1 /* BFD back-end for ns32k a.out-ish binaries.
2 Copyright 1990, 1991, 1992, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
3 2002, 2003, 2005 Free Software Foundation, Inc.
4 Contributed by Ian Dall (idall@eleceng.adelaide.edu.au).
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23 #include "aout/aout64.h"
26 /* Do not "beautify" the CONCAT* macro args. Traditional C will not
27 remove whitespace added here, and thus will fail to concatenate
29 #define MYNS(OP) CONCAT2 (ns32kaout_,OP)
31 reloc_howto_type * MYNS (bfd_reloc_type_lookup) (bfd * abfd, bfd_reloc_code_real_type);
32 bfd_boolean MYNS (write_object_contents) (bfd *abfd);
34 /* Avoid multiple definitions from aoutx if supporting
35 standard a.out format(s) as well as this one. */
36 #define NAME(x,y) CONCAT3 (ns32kaout,_32_,y)
38 void bfd_ns32k_arch (void);
42 #define MY(OP) MYNS (OP)
44 #define MY_swap_std_reloc_in MY (swap_std_reloc_in)
45 #define MY_swap_std_reloc_out MY (swap_std_reloc_out)
47 /* The ns32k series is ah, unusual, when it comes to relocation.
48 There are three storage methods for relocatable objects. There
49 are displacements, immediate operands and ordinary twos complement
50 data. Of these, only the last fits into the standard relocation
51 scheme. Immediate operands are stored huffman encoded and
52 immediate operands are stored big endian (where as the natural byte
53 order is little endian for this architecture).
55 Note that the ns32k displacement storage method is orthogonal to
56 whether the relocation is pc relative or not. The "displacement"
57 storage scheme is used for essentially all address constants. The
58 displacement can be relative to zero (absolute displacement),
59 relative to the pc (pc relative), the stack pointer, the frame
60 pointer, the static base register and general purpose register etc.
64 sym1: .long . # pc relative 2's complement
65 sym1: .long foo # 2's complement not pc relative
67 self: movd @self, r0 # pc relative displacement
68 movd foo, r0 # non pc relative displacement
70 self: movd self, r0 # pc relative immediate
71 movd foo, r0 # non pc relative immediate
73 In addition, for historical reasons the encoding of the relocation types
74 in the a.out format relocation entries is such that even the relocation
75 methods which are standard are not encoded the standard way. */
77 reloc_howto_type MY (howto_table)[] =
79 /* ns32k immediate operands. */
80 HOWTO (BFD_RELOC_NS32K_IMM_8, 0, 0, 8, FALSE, 0, complain_overflow_signed,
81 _bfd_ns32k_reloc_imm, "NS32K_IMM_8",
82 TRUE, 0x000000ff,0x000000ff, FALSE),
83 HOWTO (BFD_RELOC_NS32K_IMM_16, 0, 1, 16, FALSE, 0, complain_overflow_signed,
84 _bfd_ns32k_reloc_imm, "NS32K_IMM_16",
85 TRUE, 0x0000ffff,0x0000ffff, FALSE),
86 HOWTO (BFD_RELOC_NS32K_IMM_32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
87 _bfd_ns32k_reloc_imm, "NS32K_IMM_32",
88 TRUE, 0xffffffff,0xffffffff, FALSE),
89 HOWTO (BFD_RELOC_NS32K_IMM_8_PCREL, 0, 0, 8, TRUE, 0, complain_overflow_signed,
90 _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_8",
91 TRUE, 0x000000ff, 0x000000ff, FALSE),
92 HOWTO (BFD_RELOC_NS32K_IMM_16_PCREL, 0, 1, 16, TRUE, 0, complain_overflow_signed,
93 _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_16",
94 TRUE, 0x0000ffff,0x0000ffff, FALSE),
95 HOWTO (BFD_RELOC_NS32K_IMM_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
96 _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_32",
97 TRUE, 0xffffffff,0xffffffff, FALSE),
99 /* ns32k displacements. */
