1 /* This file is tc-msp430.h
2 Copyright (C) 2002-2023 Free Software Foundation, Inc.
3
4 Contributed by Dmitry Diky <diwil@mail.ru>
5
6 This file is part of GAS, the GNU Assembler.
7
8 GAS 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, or (at your option)
11 any later version.
12
13 GAS 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.
17
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #define TC_MSP430
24 /* By convention, you should define this macro in the `.h' file. For
25 example, `tc-m68k.h' defines `TC_M68K'. You might have to use this
26 if it is necessary to add CPU specific code to the object format
27 file. */
28
29 #define TARGET_FORMAT "elf32-msp430"
30 /* This macro is the BFD target name to use when creating the output
31 file. This will normally depend upon the `OBJ_FMT' macro. */
32
33 #define TARGET_ARCH bfd_arch_msp430
34 /* This macro is the BFD architecture to pass to `bfd_set_arch_mach'. */
35
36 #define TARGET_MACH 0
37 /* This macro is the BFD machine number to pass to
38 `bfd_set_arch_mach'. If it is not defined, GAS will use 0. */
39
40 #define TARGET_BYTES_BIG_ENDIAN 0
41 /* You should define this macro to be non-zero if the target is big
42 endian, and zero if the target is little endian. */
43
44 #define ONLY_STANDARD_ESCAPES
45 /* If you define this macro, GAS will warn about the use of
46 nonstandard escape sequences in a string. */
47
48 #define md_operand(x)
49 /* GAS will call this function for any expression that can not be
50 recognized. When the function is called, `input_line_pointer'
51 will point to the start of the expression. */
52
53 #define md_number_to_chars number_to_chars_littleendian
54 /* This should just call either `number_to_chars_bigendian' or
55 `number_to_chars_littleendian', whichever is appropriate. On
56 targets like the MIPS which support options to change the
57 endianness, which function to call is a runtime decision. On
58 other targets, `md_number_to_chars' can be a simple macro. */
59
60 #define WORKING_DOT_WORD
61 /*
62 `md_short_jump_size'
63 `md_long_jump_size'
64 `md_create_short_jump'
65 `md_create_long_jump'
66 If `WORKING_DOT_WORD' is defined, GAS will not do broken word
67 processing (*note Broken words::.). Otherwise, you should set
68 `md_short_jump_size' to the size of a short jump (a jump that is
69 just long enough to jump around a long jmp) and
70 `md_long_jump_size' to the size of a long jump (a jump that can go
71 anywhere in the function), You should define
72 `md_create_short_jump' to create a short jump around a long jump,
73 and define `md_create_long_jump' to create a long jump. */
74
75 #define MD_APPLY_FIX3
76 /* Values passed to md_apply_fix don't include symbol values. */
77 #define MD_APPLY_SYM_VALUE(FIX) 0
78
79 #define TC_HANDLES_FX_DONE
80
81 #undef RELOC_EXPANSION_POSSIBLE
82 /* If you define this macro, it means that `tc_gen_reloc' may return
83 multiple relocation entries for a single fixup. In this case, the
84 return value of `tc_gen_reloc' is a pointer to a null terminated
85 array. */
86
87 #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC)
88 /* If you define this macro, it should return the offset between the
89 address of a PC relative fixup and the position from which the PC
90 relative adjustment should be made. On many processors, the base
91 of a PC relative instruction is the next instruction, so this
92 macro would return the length of an instruction. */
93
94 #define LISTING_WORD_SIZE 2
95 /* The number of bytes to put into a word in a listing. This affects
96 the way the bytes are clumped together in the listing. For
97 example, a value of 2 might print `1234 5678' where a value of 1
98 would print `12 34 56 78'. The default value is 4. */
99
100 /* Support symbols like: C$$IO$$. */
101 #undef LEX_DOLLAR
102 #define LEX_DOLLAR 1
103
104 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) (P2VAR) = 0
105 /* An `.lcomm' directive with no explicit alignment parameter will
106 use this macro to set P2VAR to the alignment that a request for
107 SIZE bytes will have. The alignment is expressed as a power of
108 two. If no alignment should take place, the macro definition
109 should do nothing. Some targets define a `.bss' directive that is
110 also affected by this macro. The default definition will set
111 P2VAR to the truncated power of two of sizes up to eight bytes. */
112
113 #define md_relax_frag(SEG, FRAGP, STRETCH) \
114 msp430_relax_frag (SEG, FRAGP, STRETCH)
115 extern long msp430_relax_frag (segT, fragS *, long);
116
117 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
118 (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \
119 || msp430_force_relocation_local (FIX))
120 extern int msp430_force_relocation_local (struct fix *);
121
122 /* We need to add reference symbols for .data/.bss. */
123 #define tc_frob_section(sec) msp430_frob_section (sec)
124 extern void msp430_frob_section (asection *);
125
126 extern int msp430_enable_relax;
127 extern int msp430_enable_polys;
128
129 #define tc_fix_adjustable(FIX) msp430_fix_adjustable (FIX)
130 extern bool msp430_fix_adjustable (struct fix *);
131
132 /* Allow hexadecimal numbers with 'h' suffix. Note that if the number
133 starts with a letter it will be interpreted as a symbol name not a
134 constant. Thus "beach" is a symbol not the hex value 0xbeac. So
135 is A5A5h... */
136 #define NUMBERS_WITH_SUFFIX 1
137
138 #define md_finish msp430_md_finish
139 extern void msp430_md_finish (void);
140
141 /* Do not allow call frame debug info optimization as otherwise we could
142 generate the DWARF directives without the relocs necessary to patch
143 them up. */
144 #define md_allow_eh_opt 0
145
146 /* The difference between same-section symbols may be affected by linker
147 relaxation, so do not resolve such expressions in the assembler. */
148 #define md_allow_local_subtract(l,r,s) msp430_allow_local_subtract (l, r, s)
149 extern bool msp430_allow_local_subtract (expressionS *, expressionS *, segT);
150
151 #define RELOC_EXPANSION_POSSIBLE
152 #define MAX_RELOC_EXPANSION 2
153
154 #define DIFF_EXPR_OK
155
156 /* Do not adjust relocations involving symbols in code sections,
157 because it breaks linker relaxations. This could be fixed in the
158 linker, but this fix is simpler, and it pretty much only affects
159 object size a little bit. */
160 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
161 (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC) \
162 || ((SEC)->flags & SEC_CODE) != 0 \
163 || ((SEC)->flags & SEC_DEBUGGING) != 0 \
164 || TC_FORCE_RELOCATION (FIX))
165
166 /* We validate subtract arguments within tc_gen_reloc(),
167 so don't report errors at this point. */
168 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
169
170 #define DWARF2_USE_FIXED_ADVANCE_PC 1
171
172 #define TC_LINKRELAX_FIXUP(seg) ((seg->flags & SEC_CODE) || (seg->flags & SEC_DEBUGGING))
173
174 #define DWARF2_ADDR_SIZE(bfd) 4