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/* Motorola 68HC12-specific support for 32-bit ELF |
/* Motorola 68HC12-specific support for 32-bit ELF |
2 |
Copyright 1999, 2000 Free Software Foundation, Inc. |
Copyright 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc. |
3 |
Contributed by Stephane Carrez (stcarrez@worldnet.fr) |
Contributed by Stephane Carrez (stcarrez@nerim.fr) |
4 |
(Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com)) |
(Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com)) |
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This file is part of BFD, the Binary File Descriptor library. |
This file is part of BFD, the Binary File Descriptor library. |
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#include "bfd.h" |
#include "bfd.h" |
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#include "sysdep.h" |
#include "sysdep.h" |
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#include "bfdlink.h" |
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#include "libbfd.h" |
#include "libbfd.h" |
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#include "elf-bfd.h" |
#include "elf-bfd.h" |
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#include "elf32-m68hc1x.h" |
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#include "elf/m68hc11.h" |
#include "elf/m68hc11.h" |
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#include "opcode/m68hc11.h" |
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/* Relocation functions. */ |
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
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PARAMS ((bfd * abfd, bfd_reloc_code_real_type code)); |
(bfd *, bfd_reloc_code_real_type); |
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static void m68hc11_info_to_howto_rel |
static void m68hc11_info_to_howto_rel |
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); |
(bfd *, arelent *, Elf_Internal_Rela *); |
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/* Trampoline generation. */ |
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static bfd_boolean m68hc12_elf_size_one_stub |
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(struct bfd_hash_entry *gen_entry, void *in_arg); |
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static bfd_boolean m68hc12_elf_build_one_stub |
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(struct bfd_hash_entry *gen_entry, void *in_arg); |
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static struct bfd_link_hash_table* m68hc12_elf_bfd_link_hash_table_create |
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(bfd*); |
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static bfd_boolean m68hc12_elf_set_mach_from_flags PARAMS ((bfd *)); |
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/* Use REL instead of RELA to save space */ |
/* Use REL instead of RELA to save space */ |
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#define USE_REL |
#define USE_REL 1 |
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/* The 68HC12 microcontroler has a memory bank switching system |
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with a 16Kb window in the 64Kb address space. The extended memory |
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is mapped in the 16Kb window (at 0x8000). The page register controls |
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which 16Kb bank is mapped. The call/rtc instructions take care of |
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bank switching in function calls/returns. |
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For GNU Binutils to work, we consider there is a physical memory |
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at 0..0x0ffff and a kind of virtual memory above that. Symbols |
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in virtual memory have their addresses treated in a special way |
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when disassembling and when linking. |
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For the linker to work properly, we must always relocate the virtual |
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memory as if it is mapped at 0x8000. When a 16-bit relocation is |
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made in the virtual memory, we check that it does not cross the |
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memory bank where it is used. This would involve a page change |
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which would be wrong. The 24-bit relocation is for that and it |
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treats the address as a physical address + page number. |
