[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, 2003,
   2004 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

struct fix;

#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
#elif defined OBJ_AIF
# define TARGET_FORMAT "aif"
#elif defined OBJ_COFF
# define ARM_BI_ENDIAN
# if defined TE_PE
#  if defined 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
#elif defined OBJ_ELF
# define ARM_BI_ENDIAN
# define TARGET_FORMAT	elf32_arm_target_format ()
#endif

#define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)

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

#define md_cleanup() arm_cleanup ()

#define md_start_line_hook() arm_start_line_hook ()

#define tc_frob_label(S) arm_frob_label (S)

/* 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)

/* 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 ()))
#define tc_canonicalize_symbol_name(str) arm_canonicalize_symbol_name (str);
#define obj_adjust_symtab() 		 arm_adjust_symtab ()
#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

/* 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

#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)
#define HANDLE_ALIGN(fragp)	arm_handle_align (fragp)

#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;								\
    }

#ifdef OBJ_ELF
# define DWARF2_LINE_MIN_INSN_LENGTH 	2
# define obj_frob_symbol(sym, punt)	armelf_frob_symbol ((sym), & (punt))
# define md_elf_section_change_hook()	arm_elf_change_section ()
# define md_elf_section_type(str, len)	arm_elf_section_type (str, len)
# define GLOBAL_OFFSET_TABLE_NAME	"_GLOBAL_OFFSET_TABLE_"
# define LOCAL_LABEL_PREFIX 		'.'
# define TC_SEGMENT_INFO_TYPE 		struct arm_segment_info_type

enum mstate
{
  MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections.  */
  MAP_DATA,
  MAP_ARM,
  MAP_THUMB
};

struct arm_segment_info_type
{
  enum mstate mapstate;
  unsigned int marked_pr_dependency;
};

/* We want .cfi_* pseudo-ops for generating unwind info.  */
#define TARGET_USE_CFIPOP              1

/* The lr register is r14.  */
#define DWARF2_DEFAULT_RETURN_COLUMN  14

/* Registers are generally saved at negative offsets to the CFA.  */
#define DWARF2_CIE_DATA_ALIGNMENT     -4

/* CFI hooks.  */
#define tc_regname_to_dw2regnum            tc_arm_regname_to_dw2regnum
#define tc_cfi_frame_initial_instructions  tc_arm_frame_initial_instructions

#else /* Not OBJ_ELF.  */
#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
#endif

#if defined OBJ_ELF || defined OBJ_COFF

# define EXTERN_FORCE_RELOC 			1
# define tc_fix_adjustable(FIX) 		arm_fix_adjustable (FIX)
/* Values passed to md_apply_fix3 don't include the symbol value.  */
# define MD_APPLY_SYM_VALUE(FIX) 		0
# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL)	arm_validate_fix (FIX)

