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binutils-gdb/bfd/elf32-xgate.c
Alan Modra 1594e052d4 xgate cleanup 
elf32-xgate.c contains many functions that are only stubs and
elf32-xgate.h contains unused declarations.  While this might be
reasonable for the initial commit of a port with subsequent work
fleshing out the stubs, xgate has only had two minor target specific
patches since the initial commit over six years ago.  The rest of the
changes have been general maintenance work applied to all ELF targets,
and some of this work could have been avoided if the stubs hadn't been
there.  So this patch removes all the stubs.

I've kept the functionality of the old elf32_xgate_add_symbol_hook,
implemented in elf32_xgate_backend_symbol_processing.  Presumably,
that's to set the symbol st_target_internal flag for use in
elf32-m68hc1x.c:elf32_m68hc11_relocate_section.

The empty elf32_xgate_relocate_section meant that xgate had no linker.
Or at least, no linker relocation processing.  Deleting the
elf_backend_relocate_section define means the target will now use the
generic linker reloc processing.  How good that is will depend on the
accuracy of the reloc howtos..

I haven't updated the ld testsuite to xfail tests expected to fail
for generic elf targets.

bfd/
	* elf32-xgate.h: Delete.
	* elf32-xgate.c: Delete unnecessary forward declarations, add two
	that are now needed.
	(xgate_elf_bfd_link_hash_table_create)
	(xgate_elf_bfd_link_hash_table_free)
	(xgate_elf_set_mach_from_flags, struct xgate_scan_param)
	(stub_hash_newfunc, elf32_xgate_add_symbol_hook)
	(elf32_xgate_setup_section_lists, elf32_xgate_size_stubs)
	(elf32_xgate_build_stubs, elf32_xgate_check_relocs)
	(elf32_xgate_relocate_section, _bfd_xgate_elf_set_private_flags)
	(elf32_xgate_post_process_headers): Delete.
	(elf32_xgate_backend_symbol_processing): New function.
	(xgate_elf_ignore_reloc, xgate_elf_special_reloc)
	(_bfd_xgate_elf_print_private_bfd_data): Make static.
	(ELF_TARGET_ID, elf_info_to_howto, elf_backend_check_relocs)
	(elf_backend_relocate_section, elf_backend_object_p)
	(elf_backend_final_write_processing, elf_backend_can_gc_sections)
	(elf_backend_post_process_headers, elf_backend_add_symbol_hook)
	(bfd_elf32_bfd_link_hash_table_create)
	(bfd_elf32_bfd_set_private_flags)
	(xgate_stub_hash_lookup): Don't define.
	(elf_backend_symbol_processing): Define.
	* elf-bfd.h (elf_target_id): Delete XGATE_ELF_DATA.
ld/
	* emulparams/xgateelf.sh (TEMPLATE_NAME) Set to generic.
	(EXTRA_EM_FILE): Set to genelf.
2018-07-10 23:59:07 +09:30

