74541ad4c0
* elf-bfd.h (struct elf_link_hash_table): Reorder. Add
text_index_section and data_index_section.
(struct elf_backend_data): Add elf_backend_init_index_section.
(_bfd_elf_init_1_index_section): Declare.
(_bfd_elf_init_2_index_sections): Declare.
* elfxx-target.h (elf_backend_init_index_section): Define.
(elfNN_bed): Init new field.
* elflink.c (_bfd_elf_link_omit_section_dynsym): Keep first tls
section and text_index_section plus data_index_section.
(_bfd_elf_link_renumber_dynsyms): Clear dynindx on omitted sections.
(_bfd_elf_init_1_index_section): New function.
(_bfd_elf_init_2_index_sections): New function.
(bfd_elf_size_dynsym_hash_dynstr): Call elf_backend_init_index_section.
(elf_link_input_bfd): When emitting relocs, use text_index_section
and data_index_section for removed sections.
* elf-m10300.c (elf_backend_omit_section_dynsym): Define.
* elf32-i386.c: Likewise.
* elf32-m32r.c: Likewise.
* elf32-sh.c: Likewise.
* elf32-xstormy16.c: Likewise.
* elf32-xtensa.c: Likewise.
* elf64-alpha.c: Likewise.
* elf64-hppa.c: Likewise.
* elf64-mmix.c: Likewise.
* elf64-sh64.c: Likewise.
* elfxx-ia64.c: Likewise.
* elf32-arm.c (elf32_arm_final_link_relocate): Use text_index_section
and data_index_section sym for relocs against sections with no dynamic
section sym.
(elf_backend_init_index_section): Define.
* elf32-cris.c: Similarly.
* elf32-hppa.c: Similarly.
* elf32-i370.c: Similarly.
* elf32-m68k.c: Similarly.
* elf32-mips.c: Similarly.
* elf32-ppc.c: Similarly.
* elf32-s390.c: Similarly.
* elf32-sparc.c: Similarly.
* elf32-vax.c: Similarly.
* elf64-mips.c: Similarly.
* elf64-ppc.c: Similarly.
* elf64-s390.c: Similarly.
* elf64-sparc.c: Similarly.
* elf64-x86-64.c: Similarly.
* elfn32-mips.c: Similarly.
* elfxx-mips.c: Similarly.
* elfxx-sparc.c: Similarly.
* linker.c (fix_syms): Base symbols in removed sections on
previous section in preference to using absolute section.
ld/
* ldlang.c (strip_excluded_output_sections): Do strip sections
that define syms, but don't ignore them.
* ld.texinfo (Output Section Discarding): Revise.
* emultempl/armcoff.em (gld${EMULATION_NAME}_finish): Always call
finish_default.
ld/testsuite/
Update for section sym changes.
1013 lines
29 KiB
C
1013 lines
29 KiB
C
/* Xstormy16-specific support for 32-bit ELF.
|
||
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
|
||
Free Software Foundation, Inc.
