1 /* BFD back-end for TMS320C30 coff binaries.
2    Copyright (C) 1998-2016 Free Software Foundation, Inc.
3    Contributed by Steven Haworth (steve@pm.cse.rmit.edu.au)
4 
5    This file is part of BFD, the Binary File Descriptor library.
6 
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 3 of the License, or
10    (at your option) any later version.
11 
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16 
17    You should have received a copy of the GNU General Public License
18    along with this program; if not, write to the Free Software
19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
20    02110-1301, USA.  */
21 
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "bfdlink.h"
26 #include "coff/tic30.h"
27 #include "coff/internal.h"
28 #include "libcoff.h"
29 
30 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
31 
32 reloc_howto_type tic30_coff_howto_table[] =
33   {
34     HOWTO (R_TIC30_ABS16, 2, 1, 16, FALSE, 0, 0, NULL,
35 	   "16", FALSE, 0x0000FFFF, 0x0000FFFF, FALSE),
36     HOWTO (R_TIC30_ABS24, 2, 2, 24, FALSE, 8, complain_overflow_bitfield, NULL,
37 	   "24", FALSE, 0xFFFFFF00, 0xFFFFFF00, FALSE),
38     HOWTO (R_TIC30_LDP, 18, 0, 24, FALSE, 0, complain_overflow_bitfield, NULL,
39 	   "LDP", FALSE, 0x00FF0000, 0x000000FF, FALSE),
40     HOWTO (R_TIC30_ABS32, 2, 2, 32, FALSE, 0, complain_overflow_bitfield, NULL,
41 	   "32", FALSE, 0xFFFFFFFF, 0xFFFFFFFF, FALSE),
42     HOWTO (R_TIC30_PC16, 2, 1, 16, TRUE, 0, complain_overflow_signed, NULL,
43 	   "PCREL", FALSE, 0x0000FFFF, 0x0000FFFF, FALSE),
44     EMPTY_HOWTO (-1)
45   };
46 
47 #ifndef coff_bfd_reloc_type_lookup
48 #define coff_bfd_reloc_type_lookup tic30_coff_reloc_type_lookup
49 #define coff_bfd_reloc_name_lookup tic30_coff_reloc_name_lookup
50 
51 /* For the case statement use the code values used in tc_gen_reloc to
52    map to the howto table entries that match those in both the aout
53    and coff implementations.  */
54 
55 static reloc_howto_type *
tic30_coff_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)56 tic30_coff_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
57 			      bfd_reloc_code_real_type code)
58 {
59   switch (code)
60     {
61     case BFD_RELOC_8:
62     case BFD_RELOC_TIC30_LDP:
63       return &tic30_coff_howto_table[2];
64     case BFD_RELOC_16:
65       return &tic30_coff_howto_table[0];
66     case BFD_RELOC_24:
67       return &tic30_coff_howto_table[1];
68     case BFD_RELOC_16_PCREL:
69       return &tic30_coff_howto_table[4];
70     case BFD_RELOC_32:
71       return &tic30_coff_howto_table[3];
72     default:
73       return (reloc_howto_type *) NULL;
74     }
75 }
76 
77 static reloc_howto_type *
tic30_coff_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)78 tic30_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
79 			      const char *r_name)
80 {
81   unsigned int i;
82 
83   for (i = 0;
84        i < (sizeof (tic30_coff_howto_table)
85 	    / sizeof (tic30_coff_howto_table[0]));
86        i++)
87     if (tic30_coff_howto_table[i].name != NULL
88 	&& strcasecmp (tic30_coff_howto_table[i].name, r_name) == 0)
89       return &tic30_coff_howto_table[i];
90 
91   return NULL;
92 }
93 
94 #endif
95 
96 /* Turn a howto into a reloc number.  */
97 
98 static int
coff_tic30_select_reloc(reloc_howto_type * howto)99 coff_tic30_select_reloc (reloc_howto_type *howto)
100 {
101   return howto->type;
102 }
103 
104 #define SELECT_RELOC(x,howto) x.r_type = coff_tic30_select_reloc(howto)
105 
106 #define BADMAG(x) TIC30BADMAG(x)
107 #define TIC30 1			/* Customize coffcode.h */
108 #define __A_MAGIC_SET__
109 
110 /* Code to swap in the reloc */
111 #define SWAP_IN_RELOC_OFFSET  H_GET_32
112 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