528 lines
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/* Freescale XGATE-specific support for 32-bit ELF
Copyright (C) 2010-2018 Free Software Foundation, Inc.
Contributed by Sean Keys(skeys@ipdatasys.com)
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 3 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 "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/xgate.h"
#include "opcode/xgate.h"
#include "libiberty.h"
/* Forward declarations. */
static bfd_reloc_status_type xgate_elf_ignore_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static bfd_reloc_status_type xgate_elf_special_reloc
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
/* Use REL instead of RELA to save space */
#define USE_REL 1
static reloc_howto_type elf_xgate_howto_table[] =
{
/* This reloc does nothing. */
HOWTO (R_XGATE_NONE, /* type */
0, /* rightshift */
3, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_XGATE_NONE", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 8 bit absolute relocation. */
HOWTO (R_XGATE_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_XGATE_8", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 8 bit PC-rel relocation. */
HOWTO (R_XGATE_PCREL_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_XGATE_PCREL_8", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
TRUE), /* pcrel_offset */
/* A 16 bit absolute relocation. */
HOWTO (R_XGATE_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont /*bitfield */, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_XGATE_16", /* name */
FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 32 bit absolute relocation. This one is never used for the
code relocation. It's used by gas for -gstabs generation. */
HOWTO (R_XGATE_32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_XGATE_32", /* name */
FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 16 bit PC-rel relocation. */
HOWTO (R_XGATE_PCREL_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_XGATE_PCREL_16", /* name */
FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
TRUE), /* pcrel_offset */
/* GNU extension to record C++ vtable hierarchy. */
HOWTO (R_XGATE_GNU_VTINHERIT, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_XGATE_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_XGATE_GNU_VTENTRY, /* type */
0, /* rightshift */
1, /* 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_XGATE_GNU_VTENTRY", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 24 bit relocation. */
HOWTO (R_XGATE_24, /* 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_XGATE_IMM8_LO", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 16-bit low relocation. */
HOWTO (R_XGATE_LO16, /* type */
8, /* 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_XGATE_IMM8_HI", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A page relocation. */
HOWTO (R_XGATE_GPAGE, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
xgate_elf_special_reloc,/* special_function */
"R_XGATE_GPAGE", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 9 bit absolute relocation. */
HOWTO (R_XGATE_PCREL_9, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
9, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_XGATE_PCREL_9", /* name */
FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
TRUE), /* pcrel_offset */
/* A 8 bit absolute relocation (upper address). */
HOWTO (R_XGATE_PCREL_10, /* type */
8, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
10, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_XGATE_PCREL_10", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
TRUE), /* pcrel_offset */
/* A 8 bit absolute relocation. */
HOWTO (R_XGATE_IMM8_LO, /* 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_XGATE_IMM8_LO", /* name */
FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 16 bit absolute relocation (upper address). */
HOWTO (R_XGATE_IMM8_HI, /* type */
8, /* 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_XGATE_IMM8_HI", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 3 bit absolute relocation. */
HOWTO (R_XGATE_IMM3, /* type */
8, /* 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_XGATE_IMM3", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 4 bit absolute relocation. */
HOWTO (R_XGATE_IMM4, /* type */
8, /* 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_XGATE_IMM4", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
FALSE), /* pcrel_offset */
/* A 5 bit absolute relocation. */
HOWTO (R_XGATE_IMM5, /* type */
8, /* 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_XGATE_IMM5", /* name */
FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
FALSE), /* pcrel_offset */
/* Mark beginning of a jump instruction (any form). */
HOWTO (R_XGATE_RL_JUMP, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
xgate_elf_ignore_reloc, /* special_function */
"R_XGATE_RL_JUMP", /* name */
TRUE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
TRUE), /* pcrel_offset */
/* Mark beginning of Gcc relaxation group instruction. */
