/* Motorola 68HC12-specific support for 32-bit ELF
- Copyright 1999, 2000, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1999-2020 Free Software Foundation, Inc.
Contributed by Stephane Carrez (stcarrez@nerim.fr)
(Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com))
-This file is part of BFD, the Binary File Descriptor library.
+ 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 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.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 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 "bfd.h"
+#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
+#include "elf32-m68hc1x.h"
#include "elf/m68hc11.h"
#include "opcode/m68hc11.h"
+/* Relocation functions. */
static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
-PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
-static void m68hc11_info_to_howto_rel
-PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
-
-static bfd_reloc_status_type m68hc11_elf_ignore_reloc
-PARAMS ((bfd *abfd, arelent *reloc_entry,
- asymbol *symbol, PTR data, asection *input_section,
- bfd *output_bfd, char **error_message));
-static bfd_reloc_status_type m68hc12_elf_special_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static int m68hc12_addr_is_banked PARAMS ((bfd_vma));
-static bfd_vma m68hc12_phys_addr PARAMS ((bfd_vma));
-static bfd_vma m68hc12_phys_page PARAMS ((bfd_vma));
-
-boolean _bfd_m68hc12_elf_merge_private_bfd_data PARAMS ((bfd*, bfd*));
-boolean _bfd_m68hc12_elf_set_private_flags PARAMS ((bfd*, flagword));
-boolean _bfd_m68hc12_elf_print_private_bfd_data PARAMS ((bfd*, PTR));
+ (bfd *, bfd_reloc_code_real_type);
+static bfd_boolean m68hc11_info_to_howto_rel
+ (bfd *, arelent *, Elf_Internal_Rela *);
+/* Trampoline generation. */
/* Use REL instead of RELA to save space */
-#define USE_REL
+#define USE_REL 1
-/* The Motorola 68HC11 microcontroler only addresses 64Kb.
- We must handle 8 and 16-bit relocations. The 32-bit relocation
- is defined but not used except by gas when -gstabs is used (which
- is wrong).
-
- The 68HC12 microcontroler has a memory bank switching system
+/* The 68HC12 microcontroler has a memory bank switching system
with a 16Kb window in the 64Kb address space. The extended memory
is mapped in the 16Kb window (at 0x8000). The page register controls
which 16Kb bank is mapped. The call/rtc instructions take care of
Banked
Address Space
- | | Page n
+ | | Page n
+---------------+ 0x1010000
- | |
- | jsr _foo |
- | .. | Page 3
- | _foo: |
+ | |
+ | jsr _foo |
+ | .. | Page 3
+ | _foo: |
+---------------+ 0x100C000
- | |
- | call _bar |
- | .. | Page 2
- | _bar: |
+ | |
+ | call _bar |
+ | .. | Page 2
+ | _bar: |
+---------------+ 0x1008000
- /------>| |
- | | call _foo | Page 1
- | | |
+ /------>| |
+ | | call _foo | Page 1
+ | | |
| +---------------+ 0x1004000
- Physical | | |
- Address Space | | | Page 0
- | | |
+ Physical | | |
+ Address Space | | | Page 0
+ | | |
+-----------+ 0x00FFFF | +---------------+ 0x1000000
| | |
| call _foo | |
| | |
+-----------+ 0x00BFFF -+---/
- | | |
+ | | |
| | |
| | 16K |
| | |
The 'call _foo' must be relocated with page 3 and 16-bit address
- mapped at 0x8000.
+ mapped at 0x8000.