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Banked |
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Address Space |
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| | Page n |
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+---------------+ 0x1010000 |
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| | |
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| jsr _foo | |
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| .. | Page 3 |
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| _foo: | |
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+---------------+ 0x100C000 |
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| | |
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| call _bar | |
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| .. | Page 2 |
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| _bar: | |
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+---------------+ 0x1008000 |
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/------>| | |
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| | call _foo | Page 1 |
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| | | |
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| +---------------+ 0x1004000 |
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Physical | | | |
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Address Space | | | Page 0 |
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| | | |
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+-----------+ 0x00FFFF | +---------------+ 0x1000000 |
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| | | |
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| call _foo | | |
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+-----------+ 0x00BFFF -+---/ |
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| | | |
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| | | |
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| | 16K | |
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+-----------+ 0x008000 -+ |
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= = |
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+-----------+ 0000 |
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The 'call _foo' must be relocated with page 3 and 16-bit address |
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mapped at 0x8000. |
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/* The Motorola 68HC11 microcontroler only addresses 64Kb. |
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We must handle 8 and 16-bit relocations. The 32-bit relocation |
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is defined but not used except by gas when -gstabs is used (which |
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is wrong). |
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The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */ |
The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */ |
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static reloc_howto_type elf_m68hc11_howto_table[] = { |
static reloc_howto_type elf_m68hc11_howto_table[] = { |
113 |
/* This reloc does nothing. */ |
/* This reloc does nothing. */ |
115 |
0, /* rightshift */ |
0, /* rightshift */ |
116 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
117 |
32, /* bitsize */ |
32, /* bitsize */ |
118 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
119 |
0, /* bitpos */ |
0, /* bitpos */ |
120 |
complain_overflow_bitfield, /* complain_on_overflow */ |
complain_overflow_dont,/* complain_on_overflow */ |
121 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
122 |
"R_M68HC11_NONE", /* name */ |
"R_M68HC12_NONE", /* name */ |
123 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
124 |
0, /* src_mask */ |
0, /* src_mask */ |
125 |
0, /* dst_mask */ |
0, /* dst_mask */ |
126 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
127 |
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128 |
/* A 8 bit absolute relocation */ |
/* A 8 bit absolute relocation */ |
129 |
HOWTO (R_M68HC11_8, /* type */ |
HOWTO (R_M68HC11_8, /* type */ |
130 |
0, /* rightshift */ |
0, /* rightshift */ |
131 |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
132 |
8, /* bitsize */ |
8, /* bitsize */ |
133 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
134 |
0, /* bitpos */ |
0, /* bitpos */ |
135 |
complain_overflow_bitfield, /* complain_on_overflow */ |
complain_overflow_bitfield, /* complain_on_overflow */ |
136 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
137 |
"R_M68HC11_8", /* name */ |
"R_M68HC12_8", /* name */ |
138 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
139 |
0x00ff, /* src_mask */ |
