1 /* This file is tc-sh.h
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
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
9 the Free Software Foundation; either version 2, or (at your option)
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.
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
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #define TARGET_ARCH bfd_arch_sh
27 /* The type fixS is defined (to struct fix) in write.h, but write.h uses
28 definitions from this file. To avoid problems with including write.h
29 after the "right" definitions, don't; just forward-declare struct fix
32 struct segment_info_struct;
33 struct internal_reloc;
36 /* Whether -relax was used. */
39 /* Whether -small was used. */
42 /* Don't try to break words. */
43 #define WORKING_DOT_WORD
45 /* All SH instructions are multiples of 16 bits. */
46 #define DWARF2_LINE_MIN_INSN_LENGTH 2
48 /* We require .long, et. al., to be aligned correctly. */
49 #define md_cons_align(nbytes) sh_cons_align (nbytes)
50 extern void sh_cons_align PARAMS ((int));
52 /* When relaxing, we need to generate relocations for alignment
54 #define HANDLE_ALIGN(frag) sh_handle_align (frag)
55 extern void sh_handle_align PARAMS ((fragS *));
57 #define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2)
59 /* We need to force out some relocations when relaxing. */
60 #define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix)
61 extern int sh_force_relocation PARAMS ((struct fix *));
63 /* This macro decides whether a particular reloc is an entry in a
64 switch table. It is used when relaxing, because the linker needs
65 to know about all such entries so that it can adjust them if
69 #define SWITCH_TABLE_CONS(FIX) (0)
71 #define SWITCH_TABLE_CONS(FIX) \
72 ((FIX)->fx_r_type == 0 \
73 && ((FIX)->fx_size == 2 \
74 || (FIX)->fx_size == 1 \
75 || (FIX)->fx_size == 4))
78 #define SWITCH_TABLE(FIX) \
79 ((FIX)->fx_addsy != NULL \
80 && (FIX)->fx_subsy != NULL \
81 && S_GET_SEGMENT ((FIX)->fx_addsy) == text_section \
82 && S_GET_SEGMENT ((FIX)->fx_subsy) == text_section \
83 && ((FIX)->fx_r_type == BFD_RELOC_32 \
84 || (FIX)->fx_r_type == BFD_RELOC_16 \
85 || (FIX)->fx_r_type == BFD_RELOC_8 \
86 || SWITCH_TABLE_CONS (FIX)))
88 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
90 || TC_FORCE_RELOCATION (FIX) \
91 || (sh_relax && SWITCH_TABLE (FIX)))
93 /* Don't complain when we leave fx_subsy around. */
94 #define TC_VALIDATE_FIX_SUB(FIX) \
95 (sh_relax && SWITCH_TABLE (FIX))
97 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
98 extern long md_pcrel_from_section PARAMS ((struct fix *, segT));
100 #define IGNORE_NONSTANDARD_ESCAPES
102 #define LISTING_HEADER \
103 (!target_big_endian \
104 ? "Renesas / SuperH SH GAS Little Endian" \
105 : "Renesas / SuperH SH GAS Big Endian")
107 #define md_operand(x)
109 extern const struct relax_type md_relax_table[];
110 #define TC_GENERIC_RELAX_TABLE md_relax_table
112 /* We record, for each section, whether we have most recently output a
113 CODE reloc or a DATA reloc. */
114 struct sh_segment_info_type
118 #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type
120 /* We call a routine to emit a reloc for a label, so that the linker
121 can align loads and stores without crossing a label. */
122 extern void sh_frob_label PARAMS ((void));
123 #define tc_frob_label(sym) sh_frob_label ()
125 /* We call a routine to flush pending output in order to output a DATA
126 reloc when required. */
127 extern void sh_flush_pending_output PARAMS ((void));
128 #define md_flush_pending_output() sh_flush_pending_output ()
131 #define tc_frob_file_before_adjust sh_frob_file
133 #define tc_frob_file sh_frob_file
135 extern void sh_frob_file PARAMS ((void));
139 /* COFF specific definitions. */
141 #define DO_NOT_STRIP 0
143 /* This macro translates between an internal fix and a coff reloc type. */
144 #define TC_COFF_FIX2RTYPE(fix) ((fix)->fx_r_type)
146 #define BFD_ARCH TARGET_ARCH
148 #define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG)
150 /* We need to write out relocs which have not been completed. */
