Commit | Line | Data |
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252b5132 | 1 | /* This file is tc-sh.h |
ae6063d4 | 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
20ee54e8 | 3 | 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
10 | any later version. |
11 | ||
12 | GAS 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 GAS; see the file COPYING. If not, write to | |
4b4da160 NC |
19 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
252b5132 RH |
21 | |
22 | #define TC_SH | |
23 | ||
252b5132 RH |
24 | #define TARGET_ARCH bfd_arch_sh |
25 | ||
a161fe53 AM |
26 | /* The type fixS is defined (to struct fix) in write.h, but write.h uses |
27 | definitions from this file. To avoid problems with including write.h | |
28 | after the "right" definitions, don't; just forward-declare struct fix | |
29 | here. */ | |
30 | struct fix; | |
252b5132 RH |
31 | struct segment_info_struct; |
32 | struct internal_reloc; | |
252b5132 | 33 | |
252b5132 RH |
34 | /* Whether -relax was used. */ |
35 | extern int sh_relax; | |
36 | ||
37 | /* Whether -small was used. */ | |
38 | extern int sh_small; | |
39 | ||
40 | /* Don't try to break words. */ | |
41 | #define WORKING_DOT_WORD | |
42 | ||
43 | /* We require .long, et. al., to be aligned correctly. */ | |
44 | #define md_cons_align(nbytes) sh_cons_align (nbytes) | |
8edc77b9 | 45 | extern void sh_cons_align (int); |
252b5132 | 46 | |
0cc34095 KK |
47 | /* We need to optimize expr with taking account of rs_align_test |
48 | frags. */ | |
49 | ||
541d2ffd | 50 | #ifdef OBJ_ELF |
0cc34095 KK |
51 | #define md_optimize_expr(l,o,r) sh_optimize_expr (l, o, r) |
52 | extern int sh_optimize_expr (expressionS *, operatorT, expressionS *); | |
541d2ffd | 53 | #endif |
0cc34095 | 54 | |
252b5132 RH |
55 | /* When relaxing, we need to generate relocations for alignment |
56 | directives. */ | |
57 | #define HANDLE_ALIGN(frag) sh_handle_align (frag) | |
8edc77b9 | 58 | extern void sh_handle_align (fragS *); |
252b5132 | 59 | |
0a9ef439 RH |
60 | #define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2) |
61 | ||
252b5132 RH |
62 | /* We need to force out some relocations when relaxing. */ |
63 | #define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix) | |
8edc77b9 | 64 | extern int sh_force_relocation (struct fix *); |
252b5132 | 65 | |
a161fe53 AM |
66 | /* This macro decides whether a particular reloc is an entry in a |
67 | switch table. It is used when relaxing, because the linker needs | |
68 | to know about all such entries so that it can adjust them if | |
69 | necessary. */ | |
a1cc9221 | 70 | |
a161fe53 AM |
71 | #define SWITCH_TABLE(FIX) \ |
72 | ((FIX)->fx_addsy != NULL \ | |
73 | && (FIX)->fx_subsy != NULL \ | |
74 | && S_GET_SEGMENT ((FIX)->fx_addsy) == text_section \ | |
75 | && S_GET_SEGMENT ((FIX)->fx_subsy) == text_section \ | |
76 | && ((FIX)->fx_r_type == BFD_RELOC_32 \ | |
77 | || (FIX)->fx_r_type == BFD_RELOC_16 \ | |
7be1c489 | 78 | || (FIX)->fx_r_type == BFD_RELOC_8)) |
a161fe53 | 79 | |
ae6063d4 AM |
80 | #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ |
81 | (! SEG_NORMAL (SEC) \ | |
82 | || TC_FORCE_RELOCATION (FIX) \ | |
a161fe53 AM |
83 | || (sh_relax && SWITCH_TABLE (FIX))) |
84 | ||
85 | /* Don't complain when we leave fx_subsy around. */ | |
86 | #define TC_VALIDATE_FIX_SUB(FIX) \ | |
87 | (sh_relax && SWITCH_TABLE (FIX)) | |
88 | ||
89 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC) | |
8edc77b9 | 90 | extern long md_pcrel_from_section (struct fix *, segT); |
79ad6e94 | 91 | |
d31f0f6d AM |
92 | /* SH_COUNT relocs are allowed outside of frag. |
93 | The target is also buggy and sets fix size too large for other relocs. */ | |
94 | #define TC_FX_SIZE_SLACK(FIX) \ | |
95 | ((FIX)->fx_r_type == BFD_RELOC_SH_COUNT ? -1 : 2) | |