100 HOWTO (BFD_RELOC_NS32K_DISP_8, 0, 0, 7, FALSE, 0, complain_overflow_signed,
101 _bfd_ns32k_reloc_disp, "NS32K_DISP_8",
102 TRUE, 0x000000ff,0x000000ff, FALSE),
103 HOWTO (BFD_RELOC_NS32K_DISP_16, 0, 1, 14, FALSE, 0, complain_overflow_signed,
104 _bfd_ns32k_reloc_disp, "NS32K_DISP_16",
105 TRUE, 0x0000ffff, 0x0000ffff, FALSE),
106 HOWTO (BFD_RELOC_NS32K_DISP_32, 0, 2, 30, FALSE, 0, complain_overflow_signed,
107 _bfd_ns32k_reloc_disp, "NS32K_DISP_32",
108 TRUE, 0xffffffff, 0xffffffff, FALSE),
109 HOWTO (BFD_RELOC_NS32K_DISP_8_PCREL, 0, 0, 7, TRUE, 0, complain_overflow_signed,
110 _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_8",
111 TRUE, 0x000000ff,0x000000ff, FALSE),
112 HOWTO (BFD_RELOC_NS32K_DISP_16_PCREL, 0, 1, 14, TRUE, 0, complain_overflow_signed,
113 _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_16",
114 TRUE, 0x0000ffff,0x0000ffff, FALSE),
115 HOWTO (BFD_RELOC_NS32K_DISP_32_PCREL, 0, 2, 30, TRUE, 0, complain_overflow_signed,
116 _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_32",
117 TRUE, 0xffffffff,0xffffffff, FALSE),
119 /* Normal 2's complement. */
120 HOWTO (BFD_RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,
121 "8", TRUE, 0x000000ff,0x000000ff, FALSE),
122 HOWTO (BFD_RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,
123 "16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
124 HOWTO (BFD_RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,
125 "32", TRUE, 0xffffffff,0xffffffff, FALSE),
126 HOWTO (BFD_RELOC_8_PCREL, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,
127 "PCREL_8", TRUE, 0x000000ff,0x000000ff, FALSE),
128 HOWTO (BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,
129 "PCREL_16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
130 HOWTO (BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,
131 "PCREL_32", TRUE, 0xffffffff,0xffffffff, FALSE),
134 #define CTOR_TABLE_RELOC_HOWTO(BFD) (MY (howto_table) + 14)
136 #define RELOC_STD_BITS_NS32K_TYPE_BIG 0x06
137 #define RELOC_STD_BITS_NS32K_TYPE_LITTLE 0x60
138 #define RELOC_STD_BITS_NS32K_TYPE_SH_BIG 1
139 #define RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE 5
141 static reloc_howto_type *
142 MY (reloc_howto) (bfd *abfd ATTRIBUTE_UNUSED,
143 struct reloc_std_external *rel,
148 unsigned int r_length;
151 *r_index = ((rel->r_index[2] << 16)
152 | (rel->r_index[1] << 8)
154 *r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
155 *r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
156 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
157 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
158 r_ns32k_type = ((rel->r_type[0] & RELOC_STD_BITS_NS32K_TYPE_LITTLE)
159 >> RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE);
160 return (MY (howto_table) + r_length + 3 * (*r_pcrel) + 6 * r_ns32k_type);
163 #define MY_reloc_howto(BFD, REL, IN, EX, PC) \
164 MY (reloc_howto) (BFD, REL, &IN, &EX, &PC)
167 MY (put_reloc) (bfd *abfd,
171 reloc_howto_type *howto,
172 struct reloc_std_external *reloc)
174 unsigned int r_length;
178 PUT_WORD (abfd, value, reloc->r_address);
179 r_length = howto->size ; /* Size as a power of two. */
180 r_pcrel = (int) howto->pc_relative; /* Relative to PC? */
181 r_ns32k_type = (howto - MY (howto_table) )/6;
183 reloc->r_index[2] = r_index >> 16;
184 reloc->r_index[1] = r_index >> 8;
185 reloc->r_index[0] = r_index;
187 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
188 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
189 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)
190 | (r_ns32k_type << RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE);
