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

/* This file is tc-arm.h
   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
   Free Software Foundation, Inc.
   Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
	Modified by David Taylor (dtaylor@armltd.co.uk)

   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, 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

#define TC_ARM 1

#ifndef TARGET_BYTES_BIG_ENDIAN
#define TARGET_BYTES_BIG_ENDIAN 0
#endif

#define WORKING_DOT_WORD

#define COFF_MAGIC 	ARMMAGIC
#define TARGET_ARCH 	bfd_arch_arm

#define AOUT_MACHTYPE 	0

#define DIFF_EXPR_OK

#ifdef  LITTLE_ENDIAN
#undef  LITTLE_ENDIAN
#endif

#ifdef  BIG_ENDIAN
#undef  BIG_ENDIAN
#endif

#define LITTLE_ENDIAN 	1234
#define BIG_ENDIAN 	4321

#if defined OBJ_AOUT
#if defined TE_RISCIX
# define TARGET_FORMAT "a.out-riscix"
#elif defined TE_LINUX
# define ARM_BI_ENDIAN
# define TARGET_FORMAT "a.out-arm-linux"
#elif defined TE_NetBSD
# define TARGET_FORMAT "a.out-arm-netbsd"
#else
# define ARM_BI_ENDIAN
# define TARGET_FORMAT \
  (target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
#endif
#endif /* OBJ_AOUT */

#ifdef OBJ_AIF
#define TARGET_FORMAT "aif"
#endif

struct fix;

#if defined OBJ_COFF || defined OBJ_ELF
# define ARM_BI_ENDIAN

# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
  extern void arm_validate_fix PARAMS ((struct fix *));
#endif

#ifdef OBJ_COFF
# if defined TE_PE
#   ifdef TE_EPOC
#    define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
#   else
#    define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
#   endif
# else
#  define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little")
# endif
#endif

#ifdef OBJ_ELF
# define TARGET_FORMAT elf32_arm_target_format()
  extern const char * elf32_arm_target_format PARAMS ((void));

# define md_elf_section_change_hook() arm_elf_change_section
  extern void arm_elf_change_section (void);
#endif

#define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
extern int arm_force_relocation PARAMS ((struct fix *));

#define md_convert_frag(b, s, f) {as_fatal (_("arm convert_frag\n"));}

#define md_cleanup() arm_cleanup ()
 extern void arm_cleanup PARAMS ((void));

#define md_start_line_hook() arm_start_line_hook ()
 extern void arm_start_line_hook PARAMS ((void));

#define tc_frob_label(S) arm_frob_label (S)
 extern void arm_frob_label PARAMS ((symbolS *));

/* We also need to mark assembler created symbols:  */
#define tc_frob_fake_label(S) arm_frob_label (S)

/* NOTE: The fake label creation in stabs.c:s_stab_generic() has
   deliberately not been updated to mark assembler created stabs
   symbols as Thumb.  */

#define TC_FIX_TYPE PTR
#define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL)

#if defined OBJ_ELF || defined OBJ_COFF
#define EXTERN_FORCE_RELOC 1

#define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX)
bfd_boolean arm_fix_adjustable PARAMS ((struct fix *));

/* Values passed to md_apply_fix3 don't include the symbol value.  */
#define MD_APPLY_SYM_VALUE(FIX) 0
#endif

/* We need to keep some local information on symbols.  */

#define TC_SYMFIELD_TYPE unsigned int
#define ARM_GET_FLAG(s)   	(*symbol_get_tc (s))
#define ARM_SET_FLAG(s,v) 	(*symbol_get_tc (s) |= (v))
#define ARM_RESET_FLAG(s,v) 	(*symbol_get_tc (s) &= ~(v))

#define ARM_FLAG_THUMB 		(1 << 0)	/* The symbol is a Thumb symbol rather than an Arm symbol.  */
#define ARM_FLAG_INTERWORK 	(1 << 1)	/* The symbol is attached to code that supports interworking.  */
#define THUMB_FLAG_FUNC		(1 << 2)	/* The symbol is attached to the start of a Thumb function.  */