0x00ff, /* src_mask */ |
140 |
0x00ff, /* dst_mask */ |
0x00ff, /* dst_mask */ |
141 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
142 |
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|
143 |
/* A 8 bit absolute relocation (upper address) */ |
/* A 8 bit absolute relocation (upper address) */ |
144 |
HOWTO (R_M68HC11_HI8, /* type */ |
HOWTO (R_M68HC11_HI8, /* type */ |
145 |
8, /* rightshift */ |
8, /* rightshift */ |
146 |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
147 |
8, /* bitsize */ |
8, /* bitsize */ |
148 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
149 |
0, /* bitpos */ |
0, /* bitpos */ |
150 |
complain_overflow_bitfield, /* complain_on_overflow */ |
complain_overflow_bitfield, /* complain_on_overflow */ |
151 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
152 |
"R_M68HC11_HI8", /* name */ |
"R_M68HC12_HI8", /* name */ |
153 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
154 |
0x00ff, /* src_mask */ |
0x00ff, /* src_mask */ |
155 |
0x00ff, /* dst_mask */ |
0x00ff, /* dst_mask */ |
156 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
157 |
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|
158 |
/* A 8 bit absolute relocation (upper address) */ |
/* A 8 bit absolute relocation (upper address) */ |
159 |
HOWTO (R_M68HC11_LO8, /* type */ |
HOWTO (R_M68HC11_LO8, /* type */ |
160 |
0, /* rightshift */ |
0, /* rightshift */ |
161 |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
162 |
8, /* bitsize */ |
8, /* bitsize */ |
163 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
164 |
0, /* bitpos */ |
0, /* bitpos */ |
165 |
complain_overflow_dont, /* complain_on_overflow */ |
complain_overflow_dont, /* complain_on_overflow */ |
166 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
167 |
"R_M68HC11_LO8", /* name */ |
"R_M68HC12_LO8", /* name */ |
168 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
169 |
0x00ff, /* src_mask */ |
0x00ff, /* src_mask */ |
170 |
0x00ff, /* dst_mask */ |
0x00ff, /* dst_mask */ |
171 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
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|
173 |
/* A 8 bit PC-rel relocation */ |
/* A 8 bit PC-rel relocation */ |
174 |
HOWTO (R_M68HC11_PCREL_8, /* type */ |
HOWTO (R_M68HC11_PCREL_8, /* type */ |
175 |
0, /* rightshift */ |
0, /* rightshift */ |
176 |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
177 |
8, /* bitsize */ |
8, /* bitsize */ |
178 |
true, /* pc_relative */ |
TRUE, /* pc_relative */ |
179 |
0, /* bitpos */ |
0, /* bitpos */ |
180 |
complain_overflow_bitfield, /* complain_on_overflow */ |
complain_overflow_bitfield, /* complain_on_overflow */ |
181 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
182 |
"R_M68HC11_PCREL_8", /* name */ |
"R_M68HC12_PCREL_8", /* name */ |
183 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
184 |
0x0, /* src_mask */ |
0x00ff, /* src_mask */ |
185 |
0x00ff, /* dst_mask */ |
0x00ff, /* dst_mask */ |
186 |
false), /* pcrel_offset */ |
TRUE), /* pcrel_offset */ |
187 |
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/* A 16 bit absolute relocation */ |
/* A 16 bit absolute relocation */ |
189 |
HOWTO (R_M68HC11_16, /* type */ |
HOWTO (R_M68HC11_16, /* type */ |
190 |
0, /* rightshift */ |
0, /* rightshift */ |
191 |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
192 |
16, /* bitsize */ |
16, /* bitsize */ |
193 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
194 |
0, /* bitpos */ |
0, /* bitpos */ |
195 |
complain_overflow_dont /*bitfield */ , /* complain_on_overflow */ |
complain_overflow_dont /*bitfield */ , /* complain_on_overflow */ |
196 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
197 |
"R_M68HC11_16", /* name */ |
"R_M68HC12_16", /* name */ |
198 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
199 |
0xffff, /* src_mask */ |
0xffff, /* src_mask */ |
200 |
0xffff, /* dst_mask */ |
0xffff, /* dst_mask */ |
201 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
202 |
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/* A 32 bit absolute relocation. This one is never used for the |
/* A 32 bit absolute relocation. This one is never used for the |
204 |
code relocation. It's used by gas for -gstabs generation. */ |
code relocation. It's used by gas for -gstabs generation. */ |
206 |
0, /* rightshift */ |
0, /* rightshift */ |
207 |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
2, /* size (0 = byte, 1 = short, 2 = long) */ |
208 |
32, /* bitsize */ |
32, /* bitsize */ |
209 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
210 |
0, /* bitpos */ |
0, /* bitpos */ |
211 |
complain_overflow_bitfield, /* complain_on_overflow */ |
complain_overflow_bitfield, /* complain_on_overflow */ |