The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */
static reloc_howto_type elf_m68hc11_howto_table[] = {
/* This reloc does nothing. */
HOWTO (R_M68HC11_NONE, /* type */
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
+ 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_M68HC12_NONE", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 8 bit absolute relocation */
HOWTO (R_M68HC11_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC12_8", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 8 bit absolute relocation (upper address) */
HOWTO (R_M68HC11_HI8, /* type */
8, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC12_HI8", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 8 bit absolute relocation (upper address) */
HOWTO (R_M68HC11_LO8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC12_LO8", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 8 bit PC-rel relocation */
HOWTO (R_M68HC11_PCREL_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC12_PCREL_8", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
- false), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* A 16 bit absolute relocation */
HOWTO (R_M68HC11_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont /*bitfield */ , /* complain_on_overflow */
- m68hc12_elf_special_reloc, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"R_M68HC12_16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ 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. */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC12_32", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 3 bit absolute relocation */
HOWTO (R_M68HC11_3B, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
3, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC12_4B", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x003, /* src_mask */
0x003, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 16 bit PC-rel relocation */
HOWTO (R_M68HC11_PCREL_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- true, /* pc_relative */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M68HC12_PCREL_16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* GNU extension to record C++ vtable hierarchy */
HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_M68HC11_GNU_VTINHERIT", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* GNU extension to record C++ vtable member usage */
HOWTO (R_M68HC11_GNU_VTENTRY, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
"R_M68HC11_GNU_VTENTRY", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A 24 bit relocation */
- HOWTO (R_M68HC11_24, /* type */
+ HOWTO (R_M68HC11_24, /* type */
0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- m68hc12_elf_special_reloc, /* special_function */
+ m68hc11_elf_special_reloc, /* special_function */
"R_M68HC12_24", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
-
+ FALSE, /* partial_inplace */
+ 0xffffff, /* src_mask */
+ 0xffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
/* A 16-bit low relocation */
- HOWTO (R_M68HC11_LO16, /* type */
+ HOWTO (R_M68HC11_LO16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- m68hc12_elf_special_reloc,/* special_function */
+ m68hc11_elf_special_reloc,/* special_function */
"R_M68HC12_LO16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
/* A page relocation */
- HOWTO (R_M68HC11_PAGE, /* type */
+ HOWTO (R_M68HC11_PAGE, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- m68hc12_elf_special_reloc,/* special_function */
+ m68hc11_elf_special_reloc,/* special_function */
"R_M68HC12_PAGE", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x00ff, /* src_mask */
0x00ff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
EMPTY_HOWTO (14),
- EMPTY_HOWTO (15),
- EMPTY_HOWTO (16),
- EMPTY_HOWTO (17),
- EMPTY_HOWTO (18),
- EMPTY_HOWTO (19),
-
+
+ /* A 16 bit absolute relocation. */