151 #define TC_COUNT_RELOC(fix) ((fix)->fx_addsy != NULL)
153 #define TC_RELOC_MANGLE(seg, fix, int, paddr) \
154 sh_coff_reloc_mangle ((seg), (fix), (int), (paddr))
155 extern void sh_coff_reloc_mangle
156 PARAMS ((struct segment_info_struct *, struct fix *,
157 struct internal_reloc *, unsigned int));
159 #define tc_coff_symbol_emit_hook(a) ; /* not used */
161 #define NEED_FX_R_TYPE 1
163 #define TC_KEEP_FX_OFFSET 1
165 #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
166 extern int tc_coff_sizemachdep PARAMS ((fragS *));
169 #define SEG_NAME(SEG) segment_name (SEG)
171 #define SEG_NAME(SEG) obj_segment_name (SEG)
174 /* We align most sections to a 16 byte boundary. */
175 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
176 (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \
178 : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \
179 || strcmp (SEG_NAME (SEG), ".ctors") == 0 \
180 || strcmp (SEG_NAME (SEG), ".dtors") == 0) \
182 : (sh_small ? 2 : 4)))
184 #endif /* OBJ_COFF */
187 /* ELF specific definitions. */
189 /* Whether or not the target is big endian */
190 extern int target_big_endian;
192 #define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux")
193 #elif defined(TE_NetBSD)
194 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd")
196 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh")
199 #define elf_tc_final_processing sh_elf_final_processing
200 extern void sh_elf_final_processing PARAMS ((void));
202 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
204 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
206 /* This is the relocation type for direct references to
207 GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such
208 as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed
209 normally with the regular expressions. The fixup specified here
210 when used at runtime implies that we should add the address of the
211 GOT to the specified location, and as a result we have simplified
212 the expression into something we can use. */
213 #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC
215 #define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX)
216 extern bfd_boolean sh_fix_adjustable PARAMS ((struct fix *));
218 /* Values passed to md_apply_fix3 don't include symbol values. */
219 #define MD_APPLY_SYM_VALUE(FIX) 0
221 /* This expression evaluates to true if the relocation is for a local object
222 for which we still want to do the relocation at runtime. False if we
223 are willing to perform this relocation while building the .o file.
225 We can't resolve references to the GOT or the PLT when creating the
226 object file, since these tables are only created by the linker.
227 Also, if the symbol is global, weak, common or not defined, the
228 assembler can't compute the appropriate reloc, since its location
229 can only be determined at link time. */
231 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
234 || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
235 || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \
236 || (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC \
237 || TC_FORCE_RELOCATION (FIX))
239 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) (sh_relax && SWITCH_TABLE (FIX))
241 /* This keeps the subtracted symbol around, for use by PLT_PCREL
243 #define TC_FORCE_RELOCATION_SUB_ABS(FIX) \
244 ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL)
246 /* Don't complain when we leave fx_subsy around. */
247 #undef TC_VALIDATE_FIX_SUB
248 #define TC_VALIDATE_FIX_SUB(FIX) \
249 ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
250 || (sh_relax && SWITCH_TABLE (FIX)))
252 #define md_parse_name(name, exprP, nextcharP) \
253 sh_parse_name ((name), (exprP), (nextcharP))
254 int sh_parse_name PARAMS ((char const *name,
258 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \
259 sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP))
260 void sh_cons_fix_new PARAMS ((fragS *, int, int, expressionS *));
262 /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT
263 symbols. The relocation type is stored in X_md. */
264 #define O_PIC_reloc O_md1