1 /* m68hc11 & m68hc12 ELF support for BFD.
2    Copyright (C) 1999-2016 Free Software Foundation, Inc.
3 
4    This file is part of BFD, the Binary File Descriptor library.
5 
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 3 of the License, or
9    (at your option) any later version.
10 
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15 
16    You should have received a copy of the GNU General Public License
17    along with this program; if not, write to the Free Software Foundation,
18    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
19 
20 #ifndef _ELF_M68HC11_H
21 #define _ELF_M68HC11_H
22 
23 #include "elf/reloc-macros.h"
24 
25 /* Relocation types.  */
26 START_RELOC_NUMBERS (elf_m68hc11_reloc_type)
27   RELOC_NUMBER (R_M68HC11_NONE, 0)
28   RELOC_NUMBER (R_M68HC11_8, 1)
29   RELOC_NUMBER (R_M68HC11_HI8, 2)
30   RELOC_NUMBER (R_M68HC11_LO8, 3)
31   RELOC_NUMBER (R_M68HC11_PCREL_8, 4)
32   RELOC_NUMBER (R_M68HC11_16, 5)
33   RELOC_NUMBER (R_M68HC11_32, 6)
34   RELOC_NUMBER (R_M68HC11_3B, 7)
35   RELOC_NUMBER (R_M68HC11_PCREL_16, 8)
36 
37      /* These are GNU extensions to enable C++ vtable garbage collection.  */
38   RELOC_NUMBER (R_M68HC11_GNU_VTINHERIT, 9)
39   RELOC_NUMBER (R_M68HC11_GNU_VTENTRY, 10)
40 
41   RELOC_NUMBER (R_M68HC11_24, 11)
42   RELOC_NUMBER (R_M68HC11_LO16, 12)
43   RELOC_NUMBER (R_M68HC11_PAGE, 13)
44 
45   RELOC_NUMBER (R_M68HC12_16B, 15)
46   RELOC_NUMBER (R_M68HC12_PCREL_9, 16)
47   RELOC_NUMBER (R_M68HC12_PCREL_10, 17)
48   RELOC_NUMBER (R_M68HC12_HI8XG, 18)
49   RELOC_NUMBER (R_M68HC12_LO8XG, 19)
50 
51      /* GNU extension for linker relaxation.
52         Mark beginning of a jump instruction (any form).  */
53   RELOC_NUMBER (R_M68HC11_RL_JUMP, 20)
54 
55      /* Mark beginning of Gcc relaxation group instruction.  */
56   RELOC_NUMBER (R_M68HC11_RL_GROUP, 21)
57 END_RELOC_NUMBERS (R_M68HC11_max)
58 
59 /* Processor specific flags for the ELF header e_flags field.  */
60 
61 /* ABI identification.  */
62 #define EF_M68HC11_ABI  0x00000000F
63 
64 /* Integers are 32-bit long.  */
65 #define E_M68HC11_I32   0x000000001
66 
67 /* Doubles are 64-bit long.  */
68 #define E_M68HC11_F64   0x000000002
69 
70 /* Uses 68HC12 memory banks.  */
71 #define E_M68HC12_BANKS 0x000000004
72 
73 /* XGATE ram offsetting.  */
74 #define E_M68HC11_XGATE_RAMOFFSET     0x000000100
75 
76 /* Suppress warnings */
77 #define E_M68HC11_NO_BANK_WARNING     0x000000200
78 
79 #define EF_M68HC11_MACH_MASK 0xF0
80 #define EF_M68HC11_GENERIC   0x00 /* Generic 68HC12/backward compatibility.  */
81 #define EF_M68HC12_MACH      0x10 /* 68HC12 microcontroller.  */
82 #define EF_M68HCS12_MACH     0x20 /* 68HCS12 microcontroller.  */
83 #define EF_M68HC11_MACH(mach) ((mach) & EF_M68HC11_MACH_MASK)
84 
85 /* True if we can merge machines.  A generic HC12 can work on any proc
86    but once we have specific code, merge is not possible.  */
87 #define EF_M68HC11_CAN_MERGE_MACH(mach1, mach2) \
88   ((EF_M68HC11_MACH (mach1) == EF_M68HC11_MACH (mach2)) \
89    || (EF_M68HC11_MACH (mach1) == EF_M68HC11_GENERIC) \
90    || (EF_M68HC11_MACH (mach2) == EF_M68HC11_GENERIC))
91 
92 #define EF_M68HC11_MERGE_MACH(mach1, mach2) \
93   (((EF_M68HC11_MACH (mach1) == EF_M68HC11_MACH (mach2)) \
94     || (EF_M68HC11_MACH (mach1) == EF_M68HC11_GENERIC)) ? \
95       EF_M68HC11_MACH (mach2) : EF_M68HC11_MACH (mach1))
96 
97 
98 /* Special values for the st_other field in the symbol table.  These
99    are used for 68HC12 to identify far functions (must be called with
100    'call' and returns with 'rtc').  */
101 #define STO_M68HC12_FAR          0x80
102 
103 /* Identify interrupt handlers.  This is used by the debugger to
104    correctly compute the stack frame.  */
105 #define STO_M68HC12_INTERRUPT    0x40
106 
107 #endif
108