+ HOWTO (R_M68HC12_16B, /* 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_M68HC12_16B", /* name */
+ FALSE, /* partial_inplace */
+ 0xffff, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 9 bit PC-rel relocation. */
+ HOWTO (R_M68HC12_PCREL_9, /* type */
+ 1, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 10, /* bitsize (result is >>1) */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M68HC12_PCREL_9", /* name */
+ TRUE, /* partial_inplace */
+ 0xfe00, /* src_mask */
+ 0x01ff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 10 bit PC-rel relocation. */
+ HOWTO (R_M68HC12_PCREL_10, /* type */
+ 1, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 11, /* bitsize (result is >>1) */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M68HC12_PCREL_10", /* name */
+ TRUE, /* partial_inplace */
+ 0xfc00, /* src_mask */
+ 0x03ff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 8 bit absolute relocation (upper address). */
+ HOWTO (R_M68HC12_HI8XG, /* type */
+ 8, /* 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_M68HC12_HI8XG", /* name */
+ FALSE, /* partial_inplace */
+ 0x00ff, /* src_mask */
+ 0x00ff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* A 8 bit absolute relocation (lower address). */
+ HOWTO (R_M68HC12_LO8XG, /* type */
+ 8, /* 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_M68HC12_LO8XG", /* name */
+ FALSE, /* partial_inplace */
+ 0x00ff, /* src_mask */
+ 0x00ff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
/* Mark beginning of a jump instruction (any form). */
HOWTO (R_M68HC11_RL_JUMP, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
m68hc11_elf_ignore_reloc, /* special_function */
"R_M68HC12_RL_JUMP", /* name */
- true, /* partial_inplace */
+ TRUE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
/* Mark beginning of Gcc relaxation group instruction. */
HOWTO (R_M68HC11_RL_GROUP, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
m68hc11_elf_ignore_reloc, /* special_function */
"R_M68HC12_RL_GROUP", /* name */
- true, /* partial_inplace */
+ TRUE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- true), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
};
/* Map BFD reloc types to M68HC11 ELF reloc types. */
unsigned char elf_reloc_val;
};
-static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
+static const struct m68hc11_reloc_map m68hc11_reloc_map[] =
+{
{BFD_RELOC_NONE, R_M68HC11_NONE,},
{BFD_RELOC_8, R_M68HC11_8},
{BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
{BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP},
{BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP},
+
+ {BFD_RELOC_M68HC12_16B, R_M68HC12_16B},
+
+ {BFD_RELOC_M68HC12_9_PCREL, R_M68HC12_PCREL_9},
+ {BFD_RELOC_M68HC12_10_PCREL, R_M68HC12_PCREL_10},
+ {BFD_RELOC_M68HC12_HI8XG, R_M68HC12_HI8XG},
+ {BFD_RELOC_M68HC12_LO8XG, R_M68HC12_LO8XG},
};
static reloc_howto_type *
-bfd_elf32_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd ATTRIBUTE_UNUSED;
- bfd_reloc_code_real_type code;
+bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
unsigned int i;
return NULL;
}
-/* This function is used for relocs which are only used for relaxing,
- which the linker should otherwise ignore. */
-
-static bfd_reloc_status_type
-m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section,
- output_bfd, error_message)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *reloc_entry;
- asymbol *symbol ATTRIBUTE_UNUSED;
- PTR 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 int
-m68hc12_addr_is_banked (addr)
- bfd_vma addr;
-{
- return (addr >= M68HC12_BANK_VIRT) ? 1 : 0;
-}
-
-/* Return the physical address seen by the processor, taking
- into account banked memory. */
-static bfd_vma
-m68hc12_phys_addr (addr)
- bfd_vma addr;
-{
- if (addr < M68HC12_BANK_VIRT)
- return addr;
-
- /* Map the address to the memory bank. */