96 | ||
252b5132 RH |
97 | #define IGNORE_NONSTANDARD_ESCAPES |
98 | ||
05982cac HPN |
99 | #define LISTING_HEADER \ |
100 | (!target_big_endian \ | |
ef230218 JR |
101 | ? "Renesas / SuperH SH GAS Little Endian" \ |
102 | : "Renesas / SuperH SH GAS Big Endian") | |
252b5132 RH |
103 | |
104 | #define md_operand(x) | |
105 | ||
106 | extern const struct relax_type md_relax_table[]; | |
107 | #define TC_GENERIC_RELAX_TABLE md_relax_table | |
108 | ||
252b5132 RH |
109 | /* We record, for each section, whether we have most recently output a |
110 | CODE reloc or a DATA reloc. */ | |
111 | struct sh_segment_info_type | |
112 | { | |
113 | int in_code : 1; | |
114 | }; | |
115 | #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type | |
116 | ||
117 | /* We call a routine to emit a reloc for a label, so that the linker | |
118 | can align loads and stores without crossing a label. */ | |
07a53e5c RH |
119 | extern void sh_frob_label (symbolS *); |
120 | #define tc_frob_label(sym) sh_frob_label (sym) | |
252b5132 RH |
121 | |
122 | /* We call a routine to flush pending output in order to output a DATA | |
123 | reloc when required. */ | |
8edc77b9 | 124 | extern void sh_flush_pending_output (void); |
252b5132 RH |
125 | #define md_flush_pending_output() sh_flush_pending_output () |
126 | ||
252b5132 | 127 | #define tc_frob_file_before_adjust sh_frob_file |
8edc77b9 | 128 | extern void sh_frob_file (void); |
252b5132 | 129 | |
a161fe53 | 130 | |
252b5132 RH |
131 | #ifdef OBJ_COFF |
132 | /* COFF specific definitions. */ | |
133 | ||
05982cac | 134 | #define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG) |
252b5132 | 135 | |
252b5132 RH |
136 | #define tc_coff_symbol_emit_hook(a) ; /* not used */ |
137 | ||
252b5132 RH |
138 | #define TC_KEEP_FX_OFFSET 1 |
139 | ||
21d75ec2 | 140 | #define SEG_NAME(SEG) segment_name (SEG) |
21d75ec2 | 141 | |
252b5132 | 142 | /* We align most sections to a 16 byte boundary. */ |
18e1d487 | 143 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \ |
21d75ec2 NC |
144 | (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \ |
145 | ? 0 \ | |
146 | : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \ | |
147 | || strcmp (SEG_NAME (SEG), ".ctors") == 0 \ | |
148 | || strcmp (SEG_NAME (SEG), ".dtors") == 0) \ | |
149 | ? 2 \ | |
252b5132 RH |
150 | : (sh_small ? 2 : 4))) |
151 | ||
152 | #endif /* OBJ_COFF */ | |
153 | ||
154 | #ifdef OBJ_ELF | |
155 | /* ELF specific definitions. */ | |
156 | ||
157 | /* Whether or not the target is big endian */ | |
158 | extern int target_big_endian; | |
d07ed2cd | 159 | #ifdef TE_LINUX |
05982cac | 160 | #define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux") |
8d05742f JT |
161 | #elif defined(TE_NetBSD) |
162 | #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd") | |
85fbca6a NC |
163 | #elif defined TARGET_SYMBIAN |
164 | #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-symbian" : "elf32-sh-symbian") | |
55e6e397 RS |
165 | #elif defined (TE_VXWORKS) |
166 | #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-vxworks" : "elf32-sh-vxworks") | |
d07ed2cd | 167 | #else |
05982cac | 168 | #define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh") |
d07ed2cd | 169 | #endif |
252b5132 | 170 | |
d4845d57 | 171 | #define elf_tc_final_processing sh_elf_final_processing |
8edc77b9 | 172 | extern void sh_elf_final_processing (void); |
d4845d57 | 173 | |
a1cc9221 AO |
174 | #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ |
175 | ||
176 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" | |
81d4177b | 177 | |
a1cc9221 AO |
178 | /* This is the relocation type for direct references to |
179 | GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such | |
180 | as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed | |
