[deliverable/binutils-gdb.git] / gas / config / tc-sh.h

/* This file is tc-sh.h
   Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.

   This file is part of GAS, the GNU Assembler.

   GAS is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   GAS is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GAS; see the file COPYING.  If not, write to
   the Free Software Foundation, 51 Franklin Street - Fifth Floor,
   Boston, MA 02110-1301, USA.  */

#define TC_SH

#define TARGET_ARCH bfd_arch_sh

/* The type fixS is defined (to struct fix) in write.h, but write.h uses
   definitions from this file.  To avoid problems with including write.h
   after the "right" definitions, don't; just forward-declare struct fix
   here.  */
struct fix;
struct segment_info_struct;
struct internal_reloc;

/* Whether -relax was used.  */
extern int sh_relax;

/* Whether -small was used.  */
extern int sh_small;

/* Don't try to break words.  */
#define WORKING_DOT_WORD

/* We require .long, et. al., to be aligned correctly.  */
#define md_cons_align(nbytes) sh_cons_align (nbytes)
extern void sh_cons_align (int);

/* We need to optimize expr with taking account of rs_align_test
   frags.  */

#define md_optimize_expr(l,o,r) sh_optimize_expr (l, o, r)
extern int sh_optimize_expr (expressionS *, operatorT, expressionS *);

/* When relaxing, we need to generate relocations for alignment
   directives.  */
#define HANDLE_ALIGN(frag) sh_handle_align (frag)
extern void sh_handle_align (fragS *);

#define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2)

/* We need to force out some relocations when relaxing.  */
#define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix)
extern int sh_force_relocation (struct fix *);

/* This macro decides whether a particular reloc is an entry in a
   switch table.  It is used when relaxing, because the linker needs
   to know about all such entries so that it can adjust them if
   necessary.  */

#define SWITCH_TABLE(FIX)				\
  ((FIX)->fx_addsy != NULL				\
   && (FIX)->fx_subsy != NULL				\
   && S_GET_SEGMENT ((FIX)->fx_addsy) == text_section	\
   && S_GET_SEGMENT ((FIX)->fx_subsy) == text_section	\
   && ((FIX)->fx_r_type == BFD_RELOC_32			\
       || (FIX)->fx_r_type == BFD_RELOC_16		\
       || (FIX)->fx_r_type == BFD_RELOC_8))

#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC)		\
  (! SEG_NORMAL (SEC)					\
   || TC_FORCE_RELOCATION (FIX)				\
   || (sh_relax && SWITCH_TABLE (FIX)))

/* Don't complain when we leave fx_subsy around.  */
#define TC_VALIDATE_FIX_SUB(FIX)			\
  (sh_relax && SWITCH_TABLE (FIX))

#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
extern long md_pcrel_from_section (struct fix *, segT);

/* SH_COUNT relocs are allowed outside of frag.
   The target is also buggy and sets fix size too large for other relocs.  */
#define TC_FX_SIZE_SLACK(FIX) \
  ((FIX)->fx_r_type == BFD_RELOC_SH_COUNT ? -1 : 2)

#define IGNORE_NONSTANDARD_ESCAPES

#define LISTING_HEADER \
  (!target_big_endian \
   ? "Renesas / SuperH SH GAS Little Endian" \
   : "Renesas / SuperH SH GAS Big Endian")

#define md_operand(x)

extern const struct relax_type md_relax_table[];
#define TC_GENERIC_RELAX_TABLE md_relax_table

/* We record, for each section, whether we have most recently output a
   CODE reloc or a DATA reloc.  */
struct sh_segment_info_type
{
  int in_code : 1;
};
#define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type

/* We call a routine to emit a reloc for a label, so that the linker
   can align loads and stores without crossing a label.  */
extern void sh_frob_label (symbolS *);
#define tc_frob_label(sym) sh_frob_label (sym)

/* We call a routine to flush pending output in order to output a DATA
   reloc when required.  */
extern void sh_flush_pending_output (void);
#define md_flush_pending_output() sh_flush_pending_output ()

#define tc_frob_file_before_adjust sh_frob_file
extern void sh_frob_file (void);