#define ARM_IS_THUMB(s)		(ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
#define ARM_IS_INTERWORK(s)	(ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
#define THUMB_IS_FUNC(s)	(ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)

#define ARM_SET_THUMB(s,t)      ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB)     : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
#define ARM_SET_INTERWORK(s,t)  ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
#define THUMB_SET_FUNC(s,t)     ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC)    : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))

#define TC_START_LABEL(C,STR) \
  (c == ':' || (c == '/' && arm_data_in_code ()))
int arm_data_in_code PARAMS ((void));

#define tc_canonicalize_symbol_name(str) \
 arm_canonicalize_symbol_name (str);
char * arm_canonicalize_symbol_name PARAMS ((char *));

#define obj_adjust_symtab() arm_adjust_symtab ()
 extern void arm_adjust_symtab PARAMS ((void));

#ifdef OBJ_ELF
#define obj_frob_symbol(sym, punt)  armelf_frob_symbol ((sym), & (punt))
void armelf_frob_symbol PARAMS ((symbolS *, int *));
#endif

#define tc_aout_pre_write_hook(x)	{;}	/* not used */

#define LISTING_HEADER "ARM GAS "

#define OPTIONAL_REGISTER_PREFIX '%'

#define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L'))
#define LOCAL_LABELS_FB   1
#ifdef OBJ_ELF
#define LOCAL_LABEL_PREFIX '.'
#endif

/* 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.  GOTOFF does not need to be checked here because it is
   not pcrel.  I am not sure if some of the others are ever used with
   pcrel, but it is easier to be safe than sorry.  */

#define TC_FORCE_RELOCATION_LOCAL(FIX)			\
  (!(FIX)->fx_pcrel					\
   || (FIX)->fx_plt					\
   || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT12		\
   || (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32		\
   || (FIX)->fx_r_type == BFD_RELOC_32			\
   || TC_FORCE_RELOCATION (FIX))

#define TC_CONS_FIX_NEW cons_fix_new_arm
 extern void cons_fix_new_arm PARAMS ((fragS *, int, int, expressionS *));

#ifdef OBJ_ELF
#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
#else
#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
#endif

#ifdef OBJ_ELF
#define DWARF2_LINE_MIN_INSN_LENGTH 2
#endif

#define MAX_MEM_FOR_RS_ALIGN_CODE 31

/* For frags in code sections we need to record whether they contain
   ARM code or THUMB code.  This is that if they have to be aligned,
   they can contain the correct type of no-op instruction.  */
#define TC_FRAG_TYPE	int
#define TC_FRAG_INIT(fragp)	arm_init_frag (fragp)
extern void arm_init_frag PARAMS ((struct frag *));

#define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
extern void arm_handle_align PARAMS ((struct frag *));

