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, 2006, 2007, 2010, 2012 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 3 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,
21 MA 02110-1301, USA. */
25 #include "aout/aout64.h"
28 /* Do not "beautify" the CONCAT* macro args. Traditional C will not
29 remove whitespace added here, and thus will fail to concatenate
31 #define MYNS(OP) CONCAT2 (ns32kaout_,OP)
33 reloc_howto_type * MYNS (bfd_reloc_type_lookup) (bfd *, bfd_reloc_code_real_type);
34 reloc_howto_type * MYNS (bfd_reloc_name_lookup) (bfd *, const char *);
35 bfd_boolean MYNS (write_object_contents) (bfd *);
37 /* Avoid multiple definitions from aoutx if supporting
38 standard a.out format(s) as well as this one. */
39 #define NAME(x,y) CONCAT3 (ns32kaout,_32_,y)
41 void bfd_ns32k_arch (void);
45 #define MY(OP) MYNS (OP)
47 #define MY_swap_std_reloc_in MY (swap_std_reloc_in)
48 #define MY_swap_std_reloc_out MY (swap_std_reloc_out)
50 /* The ns32k series is ah, unusual, when it comes to relocation.
51 There are three storage methods for relocatable objects. There
52 are displacements, immediate operands and ordinary twos complement
53 data. Of these, only the last fits into the standard relocation
54 scheme. Immediate operands are stored huffman encoded and
55 immediate operands are stored big endian (where as the natural byte
56 order is little endian for this architecture).
58 Note that the ns32k displacement storage method is orthogonal to
59 whether the relocation is pc relative or not. The "displacement"
60 storage scheme is used for essentially all address constants. The
61 displacement can be relative to zero (absolute displacement),
62 relative to the pc (pc relative), the stack pointer, the frame
63 pointer, the static base register and general purpose register etc.
67 sym1: .long . # pc relative 2's complement
68 sym1: .long foo # 2's complement not pc relative
70 self: movd @self, r0 # pc relative displacement
71 movd foo, r0 # non pc relative displacement
73 self: movd self, r0 # pc relative immediate
74 movd foo, r0 # non pc relative immediate
76 In addition, for historical reasons the encoding of the relocation types
77 in the a.out format relocation entries is such that even the relocation
78 methods which are standard are not encoded the standard way. */
80 reloc_howto_type MY (howto_table)[] =
82 /* ns32k immediate operands. */
83 HOWTO (BFD_RELOC_NS32K_IMM_8, 0, 0, 8, FALSE, 0, complain_overflow_signed,
84 _bfd_ns32k_reloc_imm, "NS32K_IMM_8",
85 TRUE, 0x000000ff,0x000000ff, FALSE),
86 HOWTO (BFD_RELOC_NS32K_IMM_16, 0, 1, 16, FALSE, 0, complain_overflow_signed,
87 _bfd_ns32k_reloc_imm, "NS32K_IMM_16",
88 TRUE, 0x0000ffff,0x0000ffff, FALSE),
89 HOWTO (BFD_RELOC_NS32K_IMM_32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
90 _bfd_ns32k_reloc_imm, "NS32K_IMM_32",
91 TRUE, 0xffffffff,0xffffffff, FALSE),
92 HOWTO (BFD_RELOC_NS32K_IMM_8_PCREL, 0, 0, 8, TRUE, 0, complain_overflow_signed,
93 _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_8",
94 TRUE, 0x000000ff, 0x000000ff, FALSE),
95 HOWTO (BFD_RELOC_NS32K_IMM_16_PCREL, 0, 1, 16, TRUE, 0, complain_overflow_signed,
96 _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_16",
97 TRUE, 0x0000ffff,0x0000ffff, FALSE),
98 HOWTO (BFD_RELOC_NS32K_IMM_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
99 _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_32",
100 TRUE, 0xffffffff,0xffffffff, FALSE),
102 /* ns32k displacements. */
103 HOWTO (BFD_RELOC_NS32K_DISP_8, 0, 0, 7, FALSE, 0, complain_overflow_signed,
104 _bfd_ns32k_reloc_disp, "NS32K_DISP_8",