113 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) dst->r_stuff[0] = 'S'; \
114 dst->r_stuff[1] = 'C';
115 
116 /* Code to turn a r_type into a howto ptr, uses the above howto table.  */
117 
118 static void
rtype2howto(arelent * internal,struct internal_reloc * dst)119 rtype2howto (arelent *internal, struct internal_reloc *dst)
120 {
121   switch (dst->r_type)
122     {
123     case R_TIC30_ABS16:
124       internal->howto = &tic30_coff_howto_table[0];
125       break;
126     case R_TIC30_ABS24:
127       internal->howto = &tic30_coff_howto_table[1];
128       break;
129     case R_TIC30_ABS32:
130       internal->howto = &tic30_coff_howto_table[3];
131       break;
132     case R_TIC30_LDP:
133       internal->howto = &tic30_coff_howto_table[2];
134       break;
135     case R_TIC30_PC16:
136       internal->howto = &tic30_coff_howto_table[4];
137       break;
138     default:
139       internal->howto = NULL;
140       break;
141     }
142 }
143 
144 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
145 
146 /* Perform any necessary magic to the addend in a reloc entry */
147 
148 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
149  cache_ptr->addend =  ext_reloc.r_offset;
150 
151 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
152  reloc_processing(relent, reloc, symbols, abfd, section)
153 
154 static void
reloc_processing(arelent * relent,struct internal_reloc * reloc,asymbol ** symbols,bfd * abfd,asection * section)155 reloc_processing (arelent *relent,
156 		  struct internal_reloc *reloc,
157 		  asymbol **symbols,
158 		  bfd *abfd,
159 		  asection *section)
160 {
161   relent->address = reloc->r_vaddr;
162   rtype2howto (relent, reloc);
163 
164   if (reloc->r_symndx > 0)
165     relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
166   else
167     relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
168 
169   relent->addend = reloc->r_offset;
170   relent->address -= section->vma;
171 }
172 
173 #ifndef bfd_pe_print_pdata
174 #define bfd_pe_print_pdata	NULL
175 #endif
176 
177 #include "coffcode.h"
178 
179 const bfd_target tic30_coff_vec =
180 {
181   "coff-tic30",			/* name */
182   bfd_target_coff_flavour,
183   BFD_ENDIAN_BIG,		/* data byte order is big */
184   BFD_ENDIAN_LITTLE,		/* header byte order is little */
185 
186   (HAS_RELOC | EXEC_P |		/* object flags */
187    HAS_LINENO | HAS_DEBUG |
188    HAS_SYMS | HAS_LOCALS | WP_TEXT),
189 
190   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
191   '_',				/* leading symbol underscore */
192   '/',				/* ar_pad_char */
193   15,				/* ar_max_namelen */
194   0,				/* match priority.  */
195   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
196   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
197   bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* data */
198   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
199   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
200   bfd_getl16, bfd_getl_signed_16, bfd_putl16,	/* hdrs */
201 
202   {_bfd_dummy_target, coff_object_p,	/* bfd_check_format */
203    bfd_generic_archive_p, _bfd_dummy_target},
204   {bfd_false, coff_mkobject, _bfd_generic_mkarchive,	/* bfd_set_format */
205    bfd_false},
206   {bfd_false, coff_write_object_contents,	/* bfd_write_contents */
207    _bfd_write_archive_contents, bfd_false},
208 
209   BFD_JUMP_TABLE_GENERIC (coff),
210   BFD_JUMP_TABLE_COPY (coff),
211   BFD_JUMP_TABLE_CORE (_bfd_nocore),
212   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
213   BFD_JUMP_TABLE_SYMBOLS (coff),
214   BFD_JUMP_TABLE_RELOCS (coff),
215   BFD_JUMP_TABLE_WRITE (coff),
216   BFD_JUMP_TABLE_LINK (coff),
217   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
218 
219   NULL,
220 
221   COFF_SWAP_TABLE
222 };
223