|
||
|
||
This file is part of BFD, the Binary File Descriptor library.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
|
||
USA. */
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "libbfd.h"
|
||
#include "elf-bfd.h"
|
||
#include "elf/xstormy16.h"
|
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#include "libiberty.h"
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||
|
||
/* Handle the R_XSTORMY16_24 reloc, which has an odd bit arrangement. */
|
||
|
||
static bfd_reloc_status_type
|
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xstormy16_elf_24_reloc (bfd *abfd,
|
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arelent *reloc_entry,
|
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asymbol *symbol,
|
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void * data,
|
||
asection *input_section,
|
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bfd *output_bfd,
|
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char **error_message ATTRIBUTE_UNUSED)
|
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{
|
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bfd_vma relocation, x;
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||
|
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if (output_bfd != NULL)
|
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{
|
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reloc_entry->address += input_section->output_offset;
|
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return bfd_reloc_ok;
|
||
}
|
||
|
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if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
|
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return bfd_reloc_outofrange;
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||
|
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if (bfd_is_com_section (symbol->section))
|
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relocation = 0;
|
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else
|
||
relocation = symbol->value;
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
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relocation += reloc_entry->addend;
|
||
|
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x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
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x &= 0x0000ff00;
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x |= relocation & 0xff;
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x |= (relocation << 8) & 0xffff0000;
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bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address);
|
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|
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if (relocation & ~ (bfd_vma) 0xffffff)
|
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return bfd_reloc_overflow;
|
||
|
||
return bfd_reloc_ok;
|
||
}
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||
|
||
static reloc_howto_type xstormy16_elf_howto_table [] =
|
||
{
|
||
/* This reloc does nothing. */
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HOWTO (R_XSTORMY16_NONE, /* type */
|
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0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
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FALSE, /* pc_relative */
|
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_NONE", /* name */
|
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FALSE, /* partial_inplace */
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0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
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/* A 32 bit absolute relocation. */
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HOWTO (R_XSTORMY16_32, /* type */
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0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
|
||
FALSE, /* pc_relative */
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||
0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
|
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bfd_elf_generic_reloc, /* special_function */
|
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"R_XSTORMY16_32", /* name */
|
||
FALSE, /* partial_inplace */
|
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0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
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FALSE), /* pcrel_offset */
|
||
|
||
/* A 16 bit absolute relocation. */
|
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HOWTO (R_XSTORMY16_16, /* type */
|
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0, /* rightshift */
|
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1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
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0, /* bitpos */
|
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complain_overflow_bitfield, /* complain_on_overflow */
|
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bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* An 8 bit absolute relocation. */
|
||
HOWTO (R_XSTORMY16_8, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_8", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
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0xff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 32 bit pc-relative relocation. */
|
||
HOWTO (R_XSTORMY16_PC32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
TRUE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_PC32", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* A 16 bit pc-relative relocation. */
|
||
HOWTO (R_XSTORMY16_PC16, /* type */
|
||
0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
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TRUE, /* pc_relative */
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||
0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
|
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bfd_elf_generic_reloc, /* special_function */
|
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"R_XSTORMY16_PC16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* An 8 bit pc-relative relocation. */
|
||