- addr -= M68HC12_BANK_VIRT;
- addr &= M68HC12_BANK_MASK;
- addr += M68HC12_BANK_BASE;
- return addr;
-}
-
-/* Return the page number corresponding to an address in banked memory. */
-static bfd_vma
-m68hc12_phys_page (addr)
- bfd_vma addr;
-{
- if (addr < M68HC12_BANK_VIRT)
- return 0;
-
- /* Map the address to the memory bank. */
- addr -= M68HC12_BANK_VIRT;
- addr >>= M68HC12_BANK_SHIFT;
- addr &= M68HC12_BANK_PAGE_MASK;
- return addr;
-}
-
-static bfd_reloc_status_type
-m68hc12_elf_special_reloc (abfd, reloc_entry, symbol, data, input_section,
- output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message ATTRIBUTE_UNUSED;
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
{
- reloc_howto_type *howto;
- bfd_vma relocation;
- bfd_vma phys_addr;
- bfd_vma phys_page;
- bfd_vma insn_page;
- bfd_vma insn_addr;
-
- if (output_bfd != (bfd *) NULL
- && (symbol->flags & BSF_SECTION_SYM) == 0
- && (! reloc_entry->howto->partial_inplace
- || reloc_entry->addend == 0))
- {
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
- }
-
- if (output_bfd != NULL)
- return bfd_reloc_continue;
-
- if (reloc_entry->address > input_section->_cooked_size)
- return bfd_reloc_outofrange;
-
- /* Compute relocation. */
- relocation = (symbol->value
- + symbol->section->output_section->vma
- + symbol->section->output_offset);
- relocation += reloc_entry->addend;
- relocation += bfd_get_16 (abfd, (bfd_byte*) data + reloc_entry->address);
-
- /* Do the memory bank mapping. */
- phys_addr = m68hc12_phys_addr (relocation);
- phys_page = m68hc12_phys_page (relocation);
-
- howto = reloc_entry->howto;
- if (howto->complain_on_overflow != complain_overflow_dont
- && (phys_addr & (((bfd_vma) -1) << 16)))
- return bfd_reloc_overflow;
-
- switch (howto->type)
- {
- case R_M68HC11_16:
- /* Get virtual address of instruction having the relocation. */
- insn_addr = input_section->output_section->vma
- + input_section->output_offset
- + reloc_entry->address;
-
- insn_page = m68hc12_phys_page (insn_addr);
-
- if (m68hc12_addr_is_banked (relocation)
- && m68hc12_addr_is_banked (insn_addr)
- && phys_page != insn_page)
- {
- *error_message = _("address is not in the same bank");
- return bfd_reloc_dangerous;
- }
- if (m68hc12_addr_is_banked (relocation)
- && !m68hc12_addr_is_banked (insn_addr))
- {
- *error_message = _("reference to a banked address in "
- "the normal address space");
- return bfd_reloc_dangerous;
- }
-
- case R_M68HC11_LO16:
- bfd_put_16 (abfd, phys_addr, (bfd_byte*) data + reloc_entry->address);
- break;
-
- case R_M68HC11_24:
- bfd_put_16 (abfd, phys_addr, (bfd_byte*) data + reloc_entry->address);
- bfd_put_8 (abfd, phys_page, (bfd_byte*) data + reloc_entry->address + 2);
- break;
+ unsigned int i;
- case R_M68HC11_PAGE:
- bfd_put_8 (abfd, phys_page, (bfd_byte*) data + reloc_entry->address);
- break;
+ for (i = 0;
+ i < (sizeof (elf_m68hc11_howto_table)
+ / sizeof (elf_m68hc11_howto_table[0]));
+ i++)
+ if (elf_m68hc11_howto_table[i].name != NULL
+ && strcasecmp (elf_m68hc11_howto_table[i].name, r_name) == 0)
+ return &elf_m68hc11_howto_table[i];
- default:
- abort ();
- break;
- }
-
- return bfd_reloc_ok;
+ return NULL;
}
/* Set the howto pointer for an M68HC11 ELF reloc. */
-static void
-m68hc11_info_to_howto_rel (abfd, cache_ptr, dst)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *cache_ptr;
- Elf32_Internal_Rel *dst;
+static bfd_boolean
+m68hc11_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);
- BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max);
+ if (r_type >= (unsigned int) R_M68HC11_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_m68hc11_howto_table[r_type];
+ return TRUE;
}
\f
-/* Set and control ELF flags in ELF header. */
+/* Far trampoline generation. */
-boolean
-_bfd_m68hc12_elf_set_private_flags (abfd, flags)
- bfd *abfd;
- flagword flags;