#ifdef OBJ_COFF
/* COFF specific definitions.  */

#define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG)

#define tc_coff_symbol_emit_hook(a) ; /* not used */

#define TC_KEEP_FX_OFFSET 1

#define SEG_NAME(SEG) segment_name (SEG)

/* We align most sections to a 16 byte boundary.  */
#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN)			\
  (strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0		\
   ? 0							\
   : ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0	\
       || strcmp (SEG_NAME (SEG), ".ctors") == 0	\
       || strcmp (SEG_NAME (SEG), ".dtors") == 0)	\
      ? 2						\
      : (sh_small ? 2 : 4)))

#endif /* OBJ_COFF */

#ifdef OBJ_ELF
/* ELF specific definitions.  */

/* Whether or not the target is big endian */
extern int target_big_endian;
#ifdef TE_LINUX
#define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux")
#elif defined(TE_NetBSD)
#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd")
#elif defined TARGET_SYMBIAN
#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-symbian" : "elf32-sh-symbian")
#elif defined (TE_VXWORKS)
#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-vxworks" : "elf32-sh-vxworks")
#else
#define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh")
#endif

#define elf_tc_final_processing sh_elf_final_processing
extern void sh_elf_final_processing (void);

#define DIFF_EXPR_OK		/* foo-. gets turned into PC relative relocs */

#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"

/* This is the relocation type for direct references to
   GLOBAL_OFFSET_TABLE.  It comes up in complicated expressions such
   as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed
   normally with the regular expressions.  The fixup specified here
   when used at runtime implies that we should add the address of the
   GOT to the specified location, and as a result we have simplified
   the expression into something we can use.  */
#define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC

#define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX)
extern bfd_boolean sh_fix_adjustable (struct fix *);

/* Values passed to md_apply_fix don't include symbol values.  */
#define MD_APPLY_SYM_VALUE(FIX) 0

/* This expression evaluates to true if the relocation is for a local object
   for which we still want to do the relocation at runtime.  False if we
   are willing to perform this relocation while building the .o file.

   We can't resolve references to the GOT or the PLT when creating the
   object file, since these tables are only created by the linker.
   Also, if the symbol is global, weak, common or not defined, the
   assembler can't compute the appropriate reloc, since its location
   can only be determined at link time.  */

#define TC_FORCE_RELOCATION_LOCAL(FIX)			\
  (!(FIX)->fx_pcrel					\
   || (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL	\
   || (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL	\
   || (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC		\
   || TC_FORCE_RELOCATION (FIX))

#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) (sh_relax && SWITCH_TABLE (FIX))

/* This keeps the subtracted symbol around, for use by PLT_PCREL
   relocs.  */
#define TC_FORCE_RELOCATION_SUB_ABS(FIX)		\
  ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL)

/* Don't complain when we leave fx_subsy around.  */
#undef TC_VALIDATE_FIX_SUB
#define TC_VALIDATE_FIX_SUB(FIX)			\
  ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL		\
   || (sh_relax && SWITCH_TABLE (FIX)))

#define md_parse_name(name, exprP, mode, nextcharP) \
  sh_parse_name ((name), (exprP), (mode), (nextcharP))
int sh_parse_name (char const *name, expressionS *exprP,
		   enum expr_mode mode, char *nextchar);

#define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \
  sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP))
void sh_cons_fix_new (fragS *, int, int, expressionS *);

/* This is used to construct expressions out of @GOTOFF, @PLT and @GOT
   symbols.  The relocation type is stored in X_md.  */
#define O_PIC_reloc O_md1

#define TARGET_USE_CFIPOP 1

#define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions
extern void sh_cfi_frame_initial_instructions (void);

#define tc_regname_to_dw2regnum sh_regname_to_dw2regnum
extern int sh_regname_to_dw2regnum (char *regname);

/* All SH instructions are multiples of 16 bits.  */
#define DWARF2_LINE_MIN_INSN_LENGTH 2
#define DWARF2_DEFAULT_RETURN_COLUMN 17
#define DWARF2_CIE_DATA_ALIGNMENT (-4)

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