105 TRUE, 0x000000ff,0x000000ff, FALSE),
106 HOWTO (BFD_RELOC_NS32K_DISP_16, 0, 1, 14, FALSE, 0, complain_overflow_signed,
107 _bfd_ns32k_reloc_disp, "NS32K_DISP_16",
108 TRUE, 0x0000ffff, 0x0000ffff, FALSE),
109 HOWTO (BFD_RELOC_NS32K_DISP_32, 0, 2, 30, FALSE, 0, complain_overflow_signed,
110 _bfd_ns32k_reloc_disp, "NS32K_DISP_32",
111 TRUE, 0xffffffff, 0xffffffff, FALSE),
112 HOWTO (BFD_RELOC_NS32K_DISP_8_PCREL, 0, 0, 7, TRUE, 0, complain_overflow_signed,
113 _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_8",
114 TRUE, 0x000000ff,0x000000ff, FALSE),
115 HOWTO (BFD_RELOC_NS32K_DISP_16_PCREL, 0, 1, 14, TRUE, 0, complain_overflow_signed,
116 _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_16",
117 TRUE, 0x0000ffff,0x0000ffff, FALSE),
118 HOWTO (BFD_RELOC_NS32K_DISP_32_PCREL, 0, 2, 30, TRUE, 0, complain_overflow_signed,
119 _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_32",
120 TRUE, 0xffffffff,0xffffffff, FALSE),
122 /* Normal 2's complement. */
123 HOWTO (BFD_RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0,
124 "8", TRUE, 0x000000ff,0x000000ff, FALSE),
125 HOWTO (BFD_RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0,
126 "16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
127 HOWTO (BFD_RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0,
128 "32", TRUE, 0xffffffff,0xffffffff, FALSE),
129 HOWTO (BFD_RELOC_8_PCREL, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,
130 "PCREL_8", TRUE, 0x000000ff,0x000000ff, FALSE),
131 HOWTO (BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0,
132 "PCREL_16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
133 HOWTO (BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0,
134 "PCREL_32", TRUE, 0xffffffff,0xffffffff, FALSE),
137 #define CTOR_TABLE_RELOC_HOWTO(BFD) (MY (howto_table) + 14)
139 #define RELOC_STD_BITS_NS32K_TYPE_BIG 0x06
140 #define RELOC_STD_BITS_NS32K_TYPE_LITTLE 0x60
141 #define RELOC_STD_BITS_NS32K_TYPE_SH_BIG 1
142 #define RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE 5
144 static reloc_howto_type *
145 MY (reloc_howto) (bfd *abfd ATTRIBUTE_UNUSED,
146 struct reloc_std_external *rel,
151 unsigned int r_length;
154 *r_index = ((rel->r_index[2] << 16)
155 | (rel->r_index[1] << 8)
157 *r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
158 *r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
159 r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
160 >> RELOC_STD_BITS_LENGTH_SH_LITTLE);
161 r_ns32k_type = ((rel->r_type[0] & RELOC_STD_BITS_NS32K_TYPE_LITTLE)
162 >> RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE);
163 return (MY (howto_table) + r_length + 3 * (*r_pcrel) + 6 * r_ns32k_type);
166 #define MY_reloc_howto(BFD, REL, IN, EX, PC) \
167 MY (reloc_howto) (BFD, REL, &IN, &EX, &PC)
170 MY (put_reloc) (bfd *abfd,
174 reloc_howto_type *howto,
175 struct reloc_std_external *reloc)
177 unsigned int r_length;
181 PUT_WORD (abfd, value, reloc->r_address);
182 r_length = howto->size ; /* Size as a power of two. */
183 r_pcrel = (int) howto->pc_relative; /* Relative to PC? */
184 r_ns32k_type = (howto - MY (howto_table) )/6;
186 reloc->r_index[2] = r_index >> 16;
187 reloc->r_index[1] = r_index >> 8;
188 reloc->r_index[0] = r_index;
190 (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
191 | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
192 | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE)
193 | (r_ns32k_type << RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE);
196 #define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \
197 MY (put_reloc) (BFD, EXT, IDX, VAL, HOWTO, RELOC)
199 #define STAT_FOR_EXEC