212 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
213 |
"R_M68HC11_32", /* name */ |
"R_M68HC12_32", /* name */ |
214 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
215 |
0xffffffff, /* src_mask */ |
0xffffffff, /* src_mask */ |
216 |
0xffffffff, /* dst_mask */ |
0xffffffff, /* dst_mask */ |
217 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
218 |
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219 |
/* A 3 bit absolute relocation */ |
/* A 3 bit absolute relocation */ |
220 |
HOWTO (R_M68HC11_3B, /* type */ |
HOWTO (R_M68HC11_3B, /* type */ |
221 |
0, /* rightshift */ |
0, /* rightshift */ |
222 |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
0, /* size (0 = byte, 1 = short, 2 = long) */ |
223 |
3, /* bitsize */ |
3, /* bitsize */ |
224 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
225 |
0, /* bitpos */ |
0, /* bitpos */ |
226 |
complain_overflow_bitfield, /* complain_on_overflow */ |
complain_overflow_bitfield, /* complain_on_overflow */ |
227 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
228 |
"R_M68HC11_4B", /* name */ |
"R_M68HC12_4B", /* name */ |
229 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
230 |
0x003, /* src_mask */ |
0x003, /* src_mask */ |
231 |
0x003, /* dst_mask */ |
0x003, /* dst_mask */ |
232 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
233 |
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234 |
/* A 16 bit PC-rel relocation */ |
/* A 16 bit PC-rel relocation */ |
235 |
HOWTO (R_M68HC11_PCREL_16, /* type */ |
HOWTO (R_M68HC11_PCREL_16, /* type */ |
236 |
0, /* rightshift */ |
0, /* rightshift */ |
237 |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
238 |
16, /* bitsize */ |
16, /* bitsize */ |
239 |
true, /* pc_relative */ |
TRUE, /* pc_relative */ |
240 |
0, /* bitpos */ |
0, /* bitpos */ |
241 |
complain_overflow_dont, /* complain_on_overflow */ |
complain_overflow_dont, /* complain_on_overflow */ |
242 |
bfd_elf_generic_reloc, /* special_function */ |
bfd_elf_generic_reloc, /* special_function */ |
243 |
"R_M68HC11_PCREL_16", /* name */ |
"R_M68HC12_PCREL_16", /* name */ |
244 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
245 |
0x0, /* src_mask */ |
0xffff, /* src_mask */ |
246 |
0xffff, /* dst_mask */ |
0xffff, /* dst_mask */ |
247 |
false), /* pcrel_offset */ |
TRUE), /* pcrel_offset */ |
248 |
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|
249 |
/* GNU extension to record C++ vtable hierarchy */ |
/* GNU extension to record C++ vtable hierarchy */ |
250 |
HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */ |
HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */ |
251 |
0, /* rightshift */ |
0, /* rightshift */ |
252 |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
253 |
0, /* bitsize */ |
0, /* bitsize */ |
254 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
255 |
0, /* bitpos */ |
0, /* bitpos */ |
256 |
complain_overflow_dont, /* complain_on_overflow */ |
complain_overflow_dont, /* complain_on_overflow */ |
257 |
NULL, /* special_function */ |
NULL, /* special_function */ |
258 |
"R_M68HC11_GNU_VTINHERIT", /* name */ |
"R_M68HC11_GNU_VTINHERIT", /* name */ |
259 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
260 |
0, /* src_mask */ |
0, /* src_mask */ |
261 |
0, /* dst_mask */ |
0, /* dst_mask */ |
262 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
263 |
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|
264 |
/* GNU extension to record C++ vtable member usage */ |
/* GNU extension to record C++ vtable member usage */ |
265 |
HOWTO (R_M68HC11_GNU_VTENTRY, /* type */ |
HOWTO (R_M68HC11_GNU_VTENTRY, /* type */ |
266 |
0, /* rightshift */ |
0, /* rightshift */ |
267 |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
1, /* size (0 = byte, 1 = short, 2 = long) */ |
268 |
0, /* bitsize */ |
0, /* bitsize */ |
269 |
false, /* pc_relative */ |
FALSE, /* pc_relative */ |
270 |
0, /* bitpos */ |
0, /* bitpos */ |
271 |
complain_overflow_dont, /* complain_on_overflow */ |
complain_overflow_dont, /* complain_on_overflow */ |
272 |
_bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
_bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
273 |
"R_M68HC11_GNU_VTENTRY", /* name */ |
"R_M68HC11_GNU_VTENTRY", /* name */ |
274 |
false, /* partial_inplace */ |
FALSE, /* partial_inplace */ |
275 |
0, /* src_mask */ |
0, /* src_mask */ |
276 |
0, /* dst_mask */ |
0, /* dst_mask */ |
277 |
false), /* pcrel_offset */ |
FALSE), /* pcrel_offset */ |
278 |
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279 |
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/* A 24 bit relocation */ |
280 |
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HOWTO (R_M68HC11_24, /* type */ |
281 |