HOWTO (R_XSTORMY16_PC8, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
TRUE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_PC8", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* A 12-bit pc-relative relocation suitable for the branch instructions. */
|
||
HOWTO (R_XSTORMY16_REL_12, /* type */
|
||
1, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
11, /* bitsize */
|
||
TRUE, /* pc_relative */
|
||
1, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_REL_12", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x0ffe, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* A 24-bit absolute relocation suitable for the jump instructions. */
|
||
HOWTO (R_XSTORMY16_24, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
24, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
xstormy16_elf_24_reloc, /* special_function */
|
||
"R_XSTORMY16_24", /* name */
|
||
TRUE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff00ff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* A 16 bit absolute relocation to a function pointer. */
|
||
HOWTO (R_XSTORMY16_FPTR16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_FPTR16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* Low order 16 bit value of a high memory address. */
|
||
HOWTO (R_XSTORMY16_LO16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_LO16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* High order 16 bit value of a high memory address. */
|
||
HOWTO (R_XSTORMY16_HI16, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_HI16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 12 bit absolute relocation. */
|
||
HOWTO (R_XSTORMY16_12, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
12, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_XSTORMY16_12", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0x0fff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
};
|
||
|
||
static reloc_howto_type xstormy16_elf_howto_table2 [] =
|
||
{
|
||
/* GNU extension to record C++ vtable hierarchy */
|
||
HOWTO (R_XSTORMY16_GNU_VTINHERIT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
NULL, /* special_function */
|
||
"R_XSTORMY16_GNU_VTINHERIT", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable member usage */
|
||
HOWTO (R_XSTORMY16_GNU_VTENTRY, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
|
||
"R_XSTORMY16_GNU_VTENTRY", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
};
|
||
|
||
/* Map BFD reloc types to XSTORMY16 ELF reloc types. */
|
||
|
||
typedef struct xstormy16_reloc_map
|
||
{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned int xstormy16_reloc_val;
|
||
reloc_howto_type * table;
|
||
} reloc_map;
|
||
|
||
static const reloc_map xstormy16_reloc_map [] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_XSTORMY16_NONE, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_32, R_XSTORMY16_32, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_16, R_XSTORMY16_16, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_8, R_XSTORMY16_8, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_32_PCREL, R_XSTORMY16_PC32, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_16_PCREL, R_XSTORMY16_PC16, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_8_PCREL, R_XSTORMY16_PC8, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_XSTORMY16_REL_12, R_XSTORMY16_REL_12, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_XSTORMY16_24, R_XSTORMY16_24, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_XSTORMY16_FPTR16, R_XSTORMY16_FPTR16, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_LO16, R_XSTORMY16_LO16, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_HI16, R_XSTORMY16_HI16, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_XSTORMY16_12, R_XSTORMY16_12, xstormy16_elf_howto_table },
|
||
{ BFD_RELOC_VTABLE_INHERIT, R_XSTORMY16_GNU_VTINHERIT, xstormy16_elf_howto_table2 },
|
||
{ BFD_RELOC_VTABLE_ENTRY, R_XSTORMY16_GNU_VTENTRY, xstormy16_elf_howto_table2 },
|
||
};
|
||
|
||
static reloc_howto_type *
|
||
xstormy16_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
|
||
bfd_reloc_code_real_type code)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = ARRAY_SIZE (xstormy16_reloc_map); --i;)
|
||
{
|
||
const reloc_map * entry;
|
||
|
||
entry = xstormy16_reloc_map + i;
|
||
|
||
if (entry->bfd_reloc_val == code)
|
||
return entry->table + (entry->xstormy16_reloc_val
|
||
- entry->table[0].type);
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Set the howto pointer for an XSTORMY16 ELF reloc. */
|
||
|
||
static void
|
||
xstormy16_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
|
||
arelent * cache_ptr,
|
||
Elf_Internal_Rela * dst)
|
||
{
|
||
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
|
||
|
||
if (r_type <= (unsigned int) R_XSTORMY16_12)
|
||
cache_ptr->howto = &xstormy16_elf_howto_table [r_type];
|
||
else if (r_type - R_XSTORMY16_GNU_VTINHERIT
|
||
<= (unsigned int) R_XSTORMY16_GNU_VTENTRY)
|
||
cache_ptr->howto
|
||
= &xstormy16_elf_howto_table2 [r_type - R_XSTORMY16_GNU_VTINHERIT];
|
||
else
|
||
abort ();
|
||
}
|
||
|
||
/* We support 16-bit pointers to code above 64k by generating a thunk
|
||
below 64k containing a JMPF instruction to the final address. We
|
||
cannot, unfortunately, minimize the number of thunks unless the
|
||
-relax switch is given, as otherwise we have no idea where the
|
||
sections will fall in the address space. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_check_relocs (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
asection *sec,
|
||
const Elf_Internal_Rela *relocs)
|
||
{
|
||
const Elf_Internal_Rela *rel, *relend;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
bfd_vma *local_plt_offsets;
|
||
asection *splt;
|
||
bfd *dynobj;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_plt_offsets = elf_local_got_offsets (abfd);
|
||
splt = NULL;
|
||
dynobj = elf_hash_table(info)->dynobj;
|
||
|
||
relend = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < relend; ++rel)
|
||
{
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_vma *offset;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
/* This relocation describes a 16-bit pointer to a function.