#define md_do_align(N, FILL, LEN, MAX, LABEL)					\
  if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg))	\
    {										\
      arm_frag_align_code (N, MAX);						\
      goto LABEL;								\
    }
extern void arm_frag_align_code PARAMS ((int, int));
Commit	Line	Data
252b5132	1	/* This file is tc-arm.h
a161fe53	2	Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
49309057	3	Free Software Foundation, Inc.
252b5132 RH	4	Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
	5	Modified by David Taylor (dtaylor@armltd.co.uk)
	6
	7	This file is part of GAS, the GNU Assembler.
	8
	9	GAS is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 2, or (at your option)
	12	any later version.
	13
	14	GAS is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with GAS; see the file COPYING. If not, write to the Free
	21	Software Foundation, 59 Temple Place - Suite 330, Boston, MA
	22	02111-1307, USA. */
	23
	24	#define TC_ARM 1
	25
	26	#ifndef TARGET_BYTES_BIG_ENDIAN
	27	#define TARGET_BYTES_BIG_ENDIAN 0
	28	#endif
	29
	30	#define WORKING_DOT_WORD
	31
	32	#define COFF_MAGIC ARMMAGIC
	33	#define TARGET_ARCH bfd_arch_arm
	34
	35	#define AOUT_MACHTYPE 0
	36
	37	#define DIFF_EXPR_OK
	38
	39	#ifdef LITTLE_ENDIAN
	40	#undef LITTLE_ENDIAN
	41	#endif
	42
	43	#ifdef BIG_ENDIAN
	44	#undef BIG_ENDIAN
	45	#endif
	46
	47	#define LITTLE_ENDIAN 1234
	48	#define BIG_ENDIAN 4321
	49
	50	#if defined OBJ_AOUT
	51	#if defined TE_RISCIX
	52	# define TARGET_FORMAT "a.out-riscix"
	53	#elif defined TE_LINUX
	54	# define ARM_BI_ENDIAN
	55	# define TARGET_FORMAT "a.out-arm-linux"
	56	#elif defined TE_NetBSD
	57	# define TARGET_FORMAT "a.out-arm-netbsd"
	58	#else
	59	# define ARM_BI_ENDIAN
	60	# define TARGET_FORMAT \
	61	(target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
	62	#endif
	63	#endif /* OBJ_AOUT */
	64
	65	#ifdef OBJ_AIF
	66	#define TARGET_FORMAT "aif"
	67	#endif
68
a161fe53 AM	69	struct fix;
a161fe53 AM	70
252b5132 RH	71	#if defined OBJ_COFF \|\| defined OBJ_ELF
252b5132 RH	72	# define ARM_BI_ENDIAN
1dab94dd	73
a161fe53 AM	74	# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
a161fe53 AM	75	extern void arm_validate_fix PARAMS ((struct fix *));
252b5132	76	#endif
1dab94dd	77
252b5132 RH	78	#ifdef OBJ_COFF
252b5132 RH	79	# if defined TE_PE
252b5132 RH	80	# ifdef TE_EPOC
	81	# define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
	82	# else
	83	# define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
	84	# endif
	85	# else
	86	# define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little")
	87	# endif
	88	#endif
	89
	90	#ifdef OBJ_ELF
	91	# define TARGET_FORMAT elf32_arm_target_format()
	92	extern const char * elf32_arm_target_format PARAMS ((void));
6057a28f NC	93
	94	# define md_elf_section_change_hook() arm_elf_change_section
	95	extern void arm_elf_change_section (void);
252b5132 RH	96	#endif
252b5132 RH	97
114424c6 AM	98	#define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
	99	extern int arm_force_relocation PARAMS ((struct fix *));
	100
252b5132 RH	101	#define md_convert_frag(b, s, f) {as_fatal (_("arm convert_frag\n"));}
	102
	103	#define md_cleanup() arm_cleanup ()
	104	extern void arm_cleanup PARAMS ((void));
	105
	106	#define md_start_line_hook() arm_start_line_hook ()
	107	extern void arm_start_line_hook PARAMS ((void));
	108
	109	#define tc_frob_label(S) arm_frob_label (S)
49309057	110	extern void arm_frob_label PARAMS ((symbolS *));
252b5132 RH	111
	112	/* We also need to mark assembler created symbols: */
	113	#define tc_frob_fake_label(S) arm_frob_label (S)
	114
	115	/* NOTE: The fake label creation in stabs.c:s_stab_generic() has
	116	deliberately not been updated to mark assembler created stabs
	117	symbols as Thumb. */
	118
29c4c6b5	119	#define TC_FIX_TYPE PTR
a161fe53	120	#define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL)
29c4c6b5	121
7a91e76a	122	#if defined OBJ_ELF \|\| defined OBJ_COFF
a161fe53	123	#define EXTERN_FORCE_RELOC 1
8f36cd18	124
a161fe53	125	#define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX)
b34976b6	126	bfd_boolean arm_fix_adjustable PARAMS ((struct fix *));
a161fe53 AM	127