201 #define MY_final_link_relocate _bfd_ns32k_final_link_relocate
202 #define MY_relocate_contents _bfd_ns32k_relocate_contents
204 static void MY_swap_std_reloc_in (bfd *, struct reloc_std_external *, arelent *, asymbol **, bfd_size_type);
205 static void MY_swap_std_reloc_out (bfd *, arelent *, struct reloc_std_external *);
210 MY (bfd_reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code)
212 #define ENTRY(i,j) case i: return &MY (howto_table)[j]
214 int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
216 BFD_ASSERT (ext == 0);
217 if (code == BFD_RELOC_CTOR)
218 switch (bfd_arch_bits_per_address (abfd))
228 ENTRY (BFD_RELOC_NS32K_IMM_8, 0);
229 ENTRY (BFD_RELOC_NS32K_IMM_16, 1);
230 ENTRY (BFD_RELOC_NS32K_IMM_32, 2);
231 ENTRY (BFD_RELOC_NS32K_IMM_8_PCREL, 3);
232 ENTRY (BFD_RELOC_NS32K_IMM_16_PCREL, 4);
233 ENTRY (BFD_RELOC_NS32K_IMM_32_PCREL, 5);
234 ENTRY (BFD_RELOC_NS32K_DISP_8, 6);
235 ENTRY (BFD_RELOC_NS32K_DISP_16, 7);
236 ENTRY (BFD_RELOC_NS32K_DISP_32, 8);
237 ENTRY (BFD_RELOC_NS32K_DISP_8_PCREL, 9);
238 ENTRY (BFD_RELOC_NS32K_DISP_16_PCREL, 10);
239 ENTRY (BFD_RELOC_NS32K_DISP_32_PCREL, 11);
240 ENTRY (BFD_RELOC_8, 12);
241 ENTRY (BFD_RELOC_16, 13);
242 ENTRY (BFD_RELOC_32, 14);
243 ENTRY (BFD_RELOC_8_PCREL, 15);
244 ENTRY (BFD_RELOC_16_PCREL, 16);
245 ENTRY (BFD_RELOC_32_PCREL, 17);
253 MY (bfd_reloc_name_lookup) (bfd *abfd ATTRIBUTE_UNUSED,
259 i < sizeof (MY (howto_table)) / sizeof (MY (howto_table)[0]);
261 if (MY (howto_table)[i].name != NULL
262 && strcasecmp (MY (howto_table)[i].name, r_name) == 0)
263 return &MY (howto_table)[i];
269 MY_swap_std_reloc_in (bfd *abfd,
270 struct reloc_std_external *bytes,
273 bfd_size_type symcount ATTRIBUTE_UNUSED)
278 struct aoutdata *su = &(abfd->tdata.aout_data->a);
280 cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
282 /* Now the fun stuff. */
283 cache_ptr->howto = MY_reloc_howto (abfd, bytes, r_index, r_extern, r_pcrel);
289 MY_swap_std_reloc_out (bfd *abfd,
291 struct reloc_std_external *natptr)
294 asymbol *sym = *(g->sym_ptr_ptr);
296 asection *output_section = sym->section->output_section;
298 /* Name was clobbered by aout_write_syms to be symbol index. */
300 /* If this relocation is relative to a symbol then set the
301 r_index to the symbols index, and the r_extern bit.
303 Absolute symbols can come in in two ways, either as an offset
304 from the abs section, or as a symbol which has an abs value.
305 Check for that here. */
306 if (bfd_is_com_section (output_section)
307 || bfd_is_abs_section (output_section)
308 || bfd_is_und_section (output_section))
310 if (bfd_abs_section_ptr->symbol == sym)
312 /* Whoops, looked like an abs symbol, but is really an offset
313 from the abs section. */
319 /* Fill in symbol. */
322 #define KEEPIT udata.i
323 r_index = (*(g->sym_ptr_ptr))->KEEPIT;
329 /* Just an ordinary section. */
331 r_index = output_section->target_index;
334 MY_put_reloc (abfd, r_extern, r_index, g->address, g->howto, natptr);
337 bfd_reloc_status_type
338 _bfd_ns32k_relocate_contents (reloc_howto_type *howto,
343 int r_ns32k_type = (howto - MY (howto_table)) / 6;
344 bfd_vma (*get_data) (bfd_byte *, int);
345 void (*put_data) (bfd_vma, bfd_byte *, int);
347 switch (r_ns32k_type)
350 get_data = _bfd_ns32k_get_immediate;
351 put_data = _bfd_ns32k_put_immediate;
354 get_data = _bfd_ns32k_get_displacement;
355 put_data = _bfd_ns32k_put_displacement;
358 return _bfd_relocate_contents (howto, input_bfd, relocation,
361 return bfd_reloc_notsupported;
363 return _bfd_do_ns32k_reloc_contents (howto, input_bfd, relocation,
364 location, get_data, put_data);