|
||
We may need to allocate a thunk in low memory; reserve memory
|
||
for it now. */
|
||
case R_XSTORMY16_FPTR16:
|
||
if (rel->r_addend != 0)
|
||
{
|
||
(*info->callbacks->warning)
|
||
(info, _("non-zero addend in @fptr reloc"), 0,
|
||
abfd, 0, 0);
|
||
}
|
||
|
||
if (dynobj == NULL)
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
if (splt == NULL)
|
||
{
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
if (splt == NULL)
|
||
{
|
||
splt = bfd_make_section_with_flags (dynobj, ".plt",
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY
|
||
| SEC_CODE));
|
||
|
||
if (splt == NULL
|
||
|| ! bfd_set_section_alignment (dynobj, splt, 1))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (h != NULL)
|
||
offset = &h->plt.offset;
|
||
else
|
||
{
|
||
if (local_plt_offsets == NULL)
|
||
{
|
||
size_t size;
|
||
unsigned int i;
|
||
|
||
size = symtab_hdr->sh_info * sizeof (bfd_vma);
|
||
local_plt_offsets = bfd_alloc (abfd, size);
|
||
if (local_plt_offsets == NULL)
|
||
return FALSE;
|
||
elf_local_got_offsets (abfd) = local_plt_offsets;
|
||
|
||
for (i = 0; i < symtab_hdr->sh_info; i++)
|
||
local_plt_offsets[i] = (bfd_vma) -1;
|
||
}
|
||
offset = &local_plt_offsets[r_symndx];
|
||
}
|
||
|
||
if (*offset == (bfd_vma) -1)
|
||
{
|
||
*offset = splt->size;
|
||
splt->size += 4;
|
||
}
|
||
break;
|
||
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_XSTORMY16_GNU_VTINHERIT:
|
||
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return FALSE;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries are actually
|
||
used. Record for later use during GC. */
|
||
case R_XSTORMY16_GNU_VTENTRY:
|
||
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* A subroutine of xstormy16_elf_relax_section. If the global symbol H
|
||
is within the low 64k, remove any entry for it in the plt. */
|
||
|
||
struct relax_plt_data
|
||
{
|
||
asection *splt;
|
||
bfd_boolean *again;
|
||
};
|
||
|
||
static bfd_boolean
|
||
xstormy16_relax_plt_check (struct elf_link_hash_entry *h, void * xdata)
|
||
{
|
||
struct relax_plt_data *data = (struct relax_plt_data *) xdata;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
bfd_vma address;
|
||
|
||
if (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
address = 0;
|
||
else
|
||
address = (h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset
|
||
+ h->root.u.def.value);
|
||
|
||
if (address <= 0xffff)
|
||
{
|
||
h->plt.offset = -1;
|
||
data->splt->size -= 4;
|
||
*data->again = TRUE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* A subroutine of xstormy16_elf_relax_section. If the global symbol H
|
||
previously had a plt entry, give it a new entry offset. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata)
|
||
{
|
||
bfd_vma *entry = (bfd_vma *) xdata;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
h->plt.offset = *entry;
|
||
*entry += 4;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_relax_section (bfd *dynobj,
|
||
asection *splt,
|
||
struct bfd_link_info *info,
|
||
bfd_boolean *again)
|
||
{
|
||
struct relax_plt_data relax_plt_data;
|
||
bfd *ibfd;
|
||
|
||
/* Assume nothing changes. */
|
||
*again = FALSE;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
/* We only relax the .plt section at the moment. */
|
||
if (dynobj != elf_hash_table (info)->dynobj
|
||
|| strcmp (splt->name, ".plt") != 0)
|
||
return TRUE;
|
||
|
||
/* Quick check for an empty plt. */
|
||
if (splt->size == 0)
|
||
return TRUE;
|
||
|
||
/* Map across all global symbols; see which ones happen to
|
||
fall in the low 64k. */
|
||
relax_plt_data.splt = splt;
|
||
relax_plt_data.again = again;
|
||
elf_link_hash_traverse (elf_hash_table (info), xstormy16_relax_plt_check,
|
||
&relax_plt_data);
|
||
|
||
/* Likewise for local symbols, though that's somewhat less convenient
|
||
as we have to walk the list of input bfds and swap in symbol data. */
|
||
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
|
||
{
|
||
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Sym *isymbuf = NULL;
|
||
unsigned int idx;
|
||
|
||
if (! local_plt_offsets)
|
||
continue;
|
||
|
||
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
||
if (symtab_hdr->sh_info != 0)
|
||
{
|
||
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
||
if (isymbuf == NULL)
|
||
isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
|
||