	128	/* Values passed to md_apply_fix3 don't include the symbol value. */
	129	#define MD_APPLY_SYM_VALUE(FIX) 0
252b5132 RH	130	#endif
	131
	132	/* We need to keep some local information on symbols. */
	133
	134	#define TC_SYMFIELD_TYPE unsigned int
174419c1 ILT	135	#define ARM_GET_FLAG(s) (*symbol_get_tc (s))
	136	#define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) \|= (v))
	137	#define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v))
252b5132 RH	138
252b5132 RH	139	#define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */
2d2255b5	140	#define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */
252b5132 RH	141	#define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */
	142
	143	#define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
	144	#define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
	145	#define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
	146
	147	#define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
	148	#define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
	149	#define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))
	150
252b5132 RH	151	#define TC_START_LABEL(C,STR) \
	152	(c == ':' \|\| (c == '/' && arm_data_in_code ()))
	153	int arm_data_in_code PARAMS ((void));
	154
	155	#define tc_canonicalize_symbol_name(str) \
	156	arm_canonicalize_symbol_name (str);
	157	char * arm_canonicalize_symbol_name PARAMS ((char *));
	158
	159	#define obj_adjust_symtab() arm_adjust_symtab ()
	160	extern void arm_adjust_symtab PARAMS ((void));
	161
	162	#ifdef OBJ_ELF
29c4c6b5 NC	163	#define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt))
29c4c6b5 NC	164	void armelf_frob_symbol PARAMS ((symbolS , int ));
252b5132 RH	165	#endif
	166
	167	#define tc_aout_pre_write_hook(x) {;} /* not used */
	168
	169	#define LISTING_HEADER "ARM GAS "
	170
	171	#define OPTIONAL_REGISTER_PREFIX '%'
	172
252b5132 RH	173	#define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L'))
252b5132 RH	174	#define LOCAL_LABELS_FB 1
2f992c04 NC	175	#ifdef OBJ_ELF
	176	#define LOCAL_LABEL_PREFIX '.'
	177	#endif
252b5132	178
a161fe53 AM	179	/* This expression evaluates to true if the relocation is for a local
	180	object for which we still want to do the relocation at runtime.
	181	False if we are willing to perform this relocation while building
	182	the .o file. GOTOFF does not need to be checked here because it is
	183	not pcrel. I am not sure if some of the others are ever used with
252b5132 RH	184	pcrel, but it is easier to be safe than sorry. */
252b5132 RH	185
a161fe53 AM	186	#define TC_FORCE_RELOCATION_LOCAL(FIX) \
	187	(!(FIX)->fx_pcrel \
	188	\|\| (FIX)->fx_plt \
	189	\|\| (FIX)->fx_r_type == BFD_RELOC_ARM_GOT12 \
	190	\|\| (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \
	191	\|\| (FIX)->fx_r_type == BFD_RELOC_32 \
	192	\|\| TC_FORCE_RELOCATION (FIX))
252b5132 RH	193
	194	#define TC_CONS_FIX_NEW cons_fix_new_arm
	195	extern void cons_fix_new_arm PARAMS ((fragS , int, int, expressionS ));
	196
252b5132 RH	197	#ifdef OBJ_ELF
	198	#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
	199	#else
	200	#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
	201	#endif
85a39694 NC	202
85a39694 NC	203	#ifdef OBJ_ELF
85a39694 NC	204	#define DWARF2_LINE_MIN_INSN_LENGTH 2
85a39694 NC	205	#endif
16a0c2d4	206
d8708f40 NC	207	#define MAX_MEM_FOR_RS_ALIGN_CODE 31
d8708f40 NC	208
16a0c2d4 NC	209	/* For frags in code sections we need to record whether they contain
	210	ARM code or THUMB code. This is that if they have to be aligned,
	211	they can contain the correct type of no-op instruction. */
	212	#define TC_FRAG_TYPE int
	213	#define TC_FRAG_INIT(fragp) arm_init_frag (fragp)
	214	extern void arm_init_frag PARAMS ((struct frag *));
	215
	216	#define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
	217	extern void arm_handle_align PARAMS ((struct frag *));
	218
	219	#define md_do_align(N, FILL, LEN, MAX, LABEL) \
	220	if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \
	221	{ \
	222	arm_frag_align_code (N, MAX); \
	223	goto LABEL; \
	224	}
	225	extern void arm_frag_align_code PARAMS ((int, int));