1 /* This file is tc-sh.h
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005 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, 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
24 #define TARGET_ARCH bfd_arch_sh
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
31 struct segment_info_struct
;
32 struct internal_reloc
;
34 /* Whether -relax was used. */
37 /* Whether -small was used. */
40 /* Don't try to break words. */
41 #define WORKING_DOT_WORD
43 /* We require .long, et. al., to be aligned correctly. */
44 #define md_cons_align(nbytes) sh_cons_align (nbytes)
45 extern void sh_cons_align (int);
47 /* When relaxing, we need to generate relocations for alignment
49 #define HANDLE_ALIGN(frag) sh_handle_align (frag)
50 extern void sh_handle_align (fragS
*);
52 #define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2)
54 /* We need to force out some relocations when relaxing. */
55 #define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix)
56 extern int sh_force_relocation (struct fix
*);
58 /* This macro decides whether a particular reloc is an entry in a
59 switch table. It is used when relaxing, because the linker needs
60 to know about all such entries so that it can adjust them if
63 #define SWITCH_TABLE(FIX) \
64 ((FIX)->fx_addsy != NULL \
65 && (FIX)->fx_subsy != NULL \
66 && S_GET_SEGMENT ((FIX)->fx_addsy) == text_section \
67 && S_GET_SEGMENT ((FIX)->fx_subsy) == text_section \
68 && ((FIX)->fx_r_type == BFD_RELOC_32 \
69 || (FIX)->fx_r_type == BFD_RELOC_16 \
70 || (FIX)->fx_r_type == BFD_RELOC_8))
72 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
74 || TC_FORCE_RELOCATION (FIX) \
75 || (sh_relax && SWITCH_TABLE (FIX)))
77 /* Don't complain when we leave fx_subsy around. */
78 #define TC_VALIDATE_FIX_SUB(FIX) \
79 (sh_relax && SWITCH_TABLE (FIX))
81 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
82 extern long md_pcrel_from_section (struct fix
*, segT
);
84 #define IGNORE_NONSTANDARD_ESCAPES
86 #define LISTING_HEADER \
88 ? "Renesas / SuperH SH GAS Little Endian" \
89 : "Renesas / SuperH SH GAS Big Endian")
93 extern const struct relax_type md_relax_table
[];
94 #define TC_GENERIC_RELAX_TABLE md_relax_table
96 /* We record, for each section, whether we have most recently output a
97 CODE reloc or a DATA reloc. */
98 struct sh_segment_info_type
102 #define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type
104 /* We call a routine to emit a reloc for a label, so that the linker
105 can align loads and stores without crossing a label. */
106 extern void sh_frob_label (void);
107 #define tc_frob_label(sym) sh_frob_label ()
109 /* We call a routine to flush pending output in order to output a DATA
110 reloc when required. */
111 extern void sh_flush_pending_output (void);
112 #define md_flush_pending_output() sh_flush_pending_output ()
114 #define tc_frob_file_before_adjust sh_frob_file
115 extern void sh_frob_file (void);
119 /* COFF specific definitions. */
121 #define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG)
123 #define TC_RELOC_MANGLE(seg, fix, int, paddr) \
124 sh_coff_reloc_mangle ((seg), (fix), (int), (paddr))
125 extern void sh_coff_reloc_mangle
126 (struct segment_info_struct
*, struct fix
*,
127 struct internal_reloc
*, unsigned int);
129 #define tc_coff_symbol_emit_hook(a) ; /* not used */
131 #define TC_KEEP_FX_OFFSET 1
133 #define SEG_NAME(SEG) segment_name (SEG)
135 /* We align most sections to a 16 byte boundary. */
136 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
137 (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \
139 : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \
140 || strcmp (SEG_NAME (SEG), ".ctors") == 0 \
141 || strcmp (SEG_NAME (SEG), ".dtors") == 0) \
143 : (sh_small ? 2 : 4)))
145 #endif /* OBJ_COFF */
148 /* ELF specific definitions. */
150 /* Whether or not the target is big endian */
151 extern int target_big_endian
;
153 #define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux")
154 #elif defined(TE_NetBSD)
155 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd")
156 #elif defined TARGET_SYMBIAN
157 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl-symbian" : "elf32-sh-symbian")
159 #define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh")
162 #define elf_tc_final_processing sh_elf_final_processing
163 extern void sh_elf_final_processing (void);
165 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
167 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
169 /* This is the relocation type for direct references to
170 GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such
171 as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed
172 normally with the regular expressions. The fixup specified here
173 when used at runtime implies that we should add the address of the
174 GOT to the specified location, and as a result we have simplified
175 the expression into something we can use. */
176 #define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC
178 #define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX)
179 extern bfd_boolean
sh_fix_adjustable (struct fix
*);
181 /* Values passed to md_apply_fix don't include symbol values. */
182 #define MD_APPLY_SYM_VALUE(FIX) 0
184 /* This expression evaluates to true if the relocation is for a local object
185 for which we still want to do the relocation at runtime. False if we
186 are willing to perform this relocation while building the .o file.
188 We can't resolve references to the GOT or the PLT when creating the
189 object file, since these tables are only created by the linker.
190 Also, if the symbol is global, weak, common or not defined, the
191 assembler can't compute the appropriate reloc, since its location
192 can only be determined at link time. */
194 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
197 || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
198 || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \
199 || (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC \
200 || TC_FORCE_RELOCATION (FIX))
202 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) (sh_relax && SWITCH_TABLE (FIX))
204 /* This keeps the subtracted symbol around, for use by PLT_PCREL
206 #define TC_FORCE_RELOCATION_SUB_ABS(FIX) \
207 ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL)
209 /* Don't complain when we leave fx_subsy around. */
210 #undef TC_VALIDATE_FIX_SUB
211 #define TC_VALIDATE_FIX_SUB(FIX) \
212 ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
213 || (sh_relax && SWITCH_TABLE (FIX)))
215 #define md_parse_name(name, exprP, nextcharP) \
216 sh_parse_name ((name), (exprP), (nextcharP))
217 int sh_parse_name (char const *name
, expressionS
*exprP
, char *nextchar
);
219 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \
220 sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP))
221 void sh_cons_fix_new (fragS
*, int, int, expressionS
*);
223 /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT
224 symbols. The relocation type is stored in X_md. */
225 #define O_PIC_reloc O_md1
227 #define TARGET_USE_CFIPOP 1
229 #define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions
230 extern void sh_cfi_frame_initial_instructions (void);
232 #define tc_regname_to_dw2regnum sh_regname_to_dw2regnum
233 extern int sh_regname_to_dw2regnum (const char *regname
);
235 /* All SH instructions are multiples of 16 bits. */
236 #define DWARF2_LINE_MIN_INSN_LENGTH 2
237 #define DWARF2_DEFAULT_RETURN_COLUMN 17
238 #define DWARF2_CIE_DATA_ALIGNMENT -4