1 /* This file is tc-sh.h
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
3 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_BYTES_BIG_ENDIAN 0
26 #define TARGET_ARCH bfd_arch_sh
29 struct segment_info_struct
;
30 struct internal_reloc
;
33 /* Whether in little endian mode. */
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)
62 /* The type fixS is defined (to struct fix) in write.h, but write.h uses
63 definitions from this file. To avoid problems with including write.h
64 after the "right" definitions, don't; just forward-declare struct fix
67 extern int sh_force_relocation
PARAMS ((struct fix
*));
70 #define obj_fix_adjustable(fixP) sh_fix_adjustable(fixP)
72 extern boolean sh_fix_adjustable
PARAMS ((struct fix
*));
74 /* This arranges for gas/write.c to not apply a relocation if
75 obj_fix_adjustable() says it is not adjustable. */
76 #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP)
79 #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section (FIXP, SEC)
80 extern long md_pcrel_from_section
PARAMS ((struct fix
*, segT
));
82 #define IGNORE_NONSTANDARD_ESCAPES
84 #define LISTING_HEADER (shl ? "Hitachi Super-H GAS Little Endian" : "Hitachi Super-H GAS Big Endian")
88 extern const struct relax_type md_relax_table
[];
89 #define TC_GENERIC_RELAX_TABLE md_relax_table
91 /* We record, for each section, whether we have most recently output a
92 CODE reloc or a DATA reloc. */
93 struct sh_segment_info_type
97 #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type
99 /* We call a routine to emit a reloc for a label, so that the linker
100 can align loads and stores without crossing a label. */
101 extern void sh_frob_label
PARAMS ((void));
102 #define tc_frob_label(sym) sh_frob_label ()
104 /* We call a routine to flush pending output in order to output a DATA
105 reloc when required. */
106 extern void sh_flush_pending_output
PARAMS ((void));
107 #define md_flush_pending_output() sh_flush_pending_output ()
110 #define tc_frob_file_before_adjust sh_frob_file
112 #define tc_frob_file sh_frob_file
114 extern void sh_frob_file
PARAMS ((void));
117 /* COFF specific definitions. */
119 #define DO_NOT_STRIP 0
121 /* This macro translates between an internal fix and an coff reloc type */
122 #define TC_COFF_FIX2RTYPE(fix) ((fix)->fx_r_type)
124 #define BFD_ARCH TARGET_ARCH
126 #define COFF_MAGIC (shl ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG)
128 /* We need to write out relocs which have not been completed. */
129 #define TC_COUNT_RELOC(fix) ((fix)->fx_addsy != NULL)
131 #define TC_RELOC_MANGLE(seg, fix, int, paddr) \
132 sh_coff_reloc_mangle ((seg), (fix), (int), (paddr))
133 extern void sh_coff_reloc_mangle
134 PARAMS ((struct segment_info_struct
*, struct fix
*,
135 struct internal_reloc
*, unsigned int));
137 #define tc_coff_symbol_emit_hook(a) ; /* not used */
139 #define NEED_FX_R_TYPE 1
141 #define TC_KEEP_FX_OFFSET 1
143 #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
144 extern int tc_coff_sizemachdep
PARAMS ((fragS
*));
147 #define SEG_NAME(SEG) segment_name (SEG)
149 #define SEG_NAME(SEG) obj_segment_name (SEG)
152 /* We align most sections to a 16 byte boundary. */
153 #define SUB_SEGMENT_ALIGN(SEG) \
154 (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \
156 : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \
157 || strcmp (SEG_NAME (SEG), ".ctors") == 0 \
158 || strcmp (SEG_NAME (SEG), ".dtors") == 0) \
160 : (sh_small ? 2 : 4)))
162 #endif /* OBJ_COFF */
165 /* ELF specific definitions. */
167 /* Whether or not the target is big endian */
168 extern int target_big_endian
;
171 #define TARGET_FORMAT (shl ? "elf32-sh-linux" : "elf32-shbig-linux")
173 #define TARGET_FORMAT (shl ? "elf32-shl" : "elf32-sh")
176 #define elf_tc_final_processing sh_elf_final_processing
177 extern void sh_elf_final_processing
PARAMS ((void));
179 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
181 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
183 /* This is the relocation type for direct references to
184 GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such
185 as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed
186 normally with the regular expressions. The fixup specified here
187 when used at runtime implies that we should add the address of the
188 GOT to the specified location, and as a result we have simplified
189 the expression into something we can use. */
190 #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC
192 /* This expression evaluates to false if the relocation is for a local object
193 for which we still want to do the relocation at runtime. True if we
194 are willing to perform this relocation while building the .o file.
195 This is only used for pcrel relocations, so GOTOFF does not need to be
196 checked here. I am not sure if some of the others are ever used with
197 pcrel, but it is easier to be safe than sorry.
199 We can't resolve references to the GOT or the PLT when creating the
200 object file, since these tables are only created by the linker.
201 Also, if the symbol is global, weak, common or not defined, the
202 assembler can't compute the appropriate reloc, since its location
203 can only be determined at link time. */
205 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
206 ((FIX)->fx_r_type != BFD_RELOC_32_PLT_PCREL \
207 && (FIX)->fx_r_type != BFD_RELOC_32_GOT_PCREL \
208 && (FIX)->fx_r_type != BFD_RELOC_SH_GOTPC \
209 && ((FIX)->fx_addsy == NULL \
210 || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
211 && ! S_IS_WEAK ((FIX)->fx_addsy) \
212 && S_IS_DEFINED ((FIX)->fx_addsy) \
213 && ! S_IS_COMMON ((FIX)->fx_addsy))))