330 |
value += h->root.got.offset; |
| 3331 |
else |
| 3332 |
value += (elf_local_got_offsets |
| 3333 |
(abfd)[ELF32_R_SYM (irel->r_info)]); |
| 3334 |
} |
| 3335 |
else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32) |
| 3336 |
value -= sgot->output_section->vma; |
| 3337 |
else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32) |
| 3338 |
value = (sgot->output_section->vma |
| 3339 |
- (sec->output_section->vma |
| 3340 |
+ sec->output_offset |
| 3341 |
+ irel->r_offset)); |
| 3342 |
else |
| 3343 |
abort (); |
| 3344 |
} |
| 3345 |
|
| 3346 |
value += irel->r_addend; |
| 3347 |
|
| 3348 |
/* See if the value will fit in 24 bits. |
| 3349 |
We allow any 16bit match here. We prune those we can't |
| 3350 |
handle below. */ |
| 3351 |
if ((long) value < 0x7fffff && (long) value > -0x800000) |
| 3352 |
{ |
| 3353 |
unsigned char code; |
| 3354 |
|
| 3355 |
/* AM33 insns which have 32bit operands are 7 bytes long and |
| 3356 |
will have 0xfe as the first byte. */ |
| 3357 |
|
| 3358 |
/* Get the first opcode. */ |
| 3359 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 3); |
| 3360 |
|
| 3361 |
if (code == 0xfe) |
| 3362 |
{ |
| 3363 |
/* Get the second opcode. */ |
| 3364 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 3365 |
|
| 3366 |
/* All the am33 32 -> 24 relaxing possibilities. */ |
| 3367 |
/* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit |
| 3368 |
equivalent instructions exists. */ |
| 3369 |
if (code != 0x6b && code != 0x7b |
| 3370 |
&& code != 0x8b && code != 0x9b |
| 3371 |
&& (ELF32_R_TYPE (irel->r_info) |
| 3372 |
!= (int) R_MN10300_GOTPC32) |
| 3373 |
&& ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08 |
| 3374 |
|| (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b |
| 3375 |
|| (code & 0x0f) == 0x0e)) |
| 3376 |
{ |
| 3377 |
/* Not safe if the high bit is on as relaxing may |
| 3378 |
move the value out of high mem and thus not fit |
| 3379 |
in a signed 16bit value. This is currently over |
| 3380 |
conservative. */ |
| 3381 |
if ((value & 0x8000) == 0) |
| 3382 |
{ |
| 3383 |
/* Note that we've changed the relocation contents, |
| 3384 |
etc. */ |
| 3385 |
elf_section_data (sec)->relocs = internal_relocs; |
| 3386 |
elf_section_data (sec)->this_hdr.contents = contents; |
| 3387 |
symtab_hdr->contents = (unsigned char *) isymbuf; |
| 3388 |
|
| 3389 |
/* Fix the opcode. */ |
| 3390 |
bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3); |
| 3391 |
bfd_put_8 (abfd, code, contents + irel->r_offset - 2); |
| 3392 |
|
| 3393 |
/* Fix the relocation's type. */ |
| 3394 |
irel->r_info = |
| 3395 |
ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 3396 |
(ELF32_R_TYPE (irel->r_info) |
| 3397 |
== (int) R_MN10300_GOTOFF32) |
| 3398 |
? R_MN10300_GOTOFF24 |
| 3399 |
: (ELF32_R_TYPE (irel->r_info) |
| 3400 |
== (int) R_MN10300_GOT32) |
| 3401 |
? R_MN10300_GOT24 : |
| 3402 |
R_MN10300_24); |
| 3403 |
|
| 3404 |
/* Delete one byte of data. */ |
| 3405 |
if (!mn10300_elf_relax_delete_bytes (abfd, sec, |
| 3406 |
irel->r_offset + 3, 1)) |
| 3407 |
goto error_return; |
| 3408 |
|
| 3409 |
/* That will change things, so, we should relax |
| 3410 |
again. Note that this is not required, and it |
| 3411 |
may be slow. */ |
| 3412 |
*again = TRUE; |
| 3413 |
break; |
| 3414 |
} |
| 3415 |
} |
| 3416 |
} |
| 3417 |
} |
| 3418 |
|
| 3419 |
/* See if the value will fit in 16 bits. |
| 3420 |
We allow any 16bit match here. We prune those we can't |
| 3421 |
handle below. */ |
| 3422 |
if ((long) value < 0x7fff && (long) value > -0x8000) |
| 3423 |
{ |
| 3424 |
unsigned char code; |
| 3425 |
|
| 3426 |
/* Most insns which have 32bit operands are 6 bytes long; |
| 3427 |
exceptions are pcrel insns and bit insns. |
| 3428 |
|
| 3429 |
We handle pcrel insns above. We don't bother trying |
| 3430 |
to handle the bit insns here. |
| 3431 |
|
| 3432 |
The first byte of the remaining insns will be 0xfc. */ |
| 3433 |
|
| 3434 |
/* Get the first opcode. */ |
| 3435 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 2); |
| 3436 |
|
| 3437 |
if (code != 0xfc) |
| 3438 |
continue; |
| 3439 |
|
| 3440 |
/* Get the second opcode. */ |
| 3441 |
code = bfd_get_8 (abfd, contents + irel->r_offset - 1); |
| 3442 |
|
| 3443 |
if ((code & 0xf0) < 0x80) |
|