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0, /* rightshift */ |
282 |
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2, /* size (0 = byte, 1 = short, 2 = long) */ |
283 |
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24, /* bitsize */ |
284 |
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FALSE, /* pc_relative */ |
285 |
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0, /* bitpos */ |
286 |
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complain_overflow_dont, /* complain_on_overflow */ |
287 |
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m68hc11_elf_special_reloc, /* special_function */ |
288 |
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"R_M68HC12_24", /* name */ |
289 |
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FALSE, /* partial_inplace */ |
290 |
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0xffffff, /* src_mask */ |
291 |
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0xffffff, /* dst_mask */ |
292 |
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FALSE), /* pcrel_offset */ |
293 |
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294 |
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/* A 16-bit low relocation */ |
295 |
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HOWTO (R_M68HC11_LO16, /* type */ |
296 |
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0, /* rightshift */ |
297 |
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1, /* size (0 = byte, 1 = short, 2 = long) */ |
298 |
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16, /* bitsize */ |
299 |
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FALSE, /* pc_relative */ |
300 |
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0, /* bitpos */ |
301 |
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complain_overflow_dont, /* complain_on_overflow */ |
302 |
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m68hc11_elf_special_reloc,/* special_function */ |
303 |
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"R_M68HC12_LO16", /* name */ |
304 |
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FALSE, /* partial_inplace */ |
305 |
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0xffff, /* src_mask */ |
306 |
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0xffff, /* dst_mask */ |
307 |
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FALSE), /* pcrel_offset */ |
308 |
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|
309 |
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/* A page relocation */ |
310 |
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HOWTO (R_M68HC11_PAGE, /* type */ |
311 |
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0, /* rightshift */ |
312 |
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0, /* size (0 = byte, 1 = short, 2 = long) */ |
313 |
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8, /* bitsize */ |
314 |
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FALSE, /* pc_relative */ |
315 |
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0, /* bitpos */ |
316 |
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complain_overflow_dont, /* complain_on_overflow */ |
317 |
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m68hc11_elf_special_reloc,/* special_function */ |
318 |
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"R_M68HC12_PAGE", /* name */ |
319 |
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FALSE, /* partial_inplace */ |
320 |
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0x00ff, /* src_mask */ |
321 |
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0x00ff, /* dst_mask */ |
322 |
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FALSE), /* pcrel_offset */ |
323 |
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324 |
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EMPTY_HOWTO (14), |
325 |
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EMPTY_HOWTO (15), |
326 |
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EMPTY_HOWTO (16), |
327 |
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EMPTY_HOWTO (17), |
328 |
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EMPTY_HOWTO (18), |
329 |
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EMPTY_HOWTO (19), |
330 |
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331 |
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/* Mark beginning of a jump instruction (any form). */ |
332 |
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HOWTO (R_M68HC11_RL_JUMP, /* type */ |
333 |
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0, /* rightshift */ |
334 |
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1, /* size (0 = byte, 1 = short, 2 = long) */ |