HOWTO (R_XGATE_RL_GROUP, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
xgate_elf_ignore_reloc, /* special_function */
"R_XGATE_RL_GROUP", /* name */
TRUE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
TRUE), /* pcrel_offset */
};
/* Map BFD reloc types to XGATE ELF reloc types. */
struct xgate_reloc_map
{
bfd_reloc_code_real_type bfd_reloc_val;
unsigned char elf_reloc_val;
};
static const struct xgate_reloc_map xgate_reloc_map[] =
{
{BFD_RELOC_NONE, R_XGATE_NONE},
{BFD_RELOC_8, R_XGATE_8},
{BFD_RELOC_8_PCREL, R_XGATE_PCREL_8},
{BFD_RELOC_16_PCREL, R_XGATE_PCREL_16},
{BFD_RELOC_16, R_XGATE_16},
{BFD_RELOC_32, R_XGATE_32},
{BFD_RELOC_VTABLE_INHERIT, R_XGATE_GNU_VTINHERIT},
{BFD_RELOC_VTABLE_ENTRY, R_XGATE_GNU_VTENTRY},
{BFD_RELOC_XGATE_LO16, R_XGATE_LO16},
{BFD_RELOC_XGATE_GPAGE, R_XGATE_GPAGE},
{BFD_RELOC_XGATE_24, R_XGATE_24},
{BFD_RELOC_XGATE_PCREL_9, R_XGATE_PCREL_9},
{BFD_RELOC_XGATE_PCREL_10, R_XGATE_PCREL_10},
{BFD_RELOC_XGATE_IMM8_LO, R_XGATE_IMM8_LO},
{BFD_RELOC_XGATE_IMM8_HI, R_XGATE_IMM8_HI},
{BFD_RELOC_XGATE_IMM3, R_XGATE_IMM3},
{BFD_RELOC_XGATE_IMM4, R_XGATE_IMM4},
{BFD_RELOC_XGATE_IMM5, R_XGATE_IMM5},
{BFD_RELOC_XGATE_RL_JUMP, R_XGATE_RL_JUMP},
{BFD_RELOC_XGATE_RL_GROUP, R_XGATE_RL_GROUP},
};
static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE (xgate_reloc_map); i++)
if (xgate_reloc_map[i].bfd_reloc_val == code)
return &elf_xgate_howto_table[xgate_reloc_map[i].elf_reloc_val];
return NULL;
}
static reloc_howto_type *
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE (elf_xgate_howto_table); i++)
if (elf_xgate_howto_table[i].name != NULL
&& strcasecmp (elf_xgate_howto_table[i].name, r_name) == 0)
return &elf_xgate_howto_table[i];
return NULL;
}
/* Set the howto pointer for an XGATE ELF reloc. */
static bfd_boolean
xgate_info_to_howto_rel (bfd *abfd,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int r_type;
r_type = ELF32_R_TYPE (dst->r_info);
if (r_type >= (unsigned int) R_XGATE_max)
{
/* xgettext:c-format */
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
abfd, r_type);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
cache_ptr->howto = &elf_xgate_howto_table[r_type];
return TRUE;
}
/* Specific sections:
- The .page0 is a data section that is mapped in [0x0000..0x00FF].
Page0 accesses are faster on the M68HC12.
- The .vectors is the section that represents the interrupt
vectors.
- The .xgate section is starts in 0xE08800 or as xgate sees it 0x0800. */
static const struct bfd_elf_special_section elf32_xgate_special_sections[] =
{
{ STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
{ STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC },
/*{ STRING_COMMA_LEN (".xgate"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
TODO finish this implementation */
{ NULL, 0, 0, 0, 0 }
};
/* Hook called when reading symbols. */
static void
elf32_xgate_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
asymbol *sym)
{
/* Mark xgate symbols. */
((elf_symbol_type *) sym)->internal_elf_sym.st_target_internal = 1;
}
/* This function is used for relocs which are only used for relaxing,
which the linker should otherwise ignore. */
static bfd_reloc_status_type
xgate_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry,
asymbol *symbol ATTRIBUTE_UNUSED,
void *data ATTRIBUTE_UNUSED,
asection *input_section,
bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
if (output_bfd != NULL)
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
static bfd_reloc_status_type
xgate_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry ATTRIBUTE_UNUSED,
asymbol *symbol ATTRIBUTE_UNUSED,
void *data ATTRIBUTE_UNUSED,
asection *input_section ATTRIBUTE_UNUSED,
bfd *output_bfd ATTRIBUTE_UNUSED,
char **error_message ATTRIBUTE_UNUSED)
{
abort ();
}
static bfd_boolean
_bfd_xgate_elf_print_private_bfd_data (bfd *abfd, void *ptr)
{
FILE *file = (FILE *) ptr;
BFD_ASSERT (abfd != NULL && ptr != NULL);
/* Print normal ELF private data. */
_bfd_elf_print_private_bfd_data (abfd, ptr);
/* xgettext:c-format */
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
if (elf_elfheader (abfd)->e_flags & E_XGATE_I32)
fprintf (file, _("[abi=32-bit int, "));
else
fprintf (file, _("[abi=16-bit int, "));
if (elf_elfheader (abfd)->e_flags & E_XGATE_F64)
fprintf (file, _("64-bit double, "));
else
fprintf (file, _("32-bit double, "));
if (elf_elfheader (abfd)->e_flags & EF_XGATE_MACH)
fprintf (file, _("cpu=XGATE]"));
else
fprintf (file, _("error reading cpu type from elf private data"));
fputc ('\n', file);
return TRUE;
}
#define ELF_ARCH bfd_arch_xgate
#define ELF_MACHINE_CODE EM_XGATE
#define ELF_MAXPAGESIZE 0x1000
#define TARGET_BIG_SYM xgate_elf32_vec
#define TARGET_BIG_NAME "elf32-xgate"
#define elf_info_to_howto_rel xgate_info_to_howto_rel
#define elf_backend_special_sections elf32_xgate_special_sections
#define elf_backend_symbol_processing elf32_xgate_backend_symbol_processing
#define bfd_elf32_bfd_print_private_bfd_data _bfd_xgate_elf_print_private_bfd_data
#include "elf32-target.h"
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