181 | normally with the regular expressions. The fixup specified here | |
182 | when used at runtime implies that we should add the address of the | |
183 | GOT to the specified location, and as a result we have simplified | |
184 | the expression into something we can use. */ | |
185 | #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC | |
186 | ||
a161fe53 | 187 | #define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX) |
8edc77b9 | 188 | extern bfd_boolean sh_fix_adjustable (struct fix *); |
a161fe53 | 189 | |
55cf6793 | 190 | /* Values passed to md_apply_fix don't include symbol values. */ |
a161fe53 AM |
191 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
192 | ||
193 | /* This expression evaluates to true if the relocation is for a local object | |
194 | for which we still want to do the relocation at runtime. False if we | |
a1cc9221 | 195 | are willing to perform this relocation while building the .o file. |
a1cc9221 AO |
196 | |
197 | We can't resolve references to the GOT or the PLT when creating the | |
198 | object file, since these tables are only created by the linker. | |
199 | Also, if the symbol is global, weak, common or not defined, the | |
200 | assembler can't compute the appropriate reloc, since its location | |
201 | can only be determined at link time. */ | |
202 | ||
a161fe53 AM |
203 | #define TC_FORCE_RELOCATION_LOCAL(FIX) \ |
204 | (!(FIX)->fx_pcrel \ | |
a161fe53 AM |
205 | || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ |
206 | || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \ | |
207 | || (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC \ | |
208 | || TC_FORCE_RELOCATION (FIX)) | |
209 | ||
bdfaef52 JR |
210 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) (sh_relax && SWITCH_TABLE (FIX)) |
211 | ||
a161fe53 AM |
212 | /* This keeps the subtracted symbol around, for use by PLT_PCREL |
213 | relocs. */ | |
9a97a5d7 AM |
214 | #define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \ |
215 | ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ | |
216 | || (!md_register_arithmetic && (SEG) == reg_section)) | |
a161fe53 AM |
217 | |
218 | /* Don't complain when we leave fx_subsy around. */ | |
219 | #undef TC_VALIDATE_FIX_SUB | |
220 | #define TC_VALIDATE_FIX_SUB(FIX) \ | |
221 | ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \ | |
222 | || (sh_relax && SWITCH_TABLE (FIX))) | |
a1cc9221 | 223 | |
9497f5ac NC |
224 | #define md_parse_name(name, exprP, mode, nextcharP) \ |
225 | sh_parse_name ((name), (exprP), (mode), (nextcharP)) | |
226 | int sh_parse_name (char const *name, expressionS *exprP, | |
227 | enum expr_mode mode, char *nextchar); | |
538cd60f AO |
228 | |
229 | #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \ | |
230 | sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP)) | |
8edc77b9 | 231 | void sh_cons_fix_new (fragS *, int, int, expressionS *); |
538cd60f AO |
232 | |
233 | /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT | |
234 | symbols. The relocation type is stored in X_md. */ | |
235 | #define O_PIC_reloc O_md1 | |
236 | ||
2ce4cc60 KK |
237 | #define TARGET_USE_CFIPOP 1 |
238 | ||
239 | #define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions | |
240 | extern void sh_cfi_frame_initial_instructions (void); | |
241 | ||
242 | #define tc_regname_to_dw2regnum sh_regname_to_dw2regnum | |
1df69f4f | 243 | extern int sh_regname_to_dw2regnum (char *regname); |
2ce4cc60 KK |
244 | |
245 | /* All SH instructions are multiples of 16 bits. */ | |
246 | #define DWARF2_LINE_MIN_INSN_LENGTH 2 | |
247 | #define DWARF2_DEFAULT_RETURN_COLUMN 17 | |
1a1219cb | 248 | #define DWARF2_CIE_DATA_ALIGNMENT (-4) |
2ce4cc60 | 249 | |
252b5132 | 250 | #endif /* OBJ_ELF */ |
6fd4f6cc DD |
251 | |
252 | #define H_TICK_HEX 1 |