193 #define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \
194 MY (put_reloc) (BFD, EXT, IDX, VAL, HOWTO, RELOC)
196 #define STAT_FOR_EXEC
198 #define MY_final_link_relocate _bfd_ns32k_final_link_relocate
199 #define MY_relocate_contents _bfd_ns32k_relocate_contents
201 static void MY_swap_std_reloc_in (bfd *, struct reloc_std_external *, arelent *, asymbol **, bfd_size_type);
202 static void MY_swap_std_reloc_out (bfd *, arelent *, struct reloc_std_external *);
207 MY (bfd_reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
209 #define ENTRY(i,j) case i: return &MY (howto_table)[j]
211 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
213 BFD_ASSERT (ext == 0);
214 if (code == BFD_RELOC_CTOR)
215 switch (bfd_get_arch_info (abfd)->bits_per_address)
225 ENTRY (BFD_RELOC_NS32K_IMM_8, 0);
226 ENTRY (BFD_RELOC_NS32K_IMM_16, 1);
227 ENTRY (BFD_RELOC_NS32K_IMM_32, 2);
228 ENTRY (BFD_RELOC_NS32K_IMM_8_PCREL, 3);
229 ENTRY (BFD_RELOC_NS32K_IMM_16_PCREL, 4);
230 ENTRY (BFD_RELOC_NS32K_IMM_32_PCREL, 5);
231 ENTRY (BFD_RELOC_NS32K_DISP_8, 6);
232 ENTRY (BFD_RELOC_NS32K_DISP_16, 7);
233 ENTRY (BFD_RELOC_NS32K_DISP_32, 8);
234 ENTRY (BFD_RELOC_NS32K_DISP_8_PCREL, 9);
235 ENTRY (BFD_RELOC_NS32K_DISP_16_PCREL, 10);
236 ENTRY (BFD_RELOC_NS32K_DISP_32_PCREL, 11);
237 ENTRY (BFD_RELOC_8, 12);
238 ENTRY (BFD_RELOC_16, 13);
239 ENTRY (BFD_RELOC_32, 14);
240 ENTRY (BFD_RELOC_8_PCREL, 15);
241 ENTRY (BFD_RELOC_16_PCREL, 16);
242 ENTRY (BFD_RELOC_32_PCREL, 17);
250 MY_swap_std_reloc_in (bfd *abfd,
251 struct reloc_std_external *bytes,
254 bfd_size_type symcount ATTRIBUTE_UNUSED)
259 struct aoutdata *su = &(abfd->tdata.aout_data->a);
261 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
263 /* Now the fun stuff. */
264 cache_ptr->howto = MY_reloc_howto (abfd, bytes, r_index, r_extern, r_pcrel);
270 MY_swap_std_reloc_out (bfd *abfd,
272 struct reloc_std_external *natptr)
275 asymbol *sym = *(g->sym_ptr_ptr);
277 asection *output_section = sym->section->output_section;
279 /* Name was clobbered by aout_write_syms to be symbol index. */
281 /* If this relocation is relative to a symbol then set the
282 r_index to the symbols index, and the r_extern bit.
284 Absolute symbols can come in in two ways, either as an offset
285 from the abs section, or as a symbol which has an abs value.
286 Check for that here. */
287 if (bfd_is_com_section (output_section)
288 || output_section == &bfd_abs_section
289 || output_section == &bfd_und_section)
291 if (bfd_abs_section.symbol == sym)
293 /* Whoops, looked like an abs symbol, but is really an offset
294 from the abs section. */
300 /* Fill in symbol. */
303 #define KEEPIT udata.i
304 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
310 /* Just an ordinary section. */
312 r_index = output_section->target_index;
315 MY_put_reloc (abfd, r_extern, r_index, g->address, g->howto, natptr);
318 bfd_reloc_status_type
319 _bfd_ns32k_relocate_contents (reloc_howto_type *howto,
324 int r_ns32k_type = (howto - MY (howto_table)) / 6;
325 bfd_vma (*get_data) (bfd_byte *, int);
326 void (*put_data) (bfd_vma, bfd_byte *, int);
328 switch (r_ns32k_type)
331 get_data = _bfd_ns32k_get_immediate;
332 put_data = _bfd_ns32k_put_immediate;
335 get_data = _bfd_ns32k_get_displacement;
336 put_data = _bfd_ns32k_put_displacement;
339 return _bfd_relocate_contents (howto, input_bfd, relocation,
342 return bfd_reloc_notsupported;
344 return _bfd_do_ns32k_reloc_contents (howto, input_bfd, relocation,
345 location, get_data, put_data);