#endif

extern void arm_frag_align_code (int, int);
extern void arm_validate_fix (struct fix *);
extern const char * elf32_arm_target_format (void);
extern void arm_elf_change_section (void);
extern int arm_force_relocation (struct fix *);
extern void arm_cleanup (void);
extern void arm_start_line_hook (void);
extern void arm_frob_label (symbolS *);
extern int arm_data_in_code (void);
extern char * arm_canonicalize_symbol_name (char *);
extern void arm_adjust_symtab (void);
extern void armelf_frob_symbol (symbolS *, int *);
extern void cons_fix_new_arm (fragS *, int, int, expressionS *);
extern void arm_init_frag (struct frag *);
extern void arm_handle_align (struct frag *);
extern bfd_boolean arm_fix_adjustable (struct fix *);
extern int arm_elf_section_type (const char *, size_t);
extern int tc_arm_regname_to_dw2regnum (const char *regname);
extern void tc_arm_frame_initial_instructions (void);
Commit	Line	Data
252b5132	1	/* This file is tc-arm.h
aef6203b AM	2	Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
aef6203b AM	3	2004 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
a161fe53 AM	50	struct fix;
a161fe53 AM	51
69b97547 NC	52	#if defined OBJ_AOUT
	53	# if defined TE_RISCIX
	54	# define TARGET_FORMAT "a.out-riscix"
	55	# elif defined TE_LINUX
	56	# define ARM_BI_ENDIAN
	57	# define TARGET_FORMAT "a.out-arm-linux"
	58	# elif defined TE_NetBSD
	59	# define TARGET_FORMAT "a.out-arm-netbsd"
	60	# else
	61	# define ARM_BI_ENDIAN
	62	# define TARGET_FORMAT (target_big_endian ? "a.out-arm-big" : "a.out-arm-little")
	63	# endif
	64	#elif defined OBJ_AIF
	65	# define TARGET_FORMAT "aif"
	66	#elif defined OBJ_COFF
252b5132	67	# define ARM_BI_ENDIAN
252b5132	68	# if defined TE_PE
69b97547 NC	69	# if defined TE_EPOC
	70	# define TARGET_FORMAT (target_big_endian ? "epoc-pe-arm-big" : "epoc-pe-arm-little")
	71	# else
	72	# define TARGET_FORMAT (target_big_endian ? "pe-arm-big" : "pe-arm-little")
	73	# endif
252b5132 RH	74	# else
	75	# define TARGET_FORMAT (target_big_endian ? "coff-arm-big" : "coff-arm-little")
	76	# endif
69b97547 NC	77	#elif defined OBJ_ELF
	78	# define ARM_BI_ENDIAN
	79	# define TARGET_FORMAT elf32_arm_target_format ()
252b5132 RH	80	#endif
252b5132 RH	81
114424c6	82	#define TC_FORCE_RELOCATION(FIX) arm_force_relocation (FIX)
114424c6	83
69b97547	84	#define md_convert_frag(b, s, f) { as_fatal (_("arm convert_frag\n")); }
252b5132 RH	85
252b5132 RH	86	#define md_cleanup() arm_cleanup ()
252b5132 RH	87
252b5132 RH	88	#define md_start_line_hook() arm_start_line_hook ()
252b5132 RH	89
252b5132 RH	90	#define tc_frob_label(S) arm_frob_label (S)
252b5132 RH	91
	92	/* We also need to mark assembler created symbols: */
	93	#define tc_frob_fake_label(S) arm_frob_label (S)
	94
	95	/* NOTE: The fake label creation in stabs.c:s_stab_generic() has
	96	deliberately not been updated to mark assembler created stabs
	97	symbols as Thumb. */
	98
29c4c6b5	99	#define TC_FIX_TYPE PTR
a161fe53	100	#define TC_INIT_FIX_DATA(FIX) ((FIX)->tc_fix_data = NULL)
29c4c6b5	101
252b5132 RH	102	/* We need to keep some local information on symbols. */
252b5132 RH	103
69b97547	104	#define TC_SYMFIELD_TYPE unsigned int
174419c1 ILT	105	#define ARM_GET_FLAG(s) (*symbol_get_tc (s))
	106	#define ARM_SET_FLAG(s,v) (*symbol_get_tc (s) \|= (v))
	107	#define ARM_RESET_FLAG(s,v) (*symbol_get_tc (s) &= ~(v))
252b5132 RH	108
252b5132 RH	109	#define ARM_FLAG_THUMB (1 << 0) /* The symbol is a Thumb symbol rather than an Arm symbol. */
2d2255b5	110	#define ARM_FLAG_INTERWORK (1 << 1) /* The symbol is attached to code that supports interworking. */
252b5132 RH	111	#define THUMB_FLAG_FUNC (1 << 2) /* The symbol is attached to the start of a Thumb function. */
	112
	113	#define ARM_IS_THUMB(s) (ARM_GET_FLAG (s) & ARM_FLAG_THUMB)
	114	#define ARM_IS_INTERWORK(s) (ARM_GET_FLAG (s) & ARM_FLAG_INTERWORK)
	115	#define THUMB_IS_FUNC(s) (ARM_GET_FLAG (s) & THUMB_FLAG_FUNC)
	116
	117	#define ARM_SET_THUMB(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_THUMB) : ARM_RESET_FLAG (s, ARM_FLAG_THUMB))
	118	#define ARM_SET_INTERWORK(s,t) ((t) ? ARM_SET_FLAG (s, ARM_FLAG_INTERWORK) : ARM_RESET_FLAG (s, ARM_FLAG_INTERWORK))
	119	#define THUMB_SET_FUNC(s,t) ((t) ? ARM_SET_FLAG (s, THUMB_FLAG_FUNC) : ARM_RESET_FLAG (s, THUMB_FLAG_FUNC))
	120
69b97547 NC	121	#define TC_START_LABEL(C,STR) (c == ':' \|\| (c == '/' && arm_data_in_code ()))
	122	#define tc_canonicalize_symbol_name(str) arm_canonicalize_symbol_name (str);
	123	#define obj_adjust_symtab() arm_adjust_symtab ()