335 |
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0, /* bitsize */ |
336 |
|
FALSE, /* pc_relative */ |
337 |
|
0, /* bitpos */ |
338 |
|
complain_overflow_dont, /* complain_on_overflow */ |
339 |
|
m68hc11_elf_ignore_reloc, /* special_function */ |
340 |
|
"R_M68HC12_RL_JUMP", /* name */ |
341 |
|
TRUE, /* partial_inplace */ |
342 |
|
0, /* src_mask */ |
343 |
|
0, /* dst_mask */ |
344 |
|
TRUE), /* pcrel_offset */ |
345 |
|
|
346 |
|
/* Mark beginning of Gcc relaxation group instruction. */ |
347 |
|
HOWTO (R_M68HC11_RL_GROUP, /* type */ |
348 |
|
0, /* rightshift */ |
349 |
|
1, /* size (0 = byte, 1 = short, 2 = long) */ |
350 |
|
0, /* bitsize */ |
351 |
|
FALSE, /* pc_relative */ |
352 |
|
0, /* bitpos */ |
353 |
|
complain_overflow_dont, /* complain_on_overflow */ |
354 |
|
m68hc11_elf_ignore_reloc, /* special_function */ |
355 |
|
"R_M68HC12_RL_GROUP", /* name */ |
356 |
|
TRUE, /* partial_inplace */ |
357 |
|
0, /* src_mask */ |
358 |
|
0, /* dst_mask */ |
359 |
|
TRUE), /* pcrel_offset */ |
360 |
}; |
}; |
361 |
|
|
362 |
/* Map BFD reloc types to M68HC11 ELF reloc types. */ |
/* Map BFD reloc types to M68HC11 ELF reloc types. */ |
378 |
{BFD_RELOC_32, R_M68HC11_32}, |
{BFD_RELOC_32, R_M68HC11_32}, |
379 |
{BFD_RELOC_M68HC11_3B, R_M68HC11_3B}, |
{BFD_RELOC_M68HC11_3B, R_M68HC11_3B}, |
380 |
|
|
|
/* The following relocs are defined but they probably don't work yet. */ |
|
381 |
{BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT}, |
{BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT}, |
382 |
{BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY}, |
{BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY}, |
383 |
|
|
384 |
|
{BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16}, |
385 |
|
{BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE}, |
386 |
|
{BFD_RELOC_M68HC11_24, R_M68HC11_24}, |
387 |
|
|
388 |
|
{BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP}, |
389 |
|
{BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP}, |
390 |
}; |
}; |
391 |
|
|
392 |
static reloc_howto_type * |
static reloc_howto_type * |
393 |
bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
394 |
bfd *abfd ATTRIBUTE_UNUSED; |
bfd_reloc_code_real_type code) |
|
bfd_reloc_code_real_type code; |
|
395 |
{ |
{ |
396 |
unsigned int i; |
unsigned int i; |
397 |
|
|
409 |
/* Set the howto pointer for an M68HC11 ELF reloc. */ |
/* Set the howto pointer for an M68HC11 ELF reloc. */ |
410 |
|
|
411 |
static void |
static void |
412 |
m68hc11_info_to_howto_rel (abfd, cache_ptr, dst) |
m68hc11_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, |
413 |
bfd *abfd ATTRIBUTE_UNUSED; |
arelent *cache_ptr, Elf_Internal_Rela *dst) |
|
arelent *cache_ptr; |
|
|
Elf32_Internal_Rel *dst; |
|
414 |
{ |
{ |
415 |
unsigned int r_type; |
unsigned int r_type; |
416 |
|
|
419 |
cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; |
cache_ptr->howto = &elf_m68hc11_howto_table[r_type]; |
420 |
} |
} |
421 |
|
|
422 |
/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c. |
|
423 |
The Motorola spec says to use a different Elf machine code. */ |
/* Far trampoline generation. */ |
424 |
|
|
425 |
|
/* Build a 68HC12 trampoline stub. */ |
426 |
|
static bfd_boolean |
427 |
|
m68hc12_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
428 |
|
{ |
429 |
|
struct elf32_m68hc11_stub_hash_entry *stub_entry; |
430 |
|
struct bfd_link_info *info; |
431 |
|
struct m68hc11_elf_link_hash_table *htab; |
432 |
|
asection *stub_sec; |
433 |
|
bfd *stub_bfd; |
434 |
|
bfd_byte *loc; |
435 |
|
bfd_vma sym_value, phys_page, phys_addr; |
436 |
|
|
437 |
|
/* Massage our args to the form they really have. */ |
438 |
|
stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; |
439 |
|
info = (struct bfd_link_info *) in_arg; |
440 |
|
|
441 |
|
htab = m68hc11_elf_hash_table (info); |
442 |
|
|
443 |
|
stub_sec = stub_entry->stub_sec; |
444 |
|
|
445 |
|
/* Make a note of the offset within the stubs for this entry. */ |
446 |
|
stub_entry->stub_offset = stub_sec->size; |
447 |
|
stub_sec->size += 7; |
448 |
|
loc = stub_sec->contents + stub_entry->stub_offset; |
449 |
|
|
450 |
|
stub_bfd = stub_sec->owner; |
451 |
|
|
452 |
|
/* Create the trampoline call stub: |
453 |
|
|
454 |
|
ldy #%addr(symbol) |
455 |
|
call %page(symbol), __trampoline |
456 |
|
|
457 |
|
*/ |
458 |
|
sym_value = (stub_entry->target_value |
459 |
|
+ stub_entry->target_section->output_offset |
460 |
|
+ stub_entry->target_section->output_section->vma); |
461 |
|
phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value); |
462 |
|
phys_page = m68hc11_phys_page (&htab->pinfo, sym_value); |
463 |
|
|
464 |
|
/* ldy #%page(sym) */ |
465 |
|