+/* Build a 68HC12 trampoline stub. */
+static bfd_boolean
+m68hc12_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
{
- BFD_ASSERT (!elf_flags_init (abfd)
- || elf_elfheader (abfd)->e_flags == flags);
-
- elf_elfheader (abfd)->e_flags = flags;
- elf_flags_init (abfd) = true;
- return true;
+ struct elf32_m68hc11_stub_hash_entry *stub_entry;
+ struct bfd_link_info *info;
+ struct m68hc11_elf_link_hash_table *htab;
+ asection *stub_sec;
+ bfd *stub_bfd;
+ bfd_byte *loc;
+ bfd_vma sym_value, phys_page, phys_addr;
+
+ /* Massage our args to the form they really have. */
+ stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
+ info = (struct bfd_link_info *) in_arg;
+
+ /* Fail if the target section could not be assigned to an output
+ section. The user should fix his linker script. */
+ if (stub_entry->target_section->output_section == NULL
+ && info->non_contiguous_regions)
+ info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. "
+ "Retry without --enable-non-contiguous-regions.\n"),
+ stub_entry->target_section);
+
+ htab = m68hc11_elf_hash_table (info);
+
+ stub_sec = stub_entry->stub_sec;
+
+ /* Make a note of the offset within the stubs for this entry. */
+ stub_entry->stub_offset = stub_sec->size;
+ stub_sec->size += 7;
+ loc = stub_sec->contents + stub_entry->stub_offset;
+
+ stub_bfd = stub_sec->owner;
+
+ /* Create the trampoline call stub:
+
+ ldy #%addr(symbol)
+ call %page(symbol), __trampoline
+
+ */
+ sym_value = (stub_entry->target_value
+ + stub_entry->target_section->output_offset
+ + stub_entry->target_section->output_section->vma);
+ phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value);
+ phys_page = m68hc11_phys_page (&htab->pinfo, sym_value);
+
+ /* ldy #%page(sym) */
+ bfd_put_8 (stub_bfd, 0xCD, loc);
+ bfd_put_16 (stub_bfd, phys_addr, loc + 1);
+ loc += 3;
+
+ /* call %page(sym), __trampoline */
+ bfd_put_8 (stub_bfd, 0x4a, loc);
+ bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1);
+ bfd_put_8 (stub_bfd, phys_page, loc + 3);
+
+ return TRUE;
}
-/* Merge backend specific data from an object file to the output
- object file when linking. */
+/* As above, but don't actually build the stub. Just bump offset so
+ we know stub section sizes. */
-boolean
-_bfd_m68hc12_elf_merge_private_bfd_data (ibfd, obfd)
- bfd *ibfd;
- bfd *obfd;
+static bfd_boolean
+m68hc12_elf_size_one_stub (struct bfd_hash_entry *gen_entry,
+ void *in_arg ATTRIBUTE_UNUSED)
{
- flagword old_flags;
- flagword new_flags;
- boolean ok = true;
+ struct elf32_m68hc11_stub_hash_entry *stub_entry;
- /* Check if we have the same endianess */
- if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
- return false;
+ /* Massage our args to the form they really have. */
+ stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return true;
+ stub_entry->stub_sec->size += 7;
+ return TRUE;
+}
- new_flags = elf_elfheader (ibfd)->e_flags;
- elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI;
- old_flags = elf_elfheader (obfd)->e_flags;
+/* Create a 68HC12 ELF linker hash table. */
- if (! elf_flags_init (obfd))
- {
- elf_flags_init (obfd) = true;
- elf_elfheader (obfd)->e_flags = new_flags;
- elf_elfheader (obfd)->e_ident[EI_CLASS]
- = elf_elfheader (ibfd)->e_ident[EI_CLASS];
-
- if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
- && bfd_get_arch_info (obfd)->the_default)
- {
- if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
- bfd_get_mach (ibfd)))
- return false;
- }
-
- return true;
- }
+static struct bfd_link_hash_table *
+m68hc12_elf_bfd_link_hash_table_create (bfd *abfd)
+{
+ struct m68hc11_elf_link_hash_table *ret;
- /* Check ABI compatibility. */
- if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32))
- {
- (*_bfd_error_handler)
- (_("%s: linking files compiled for 16-bit integers (-mshort) "
- "and others for 32-bit integers"),
- bfd_archive_filename (ibfd));