symtab_hdr->sh_info, 0,
|
||
NULL, NULL, NULL);
|
||
if (isymbuf == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
|
||
{
|
||
Elf_Internal_Sym *isym;
|
||
asection *tsec;
|
||
bfd_vma address;
|
||
|
||
if (local_plt_offsets[idx] == (bfd_vma) -1)
|
||
continue;
|
||
|
||
isym = &isymbuf[idx];
|
||
if (isym->st_shndx == SHN_UNDEF)
|
||
continue;
|
||
else if (isym->st_shndx == SHN_ABS)
|
||
tsec = bfd_abs_section_ptr;
|
||
else if (isym->st_shndx == SHN_COMMON)
|
||
tsec = bfd_com_section_ptr;
|
||
else
|
||
tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
|
||
|
||
address = (tsec->output_section->vma
|
||
+ tsec->output_offset
|
||
+ isym->st_value);
|
||
if (address <= 0xffff)
|
||
{
|
||
local_plt_offsets[idx] = -1;
|
||
splt->size -= 4;
|
||
*again = TRUE;
|
||
}
|
||
}
|
||
|
||
if (isymbuf != NULL
|
||
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
||
{
|
||
if (! info->keep_memory)
|
||
free (isymbuf);
|
||
else
|
||
{
|
||
/* Cache the symbols for elf_link_input_bfd. */
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If we changed anything, walk the symbols again to reallocate
|
||
.plt entry addresses. */
|
||
if (*again && splt->size > 0)
|
||
{
|
||
bfd_vma entry = 0;
|
||
|
||
elf_link_hash_traverse (elf_hash_table (info),
|
||
xstormy16_relax_plt_realloc, &entry);
|
||
|
||
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
|
||
{
|
||
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
|
||
unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
|
||
unsigned int idx;
|
||
|
||
if (! local_plt_offsets)
|
||
continue;
|
||
|
||
for (idx = 0; idx < nlocals; ++idx)
|
||
if (local_plt_offsets[idx] != (bfd_vma) -1)
|
||
{
|
||
local_plt_offsets[idx] = entry;
|
||
entry += 4;
|
||
}
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *splt;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
if (dynobj == NULL)
|
||
return TRUE;
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL);
|
||
|
||
splt->contents = bfd_zalloc (dynobj, splt->size);
|
||
if (splt->contents == NULL)
|
||
return FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Relocate an XSTORMY16 ELF section.
|
||
|
||
The RELOCATE_SECTION function is called by the new ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjusting the section contents as
|
||
necessary, and (if using Rela relocs and generating a relocatable
|
||
output file) adjusting the reloc addend as necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocatable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info * info,
|
||
bfd * input_bfd,
|
||
asection * input_section,
|
||
bfd_byte * contents,
|
||
Elf_Internal_Rela * relocs,
|
||
Elf_Internal_Sym * local_syms,
|
||
asection ** local_sections)
|
||
{
|
||
Elf_Internal_Shdr * symtab_hdr;
|
||
struct elf_link_hash_entry ** sym_hashes;
|
||
Elf_Internal_Rela * rel;
|
||
Elf_Internal_Rela * relend;
|
||
bfd *dynobj;
|
||
asection *splt;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
relend = relocs + input_section->reloc_count;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
splt = NULL;
|
||
if (dynobj != NULL)
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
|
||
for (rel = relocs; rel < relend; rel ++)
|
||
{
|
||
reloc_howto_type * howto;
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym * sym;
|
||
asection * sec;
|
||
struct elf_link_hash_entry * h;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
const char * name = NULL;
|
||
int r_type;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
if ( r_type == R_XSTORMY16_GNU_VTINHERIT
|
||
|| r_type == R_XSTORMY16_GNU_VTENTRY)
|
||
continue;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
howto = xstormy16_elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections [r_symndx];
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
||
}
|
||
else
|
||
{
|
||
bfd_boolean unresolved_reloc, warned;
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned);
|
||
}
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
if (name == NULL || *name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_XSTORMY16_24:
|
||
{
|
||
bfd_vma reloc = relocation + rel->r_addend;
|
||
unsigned int x;
|
||
|
||
x = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
x &= 0x0000ff00;
|
||
x |= reloc & 0xff;
|
||
x |= (reloc << 8) & 0xffff0000;
|
||
bfd_put_32 (input_bfd, x, contents + rel->r_offset);