	124	#define tc_aout_pre_write_hook(x) {;} /* not used */
252b5132 RH	125
	126	#define LISTING_HEADER "ARM GAS "
	127
	128	#define OPTIONAL_REGISTER_PREFIX '%'
	129
252b5132 RH	130	#define LOCAL_LABEL(name) (name[0] == '.' && (name[1] == 'L'))
	131	#define LOCAL_LABELS_FB 1
	132
a161fe53 AM	133	/* This expression evaluates to true if the relocation is for a local
	134	object for which we still want to do the relocation at runtime.
	135	False if we are willing to perform this relocation while building
	136	the .o file. GOTOFF does not need to be checked here because it is
	137	not pcrel. I am not sure if some of the others are ever used with
252b5132 RH	138	pcrel, but it is easier to be safe than sorry. */
252b5132 RH	139
a161fe53 AM	140	#define TC_FORCE_RELOCATION_LOCAL(FIX) \
	141	(!(FIX)->fx_pcrel \
	142	\|\| (FIX)->fx_plt \
	143	\|\| (FIX)->fx_r_type == BFD_RELOC_ARM_GOT12 \
	144	\|\| (FIX)->fx_r_type == BFD_RELOC_ARM_GOT32 \
	145	\|\| (FIX)->fx_r_type == BFD_RELOC_32 \
	146	\|\| TC_FORCE_RELOCATION (FIX))
252b5132 RH	147
252b5132 RH	148	#define TC_CONS_FIX_NEW cons_fix_new_arm
16a0c2d4	149
d8708f40 NC	150	#define MAX_MEM_FOR_RS_ALIGN_CODE 31
d8708f40 NC	151
16a0c2d4 NC	152	/* For frags in code sections we need to record whether they contain
	153	ARM code or THUMB code. This is that if they have to be aligned,
	154	they can contain the correct type of no-op instruction. */
69b97547	155	#define TC_FRAG_TYPE int
16a0c2d4	156	#define TC_FRAG_INIT(fragp) arm_init_frag (fragp)
69b97547	157	#define HANDLE_ALIGN(fragp) arm_handle_align (fragp)
16a0c2d4 NC	158
	159	#define md_do_align(N, FILL, LEN, MAX, LABEL) \
	160	if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \
	161	{ \
	162	arm_frag_align_code (N, MAX); \
	163	goto LABEL; \
	164	}
69b97547 NC	165
	166	#ifdef OBJ_ELF
	167	# define DWARF2_LINE_MIN_INSN_LENGTH 2
	168	# define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt))
	169	# define md_elf_section_change_hook() arm_elf_change_section ()
40a18ebd	170	# define md_elf_section_type(str, len) arm_elf_section_type (str, len)
69b97547 NC	171	# define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
69b97547 NC	172	# define LOCAL_LABEL_PREFIX '.'
84798bd6	173	# define TC_SEGMENT_INFO_TYPE struct arm_segment_info_type
69b97547 NC	174
	175	enum mstate
	176	{
	177	MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */
	178	MAP_DATA,
	179	MAP_ARM,
	180	MAP_THUMB
	181	};
	182
84798bd6 JB	183	struct arm_segment_info_type
	184	{
	185	enum mstate mapstate;
	186	unsigned int marked_pr_dependency;
	187	};
	188
a394c00f NC	189	/* We want .cfi_* pseudo-ops for generating unwind info. */
	190	#define TARGET_USE_CFIPOP 1
	191
	192	/* The lr register is r14. */
	193	#define DWARF2_DEFAULT_RETURN_COLUMN 14
	194
	195	/* Registers are generally saved at negative offsets to the CFA. */
	196	#define DWARF2_CIE_DATA_ALIGNMENT -4
	197
	198	/* CFI hooks. */
	199	#define tc_regname_to_dw2regnum tc_arm_regname_to_dw2regnum
	200	#define tc_cfi_frame_initial_instructions tc_arm_frame_initial_instructions
	201
69b97547 NC	202	#else /* Not OBJ_ELF. */
	203	#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
	204	#endif
	205
	206	#if defined OBJ_ELF \|\| defined OBJ_COFF
	207
	208	# define EXTERN_FORCE_RELOC 1
	209	# define tc_fix_adjustable(FIX) arm_fix_adjustable (FIX)
	210	/* Values passed to md_apply_fix3 don't include the symbol value. */
	211	# define MD_APPLY_SYM_VALUE(FIX) 0
	212	# define TC_VALIDATE_FIX(FIX, SEGTYPE, LABEL) arm_validate_fix (FIX)
	213
	214	#endif
	215
	216	extern void arm_frag_align_code (int, int);
	217	extern void arm_validate_fix (struct fix *);
	218	extern const char * elf32_arm_target_format (void);
	219	extern void arm_elf_change_section (void);
	220	extern int arm_force_relocation (struct fix *);
	221	extern void arm_cleanup (void);
	222	extern void arm_start_line_hook (void);
	223	extern void arm_frob_label (symbolS *);
	224	extern int arm_data_in_code (void);
	225	extern char * arm_canonicalize_symbol_name (char *);
	226	extern void arm_adjust_symtab (void);
	227	extern void armelf_frob_symbol (symbolS , int );
	228	extern void cons_fix_new_arm (fragS , int, int, expressionS );
	229	extern void arm_init_frag (struct frag *);
	230	extern void arm_handle_align (struct frag *);
	231	extern bfd_boolean arm_fix_adjustable (struct fix *);
40a18ebd	232	extern int arm_elf_section_type (const char *, size_t);
a394c00f NC	233	extern int tc_arm_regname_to_dw2regnum (const char *regname);
a394c00f NC	234	extern void tc_arm_frame_initial_instructions (void);