- ok = false;
- }
- if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64))
- {
- (*_bfd_error_handler)
- (_("%s: linking files compiled for 32-bit double (-fshort-double) "
- "and others for 64-bit double"),
- bfd_archive_filename (ibfd));
- ok = false;
- }
- new_flags &= ~EF_M68HC11_ABI;
- old_flags &= ~EF_M68HC11_ABI;
+ ret = m68hc11_elf_hash_table_create (abfd);
+ if (ret == (struct m68hc11_elf_link_hash_table *) NULL)
+ return NULL;
- /* Warn about any other mismatches */
- if (new_flags != old_flags)
- {
- (*_bfd_error_handler)
- (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
- bfd_archive_filename (ibfd), (unsigned long) new_flags,
- (unsigned long) old_flags);
- ok = false;
- }
+ ret->size_one_stub = m68hc12_elf_size_one_stub;
+ ret->build_one_stub = m68hc12_elf_build_one_stub;
- if (! ok)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
-
- return true;
+ return &ret->root.root;
}
-
-boolean
-_bfd_m68hc12_elf_print_private_bfd_data (abfd, ptr)
- bfd *abfd;
- PTR ptr;
+\f
+static bfd_boolean
+m68hc12_elf_set_mach_from_flags (bfd *abfd)
{
- FILE *file = (FILE *) ptr;
-
- BFD_ASSERT (abfd != NULL && ptr != NULL);
+ flagword flags = elf_elfheader (abfd)->e_flags;
- /* 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_M68HC11_I32)
- fprintf (file, _("[abi=32-bit int,"));
- else
- fprintf (file, _("[abi=16-bit int,"));
-
- if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64)
- fprintf (file, _(" 64-bit double]"));
- else
- fprintf (file, _(" 32-bit double]"));
-
- fputc ('\n', file);
-
- return true;
+ switch (flags & EF_M68HC11_MACH_MASK)
+ {
+ case EF_M68HC12_MACH:
+ bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812);
+ break;
+ case EF_M68HCS12_MACH:
+ bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812s);
+ break;
+ case EF_M68HC11_GENERIC:
+ bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12,
+ bfd_mach_m6812_default);
+ break;
+ default:
+ return FALSE;
+ }
+ return TRUE;
}
-/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c.
- The Motorola spec says to use a different Elf machine code. */
+/* 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. */
+static const struct bfd_elf_special_section elf32_m68hc12_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 },
+ { NULL, 0, 0, 0, 0 }
+};
+\f
#define ELF_ARCH bfd_arch_m68hc12
+#define ELF_TARGET_ID M68HC11_ELF_DATA
#define ELF_MACHINE_CODE EM_68HC12
#define ELF_MAXPAGESIZE 0x1000
-#define TARGET_BIG_SYM bfd_elf32_m68hc12_vec
+#define TARGET_BIG_SYM m68hc12_elf32_vec
#define TARGET_BIG_NAME "elf32-m68hc12"
-#define elf_info_to_howto 0
+#define elf_info_to_howto NULL
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel
-#define elf_backend_object_p 0
-#define elf_backend_final_write_processing 0
-
+#define elf_backend_check_relocs elf32_m68hc11_check_relocs
+#define elf_backend_relocate_section elf32_m68hc11_relocate_section
+#define elf_backend_object_p m68hc12_elf_set_mach_from_flags
+#define elf_backend_can_gc_sections 1
+#define elf_backend_special_sections elf32_m68hc12_special_sections
+#define elf_backend_init_file_header elf32_m68hc11_init_file_header
+#define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook
+#define elf_backend_merge_symbol_attribute elf32_m68hc11_merge_symbol_attribute
+
+#define bfd_elf32_bfd_link_hash_table_create \
+ m68hc12_elf_bfd_link_hash_table_create
#define bfd_elf32_bfd_merge_private_bfd_data \
- _bfd_m68hc12_elf_merge_private_bfd_data
-#define bfd_elf32_bfd_set_private_flags _bfd_m68hc12_elf_set_private_flags
+ _bfd_m68hc11_elf_merge_private_bfd_data
+#define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags
#define bfd_elf32_bfd_print_private_bfd_data \
- _bfd_m68hc12_elf_print_private_bfd_data
+ _bfd_m68hc11_elf_print_private_bfd_data
#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / blobdiff