|
||
|
||
if (reloc & ~0xffffff)
|
||
r = bfd_reloc_overflow;
|
||
else
|
||
r = bfd_reloc_ok;
|
||
break;
|
||
}
|
||
|
||
case R_XSTORMY16_FPTR16:
|
||
{
|
||
bfd_vma *plt_offset;
|
||
|
||
if (h != NULL)
|
||
plt_offset = &h->plt.offset;
|
||
else
|
||
plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
|
||
|
||
if (relocation <= 0xffff)
|
||
{
|
||
/* If the symbol is in range for a 16-bit address, we should
|
||
have deallocated the plt entry in relax_section. */
|
||
BFD_ASSERT (*plt_offset == (bfd_vma) -1);
|
||
}
|
||
else
|
||
{
|
||
/* If the symbol is out of range for a 16-bit address,
|
||
we must have allocated a plt entry. */
|
||
BFD_ASSERT (*plt_offset != (bfd_vma) -1);
|
||
|
||
/* If this is the first time we've processed this symbol,
|
||
fill in the plt entry with the correct symbol address. */
|
||
if ((*plt_offset & 1) == 0)
|
||
{
|
||
unsigned int x;
|
||
|
||
x = 0x00000200; /* jmpf */
|
||
x |= relocation & 0xff;
|
||
x |= (relocation << 8) & 0xffff0000;
|
||
bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
|
||
*plt_offset |= 1;
|
||
}
|
||
|
||
relocation = (splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ (*plt_offset & -2));
|
||
}
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, 0);
|
||
break;
|
||
}
|
||
|
||
default:
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
break;
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char * msg = NULL;
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
r = info->callbacks->reloc_overflow
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
||
break;
|
||
|
||
case bfd_reloc_undefined:
|
||
r = info->callbacks->undefined_symbol
|
||
(info, name, input_bfd, input_section, rel->r_offset,
|
||
TRUE);
|
||
break;
|
||
|
||
case bfd_reloc_outofrange:
|
||
msg = _("internal error: out of range error");
|
||
break;
|
||
|
||
case bfd_reloc_notsupported:
|
||
msg = _("internal error: unsupported relocation error");
|
||
break;
|
||
|
||
case bfd_reloc_dangerous:
|
||
msg = _("internal error: dangerous relocation");
|
||
break;
|
||
|
||
default:
|
||
msg = _("internal error: unknown error");
|
||
break;
|
||
}
|
||
|
||
if (msg)
|
||
r = info->callbacks->warning
|
||
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
||
|
||
if (! r)
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* This must exist if dynobj is ever set. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *splt;
|
||
|
||
/* As an extra sanity check, verify that all plt entries have
|
||
been filled in. */
|
||
|
||
if ((dynobj = elf_hash_table (info)->dynobj) != NULL
|
||
&& (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
|
||
{
|
||
bfd_byte *contents = splt->contents;
|
||
unsigned int i, size = splt->size;
|
||
|
||
for (i = 0; i < size; i += 4)
|
||
{
|
||
unsigned int x = bfd_get_32 (dynobj, contents + i);
|
||
|
||
BFD_ASSERT (x != 0);
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
xstormy16_elf_gc_mark_hook (asection *sec,
|
||
struct bfd_link_info *info,
|
||
Elf_Internal_Rela *rel,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym *sym)
|
||
{
|
||
if (h != NULL)
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_XSTORMY16_GNU_VTINHERIT:
|
||
case R_XSTORMY16_GNU_VTENTRY:
|
||
return NULL;
|
||
}
|
||
|
||
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
||
}
|
||
|
||
#define ELF_ARCH bfd_arch_xstormy16
|
||
#define ELF_MACHINE_CODE EM_XSTORMY16
|
||
#define ELF_MAXPAGESIZE 0x100
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_xstormy16_vec
|
||
#define TARGET_LITTLE_NAME "elf32-xstormy16"
|
||
|
||
#define elf_info_to_howto_rel NULL
|
||
#define elf_info_to_howto xstormy16_info_to_howto_rela
|
||
#define elf_backend_relocate_section xstormy16_elf_relocate_section
|
||
#define elf_backend_gc_mark_hook xstormy16_elf_gc_mark_hook
|
||
#define elf_backend_check_relocs xstormy16_elf_check_relocs
|
||
#define elf_backend_always_size_sections \
|
||
xstormy16_elf_always_size_sections
|
||
#define elf_backend_omit_section_dynsym \
|
||
((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
|
||
#define elf_backend_finish_dynamic_sections \
|
||
xstormy16_elf_finish_dynamic_sections
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup xstormy16_reloc_type_lookup
|
||
#define bfd_elf32_bfd_relax_section xstormy16_elf_relax_section
|
||
|
||
#include "elf32-target.h"
|