1 /* tc-mn10300.h -- Header file for tc-mn10300.c.
2    Copyright (C) 1996-2016 Free Software Foundation, Inc.
3 
4    This file is part of GAS, the GNU Assembler.
5 
6    GAS 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, or (at your option)
9    any later version.
10 
11    GAS 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 GAS; see the file COPYING.  If not, write to the Free
18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19    02110-1301, USA.  */
20 
21 #define TC_MN10300
22 
23 #define TARGET_BYTES_BIG_ENDIAN 0
24 
25 #define DIFF_EXPR_OK
26 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
27 
28 #define TC_FORCE_RELOCATION(FIX) mn10300_force_relocation (FIX)
29 extern bfd_boolean mn10300_force_relocation (struct fix *);
30 
31 #define TC_FORCE_RELOCATION_LOCAL(FIX)			\
32   (!(FIX)->fx_pcrel					\
33    || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL	\
34    || (FIX)->fx_r_type == BFD_RELOC_MN10300_GOT32	\
35    || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL	\
36    || TC_FORCE_RELOCATION (FIX))
37 
38 #define md_parse_name(NAME, EXPRP, MODE, NEXTCHARP) \
39     mn10300_parse_name ((NAME), (EXPRP), (MODE), (NEXTCHARP))
40 int mn10300_parse_name (char const *, expressionS *, enum expr_mode, char *);
41 
42 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)	\
43   mn10300_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC))
44 void mn10300_cons_fix_new (fragS *, int, int, expressionS *,
45 			   bfd_reloc_code_real_type);
46 
47 /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT
48    symbols.  The relocation type is stored in X_md.  */
49 #define O_PIC_reloc O_md1
50 
51 /* The target BFD architecture.  */
52 #define TARGET_ARCH bfd_arch_mn10300
53 
54 #ifdef TE_LINUX
55 #define TARGET_FORMAT "elf32-am33lin"
56 #else
57 #define TARGET_FORMAT "elf32-mn10300"
58 #endif
59 
60 
61 /* Do not adjust relocations involving symbols in code sections,
62    because it breaks linker relaxations.  This could be fixed in the
63    linker, but this fix is simpler, and it pretty much only affects
64    object size a little bit.  */
65 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC)	\
66   (((SEC)->flags & SEC_CODE) != 0		\
67    || ! SEG_NORMAL (SEC)			\
68    || (FIX)->fx_r_type == BFD_RELOC_MN10300_ALIGN \
69    || TC_FORCE_RELOCATION (FIX))
70 
71 /* We validate subtract arguments within tc_gen_reloc(), so don't
72    report errors at this point.  */
73 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
74 
75 /* Fixup debug sections since we will never relax them.  Ideally, we
76    could do away with this and instead check every single fixup with
77    TC_FORCE_RELOCATION and TC_FORCE_RELOCATION_SUB_NAME, verifying
78    that the sections of the referenced symbols (and not the sections
79    in which the fixup appears) may be subject to relaxation.  We'd
80    still have to check the section in which the fixup appears, because
81    we want to do some simplifications in debugging info that might
82    break in real code.
83 
84    Using the infrastructure in write.c to simplify subtraction fixups
85    would enable us to remove a lot of code from tc_gen_reloc(), but
86    this is simpler, faster, and produces almost the same effect.
87    Also, in the macros above, we can't check whether the fixup is in a
88    debugging section or not, so we have to use this for now.  */
89 #define TC_LINKRELAX_FIXUP(seg) (seg->flags & SEC_ALLOC)
90 
91 #define md_operand(x)
92 
93 /* Permit temporary numeric labels.  */
94 #define LOCAL_LABELS_FB 1
95 
96 /* We don't need to handle .word strangely.  */
97 #define WORKING_DOT_WORD
98 
99 #define md_number_to_chars number_to_chars_littleendian
100 
101 #define tc_fix_adjustable(FIX) mn10300_fix_adjustable (FIX)
102 extern bfd_boolean mn10300_fix_adjustable (struct fix *);
103 
104 /* We do relaxing in the assembler as well as the linker.  */
105 extern const struct relax_type md_relax_table[];
106 #define TC_GENERIC_RELAX_TABLE md_relax_table
107 
108 #define DWARF2_LINE_MIN_INSN_LENGTH 1
109 
110 /* The difference between same-section symbols may be affected by linker
111    relaxation, so do not resolve such expressions in the assembler.  */
112 #define md_allow_local_subtract(l,r,s) mn10300_allow_local_subtract (l, r, s)
113 extern bfd_boolean mn10300_allow_local_subtract (expressionS *, expressionS *, segT);
114 
115 #define RELOC_EXPANSION_POSSIBLE
116 #define MAX_RELOC_EXPANSION 2
117 
118 #define TC_FRAG_TYPE bfd_boolean
119 
120 #define HANDLE_ALIGN(frag) mn10300_handle_align (frag)
121 extern void mn10300_handle_align (fragS *);
122 
123 /* Only allow call frame debug info optimization when linker relaxation is
124    not enabled as otherwise we could generate the DWARF directives without
125    the relocs necessary to patch them up.  */
126 #define md_allow_eh_opt (linkrelax == 0)
127