bfd_put_8 (stub_bfd, 0xCD, loc); |
466 |
|
bfd_put_16 (stub_bfd, phys_addr, loc + 1); |
467 |
|
loc += 3; |
468 |
|
|
469 |
|
/* call %page(sym), __trampoline */ |
470 |
|
bfd_put_8 (stub_bfd, 0x4a, loc); |
471 |
|
bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1); |
472 |
|
bfd_put_8 (stub_bfd, phys_page, loc + 3); |
473 |
|
|
474 |
|
return TRUE; |
475 |
|
} |
476 |
|
|
477 |
|
/* As above, but don't actually build the stub. Just bump offset so |
478 |
|
we know stub section sizes. */ |
479 |
|
|
480 |
|
static bfd_boolean |
481 |
|
m68hc12_elf_size_one_stub (struct bfd_hash_entry *gen_entry, |
482 |
|
void *in_arg ATTRIBUTE_UNUSED) |
483 |
|
{ |
484 |
|
struct elf32_m68hc11_stub_hash_entry *stub_entry; |
485 |
|
|
486 |
|
/* Massage our args to the form they really have. */ |
487 |
|
stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry; |
488 |
|
|
489 |
|
stub_entry->stub_sec->size += 7; |
490 |
|
return TRUE; |
491 |
|
} |
492 |
|
|
493 |
|
/* Create a 68HC12 ELF linker hash table. */ |
494 |
|
|
495 |
|
static struct bfd_link_hash_table * |
496 |
|
m68hc12_elf_bfd_link_hash_table_create (bfd *abfd) |
497 |
|
{ |
498 |
|
struct m68hc11_elf_link_hash_table *ret; |
499 |
|
|
500 |
|
ret = m68hc11_elf_hash_table_create (abfd); |
501 |
|
if (ret == (struct m68hc11_elf_link_hash_table *) NULL) |
502 |
|
return NULL; |
503 |
|
|
504 |
|
ret->size_one_stub = m68hc12_elf_size_one_stub; |
505 |
|
ret->build_one_stub = m68hc12_elf_build_one_stub; |
506 |
|
|
507 |
|
return &ret->root.root; |
508 |
|
} |
509 |
|
|
510 |
|
static bfd_boolean |
511 |
|
m68hc12_elf_set_mach_from_flags (bfd *abfd) |
512 |
|
{ |
513 |
|
flagword flags = elf_elfheader (abfd)->e_flags; |
514 |
|
|
515 |
|
switch (flags & EF_M68HC11_MACH_MASK) |
516 |
|
{ |
517 |
|
case EF_M68HC12_MACH: |
518 |
|
bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812); |
519 |
|
break; |
520 |
|
case EF_M68HCS12_MACH: |
521 |
|
bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812s); |
522 |
|
break; |
523 |
|
case EF_M68HC11_GENERIC: |
524 |
|
bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, |
525 |
|
bfd_mach_m6812_default); |
526 |
|
break; |
527 |
|
default: |
528 |
|
return FALSE; |
529 |
|
} |
530 |
|
return TRUE; |
531 |
|
} |
532 |
|
|
533 |
|
/* Specific sections: |
534 |
|
- The .page0 is a data section that is mapped in [0x0000..0x00FF]. |
535 |
|
Page0 accesses are faster on the M68HC12. |
536 |
|
- The .vectors is the section that represents the interrupt |
537 |
|
vectors. */ |
538 |
|
static struct bfd_elf_special_section const elf32_m68hc12_special_sections[]= |
539 |
|
{ |
540 |
|
{ ".eeprom", 7, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
541 |
|
{ ".softregs", 9, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
542 |
|
{ ".page0", 6, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
543 |
|
{ ".vectors", 8, 0, SHT_PROGBITS, SHF_ALLOC }, |
544 |
|
{ NULL, 0, 0, 0, 0 } |
545 |
|
}; |
546 |
|
|
547 |
#define ELF_ARCH bfd_arch_m68hc12 |
#define ELF_ARCH bfd_arch_m68hc12 |
548 |
#define ELF_MACHINE_CODE EM_68HC12 |
#define ELF_MACHINE_CODE EM_68HC12 |
549 |
#define ELF_MAXPAGESIZE 0x1000 |
#define ELF_MAXPAGESIZE 0x1000 |
553 |
|
|
554 |
#define elf_info_to_howto 0 |
#define elf_info_to_howto 0 |
555 |
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel |
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel |
556 |
#define elf_backend_object_p 0 |
#define elf_backend_gc_mark_hook elf32_m68hc11_gc_mark_hook |
557 |
|
#define elf_backend_gc_sweep_hook elf32_m68hc11_gc_sweep_hook |
558 |
|
#define elf_backend_check_relocs elf32_m68hc11_check_relocs |
559 |
|
#define elf_backend_relocate_section elf32_m68hc11_relocate_section |
560 |
|
#define elf_backend_object_p m68hc12_elf_set_mach_from_flags |
561 |
#define elf_backend_final_write_processing 0 |
#define elf_backend_final_write_processing 0 |
562 |
|
#define elf_backend_can_gc_sections 1 |
563 |
|
#define elf_backend_special_sections elf32_m68hc12_special_sections |
564 |
|
#define elf_backend_post_process_headers elf32_m68hc11_post_process_headers |
565 |
|
#define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook |
566 |
|
|
567 |
|
#define bfd_elf32_bfd_link_hash_table_create \ |
568 |
|
m68hc12_elf_bfd_link_hash_table_create |
569 |
|
#define bfd_elf32_bfd_link_hash_table_free \ |
570 |
|
m68hc11_elf_bfd_link_hash_table_free |
571 |
|
#define bfd_elf32_bfd_merge_private_bfd_data \ |
572 |
|
_bfd_m68hc11_elf_merge_private_bfd_data |
573 |
|
#define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags |
574 |
|
#define bfd_elf32_bfd_print_private_bfd_data \ |
575 |
|
_bfd_m68hc11_elf_print_private_bfd_data |
576 |
|
|
577 |
#include "elf32-target.h" |
#include "elf32-target.h" |